JP4407276B2 - Brazing apparatus and brazing method for rotor coil - Google Patents

Description

  The present invention relates to a pair of axial long side rectangular conductors and a pair of circumferential long side rectangular conductors that constitute a rotor coil provided in a rotor of a relatively large electric machine such as a turbine generator. The present invention relates to a brazing apparatus and a brazing method.

  In general, a rectangular conductor used for a field winding of an air-cooled and hydrogen-cooled turbine generator is required to ensure electrical conductivity and have a predetermined mechanical strength. When applied to a coil used for a rotor, that is, a rotor coil, it is necessary to withstand long-time rotation and to maintain insulation between multiple windings as windings. For example, when the turbine generator is a rotor coil having a level of several hundred thousand kilowatts, the rectangular conductor as the winding is continuously configured as one rectangular spiral coil. FIGS. 7A and 7B are conceptual diagrams illustrating the spiral shape of the rotor coil. FIG. 7A is a view in which a part of the rotor coil is incorporated into the rotor, and FIG. 7B shows a spiral rotor coil. This rectangular spiral coil is configured so that the long side is in the direction of the rotation axis of the rotor coil (hereinafter referred to as the axial length side) and the short side is in the circumferential direction (hereinafter referred to as the peripheral length side) perpendicular to the rotational axis. Has been.

  In addition, the connection point of the spiral coil is, for example, a straight line portion on the axial length side of a flat conductor, or a corner portion that intersects the axial length side and the circumferential length side (hereinafter, the four corner portions are referred to as four corner portions). Or The spiral coil has 13 to 24 turns. If such a spiral coil is one unit, there are two types of units of the same size in the rotor of one generator, and there are eight units of different sizes, a total of 8 units x 2 types, 16 units, This is built into the rotor. The connection method of these connection locations is usually brazed manually. This brazing method may be gas brazing or high-frequency heating brazing. In general, a high-frequency heating brazing that has a large heating source and can be brazed stably and in a short time is often used.

In the case of the straight portion shown above, the type of joint of the brazed connecting portion is butt brazing as shown in FIG. 8 (a), or (b), (c), (d ), (E), and (f) (see, for example, Patent Document 1). In the case of the four corners, the matching is as shown in FIG.
Here, in the case of brazing a straight portion on the axial length side of a flat conductor, the plate width of the flat conductor at the joint is basically the same size, but in the case of brazing at the four corners, the axial length There are cases where the plate width on the side and the plate width on the circumferential side are the same, and the plate width on the circumferential side is larger. The reason why the plate width on the circumferential side is larger is to increase the efficiency of the electromagnetic current, but at this time, the portion that is likely to generate heat by the electromagnetic current is widened to improve the cooling performance. That is, the four corner brazing is necessary to increase the efficiency of the electromagnetic current in this way.
In the four-corner brazing, it is important that an arc-shaped fillet is formed in the brazing portion at the right-angled inner corner portion of the butt portion in order to eliminate the notch.

The rectangular conductor is usually made of an oxygen-free copper-based material. As the brazing material, silver brazing or phosphor copper brazing is used.
In the conventional silver brazing method of four-corner brazing, a flux is applied to the abutting surface in advance, and a silver brazing foil having a size slightly larger than the size of the abutting surface is sandwiched between the abutting portions. When the rectangular conductor is heated and the silver wax is melted, the solder is replenished manually to form an appropriate overfill (convex). The extra formation is to prevent dents (recesses) from being formed in the butt line of the butt part due to melting of the wax. At the same time, an arcuate fillet is formed. Of course, the extra portion of the brazing portion is finished in a flat state by a grinder or the like in a later process.

  FIG. 9 is a diagram showing a butt state of flat conductors when heated by a conventional high-frequency heating inductor. Although not shown, actually, a thin insulating plate is sandwiched between the high-frequency heating inductor 100 and the axial length side rectangular conductor 101 and the circumferential length side rectangular conductor 102. Further, although not shown, the high-frequency heating inductor 100 is provided with a laminated core which is a main heating source right and left along the butt line 103 just below the flat conductor.

  FIG. 10 shows a conventional method for brazing four corners manually by high frequency heating. FIG. 10A is a diagram showing a method for setting a rectangular conductor, a high-frequency heating inductor, and a brazing material. First, a thin plate material 105 of mica (mica) having insulation and heat resistance is laid on the upper surface of the illustrated high-frequency heating inductor 100. Then, the axial long side rectangular conductor 101 and the circumferential long side rectangular conductor 102 are placed thereon, and the end face and the side face are brought into contact with each other. And flatness is confirmed so that a level | step difference may not arise in the butt | matching part 106. FIG. Here, as an accurate alignment method, the side end of the axial length side rectangular conductor 101 shown in FIG. 10B is connected to the axial length side fixing jig 107, and the side end of the circumferential length side rectangular conductor 102 is It abuts against the peripheral side fixing jig 108, respectively. Further, the opposite side end portions are pressed by the axial length side fixing jig 109 and the circumferential length side fixing jig 110 so that the circumferential length side and the axial length side of the rectangular conductor are perpendicular to each other. Next, the upper surface of the rectangular conductor is pressed by the axial length side pressing jig 111 and the circumferential length side pressing jig 112. Thereafter, the axial length side fixing jig 109, the axial length side pressing jig 111, the circumferential length side fixing jig 110, and the circumferential length side pressing jig 112 are loosened once, and the circumferential length side end face and the axial length side end face A silver wax foil (thin plate shape) 113 is inserted into the butt portion. Then, the abutting surface is firmly pressed by the shaft length side fixing jig 109, the shaft length side pressing jig 111, the circumferential length side fixing jig 110, and the circumferential length side pressing jig 112 again. At this time, the flux is previously applied to the end face of the rectangular conductor before positioning.

Next, brazing during heating will be described with reference to FIG. When heated, the laminated core 114 is heated and reddish, and the entire butt 106 is heated and brazed. At this time, the brazing operator confirms the melting state of the brazing while adjusting the heating temperature by turning on / off the electric output of the high frequency heating by looking at the reddish color in the vicinity of the butting portion 106 and replenishing with the soldering row 115. To form an appropriate surplus.
JP-A-11-168845 (2nd to 4th pages, FIGS. 2 to 11)

However, in the above conventional example, since the brazing operation is manually performed in brazing the long rectangular rectangular conductor and the long circumferential rectangular conductor, the rectangular conductor is abutted by turning on and off the electric output of the high frequency heating. Estimate the temperature state by looking at the heating state in the vicinity of the part, that is, the redness on the surface, and refilling the soldering so as to prevent the formation of the fillet of the wax at the right angle part of the butt and the dent of the butt part. There is a need, there is an unsolved problem that it takes because skill was Ru need to perform these tasks in a short period of time.
Moreover, in the case of the manual brazing method as described above, there is a variation in the amount of extra brazing by the operator, and by supplying more silver brazing material than necessary, the spreading area and extra height of the brazing There is also an unsolved problem that it leads to an increase in the number of finishing work steps due to a surplus grinder in the subsequent process.

  Furthermore, since a rectangular conductor is placed on the upper surface of the high-frequency inductor and is positioned with a fixing jig, if the jig pressing from the upper surface is pressed with a strong force, the inductor's own frame is made of copper, which easily causes plastic deformation. The distance between the object to be heated and the inductor becomes non-uniform, and as a result, the difference in temperature distribution of the object to be heated, that is, the non-uniform distribution of the temperature where there are high and low temperatures on the butt line. . At the same time, there is an unsolved problem that a step is likely to occur at the abutting portion. In particular, in the inductor, when the distance between the contact surfaces of the object to be heated and the inductor becomes uneven, that is, when the variation in the distance between the contact surfaces, that is, the difference is different by 0.3 mm or more, The difference in redness can be clearly seen with the naked eye. Since the difference in redness is a temperature difference as a result, a time difference occurs at each position of the heated part until the predetermined redness is reached, which is a difference in brazing time after the silver solder melts. . That is, there is a difference between the portion where the wax melts at each position of the object to be heated and the portion just melted. Of course, it goes without saying that the parts that are likely to melt away are finished so that the dents of the butted parts cannot be made manually by refilling the wax. Since this brazing part is a part that always rotates as a rotor of the generator and requires a sufficient proof stress, the dent in the brazing part is not allowed because it becomes a notch effect and may cause damage and burnout.

  Also, in order to keep the distance between the inductor and the object to be heated constant, it is supported by an insulating epoxy glass plate or the like so that the inductor is not deformed, or is immediately fixed by a rigid housing. For example, the portion is fixed, but if the most important laminated core portion and brazed butt line portion are not fixed, a step of the butt portion is likely to occur. Here, the direct fixing of the laminated core and the butted portion is red-heated during heating, so that the insulating epoxy glass plate is easily burned out because the heat-resistant temperature is low. Of course, needless to say, fixing with a conductive metal object is impossible. In some cases, a metal frame is used at a relatively long distance. In this case, the metal frame is heated by electromagnetic induction of high-frequency power, or the heating efficiency of the original heated part is reduced and the heating time is extended. It is rarely used unless it is unavoidable.

Furthermore, guessing the heating temperature from the redness of the object to be heated at the time of brazing itself means that it depends on the experience of the skilled worker, and there will be variations in brazing quality due to individual differences among workers. There is a possibility.
In addition, as described above, the insulating mica is sandwiched between the inductor and the flat conductor, but at the end of brazing, if the object to be heated is removed from the inductor, the mica will be soldered to the object to be heated. It frequently occurs that the mica is attached to the attachment portion and must be removed and repositioned on the original inductor each time. In addition, there is an unsolved problem that the mica gradually peels off after repeated brazing and must be replaced with new mica.

Accordingly, the present invention has been made paying attention to the unsolved problems of the above-described conventional example, and performs manual labor with stable temperature control of brazing of the rectangular conductor on the axial length side and the peripheral length side. It is an object of the present invention to provide a rotor coil brazing apparatus and method that can be reliably performed without any problems.
In the present invention, there is no step at the butting portion of the brazing position, and a braille fillet can be formed at the inner corner (inner corner) where the rectangular conductor on the axial length side and the circumferential length side make a right angle, In addition, an object of the present invention is to provide a rotor coil brazing apparatus and method capable of forming a surplus at any position on the butt line at the brazing position.

In order to achieve the above object, a brazing apparatus for a motor coil according to claim 1 is a brazing apparatus for brazing a rotor coil that brazes four corners of a rotor coil provided in a rotor of an electric machine. A high-frequency heating inductor comprising a conductive pipe and a high-frequency heating inductor body fixedly held with the laminated core facing the flat surface, and an insulating / heat-resistant separating plate disposed on the flat surface of the high-frequency heating inductor When the wax foil mounting apparatus for mounting a wax foil brazing position that perpendicularly abutting one another in the axial side flat conductor and the circumferential length side rectangular conductor constituting the rotor coil, a wax foil in the row foil mounting device attached The axial length side rectangular conductor and the circumferential length side rectangular conductor are joined with each other by brazing foil, and the positioning is maintained so that the joining position is on the insulating / heat-resistant separating plate. Measure the temperature of the mechanism, the pressing mechanism that presses the vicinity of the abutting position of the long shaft rectangular conductor and the long rectangular conductor from above, and the temperature of the solder foil joining position of the long flat rectangular conductor and the long rectangular conductor. It is characterized by comprising temperature measuring means and high-frequency heating power supply control means for supplying high-frequency power to the high-frequency heating inductor body to which temperature information measured by the temperature measuring means is input.

  In the first aspect of the present invention, the laminated core faces the flat surface of the high-frequency heating inductor, and the insulating / heat-resistant separating plate is disposed on the flat surface. For example, after installing a U-shaped brazing foil at the brazing position of each of the long axis rectangular conductor and the long rectangular conductor constituting the rotor coil, the long axial rectangular conductor and the long side By fixing the brazing foil of the flat rectangular conductor and positioning and holding it with the positioning and holding mechanism so that the bonding position is on the insulating / heat-resistant separator, and by pressing from above with the pressing mechanism, A flat surface can be formed without causing a step at the brazing position of the long side rectangular conductor, and the distance from the laminated core can be constant. In this state, the brazing position is maintained while maintaining the brazing position at a predetermined temperature by supplying high frequency power to the high frequency heating inductor body by the high frequency heating power source control means while measuring the temperature of the brazing foil joining position by the temperature measuring means. Thus, high-quality brazing can be performed by performing uniform heating, and accurate brazing can be performed without requiring skill.

A rotor coil brazing device according to claim 2 is a rotor coil brazing device that brazes four corners of a rotor coil provided in a rotor of an electrical equipment, and includes a laminated core and a water-cooled conductive pipe. A high-frequency heating inductor body in which the multilayer core is fixed and held with the laminated core facing the flat surface, an insulating / heat-resistant separating plate disposed on the flat surface of the high-frequency heating inductor, and the rotor coil a row foil mounting apparatus for mounting a row foil each other at right angles butt that brazing position in the axial side flat conductor and the circumferential length side rectangular conductor constituting axial length side rectangular conductor fitted with a brazing foil in the row foil mounting device And a positioning holding mechanism that positions and holds the peripheral long side rectangular conductors with each other with brazing foil and positions the bonding position on the insulating / heat-resistant separating plate, and the positioning A brazing rod arrangement device that arranges a brazing rod at the joining position of the brazing foils positioned and held by the holding mechanism, and a pressing mechanism that presses the vicinity of the abutting position of the long shaft rectangular conductor and the long rectangular conductor from above. Temperature measuring means for measuring the temperature of the brazing foil joining position of the axial length side rectangular conductor and the circumferential length side rectangular conductor, and high frequency power to the high frequency heating inductor body to which temperature information measured by the temperature measuring means is input. A high-frequency heating power supply control means for supplying is provided.

  In the invention according to claim 2, in addition to the action of the invention according to claim 1, the axial length side rectangular conductor and the circumferential length side rectangular conductor after the U-shaped brazing foil is mounted by the brazing foil mounting apparatus, for example. The brazing foil is joined, and it is positioned and held by the positioning and holding mechanism so that the joining position is on the insulating / heat-resistant separating plate, and if necessary, the brazing rod is attached to the joined portion of the brazing foils. By arranging the brazing rod with the placement device and pressing from above with the pressing mechanism, the brazing position of the axial length side rectangular conductor and the circumferential length side rectangular conductor is made flat without causing a step, and with the laminated core The interval can be a constant interval. In this state, the brazing position is maintained while maintaining the brazing position at a predetermined temperature by supplying high frequency power to the high frequency heating inductor body by the high frequency heating power source control means while measuring the temperature of the brazing foil joining position by the temperature measuring means. It is possible to perform high-quality brazing by performing uniform heating, and a brazing rod is arranged at the joint of the brazing foil, so that the extra height can be adjusted by this brazing rod and skill is required. Accurate brazing can be performed without any problem.

Furthermore, the brazing device for a rotor coil according to claim 3 is the brazing part after brazing the butting positions of the axial length side rectangular conductor and the circumferential length side rectangular conductor in the invention according to claim 1 or 2. A forced air cooling means for forcibly cooling the air is provided.
In the invention according to claim 3, since the brazing portion is cooled by the forced air cooling means immediately after the brazing is completed, high-quality brazing can be performed and the brazing work time can be shortened.

Furthermore, b c with apparatus of the rotor coil according to claim 4 is the invention of claim 3, wherein the forced air cooling means includes a row of brazing position of the axial length side flat conductor and the circumference-side flat conductor The brazing part is provided with a gas nozzle mechanism that forcibly air-cools the brazing part immediately after the brazing is completed.
In the invention according to the fourth aspect, the brazed portion is forcibly air-cooled by the gas nozzle mechanism, so that forced air-cooling can be reliably performed.

  Still further, a brazing device for a rotor coil according to a fifth aspect is the invention according to any one of the first to fourth aspects, wherein the high-frequency heating inductor has the high-frequency heating inductor body facing the laminated core. In a state in which the laminated core is placed in an insulating resin glass housing, the insulating and heat-resistant gypsum is poured and solidified, and then the upper surface facing the laminated core is finished to a flat surface. .

  In the invention according to claim 5, it is possible to reliably hold the entire high-frequency heating inductor body with insulating and heat-resistant gypsum, and that the heat generated by the high-frequency heating inductor body is transmitted to the casing made of insulating resin glass. Therefore, it is possible to reliably prevent the casing made of insulating resin glass having high rigidity from being burned out and to reliably prevent deformation of the high-frequency heating inductor body during the brazing operation.

A rotor coil brazing device according to a sixth aspect of the present invention is the invention according to any one of the first to fifth aspects, wherein the insulating / heat-resistant separating plate can be in close contact with a flat surface of the high-frequency heating inductor, and It is characterized by comprising a ceramic flat plate having an opening at the brazing position of the long axial rectangular conductor and the circumferential rectangular conductor.
In the invention according to claim 6, the ceramic flat plate is disposed on the flat surface of the high-frequency heating inductor, and the brazing positions of the axial length side rectangular conductor and the circumferential length side rectangular conductor forming the rotor coil on the ceramic flat plate are set. By facing the opening, it is possible to maintain a uniform distance between the brazing position of the axial length side rectangular conductor and the circumferential length side rectangular conductor and the high frequency heating inductor, and the molten brazing material adheres to the ceramic flat plate. Thus, it is possible to reliably avoid adhesion of either the axial long side rectangular conductor or the circumferential long side rectangular conductor and the ceramic flat plate after cooling to withstand long-term use.

Further, a brazing device for a rotor coil according to a seventh aspect is the invention according to any one of the first to sixth aspects, wherein the brazing foil mounting device is configured such that the axial length side rectangular conductor and the circumferential length side rectangular conductor are perpendicular to each other. is characterized in that the brazing position that butt is configured to attach the U-shaped brazing foil formed separately U-shaped cross-section.
In the invention according to claim 7, since the U-shaped brazing foil having a U-shaped cross section is attached to the brazing position of the axial length side rectangular conductor and the circumferential length side rectangular conductor, the amount of brazing material at the brazing position is uniform. In addition, it is possible to easily attach the brazing foil to the axial length side rectangular conductor and the circumferential length side rectangular conductor.

  Furthermore, the brazing device for a rotor coil according to claim 8 is the invention according to claim 7, wherein the brazing foil mounting device includes a cartridge for holding a plurality of U-shaped brazing foils, A pushing jig for pushing out the lower U-shaped brazing foil, and the U-shaped brazing foil pushed out by the pushing jig while pushing up the holding weight having an inclined guide surface at the receiving position. Is inserted and held with the open end face facing outside, and the held U-shaped brazing foil is moved to the brazing position of the long shaft rectangular conductor and the long rectangular conductor, and the long shaft rectangular conductor and And a brazing foil moving mounting mechanism that is mounted on the peripheral side flat rectangular conductor.

  In the invention according to claim 8, the U-shaped brazing foil held on the cartridge is extruded one by one with a pushing jig, and the extruded U-shaped brazing foil faces its open end face to the outside, and the brazing foil Insert and hold in the moving mounting mechanism, move this brazing foil moving mounting mechanism to the brazing position of the axial length side rectangular conductor and circumferential length side rectangular conductor, and attach the U-shaped brazing foil to them, so that the axial length It is possible to easily and reliably attach the brazing foil to the side flat rectangular conductor and the circumferential long flat conductor. Moreover, in the brazing foil moving mounting mechanism, the U-shaped brazing foil is inserted and held while engaging the inclined guide surface of the holding weight and pushing up the holding weight. It is possible to reliably prevent the U-shaped brazing foil from being displaced during movement.

  Still further, according to a ninth aspect of the present invention, in the brazing device for a rotor coil according to any one of the first to eighth aspects, the high-frequency heating power source control means receives temperature information detected by the temperature measuring means as feedback information. A high frequency power control means for controlling the high frequency power supplied to the high frequency heating inductor based on a deviation between the feedback information and the target temperature information, and whether the temperature information measured by the temperature measurement means is within a set temperature range A high-frequency power stop that stops the supply of high-frequency power when the heating temperature is maintained exceeding a permissible upper limit temperature of the temperature range for a predetermined time; And a control history storage means to which control information of the high-frequency power control means is input.

  In the invention according to claim 9, the high frequency heating power source control means appropriately controls the high frequency power supplied to the high frequency heating inductor because the temperature information at the brazing position detected by the temperature measurement means is input as feedback information. Thus, the temperature of the brazing position can be accurately maintained within the set temperature range, and an alarm is issued by the alarm means when the temperature is out of the set temperature range. Further, when the heating temperature is maintained for a predetermined time after the alarm is issued exceeding the allowable upper limit temperature range in the set temperature range, the supply of the high frequency power is stopped. Then, the control information of the high-frequency power control means is stored in the control history storage means, and is displayed as necessary, so that it is possible to confirm whether or not the control state is appropriate.

A rotor coil brazing device according to a tenth aspect of the present invention is the rotor coil brazing device according to any one of the first to ninth aspects, wherein the high-frequency heating power source control means and the temperature measurement means comprise the shaft-long side rectangular conductor and the circumference. It is characterized in that the brazing temperature is held from the time when the temperature information for brazing the brazing position of the long side rectangular conductor reaches the allowable lower limit temperature of the set temperature range until the predetermined brazing holding time.
In the invention according to the tenth aspect, the heating temperature is maintained until a predetermined time elapses from the time when the allowable lower limit temperature of the temperature range is reached, and then the supply of the high frequency power is stopped by the high frequency power stopping means. The temperature and the predetermined time are simultaneously maintained.

  Furthermore, the brazing device for a rotor coil according to an eleventh aspect is the invention according to any one of the first to tenth aspects, wherein the positioning and holding mechanism makes the axial length side rectangular conductor and the circumferential length side rectangular conductor perpendicular to each other. A positioning jig provided at a position distant from the brazing position for positioning the brazing positions with each other, and the axial length side rectangular conductor and the circumferential length side rectangular conductor positioned by the positioning jig on its side surface And a fixed chuck mechanism that holds the upper surface portion at the same time, and thermal expansion is allowed on the side surface opposite to the brazing position of the axial length side rectangular conductor and circumferential length side rectangular conductor whose brazing position is the side surface portion And a pressing mechanism that presses the head.

  In the invention according to claim 11, with the positioning jig, the axial length side rectangular conductor and the circumferential length side rectangular conductor are positioned by abutting the brazing positions so as to be at right angles to each other. Holds the side and top surfaces of the side rectangular conductor and circumferential long rectangular conductor at the same time, and the brazing position is the side opposite to the brazing position of one of the axial long rectangular conductor and circumferential long rectangular conductor. When the brazing position of the axial long rectangular conductor and the circumferential long rectangular conductor is heated by pressing the side surface of the steel plate so as to allow thermal expansion, a step or deformation at the brazing position occurs due to thermal expansion. This can be surely prevented.

Furthermore, according to a twelfth aspect of the present invention, there is provided a brazing method for a rotor coil that brazes a pair of axially long rectangular conductors and a pair of circumferentially elongated rectangular conductors that constitute a rotor coil provided in a rotor of an electric machine. in brazing method of the coil, the axial length side flat conductor and the circumferential length side flat conductor brazing comprising the steps of: mounting a b c foil position, prior km c axis length side fitted with a foil flat conductor and the circumferential length side of the rectangular conductor, joined to each other in b c foil, the joining position is a high-frequency heating inductor insulator is disposed on the high-frequency heating inductor having a main body and heat separation plate above having a laminated core and a water-cooled conductive pipe that with positioning and holding as, high supplies vicinity of the joining position and the step of pressing by the pressing mechanism from above, the high-frequency heating inductor body while detecting the temperature at the braze location Is characterized in that a step of heating by controlling the microwave power.
The invention according to claim 12 can perform brazing of the rotor coil accurately by performing uniform heating at a set temperature without requiring skill.

Furthermore, according to a thirteenth aspect of the present invention, there is provided a brazing method for a rotor coil that brazes a pair of axially long rectangular conductors and a pair of circumferentially elongated rectangular conductors that constitute a rotor coil provided in a rotor of an electric machine. in brazing method of the coil, the axial length side flat conductor and the circumferential length side flat conductor brazing comprising the steps of: mounting a b c foil position, prior km c axis length side fitted with a foil flat conductor and the circumferential length side of the rectangular conductor, joined to each other in b c foil, the joining position is a high-frequency heating inductor insulator is disposed on the high-frequency heating inductor having a main body and heat separation plate above having a laminated core and a water-cooled conductive pipe that with positioning and holding as the steps of placing a step of pressing by the pressing mechanism in the vicinity of the joining position from above, the row bar joining position of the b window foil of each other that is positioned and held, the brazing Is characterized in that a step of heating by controlling the high frequency power supplied to the high-frequency heating inductor body while detecting the temperature at only position.
In the thirteenth aspect, in addition to the action of the invention according to the twelfth aspect, since the brazing rod is disposed at the joining position of the U-shaped brazing foil that is positioned and held, the extra height is adjusted by the brazing rod. Can do.

According to a fourteenth aspect of the present invention, there is provided a brazing method for a rotor coil that brazes a pair of axially long rectangular conductors and a pair of circumferentially elongated rectangular conductors that constitute a rotor coil provided in a rotor of an electric machine. in the brazing process, step a, before kilo c axis length was fitted with a foil side flat conductor and the circumferential length side flat mounting the b c foil brazing position of the axial length side flat conductor and the circumferential length side flat conductor conductors, so that joined to each other in b c foil, and its bonding position is laminated core and a water-cooled conductive pipe and high-frequency heating inductor insulator is disposed on the high-frequency heating inductor having a main body and heat separation plate above with with positioning and holding, the step and the high-frequency electric supply to the high-frequency heating inductor body while detecting the temperature in the brazing position pressed by the pressing mechanism in the vicinity of the joining position from above It is characterized by comprising the steps of controlling the by heating, and a step immediately forced air cooling the brazed portion immediately brazing ends.
In the claim 14, in addition to the effect of the invention according to claim 12, since immediately forced cooling the brazed portion immediately brazing finished, it is possible to perform b c with high quality, the brazing operation time Can be greatly shortened.

Furthermore, the brazing method for a rotor coil according to claim 15 is a rotor coil for brazing a pair of axially long rectangular conductors and a pair of circumferentially elongated rectangular conductors constituting a rotor coil provided in a rotor of an electrical equipment. in the brazing process, step a, before kilo c axis length was fitted with a foil side flat conductor and the circumferential length side flat mounting the b c foil brazing position of the axial length side flat conductor and the circumferential length side flat conductor conductors, so that joined to each other in b c foil, and its bonding position is laminated core and a water-cooled conductive pipe and high-frequency heating inductor insulator is disposed on the high-frequency heating inductor having a main body and heat separation plate above with with positioning and holding, the steps and, the braze to place a step of pressing by the pressing mechanism near the top, the row bar joining position of mutual b c foils positioned and held in the joining position A step of controlling and heating the high-frequency power supplied to the high-frequency heating inductor body while detecting the temperature at the mounting, and a step of forcibly air-cooling the brazed portion immediately after the brazing is completed. .
According to the fifteenth aspect of the present invention, the action of the twelfth aspect is combined with the action of the thirteenth and fourteenth aspects.
Furthermore, a brazing method for a rotor coil according to a sixteenth aspect is the brazing method according to any one of the twelfth to fifteenth aspects, wherein the brazing mounted on the brazing position of the long shaft rectangular conductor and the long rectangular conductor. The foil is characterized by being a U-shaped wax foil having a U-shaped cross section.
In the invention of claim 16, the same effect as that of claim 7 can be obtained.

  According to the first aspect of the present invention, the laminated core faces the flat surface of the high-frequency heating inductor, and the insulating / heat-resistant separating plate is disposed on the flat surface. For example, after installing a U-shaped brazing foil at the brazing position of each of the long axis rectangular conductor and the long rectangular conductor constituting the rotor coil, the long axial rectangular conductor and the long side By fixing the brazing foil of the flat rectangular conductor and positioning and holding it with the positioning and holding mechanism so that the bonding position is on the insulating / heat-resistant separator, and by pressing from above with the pressing mechanism, In addition to making the flat surface without any step at the brazing position of the long side rectangular conductor, the distance from the laminated core can be kept constant, and in this state, the temperature of the brazing foil joint position is measured by the temperature measuring means While supplying high-frequency power to the high-frequency heating inductor body with the high-frequency heating power supply control means, the brazing position is uniformly heated while maintaining the brazing position at a predetermined temperature, and skill is required. Ku effect is obtained that it is possible to perform accurate brazing.

  According to the second aspect of the present invention, the laminated core faces the flat surface of the high-frequency heating inductor, and the insulating / heat-resistant separating plate is disposed on the flat surface. For example, after installing a U-shaped brazing foil at the brazing position of each of the long axis rectangular conductor and the long rectangular conductor constituting the rotor coil, the long axial rectangular conductor and the long side Join the flat conductor brazing foil, position and hold it with the positioning and holding mechanism so that the joining position is on the insulating and heat-resistant separator, and arrange the brazing rod at the joining position of the brazing foil as necessary, By pressing from above with the pressing mechanism, it is possible to make a flat surface without causing a step at the brazed position of the axial length side rectangular conductor and the circumferential length side rectangular conductor, and to keep the distance from the laminated core constant. In this state, the brazing position is maintained at a predetermined temperature by supplying the high-frequency power to the high-frequency heating inductor body by the high-frequency heating power source control means while measuring the temperature of the solder foil joining position by the temperature measuring means. The brazing position can be heated evenly, and if the brazing bar is placed on the place where the U-shaped brazing foil is mounted at the brazing position by the brazing bar placement device and brazed, The effect is obtained when it is desired to secure a height higher than that of the U-shaped brazing foil or when it is desired to secure a longer brazing holding time.

Furthermore, according to the invention which concerns on Claim 3, the forced air cooling means which forcibly air-cools the brazing part after brazing the butt | matching position of the said axial length side rectangular conductor and the said circumferential length side rectangular conductor is provided. Therefore, the brazed portion after brazing can be forcibly air-cooled, high-quality brazing can be performed, and brazing operation time can be greatly shortened.
Furthermore, according to the invention of claim 4, in the brazing portion at the brazing position of the conductor, the brazing portion is immediately forcedly cooled by the gas nozzle mechanism immediately after the brazing is completed, so that the cooling time can be greatly shortened. It became so. In addition, the insulating / heat-resistant separating plate and the conductor do not adhere to each other and are not separated from each other, and the effect that they can be easily separated is obtained. As described above, in order to shorten the overall brazing work time, even if the brazing part is cooled rapidly by forced cooling, the cooling is generally rapid so that the cooling time is greatly shortened. In this case, there was no breakage of the insulating / heat-resistant separator and a decrease in the service life, which would be a problem in the case of.

  Furthermore, according to the invention of claim 5, the entire high-frequency heating inductor body can be securely held by the insulating / heat-resistant gypsum, and the heat generated by the high-frequency heating inductor body is transmitted to the casing made of insulating resin glass. It is possible to reliably prevent the casing made of insulating resin glass having high rigidity from being burned out and to reliably prevent deformation of the high-frequency heating inductor body during brazing. It is done.

  According to the invention of claim 6, the ceramic flat plate is disposed on the flat surface of the high-frequency heating inductor, and the axial length side rectangular conductor and the circumferential length side rectangular conductor brazing member forming the rotor coil on the ceramic flat plate. By facing the brazing position to the opening, the distance between the brazing position of the axial length side rectangular conductor and the circumferential length side rectangular conductor and the high-frequency heating inductor can be maintained uniformly, and the molten brazing material is a ceramic flat plate. Thus, it is possible to reliably prevent the ceramic flat plate from adhering to either the axial length side rectangular conductor or the circumferential length side rectangular conductor after cooling and to withstand long-term use.

Further, according to the invention of claim 7, since the U-shaped brazing foil having a U-shaped cross section is attached to the brazing position of the axial length side rectangular conductor and the circumferential length side rectangular conductor, the brazing material at the brazing position The amount can be made uniform, and the effect that the brazing foil can be easily attached to the axial length side rectangular conductor and the circumferential length side rectangular conductor can be obtained.
Furthermore, according to the eighth aspect of the invention, the U-shaped brazing foil held on the cartridge is extruded one by one with a pushing jig, and the extruded U-shaped brazing foil faces the open end face to the outside. First, insert and hold the solder foil moving mounting mechanism, move this solder foil moving mounting mechanism to the brazing position of the axial long side rectangular conductor and the circumferential long side rectangular conductor, and attach the U-shaped brazing foil to them. Thus, the solder foil can be easily and reliably attached to the long rectangular rectangular conductor and the long circumferential rectangular conductor. Moreover, in the brazing foil moving mounting mechanism, the U-shaped brazing foil is inclined to guide the holding weight. Since it is loaded and held while engaging the surface and pushing up the holding weight, it is possible to reliably prevent the U-shaped brazing foil from being displaced during movement by the brazing foil moving mounting mechanism. can get.

Still further, according to the invention according to claim 9, since the high frequency heating power control means receives the temperature information at the brazing position detected by the temperature measuring means as feedback information, the high frequency power supplied to the high frequency heating inductor The temperature of the brazing position can be accurately maintained within the set temperature range by appropriately controlling the temperature, and an alarm is issued by the alarm means when the temperature is out of the set temperature range. Also, in the unlikely event that the temperature rise based on temperature information detected by a temperature measurement means such as an infrared radiation thermometer does not work and the increase in heating goes out of control, the high frequency power is exceeded for a predetermined time exceeding the allowable upper limit temperature. Supply stops. Then, the effect that the control information of the high frequency power control means in the control history storage means together when Ru is stored, by being displayed as needed, it can be checked whether the correct control state can get.

  According to the tenth aspect of the present invention, when the brazing position of the conductor is brazed by the high-frequency heating power control means and the temperature measuring means, the predetermined brazing is maintained from the time when the allowable lower limit temperature of the temperature range is reached. By maintaining the brazing temperature until the time, even if the required time to reach the allowable lower limit temperature varies depending on the variation of the rising speed, the brazing quality is stable because a constant brazing holding time can always be secured. The effect is obtained.

  Further, according to the invention of claim 11, with the positioning jig, the axial length side rectangular conductor and the circumferential length side rectangular conductor are positioned by abutting the brazing positions so as to be perpendicular to each other, and in this state, the fixed chuck mechanism Simultaneously hold the side surface and the top surface of the axial long side rectangular conductor and the circumferential long side rectangular conductor, and the brazing position is a brazing position of one of the axial long side rectangular conductor and the circumferential long side rectangular conductor. When the brazing positions of the axial long rectangular conductor and the circumferential long rectangular conductor are heated by pressing the opposite side surface with a pressing mechanism so as to allow thermal expansion, a step or An effect of reliably preventing the deformation can be obtained.

Furthermore, according to the twelfth aspect of the invention, similarly to the first aspect of the invention, it is possible to perform brazing of the rotor coil accurately by performing uniform heating at a set temperature without requiring skill. The effect is obtained.
Furthermore, according to the invention which concerns on Claim 13, the effect similar to Claim 2 can be acquired.
Furthermore, according to the invention of claim 14, the same effect as that of claim 3 can be obtained.
According to the fifteenth aspect of the present invention, an effect obtained by combining the effects of the second and third aspects can be obtained.
According to the sixteenth aspect, the same effect as in the seventh aspect can be obtained.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a front view with a cross section showing a part of one embodiment of the present invention, FIG. 1B is a diagram in which a wax bar is placed on a U-shaped foil by a wax bar arranging device, and FIG. FIG. 2 is a plan view of FIG. 1.
The brazing device 1 includes an axial length side rectangular conductor 2 constituting a rotor coil and a circumferential length side rectangular conductor 3 formed wider than the axial length side rectangular conductor 2 around the right end surface of the axial length side rectangular conductor 2. It arrange | positions at right angle so that it may contact | abut to the front end side left side surface of the long side rectangular conductor 3, and the contact part is brazed as a brazing position.

  The brazing device 1 includes a high-frequency heating inductor 4 that heats a brazing position of the axial long side rectangular conductor 2 and the circumferential long side rectangular conductor 3 at a high frequency, and a flat surface of a casing 44 described later on the high frequency heating inductor 4. An insulating / heat-resistant ceramic flat plate 5 as an insulating / heat-resistant separating plate, the upper surface and the lower surface of which are arranged so as to be closed and flat surfaces parallel to each other, and the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3 are brazed. A brazing foil mounting device 7 for mounting a U-shaped brazing foil 6 at each attachment position, and an axial long side rectangular conductor 2 and a circumferential long side rectangular conductor 3 having a U-shaped brazing foil 6 mounted on an insulating / heat-resistant ceramic flat plate 5. A brazing rod 100 is disposed at the joining position of the U-shaped brazing foil 6 of the long rectangular rectangular conductor 2 and the long rectangular rectangular conductor 3 positioned and held by the positioning and holding mechanism 8. Bar placement device 10 An upper pressing mechanism 9 that presses the vicinity of the brazed position of the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3 positioned and held by the positioning holding mechanism 8 from above, and the axial length side rectangular conductor 2 and the circumference length side. The infrared radiation thermometer 10 that measures the temperature of the brazing position of the flat conductor 3 and the brazing position of the entire brazing position of the axial length side flat conductor 2 and the circumferential length side flat conductor 3 immediately after brazing are completed. And a forced cooling gas nozzle 102 as forced air cooling means for forcibly cooling the air.

  As shown in FIGS. 3A, 3 </ b> B, and 3 </ b> D, the high-frequency heating inductor 4 includes a flat plate portion 41 that is rectangular when viewed from above and a vertical plate portion 42 that protrudes upward from the left end of the flat plate portion 41. And a base plate 43 formed in an L shape on the side opposite to the vertical plate portion 42 of the flat plate portion 41, and a housing 44 made of insulating and heat-resistant epoxy glass having an open upper surface, A water-cooled copper pipe 46 that is held by a fixed holding portion 45 that is fixed to the vertical plate portion 42 of the base 43 and extends into the housing 44, and an axial long side rectangular conductor 2 that sandwiches the brazing position of the water-cooled copper pipe 46 described above. And a high-frequency heating inductor body 49 having concave laminated cores 47 and 48 disposed at a position facing the circumferential long side rectangular conductor 3.

  Here, as shown in FIGS. 3A, 3B, and 3D, the water-cooled copper pipe 46 is formed in a rectangular tube shape, and the cooling water is passed through the interior thereof. An introduction portion 46a that goes straight through the recess 44a formed in the housing 44 and enters the housing 44 so that its upper surface coincides with the flat surface at the upper end of the housing 44, and the housing 44 of the introduction portion 46a. A slope extension 46b that slopes and extends to the rear right side from the inner end, and extends rearward from the slope extension 46b in parallel with the right side plate 44b of the housing 44 to extend slightly before the rear plate 44c of the housing 44. Then, a heating part 46c for heating the vicinity of the brazing position of the peripheral long side rectangular conductor 3 in which the concave laminated core 47 is disposed on the outer peripheral surface excluding the upper surface, and the housing 44 downward from the rear end of the heating part 46c. A vertical portion 46d extending slightly before the bottom plate 44d, and the vertical portion 4 a folding portion 46e that folds forward from d along the bottom plate 44d of the housing 44 and extends to a position facing the inclined extension portion 46b, and slightly extends leftward from the folding portion 46e and then extends upward. An L-shaped portion 46f, a distance adjusting portion 46g extending leftward from the upper end of the L-shaped portion 46f so as to coincide with the flat surface of the housing 44, and a heating portion from the left end of the distance adjusting portion 46f A heating section 46h that heats the vicinity of the brazing position of the long rectangular conductor 4 that extends rearward in parallel with 46c and has a concave laminated core 48 disposed on the outer peripheral surface excluding the upper surface; A vertical portion 46i extending downward from the rear end, a folded portion 46j extending forward from the lower end of the vertical portion 46i in parallel with the bottom plate 44d, and extending upward from the front end of the folded portion 46j to the right Slightly An L-shaped portion 46k for long, and a lead-out portion 46m from the right end of the L-shaped portion 46k reaches the fixing holder 45 and extends parallel to the inlet portion 46a to the front.

  The water-cooled copper pipe 46 is aligned with the flat surface of the housing 44 so that the upper surface of the introduction portion 46a, the inclined extension portion 46b, the heating portion 46c, the spacing adjustment portion 46f, the heating portion 46g, the L-shaped portion 46k, and the lead-out portion 46m. In addition, in a state where the upper end surfaces of the laminated cores 47 and 48 are also held so as to coincide with the flat surface of the housing 44, an insulating / heat-resistant gypsum 50 is poured into the housing 44 and solidified, whereby a high-frequency heating inductor body The water-cooled copper pipe 46 and the laminated cores 47 and 48 constituting 49 are firmly fixed in the housing 44. At this time, a through-hole 44e extending in the vertical direction is formed at a position corresponding to the brazing position of the axially long flat conductor 2 and the peripheral long flat conductor 3 between the heating portions 46c and 46h of the water-cooled copper pipe 46. Then, the insulating / heat-resistant gypsum 50 is finished so that its upper surface is slightly higher than the flat surface when solidified, and the upper surface is ground to coincide with the flat surface. By doing so, the entire surface of the high-frequency heating inductor 4 becomes a flat surface, and this flat surface can receive the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3, thereby improving the mechanical strength. In addition, the distances between the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3 and the laminated cores 47 and 48 can be made constant at all times, and variations in heating temperature as in the conventional example can be prevented.

As shown in FIG. 3 (c), the insulating / heat-resistant ceramic flat plate 5 includes an L-shaped plate portion 5a formed in an L shape when viewed from a plane supporting the shaft-long flat conductor 3, and the L-shaped plate. A flat rectangular conductor that is in contact with the short piece side of the plate portion 5a and whose side edge is opposed to the long piece side with an interval corresponding to a through hole 44e formed in the housing 44 of the high-frequency heating inductor 4. 3 and a rectangular flat plate portion 5 b that supports 3 . The L-shaped plate portion 5a is placed on the left half of the flat surface of the high-frequency heating inductor 4 so that the right-side surface is along the left side wall forming the through hole 44e. The left side surface is placed along the right side wall forming the through hole 44e in the right half of the flat surface.

  As shown in FIG. 4, the brazing foil mounting device 7 has a width substantially equal to the width of the long shaft rectangular conductor 2 on the right end surface of the long shaft rectangular conductor 2 and the left front surface of the peripheral long flat conductor 3. And a vertical foil portion 6a having a height substantially equal to the thickness of the long rectangular conductor 2 and horizontal foil portions 6b and 6c extending, for example, leftward from the upper and lower ends of the vertical foil portion 6a. A U-shaped brazing foil 6 having a U-shaped cross section made of a silver brazing material is attached to the right end face of the axial-long flat conductor 2 and the front-end right-hand side of the peripheral long flat conductor 3. Here, the U-shaped brazing foil 6 is formed with a curled portion 6d that slightly curves and extends outward at the free ends of the horizontal foil portions 6b and 6c.

  As shown in FIGS. 5 (a) to 5 (c), the brazing foil mounting apparatus 7 stacks and holds a large number of U-shaped brazing foils 6 in the vertical direction, and the lowermost U-shaped at the lower end. The vertical foil portions 6a of the U-shaped wax foil in which the two cartridges 7c and 7d having insertion holes 7a and 7b through which only the wax foil 6 can be taken out are provided are back-to-back with each other and are parallel with a slight gap therebetween. The U-shaped wax foil supply unit is provided with an extrusion jig 7e composed of an air cylinder, for example, which simultaneously pushes the U-shaped wax foil 6 through one insertion hole 7a of the cartridges 7c and 7d. 7f and the U-shaped brazing foil supply portion 7f receive the U-shaped brazing foil 6, and the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3 face each other with their brazing positions kept at a predetermined interval. Move to the positioned solder foil mounting part 7g It is composed of a wax foil movable mounting mechanism 7h mounting the Jo brazing foil 6 in the axial side flat conductor 2 and the circumference-side flat conductor 3.

  The brazing foil moving and mounting mechanism 7h holds two U-shaped brazing foils 6 that are simultaneously pushed out from the two cartridges 7c and 7d arranged in the U-shaped brazing foil supply unit 7f on the base 7i. It has a configuration in which the portions 7j and 7k are formed. Each of the holding portions 7j and 7k is attached above a height of a back plate 7m fixed to the base 7i and a height slightly higher than the height of the U-shaped brazing foil 6 from the base 7i of the back plate 7m. With the cover plate 7n having a U-shape when viewed from the plane, the three sides excluding the lower back plate 7m are opened. A holding weight 7o is slidably disposed in the vertical direction in the holding portions 7j and 7k. The holding weight 7o has a height that is higher than the height of the lower open portion of the cover plate 7n, and has a depth and a length that are substantially equal to the depth and length of the U-shaped brazing foil 6. An inclined guide surface 7p is formed on the lower end surface on the charging side of the U-shaped wax foil 6 so as to incline downward from the height position slightly higher than the height of the U-shaped wax foil 6 and reach the lower end surface. The weight of the brazing foil 6 is set so as not to deform.

  First, in the state where the U-shaped brazing foil 6 is not held by the holding portions 7j and 7k, the lower surface of the holding weight 7o contacts the base 7i, and the upper end surface Becomes higher than the lower end surface of the cover plate 7n, and the holding weight 7o is held by the cover plate 7n without jumping outward. In this state, the wax foil moving and mounting mechanism 7h is moved to the U-shaped wax foil supply part 7e by the transport mechanism, and the open parts of the holding parts 7j and 7k are brought close to and opposed to the insertion holes 7b of the cartridges 7c and 7d.

  In this state, the pushing jig 7e is operated to simultaneously push out the U-shaped brazing foil 6 held at the lowermost stage of both the cartridges 7c and 7d and insert it into the holding portions 7j and 7k. In these holding portions 7j and 7k, when the U-shaped brazing foil 6 is inserted, the leading end thereof comes into contact with the inclined guide surface 7p of the holding weight 7o, whereby the U-shaped brazing foil 6 is inserted. Accordingly, when the holding weight 7o is lifted upward and the insertion of the U-shaped wax foil 6 is completed, the holding weight 7o is placed on the upper surface, and the holding weight 7o The U-shaped wax foil 6 is held by the weight without coming out of the holding portions 7j and 7k. In the holding state of the U-shaped brazing foil 6, the curled portion 6d is held in a state of protruding outward from the base 7i and the cover plate 7n.

  Thereafter, the wax foil moving and mounting mechanism 7h is moved from the U-shaped wax foil supply section 7f to the wax foil mounting section 7g by operating the transport mechanism, and the U-shaped wax foil 6 held by the holding sections 7j and 7k. The open end surface on which the curled portion 6d is formed is stopped at an intermediate position between the rectangular conductors 2 and 3 so as to oppose the right end surface of the long rectangular conductor 2 and the front left side surface of the circumferential rectangular conductor 3. From this state, the brazing foil moving and mounting mechanism 7h is moved to the left, and the U-shaped brazing foil 6 held by the holding portion 7j is fitted to the right end surface of the long rectangular conductor 2, and then the brazing foil The U-shaped brazing foil 6 is fitted to the axial-long side rectangular conductor 2 by moving the movable mounting mechanism 7h to the right peripheral long-side rectangular conductor 3 side. The holding weight 7o is detached from the holding portion 7j and lowered by its own weight, so that the base 6i. It returns to the initial position in contact with the upper surface.

After that, the U-shaped brazing foil 6 held by the holding portion 7k is fitted to the right side surface of the front end side of the circumferential long side rectangular conductor 3, and then the brazing foil moving mounting mechanism 7h is returned to the intermediate position, thereby The U-shaped brazing foil 6 fitted to the long side flat conductor 3 is detached from the holding portion 7k, and the holding weight 7o is lowered by its own weight and returns to the initial position where it contacts the upper surface of the base 6i.
After completing the mounting of the U-shaped brazing foil, the U-shaped brazing foil 6 stored in the cartridges 7c and 7d is held again by moving the brazing foil moving mounting mechanism 7h to the U-shaped brazing foil supply unit 7e. 7j and 7k, and the above operation is repeated.

  In FIG. 2, the positioning holding mechanism 8 receives the front side surface of the long shaft rectangular conductor 2 on the left side of the high-frequency heating inductor 4 and positions the long shaft rectangular conductor 2 in the front-rear direction. And an axial length side fixed chuck 8b for simultaneously pressing the rear side surface and the upper surface of the axial length side rectangular conductor 2 disposed opposite to the axial length side positioning jig 8a and the opposite side across the axial length side rectangular conductor 3; A peripheral side positioning jig 8c for receiving the left side surface of the peripheral side flat conductor 3 on the rear side of the high frequency heating inductor 4 and positioning the peripheral side flat conductor 3 in the left-right direction, and the peripheral side positioning jig A pressing jig 8d that presses against the right side surface of the circumferential long rectangular conductor 3 disposed opposite to the opposite side of the tool 8c and the circumferential long rectangular conductor 3, and a rear side of the circumferential positioning jig 8c. Simultaneously press the left side and top side of the perimeter long side rectangular conductor 3 A peripheral ceramic chuck 8e, a pressing ceramic plate 8f that opposes the right side surface of the high frequency heating inductor 4 and presses against the right side surface of the front end side of the peripheral length side rectangular conductor 3, and the pressing ceramic plate 8f has a peripheral length. It is comprised with the press spring 8g as an elastic body pressed so that the thermal expansion of the left-right direction of the side flat conductor 3 may be accept | permitted. In the positioning and holding mechanism 8, the abutting position P where the U-shaped brazing foil 6 contacts the axially long flat conductor 2 and the circumferential flat conductor 3 back to back corresponds to the through hole 44 e of the high frequency heating inductor 4. Positioning and holding in relation to position.

The upper pressing mechanism 9 is provided with a U-shaped brazing foil 6 of an axial long side rectangular conductor 2 and a circumferential long side rectangular conductor 3 positioned on an insulating / heat resistant ceramic plate 5 placed on the high frequency heating inductor 4. A pressing ceramic jig 9a movably arranged in the vertical direction so as to straddle the brazing position in the horizontal direction, and a pressing jig having a universal joint structure connected to the upper surface of the pressing ceramic jig 9a 9b.
The infrared radiation thermometer 10 irradiates red guide spot light in the vicinity of the brazing position of the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3, measures the temperature near the brazing position, and measures the measured temperature. The detection information Td is output to the high frequency heating power supply circuit 11 and the sequencer 12 as shown in FIG.

The high-frequency heating power supply circuit 11 receives the temperature detection information Td measured by the infrared radiation thermometer 10 as feedback information, and the high-frequency heating target temperature T set by the high-frequency heating temperature setting device 13 that sets the high-frequency heating target temperature. ^* Is input, and, for example, as shown in the following equation (1), a value obtained by multiplying the temperature deviation e (= T ^* −Td) obtained by subtracting the temperature detection information Td from the high-frequency heating target temperature T ^* by the proportional control gain Kp The power supply command value P is calculated by adding the value obtained by multiplying the integral value ∫edt of the temperature deviation e by the integral control gain Ki and the value obtained by multiplying the differential value de / dt of the temperature deviation e by the differential control gain Kd, Based on the calculated power supply command value P, one or both of the frequency and the power value of the high-frequency power supplied to the water-cooled copper pipe 46 of the high-frequency heating inductor 4 are adjusted to heat at the brazing position. The temperature is PID controlled to an appropriate value and high frequency power data is output to the sequencer 12.
P = Kp · e + Ki · ∫edt + Kd · de / dt (1)

  Further, in the sequencer 12, the allowable upper limit temperature and the allowable lower limit temperature of the brazing position are set, and the temperature detection information Td input from the infrared radiation thermometer 10 is the allowable upper limit temperature and the allowable lower limit temperature in a steady state excluding a transient state. When the temperature detection information Td is outside the allowable temperature range, the alarm signal is output to the alarm circuit 14 and the alarm circuit 14 outputs an alarm signal. An alarm generation process is performed to perform either or both of sound generation and alarm display lighting. As shown in FIG. 6B, when the temperature detection information Td falls within the allowable temperature range just below the allowable lower limit temperature, the measurement is started from the time when the allowable lower limit temperature is reached and the allowable minimum holding time is not reached. A signal is output to the alarm circuit 14 to execute the alarm generation process (A waveform). Further, when the allowable minimum holding time is exceeded, no alarm is output. Regardless of whether or not an alarm is output, brazing is executed until a predetermined brazing time (B waveform). When the predetermined brazing time is reached, a power output stop command for stopping the supply of high-frequency power to the high-frequency heating inductor body 49 is output to the high-frequency heating power supply circuit 11. Further, the input temperature detection information Td, high frequency power data, and alarm occurrence status information are sequentially output to the personal computer 15 and stored as history information in a storage device such as a hard disk of the personal computer 15, and the heating temperature transition waveform Is displayed on the display screen. By extracting the temperature detection information Td, alarm occurrence status information and high-frequency power data at the time of brazing from the history information stored in the personal computer 15 and analyzing the extracted information, the brazing quality status is accurately determined. It becomes possible to analyze.

  As shown in FIG. 6C, even if the supply of high-frequency power is constant, the temperature rise during heating varies, for example, even if the time to reach the allowable lower limit temperature is different as in the C waveform and D waveform, the allowable lower limit Brazing is maintained until a predetermined brazing holding time th from when the temperature is reached, and when the time is reached, the high frequency heating power supply circuit 11 stops the supply of high frequency power to the high frequency heating inductor body 49. Is output.

Next, the operation of the above embodiment will be described.
First, as shown in FIGS. 5A to 5C, the brazing foil moving and mounting mechanism 7h of the brazing foil mounting apparatus 7 is moved to the brazing foil supply unit 7f, and the holding portions 7j and 7k are opened at the cartridge 7c. And 7d through the insertion hole 7b. In this state, the U-shaped wax foil 6 is simultaneously extruded from the cartridges 7c and 7d by the extrusion jig 7e, and the holding weight 7o is held upward while being held upward by the holding portions 7j and 7k of the wax foil moving mounting mechanism 7h. . At the same time or before and after this, the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3 to be brazed are placed at predetermined positions of the brazing foil device portion 7g of the brazing foil mounting device 7 as shown in FIG. Then, the front end face of the axial length side rectangular conductor 2 serving as the brazing position and the front end side left side face of the circumferential length side rectangular conductor 3 are positioned and held facing each other with a predetermined distance therebetween.

  Next, the brazing foil moving and mounting mechanism 7h is lowered to the brazing foil mounting portion 7g, and the U-shaped brazing foil 6 held by the holding portions 7j and 7k is respectively connected to the front end face of the axial long rectangular conductor 2 and the peripheral long side rectangular conductor. 3 is opposed to the left side surface on the front end side. Next, the brazing foil moving and mounting mechanism 7h is moved to the left, and the U-shaped brazing foil 6 held by the holding portion 7j is fitted to the front end surface of the long shaft rectangular conductor 2 and then the brazing foil is moved and mounted. The mechanism 7h is moved to the right, and the U-shaped brazing foil 6 held by the holding portion 7k is fitted to the left side surface of the front end side of the circumferential long side rectangular conductor 3. Thereafter, the wax foil moving and attaching mechanism 7h is returned to the center position in the left-right direction and then raised and returned to the U-shaped solder foil supply unit 7f.

  An axial long flat conductor 2 and a peripheral long flat conductor 3 to which a U-shaped brazing foil 6 is attached are insulated and heat resistant ceramic flat plates disposed on the high frequency heating inductor 4 shown in FIG. 1 by a transfer means such as a transfer robot. 2, the front end surface of the axial length side rectangular conductor 2 is brought into contact with the positioning jig 8 a and the left side surface of the circumferential length side rectangular conductor 3 is brought into contact with the positioning jig 8 c as shown in FIG. 2. Thus, the front end surface of the long rectangular conductor 2 and the front end surface of the peripheral rectangular conductor 3 are flush with each other, and the U-shaped brazing foils 6 mounted at the brazing positions of both the rectangular conductors 2 and 3 are back to back. 1, the circumferential side rectangular conductor 3 is pressed and positioned by the pressing jig 8 d so that the abutting position P becomes the center position of the through hole 44 e of the high frequency heating inductor 4 as shown in FIG. When positioning is complete, the fixed chuck 8b and the axial length side flat conductor 2 and the circumference-side flat conductor 3 is fixed held in 8e, pressing the ceramic plate 8f presses the front end right side of the perimeter side flat conductor 3 via the compression spring 8 g. Then, the axial length side rectangular conductor 2 and the circumferential length side rectangular are pressed by pressing the brazing positions of the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3 with the pressing ceramic jig 9a of the upper pressing mechanism 9. The conductor 3 is brought into close contact with the insulating / heat-resistant ceramic flat plate 5, and the lower surfaces of the axial long side rectangular conductor 2 and the circumferential long side rectangular conductor 3 and the flat surface of the high frequency heating inductor 4 are held at a constant interval.

  When the fixed holding of the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3 is completed, for example, the sequencer 12 outputs a power supply command for starting the supply of high frequency power to the high frequency heating power supply circuit 11, and the water-cooled copper The cooling water flow into the pipe 46 is started. When receiving a power supply command from the sequencer 12, the high-frequency heating power supply circuit 11 starts to supply high-frequency power having a predetermined power value at a predetermined frequency to the high-frequency heating inductor body 49 of the high-frequency heating inductor 4.

As described above, when high-frequency power is supplied to the high-frequency heating inductor body 49, the axial length side facing these is formed by the magnetic field formed by the laminated cores 48 and 47 in the heating parts 46 h and 46 c of the water-cooled copper pipe 46. A secondary current is induced in the vicinity of the U-shaped brazing foil 6 mounted at the brazing position of the flat rectangular conductor 2 and the circumferential long flat rectangular conductor 3 and heated.
By this heating, the temperature at the brazing position measured by the infrared radiation thermometer 10 is fed back to the high-frequency heating power circuit 11, PID control is performed by the high-frequency heating power circuit 11, and the temperature is measured by the infrared radiation thermometer 10. Either or both of the frequency and the power value of the high-frequency power supplied to the high-frequency heating inductor body 49 of the high-frequency heating inductor 4 are controlled so that the temperature falls within the set temperature range.

  At this time, there is no step between the high-frequency heating inductor body 49 and the axial length side rectangular conductor 2 and the peripheral length side rectangular conductor 3 to be brazed, and the axial length side rectangular conductor 2 and the peripheral length side. Since the distance between the flat conductor 3 and the heating parts 46h and 46c of the high-frequency heating inductor body 49 and the laminated cores 47 and 48 is a constant value, the brazing position where the U-shaped brazing foil 6 is mounted is heated uniformly. Is done.

  When the temperature of the brazing position measured by the infrared radiation thermometer 10 falls within the set temperature range, the measurement is started from the time when the allowable lower limit temperature is reached, and when the allowable minimum holding time is not reached, an alarm signal is output. Output to the alarm circuit 14 to execute the alarm generation process. That is, an alarm is issued to the operator by generating an alarm sound or performing an alarm display such as lighting of an alarm lamp. Further, when the allowable minimum holding time is exceeded, no alarm is output. Regardless of whether an alarm is output, brazing is performed until a predetermined brazing time. If the allowable lower limit temperature is not reached from the beginning, the alarm generation process is executed when a time set to be equal to or shorter than the predetermined brazing time is reached. Further, when the heating temperature is maintained exceeding the allowable upper limit temperature of the temperature range for a predetermined time, a power output stop command is output from the sequencer 12 to the high-frequency heating power supply circuit 11, and the high-frequency heating power supply circuit 11 responds accordingly. The supply of high-frequency power to the high-frequency heating inductor body 49 is stopped.

  In this way, the axial-long rectangular conductor 2 and the circumferential-long rectangular conductor 3 are controlled to a set temperature range by high-frequency heating, whereby the U-shaped brazing foil 6 is uniformly melted and the axial-long rectangular conductor 2 When the vertical plate portion 6a at the abutting position between the front end surface and the left side surface of the circumferential long side rectangular conductor 3 is melted and its volume is reduced, the horizontal plate portions 6b and 6c are also in a molten state at the same time. The melted portions of the horizontal plate portions 6b and 6c gather at the butting position P to form a surplus, and an arcuate fillet is also formed, so that the molten brazing material at the butting position is insufficient and a recess is formed. This can be surely prevented, and there is no need for the operator to perform a row soldering.

  By continuing the high-frequency heating state of the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3, thermal expansion occurs in the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3. Since the right side surface on the front end side corresponding to the high-frequency heating inductor 4 is held by the pressing ceramic jig 8f through the pressing spring 8g, the side flat conductor 3 is contracted by the pressing spring 8g, so that the axial length side The thermal expansion of the flat rectangular conductor 2 and the peripheral long side rectangular conductor 2 can be allowed, and the rising and falling due to the thermal expansion at the abutting position P of the axial long flat conductor 2 and the peripheral long rectangular conductor 3 are ensured. This can prevent the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3, the heating portions 46 h and 46 c of the high frequency heating inductor body 49, and the laminated cores 47 and 48 from being kept constant.

  Thereafter, when the brazing heating time reaches the set time, a power output stop command is output from the sequencer 12 to the high-frequency heating power supply circuit 11, and in response thereto, the high-frequency heating power supply circuit 11 supplies high-frequency power to the high-frequency heating inductor body 49. As a result, the induction heating of the long shaft rectangular conductor 2 and the long rectangular conductor 3 is finished, and after cooling and the brazing material is completely solidified, the upper pressing mechanism 9 is retracted upward and pressed. After the jig 8d and the pressing ceramic jig 8f are retracted to the right, the fixed chucks 8b and 8e are released, and the axially long rectangular conductor 2 and the circumferentially long rectangular conductor 3 that have been brazed are transported as required. Then, it is conveyed from above the high frequency heating inductor 4 to the outside.

Here, in the brazing portion at the brazing position of the axial length side rectangular conductor and the circumferential length side rectangular conductor, the brazing portion is immediately forcedly cooled by the gas nozzle mechanism 102 immediately after brazing, instead of natural cooling. It is also possible to do. According to this method, the cooling time can be shortened to half or less, and the entire brazing work time can be shortened.
At this time, the axial long side rectangular conductor 2 and the circumferential long side rectangular conductor 3 are placed on the insulating / heat-resistant ceramic flat plate 5. 3 and 3 are not attached to and separated from each other, and repeated brazing does not cause burnout or damage. This eliminates the troublesome manual replacement, and also hinders automation in brazing. Never become.

  Thus, according to the above embodiment, the axial length side rectangular conductor 2 and the circumferential length side rectangular conductor 3 can be automatically and easily brazed at the butting position P. At this time, the U-shaped brazing foil 6 is mounted on the brazing position of the axial long side rectangular conductor 2 and the circumferential long side rectangular conductor 3 by the brazing foil mounting device 7 and then disposed on the flat surface of the high frequency heating inductor 4. After being placed on the heat-resistant ceramic flat plate 5 and positioned and held by the positioning and holding mechanism 8, high-frequency power is supplied from the high-frequency heating power supply circuit 11 to the high-frequency heating inductor 4. Since the U-shaped brazing foil 6 is melted by induction heating evenly at the brazing position, the brazing material is gathered at the butting position P and becomes overfilled. As a result, it is possible to reliably prevent the concave brazing, and the amount of brazing material to be used is made constant. If necessary, as shown in FIG. 1 (b), the brazing rod 100 can be placed and brazed by the brazing rod arrangement device 101 on the joint portion of the U-shaped brazing foil that has been positioned and held. This method is convenient when it is desired to secure the height of the surplus higher than the U-shaped brazing foil, or when it is desired to secure a longer brazing holding time. Since the soldering height is not simply secured because the solder rod is simply placed, the molten brazing material has a certain viscosity while being in a liquid state, and not only prevents the phenomenon of dripping down due to gravity, but also the capillary phenomenon. As the volume of the brazing rod penetrates into the joint of the U-shaped brazing foil, the brazing rod has a viscosity so that it can prevent dripping (falling) of the brazing and secure a longer brazing holding time. Merits are added. Here, there is a certain amount of viscosity and the volume weight of the brazing rod, so that not only the holding time becomes longer, but the amount of brazing material is large on the upper side (upper surface) and the lower side (lower surface) that are brazed. There is a kind of tension between the upper side and the lower side, and because the force of volume and viscosity of the brazing material is slightly higher than the force acting on the lower side of gravity and capillary action, the lower side of the wax Therefore, even if the brazing holding time is lengthened, the necessary extra height can be secured. The fact that the brazing holding time can be secured for a long time also means that the range of optimum brazing conditions can be widened as a result in the case of automatic brazing.

  Further, the temperature of the brazing position is detected by the infrared radiation thermometer 10, and this measured temperature information is supplied to the high-frequency heating power supply circuit 11, and based on the deviation from the high-frequency heating target temperature set by the high-frequency heating temperature setting device 13. By controlling the frequency and / or power value of the high-frequency power supplied to the high-frequency heating inductor body 49 of the high-frequency heating inductor 4, the brazing position temperature can be reliably maintained within the set temperature range. Accurate brazing processing can be performed without requiring high-frequency power control.

  In addition, the measured temperature measured by the infrared radiation thermometer 10 is supplied to the sequencer 12, and when the measured temperature falls outside the preset temperature range, an alarm signal is output to the alarm circuit 14. Thus, the alarm circuit can issue an alarm to the operator, and the operator can reliably recognize the occurrence of the abnormality. Further, when the heating temperature is maintained exceeding the allowable upper limit temperature of the temperature range for a predetermined time, a power output stop command is output from the sequencer 12 to the high-frequency heating power supply circuit 11, and the high-frequency heating power supply circuit 11 is responded accordingly. In response to this, the high-frequency heating power supply circuit 11 stops the supply of high-frequency power to the high-frequency heating inductor body 49. In the unlikely event that the control of the constant temperature based on the temperature information measured by the infrared thermometer does not work and the increase in heating goes out of control, the supply of high-frequency power will stop after a predetermined time exceeding the allowable upper limit temperature. The failure of the equipment due to overheating can be prevented. At this time, the temperature measured by the infrared radiation thermometer 10 and the high-frequency power information output from the high-frequency heating power supply circuit 11 are supplied to the personal computer 15 and stored as history information in a storage means such as a hard disk. Since the temperature transition status at the attachment position is displayed on the display, it is possible to easily grasp the abnormality occurrence status.

Further, since the folded portions from the heating portions 46c and 46h of the water-cooled copper pipe 46 constituting the high-frequency heating inductor body 49 are formed below the heating portions 46c and 46h, the width of the high-frequency heating inductor 4 is reduced. Thus, the high-frequency heating inductor 4 can be reduced in size.
In addition, in the said embodiment, although the case where the water-cooled pipe was formed with the copper pipe was demonstrated, it is not limited to this, When it can form with a conductive metal and it forms in a rectangular tube shape Not limited to this, it may be formed in a cylindrical shape.

Moreover, in the said embodiment, although the case where the infrared radiation thermometer 10 was applied as a temperature measurement means was demonstrated, it is not limited to this, Other non-contact-type thermometers can be applied.
Furthermore, in the said embodiment, although the case where the U-shaped brazing foil 6 was applied was demonstrated, it is not limited to this, The both sides which united the vertical board part 6a of the U-shaped brazing foil 6 back to back An I-shaped brazing foil having a U-shaped portion is applied, and one U-shaped portion of this I-shaped brazing foil is attached to, for example, the front end surface of the long axial rectangular conductor 2 and then the peripheral long rectangular conductor 3 The left side surface of the front end side may be inserted into the other U-shaped part of the I-shaped brazing foil. Further, the U-shaped brazing foil 6 is not limited to being formed of a silver brazing material, and other brazing materials such as phosphor copper brazing material can be applied.

Furthermore, in the above-described embodiment, the case where the insulating / heat-resistant ceramic flat plate 5 is configured by the two plate portions 5a and 5b has been described. However, the present invention is not limited to this, and the through hole 44e of the high-frequency heating inductor 4 is used. It may be configured by a single insulating / heat-resistant ceramic plate provided with a notch corresponding to the above.
Furthermore, in the above embodiment, the case where the casing 44 is made of epoxy glass has been described. However, the present invention is not limited to this, and is made of a non-conductive synthetic resin material having a predetermined mechanical strength. You may do it.

  Moreover, in the said embodiment, although the personal computer 15 was connected to the sequencer 12 and the history information was memorize | stored and the temperature transition condition was displayed, it was not limited to this, The sequencer 12 itself may be provided with a history information storage function and a temperature transition status display function, or a dedicated device having a history information storage function and a temperature transition status display function may be provided in place of the personal computer 15. May be.

(A) is the front view which made the cross section the part which shows one Embodiment of this invention. (B) is a figure which shows the state which mounted the wax bar on the U-shaped foil of (a). It is a top view of FIG. It is a figure which shows the high frequency heating inductor which can be applied to this invention, (a) is a top view, (b) is a side view, (c) is a top view of an insulating and heat-resistant ceramic flat plate, (d) is (a). It is an AA line end elevation view. It is explanatory drawing which shows the mounting state of the U-shaped brazing foil to the axial long side rectangular conductor and the circumferential long side rectangular conductor. It is a figure which shows the structure of a U-shaped wax foil mounting apparatus, (a) is a side view of a cartridge, (b) is sectional drawing which shows a U-shaped wax foil supply part, (c) is a U-shaped wax foil mounting. It is sectional drawing which shows a part. In the embodiment of the present invention, (a) is a block diagram showing a power supply control system of a high-frequency heating inductor, (b) is a temperature control waveform in which heating stops at a predetermined brazing time, and (c) is a predetermined brazing holding time. It is a temperature control waveform in which heating stops. It is a figure explaining the spiral shape of a rotor coil. It is a figure which shows the conventional brazing joint. It is explanatory drawing which shows the butt | matching state of a flat conductor when heating with the conventional high frequency heating inductor. It is explanatory drawing which shows the brazing state by the manual operation of the conventional high frequency heating.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Brazing apparatus 2 Axis long side rectangular conductor 3 Circumferential length side rectangular conductor 4 High frequency heating inductor 43 Base 44 Case 46 Water-cooled copper pipe 46c, 46h Heating part 47, 48 Laminated core 49 High frequency heating inductor 50 Insulation, heat resistant gypsum 5 Insulating and heat-resistant ceramic flat plate 6 U-shaped brazing foil 7 Brazing foil mounting device 7c, 7d Cartridge 7e Extrusion jig 7f U-shaped brazing foil supply section 7g Brazing foil mounting 7h Brazing foil moving mounting mechanism 7j, 7k Holding section 7o For holding Weight 7p Inclined guide surface 8 Positioning and holding mechanism 9 Upper pressing mechanism 10 Infrared radiation thermometer 11 High-frequency heating power circuit 12 Sequencer 13 High-frequency heating temperature setting device 14 Alarm circuit 15 Personal computer 100 Row rod 101 Row rod arrangement device 102 Forced cooling gas nozzle

Claims (16)

In a brazing device for a rotor coil that brazes four corners of a rotor coil provided in a rotor of an electric device,
A high-frequency heating inductor main body composed of a multilayer core and a water-cooled conductive pipe is fixedly held with the multilayer core facing the flat surface, and an insulation / disposition disposed on the flat surface of the high-frequency heating inductor. a heat-resistant separator plate, and the brazing foil mounting apparatus for mounting a wax foil brazing position that perpendicularly abutting one another in the axial side flat conductor and the circumferential length side rectangular conductor constituting the rotor coil, in the row foil mounting device A positioning and holding mechanism for joining the axial length side rectangular conductor and the circumferential length side rectangular conductor, to which the brazing foil is mounted, to each other with the brazing foil, and positioning and holding the joining position on the insulating / heat-resistant separating plate; A pressing mechanism that presses the vicinity of the abutting position of the axial long side rectangular conductor and the circumferential long side rectangular conductor from above, and a temperature that measures the temperature of the brazing foil joining position of the axial long side rectangular conductor and the circumferential long side rectangular conductor. Measuring means, brazing device of the rotor coil, characterized in that the temperature information measured by the temperature measuring means and a high-frequency heating power control means for supplying high frequency power to the high-frequency heating inductor body inputted. In a brazing device for a rotor coil that brazes four corners of a rotor coil provided in a rotor of an electric device,
A high-frequency heating inductor main body composed of a multilayer core and a water-cooled conductive pipe is fixedly held with the multilayer core facing the flat surface, and an insulation / disposition disposed on the flat surface of the high-frequency heating inductor. a heat-resistant separator plate, and the brazing foil mounting apparatus for mounting a wax foil brazing position that perpendicularly abutting one another in the axial side flat conductor and the circumferential length side rectangular conductor constituting the rotor coil, in the row foil mounting device A positioning and holding mechanism that positions and holds the axial length side rectangular conductor and the circumferential length side rectangular conductor with the brazing foil attached to each other with the brazing foil, and the bonding position is on the insulating / heat-resistant separating plate; A brazing rod placement device that places brazing rods at the joining position of the brazing foils positioned and held by the positioning and holding mechanism, and a position where the axial length side rectangular conductor and the circumferential length side rectangular conductor are close to each other. A pressing mechanism that presses from the temperature, temperature measuring means for measuring the temperature of the brazing foil joining position of the axial length side rectangular conductor and the circumferential length side rectangular conductor, and the high frequency heating to which temperature information measured by the temperature measuring means is input A brazing device for a rotor coil, comprising: a high frequency heating power source control means for supplying high frequency power to an inductor body.   The forced air cooling means for forcibly cooling the brazed portion after brazing the butting positions of the axial length side rectangular conductor and the circumferential length side rectangular conductor is provided. The brazing apparatus for a rotor coil according to one. The forced air cooling means includes a gas nozzle mechanism that forcibly air-cools the brazed portion immediately after the brazing is completed at the brazed portion of the axial length side rectangular conductor and the circumferential length side rectangular conductor at the brazed position. b c with apparatus of the rotor coil according to claim 3, characterized in.   The high-frequency heating inductor has the high-frequency heating inductor main body placed in an insulating resin glass casing with the laminated core facing the upper surface, and is poured and solidified by pouring insulation / heat-resistant plaster, and then the laminated core. The brazing device for a rotor coil according to any one of claims 1 to 4, characterized in that the upper surface facing the surface is finished to a flat surface.   The insulating / heat-resistant separating plate is formed of a ceramic flat plate that can be in close contact with the flat surface of the high-frequency heating inductor and that has an opening at the brazed position of the long axial rectangular conductor and the peripheral long rectangular conductor. The brazing device for a rotor coil according to any one of claims 1 to 5. The row foil mounting device is configured to attach the U-shaped brazing foil formed separately U-shaped cross-section in the brazing position that perpendicularly abutting one another in the axial side flat conductor and the circumferential length side flat conductor 7. The brazing device for a rotor coil according to claim 1, wherein the brazing device is a rotor coil.   The brazing foil mounting apparatus includes a cartridge that holds a large number of the U-shaped brazing foils, a pushing jig that pushes out the U-shaped brazing foil at the bottom of the cartridge, and a U-shape that is pushed out by the pushing jig. The U-shaped brazing foil is loaded and held with the open end face of the U-shaped brazing foil facing outside while pushing up the holding weight having the inclined guide surface at the receiving position, and the held U-shaped brazing foil is A brazing foil moving mounting mechanism for moving to a brazing position of the axial long side rectangular conductor and the circumferential long side rectangular conductor and mounting to the axial long side rectangular conductor and the circumferential long side rectangular conductor is provided. Item 8. A brazing device for a rotor coil according to Item 7.   The high frequency heating power source control means receives the temperature information detected by the temperature measuring means as feedback information, and controls the high frequency power supplied to the high frequency heating inductor based on the deviation between the feedback information and the target temperature information. Determining whether the temperature information measured by the temperature measuring means is within a set temperature range, and issuing an alarm when the temperature information is outside the temperature range; and an allowable upper limit temperature of the temperature range. Characterized in that it comprises high-frequency power stopping means for stopping supply of high-frequency power when the heating temperature is maintained for a predetermined time and control history storage means for receiving control information of the high-frequency power control means. The brazing device for a rotor coil according to any one of claims 1 to 8.   The high frequency heating power source control means and the temperature measurement means have reached an allowable lower limit temperature of a temperature range in which temperature information for brazing the brazing positions of the axial length side rectangular conductor and the circumferential length side rectangular conductor is set. The brazing device for a rotor coil according to any one of claims 1 to 9, wherein the brazing temperature is maintained from a time point to a predetermined brazing holding time. The positioning holding mechanism is a positioning jig provided at a position away from the brazing position for positioning the axial length side rectangular conductor and the circumferential length side rectangular conductor so as to make a right angle with each other so as to make a right angle. A fixed chuck mechanism for simultaneously holding the side surface portion and the top surface portion of the shaft length side rectangular conductor and the circumferential length side rectangular conductor positioned by the positioning jig, and the shaft length side rectangular conductor whose brazing position is the side surface portion; 11. The pressing mechanism according to claim 1, further comprising: a pressing mechanism that presses the side surface opposite to the brazing position of the circumferential long side rectangular conductor to allow thermal expansion. Rotor coil brazing device. In a brazing method of a rotor coil that brazes a pair of axially long side rectangular conductors and a pair of circumferentially long side rectangular conductors that constitute a rotor coil provided in a rotor of an electric device,
A step of mounting a b c foil brazing position of the axial length side flat conductor and the circumferential length side rectangular conductor, the pre-km c axis length side flat conductor mounting the foil and the circumferential length side rectangular conductor, mutual b The foil is joined and positioned and held so that the joining position is on the insulating / heat-resistant separator disposed on the high-frequency heating inductor having the high-frequency heating inductor body having the laminated core and the water-cooled conductive pipe , A step of pressing the vicinity of the bonding position from above with a pressing mechanism, and a step of controlling and heating high-frequency power supplied to the high-frequency heating inductor body while detecting the temperature at the brazing position. A method for brazing a rotor coil. In a brazing method of a rotor coil that brazes a pair of axially long side rectangular conductors and a pair of circumferentially long side rectangular conductors that constitute a rotor coil provided in a rotor of an electric device,
A step of mounting a b c foil brazing position of the axial length side flat conductor and the circumferential length side rectangular conductor, the pre-km c axis length side flat conductor mounting the foil and the circumferential length side rectangular conductor, mutual b The foil is joined and positioned and held so that the joining position is on the insulating / heat-resistant separator disposed on the high-frequency heating inductor having the high-frequency heating inductor body having the laminated core and the water-cooled conductive pipe , wherein the step of pressing the vicinity of the upward pressing mechanism of the bonding position, the steps of placing a brazing rod joining position of mutual b c foils positioned and held, while detecting the temperature at the braze location A method of brazing a rotor coil, comprising: heating by controlling high-frequency power supplied to a high-frequency heating inductor body. In a brazing method of a rotor coil that brazes a pair of axially long side rectangular conductors and a pair of circumferentially long side rectangular conductors that constitute a rotor coil provided in a rotor of an electric device,
A step of mounting a b c foil brazing position of the axial length side flat conductor and the circumferential length side rectangular conductor, the pre-km c axis length side flat conductor mounting the foil and the circumferential length side rectangular conductor, mutual b The foil is joined and positioned and held so that the joining position is on the insulating / heat-resistant separator disposed on the high-frequency heating inductor having the high-frequency heating inductor body having the laminated core and the water-cooled conductive pipe , A step of pressing the vicinity of the joining position from above with a pressing mechanism, a step of heating by controlling the high-frequency power supplied to the high-frequency heating inductor body while detecting the temperature at the brazing position, and immediately after the end of brazing And immediately forcibly air-cooling the brazing portion. In a brazing method of a rotor coil that brazes a pair of axially long side rectangular conductors and a pair of circumferentially long side rectangular conductors that constitute a rotor coil provided in a rotor of an electric device,
A step of mounting a b c foil brazing position of the axial length side flat conductor and the circumferential length side rectangular conductor, the pre-km c axis length side flat conductor mounting the foil and the circumferential length side rectangular conductor, mutual b The foil is joined and positioned and held so that the joining position is on the insulating / heat-resistant separator disposed on the high-frequency heating inductor having the high-frequency heating inductor body having the laminated core and the water-cooled conductive pipe , wherein the step of pressing the vicinity of the upward pressing mechanism of the bonding position, the steps of placing a brazing rod joining position of mutual b c foils positioned and held, while detecting the temperature at the braze location A rotor coil comprising: a step of heating by controlling high-frequency power supplied to a high-frequency heating inductor body; and a step of forcibly air-cooling the brazed portion immediately after the end of brazing. Brazing method. 16. The brazing foil attached to the brazing position of the long shaft rectangular conductor and the long rectangular conductor is a U-shaped brazing foil having a U-shaped cross section. The method for brazing a rotor coil according to any one of the above.

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