JP2002151339A - Laminated iron core manufacturing method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an iron core manufacturing method and a device, with which punching process and fixing process are markedly improved in workability. SOLUTION: An electromagnetic steel plate is formed into unit iron cores of a prescribed shape through punching, and the unit iron cores are laminated and bonded together through a process, that comprises a first step (1) of punching a prescribed shape out of a steel plate by the use of a punching die, a second step (2) of laminating the punched unit iron cores of a prescribed shape, a third step (3) of applying an adhesive agent on the surface or edge face of the steel plate (unit iron core); during or after the unit iron cores have been laminated, and a fourth step (4) of forming the laminated iron cores in one piece.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a laminated iron core such as a motor and a transformer.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a laminated iron core such as a motor or a transformer using an electromagnetic steel sheet, a steel sheet is made into a unit iron core by punching, a predetermined number of unit iron cores are laminated, and bolting is performed. It is common to fix using caulking, welding, or other means such as an adhesive or varnish. After being fixed, the laminated iron core is subjected to processing such as installation of a winding coil, and the iron core of a transformer or a motor is assembled.

[0003] When the laminated iron core is weakly fixed, the efficiency of the coil winding work is reduced if the laminated iron core is loosened or a gap is opened, and in the case of a motor, noise or vibration is caused. The iron core must be firmly fixed. However, when fixing by bolting, it is necessary to provide a through hole for passing the bolt in the laminated iron core, and if a through hole is provided in the laminated iron core, the magnetic characteristics of the laminated iron core will be deteriorated. Similarly, when the laminated iron core is fixed by welding, thermal distortion is caused in the welded portion, and in caulking, the magnetic properties of the laminated iron core may be deteriorated due to machining during dowel formation.

When the laminated iron core is fixed using an adhesive, a steel sheet is processed into an iron core shape, laminated, temporarily fixed with a clamp or the like, and then immersed in a bath containing an adhesive or varnish. The adhesive or varnish is penetrated by utilizing the capillary phenomenon between the steel sheets by dropping the liquid adhesive from above, and then fixed by heating, etc. It does not penetrate the entire surface, especially in the case of a motor stator, where only the outer peripheral end of the iron core where the adhesive has penetrated adheres, the inner peripheral teeth become free, and both ends of the laminate rise. In addition, when heated, the viscosity of the adhesive or varnish becomes too low, so that excess adhesive or varnish flows out, and the fixing strength is lowered. In addition, it takes a long time to perform the impregnation with the adhesive or the varnish until it is fixed after the application, so that the workability is low.

In order to solve such a problem, Japanese Patent Application Laid-Open No. 57-3560 discloses a method of completely impregnating a laminated iron core.
After attaching a hardening agent or a hardening agent and a hardening accelerator of the insulating agent to the steel sheet constituting the laminated iron core in advance, laminating,
A method of winding and then impregnating is disclosed. This is because when the laminated iron core is fixed by impregnation, the impregnating resin is rapidly cured by attaching a curing agent in advance, thereby preventing the flow of the adhesive and firmly fixing the steel plates to each other. At the same time, insulation is also ensured.

[0006]

However, even in this method, it is necessary to apply the adhesive to each steel sheet constituting the laminated iron core, and although the time required for fixing can be shortened, the unit iron core is formed by punching or the like. However, it cannot be said that the problem that the workability from processing into a fixed iron core to fixing the laminated iron core is low has been solved. Further, there is no disclosure that there is no necessity of full impregnation and that a case where the laminated iron core is to be partially fixed is dealt with. The present invention solves the problem of fixing a laminated iron core using such an adhesive, and provides a method capable of obtaining a laminated iron core with good workability, and an apparatus suitable for the method. .

[0007]

The gist of the present invention is as follows. (1) A magnetic steel sheet is punched into a predetermined shape as a unit iron core,
In the method of manufacturing a laminated iron core that integrates the laminated iron cores by laminating and fixing the punched unit iron cores, after the unit iron cores are punched, adhere to a partial surface or end surface of the unit iron cores during lamination A method for producing a laminated iron core, characterized by applying an agent. (2) The method for producing a laminated iron core according to the above (1), wherein a pressure is applied to the laminated iron core when the laminated iron core is fixed. (3) The laminated iron core is integrated by applying a thermosetting adhesive from an end face during lamination of the united iron core, heating the laminated iron core to a predetermined temperature, and applying pressure. 3. The method for producing a laminated iron core according to 1) or 2. (4) Immediately after the punching process, a thermosetting adhesive is applied to a partial surface of the unit core, the unit cores coated with the thermosetting adhesive are laminated, and the laminated core is heated to a predetermined temperature. The method for producing a laminated iron core according to the above (1) or (2), wherein the laminated iron core is integrated by applying pressure. (5) The method for producing a laminated iron core according to any one of the above (1) to (4), wherein a lateral pressure is applied to the iron core from a direction perpendicular to the laminating direction when the unit iron cores are laminated. (6) A punching section having a male punching die and a female punching die is provided, and a unitary iron core laminated portion for laminating the punched unitary iron cores is separately provided, and an adhesive is provided for the unitary iron core. An apparatus for manufacturing a laminated iron core, characterized in that an adhesive supply section for applying to a partial surface or an end face of the above is provided to integrate the laminated unit iron cores. (7) The apparatus for manufacturing a laminated iron core according to the above (6), wherein a pressurizing mechanism is provided in the unit iron core laminated portion. (8) The apparatus for manufacturing a laminated iron core according to any one of the above (6) to (7), wherein a pressurizing and heating mechanism is provided in the unit core laminated portion. (9) The apparatus for producing a laminated iron core according to any one of the above (6) to (8), wherein the unit iron core laminated section is provided with an adhesive supply section for applying an adhesive to an end face of the laminate. (10) An adhesive supply unit for applying an adhesive to a partial surface of the unit core at the same time as punching into the unit core is installed in the punching unit processing unit. An apparatus for manufacturing a laminated iron core according to any one of the above. (11) Before having a damper mechanism for applying a side pressure to the iron core laminated on the unitary iron core laminated portion, (6)
The apparatus for manufacturing a laminated iron core according to any one of (1) to (10). In the present invention, two or more unit core lamination parts are provided,
After a predetermined number of sheets are stacked, an exchanging device for immediately exchanging the laminated portions is provided, and a unit for discharging the unitary iron core is provided, thereby enabling continuous punching and fixing.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
In the present invention, the magnetic steel sheet provided for the laminated iron core may be a non-oriented magnetic steel sheet or a directional magnetic steel sheet, and a general steel sheet may be used as the magnetic steel sheet. Further, a high Si material or an amorphous alloy can be used.
Although it is suitable for use of a thin steel plate having a thickness of 0 to 0.35 mm, a material having a normal thickness is not limited.

For processing the unit iron core in the present invention, a device for punching a steel sheet into a unit iron core shape by a punching die is required. When the unit iron cores are continuously laminated on the laminated portion, the iron cores are fixed by applying an adhesive to the surface of the steel sheet or the laminated end surface.

Although the adhesive used in the present invention is not particularly limited, acrylic resin adhesive, cyanoacrylate adhesive, epoxy resin adhesive, polyester adhesive, polyurethane adhesive, melamine resin adhesive, phenol Various adhesives such as a resin adhesive can be used. As a more suitable material, a thermosetting organic resin adhesive in which a chemical reaction proceeds by heating is suitable, and specifically, one or more of epoxy resin, phenol resin, urethane resin, melamine resin, and the like. Is an adhesive mainly composed of Further, those obtained by adding a crosslinking agent to polyester, acrylic resin, or the like to impart thermosetting properties are also suitable. In addition, an inorganic adhesive that cures by the progress of a dehydration condensation reaction by heating, or a room temperature-curable inorganic adhesive containing calcium phosphate or the like as a main component may be used.

In the case of heating in the present invention, the heating means to be used include electric heating, induction heating, dielectric heating, electromagnetic wave irradiation,
Direct contact heating or the like can be used and is not particularly limited, but direct contact heating with an electric heater is simple and preferable. In the present invention, the adhesive applied to the laminated iron core can be quickly cured by heating by installing the heating device in the laminated portion and heating.

Next, as a method of applying pressure for fixing the iron core, a pressure punch is used in the present invention, but the pressure punch can be used also as a male die of a punching die. In this case, it is possible to apply a large pressure to the laminated iron core by making the male type stroke larger than the normal punching stroke when the predetermined number of punched sheets is reached, and it is possible to further increase the fixing strength. it can. Also,
In order to further strengthen the adhered laminated iron core, pressure heating may be performed again after this step.

In the present invention, as a method of applying the adhesive, a method of applying the adhesive to the surface of the steel sheet one by one before laminating may be used, or a method of applying from the end face after laminating may be used. When applying an adhesive to the steel sheet surface one by one, adhesive can be applied without deteriorating workability by providing an adhesive application die inside the male or female punching die or inside the pressure punch. It is possible to apply an agent. When the adhesive is applied from the end face, the teeth discharge portion is fixed so as to oppose the inner peripheral portion of the laminated iron core, especially in the case of a motor stator core, to fix each tooth portion. It is possible.

The present invention is characterized in that the adhesive is applied and fixed. The partial surface as referred to in the present invention is an internal partial surface, and refers to a portion where the steel sheet surface enters the vicinity of the center from the outer edge and the inner edge of the iron core surface when the adhesive is applied, and partially close to the center. Apply to. That is, EI
In the case of a core, it is desirable to apply a point-like coating to portions that are approximately equidistant when entering the inside from both ends of the linear portion.

Further, the term "end face" as used in the present invention refers to the case where the coating is applied from both or one of the outer and inner end faces, and in the case of a motor core, from the outer and inner circumferential sides of the core back portion. When the teeth portion is fixed, it is better to be away from the teeth side in order to balance the fixing portion when entering the inside. It is not necessary that each fixing portion is entirely separated from the end portion, and the fixing portion may be fixed from the end portion of the iron core to the vicinity of the center.

[0016] In the case of an EI core,
About 3 to 6 points for the core, about 2 to 3 points for the I-core, and 4 to 12 points for the core of the motor stator.
In this respect, it is desirable to apply the coating to each tooth portion, and it is preferable to use about 2 to 10 points for the rotor.

When the adhesive is applied from the end face of the laminate, E
In the case of an I-core, the outer peripheral part is about 4 to 10 points, in the case of a motor stator, the outer peripheral part is about 4 to 12 points, and the inner peripheral teeth side is every other tooth or every other tooth. It is preferable to apply the coating continuously about six points from the point in the laminating direction.

In the present invention, the adhesive may be applied from the laminated end face of the laminated iron core. However, instead of fixing the end of the iron core, the part which has entered the inner side is partially adhered. is there.

FIG. 3 shows a state in which an adhesive is applied to the surface of the steel sheet of the E core. The shaded portion is the portion where the adhesive is applied. The spread state of the adhesive varies depending on various factors such as the viscosity of the adhesive used, the amount of adhesion, and the familiarity with the steel sheet.
In the case of a core, one to two places are adhered to each linear portion.

FIG. 4 shows the stator core of the motor shown in FIG.
2 shows a state in which an adhesive is applied using the apparatus of FIG. When an adhesive is applied to the tip of each tooth and four places of the core back from the laminated end face, the adhesive flows between the unit iron cores by capillary action and spreads on the surface of the iron cores.

FIG. 5 shows an example of a state in which the E core is fixed by a conventional technique. Soak the stack in the top and bottom, clamped from the top and bottom, soak it in a bath filled with epoxy adhesive, impregnate it, take it out, heat it to 150 ° C in an oven, divide it, and show the adhesion status of the adhesive It is a thing. Since the adhesive was clamped, it adhered only to the end of the unit iron core surface. There are some parts that adhere well and some parts that do not, with large variations.

FIG. 6 shows an example of a state in which a stator core of a motor is fixed by a conventional technique. Insert a cylinder that matches the inner diameter of the stator into the iron core so that the stacking does not shift, press down with a holding jig in the stacking direction, apply the adhesive by dripping the adhesive on the outer periphery of the iron core, and spray hot air with a drier to bond. It divides and shows the adhesion state. Since the adhesive is adhered only to the end of the outer peripheral portion, the adhesive does not adhere to each of the teeth portions and is in a free state.

Further, in the present invention, it is possible to use together with another fixing method. In the case of a motor stator, the outer peripheral portion can be fixed by caulking, and the inner peripheral teeth can be fixed by using an adhesive.

In the present invention, when heating, a heat insulating member can be provided between the punching die and the heating device. The temperature required for curing the organic resin-based thermosetting adhesive is generally 150 to 2
Between 50 ° C. and 400-7 for inorganic adhesives
Although the temperature is 00 ° C., very high precision is required for the punching die, so that it is necessary to prevent heat from being transmitted to the heated portion by a heat insulating member so that the die does not expand. The heat insulating member used here is desirably one having high heat resistance such as ceramics, but is not particularly limited.

In the present invention, when heating is necessary, the laminated iron core is heated to a predetermined temperature by a heating device installed adjacent to the laminating part after or while the predetermined number of unit iron cores are being laminated. Warm up. At this time, it is possible to align the end faces of the laminated iron cores from the side surfaces of the laminated or partially laminated unit iron cores by using a lateral pressure device provided with a damper mechanism.

Further, in the present invention, the efficiency can be further improved by providing two or more lamination parts and installing the lamination part movable device so that these can be alternately arranged immediately after the punching part. After the lamination is completed or each time the unit core is supplied, pressure is applied by a pressurizing device to cure the adhesive, and the laminated unit cores are completely or partially bonded to fix the cores. The arrangement of the laminated portions is not limited to a method of moving the laminated portions in a direction perpendicular to the supply direction of the steel sheet, but may be a rotating method in which a large number of laminated portions are arranged in a circle, or another method may be used. Further, when the unit iron cores are stacked and then moved from a position immediately after the punching unit, the unit can be pressurized again by the pressurizing device to further firmly adhere.

An example of the structure of an apparatus suitable for the method of manufacturing an iron core according to the present invention will be described below. A punching unit having a male punching die and a female punching die, a unitary iron core laminating unit for laminating the punched unitary iron cores is provided separately, and the adhesive is punched out of the unitary iron. The provision of the adhesive supply unit applied to the partial surface or the end surface of the core makes it possible to integrate the laminated unit iron cores.
Regarding the supply part of the adhesive, when the adhesive is applied to the end face of the laminated part of the unit iron core, when the unit is partially applied to the surface of the unit iron core, the bonding part is provided in the punching part. Is preferred.

Further, when the unit iron core is firmly fixed, it is possible to provide a pressing mechanism in the unit iron core laminated portion. As the pressing mechanism, a pressing punch or a pressing punch may be used as a male die of a punching die. Furthermore, when a thermosetting adhesive is used, a heating mechanism can be provided in the unitary iron core laminated portion in addition to the above-described pressurization. Examples of the heating mechanism include energization heating, induction heating, dielectric heating, electromagnetic wave irradiation, and direct contact heating.

Further, a side pressure device having a damper mechanism is provided so that the end surfaces of the laminated iron cores can be aligned from the side surfaces of the laminated or partially laminated unit iron cores in the unitary iron core laminated portion. It is also possible to use. Further, in the present invention, it is also possible to provide a laminate moving device so that two or more laminates are provided and these can be alternately arranged immediately after the punching unit. This makes it possible to further increase the efficiency.

[0030]

Embodiment 1 FIG. 1 shows an embodiment of the present invention.
The magnetic steel sheet 1 is punched into the unit iron core shape of the motor core,
FIG. 3 is a cross-sectional explanatory view showing a state in which a thermosetting adhesive is applied to the surface of a punched steel sheet, and then laminated, heated and pressed, and fixed.
In the figure, 1 is an electromagnetic steel plate (supply member), 2 is a male die for punching the inner periphery when punching a unit iron core from the supply member 1, 4
Is a female die for punching the inner periphery provided opposite the die 2. Reference numeral 6 denotes a male die for punching the outer periphery of the unit iron core, which also serves as a pressure punch. Reference numeral 10 denotes a female die for punching the outer peripheral circumference, which is provided to face the male die and pressure punch 6;
A two-stage punched portion is formed with these dies.

The adhesive supply device includes a male mold 3 and a female mold 5 of an adhesive application mold, an adhesive supply tank 14 and an adhesive supply pipe 13. With these, a thermosetting adhesive is applied to the surface of the steel sheet. For example, it is dropped on the steel plate surface of the motor core corresponding to the bonding position as shown in FIG. 11
Is a mold stand, 12 is a heating device receiving stand, 9 is a heating device, 8 is a laminated iron core, 7 is a pressure punch receiving stand, and 15 is a fixed laminated iron core receiving stand. A laminating part is constituted in combination with the mold / pressure punch 6.

Electromagnetic steel sheet 1 wound into a coil
Is continuously fed into the apparatus of the present invention by a feeder as a supply member. After the inner peripheral side is punched by the die 2 and the female die 4 of the punching die, a thermosetting adhesive is applied to the steel sheet surface by the male die 3 and the female die 5 of the adhesive application die.
The thermosetting adhesive is supplied from the adhesive supply tank 14 through the supply pipe 13 to the male mold 3 of the adhesive application mold. Next, in a state where the adhesive is applied to the surface portion of the steel sheet serving as the unit iron core, the sheet is fed to the outer periphery punching die and pressurizing punch 6 according to the feed of the electromagnetic steel sheet 1. It is punched by the outer peripheral side punching die combined use pressure punch 6 and the outer peripheral punching die female die 10 and is laminated on the laminated iron core receiving table 7 inside the laminating apparatus.

The laminated iron core 8 is heated from the side by the heating device 9 and is heated to a temperature of 150 ° C. at which the thermosetting adhesive is cured. At the separated portion 16 of the laminated iron core, the thermosetting adhesive is not applied due to the intermittent operation of the male mold 3 of the adhesive application mold. When the press punch receiving stand 7 descends to a predetermined position, the laminated iron core 8 is sent out to the fixed laminated iron core receiving stand 15.

Embodiment 2 FIG. 2 shows another embodiment of the present invention, in which the electromagnetic steel plate 17 is punched into a unit iron core shape on a unit iron core shape of a motor core, and the punched unit iron cores are laminated. Thereafter, a cross-sectional explanatory view showing a state in which a thermosetting adhesive is applied from the end face, and is fixed by heating and pressing is shown.

In the figure, reference numeral 17 denotes an electromagnetic steel plate (supply member), 18 denotes a male die for punching a guide hole when punching a guide hole from the supply member 17, and 21 denotes a guide hole punch provided to face the die 18. This is a female mold for the mold. Reference numeral 19 denotes a male die for punching the inner circumference when the unit iron core is punched from the supply member 17, and reference numeral 21 denotes a female die for punching the inner circumference provided to face the die 19. Reference numeral 20 denotes a male mold for forming a convex portion for separating a laminated iron core, and reference numeral 23 denotes a female mold for forming a convex portion provided to face the mold 20. The male male part 20 and the female female part forming mold 23 are configured to intermittently operate at predetermined intervals. Reference numeral 25 denotes a male die for punching the outer periphery of the unit iron core, which also serves as a pressure punch. Reference numeral 32 denotes a female die for punching on the outer periphery, which is provided to face the male die and pressurizing punch 25. A two-stage punched portion is formed by the above-mentioned mold.

The adhesive supply device is provided in parallel with the male mold and pressurizing punch 25, and comprises an adhesive supply tank 29, an adhesive supply pipe 28, and an adhesive discharge section 27. The adhesive discharge section 27 is located at a position lower than the male mold and pressurizing punch 25, and is set so as to move up and down in synchronization with the male mold and pressurizing punch 25. With these, a thermosetting adhesive is applied to the laminated end face. The position where the adhesive is applied is, for example, applied to a portion corresponding to the bonding portion of the unit iron core shown in FIG. 24 is a mold stand, 35 is a laminated iron core side pressure receiving stand, 3
Reference numeral 1 denotes a heating device, reference numeral 30 denotes a laminated iron core, reference numeral 33 denotes a heat insulating member, and these are combined with the above-mentioned male mold and pressurizing punch 25 to constitute a laminated portion.

Electromagnetic steel sheet 1 wound into a coil
7 is continuously fed into the apparatus of the present invention by a feeding device as a supply member. After a guide hole is provided by the male die 18 and the female die 21 of the die for punching a guide hole, the inner peripheral side is punched by the male die 19 and the female die 22 of the inner peripheral punching die. At this time, a predetermined position of the supply member is punched out so that the adhesive discharge portion for bonding the outer peripheral end face can pass through. The male mold 20 and the female mold 23 of the protrusion forming mold for separating the laminated iron core are operated intermittently every predetermined number. The thermosetting adhesive is supplied from the adhesive supply tank 29 through the supply pipe 28 to the adhesive discharge section 27.
Supplied to

The unit iron core separated from the supply member 17 by the peripheral punching die and pressurizing punch 25 is laminated inside the female die 32 of the peripheral punching die. The adhesive discharge section 27 is installed at a position lower than the outer peripheral punching die and pressurizing punch 25, and descends in synchronization with the outer peripheral punching die and pressurizing punch 25 when punching the outer peripheral side, and is laminated. A thermosetting adhesive is applied from both outer and inner end surfaces of the iron core 30. The laminated iron core 30 is heated from the side surface by the heating device 31, and is heated up to 150 ° C. at which the thermosetting adhesive is cured.
When the laminated iron core 30 descends to a predetermined position below the press-punch side pressure receiving base 35, it is sent out from the apparatus.

[0039]

According to the present invention, it is possible to continuously fix the iron core in the step of punching the laminated iron core using the adhesive, and it is not the fixing using the conventional impregnation equipment. The laminated iron core can be fixed in a short time, and the workability of the laminated iron core fixing step is greatly improved. In addition, since the steel sheet is kept horizontal during the application of the adhesive, it is possible to prevent the adhesive from flowing out, and it is possible to firmly fix the adhesive.

[Brief description of the drawings]

FIG. 1 shows a state in which a hoop-shaped non-oriented electrical steel sheet is punched into a unit iron core shape, an adhesive is applied to the steel sheet surface for each unit iron core, and the laminate is pressurized and heated to be fixed. Show.

FIG. 2 shows a state in which a hoop-shaped non-oriented electrical steel sheet is punched into a unit iron core shape, adhesive is applied to the teeth and the core back portion while being laminated at the laminating portion, and adhesively applied to the teeth portion and the core back portion, and then heated and fixed. Is shown.

FIG. 3 is a unit iron core in a state where an adhesive is applied to an E core of the EI core. The shaded area is where the adhesive is applied. The state where the adhesive was applied to the surface of the steel plate at five places is shown.

FIG. 4 is a unit iron core in a state where an adhesive is applied using the apparatus of FIG. 2; The shaded area is where the adhesive is applied. The state in which the adhesive is applied from the end portions of the teeth portion and the four peripheral portions of the core back is shown.

FIG. 5 is a unit iron core in a state where an adhesive is applied to an E core of an EI core using a conventional technique. The shaded portion indicates the portion where the adhesive is applied.

FIG. 6 is a unit iron core in a state where an adhesive is applied using a conventional technique. The shaded portion indicates the portion to which the adhesive has been applied.

[Explanation of symbols]

1, 17: hoop-shaped electromagnetic steel sheet 2, 19: male die of inner peripheral punching die 3: male die of adhesive-coated die 4, 22: female die of inner peripheral punching die 5: adhesive supply die Female mold 6,25: Press punch for combined use of outer peripheral punching die 7: Pressure punch receiving stand 8,30: Laminated iron core 9,31: Heating device 10,32: Female die for outer peripheral punching die 11,24 : Mold stand 12: Heating device receiving stand 13: Adhesive supply pipe 14: Adhesive supply tank 15: Receiving base for fixed laminated iron core 16, 34: Separated part of each laminated iron core 18: Punching of guide hole Male mold 20: Male mold for forming a convex portion for separating a laminated iron core 21: Female mold for punching a punched hole 23: Female mold for forming a convex portion for separating a laminated iron core 26: Spring for pressure punch 27: adhesive discharge section 28: adhesive supply pipe 29: adhesive supply tank 33: heat insulating member 35: Laminated iron core side pressure receiving base 36: Separated laminated iron core

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme court ゛ (Reference) // H02K 15/02 H01F 27/24 QA (72) Inventor Norihito Abe 1 Fujimachi, Hirohata-ku, Himeji-shi F-term in Nippon Steel Corporation Hirohata Works (reference) 5E062 AA06 AC06 AC11 AC15 5H615 AA01 BB01 PP01 PP06 SS03 SS05 SS18 TT31 TT34 TT36 TT38

Claims (11)

[Claims] 1. A method for manufacturing a laminated iron core, comprising: forming an electromagnetic steel sheet into a unitary iron core punched into a predetermined shape; laminating the punched unit iron cores; A method of manufacturing a laminated iron core, comprising applying an adhesive from a partial surface or an end surface of a unit iron core during lamination after punching of the core. 2. The method for producing a laminated iron core according to claim 1, wherein a pressure is applied to the laminated iron core when the laminated iron core is fixed. 3. A method in which a thermosetting adhesive is applied from the end face during the lamination of the unit cores, and the laminated cores are heated to a predetermined temperature and pressurized to integrate the laminated cores. The method for producing a laminated iron core according to claim 1. 4. Immediately after the punching process, a thermosetting adhesive is applied to a partial surface of the unit core, the unit cores coated with the thermosetting adhesive are laminated, and the laminated core is heated to a predetermined temperature. And
3. The method for producing a laminated iron core according to claim 1, wherein the laminated iron core is integrated by applying pressure. 5. The method according to claim 1, wherein lateral pressure is applied to the iron core from a direction perpendicular to the laminating direction when the unit iron core is laminated.
The method for producing a laminated iron core according to any one of claims 1 to 4. 6. A punching section having a male punching die and a female punching die, and a unitary iron core laminated portion for laminating the punched unitary iron cores is separately provided, and an adhesive is used as a unit. An apparatus for manufacturing a laminated iron core, comprising a unitary iron core laminated by providing an adhesive supply part for applying to a partial surface or an end surface of the iron core. 7. The apparatus for manufacturing a laminated iron core according to claim 6, wherein a pressurizing mechanism is provided in the unit core laminated portion. 8. The apparatus for manufacturing a laminated iron core according to claim 6, wherein a pressurizing and heating mechanism is provided in the unit core laminated section. 9. The apparatus for manufacturing a laminated iron core according to claim 6, wherein an adhesive supply section for applying an adhesive to an end face of the laminate is provided in the unit core laminated section. . 10. An apparatus according to claim 6, wherein an adhesive supply unit for applying an adhesive to a partial surface of the unit iron core at the same time as punching the unit iron core is provided in the punching unit processing unit. 2. The apparatus for manufacturing a laminated iron core according to claim 1. 11. The apparatus for manufacturing a laminated iron core according to claim 6, further comprising a damper mechanism for applying a side pressure to the iron core laminated on the unit iron core laminated portion.