JP2015123458A - Reflare machining device of heat exchanger fin, heat exchanger fin and heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflare machining device which has a relief hole on the lower side of a reflare punch and to provide a fin manufacturing apparatus containing the reflare machining device, of which the operability is improved.SOLUTION: A reflare working device of a heat exchanger fin includes an upper die 60 provided with a reflare punch 61 and a lower die 70. The lower die 70 includes a die bush 71 having a pore part 71a to which a tip part 61b of the reflare punch 61 can be inserted, a die plate 72 which retains the die bush 71 and an expelling pin 73 which expels chips of metallic thin plate P put into the hole part 71a of the die bush 71. Further, the lower die 70 includes a packing plate 74 which slidably retains the expelling pin 73 in the vertical direction and regulates movement to a lower part of the die bush 71, a spring member 75 which presses a lower surface of the expelling pin 73 to the upper side and an embedded block 76 which fastens the spring member 75.

Description

  TECHNICAL FIELD The present invention relates to a heat exchanger fin re-flare processing apparatus, a fin manufactured by the processing apparatus, and a heat exchanger using the fin.

  A cooling fin used in a heat radiating part of a heat exchanger such as an automobile cooler or a room air conditioner has a plurality of collared through holes in a metal plate such as a rectangular aluminum thin plate. The heat dissipating part of the heat exchanger formed by such fins is superposed so that a large number of fins match each of the collared through holes, and heat transfer tubes are inserted into these through holes and integrated. .

  Such fins are manufactured by the method described in Patent Document 1, for example. In the method described in Patent Document 1, as shown in FIG. 7, a flared punch 202 is incorporated in an upper mold stage 201, and a metal thin plate 204 that has been subjected to an ironing process is transferred onto the lower mold stage 203. The flared portion 205 is formed by the leading end of the flaring punch 202 entering the leading end portion of the collar. The height of the upper surface of the flared portion 205 is adjusted by adjusting the position of the upper surface of the stage with a lifting device (not shown) (for example, a taper jib) installed in the lower mold.

  By the way, since the thing as shown in FIG. 7 does not escape under the reflare punch 202, when there is a malfunction due to the step-out of the motor that operates the taper jib as the lifting device, the lower mold stage 203 There is a possibility that the upper surface position becomes too high and the flared punch 202 collides with the upper surface of the lower mold stage 203. For this purpose, in the actual product, a relief hole is provided in the lower mold.

Japanese Patent Laid-Open No. 5-2000450

  However, in such a flaring processing apparatus having a relief hole, if the feeding amount of the metal thin plate is distorted due to an abnormality of the uncoiler or the pitch feeder, the position of the refractor punch 202 and the color of the metal thin plate 204 to be fed Deviation occurs in the position of the part. For this reason, when a deviation occurs in the feed amount of the metal thin plate 204, chips are generated from the collar portion to be flared, and the chips fall into the escape holes. And the chip | tip which fell to the escape hole may accumulate | store in an escape hole as it is, and may fall on the taper jib which is a raising / lowering device of the escape hole further. In such a state, there is a risk that the vertical movement of the reflare punch 202 may be hindered or the taper jib adjustment function may be affected. Therefore, in such a case, it is necessary to stop and inspect the fin manufacturing apparatus including the flaring process, and there is a possibility that the operating rate of the fin manufacturing apparatus including the refringing apparatus as well as the flaring processing apparatus may be reduced. .

  The present invention has been made in view of such circumstances, and is to improve the operating rate of a flaring processing apparatus having a relief hole below the refracting punch, and thus a fin manufacturing apparatus including the processing apparatus. With the goal.

  The heat exchanger fin reflare processing apparatus that solves this problem includes a reflare punch for processing the reflare portion of the collar portion on the metal thin plate that is the material of the fin for the cross fin tube heat exchanger. An upper die, and a lower die disposed opposite to the upper die, the lower die holding a die bush having a hole that allows the tip of the reflier punch to enter, and the die bush A die plate, a payout pin for paying out chips of the metal thin plate that has entered the hole of the die bush, and holding the payout pin slidable in the vertical direction, and moving the die bush downward. It has a backing plate to be regulated, a spring member that presses the lower surface of the payout pin upward, and an embedding block that fixes the spring member.

  According to such a configuration, the hole of the die bush forms a relief hole for the reflier punch. In addition, when there is an error in the position of the refractor punch and die bush due to some abnormality and the position of the collar portion of the metal thin plate that is sent, the metal thin plate chips may become a hole in the die bush. Even if it is fitted in, the chips are pushed up to the upper surface of the die plate by the dispensing pin when the mold is opened. Therefore, the frequency required for maintenance and inspection of the flaring processing apparatus and the fin manufacturing apparatus including the processing apparatus is reduced, and the operating rate of the flaring processing apparatus, and eventually the fin manufacturing apparatus including the processing apparatus, is improved. be able to.

  The die plate and the backing plate are fixed, and the die bush has a flange portion formed at a lower end thereof restricted to move upward by a stepped hole formed in the die plate. The lower part is formed in a stepped cylindrical shape with a large diameter, and the upper part is incorporated so as to move up and down in the die bush. The backing plate has the lower part of the payout pin in the vertical direction. It has a slidable hole, and the diameter of the hole of the backing plate is smaller than the outer diameter of the flange of the die bush and larger than the inner diameter of the hole of the die bush. Is preferred.

  According to such a configuration, in the mold for reflare processing in which the lower mold is fixed and the upper mold is slid up and down, the die bush and the payout pin are prevented from coming off in the vertical direction by the die plate, the backing plate, and the embedded block. Therefore, the number of parts of the lower mold is reduced.

  It is preferable that the discharging pin is adjusted by the spring member so as to be in an upper surface height position suitable for supporting the lower surface of the collar portion of the metal thin plate to be transferred in the mold open state.

  According to such a configuration, it is possible to avoid a meaningless protrusion of the tip end portion of the payout pin above the die plate. Accordingly, it is possible to avoid the protrusion of the tip end portion of the payout pin, which is a factor that hinders the transfer of the metal thin plate.

  The lower mold has an elevating device installed so as to support the lower surface of the embedded block, and the elevating device moves the embedded block, the backing plate and the die plate up and down integrally to move the die. It is configured to control the height position of the upper surface of the plate, the bottom dead center of the reflare punch is set by the vertical movement stroke of the upper mold, and the height of the reflare part is the upper mold in the mold closed state The dimension between the lower surface of the upper mold and the upper surface of the lower mold is adjusted, and the dimension between the lower surface of the upper mold and the upper surface of the lower mold in the mold closed state is the height of the upper surface of the die plate. The height position of the upper surface of the die plate is adjusted up and down integrally with the embedding block, the backing plate and the die plate by the lifting device. It is preferably configured to adjust to.

  According to such a configuration, the position of the bottom dead center of the reflare punch is set by the vertical movement stroke of the upper mold, and the height position of the collar portion is included in the lower mold for adjusting the upper surface height position of the die plate. It is set by the lifting device. Therefore, since the two setting functions are distributed between the upper mold and the lower mold, it is possible to simplify the mechanism and facilitate the setting work of the flaring processing apparatus.

  The lifting device is a tapered jib having a tapered jib lower member and a tapered jib upper member, and the tapered jib is preferably configured to adjust the height by movement of the tapered jib lower member.

  According to such a configuration, it is possible to apply a tapered jib frequently used as a lifting device. In addition, since the taper jib upper member does not move during height adjustment, the taper jib can stably support the payout pin. Therefore, when the lifting device is operated, there is little influence on the position adjustment of the tip of the payout pin supported by the spring member on the embedded block.

It is preferable that the upper mold has a reflare bush that presses the periphery of the collar portion toward the upper surface of the die plate during reflare processing.
According to such a structure, the deformation | transformation added to a fin by reflaring processing can be suppressed.

Moreover, the fin for heat exchangers which solves the said subject manufactured the reflare part of a color | collar part with the reflare processing apparatus of the said fin for heat exchangers.
According to such a configuration, since the operating rate of the fin manufacturing apparatus including the flaring processing apparatus is improved, an inexpensive heat exchanger fin can be provided.

Moreover, the heat exchanger which solves the said subject uses the fin by which the reflare part of the collar part was manufactured by the said reflare processing apparatus.
According to such a structure, since an inexpensive fin is used, an inexpensive heat exchanger can be provided.

  According to the above-described invention, it is possible to improve the operating rate of the flaring processing apparatus, and eventually the fin manufacturing apparatus including the processing apparatus.

It is drawing of the fin of the cross fin tube type heat exchanger which concerns on embodiment of this invention, Comprising: (a) is a top view, (b) is AA sectional drawing. BRIEF DESCRIPTION OF THE DRAWINGS It is the whole fin manufacturing apparatus schematic of the fin for the heat exchanger, Comprising: The process order is shown. It is the figure showing the formation process of the collar part in the fin for the heat exchanger, (a) is an overhanging process, (b) is a drawing process, (c) is a piercing burring process, (d) is an ironing process. A process and (e) show a reflaring process. It is sectional drawing of the mold open state of the metal mold | die which performs the reflaring process in the formation process of the collar part. It is sectional drawing of the mold closed state of the metal mold | die. It is operation | movement explanatory drawing in the metal mold | die. It is a fragmentary sectional view which shows the state of the conventional reflaring process.

  A specific example of a heat exchanger fin flaring apparatus according to an embodiment of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to the claim are included.

[Description of fins for heat exchangers manufactured by this processing apparatus]
First, a schematic configuration of the heat exchanger fin according to the present embodiment will be described.
As shown to Fig.1 (a), the fin 1 for this heat exchanger is used for heat exchangers, such as an indoor unit of an air conditioner, for example, Comprising: The collar part which penetrates a heat exchanger tube in zigzag form 10 is provided. The collar part 10 is formed in two rows and six stages. A set of four bulging fins (hereinafter referred to as louver fins 20) is formed between the rows of the collar portion 10. A perforated slit 30 is formed between the rows of the collar portions 10.

  As shown in FIG. 1B, the collar portion 10 is formed with a large-diameter, dish-shaped seat portion 11 that forms a small rise, and a vertical cylindrical portion 12 is formed thereon. A flared portion 13 is formed above the vertical cylindrical portion 12. The vertical cylindrical portion 12 is an insertion portion of the heat transfer tube 40 and improves heat transfer between the heat transfer tube 40 and the fins 1. The heat transfer tube 40 is expanded after being inserted into the collar portion 10 formed into a predetermined shape. Thereby, the heat transfer tube 40 is formed so as to be in close contact with the inner surface of the vertical cylindrical portion 12. The seat portion 11 has a guide function when the fins 1 are stacked, and the reflare portion 13 has a function of maintaining a constant pitch when the fins 1 are stacked.

  The louver fin 20 improves the heat transfer coefficient of the fin 1 by the leading edge effect. The louver fin 20 is cut in the step direction and has a shape raised from the base of the fin 1 at both ends in the step direction. The example shown in FIG. 1 is an example of the louver fin 20 and can be replaced with various shapes.

  The perforated slits 30 formed between the rows of the collar portion 10 are notched in the step direction, and are formed so that the fins 1 can be easily divided between the rows. In addition to the slits processed between the rows, in the heat exchanger such as an outdoor coil used as a condenser, between the heat transfer tube 40 on the inlet side and the heat transfer tube 40 on the outlet side. There is an object of promoting the liquefaction and supercooling of the refrigerant by reducing the heat conduction. Moreover, as another slit, in order to simply divide a row | line | column, the slit which continues in a step direction may be formed. The perforated slits 30 in this embodiment can be replaced with these slits.

[Overall outline of fin manufacturing equipment for this heat exchanger]
Next, an outline of a fin manufacturing apparatus for manufacturing such fins will be described.
As shown in FIG. 2, the fin manufacturing apparatus includes an uncoiler 50 in which a thin metal plate P such as aluminum that is a material of the fin 1 is wound in a coil shape. Then, the metal thin plate P is sent from the uncoiler 50 to the press device 52 via the loop controller 51. The press device 52 has a lower mold fixed to the bed and an upper mold fixed to the slide of the press machine. In this fin manufacturing apparatus, since there are a wide variety of processes, it is not possible to accommodate the molds of each process within the length range of the metal thin plate P of one press apparatus 52 in the feed direction. For this reason, in the press device 52, the lower die set 52a that supports the lower die is extended to the lower side in the feed direction. Similarly, the upper die set 52b that supports the upper die is also extended toward the lower side in the feed direction. Note that the overhang member 52c is further extended outward in the feed direction so as to compensate for the lack of the extension dimension of the upper mold. In this embodiment, the shearing device in the final process is held by the overhang member 52c.

  Processing of each process of A to I is performed by one press device 52 configured as described above. As shown in the table in FIG. 2, in step A, the louver fin 20 is processed. In step B to step F, processing of the collar portion 10 is sequentially performed. The metal thin plate P on which the collar portion 10 is formed through the process F is subjected to inter-row slit processing and trimming processing in the process G. In Step H, the entire pitch is fed by pitch feed. The process I is the final process, and a shearing process for cutting the metal thin plate P by a predetermined length is performed. The metal thin plate P is completed as the fin 1 for a heat exchanger with the process I as a final process. Further, the completed fin 1 is accommodated in the stacker 53 disposed at the lower side of the process I. The stacker 53 has a plurality of pins 53 a erected in the vertical direction, and the fins 1 are stacked at a constant pitch by inserting the pins 53 a into the collar portion 10.

  Further, the fin manufacturing apparatus is configured such that each step proceeds simultaneously in a plurality of rows so as to finish a plurality of fins from the metal thin plate P at the same time as in a conventionally known device. It should be noted that the number of fin rows is set depending on the position of the row between successive rows, and fins having different numbers of rows can be processed simultaneously. Further, the number of fins manufactured at the same time is determined by these settings. For example, in the case of the two rows and six stages of fins 1 shown in the figure, the number of sheets produced simultaneously is 20 or more. In the fin manufacturing apparatus according to the present embodiment, a plurality of dies for processing each process are installed in parallel for this purpose.

Here, the processing of the collar portion 10 in Step B to Step F will be specifically described with reference to FIG.
As shown in FIG. 3A, in the process B, an overhanging process for forming the overhang portion 101 is performed. As shown in FIG. 3B, in step C, drawing processing for processing the drawing unit 102 is performed. As shown in FIG. 3C, in step D, a piercing burring process is performed in which the lower hole 103 is formed in the central portion and the burring portion 104 is formed at the same time. In this step D, the seat portion 105 is formed. As shown in FIG. 3D, in step E, an ironing process is performed to form a vertical cylindrical portion 106 having a predetermined inner diameter. As shown in FIG. 3 (e), in step F, a flaring process is performed to form a flared portion at the tip of the vertical cylindrical portion 106. The shape shown in FIG. 3E shows the collar portion 10 that has been completed through the process F. The code in parentheses in this figure indicates the code in the middle of processing. In other words, the collar portion 10 that has undergone the final process includes a seat portion 11, a vertical cylindrical portion 12, and a flared portion 13.

[Explanation of mold for reflaring]
Next, the mold for performing the flaring process in the fin manufacturing apparatus will be described with reference to the mold open state of FIG.

  As shown in FIG. 4, the mold for performing the flaring process includes an upper mold 60 fixed to the upper mold set 52b and a lower mold 70 fixed to the lower mold set 52a in the same manner as the molds in other processes. It consists of and. The upper die set 52b is fixed to a slide (not shown) that moves in the vertical direction, and the lower die set 52a is fixed to a stationary bed. The fin manufacturing apparatus according to the present embodiment processes a plurality of fins 1 at the same time, and a number of molds corresponding to a predetermined number of rows are arranged in parallel. However, in the following description, only one mold will be described in order to simplify the description.

  As shown in FIG. 4, the upper die 60 includes an upper die set 52 b, a reflare punch 61, a punch holder 62 that fixes the reflare punch 61, a reflare bush 63, a bush holder 64 that holds the reflare bush 63, and a bush holder 64. And a spring member 65 for urging the squeezed downward.

  As shown in FIG. 4, the lower mold 70 includes a die bush 71, a die plate 72 that holds the die bush 71, a payout pin 73, a backing plate 74 that supports the die bush 71, a spring member 75 that presses the payout pin 73, An embedding block 76 for fixing the spring member 75 and an elevating device 77 for adjusting the height position of the upper surface of the die plate 72 are provided. These components are mounted on the lower die set 52a. The lower mold 70 includes a guide plate 78, a keeper 79, and the like in addition to these components.

Next, components constituting the upper mold 60 will be specifically described.
The upper die set 52b is a base member to which the upper die 60 is attached. The upper die set 52b is fixed to a slider (not shown) which is a driving body that moves up and down by a shank (not shown).

  As shown in FIG. 4, the flared punch 61 is a substantially cylindrical member having a flange portion 61 a at the upper end portion. On the other hand, the punch holder 62 to which the reflier punch 61 is attached is provided with a stepped hole 62a whose upper portion has a large diameter. The flared punch 61 has the flange portion 61a arranged at the large diameter portion of the stepped hole 62a, so that the upper portion is prevented from coming off by the upper die set 52b, and the lower portion of the reflare punch 61 is stepped by the stepped hole 62a. Regulated by the Department.

As described above, the flared punch 61 is held by the upper mold 60 and is configured to move up and down together with the upper mold 60.
On the other hand, the punch holder 62 is fixed to the upper die set 52b by a shank (not shown). A bush holder 64 to which the refractor bush 63 is attached is fixed to the punch holder 62 with a shank (not shown).

  The flared punch 61 presses the small-diameter tip portion 61b inserted into the vertical cylindrical portion 106 of the collar portion sent from the previous step and the vertical cylindrical portion 106 formed in the previous step, and has a predetermined shape. And a flange 61c for forming the flared portion 13.

  The flared bush 63 is a substantially cylindrical member having a flange portion 63a at the upper end. On the other hand, the bush holder 64 to which the refractor bush 63 is attached is provided with a stepped hole 64a having an upper portion having a large diameter. Further, the reflare bush 63 is assembled such that the flange portion 63a is disposed in the lower portion of the large diameter portion of the stepped hole 64a, and the front end portion 61b of the reflare punch 61 passes through the inside of the reflare bush 63. In the structure assembled in this way, a reflare bush 63 is attached to the cylindrical space formed by the upper surface of the flange portion 63a, the outer peripheral surface of the flared punch 61, and the lower surface of the punch holder 62. A spring member 65 is attached. The spring member 65 adjusts the pressing force that presses the metal thin plate P toward the die plate 72 by the reflare bush 63 in the mold closed state.

  In addition, the tip of the flared bush 63 is formed in a large diameter portion provided with a stepped portion 63 b for forming the flared portion 13 in cooperation with the flange portion 61 c of the flared punch 61. In the assembled state, the step portion 63b has a shape obtained by extending the surface of the hook-shaped flange portion 61c of the reflare punch 61, and complements the processing function of the reflare portion of the reflare punch 61.

Next, the configuration of the lower mold 70 will be specifically described.
The die bush 71 of the lower die 70 has a hole 71a that allows the tip of the flared punch 61 to enter when the upper die 60 is moved downward. The die bush 71 has the hole 71 a, and thus has a function of avoiding the tip of the flared punch 61 from colliding with the upper surface of the lower mold 70. The die bush 71 is held in a stepped hole 72 a formed in the die plate 72. More specifically, the die bush 71 has a flange portion 71b at the lower end, the upper surface of the flange portion 71b abuts on the step portion of the stepped hole 72a formed in the die plate 72, and the lower surface of the flange portion 71b. Is supported in contact with the upper surface of the backing plate 74.

  Further, the die bush 71 has an internal height of the seat portion 105 so that the reflaring processing can be performed stably by accommodating the upper end portion of the die bush 71 in the seat portion 105 during the reflare processing. The dimension projects from the upper surface of the die plate 72.

  The die plate 72 is a member that holds the die bush 71, and holds the die bush 71 inside the stepped hole 72a by the structure as described above. The die plate 72 is fixed to the backing plate 74 by a shank (not shown).

  The payout pin 73 is used for paying out metal thin metal chips falling into the die bush 71 and is held in a hole 74 a formed in the backing plate 74. The upper part of the payout pin 73 is formed in a small diameter part 73a that can move up and down while sliding in the hole 71a of the die bush 71, and the lower part slides in the hole 74a formed in the backing plate 74. It is formed in the large diameter part 73b which can move up and down. The diameter of the large diameter portion 73 b is smaller than the outer diameter of the flange portion 71 b of the die bush 71 and larger than the hole diameter of the hole portion 71 a of the die bush 71. Accordingly, the payout pin 73 is restricted from being pulled upward by the flange portion 71 b of the die bush 71.

  Further, the payout pin 73 is a spring in which the lower surface, that is, the lower surface of the large-diameter portion 73b is urged upward so that the upper surface of the payout pin 73 is substantially the same as the upper surface of the die bush 71 when no force is applied from above. It is supported by the member 75.

  The backing plate 74 is a member that supports the die bush 71, and supports the die bush 71 by the peripheral portion of the hole 74a. Further, the hole 74 a of the backing plate 74 is formed to have a height dimension capable of forming the space portions 74 b and 74 c above and below the large diameter portion 73 b of the payout pin 73. The space portions 74b and 74c are pressed by the flared punch when the mold is closed and move downward, and function as an adjustment space for biasing the payout pin 73 upward by the spring member 75 when the mold is open. .

  The embedding block 76 is a member that supports the integrated die plate 72 and backing plate 74. Further, the embedding block 76 includes a storage hole for storing a spring member 75 attached below the payout pin 73.

  The lifting / lowering device 77 adjusts the height position of the upper surface of the die plate 72 and is attached so as to support the lower surface of the embedded block 76. That is, the lifting device 77 is configured to control the height position of the upper surface of the die plate 72 by moving the backing plate 74 and the die plate 72 up and down integrally through the embedded block 76.

  Further, as the lifting device 77, a tapered jib composed of a tapered jib upper member 77a and a tapered jib lower member 77b is used. In this tapered jib, the upper surface height of the tapered jib upper member 77a is adjusted by the taper jib lower member 77b being slid in the horizontal direction in the lower die set 52a. When the upper surface height of the tapered jib upper member 77a is adjusted, the backing plate 74 and the die plate 72 are moved up and down integrally, and as a result, the height position of the upper surface of the die plate 72 is adjusted to a predetermined position. The

The guide plate 78 fills the space around the embedding block 76 and holds the embedding block 76.
The keeper 79 restricts the upward movement of the assembly composed of the embedding block 76, the backing plate 74, and the die plate 72 supported by the elevating device 77, and restricts it through the spring member 79a. ing. The keeper 79 is fixed to the lower die set 52a by a shank.

[Operation of the present flaring machine]
Next, the operation of this processing apparatus will be described as an operation of the present refracting apparatus.
As shown in FIG. 4, in the present flaring processing apparatus, the metal thin plate P that has undergone the ironing processing step D in the mold open state is transferred to a predetermined position on the die plate 72. Next, as shown in FIG. 5, the upper mold 60 moves downward and shifts to the mold closed state.

  The die bush 71 protrudes slightly from the upper surface of the die plate 72 when the metal thin plate P is transferred to the reflare processing apparatus. However, as shown in FIG. 5, the metal thin plate P is moved and moved on the upper surface of the die plate 72, and is stopped at a position where the seat portion 105 covers the protruding portion.

  Next, as shown in FIG. 5, the upper mold 60 fixed to the slider (not shown) is moved downward, and the mold is closed. When the mold is closed, the leading end surface of the flared punch 61 descends and enters the vertical cylindrical portion 106 of the collar portion. And the front-end | tip part 61b of the reflare punch 61 continues the descent | fall as it is, and approachs into the inside of the hole 71a of the die bush 71. FIG. As described above, in the present embodiment, the hole 71 a of the die bush 71 functions as a relief hole for avoiding the front end 61 b of the reflare punch 61 from colliding with the upper surface of the lower mold 70.

  The distal end surface of the distal end portion 61 b that has entered the hole 71 a of the die bush 71 comes into contact with the upper end surface of the dispensing pin 73. At this time, since the payout pin 73 is urged upward by the spring member 75, the upper end surface of the payout pin 73 is pressed downward in a state where it abuts against the front end surface of the front end portion 61b. Note that the lowering operation of the reflier punch 61 is the same as the lowering operation of the upper mold 60. Therefore, the bottom dead center of the flared punch 61 is set simultaneously with the setting of the stroke of the upper mold 60.

  Further, when the reflare punch 61 is lowered to the bottom dead center and is closed, the metal thin plate P around the seat 11 (the seat 105 in the previous process) is pressed against the upper surface of the die plate 72 by the reflare bush 63. It is done. Thereby, it is prevented that the metal thin plate P deform | transforms at the time of a reflaring process. Further, the flared portion 13 is formed by the cooperation of the flange portion 61 c of the flared punch 61 and the stepped portion 63 b of the flared bush 63.

  In the fin manufacturing apparatus that performs such flaring processing, if the feed amount of the metal thin plate P is out of order due to an abnormality in the uncoiler 50 or the pitch feeder, the position of the reflier punch 61 and the color of the metal thin plate P that is fed. Deviation occurs in the position of the part 10. For this reason, as shown in FIG. 6, chips 80 are generated from the reflared portion 13 to be reflared, and the chips 80 fall into the holes 71a of the die bush 71 functioning as escape holes.

After the reflaring part 13 is formed, when the reflare punch 61 is pulled up to the upper position, the mold is opened.
When the mold is opened, the refractor punch 61 is pushed upward by the action of the spring member 75. The spring member 75 pushes up the upper end surface of the payout pin 73 to the upper end position of the die bush 71 when the mold is open, and does not set the bottom dead center of the flared punch 61. The payout pin 73 receives the pushing-up action of the spring member 75, and when the chip 80 of the metal thin plate P falls in the hole 71 a of the die bush 71, the chip 80 is discharged to the upper surface of the die plate 72. It works to give out. The chips 80 delivered to the upper surface of the die plate 72 move together with the metal thin plate P and are carried to the outside of the die plate 72.

  In this reflare processing apparatus, the height of the collar portion 10 is the height of the upper surface of the lower die 70, that is, the upper surface of the die plate 72 in view of the bottom dead center of the reflare punch 61 determined by the stroke of the upper die 60. It is done by adjusting the thickness. The height of the die plate 72 is adjusted by the adjustment function of the lifting device 77.

  This will be described more specifically. The elevating device 77 is a tapered jib composed of a tapered jib upper member 77a and a tapered jib lower member 77b. The lifting device 77 adjusts the height of the upper surface of the taper jib upper member 77a by moving the taper jib lower member 77b in a sliding manner in the horizontal direction in the lower die set 52a. Accordingly, the lifting device 77 moves the combination of the embedding block 76, the backing plate 74 and the die plate 72 supported on the upper surface of the taper jib upper member 77a up and down as a unit, thereby increasing the height of the upper surface of the die plate 72. It is adjusted. By this adjustment, the distance between the lower surface of the bush holder 64 of the upper mold 60 and the upper surface of the die plate 72 of the lower mold 70 in the mold closed state is adjusted, and the height of the collar portion is adjusted.

[Effect of the embodiment]
Since the reflare processing apparatus according to the present embodiment is configured as described above, the following effects can be obtained.

  (1) The hole 71a of the die bush 71 forms a relief hole for the reflier punch 61. Therefore, in the case where an error occurs between the position of the reflare punch 61 and the die bush 71 and the position of the collar portion 10 of the metal thin plate P to be sent due to some abnormality, the metal thin plate P as shown in FIG. May be fitted into the inside (hole) of the die bush 71. However, the chips 80 are pushed up to the upper surface of the die plate 72 by the dispensing pins 73 when the mold is open, and are carried to the outside of the die plate 72 together with the metal thin plate P. Therefore, the frequency required for maintenance and inspection of the flaring processing apparatus and the fin manufacturing apparatus including the processing apparatus is reduced, and the operating rate of the flaring processing apparatus, and eventually the fin manufacturing apparatus including the processing apparatus, is improved. be able to.

  (2) Since the die bush 71 and the payout pin 73 are prevented from coming off in the vertical direction by the combined structure of the die plate 72, the backing plate 74, and the embedded block 76, the number of parts of the lower mold 70 is reduced. .

  (3) The bottom dead center position of the reflare punch 61 is set by the vertical movement stroke of the upper mold 60, and the height position of the collar portion 10 adjusts the upper surface height position of the die plate 72. Is set by Therefore, since the two setting functions are distributed to the upper mold 60 and the lower mold 70, it is possible to simplify the mechanism and facilitate the setting operation of the flaring processing apparatus.

  (4) A tapered jib frequently used as the lifting device 77 can be applied. In addition, since the taper jib upper member 77a does not move during height adjustment, the taper jib can support the reflier punch 61 stably. Therefore, when the lifting / lowering device 77 is operated, there is little influence on the position adjustment of the tip of the payout pin 73 supported by the spring member 75 on the embedded block 76.

  (5) Since the payout pin 73 is adjusted by the spring member 75 so as to be in an upper surface height position suitable for supporting the lower surface of the collar portion of the metal thin plate P to be transferred in the mold open state. Further, it is possible to avoid meaningless protrusion of the tip end portion of the payout pin 73 upward of the die plate 72. Accordingly, it is possible to avoid the protrusion of the payout pin 73 which is a factor that hinders the transfer of the metal thin plate P.

  (6) Since the upper mold 60 includes the reflare bush 63 that presses the periphery of the collar portion 10 toward the upper surface of the die plate 72 during reflare processing, deformation applied to the thin metal plate P by reflare processing can be suppressed. .

  (7) In the fin 1 according to the present embodiment, since the flaring portion 13 is processed by the flaring processing apparatus according to the present embodiment, the operating rate of the fin manufacturing apparatus including the refringing apparatus is improved and is inexpensive. A heat exchanger fin can be provided.

(8) Since the heat exchanger according to the present embodiment uses the heat exchanger fin according to the present embodiment, an inexpensive heat exchanger can be provided.
[Modification]
The above embodiment can be modified as follows.

  -Although the shape of the collar part 10 has illustrated the thing in which the dish-shaped seat part 11 is formed in the downward part of the vertical cylindrical part 12, the thing which does not provide this seat part 11 may be sufficient. In addition, the shape of the seat portion 11 is circular in plan view, but the shape in plan view may be other shapes such as hexagons and quadrilaterals. In addition, in the case of a reflare device that manufactures the fin 1 that does not have the seat portion 11, the upper end portion of the die bush 71 may not be projected from the die plate 72, and may be made substantially the same as the upper surface of the die plate 72. .

  In the above-described embodiment, the die bush 71 is used, and the hole 71a inside the die bush 71 is used as a relief hole that avoids the collision of the tip portion of the reflare punch 61, but the die bush 71 is not used. A relief hole may be formed directly in the plate 72, and a payout pin 73 may be provided in the relief hole.

  In the case where the die bush 71 is not provided as described above, the escape hole may be formed from the die plate 72 to the backing plate 74. That is, the die plate 72 may be formed corresponding to the hole 71a of the die bush 71, and the backing plate 74 may be formed similar to the hole 74a in the above embodiment.

  -Although the taper jib which moves the taper jib lower member 77b in the horizontal direction was illustrated as the raising / lowering device 77 which adjusts the height of the upper end surface of the die plate 72, the taper jib upper member 77a can also be moved in the horizontal direction. . Moreover, it does not prevent changing as a raising / lowering apparatus to appropriate things other than a taper jib.

  -As an example of the fin 1, although the thing of 2 rows 6 steps was shown, about the number of rows, it is good also as 1 row or 3 rows or more. Also, the number of stages is not limited to 6, but may be 5 stages or less or 7 stages or more. Further, although the louver fin 20 is provided as an example of the fin 1, the louver fin 20 may be omitted. The louver fins 20 may have other shapes or structures.

P Metal thin plate 1 Fin 10 Collar portion 11 Seat portion 12 Vertical cylindrical portion 13 Reflair portion 20 Louver fin 30 Slit 40 Heat transfer tube 50 Uncoiler 51 Loop controller 52 Press device 52a Lower die set 52b Upper die set 53 Stacker 53a Pin 60 Upper die 61 Reflare punch 61a Flange portion 61b Tip portion 61c Fence portion 62 Punch holder 62a Stepped hole 63 Reflare bush 63a Flange portion 63b Stepped portion 64 Bush holder 64a Stepped hole 65 Spring member 70 Lower die 71 Die bush 71a Hole portion 71b Flange portion 72 Die plate 72a Stepped hole 73 Discharge pin 73a Small diameter portion 73b Large diameter portion 74 Backing plate 74a Hole portion 74b Space portion 74c Space portion 75 Spring member 76 Embedded block 77 Lifting device 77a Taper jib upper part Material 77b Tapered jib lower member 78 Guide plate 79 Keeper 79a Spring member 80 Chip 101 Overhang portion 102 Restriction portion 103 Lower hole 104 Burring portion 105 Seat portion 106 Vertical cylindrical portion 107 Reflare portion 201 Upper mold stage 202 Reflier punch 203 Lower mold stage 204 Metal thin plate 205 Reflare

Claims (8)

Provided with a reflare punch (61) for processing the reflare part (13) of the collar part (10) on the metal thin plate (P) that is the material of the fin (1) for the cross fin tube heat exchanger An upper mold (60) and a lower mold (70) disposed opposite to the upper mold (60),
The lower mold (70) includes a die bush (71) having a hole (71a) that allows entry of the tip of the reflier punch (61), and a die plate (72) that holds the die bush (71). And a discharge pin (73) for discharging the metal thin plate chips (80) entering the hole (71a) of the die bush (71), and the discharge pin (73) being slidable in the vertical direction. A backing plate (74) that holds and restricts the downward movement of the die bush (71), a spring member (75) that urges the lower surface of the payout pin (73) upward, and the spring member An apparatus for refining a fin for a heat exchanger having an embedded block (76) for fixing (75). The die plate (72) and the backing plate (74) are fixed,
The die bush (71) has a flange portion (71b) formed at the lower end thereof restricted to move upward by a stepped hole (72a) formed in the die plate (72).
The payout pin (73) has a lower portion formed in a stepped cylindrical shape having a large diameter with respect to the upper portion, and the upper portion is incorporated so as to move up and down in the die bush (71).
The backing plate (74) has a hole (74) that allows the lower part of the payout pin (73) to slide in the vertical direction, and the diameter of the hole (74) of the backing plate (74) is The fin for a heat exchanger according to claim 1, wherein the fin is formed to be smaller than an outer diameter of the flange portion (71b) of the die bush (71) and larger than an inner diameter of the hole portion (71a) of the die bush (71). Reflare processing equipment. The lower mold (70) has an elevating device (77) installed so as to support the lower surface of the embedded block (70),
The lifting device (77) controls the height position of the upper surface of the die plate (72) by integrally moving the embedded block (76), the backing plate (74) and the die plate (72) up and down. Configured to
The bottom dead center of the flared punch (61) is set by the vertical movement stroke of the upper mold (60),
The height of the reflare part (13) is adjusted by the dimension between the lower surface of the upper mold (60) and the upper surface of the lower mold (70) in a mold closed state,
The dimension between the lower surface of the upper mold (60) and the upper surface of the lower mold (70) in the mold closed state is adjusted by the height position of the upper surface of the die plate (72),
The height of the upper surface of the die plate (72) is adjusted by moving the embedded block (76), the backing plate (74) and the die plate (72) up and down integrally with the lifting device (77). It is comprised as follows. The reflaring apparatus of the fin for heat exchangers of Claim 2. The lifting device (77) is a tapered jib having a tapered jib lower member (77b) and a tapered jib upper member (77a), and the tapered jib lower member (77b) moves and the tapered jib upper member (77a) is fixed. It is comprised as follows. The reflaring apparatus of the fin for heat exchangers of Claim 3. The discharge pin (73) is moved by the spring member (75) so that the upper surface height position is suitable for supporting the lower surface of the collar portion of the metal thin plate (P) to be transferred in the mold open state. It is adjusted. The reflaring apparatus of the fin for heat exchangers of any one of Claims 1-4. The said upper mold | type (60) has a reflaring bush (63) which presses the periphery of a collar part (10) toward the upper surface of a die plate (71) at the time of a reflaring process. The heat exchanger fin reflaring apparatus as described.   The heat exchanger fin in which the collar portion (10) is manufactured by the reflare processing device for a heat exchanger fin according to any one of claims 1 to 6.   The heat exchanger using the fin for heat exchangers of Claim 7.