JP5915632B2 - Heat exchanger finning ironing apparatus, heat exchanger fin manufacturing method, and heat exchanger manufacturing method - Google Patents

Description

The present invention relates to an ironing processing apparatus for a heat exchanger fin, a heat exchanger fin manufacturing method for manufacturing a collar portion using the ironing processing apparatus, and a heat exchanger using the heat exchanger fin manufactured by the heat exchanger fin manufacturing method. The present invention relates to a container manufacturing method .

  The cross fin tube heat exchanger includes stacked rectangular fins and a heat transfer tube penetrating the stacked fins. The square fin is made of a metal thin plate and includes a collar portion for penetrating the heat transfer tube. The collar portion has a function of improving the heat conduction performance between the fin and the heat transfer tube while maintaining the pitch at which the fins are stacked at a constant interval.

  Such a collar portion is manufactured through each process of overhang processing, drawing processing, piercing burring processing, ironing processing, and reflaring processing on a metal thin plate. In these steps, it is important that the ironing process is performed while supplying lubricating oil to the ironing part in order to prevent cracking and cracking of the collar part and to improve the accuracy of the collar part.

  Conventionally, as a method for supplying lubricating oil to the tip of an ironing punch, as in Patent Document 1, an oil supply passage is formed in a stripper plate provided with a through hole through which the tip of the ironing punch is passed. To the inner wall surface of the through hole. As another method, as in Patent Document 2, a vertical oil supply passage (axial oil supply hole) is provided in the axial center of the ironing punch, and lateral oil supply from the vertical oil supply passage toward the side surface of the tip of the ironing punch. Some have holes (transverse oil holes). Patent Document 3 discloses a method of supplying lubricating oil to the longitudinal oil supply path of the shaft center when a longitudinal oil supply path is provided in the shaft center as in Patent Document 2. In Patent Document 3, a lubricating oil supply path is provided in a lower die set, and the lubricating oil supply path is communicated with a longitudinal oil supply path of an axial center.

JP-A-8-90122 JP-A-6-328172 JP 60-180631 A

  However, since the lubricating oil supply method of Patent Document 1 increases the distance from the inner wall surface of the through hole to the gap between the side surface of the ironing punch to which the lubricating oil must be supplied and the inner peripheral surface of the collar portion, There is a problem that it is difficult to supply lubricating oil to the ironing portion. In contrast, the lubricating oil supply method disclosed in Patent Document 2 does not have such a problem. However, Patent Document 2 does not disclose a method of supplying lubricating oil to the vertical oil supply passage. Further, the method of supplying lubricating oil to the vertical oil supply path described in Patent Document 3 is a case where a height adjusting device for adjusting the height of the ironing punch protruding from the upper surface of the lower mold plate is not provided. Thus, it is difficult to apply when a height adjusting device for adjusting the height of the ironing punch is provided. Thus, since the supply technology of the lubricating oil at the time of using the height adjustment apparatus of a color part is not established, the improvement for the improvement of the process precision of a color part is calculated | required.

The present invention has been made in view of such circumstances, and an ironing processing device for a heat exchanger fin with high processing accuracy of the collar portion, and a heat exchanger fin manufacturing method for manufacturing the collar portion by the ironing processing device. And it aims at providing the heat exchanger manufacturing method using the fin for heat exchangers manufactured by the fin manufacturing method for the same heat exchanger .

  An ironing processing apparatus for a heat exchanger fin that solves this problem has an upper mold provided with an ironing die, and a lower mold provided with an ironing punch in which a tip portion enters the ironing die, The lower mold further includes a punch plate that holds the ironing punch and a height adjusting device that adjusts a height position of an upper end surface of the ironing punch, and the punch plate includes the ironing punch. A through hole for inserting and holding the lower part of the plate and an oil supply passage in the plate that opens to the inner wall surface of the through hole, and the ironing punch is a vertical hole for supplying lubricating oil to the tip part. An oil supply passage, an oil supply groove formed in an annular shape on the outer peripheral surface for receiving the lubricating oil supplied from the in-plate oil supply passage, and a communication oil passage communicating the annular oil supply groove and the vertical oil supply passage The opening to the through hole of the oil supply passage in the plate and the annular oil supply groove are at any adjustment position when adjusting the height position of the upper end surface of the ironing punch by the height adjustment device. It is formed in a size and a positional relationship for maintaining communication.

  According to such a configuration, the ironing punch moves up and down when the height adjusting device that adjusts the height position of the upper end surface of the ironing punch is adjusted. For this reason, although the positional relationship between the opening to the through hole of the oil supply passage in the plate and the annular oil supply groove formed in the outer peripheral portion of the ironing punch is shifted, both of them are expected to be adjusted by the height adjustment device. The position and size are set so that they always communicate. Therefore, it is possible to supply lubricating oil to the processing surface during the ironing process without any trouble while providing a height adjusting device that adjusts the height position of the upper end surface of the ironing punch, thereby improving the processing accuracy of the collar portion. be able to.

It is preferable that an O-ring is attached between the outer peripheral surface of the ironing punch and the inner peripheral surface of the through hole at least at a position above the annular oil supply groove.
According to such a configuration, the clearance between the outer peripheral surface of the ironing punch and the through hole of the retaining member or the retaining member and the punch plate via the clearance between the ironing punch and the through hole of the punch plate. The amount of lubricating oil leaking to the upper outside through the gap can be reduced.

It is preferable that an O-ring is attached to each of an upper position and a lower position of the annular oil supply groove between the outer peripheral surface of the ironing punch and the inner peripheral surface of the through hole.
According to such a configuration, the clearance between the outer peripheral surface of the ironing punch and the through hole of the retaining member and the clearance between the retaining member and the punch plate via the clearance between the ironing punch and the through hole of the punch plate. The amount of lubricating oil that leaks to the outside and the amount of lubricating oil that leaks to the outside above and below from the gap between the punch plate and the lower die set can be reduced.

  The ironing punch and the punch plate are configured to be incorporated into an apparatus after the ironing punch is attached to the punch plate alone, and the attachment of the ironing punch to the punch plate alone is the upper and Attach only one of the lower O-rings, insert an ironing punch into the through-hole from the end of the O-ring not attached side, and punch the O-ring groove on the O-ring not attached side Protruding so that it is exposed to the outside of the plate, attaching an O-ring to the protruded O-ring groove, and then returning the protruding end to the intended assembly position in the through hole, thereby setting the ironing punch to the set position. The mounting position of the O-ring is fixed to the ironing pad. When the hose is assembled into the punch plate, the other O-ring can be attached at a position where the O-ring on the side attached first does not interfere with the opening of the oil supply hole in the plate that opens in the through hole. It is preferable.

  According to such a configuration, the O-ring is hooked on the opening portion of the in-plate oil supply passage into the through hole of the punch plate between the outer peripheral surface of the ironing punch and the inner peripheral surface of the through hole of the punch plate. O-rings can be attached to the top and bottom of the opening without any trouble.

It is preferable that the ironing punch has a horizontal oil supply passage disposed so as to open from the vertical oil supply passage toward a side surface of an upper end portion where an ironing process is performed.
According to such a configuration, the lubricating oil is supplied to the side surface of the upper end portion of the ironing punch where the ironing is performed, so that the lubricating oil is directly supplied to the ironing portion. Can do. Thereby, the cooling effect by lubricating oil can be improved and the processing precision of a collar part can be improved.

  The horizontal oil supply path is composed of a plurality of oil supply paths formed radially from the vertical oil supply path of the center of the ironing punch toward the outer peripheral surface of the upper end portion, and these oil supply paths are formed at equal intervals in the circumferential direction. It is preferable that

According to such a configuration, the lubricating oil can be smoothly supplied to the entire processing surface during the ironing processing, and the processing accuracy of the collar portion can be further improved.
The height adjusting device is a tapered jib composed of a tapered jib upper member and a tapered jib lower 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 that is frequently used as a height adjusting device. In addition, since the taper jib upper member does not move when the height is adjusted, the taper jib can stably support the ironing punch and reduce the leakage of the lubricating oil.

The heat exchanger fins manufacturing method for solving the above problems is to manufacture the collar with ironing processing apparatus of the heat exchanger fins.
According to such a configuration, since the processing accuracy of the collar portion is improved, it is possible to provide a heat exchanger fin with stable quality.

The heat exchanger manufacturing method for solving the above problems is to Ru with a heat exchanger fins fabricated by the heat exchanger fins manufacturing method.
According to such a configuration, since the processing accuracy of the collar portion is improved, it is possible to provide a heat exchanger with stable quality.

  According to the above invention, the lubricating oil can be supplied to the processing surface at the time of the ironing process without hindrance while having the height adjusting device for adjusting the height position of the upper end surface of the ironing punch. Accuracy can be improved.

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 at the time of mold opening of the metal mold | die which performs the eyering process in the formation process of the color part. It is sectional drawing at the time of mold closing of the metal mold | die. It is an enlarged view around the oil supply groove in the mold, and is a state diagram when the upper end surface of the ironing punch is adjusted to be higher by a taper jib that is a height adjusting device. It is an enlarged view around the oil supply groove, and is a state diagram when the upper end surface of the ironing punch is adjusted to be low by a taper jib that is a height adjusting device. It is drawing of the ironing punch in the metal mold | die, Comprising: (a) is an external side view, (b) is BB sectional drawing, (c) is CC sectional drawing. FIG. 4 is a schematic diagram for inserting an ironing punch into a single punch plate, wherein (a) is an insertion diagram after attaching an upper O-ring, and (b) is an insertion diagram after attaching a lower O-ring. It is.

  The specific example of the ironing processing apparatus of the fin for heat exchangers which concerns on embodiment of this invention is demonstrated below, referring 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. For this reason, 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.

[Description of mold for ironing]
Next, the mold for performing the ironing process in the fin manufacturing apparatus will be described with reference to the mold opening time in FIG.

  As shown in FIG. 4, the mold is composed of 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. ing. The upper die set 52b is fixed to a slide 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 simultaneously, 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.

  The upper die 60 includes an ironing die 61, a die holder 62 for fixing the ironing die 61, an upper die plate 63 for fixing the die holder 62, a knockout pin 64 housed in the hole 61a of the ironing die 61, a knockout pin. A spring 65 for urging 64 downward is provided.

  The lower die 70 has an ironing punch 71, a punch plate 72 that holds the ironing punch 71, a retaining member 73 that prevents the ironing punch 71 from coming off, a stripper plate 74, and the height of the upper end surface of the ironing punch 71. A height adjustment device 77 for adjustment is provided.

  As shown in FIG. 4, the ironing die 61 has a hole 61 a through which the tip of the ironing punch 71 included in the lower die 70 enters when the die is closed. A shallow dish-shaped large-diameter portion 61b is formed at the lower end portion of the hole portion 61a so that the seat portion 105 formed in the step D fits when the die is closed. The ironing die 61 has the same size as the die holder 62. The upper portion of the ironing die 61 forms a flange portion 61c having a large diameter and is inserted from above into a stepped mounting hole 62a formed in the die holder 62. The flange portion 61c is inserted into the shoulder portion 62b of the stepped mounting hole 62a. The downward movement is restricted by contact. Further, the ironing die 61 is restricted from being pulled upward by an upper mold plate 63 disposed above the die holder 62.

A lower portion of a knockout pin 64 urged downward by a spring 65 is inserted into the hole 61 a of the ironing die 61.
The knockout pin 64 has a flange portion 64a having a large diameter at the upper end portion, and a sliding portion 64b that slides in the hole portion 61a is formed below the flange portion 64a. The flange portion 64a is urged downward by a spring 65. The spring 65 is accommodated in a hole 66 provided so as to penetrate the upper die plate 63 from the upper die set 52b. A portion of the hole 66 that penetrates the upper mold plate 63 allows the flange portion 64 a of the knockout pin 64 to move up and down. In the mold open state, the knockout pin 64 is stationary because the lower surface of the flange portion 64 a is pressed against the upper end surface of the ironing die 61 by the biasing force of the spring 65. In this state, the knockout pin 64 is set so that the lower end surface thereof is substantially the same as or slightly protrudes from the lower surface of the die holder 62. The knockout pin 64 is configured to be pushed upward while contacting the top surface of the tip of the ironing punch 71 when the ironing punch 71 enters the hole 61a.

Next, components constituting the lower mold 70 will be described.
As shown in FIG. 4, the ironing punch 71 is a punch for performing an ironing process on the metal thin plate P that has finished the piercing burring process, and is stepped in four steps from below to above. It is formed in a cylindrical part. That is, the ironing punch 71 has a first cylindrical portion 71a at the lowermost end that is inserted and held in a through-hole 72a formed in the punch plate 72 so as to be slidable in the vertical direction, and is positioned above and removed. A second cylindrical portion 71 b that passes through the stopper member 73 and is inserted into the through hole 74 a of the stripper plate 74 is provided. Further, the ironing punch 71 has a tip for performing an ironing process on the thin metal plate P between the third cylindrical portion 71c configured to be able to pass through the stripper plate 74 and the inner surface of the hole 61a of the ironing die 61. And a fourth cylindrical portion 71d.

  A retaining member 73 is provided on the upper portion of the through hole 72a of the punch plate 72 into which the first cylindrical portion 71a of the ironing punch 71 is slidably inserted in the vertical direction. More specifically, the retaining member 73 is fixed to a recess on the upper surface of the punch plate 72. The retaining member 73 is provided with a through-hole 73a through which the second cylindrical portion 71b of the ironing punch 71 passes. The through hole 73a is formed smaller than the diameter of the first cylindrical portion 71a. Thus, when the ironing punch 71 tries to move upward, the first cylindrical portion 71 a is configured to abut against the retaining member 73. The retaining member 73 exhibits a retaining function above the ironing punch 71 by restricting the vertical movement of the first cylindrical portion 71a as described above. A sufficient gap is formed between the lower surface of the retaining member 73 and the upper surface of the first cylindrical portion 71a so that the height position of the upper end surface of the ironing punch 71 can be adjusted. .

  When a downward load is not applied to the stripper plate 74, that is, in a mold open state, the stripper plate 74 is biased upward by a spring 78 that is a biasing member, and the punch plate 72 and the retaining member 73 An interval of a predetermined distance is provided between the two. The spring 78 is provided between the stripper plate 74 and the punch plate 72. The stripper plate 74 has a through hole 74a through which the third cylindrical portion 71c and the fourth cylindrical portion 71d of the ironing punch 71 can pass. The position of the stripper plate 74 is adjusted so that the upper end surface of the ironing punch 71 is equal to or lower than the upper surface of the stripper plate 74 in the mold open state. On the upper surface of the stripper plate 74, the metal thin plate P in a state where the pierce burring process in the step D is finished is transferred and subjected to an ironing process.

  In the above description, the gaps between the inner surfaces of the through holes 72a, 73a, and 74a and the outer peripheral surface of the ironing punch 71 are large. On the other hand, the gap between the inner surface of the hole in the through hole 72 a of the punch plate 72 and the outer peripheral surface of the ironing punch 71 is small enough to allow sliding while holding the ironing punch 71.

  The ironing punch 71 is supported by a height adjusting device 77 for adjusting the height position of the long end surface of the ironing punch 71 at the lower end surface. Therefore, the ironing punch 71 moves up and down when the adjustment operation of the height adjusting device 77 is performed, and the height position of the upper end surface of the ironing punch 71 is adjusted to a predetermined position by this movement.

  As the height adjusting device 77, a tapered jib composed of a tapered jib upper member 77a and a tapered jib lower member 77b is used. In the 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 ironing punch 71 is moved in the vertical direction, and as a result, the height position of the upper end surface of the ironing punch 71 is adjusted to a predetermined position.

[Lubrication mechanism for the ironing section]
Next, the oil supply mechanism for the ironing processing portion configured as described above will be described.
As shown in FIGS. 4 and 5, in this embodiment, the oiling to the ironing portion is performed by the lubricating oil from the oil pump (not shown) formed in the plate oil supply passage 81 formed inside the punch plate 72. This is performed via an oil supply passage formed inside the ironing punch 71.

  As shown in FIG. 4, the in-plate oil supply passage 81 is a hole having a circular cross section, is formed in the horizontal direction inside the punch plate 72, and is formed so as to open to the through hole 72 a of the punch plate 72. .

  On the other hand, as shown in FIGS. 4 and 8 (a), the oil supply passage formed inside the ironing punch 71 includes an oil supply groove 82 formed on the outer periphery of the first cylindrical portion 71a, and the ironing punch 71. A vertical oil supply path 83 formed at the shaft center part, a horizontal oil supply path 84 formed at the upper end of the ironing punch 71, and a communication path 85 that connects the oil supply groove 82 and the vertical oil supply path 83 are formed.

As shown in FIG. 4, the oil supply groove 82 is formed at a position communicating with the opening 81 a to the through hole 72 a of the in-plate oil supply passage 81. The cross-sectional shape is formed as a semicircle.
As shown in FIGS. 6 and 7, the communication between the oil supply groove 82 and the opening 81 a is always performed when the position of the upper end surface of the ironing punch 71 is adjusted by the height adjusting device 77. Considered. 6 shows a case where the upper end surface of the ironing punch 71 is adjusted upward by the height adjusting device 77, and FIG. 7 shows a case where the upper end surface of the ironing punch 71 is adjusted downward by the height adjusting device 77. As shown in these drawings, the positions and sizes of the oil supply groove 82 and the opening 81a are set so as to always communicate with each other.

  Further, as shown in FIGS. 8A and 8B, the oil supply groove 82 is communicated with the vertical oil supply path 83 by four communication paths 85 that are arranged radially. These communication passages are arranged so as to leave a uniform interval in the circumferential direction.

  As shown in FIG. 8A, the vertical oil supply passage 83 is a hole extending from the lower end surface to the tip end portion, and a closing lid 83a is attached to the opening portion to the lower end surface by screwing. A plurality of lateral oil supply passages 84 are formed at the upper end of the vertical oil supply passage 83.

  As shown in FIG. 8 (c), the horizontal oil supply passages 84 are radially opened from the upper end of the vertical oil supply passage 83 toward the side surfaces, and are formed in a cross shape. Moreover, the some horizontal oil supply path 84 is. It is formed so that the intervals in the circumferential direction are equal.

  Also, as shown in FIGS. 4 and 5, the oil supply groove 82 from the opening 81a of the in-plate oil supply passage 81 must be performed through a gap between the outer peripheral surface of the ironing punch 71 and the inner peripheral surface of the through hole 72a. Therefore, there is a possibility that the lubricating oil leaks to the outside through a gap between the outer peripheral surface of the ironing punch 71 and the inner peripheral surface of the through hole 72a. For this purpose, O-rings 86 and 87 are provided at the upper and lower portions of the communication portion between the opening 81a and the oil supply groove 82 in the gap between the outer peripheral surface of the ironing punch 71 and the inner peripheral surface of the through hole 72a.

  Note that the upper portion of the punch plate 72 is a gap between the outer peripheral surface of the second cylindrical portion 71b of the ironing punch 71 and the inner peripheral surface of the through hole 73a of the retaining member 73, or the lower surface of the retaining member 73 and the punch. The gap with the plate 72 is larger than the lower gap, and there is a possibility that the amount of leakage of the lubricating oil becomes large. On the other hand, since the gap between the punch plate 72 and the lower die set 52a is small in the lower portion of the punch plate 72, the amount of lubricating oil leakage is small. Therefore, it is practically possible to omit the lower O-ring 87.

[O-ring installation instructions]
Next, how to attach the O-rings 86 and 87 will be described.
In this embodiment, since the O-rings 86 and 87 are attached to the upper and lower portions of the communication portion between the opening 81a and the oil supply groove 82, the O-rings 86 and 87 are in contact with the opening so as not to be damaged. There is a need to.

  For this purpose, as shown in FIG. 9A, first, one O-ring, for example, an upper O-ring 86 is attached to the ironing punch 71. Next, the ironing punch 71 is inserted into the through hole 72a of the punch plate 72 from below. Then, as shown in FIG. 9B, the lower O-ring groove is projected so as to be exposed below the punch plate 72. At this time, the ironing punch 71 is set so that the upper O-ring 86 can be stopped before contacting the opening 81 a of the in-plate oil supply passage 81. Next, after attaching the O-ring 87 to the protruded lower O-ring groove, the protruded end portion is returned into the through hole 72a to the position to be assembled (the position in FIGS. 4 and 5), and the ironing punch 71 is fixed. Then, the punch plate 72 in which the ironing punch 71 is inserted is fixed to the lower die set 52a. Further, the retaining member 73 is fixed to the punch plate 72. In this way, the O-rings 86 and 87 can be attached without being hooked on the opening 81a.

[Operation of this ironing machine]
Next, the operation of this machining apparatus will be described as the action of the present ironing apparatus.
As shown in FIG. 4, in this ironing apparatus, the thin metal plate P that has undergone the pierce burring process of the process D is transferred to a predetermined position on the stripper plate 74 in the mold open state. Next, as shown in FIG. 5, the upper mold 60 moves downward and shifts to the mold closed state.

  When the upper mold 60 moves downward and shifts to the mold closed state, the stripper plate 74 is pushed downward by the lower end surface of the ironing die 61. By this pushing, the distance between the punch plate 72 and the stripper plate 74 is shortened, and the tip of the ironing punch 71 passes through the through hole 74 a and protrudes to the upper surface of the stripper plate 74. The ironing die 61 is clamped by pressing the periphery of the thin metal plate around the seat portion 105 against the upper surface of the stripper plate 74 at the lower end surface, while the seat portion 105 fits into the large diameter portion 61b at the lower end of the hole portion 61a. It will be in a state to enter. Further, the ironing punch 71 passes through the lower hole 103 and the knockout pin 64 enters the hole 61 a against the urging force of the spring 65. And with this approach, the metal thin plate provided with the lower hole 103, the burring part 104, and the seat part 105 between the side surface of the fourth cylindrical part 71d at the tip of the ironing punch 71 and the inner wall surface of the hole part 61a. An ironing process is performed on the bulging portion of P to form a vertical cylindrical portion 106 having a predetermined height (see FIGS. 3C and 3D).

  As shown in FIG. 5, when the tip portion of the ironing punch 71 enters the hole 61 a by the downward movement of the upper mold 60 and the ironing process is performed, the upper end surface of the ironing punch 71 is the knockout pin 64. The ironing punch 71 pushes the knockout pin 64 upward against the downward biasing force of the spring 65.

  As shown in FIG. 4, when the die opening state is reached upon completion of the ironing process, the knockout pin moves downward as the ironing punch moves downward, and its lower end surface is substantially the same as the lower surface of the die holder 62. It is set to move to the extent that it comes out a little. And the bulging part in the middle of the process of the metal thin plate P adhering to the inner surface of the hole 61a with this movement can be pushed out, and thereby the metal thin plate P can be released from the upper mold.

  As shown in FIGS. 4 and 5, the lubricating oil is supplied from the in-plate oil supply path 81 to a mist shape between the side surface of the front end portion of the ironing punch 71 that is an ironing processing portion and the inner peripheral surface of the hole 61 a. The press working oil is supplied. The mist-like lubricating oil supplied from the in-plate oil supply path 81 is supplied through the path of the opening 81a, the oil supply groove 82, the communication path 85, the vertical oil supply path 83, and the horizontal oil supply path 84.

  The movement from the opening 81a to the oil supply groove 82 is such that the gap between the outer peripheral surface of the first cylindrical portion 71a of the ironing punch and the inner peripheral surface of the through hole 72a is small, and the oil supply groove 82 goes around the outer peripheral surface. Is formed smoothly. Moreover, as shown in FIG.8 (c), since the horizontal oil supply path 84 is cross-shaped and is arrange | positioned so that it may be equally divided in the circumferential direction, it can supply oil smoothly to the whole ironing process part. it can.

  Further, in this processing apparatus, when the height of the upper end surface of the ironing punch 71 is adjusted, the taper jib lower member 77b constituting the height adjusting apparatus 77 is moved in the horizontal direction manually or by an electric motor, and the ironing is performed. The upper surface height of the tapered jib upper member 77a that supports the punch 71 is adjusted. In this case, since the oil supply groove 82 moves up and down in the same manner as the ironing punch 71 moves up and down, the position of the oil supply groove 82 and the opening 81a of the in-plate oil supply path 81 is shifted, but communication is not hindered. The sizes and positions of the oil supply groove 82 and the opening 81a are set. Therefore, even if the height adjusting device 77 is operated as necessary, there is no problem in refueling the ironing portion.

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

  (1) The opening 81a of the in-plate oil supply passage 81 and the oil supply groove 82 are large enough to maintain communication at any adjustment position when the height adjustment device 77 adjusts the height position of the upper end surface of the ironing punch 71. And a positional relationship. Therefore, according to this ironing processing apparatus, the lubricating oil can be supplied to the ironing processing section without hindrance while the height adjusting apparatus 77 for adjusting the height position of the upper end surface of the ironing punch 71 is provided.

  (2) An O-ring 86 is attached at least above the oil supply groove 82 between the outer peripheral surface of the ironing punch 71 and the inner peripheral surface of the through hole 72a of the punch plate 72. Therefore, the clearance between the outer peripheral surface of the ironing punch 71 and the through-hole 73a of the retaining member 73 or the retaining member 73 and the punch through the clearance between the ironing punch 71 and the through-hole 72a of the punch plate 72. The amount of lubricating oil that leaks to the outside through the gap between the plates 72 can be reduced.

  (3) Between the outer peripheral surface of the ironing punch 71 and the inner peripheral surface of the through hole 72a of the punch plate 72, O-rings are attached to the upper and lower positions of the oil supply groove 82, respectively. Therefore, the clearance between the outer peripheral surface of the ironing punch 71 and the through hole 73a of the retaining member 73, the retaining member 73 and the punch plate 72 via the clearance between the ironing punch 71 and the through hole 72a of the punch plate 72. And the amount of lubricating oil leaking to the upper and lower outside through the gap between the punch plate 72 and the lower die set 52a can be reduced.

  (4) Between the outer peripheral surface of the ironing punch 71 and the inner peripheral surface of the through hole 72a of the punch plate 72, the O-ring is not caught on the opening 81a of the in-plate oil supply passage 81, and above and below this opening. O-rings 86 and 87 can be attached without hindrance.

  (5) Since the oil supply mechanism for supplying the lubricating oil is formed on the side surface of the upper end portion of the ironing punch 71 where the ironing is performed, the lubricating oil can be directly supplied to the ironing processed portion. Thereby, the cooling effect by lubricating oil can be improved and the processing precision of the collar part 10 can be improved.

  (6) The horizontal oil supply path 84 is composed of a plurality of horizontal oil supply paths formed radially from the vertical oil supply path 83 at the center of the ironing punch 71 toward the outer peripheral side surface of the upper end portion. It is formed at equal intervals in the circumferential direction. Therefore, the lubricating oil can be smoothly supplied to the entire area of the ironing processing portion, and the processing accuracy of the collar portion can be further improved.

  (7) Since the height adjusting device 77 that adjusts the height position of the upper end surface of the ironing punch 71 is a taper jib that adjusts the height by moving the taper jib lower member 77b, the taper jib upper member 77a moves during height adjustment. do not do. Therefore, the ironing punch 71 can be stably supported and the leakage of the lubricating oil can be reduced.

(8) If the fins are manufactured by the present ironing apparatus, the processing accuracy of the collar portion is improved, so that a heat exchanger fin of stable quality can be provided.
(9) Further, if a heat exchanger is manufactured using this fin, the processing accuracy of the collar portion is improved, so that a heat exchanger with stable quality can be provided.

[Modification]
The above embodiment can be modified as follows.
-Although the four horizontal oil supply path 84 was formed in the cross shape, it is not limited to this, You may increase / decrease suitably. For example, the number 81a may be two or three. Even in this case, it is preferable that the circumferential intervals of the plurality of lateral oil supply passages 84 be equal.

  The opening 81a to the through hole 72a of the in-plate oil supply passage 81 has a shape in which the in-plate oil supply passage 81 made of a hole having a circular cross section opens directly, but the communication area with the oil supply groove 82 is increased. Therefore, it is possible to make the opening large.

  The oil supply groove 82 is formed so as to have a semicircular cross-sectional shape, but this cross-section may be a half of an oval or an ellipse that is elongated in the vertical direction. If it does in this way, communication with the opening part 81a of the oil supply path 81 in a plate can be performed easily.

  As the height adjusting device 77 for adjusting the height of the upper end surface of the ironing punch 71, a tapered jib that moves the tapered jib lower member 77b in the horizontal direction is illustrated, but the tapered jib upper member 77a is moved in the horizontal direction. You can also. In this case, since the support surface that supports the lower end of the ironing punch 71 moves, there is a concern about the influence on the posture of the ironing punch 71. Moreover, it does not prevent changing as an appropriate apparatus other than a taper jib as a height adjustment apparatus.

  The vertical oil supply path 83 of the ironing punch 71 is, for example, narrowed in the middle upward as shown in FIG. 4, but this is not essential. The pipe diameter may not be reduced in the middle.

  -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.

  -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 Ironing die 61a Hole portion 61b Large diameter portion 61c Flange portion 62 Die holder 62a Step mounting hole 62b Shoulder portion 63 Upper die plate 64 Knockout pin 64a Flange portion 64b Sliding portion 65 Spring 66 Hole 70 Lower die 71 Eyening Punch 71a First cylindrical portion 71b Second cylindrical portion 71c Third cylindrical portion 71d Fourth cylindrical portion 72 Punch plate 72a Through hole 73 Retaining member 73a Through hole 74 Stripper plate 74a Through hole 77 Height adjusting device 77a Tapered jib upper member 7 b Tapered jib lower member 78 Spring 81 In-plate oil supply passage 81a Opening portion 82 Oil supply groove 83 Vertical oil supply passage 83a Closure lid 84 Horizontal oil supply passage 85 Communication oil passage 86 O-ring 87 O-ring 101 Overhang portion 102 Restriction portion 103 Lower hole 104 Burring portion 105 Seat 106 Vertical cylinder 107 Reflare

Claims (9)

An upper die (60) provided with an ironing die (61), and a lower die (70) provided with an ironing punch (71) into which a tip portion enters the ironing die (61),
Further, the lower mold (70) includes a punch plate (72) for holding the ironing punch (71) and a height adjusting device (77) for adjusting the height position of the upper end surface of the ironing punch (71). )
The punch plate (72) includes a through hole (72a) for inserting and holding a lower portion of the ironing punch (71), and an in-plate oil supply passage (opening on an inner wall surface of the through hole (72a)). 81)
The ironing punch (71) has a longitudinal oil supply path (83) for supplying lubricating oil to the tip, and an annular outer circumferential surface for receiving the lubricating oil supplied from the in-plate oil supply path (81). An oil supply groove (82) formed; and a communication oil passage (85) communicating the annular oil supply groove (82) and the vertical oil supply passage (83);
The opening (81a) to the through hole (72a) of the in-plate oil supply passage (81) and the annular oil supply groove (82) are formed by an ironing punch (71) by the height adjusting device (77). An ironing processing device for heat exchanger fins, which is formed in a size and positional relationship that maintains communication at any adjustment position when the height position of the upper end surface is adjusted. Between the outer peripheral surface of the ironing punch (71) and the inner peripheral surface of the through hole (72a), an O-ring (86) is attached at least above the annular oil supply groove (82). The ironing processing apparatus of the fin for heat exchangers of Claim 1. Between the outer peripheral surface of the ironing punch (81) and the inner peripheral surface of the through hole (72a), O-rings (86, 87) are respectively attached above and below the annular oil supply groove. The ironing processing apparatus of the fin for heat exchangers of Claim 1. The ironing punch (71) and the punch plate (72) are configured to be incorporated into an apparatus after the ironing punch (71) is attached to the punch plate (72) alone,
The ironing punch (71) is attached to the punch plate (72) alone by attaching only one of the upper and lower O-rings (86, 87), and the ironing punch (72) is attached to the O-ring (86). , 87) is inserted into the through hole (72a) from the end of the non-attached side, and the O-ring groove part of the non-attached side of the O-ring (86, 87) is placed outside the punch plate (72). The O-ring (86, 87) is attached to the protruded O-ring groove, and then the projected end is returned to the intended assembly position in the through-hole (72a), so that the The fixing punch (71) is fixed at a set position, and the mounting position of the O-ring (86, 87) is the same as that of the ironing punch (71). At the time of assembling into the punch plate (72), the O-ring (86, 87) on the side attached first interferes with the opening (81a) of the oil supply hole (81) in the plate that opens to the through hole (72a). The ironing processing apparatus for heat exchanger fins according to claim 3, wherein the other O-ring (86, 87) can be mounted at a position where the heat exchanger is not used. The said ironing punch (71) has the horizontal oil supply path (82) which opens the said vertical oil supply path (81) in the side surface of the upper end part in which an ironing process is performed. An ironing apparatus for heat exchanger fins according to 1. The fins for heat exchangers according to claim 5, wherein the horizontal oil supply passages are composed of a plurality of radial formations from the vertical oil supply passages toward the side surfaces, and the horizontal oil supply passages are formed at equal intervals in the circumferential direction. Ironing machine. The height adjusting device is a tapered jib composed of a tapered jib upper member (77a) and a tapered jib lower member (77b),
The said taper jib is comprised so that height adjustment may be performed by the movement of a taper jib lower member (77b). The ironing processing apparatus of the fin for heat exchangers of any one of Claims 1-6. The heat exchanger fin manufacturing method which manufactures a collar part (10) with the ironing processing apparatus of the heat exchanger fin of any one of Claims 1-7. Heat exchanger manufacturing method using the heat exchanger fins fabricated by heat exchange fin manufacturing method according to claim 8.