JP2008178916A - Press processing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide press processing equipment which can carry out sharp bending and punching to an end of the same workpiece with one turning cam without damaging a punching die formed at the turning cam by the running of a piercing punch on the die. <P>SOLUTION: When the turning of the turning cam 16 is stopped and the workpiece (w) is positioned, a flying cam 18 descends and slides to the side of the turning cam 16. First, a guide post 18d is inserted in a guide post hole 16f, and the motion of the turning cam 16 is regulated. Next, a sharp bending edge 18c comes into contact with the workpiece (w) to start the sharp bending, and the piercing punch 18a comes into contact with the workpiece (w) to start punching. The sharp bending and the punching are completed at a press bottom dead point. Because the turning of the turning cam 16 is regulated before the press processing, the position of punching die 16c is not deviated, and damage to the die caused by the running of the piercing punch 18a on the punching die 16c is prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a press working apparatus that performs bending and punching on an end portion of a plate-like workpiece.

  FIG. 3 is a perspective view illustrating an example of a workpiece end portion subjected to a bending process and a hole punching process. As shown in (a), flanges f1, f2, and h are formed at the ends of the workpiece w that was flat before processing. As shown in the sectional view of (b), the flange f1 enters the plane part p from the bending edge g toward the plane part p side. That is, the flange f1 is bent over a line gk extending from the bending edge g in parallel with the moving direction k of the press punch. In this case, simply moving the press punch along the movement direction k cannot be bent beyond the line gk, and the press punch is required to move toward the left side in the figure. Further, when the processed workpiece is moved in the k direction, the processed workpiece cannot be removed from the mold. In the present specification, bending beyond the bending edge g beyond a line gk extending in parallel with the pressing punch moving direction k is referred to as “bending processing”, and it is necessary to devise the pressing punch moving direction. Measures are required to ensure that the workpiece comes off the mold. M shown in (a) indicates a hole formed in the flange h, and there is often a case where the hole m is desired to be processed in the same process as the processing of the flanges f1, f2, h. Note that it does not matter whether the flange h to be drilled is bent until it approaches the flat portion p or bent away from the flat portion p. With this technique, at least a part of the workpiece is bent and bent, and at the same time, a hole is formed in a bent flange (which may itself be bent or simply bent). Regarding technology.

A conventional processing apparatus that satisfies this type of requirement will be described with reference to FIGS. FIG. 4 is a longitudinal sectional view of a conventional press working apparatus for a bending process, and FIG. 5 is a longitudinal sectional view of a hole processing portion of the press working apparatus of FIG. 4 and 5 show the state at the bottom dead center of the press.
First, the bending process will be described with reference to FIG. The pressing and bending portion 30a of the press working apparatus 30 includes a lower mold 32, and a rotating cam holder 34 is supported on the lower mold 32. The rotating cam holder 34 is formed with a cam groove 34a having an arc surface and a support surface 34b for supporting the workpiece w. A rotating cam 36 is rotatably accommodated in the cam groove 34a of the rotating cam holder 34. A U-groove 36a extending in the axial direction is formed in the rotating cam 36, and a side surface 36b for supporting the workpiece w from below is formed on the outer surface in the vicinity thereof together with a supporting surface 34b of the rotating cam holder 34. Also, a side bent portion 36d continuous with the side surface 36b is formed at a predetermined angle. A slide plate 36e for guiding an upper suspension cam 38, which will be described later, to the side of the rotating cam 36 is attached to a position facing the close-bending portion 36d. The slide plate 36e
Also serves as a stopper for turning the turning cam 36 clockwise. When the rotating cam 36 rotates clockwise in the drawing and the slide plate 36e contacts the wall surface 34c of the rotating cam holder 34, the side surface 36b of the rotating cam 36 is continuous with the support surface 34b of the rotating cam holder 34. It becomes the shape to do.

  Above the support surface 34b of the rotating cam holder 34 and the side surface 36b of the rotating cam 36, a pad 40 supported by an upper mold holder (not shown) so as to be movable up and down is disposed. The support surface 34b and the continuous surface of the side surface 36b of the rotating cam 36 are in surface contact. As a result, the workpiece w can be positioned between the pad 40 and the support surface 34 b of the rotating cam holder 34 and the side surface 36 b of the rotating cam 36. The plane portion p is formed at this portion.

  The upper suspension cam 38 touched earlier is attached to an inclined surface 42a formed on the upper mold 42 via a slide plate 42b. Therefore, the upper suspension cam 38 advances toward the rotating cam 36 by the slide plates 36e and 42b when the upper mold 42 is lowered. A close-up bending blade 38c is formed at the tip of the upper suspension cam 38 on the rotating cam 36 side, and when it moves forward to the rotating cam 36 side, it comes into surface contact with the approaching bending portion 36d of the rotating cam 36 and the workpiece w. To do.

  A procedure for performing a bending process by such a rotating cam mechanism will be described. A flat workpiece w is placed on the support surface 34 b of the rotating cam holder 34. The pad 40 supported by an upper mold holder (not shown) starts to descend and the rotating cam 36 rotates clockwise in the figure. When the slide plate 36e contacts the wall surface 34c of the rotation cam holder 34, the rotation of the rotation cam 36 stops. At this time, the support surface 34b of the rotation cam holder 34 and the side surface 36b of the rotation cam 36 form a continuous surface. Both support the workpiece w from below. In this state, the pad 40 comes into contact with the workpiece w from above, and is positioned with the workpiece w sandwiched together with the support surface 34b of the rotating cam holder 34 and the side surface 36b of the rotating cam 36.

  When the upper suspension cam 38 is lowered together with the upper mold 42, the upper suspension cam 38 is guided to the slide plates 36e and 42b and slides toward the rotating cam 36. The close bending blade 38c formed at the tip of the upper suspension cam 38 abuts against the end of the workpiece w positioned by the pad 40, the support surface 34b of the rotating cam holder 34, and the side surface 36b of the rotating cam 36. Further, the upper suspension cam 38 slides toward the rotating cam 36 while bending the end portion of the work w downward along the bent portion 36d, and eventually the bent portion of the rotating cam 36 sandwiching the end portion of the work w. Abut against 36d. As a result, the end portion of the workpiece w is bent at a predetermined bending angle. The upper suspension cam 38 is urged to the right side in the drawing by a spring (not shown), and the pad 40 is urged to the upper die holder side (not shown) by a spring (not shown). As the angle rises, it is returned to the position before processing. Further, the rotating cam 36 is rotated clockwise in the drawing at the time of machining, but is turned counterclockwise in the drawing after the completion of machining and returned to the position before the machining. As a result, it is possible to lift the workpiece that has been subjected to the bending process away from the rotating cam and lift the workpiece that has been subjected to the bending process.

  Next, the hole punching process will be described with reference to FIG. The hole punching process is performed in the hole punching 30b portion of the press working apparatus 30. The punching portion 30b of the press working apparatus 30 includes a lower die 32, and a support surface 32a for supporting the workpiece w is formed on the lower die 32. A punching die 32b is formed continuously with the support surface 32a. A slide plate 32d for guiding an upper suspension cam 58, which will be described later, is attached to the wall surface 32c of the lower mold 32, and guides the upper suspension cam 58 toward the hole punching die 32b.

  Above the support surface 32a of the lower mold 32, a pad 60 supported by an upper mold holder (not shown) so as to be movable up and down is disposed. When the pad 60 is lowered together with the upper mold holder, the pad 60 comes into surface contact with the support surface 32a of the lower mold 32. As a result, the workpiece w can be positioned between the pad 60 and the support surface 32a of the lower mold 32 for positioning.

  The upper suspension cam 58 touched earlier is attached to an inclined surface 62a formed on the upper mold 62 via a slide plate 62b. Therefore, the upper suspension cam 58 is guided to the punching die 32b side by the slide plates 32d and 62b when the upper mold 62 is lowered. A punching punch 58a is formed at the tip of the upper suspension cam 58 on the punching die 32b side, and a stripper 58b made of an elastic material such as urethane rubber is provided around the punching punch 58a. This punching punch 58 a corresponds to the punching die 32 b formed in the lower mold 32.

  The procedure for punching with such a slide cam mechanism is as follows. First, the plate-like workpiece w is placed on the support surface 32 a of the lower mold 32. The pad 60 supported by an upper mold holder (not shown) descends and comes into contact with the workpiece w from above, and is positioned with the workpiece w sandwiched together with the support surface 32a of the lower mold 32.

  When the upper suspension cam 58 is lowered together with the upper mold 62, the upper suspension cam 58 is guided by the slide plates 32d and 62b and slides toward the hole punching die 32b, and a hole punching punch 58a formed at the tip of the upper suspension cam 58 is formed. Approach with stripper 58b. Since the tip of the stripper 58b protrudes more toward the hole punching die 32b than the tip of the hole punching punch 58a, the hole punching punch 58a is placed at the end of the workpiece w positioned by the pad 60 and the support surface 32a of the lower die 32. The stripper 58b comes into contact earlier and presses the periphery of the predetermined drilling position at the end of the workpiece w. Furthermore, the upper suspension cam 58 slides, and the tip of the punching punch 58a comes into contact with a predetermined drilling position at the end of the workpiece w to make a hole. Thereby, the end portion of the workpiece w is punched at a predetermined position.

  The upper suspension cam 58 is urged to the right in the figure by a spring (not shown), and the pad 60 is urged to the upper mold holder (not shown) by a spring (not shown). As the angle rises, it is returned to the position before processing. At this time, the upper suspension cam 58 slides to the opposite side (right side in the drawing) of the hole punching die 32b, and the hole punching punch 58a is detached from the workpiece w before the stripper 58b. Meanwhile, since the stripper 58b still presses the work w, the work w does not bite into the punching punch 58a.

In the press working apparatus 30, the turning cam 36 is used in the close bending process part 30 a, and the turning cam 36 is not used in the hole punching part 30 b. As illustrated in FIG. 3, when two flanges f1 and f2 are bent at the end of one work w and punched at an intermediate position, two rotations 36 and 2 are used. The rotating cam holder 34 must be manufactured and the relative positional relationship between the two must be precisely adjusted and fixed to the lower mold 32. The adjustment process requires man-hours. Further, there is a problem that the mechanism of the processing apparatus becomes complicated and the cost is increased.
In the present invention, when the two flanges f1 and f2 are bent and bent, and the hole is punched at the intermediate position, the rotational cam necessary for bending and bending the two flanges f1 and f2 is set to 1. Realize technology that can be a continuous cam of books.

In the present invention, by providing a punching die that cooperates with the punching punch in the rotating cam, the rotating cam required for bending the plurality of flanges is made into one continuous cam. In this case, a hole punching die is provided at an intermediate position of the rotating cam. However, it is not possible to work well by simply providing the hole punching die at the intermediate position of the rotating cam. When the punching punch approaches the rotating cam and cooperates with the punching die, the punching die is not inserted into the punching die provided on the rotating cam, and the punching die is damaged. Because.
A processing apparatus according to the present invention includes a rotating cam holder having a support surface for supporting a plate-like workpiece, a rotating cam holder that is rotatably attached to the rotating cam holder, and a position adjacent to each other in the longitudinal direction of the moving bent portion. A rotating cam having a hole punching die formed on the pad, a pad that can be moved up and down and positioned with a workpiece sandwiched between the support surface of the rotating cam holder, and can be moved up and down, and at the bottom dead center It is possible to slide to the direction of the direction, and it is equipped with a close-up bending blade and a punch punch formed at a position adjacent to the longitudinal direction of the close-up bending blade, and slides to the rotating cam side to the end of the plate-like workpiece An upper suspension cam that performs a bending process and a hole punching process, and a restricting unit that restricts the rotation of the rotating cam with respect to the rotating cam holder before starting the bending process and the hole punching process on the end portion of the workpiece.

  In the press working apparatus of the present invention, a single bent cam is provided with a close-bend portion for close-bending and a punching die for punching continuously in the axial direction. Before the workpiece is positioned and press working is started, the turning cam is locked at a predetermined turning angle by the restricting means. As a result, the position of the rotating cam does not fluctuate. Therefore, when punching, the punching punch does not run on the punching die formed on the rotating cam, and the mold can be prevented from being damaged. it can. In addition, since one bending cam and hole punching can be performed by one continuous rotating cam, the processing efficiency can be improved and the manufacturing cost is reduced. Product accuracy is also improved.

  A guide post extending in the sliding direction is formed on the upper suspension cam, and if the guide post hole extending in the sliding direction is formed at the rotation angle at the time of machining, the rotation of the rotating cam is restricted. It is possible to easily provide a regulation means.

(Embodiment 1) The tip of the guide post has a tapered shape and can be inserted into the guide post hole even if there is a deviation in the rotation angle of the rotating cam. When the guide post is inserted into the guide post hole, the guide post rotates. The cam is adjusted to a predetermined rotation angle.

(Intermediate technology tried before completion of the present invention)
For the convenience of explanation, a technique attempted at an intermediate stage to the completion of the present invention will be described first. This intermediate technique is not a conventional technique defined by the Patent Law.
The present inventor uses one continuous rotating cam for processing into the shape of FIG. 3, that is, for punching a plurality of flanges f1 and f2 and punching them at an intermediate position. I tried a method to do. In this case, a side bending portion for bending and bending the two flanges f1 and f2 was provided on both sides of one continuous rotating cam, and a hole punching die was provided at an intermediate position thereof.

  FIG. 6 shows a cross section of the press working apparatus 70 at the position of the hole punching die. The press working apparatus 70 includes a lower mold 72, and a rotating cam holder 74 is supported on the lower mold 72. The rotating cam holder 74 is formed with a cam groove 74a having an arc surface and a support surface 74b for supporting the workpiece w. A rotating cam 76 is rotatably housed in the cam groove 74 a of the rotating cam holder 74. A U-groove 76a extending in the axial direction is formed in the rotating cam 76, and a side surface 76b for supporting the workpiece w from below is formed on the outer side surface in the vicinity thereof. A hole punching die 76c is formed continuously with the side surface 76b. At positions adjacent to both sides in the axial direction of the hole punching die 76c, close bending portions 76d extending at a predetermined angle are formed. A slide plate 76e for guiding the upper suspension cam 78 to the rotating cam 76 side is attached to a position facing the hole punching die 76c and the biased bending portion 76d. The slide plate 76e rotates together with the rotating cam 76. However, it also serves as a clockwise rotation stopper in the figure. When the rotating cam 76 rotates clockwise in the drawing and the slide plate 76 e comes into contact with the wall surface 74 c of the rotating cam holder 74, the side surface 76 b of the rotating cam 76 is continuous with the support surface 74 b of the rotating cam holder 74. It becomes the shape to do.

  Above the support surface 74b of the rotating cam holder 74 and the side surface 76b of the rotating cam 76, a pad 80 supported so as to be movable up and down by an upper mold holder (not shown) is disposed, and rotates when the pad 80 is lowered together with the upper mold holder. The support surface 74b of the cam holder 74 and the continuous surface of the side surface 76b of the rotating cam 76 are in surface contact. Thus, the workpiece w can be positioned between the pad 80 and the support surface 74 b of the rotating cam holder 74 and the side surface 76 b of the rotating cam 76.

  The upper suspension cam 78 touched earlier is attached to an inclined surface 82a formed on the upper mold 82 via a slide plate 82b. Therefore, the upper suspension cam 78 is guided to the rotating cam 76 side by the slide plates 76e and 82b when the upper mold 82 is lowered. A hole punch 78a is formed on the rotating cam 76 side of the upper suspension cam 78, and a stripper 78b made of an elastic member is provided around the hole punch 78a. This punching punch 78 a corresponds to a punching die 76 c formed on the rotating cam 76. Further, on the rotating cam 76 side of the upper suspension cam 78, a bending blade 78c is formed at a position adjacent to both sides in the axial direction of the hole punch 78a. Surface contact is made through the workpiece w.

  The procedure for performing the bending process and the punching process by such a rotating cam mechanism is as follows. A plate-like workpiece w is placed on the support surface 74 b of the rotating cam holder 74. The pad 80 supported by the upper mold holder (not shown) starts to descend and the rotating cam 76 rotates clockwise in the figure. When the slide plate 76e contacts the wall surface 74c of the rotating cam holder 74, the rotation of the rotating cam 76 stops. At this time, the support surface 74b of the rotating cam holder 74 and the side surface 76b of the rotating cam 76 form a continuous surface. Both support the workpiece w from below. In this state, the pad 80 comes into contact with the workpiece w from above, and is positioned with the workpiece w sandwiched together with the support surface 74b of the rotating cam holder 74 and the side surface 76b of the rotating cam 76.

  When the upper suspension cam 78 is lowered together with the upper mold 82, the upper suspension cam 78 is guided to the slide plates 76e and 82b and slides toward the rotating cam 76 side. Along with this, the bending blade 78c formed on the upper suspension cam 78 comes into contact with the end portion of the workpiece w positioned by the pad 80, the support surface 74b of the rotating cam holder 74 and the side surface 76b of the rotating cam 76. Furthermore, the upper suspension cam 78 slides toward the rotating cam 76 while bending the end portion of the workpiece w downward along the bent portion 76d, and eventually, the bent portion 76d of the rotating cam 76 sandwiching the end portion of the workpiece w. Abut. As a result, the end portion of the workpiece w is bent at a predetermined bending angle.

As the upper suspension cam 78 slides, the punching punch 78a formed on the upper suspension cam 78 approaches together with the stripper 78b in the same manner as the bending blade 78c. Since the tip of the stripper 78b protrudes toward the rotating cam 76 from the tip of the hole punch 78a, the stripper 78b comes into contact with the end of the positioned workpiece w before the hole punch 78a. The peripheral edge of a predetermined drilling position at the end is pressed. Furthermore, the upper suspension cam 78 slides, and the tip of the punching punch 78a comes into contact with a predetermined drilling position at the end of the workpiece w to make a hole. Thereby, the end portion of the workpiece w is punched at a predetermined position.
The circular scrap generated by the punching process is discharged to the outside from a scrap hole 74e formed in the rotating cam holder 74.

  The upper suspension cam 78 is urged to the right side in the figure by a spring (not shown), and the pad 80 is urged to the upper mold holder side (not shown) by a spring (not shown). Accordingly, the position is returned to the position before processing. The rotating cam 76 is rotated clockwise in the drawing at the time of processing, but is rotated counterclockwise in the drawing after the processing is completed, and returned to the position before processing. Further, when the punching punch 78a is detached from the workpiece w, the stripper 78b still presses the workpiece w toward the rotating cam, so that the workpiece w does not bite into the punching punch 78a.

According to this press working apparatus, one continuous rotating cam should be used for bending the two flanges f1 and f2 and punching them at an intermediate position.
Since the clearance between the side surface of the rotating cam and the arc surface of the rotating cam holder required for the rotating cam 76 to rotate is larger than the clearance between the hole punching die and the hole punching punch, In some cases, the rotation shaft of the rotating cam is shaken, the position of the punching die is shaken, and the punching punch runs on the punching die. This causes a problem that the punching punch breaks the rotating cam, and it is difficult to perform the punching process satisfactorily.

(Completed example)
An embodiment completed through the above intermediate technique will be described with reference to FIGS.
A press working apparatus 10 shown in FIG. 1 includes a lower mold 12, and the lower mold 12 supports a rotating cam holder 14. The rotating cam holder 14 is formed with a cam groove 14a having an arc surface and a support surface 14b for supporting the workpiece w. A rotating cam 16 is rotatably accommodated in the cam groove 14a of the rotating cam holder 14. A U-groove 16a extending in the axial direction is formed in the rotating cam 16, and a side surface 16b for supporting the workpiece w from below is formed on the outer surface in the vicinity thereof along with the supporting surface 14b of the rotating cam holder 14. A hole punching die 16c is formed continuously with the side surface 16b, and a bent portion 16d extending at a predetermined angle is formed at a position adjacent to the hole punching die 16c on both sides in the axial direction. . A slide plate 16e that guides an upper suspension cam 18 (to be described later) to the rotating cam 16 side is attached to a position facing the hole punching die 16c and the bent and bent portion 16d. It rotates and also serves as a clockwise rotation stopper in the figure. When the rotating cam 16 rotates clockwise in the drawing and the slide plate 16e comes into contact with the wall surface 14c of the rotating cam holder 14, the side surface 16b of the rotating cam 16 is continuous with the support surface 14b of the rotating cam holder 14. It becomes the shape to do.

  Above the support surface 14b of the rotating cam holder 14 and the side surface 16b of the rotating cam 16, a pad 20 supported so as to be movable up and down by an upper mold holder (not shown) is disposed. The support surface 14b and the continuous surface of the side surface 16b of the rotating cam 16 are in surface contact. Thus, the workpiece w can be positioned between the pad 20, the support surface 14 b of the rotating cam holder 14, and the side surface 16 b of the rotating cam 16. Further, the pad 20 is formed with a stripper portion 20a that comes into contact with the punching die 16c of the rotating cam 16 via the workpiece w. The stripper portion 20a is provided with a substantially cylindrical hole having a diameter larger than the outer diameter of the punching punch 18a.

  The upper suspension cam 18 touched earlier is attached to an inclined surface 22a formed on the upper mold 22 via a slide plate 22b. Therefore, the upper suspension cam 18 is guided to the rotating cam 16 side by the slide plates 16e and 22b when the upper mold 22 is lowered. A punching punch 18a supported by a retainer 18b is formed on the upper cam 18 on the rotating cam 16 side. The punching punch 18a corresponds to a punching die 16c formed on the rotating cam 16. Further, on the rotating cam 16 side of the upper suspension cam 18, a bend bending blade 18 c is formed adjacent to both sides in the axial direction of the hole punching punch 18 a, and the close bending portion 16 d of the rotating cam 16 and the workpiece w are formed. Surface contact through. The leading end of the bending blade 18c slightly protrudes toward the rotating cam 16 as compared with the leading end of the punching punch 18a.

  A substantially cylindrical guide post 18d is provided on the lower mold side of the upper suspension cam 18 in parallel with the hole punching punch 18a toward the rotating cam 16 side. A guide post hole 16f corresponding to the guide post 18d is formed at a position facing the side surface 16b of the rotating cam 16, and a guide post bush 16g is attached to the inner wall of the guide post hole 16f. The tip of the guide post 18d protrudes toward the rotating cam 16 from the tip of the punching punch 18a and the tip of the end bending blade 18c.

  The procedure for performing the bending process and the punching process by such a rotating cam mechanism is as follows. A plate-like workpiece w is placed on the support surface 14 b of the rotating cam holder 14. The pad 20 supported by the upper mold holder (not shown) starts to descend and the rotating cam 16 rotates clockwise in the figure. When the slide plate 16e contacts the wall surface 14c of the rotating cam holder 14, the rotation of the rotating cam 16 stops. At this time, the support surface 14b of the rotating cam holder 14 and the side surface 16b of the rotating cam 16 form a continuous surface. Both support the workpiece w from below. In this state, the pad 20 comes into contact with the workpiece w from above, and is positioned with the workpiece w sandwiched together with the support surface 14b of the rotating cam holder 14 and the side surface 16b of the rotating cam 16. FIG. 1 shows this state.

  When the upper suspension cam 18 is lowered together with the upper mold 22, the upper suspension cam 18 is slid toward the rotating cam 16 by being guided by the slide plates 16e and 22b. Along with this, the guide post 18d formed below the upper suspension cam 18 is inserted into the guide post hole 16f of the rotation cam 16 that has completed the rotation. The tip of the guide post 18d has a tapered shape 18d1, and the guide post 18d can be inserted into the guide post hole 16f even if the rotational angle of the rotational cam is deviated. A guide post bush 16g is attached to the inner wall of the guide post hole 16f, and the guide post bush 16g is in close contact with the side surface of the guide post 18d. When the guide post 18d is inserted into the guide post hole 16f, the rotation cam 16 is adjusted to a predetermined rotation angle. Note that the guide post bush 16g is a consumable item, and wears by repeated insertion of the guide post 18d, but can be easily replaced. The guide post hole 16f is provided with an air vent hole 16h communicating with the outside.

  When the guide post 18d is inserted to the middle of the guide post hole 16f along with the sliding of the upper suspension cam 18, the closing and bending blade 18c formed on the upper suspension cam 18 is rotated with the pad 20 similarly to the guide post 18d. It abuts against the end portion of the workpiece w positioned by the support surface 14b of the moving cam holder 14 and the side surface 16b of the rotating cam 16. Further, the upper suspension cam 18 slides toward the rotating cam 16 while bending the end portion of the workpiece w downward along the bent portion 16d, and eventually, the bent portion 16d of the rotating cam 16 sandwiching the end portion of the workpiece w. Abut. As a result, the end portion of the workpiece w is bent at a predetermined bending angle.

As the upper suspension cam 18 slides, the punching punch 18a formed on the upper suspension cam 18 abuts the end of the positioned workpiece w, like the guide post 18d and the bending blade 18c. The stripper portion 20a of the pad 20 is in contact with the hole punching die 16c via the work w, and presses the periphery of the work w at a predetermined drilling position. The punching punch 18a is inserted without contacting the inner wall of the hole provided in the stripper portion 20a. Further, the upper suspension cam 18 slides, and the tip of the punching punch 18a comes into contact with a predetermined drilling position at the end of the workpiece w to make a hole. Thereby, the end portion of the workpiece w is punched at a predetermined position.
Note that the circular scrap generated by the punching process falls through the scrap groove 14d formed in the rotating cam holder 14 into the scrap hole 14e, and is discharged to the outside.

  The upper suspension cam 18 is urged to the right side in the figure by a spring (not shown), and the pad 20 is urged to the upper mold holder side (not shown) by a spring (not shown). Accordingly, the position is returned to the position before processing. The rotating cam 16 was rotated clockwise in the figure by an air cylinder (not shown) at the time of machining. However, after the machining is completed, the rotating cam 16 is rotated counterclockwise in the figure and returned to the position before machining. Further, when the hole punching punch 18a is detached from the workpiece w, the stripper portion 20a presses the workpiece w toward the rotating cam 16, so the workpiece w does not bite into the hole punching punch 18a.

The operation timing of the press working apparatus 10 of the present embodiment is as follows.
(1) The pad 20 starts to descend and the rotating cam 16 rotates.
(2) The rotation of the rotation cam 16 stops and the workpiece w is positioned.
(3) The upper suspension cam 18 descends and slides toward the rotating cam 16 side.
(4) The guide post 18d is inserted into the guide post hole 16f, and the movement of the rotating cam 16 is restricted.
(5) The close bending blade 18c comes into contact with the workpiece w and starts the close bending process.
(6) The hole punching is brought into contact with the workpiece w to start the hole punching process.
(7) The bottom dead center of the press is reached, and the bending and punching processes are completed.
(8) The upper suspension cam 18, the rotation cam 16, and the pad 20 are returned to the positions before processing.

  Conventionally, when a single bent cam is provided with a bent portion and a punched portion, a problem may occur. That is, in order for the rotating cam to rotate within the cam camp of the rotating cam, a certain degree of tolerance is required for the rotating shaft of the rotating cam. Increasing this tolerance increases the amount of blurring that occurs when the rotating cam rotates. The minimum tolerance required for the rotating cam to rotate is larger than the clearance between the hole punch and the hole punching die. There was a case where the punch punched on the punching die and damaged the mold.

  However, according to the press working apparatus of the present embodiment, the guide post is inserted into the guide post hole provided in the rotary cam before the bending and punching process, so that the rotation cam rotates. Movement is regulated. For this reason, the position of the hole punching die of the rotating cam is determined, and the hole punching can be satisfactorily performed without causing a problem that the punching punch rides on the hole punching die and breaks the die.

  In the press working apparatus of the present invention, the bending process and the hole punching process can be simultaneously performed on the end portion of the workpiece by the rotating cam mechanism including one rotating cam. Thereby, the working efficiency of press working can be improved, and the cost can be reduced. Further, there is no deviation between these processing steps, and the product accuracy is improved.

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
In addition, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

The longitudinal cross-sectional view of the punching part of the press work apparatus in connection with a present Example. The longitudinal cross-sectional view of the punching part of the press work apparatus in connection with a present Example. The perspective view of the workpiece | work edge part after a process. The longitudinal cross-sectional view of the near bending part of the conventional press apparatus. The longitudinal cross-sectional view of the punching part of the conventional press apparatus. The longitudinal cross-sectional view of the punching part of the conventional press apparatus.

Explanation of symbols

w: Workpiece 10: Press working device 12: Lower die 14: Rotating cam holder 14a: Cam groove 14b: Support surface 14c: Wall surface 14d: Scrap groove 14e: Scrap hole 16: Rotating cam 16a: U groove 16b: Side surface 16c : Hole punching die 16d: Bending portion 16e: Slide plate 16f: Guide post hole 16g: Guide post bushing 16h: Air vent hole 18: Upper suspension cam 18a: Hole punching punch 18b: Retainer 18c: Bending blade 18d: Guide post 20: Pad 20a: Stripper unit 22: Upper mold 22a: Inclined surface 22b: Slide plate

Claims (2)

A rotating cam holder having a support surface for supporting the plate-like workpiece;
A rotating cam that is rotatably attached to the rotating cam holder and has a biased bending portion and a hole punching die formed at a position adjacent to the longitudinal direction of the biasing bending portion;
A pad that can be moved up and down and positioned with a plate-shaped workpiece sandwiched between the support surface of the rotating cam holder; and
It can be moved up and down, can slide to the lateral direction at the bottom dead center, has a bending blade and a punch hole formed at a position adjacent to the longitudinal direction of the bending blade, and slides toward the rotating cam. An upper suspension cam that performs bending and punching on the edge of the plate-shaped workpiece,
A press working apparatus having a restricting means for restricting the rotation of the rotating cam with respect to the rotating cam holder before starting the bending process and the hole punching process at the end of the workpiece.   2. A guide post extending in the sliding direction is formed in the upper suspension cam, and a guide post hole extending in the sliding direction is formed in the rotating cam at a rotating angle during processing. Press working equipment.

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