JP2003205320A - Press processing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide press processing equipment which can carry out draw-back bending cam 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 stops 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 draw-back bending edge 18c contacts the workpiece w to start the draw-back bending, and the piercing punch 18a contacts the workpiece w to start punching. The draw-back 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 in 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)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press working apparatus that performs a bending work and a punching work on an end portion of a plate-shaped work.

[0002]

2. Description of the Related Art FIG. 3 illustrates a perspective view of an example of a work end portion that has been subjected to a bending and bending process and a punching process. As shown in (a), the flanges f1, f2, and h are formed at the end of the work w that was flat before processing. As shown in the sectional view of (b), the flange f1 is inserted into the plane portion p from the bending edge g toward the plane portion p side. That is,
The flange f1 is bent beyond a line gk extending from the bending edge g in parallel with the moving direction k of the punch for pressing.
In this case, it is not possible to bend it beyond the line gk simply by moving the press punch along the moving direction k,
The pressing punch is required to move toward the left side in the drawing.
Further, if the processed work is moved in the k direction, the processed work cannot be removed from the forming die. In the present specification, bending beyond the line gk extending from the bending edge g in parallel with the moving direction k of the press punch is referred to as an approach bending process. Measures are required to ensure that the work piece can be removed from the mold. The symbol m shown in (a) indicates a hole formed in the flange h, and it is often the case that the hole m is desired to be processed in the same process as the processing of the flanges f1, f2, h. In addition, it does not matter whether the flange h to be machined is bent until it comes close to the plane portion p, or is bent away from the plane portion p. According to the present technology, at least a part of a work is bent at the same time, and at the same time, a bent flange (which itself may be bent or bent, or may be simply bent) is drilled. Regarding technology.

A conventional processing apparatus that meets this type of need will be described with reference to FIGS. 4 and 5. FIG. 4 is a vertical cross-sectional view of a conventional press-forming apparatus for the close-bending process, and FIG. 5 is a vertical cross-sectional view of a hole processing portion of the press-processing apparatus of FIG. 4 and 5
Indicates the condition at the bottom dead center of the press. First, the bending process will be described with reference to FIG. The pressing / bending portion 30a of the press working device 30 includes a lower mold 32.
A rotating cam holder 34 is supported on the shaft 2. The rotating cam holder 34 is provided with a cam groove 34a having an arc surface and a support surface 34b for supporting the work w. Further, the rotating cam 36 is inserted into the cam groove 34a of the rotating cam holder 34.
Is rotatably stored. A U-groove 36a extending in the axial direction is formed on the rotating cam 36, and a side surface 36b for supporting the work w from below is formed on the outer surface in the vicinity thereof along with the supporting surface 34b of the rotating cam holder 34. Further, a side-bend portion 36d continuous with the side surface 36b is formed at a predetermined angle. A slide plate 36e for guiding an upper hanging cam 38, which will be described later, to the rotating cam 36 side is attached at a position facing the biased bending portion 36d. The slide plate 36e rotates the rotating cam 36 in the clockwise direction in the drawing. It also plays the role of a motion stopper. When the rotation cam 36 rotates clockwise in the drawing and the slide plate 36e contacts the wall surface 34c of the rotation cam holder 34, the side surface 36b of the rotation cam 36 is continuous with the support surface 34b of the rotation cam holder 34. It is shaped to

Above the supporting 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 able to move up and down is arranged. Support surface 3 of cam holder 34
4b and the continuous surface of the side surface 36b of the rotating cam 36 are in surface contact with each other. As a result, the workpiece w can be sandwiched and positioned between the pad 40 and the support surface 34b of the rotary cam holder 34 and the side surface 36b of the rotary cam 36. The flat portion p is formed at this portion.

The upper suspension cam 38 mentioned above is attached to the inclined surface 42a formed on the upper mold 42 through the slide plate 42b. Therefore, the upper suspension cam 38 is connected to the upper mold 42.
When is lowered, the slide plates 36e and 42b advance to the rotating cam 36 side. The tip of the upper suspension cam 38 on the side of the turning cam 36 is formed with a bending blade 38c. When the blade is advanced to the side of the turning cam 36, the bending portion 36 of the turning cam 36 is bent.
Surface contact with d via the workpiece w.

A procedure for performing a bending process by using such a rotating cam mechanism will be described. The flat plate-shaped work w is placed on the support surface 34b of the rotating cam holder 34. The pad 40 supported by the upper mold holder (not shown) starts to descend, and the rotating cam 36 rotates clockwise in the drawing. When the slide plate 36e comes into contact with the wall surface 34c of the rotary cam holder 34, the rotation of the rotary cam 36 stops, and at this time, the support surface 34b of the rotary cam holder 34 and the side surface 36b of the rotary cam 36 form a continuous surface. And both support the work w from below. In this state, the pad 40 comes into contact with the work w from above and positions the work w together with the support surface 34b of the rotary cam holder 34 and the side surface 36b of the rotary cam 36.

When the upper suspension cam 38 descends together with the upper mold 42, the upper suspension cam 38 slides toward the rotary cam 36 by being guided by the slide plates 36e and 42b. Top hanging cam 3
The bending blade 38c formed at the tip of
And a supporting surface 34b of the rotating cam holder 34 and the rotating cam 3
The end face of the work w positioned by the side surface 36b of the workpiece 6 contacts. Further, the upper suspension cam 38 slides toward the rotating cam 36 side while bending the end portion of the work w downward along the bending portion 36d, and eventually the bending portion of the rotating cam 36 with the end portion of the work w sandwiched therebetween. Abut 36d. As a result, the end of the work w is bent to a predetermined bending angle. The upper suspension cam 38 is urged to the right side in the figure 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 they rise, they are returned to their original positions. Also, the rotating cam 3
6 rotates clockwise in the drawing at the time of processing, but after processing is completed, it rotates counterclockwise in the drawing and returns to the position before processing. As a result, the work that has been bent and bent is separated from the rotating cam, and the work that has been bent and bent can be lifted upward.

Next, the punching process will be described with reference to FIG. The punching process is performed by the punching device 30
Part b. Hole punching portion 30b of the press working device 30
Is provided with a lower die 32, and a supporting surface 32a for supporting the work w is formed on the lower die 32. A punching die 32b is formed continuously with the support surface 32a. Further, a slide plate 32d that guides an upper suspension cam 58 described later is attached to the wall surface 32c of the lower mold 32, and the upper suspension cam 58 is attached.
Is guided to the punching die 32b side.

Above the supporting surface 32a of the lower mold 32, a pad 60 supported by a not-shown upper mold holder so as to be able to move up and down is arranged. When the pad 60 descends together with the upper mold holder, it makes surface contact with the supporting surface 32a of the lower mold 32. . Accordingly, the work w can be sandwiched and positioned between the pad 60 and the support surface 32a of the lower die 32.

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

The procedure for punching with such a slide cam mechanism is as follows. First, the plate-shaped work w is placed on the support surface 32 a of the lower die 32. The pad 60 supported by an upper mold holder (not shown) descends and contacts the work w from above, and positions the work w together with the support surface 32a of the lower mold 32.

When the upper hanging cam 58 descends together with the upper die 62, the upper hanging cam 58 is guided by the slide plates 32d and 62b and slides toward the punching die 32b side, and the hole formed at the tip of the upper hanging cam 58 is punched. The punch 58a approaches with the stripper 58b. Since the tip of the stripper 58b projects toward the punching die 32b side more than the tip of the punch punch 58a, the pad 60 and the support surface 32a of the lower die 32 are formed.
The stripper 58b comes into contact with the end portion of the work w positioned by the prior to the punch punch 58a to press the peripheral edge of the end portion of the work w at a predetermined drilling position. Further, the upper hanging cam 58 slides, and the tip of the punch punch 58a abuts at a predetermined drilling position on the end portion of the work w to make a hole. As a result, the end of the work w is punched at a predetermined position.

Since the upper suspension cam 58 is urged to the right side in the figure by a spring (not shown) and the pad 60 is urged to the upper die holder side (not shown) by a spring (not shown), after the machining is completed, As the upper mold 62 is raised, the upper mold 62 is returned to the position before processing. At this time,
The upper hanging cam 58 slides to the opposite side (right side in the drawing) of the punching die 32b, and the punching punch 58a is separated from the work w before the stripper 58b. Since the stripper 58b still presses the work w during that time, the work w does not bite into the punch punch 58a.

[0014]

In the press working apparatus 30 described above, the turning cam 36 is used in the shift-bending part 30a, and the turning cam 36 is not used in the punching part 30b. As illustrated in FIG. 3, 2 is provided at the end of one work w.
When the flanges f1 and f2 are bent closer to each other and punched at an intermediate position between them, two rotations 36 and two rotation cam holders 34 are manufactured, and the relative positional relationship between them is determined. It 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 becomes high. According to the present invention, when the two flanges f1 and f2 are bent to be bent and a hole is drilled at an intermediate position between them, the rotary cam required for bending the two flanges f1 and f2 to be bent is 1
Realize the technology that can be a continuous cam of books.

[0015]

According to the present invention, by providing a rotary cam with a punching die that cooperates with a punching punch, the rotation required to shift and bend a plurality of flanges. The cam is one continuous cam. In this case, the punching die is provided at the intermediate position of the rotating cam. However, simply providing the punching die at the intermediate position of the rotating cam cannot achieve satisfactory processing. When the punch punch approaches the rotary cam and cooperates with the punch die, the punch punch may not be inserted into the punch die provided on the rotary cam, resulting in damage to the punch die. Because. The processing apparatus of the present invention includes a rotary cam holder having a supporting surface for supporting a plate-shaped work, a rotary cam holder rotatably mounted on the rotary cam holder, and a position adjacent to each other in the longitudinal direction of the biased bending part. A rotating cam having a punching die formed on the upper surface, a pad that can be moved up and down, and a pad that positions a workpiece between the supporting surface of the rotating cam holder and a pad that can be moved up and down. It is possible to slide in the direction, and it is equipped with a bending blade and a punch punch that is formed at a position adjacent to the bending blade in the longitudinal direction. An upper suspension cam for performing the bending and punching is provided, and a regulation unit for restricting the rotation of the rotary cam with respect to the rotary cam holder before starting the bending and the punching at the end of the work.

In the press working apparatus of the present invention, a single turning cam is provided with an approach bending portion for performing an approach bending process and a punching die for performing a punching process continuously in the axial direction. Before the work is positioned and the press working is started, the rotation cam is locked at a predetermined rotation angle by the regulating means. As a result, the position of the rotating cam does not move, and during punching, the punching punch does not ride on the punching die formed on the rotating cam.
Mold damage can be prevented. Further, since one continuous rotating cam can perform the bending and punching, the working efficiency can be improved and the manufacturing cost can be reduced. Product accuracy is also improved.

If the upper suspension cam is formed with a guide post extending in the sliding direction and the rotating cam is formed with a guide post hole extending in the sliding direction at the turning angle at the time of processing, the turning cam rotates. It is possible to easily provide the regulation means for regulating the.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION (Mode 1) The tip of the guide post is tapered so that it can be inserted into the guide post hole even if the turning angle of the turning cam is deviated. When inserted, the turning cam is adjusted to a predetermined turning angle.

[0019]

EXAMPLES (Intermediate Technology Tried Before Completion of the Present Invention) For convenience of explanation, a technology attempted at an intermediate stage leading to completion of the present invention will be described first. This intermediate technology is not the conventional technology defined by the Patent Law. The present inventor uses one continuous rotary cam for processing the shape shown in FIG. 3, that is, for bending and bending a plurality of flanges f1 and f2 and punching at an intermediate position between them. I tried to do it. In this case, a shift bending portion for shift bending the two flanges f1 and f2 is provided on both sides of one continuous rotary cam, and a punching die is provided at an intermediate position thereof.

FIG. 6 shows a cross section at the position of the punching die of the press working apparatus 70. The press working device 70 includes a lower die 72, and a rotating cam holder 74 is supported by the lower die 72. In this rotating cam holder 74,
A cam groove 74a having an arc surface and a support surface 74b for supporting the work w are formed. This rotating cam holder 74
A rotary cam 76 is rotatably housed in the cam groove 74a. A U-groove 76a extending in the axial direction is formed on the rotating cam 76, and a side surface 76b for supporting the work w from below is formed on the outer surface in the vicinity thereof. A punching die 76c is formed continuously with the side surface 76b. At a position adjacent to both sides of the punching die 76c in the axial direction, a bending portion 76d extending at a predetermined angle is formed. A slide plate 76e for guiding the upper suspension cam 78 to the rotating cam 76 side is attached at a position facing the punching die 76c and the approach bending portion 76d.
6e rotates together with the rotating cam 76 and also serves as a stopper for clockwise rotation in the drawing. When the rotating cam 76 rotates clockwise in the drawing and the slide plate 76e contacts the wall surface 74c of the rotating cam holder 74, the side surface 76b of the rotating cam 76 is continuous with the support surface 74b of the rotating cam holder 74. It is shaped to

Above the supporting surface 74b of the rotating cam holder 74 and the side surface 76b of the rotating cam 76, a pad 80 supported by an upper mold holder (not shown) so as to be able to move up and down is arranged, and the pad 80 descends together with the upper mold holder. Then the rotating cam holder 7
4 is in surface contact with the continuous surface of the supporting surface 74b of No. 4 and the side surface 76b of the rotating cam 76. Accordingly, the pad 80, the support surface 74 b of the rotating cam holder 74, and the side surface 76 of the rotating cam 76.
It is possible to position the workpiece w by sandwiching it with the workpiece b.

The above-mentioned hanging cam 78 is attached to the inclined surface 82a formed on the upper die 82 via the 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 descends. A punch punch 78a is formed on the rotary cam 76 side of the upper hanging cam 78, and a stripper 78b made of an elastic member is provided around the punch punch 78a.
Is provided. The punch punch 78 a corresponds to the punch die 76 c formed on the rotating cam 76. Also,
The punching punch 7 is provided on the rotation cam 76 side of the upper suspension cam 78.
8a at positions adjacent to both sides in the axial direction,
c is formed, and the bending portion 76d of the rotating cam 76 is formed.
And surface contact via the workpiece w.

The procedure for performing the bending and punching and the punching by the rotating cam mechanism are as follows.
The plate-shaped work w is placed on the support surface 74b of the rotating cam holder 74. Pad 8 supported by an upper mold holder (not shown)
When 0 starts to descend, the rotating cam 76 rotates clockwise in the drawing. When the slide plate 76e contacts the wall surface 74c of the rotating cam holder 74, the rotating cam 76 stops rotating,
At this time, the supporting surface 74b of the rotating cam holder 74 and the side surface 76b of the rotating cam 76 form a continuous surface, and both support the work w from below. In this state, the pad 80 comes into contact with the work w from above, and the support surface 74b of the rotating cam holder 74 is contacted.
The workpiece w is sandwiched and positioned together with the side surface 76b of the rotating cam 76.

When the upper hanging cam 78 moves down together with the upper die 82, the upper hanging cam 78 slides toward the rotating cam 76 by being guided by the slide plates 76e and 82b. Along with that, the bending blade 78c formed on the upper suspension cam 78 is
The pad 80 and the supporting surface 74b of the rotating cam holder 74 and the side surface 76b of the rotating cam 76 come into contact with the end portion of the workpiece w positioned. Further, the upper hanging cam 78 slides toward the rotating cam 76 side while bending the end of the work w downward along the approach bending part 76d, and eventually the end bending part 76d of the turning cam 76 is sandwiched across the end of the work w. Abut. As a result, the end of the work w is bent to a predetermined bending angle.

As the upper suspension cam 78 slides, the punch punch 78a formed on the upper suspension cam 78 approaches together with the stripper 78b, as does the shifting bending blade 78c. Since the tip of the stripper 78b protrudes toward the rotating cam 76 side more than the tip of the punch punch 78a, the stripper 78b comes into contact with the end of the positioned work w before the punch punch 78a. The peripheral edge of a predetermined drilling position at the end is pressed. Further, the upper hanging cam 78 slides to the punching punch 7 at a predetermined drilling position at the end of the work w.
The tip of 8a abuts and makes a hole. As a result, the end of the work w is punched at a predetermined position. The circular scrap generated by the punching process is discharged to the outside from the 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 die holder side (not shown) by a spring (not shown). With the rise of 82, each is returned to the position before processing. The rotating cam 76 was rotated clockwise in the drawing at the time of processing, but after the processing is completed, it is rotated counterclockwise in the drawing and returned to the position before processing. Further, when the punch punch 78a separates from the work w, the stripper 78b still presses the work w toward the rotating cam, so that the work w does not bite the punch punch 78a.

According to this press working apparatus, it should be possible to perform the bending and bending of the two flanges f1 and f2 by utilizing one continuous rotating cam, and punching at the intermediate position between them. Does not work. Since the clearance between the side surface of the rotating cam and the arc surface of the rotating cam holder, which is required for the rotating cam 76 to rotate, is larger than the clearance between the punching die and the punching punch, There is a case in which the rotation shaft of the rotation cam is shaken and the position of the punching die is shaken, and the punching punch rides on the punching die. This causes a problem that the punch for punching damages the rotary cam, which makes it difficult to perform favorable punching.

(Completed Embodiment) An embodiment completed through the above intermediate technique will be described with reference to FIGS. 1 and 2. The press working apparatus 10 shown in FIG. 1 includes a lower die 12, and the lower die 1
Reference numeral 2 supports the rotating cam holder 14. The rotating cam holder 14 is provided with a cam groove 14a having an arc surface and a support surface 14b for supporting the work w. A rotary cam 16 is rotatably housed in the cam groove 14 a of the rotary cam holder 14. A U-groove 16a extending in the axial direction is formed on the rotary cam 16, and a side surface 16b for supporting the work w from below is formed together with a supporting surface 14b of the rotary cam holder 14 on the outer surface in the vicinity thereof. This side 16
A punching die 16c is formed continuously with b, and a bending portion 16d extending at a predetermined angle is formed at a position adjacent to both sides of the punching die 16c in the axial direction. A slide plate 16e for guiding an upper hanging cam 18 to be described later to the rotating cam 16 side is attached at a position facing the punching die 16c and the approach bending portion 16d. It rotates and also functions as a stopper for clockwise rotation in the figure. When the rotating cam 16 rotates clockwise in the drawing and the slide plate 16e contacts the wall surface 14c of the rotating cam holder 14, the side surface 16b of the rotating cam 16 is continuous with the supporting surface 14b of the rotating cam holder 14. It is shaped to

Above the supporting surface 14b of the rotary cam holder 14 and the side surface 16b of the rotary cam 16, a pad 20 supported by an upper mold holder (not shown) so as to be able to move up and down is arranged. Support surface 1 of cam holder 14
4b and the continuous surface of the side surface 16b of the rotating cam 16 are in surface contact with each other. As a result, the workpiece w can be sandwiched and positioned between the pad 20, the support surface 14b of the rotary cam holder 14 and the side surface 16b of the rotary 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 work w. The punch punch 18 is provided in the stripper portion 20a.
A substantially cylindrical hole having a diameter larger than the outer diameter of a is provided.

The above-mentioned hanging cam 18 is attached to the inclined surface 22a formed on the upper die 22 via the 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 descends. A punch punch 18a supported by a retainer 18b is formed on the rotary cam 16 side of the upper suspension cam 18, and the punch punch 18a is provided on the rotary cam 1 side.
It corresponds to the punching die 16c formed in No. 6. In addition, the punching punch 18 is provided on the rotation cam 16 side of the upper suspension cam 18.
A bending blades 18c are formed adjacent to a on both sides in the axial direction, and the bending portion 16d of the rotating cam 16 and the work w are formed.
Surface contact via. It should be noted that the tip of the approaching and bending blade 18c is slightly rotated as compared with the tip of the punch punch 18a.
It projects to the 6 side.

A substantially cylindrical guide post 18d is provided on the lower die side of the upper suspension cam 18 in parallel with the punch punch 18a toward the rotary cam 16 side. Rotating cam 1
The guide post 18 is provided at a position facing the side surface 16 b of the reference numeral 6.
The guide post hole 16f corresponding to d is formed,
A guide post bush 16g is attached to the inner wall of the guide post hole 16f. In addition, guide post 1
The tip of 8d projects toward the rotary cam 16 side from the tip of the punch 18a and the tip of the approaching bending blade 18c.

The procedure for performing the bending and punching and the punching by using such a rotating cam mechanism are as follows.
The plate-shaped work w is placed on the support surface 14b of the rotating cam holder 14. Pad 2 supported by an upper mold holder (not shown)
When 0 starts to descend, the rotating cam 16 rotates clockwise in the drawing. When the slide plate 16e comes into contact with the wall surface 14c of the rotating cam holder 14, the rotating cam 16 stops rotating,
At this time, the support surface 14b of the rotary cam holder 14 and the side surface 16b of the rotary cam 16 form a continuous surface, and both support the work w from below. In this state, the pad 20 contacts the work w from above, and the support surface 14b of the rotating cam holder 14 is contacted.
The workpiece w is sandwiched and positioned together with the side surface 16b of the rotating cam 16. FIG. 1 shows this state.

When the upper hanging cam 18 descends together with the upper die 22, the upper hanging cam 18 slides toward the rotating cam 16 by being guided by the slide plates 16e and 22b. Along with that, the guide post 1 formed below the upper hanging cam 18
8d is inserted into the guide post hole 16f of the rotating cam 16 whose rotation is completed. 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 turning angle of the turning 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. The guide post bush 16g is a consumable item and wears due to repeated insertion of the guide post 18d, but can be easily replaced. Further, the guide post hole 16f is provided with an air vent hole 16h communicating with the outside.

When the guide post 18d is inserted up to the middle of the guide post hole 16f as the upper suspension cam 18 slides, the upper suspension cam 18 like the guide post 18d.
The bending and bending blade 18c formed on the abutting portion abuts on the end of the work w positioned by the pad 20, the supporting surface 14b of the rotating 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 side while bending the end portion of the work w downward along the bending portion 16d, and eventually the rotating cam 16 sandwiching the end portion of the work w.
It comes into contact with the bent portion 16d. As a result, the end of the work w is bent to a predetermined bending angle.

As the upper suspension cam 18 slides, the punch punch 18a formed on the upper suspension cam 18 abuts on the end of the positioned work w, like the guide post 18d and the side-bending blade 18c. The stripper portion 20a of the pad 20 is in contact with the punching die 16c via the work w, and holds the peripheral edge of the work w at a predetermined drilling position. The punch punch 18a is used for the stripper portion 2
It is inserted without contacting the inner wall of the hole provided in 0a. Further, the upper suspension cam 18 slides, and the tip of the punch punch 18a comes into contact with a predetermined hole-drilling position at the end of the work w to make a hole. As a result, the end of the work w is punched at a predetermined position. The circular scrap produced by punching passes through the scrap groove 14d formed in the rotary cam holder 14 into the scrap hole 14e by its own weight and is discharged to the outside.

The upper suspension cam 18 is urged to the right side in the drawing by a spring (not shown), and the pad 20 is urged to the upper mold holder side (not shown) by a spring (not shown). As they are moved up, they are returned to their original positions. The rotating cam 16 was rotated clockwise in the drawing by an air cylinder (not shown) during processing, but after the processing is completed, it is rotated counterclockwise in the drawing and returned to the position before processing. Further, when the punch punch 18a separates from the work w, the work w does not bite the punch punch 18a because the stripper portion 20a presses the work w toward the rotation cam 16 side.

The operation timing of the press working apparatus 10 of this embodiment is as follows. (1) When the pad 20 starts descending, the rotating cam 1
6 rotates. (2) The rotation of the rotation cam 16 is stopped to position the work w. (3) The upper suspension cam 18 descends and slides to 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 approach bending blade 18c contacts the work w to start the approach bending process. (6) The punch punch comes into contact with the work w to start punching. (7) The bottom dead center of the press is reached, and the bending and punching are completed. (8) The upper suspension cam 18, the rotating cam 16, and the pad 20 are returned to the positions before processing.

Conventionally, there has been a case where a problem occurs when press-working is performed by providing one rotating cam with a biased bent portion and a punched portion. That is, in order for the rotary cam to rotate within the cam structure of the rotary cam, a certain degree of tolerance of the rotary shaft of the rotary cam is required. By increasing this tolerance, the blurring caused by the rotation of the rotation cam increases. Since the minimum required tolerance for the rotating cam to rotate is larger than the clearance between the punch and punch, the slight deviation of the rotating cam will not determine the position of the punch and In some cases, the punch punch rides on the punching die and damages the die.

However, according to the press working apparatus of the present embodiment, the guide post is inserted into the guide post hole provided in the turning cam before performing the bending and punching and the turning operation. The rotation of the cam is restricted. Therefore, the position of the punching die of the rotary cam is determined, and the punching process can be favorably performed without causing a problem that the punching punch rides on the punching die and damages the die.

In the press working apparatus of the present invention, the turning cam mechanism composed of one turning cam can perform the bending and punching at the end of the work at the same time. As a result, the working efficiency of the press working can be improved, and the cost can be reduced. Further, no deviation occurs between these processing steps, and product accuracy is improved.

Specific examples of the present invention have been described above in detail, 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. Further, the technical elements described in the present specification or the drawings are
The technical usefulness is exhibited alone or in various combinations, and is not limited to the combinations described in the claims at the time of filing. In addition, the technique illustrated in the present specification or the drawings achieves a plurality of purposes at the same time, and achieving the one purpose among them has technical utility.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a punched portion of a press working apparatus according to this embodiment.

FIG. 2 is a vertical sectional view of a punched portion of the press working apparatus according to the present embodiment.

FIG. 3 is a perspective view of a work end portion after processing.

FIG. 4 is a vertical cross-sectional view of a bending section of a conventional pressing device.

FIG. 5 is a vertical cross-sectional view of a punched portion of a conventional pressing device.

FIG. 6 is a vertical cross-sectional view of a punched portion of a conventional pressing device.

[Explanation of symbols]

w: work 10: Press processing equipment 12: Lower mold 14: Rotating cam holder 14a: cam groove 14b: support surface 14c: wall surface 14d: groove for scrap 14e: Scrap hole 16: Rotating cam 16a: U groove 16b: side surface 16c: Hole punching die 16d: bent portion 16e: slide plate 16f: Guide post hole 16g: Guide post bush 16h: Air vent hole 18: Suspended cam 18a: punch punch 18b: retainer 18c: Bending blade 18d: Guide post 20: Pad 20a: Stripper part 22: Upper mold 22a: inclined surface 22b: slide plate

Claims (2)

[Claims] 1. A rotary cam holder having a support surface for supporting a plate-shaped work, and a rotary cam holder rotatably mounted on the rotary cam holder, the shift bending portion being formed at a position adjacent to the shift bending portion in the longitudinal direction. A rotating cam having a punched die, which can be moved up and down, and a pad for positioning by sandwiching a plate-like work between the support surface of the rotating cam holder, and a pad that can be moved up and down, in the lateral direction at bottom dead center. It is possible to slide, and is equipped with a shifting bending blade and a punch punch formed at a position adjacent to the shifting bending blade in the longitudinal direction, and slides to the rotating cam side to shift to the end of the plate-shaped work. A press having an upper suspension cam that performs bending and punching, and a regulation unit that regulates the rotation of the rotary cam with respect to the rotary cam holder before starting the bending and punching to the end of the workpiece. Processing equipment. 2. A guide post extending in the sliding direction is formed on the upper hanging cam, and a guide post hole extending in the sliding direction is formed on the turning cam at a turning angle during processing. The press working apparatus according to claim 1.