JPS61135446A - Work supporting device for trimming device - Google Patents

Abstract

PURPOSE:To eliminate the rotation of a work in the stage of trimming and to work the work with surface directivity in a device for grasping the work by means of upper and lower dies moving relatively vertically in the axial direction by constituting specifically a guide of the lower die. CONSTITUTION:The guide 6 of the lower die 11 is constituted to move vertically in the axial direction and is so constituted that the guide 6 rises to fit to the bottom surface side of the work 1 and supports the same while the work 1 is fixed by a supporting jig 2. The upper die 17 descends to expand forcibly the jig 2 after the supporting by the guide 6. Then a pilot pin 12 and a knock- out 14 contact with the work 1 so that the work 1 is grasped by means of the knock-out 14 and the guide 6. The rotation of the work 1 is thus prevented and the easy and sure trimming of the work 1 is made possible.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a workpiece support that prevents the workpiece from shifting due to rotation when trimming the workpiece that has been drawn in a transfer press. It is related to the device.

[Conventional technology]

2. Description of the Related Art As a trimming device for removing the brim of a molded product, a structure shown in FIGS. 2 to 4 is conventionally known. Figure 2 is a schematic cross-sectional view of a conventional trimming device.
Figure 3 is a sectional view taken along line A-h/fJ. Figure 4 is a partially enlarged view of the support jig 2, (A) is a plan view, and (B)
is a front view.

The operation will be explained with reference to FIGS. 2 to 4. A disc-shaped workpiece 1 having an uneven surface that has been drawn in a transfer press is sent to a mounting portion 22 of a support jig 2 by a transfer grip. The position of the workpiece 1 that has been sent is determined by placing and fixing the workpiece 1 on a portion of the mounting portion 22 of the support jig 2 that is opened so that the workpiece 1 can fit therein. After the workpiece 1 is placed, the upper mold 17 is lowered.

As the upper die 17 descends, the pilot pin 12 that protrudes first is inserted into the center hole 1a of the workpiece l.

The pilot pin 12 stops descending after contacting the workpiece 1, but as the upper mold 17 continues to descend, the spring 8d is compressed and fitted into the knockout 14. Next, the cam 13 comes into contact with the push-open portion of the support jig 2. The tip of the cam 13 and the push-opening part of the support jig 2 are sloped surfaces, and when these surfaces are displaced by the positive downward movement of the cam after contact, the support jig 2 is pushed horizontally to the left and right. As the support jig 2 is pushed out, the workpiece 1 is released from the support jig 2 and supported by pilot bin formation and knockout. Next, the knocker (LX) comes into contact with the workpiece 1, and the workpiece 1 is pushed down, and the knockout machine is also pushed down, causing the spring 8 to be compressed.

The collar portion 1b is held down by the pin 16, and the workpiece 1 is held between the knockout 14 and the guide 6al'C. Next, the punch plate 1, which is connected to the Gui cushion, is held by the knocker (20), and the shade 9a, trimming punch 10a, and guide 6a, which are fixed to the punch plate (18), are lowered until the punch plate (1) contacts the block 19. . and bunch play)
When the block 18 and the block east come into contact, the spring 8b is compressed and the knockout 14 is further fitted into the trimming die 15 and machined. Spring 8c is compressed and pin 16 is retracted. When the upper mold 17 has completely lowered to the bottom dead center, the flange portion 1b is sheared off and removed by the intersection of the trimming die 15 and the trimming punch 10a. When the workpiece 1 is sheared, the support jig 2 is simply pushed apart by a pair of shear dies consisting of an upper die and a lower die and comes into contact with the cam 13. The removed collar 1b is pushed downward by the pin 16 and is stacked on the shoe 9a. The circular flange lb with a notch in the center will remain caught on the shoe 9a, so the tip of the chute eaO is made into a wedge shape, and when the trimming die 15 and the flange 1b come into contact, the tip of the shoe 9a Cut it in half with a knife so that it branches. The cut flange portion 1b is pushed downward by the pin 16 due to the reaction force of the spring 8C, and is completely separated from the workpiece 1 and falls.

After removing the flange portion 1b, the upper mold 17 is raised. As the cam 13 rises, the support jig 2 is pulled back by the reaction force of the spring 8e, and the machined workpiece 1 is placed on the placement portion 22 of the support jig 2. The processed workpiece 1 is sent to the next process by the transformer 7 grip, and a new workpiece is carried in and the process described above is carried out.

[Problem that the invention seeks to solve]

However, in such a conventional trimming device, the support jig 2 is pushed out before the workpiece 1 is fitted into the guide 6a, and only the center hole 1a is supported by the pilot pin 12 and the knockout. Since the workpiece 1 is fitted into the guide 6a at the knock-out position 14, the workpiece is securely held and fixed from the time the workpiece is released from the support jig 2 until it is held between the knockout 14 and the guide 6a. Therefore, when trimming the workpiece, the workpiece rotates, resulting in a large number of defective products in the case of a directional workpiece.

[Means for solving problems]

In the present invention, the guide 6 of the lower mold n is configured to move up and down in the axial direction, and when the workpiece 1 is fixedly supported by the support jig 2, the guide 6 rises and guides the workpiece 1 to the lower surface side. 6 fits into and supports the workpiece 1.
This prevents the support position from shifting.

[Effect]

According to the present invention, when the workpiece 1 is fixedly supported by the support jig 2, the guide 6 is fitted and supported inside the workpiece 1, and then the upper mold 1 is lowered and the support jig 2 is pushed out to form a pilot bin and the knockout 14 comes into contact with the workpiece 1, and the workpiece 1 is held between the knockout 14 and the guide 6, thereby preventing the workpiece from rotating 10 times.

〔Example〕

FIG. 1 is a schematic sectional view of a trimming device according to an embodiment of the present invention, and in the following description of the embodiment, the same reference numerals as in the conventional example indicate the same or equivalent parts.

In FIG. 1, a disk-shaped workpiece with unevenness, which has been drawn using a transfer press, is sent to a mounting portion 22 of a support jig 2 by a transfer grip.

The position of the delivered workpiece 1 is determined by placing and fixing the workpiece 1 on a portion of the mounting portion 22 of the support jig 2 that is opened so that the top of the workpiece fits therein. After the workpiece 1 is placed, fluid is supplied from the supply lip to the fluid chamber 3, and the piston 5 is raised by the pressure of the fluid. As the piston 5 rises, the guide 6 connected to the piston 5 also rises at the same time. The guide 6 is fitted into the lower surface side of the workpiece 1 fixed to the support jig 2. At this time, the center hole 1 of the workpiece 1
At step a, the knockout 7 is pushed down and the spring 8 is compressed. After the guide 6 completely fits into the lower surface of the workpiece 1 and supports the workpiece 1, the upper mold 17 is lowered.

As the upper die 1f descends, the pilot pin 12 that protrudes first is inserted into the center hole 1aK of the workpiece 1. After the pilot pin 12ij comes into contact with the workpiece 1, it stops descending, but as the upper mold 17 continues to descend, the spring 8d is compressed and the pilot pin 12ij is fitted into the knockout 14. Next, the cam 13 contacts the push-open portion 23 of the support jig 2.

The tip of the cam 13 and the push-opening portion of the support jig 2 are sloped, and when these surfaces are displaced by the lowering of the cam 13 after contact, the support jig 2 is pushed horizontally to the left and right. As the support jig 2 is pushed out, the workpiece 1 is released from the support jig 2 and is supported by the bi-rod pin 12, the knockout 7, and the guide 6. Next, the knock-out roller No. 1 comes into contact with the workpiece 1, and the workpiece 1 is held between the knockout 14 and the guide 6. and pin 16
The collar portion 1b is pressed down. Next, the fluid in the fluid chamber 3 is compressed and the guide 6 descends until it comes into contact with the trimming punch 1o. The trimming punch 10 and chute 9 are fixed and do not operate. After the guide 6 and the trimming punch 10 come into contact, the spring 8b is compressed and the knockout 14 is further fitted into the trimming die 15. Spring 8c is compressed but 716 is retracted. Upper die II7 lowers to the bottom dead center and b trimming die 1
By the intersection of 5 and trimming punch 10, the collar part 11)
is sheared and removed. When the support jig 2 is shearing the workpiece, it is simply pushed apart by a pair of shear dies consisting of an upper die and a lower die and comes into contact with the cam housing. The removed collar portion 1b is pushed downward by the pin 16 and stacked on the chute 9. The circular brim $lb with a notch in the center is caught in the chute 9 up to this point t, so the tip of the chute 9 is wedge-shaped, and the trimming die 15 and the brim 11:J come into contact. When doing so, cut it in half at the tip of chute 9 so that it branches. The cut flange portion l) is pushed downward by the flanges 16 by the reaction force of the spring 8c, and is completely separated from the workpiece 1 and falls.

After removing the flange portion 1b, the upper mold 17 is raised. As the upper mold 17 rises, the compressed fluid in the round fluid chamber 3 returns to its original state, and the piston 5 rises, returning to the position where the guide 6 is fitted into the workpiece 1. As the cam rises, the support jig 2 is pulled back by the reaction force of the spring 8a, and the machined workpiece 1 is placed on the placement portion 22 of the support jig 2. Until this point, fluid is supplied to the fluid chamber 3 and the guide 6 remains fitted inside the workpiece 1. And support jig 2
When the workpiece 1 is placed, fluid is supplied from the fluid supply port 4a to the fluid chamber 3a, and the fluid in the fluid chamber 3 is discharged. As a result, the piston 5 moves downward, and the piston 5
The guide 6 connected to the workpiece 1 also descends, and the guide 6 separates from the workpiece 1. The processed workpiece is sent to the next process by the transfer grip, and a new workpiece is carried in and the process described above is carried out.

〔Effect of the invention〕

In the present invention, when the workpiece is fixedly supported by a support jig, a guide that moves up and down in the axial direction is fitted into the lower surface of the workpiece to support the workpiece, thereby easily preventing the workpiece from rotating. The effect of reliably trimming a workpiece with directionality can be obtained.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of a trimming device according to an embodiment of the present invention, Fig. 2 is a schematic sectional view of a conventional trimming device, Fig. 3 is a sectional view taken along line A-A, and Fig. 4 is a sectional view of a support jig. A partially enlarged view is shown. 1... Workpiece, 2... Support jig, 6, 6a...
Guide, ll, 21...lower mold, 17...upper mold. Notebook 1 Diagram 2

Claims (1)

[Claims] A pair of shearing dies consisting of a lower die and an upper die that move up and down relative to each other in the axial direction are provided on the upper and lower end surfaces of the workpiece, and the workpiece is clamped by the relative up and down movement of the upper die and the lower die. A trimming device comprising means for shearing the collar of the workpiece by the intersection of the upper die and the lower die, and a support jig that is pushed horizontally from the shearing die to the left and right during the shearing, A workpiece support device for a trimming apparatus, characterized in that when the workpiece is fixedly supported by a support jig, a guide of the lower die is raised to support the workpiece from the lower surface side.