JPS58176027A - Press die - Google Patents

Abstract

PURPOSE:To perform flange working and piercing by one process by providing a flange forming section that performs flange working in cooperation with the flange forming section of a lower die and a slide cam provided with a piercing punch that performs piercing in cooperation with the button die of the lower die. CONSTITUTION:The system is provided with a flange forming section 3b, a button die 26 fixed to the above, a lower die 24 having a slide cam sliding face 24b, a pad 31 elastically supported to an upper die 22 and a driving cam 21 fixed to the upper die 22. Further, it is provided with a sliding face 23a held by the pad 31 allowing sliding and engaged with the drive cam sliding face 24b on one side, and a sliding face 23c that is engaged with the slide cam sliding face 23a in the lower part. A flange forming section 23b that performs flange working of a work W in cooperation with the flange forming section 4a of the lower die 24 and a slide cam 23 having a piercing punch 27 that performs piercing of the work W in cooperation with the button die 26 of the lower die 24 are provided in another side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press mold that performs flanging and drilling in one step.

Generally, in order to flange bend and drill a hole in one workpiece, either first drill the hole and then flange it in the machining process, or drill the workpiece after 7-lunging in the machining process. It was either. The former is a machining method that does not require much precision because there is a risk that the previously drilled hole may be misaligned or the hole may be deformed, and the superior machining method is usually used. A conventional example of a press mold for carrying out such a processing method is shown in FIG. 1.2.

1 is a sectional die attached to the upper holder 2; 3 is a pad held on the upper holder 2 by a retainer (not shown); an elastic body 4 is interposed between the pad 1 and the upper holder 2; 5 is a punch fixed to a bolster (not shown).

Now, when the workpiece N is placed on the punch 5 and the upper holder 2 descends, the pad 3 first comes into contact with the workpiece W and stops the descent, and then the upper holder 2 compresses the elastic body 4 and When descending, the pad 3 presses the workpiece W against the punch 5, and the secondary die 1 descends, collaborating with the punch 5 to bend the workpiece W (also referred to as flange processing).

When the upper holder 2 rises after the bending process is finished, the upper holder 2
As the sectional die 1 fixed to the sectional die 1 rises together and moves away from the workpiece W, the compression of the elastic body 4 is released, and the pad 3 that had been pressing the workpiece W also moves away from the workpiece W and rises, causing the workpiece W to move away from the mold. taken outside.

Next, Fig. 2 shows a cam piercing die that makes holes in the processing process.

11 is a drive cam fixed to the upper holder 12; 13 is a slide cam that is equipped with a piercing punch 14 and slides on the lower die 15; a sliding surface 13a that engages with the sliding tl la of the drive cam; It is formed. 16 is a pad held on the upper holder 12 by a glue taker (not shown);
An elastic body 17 is interposed between the body 12 and the body 12 . 18 is a punch provided with a button die 19 fixed to the die 15.

Now, punch 18 on the workpiece W that has already been machined with 7 lunges.
When the upper holder 12 descends after being placed on the workpiece W, the pad 16 first comes into contact with the workpiece W and stops descending. When the upper holder 12 further descends while compressing the elastic body 17, the pad 1
6 is further pressed onto the workpiece wl punch 18, and the drive cam 11 fixed to the upper punch 12 is lowered so that its sliding surface 11a becomes the sliding surface 13a of the slide cam 13.
As a result of the collision with the slide cam 13, the piercing punch 14
At the same time, the piercing punch 14 slides on the lower mold 15 in the direction indicated by the arrow, and therefore, the piercing punch 14 cooperates with the button die 19 to punch a hole in the workpiece W.

When the upper holder 12 is raised together with the drive cam 11 after the drilling process is completed, the slide cam 13 is slid back to the initial position by a return mechanism (not shown), such as a return spring, and the pad 16 is moved back to the elastic body 17. When the compression is released, it is held by the upper holder 12 by a glue taker (not shown) and rises.

However, with the above processing methods,
In this case, it is not possible to perform flanging and drilling in the same process, which causes various disadvantages.

This invention aims to provide a method for performing 7-lung machining and drilling in the same process, which includes a flange forming part, a button die fixed to the flange forming part, and a slide cam sliding surface. a lower mold, a pad elastically supported on the ram of the press or the upper mold, a drive cam fixed to the ram of the press or the upper mold, and a sliding portion of the drive cam that is slidably held on the pad and on one side Equipped with a sliding surface that engages with the moving surface, downward! #2: Front 2: A flange forming section that has a sliding surface that engages with the ride cam sliding surface, and that cooperates with the 7 flange forming sections of the lower mold to perform flanging of the workpiece on the other side, and the lower flange forming section. The present invention aims to solve the above problem by providing a press mold having a slide cam equipped with a piercing punch that cooperates with the button die of the mold to punch holes in a workpiece.

The present invention will be explained below based on the drawings.

FIG. 3 is a diagram showing an embodiment of the present invention.

First, to explain the structure, 21 is a drive cam fixed to the upper die 22, 23 is a slide cam that slides on the lower die 24 via the wear plate 25, and the sliding surface of the drive cam 21 is on the right side in the figure. Sliding surface 23a that engages with 21a
On the left side, there is formed a 7-lunge forming part 23b that cooperates with the flange forming part 24a of the lower die 24 to form the workpiece W in 7-lunges.

27 is a piercing punch that is attached to the slide cam 23 and punches a hole in the workpiece W in cooperation with the button die 26 fixed to the lower mold 24; 28 is slidably provided on the flange forming portion 23b of the slide cam 23; The cam pad is biased in the direction of arrow X by a spring 29 and whose position is regulated by a keeper 30.

A pad 31 is held on the upper mold 22 by a retainer bin 32 so as to be slidable by a distance C in the vertical direction, and is in sliding contact with the upper mold 22 by a wear plate 33. There is an interposition in between. Further, the pad 31 holds the slide cam 23 from both sides via a gib 35, and a return spring 36 of the slide cam 23 is interposed between the pad 31 and the slide cam. 31a
is a stopper portion of the slide cam 23 which is urged in the direction opposite to the arrow X by the spring 36.

A pad 37 is supported by the upper mold 22 by a retainer pin 38, and a spring 39 is interposed between the pad and the upper mold.

Next, the effect will be explained.

When the mold is now open and the upper mold 22 is near the top dead center, the bottom surface of the slide cam 23 is above the lower mold 24. Then, when the workpiece material is placed on the upper surface of the flange forming part 24a of the lower die 24 and the upper die 22 descends, the pad 37 first comes into contact with the workpiece WK and stops the descent, and the upper die 22
Start compressing 9.

On the other hand, the pad 31 and the slide cam 23 are also lowered together with the upper die 22, and first the bottom surface of the flange forming portion 23b of the slide cam 23 comes into contact with the workpiece W. At this point the spring 39 will be compressed to some extent and the pad 3 will be compressed accordingly.
7 strongly presses the workpiece W against the lower die 24.

Next, when the upper mold 22 further descends, the slide cam 2
3 descends while flanging the workpiece with the flange forming part 23b, and passes through the wear plate 25 to the lower die 24.
As the elastic body 34 comes into contact with the upper die 22, it begins to be compressed by the upper die 22. At this time, the sliding surface 21a of the drive cam 21 that has descended together with the upper mold 22 begins to come into sliding contact with the sliding surface 23a of the slide cam 23, and the slide cam 23 is pushed against the elasticity of the return spring 36. and start sliding in the direction of arrow X. Figure 3 is.

The state at this time is shown.

From this point on, when the upper die 22 further descends while compressing the elastic body 34 and reaches the bottom dead center, the drive cam 21 further descends by a distance A, and the slide cam 23 then touches the sliding surface 21a of the drive cam 21. After being pushed, the cam pad 28 is further moved forward by a distance B in the direction of the arrow X, further bending the 7th ridge portion Wa, and compressing the spring 29.
is pressed against the workpiece flange portion Wa. Similarly, the piercing punch 27 attached to the slide cam 23 also has a distance B.
, and cooperates with the button die 26 to make a hole in the flange portion Wa of the workpiece.

Next, when the upper die 22 passes the bottom dead center and the machining is completed and begins to rise together with the drive cam 21, the slide cam 23Vi
It is repulsed by the return spring 36 and begins to retreat in the direction opposite to the arrow X. Then, when the drive cam 21 rises by a distance A, the slide cam 23 moves back by a distance B, and a stopper portion 31alC provided at the lower end of the pad 31
come into contact with

At this time, the retainer pin 32 provided on the upper die 22 is raised by a distance C and is located at a position immediately before lifting the pad 31. Furthermore, the compression applied to the elastic body 341C is released when the upper die 22 rises by a distance C, so the pad 31 and the slide cam 23 have been pressed together by the lower die 24 up to this point. There will be.

In addition, the above-mentioned operation of each part (communicating distance A).

The mutual relationship between B and C is A = B Ia11θ==c+
S-foot: Decided to play C. Here, θ is the sliding surface 21
a and 23a are the angles formed with the horizontal plane.

Next, after the above-mentioned time, the pad 31 holding the slide cam 23 is lifted by the upper mold 22 via the retainer pin 32, and the slide cam 23 is separated from the slide cam sliding surface 24b of the lower mold 24.

On the other hand, when the pad 31ri and the bottom surface of the slide cam 23 move above the workpiece W position, the compression of the spring 39 by the upper mold 22 is released, so that the retainer via 38
The mold is supported by the mold and moves upward away from the workpiece W, and each part returns to the original open state of the mold.

As described above, according to the present invention, the structure is comprised of a lower die including a flange forming part, a button die fixed to the flange forming part, and a slide cam sliding surface, and a ram or upper die of a press. A resiliently supported pad, a drive cam fixed to the ram or upper die of the press, and a sliding WJ slidably held by the pad and engaged with the sliding surface of the drive cam on one side. a flange forming section, which has a sliding surface on the lower side that engages with the sliding surface of the slide cam, and on the other side cooperates with the flange forming section of the lower die to perform flanging of the workpiece; The press type is equipped with a slide cam equipped with a piercing punch that works in cooperation with the button die to punch holes in the workpiece, which has the effect of accurately performing flange processing and drilling in one process. is obtained.

[Brief explanation of drawings]

Figure 1 is a sectional view of the main parts of a conventional flange processing press die.
Figure 2 is a cross-sectional view of the main parts of a conventional press die for drilling,
FIG. 3 is an explanatory cross-sectional view of one embodiment of the present invention. 21... Drive cam 21a... Sliding surface 22... Upper die 23... Slide cam 23a... ...Sliding surface 23b--7 Lunge sensing portion 23c...Sliding surface 24...Lower die 24a...Flange forming part 24b...Slide cam sliding surface 26...
...Button die 27...Earring punch 31...Pad W...Work

Claims (1)

[Claims] A lower die comprising a flange forming part, a button die fixed to the flange forming part, and a slide cam sliding surface, a pad elastically supported on the ram of the press or the upper die, and a drive fixed on the ram of the press or the upper die. a cam, a sliding surface that is slidably held by the pad and that engages with the sliding surface of the drive cam on one side, and a sliding surface that engages with the sliding surface of the slide cam on the lower side; a flange forming part that cooperates with the flange forming part of the lower die to form a flange on the workpiece, and a pierced earring that cooperates with the button die of the lower die to form a hole in the workpiece. A press mold having a slide cam equipped with a punch.