JPS59127929A - Composite press die - Google Patents

Abstract

PURPOSE:To prevent the deformation in a secondary operation part and to improve the accuracy in position, shape, etc. by performing the secondary operation in accordance with the ascending operation of an upper holder upon completion of bending which is a primary operation. CONSTITUTION:When an upper holder 21 descends together with a ram 12, a pad 23 contacts the panel work W on a punch 22 and grasps the same under pressure; at the same time, a driving cam 27 and the sloped cam surface of the 1st sliding cam 33 come into sliding contact with each other, forcing the cam 27 to slide toward the right. When the holder 21 descends further, a die 30 contacts the work W and bends the work. The holder 21 starts ascending upon completion of the bending, then the sloped cam faces 27a, 33a of the cam 27 and the cam 33 come into sliding contact with each other. The cam 33 slides toward the left and the 2nd sliding cam 34 descends upon sliding contact of the cam faces 33c, 34c, then a piercing punch 35 meshes with a button die 26 thereby forming a pierced hole with the secondary operation in a flange part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite press mold that performs two types of processing, for example, 7-lunge bending and piercing in the same process.

For example, flange bending processing and piercing hole processing (pre-piercing processing)
The first press mold is a composite type that performs both in the same process.
There is a structure shown in the figure. As shown in FIG. 2, this is an example of a press die that forms a 7-lunge part F having a bead part B at the end of a panel work W and at the same time makes a piercing hole P. A punch is fixed on the lower holder 2, a pad 3 is elastically supported to the upper holder 4 via a coil spring 5 and a pad retainer 6, and a urethane rubber 8 which is an elastic body and a key pub are also attached to the upper holder 4. A sectional die for primary processing that is elastically supported through a rate 9, and an upper holder 4.
A pierce punch 11 is attached to a secondary processing tool handle held by a punch retainer 10.

Then, as the upper holder 4 descends together with the ram 12, the punch 1 and pad 3 press and hold the panel work W, and then the sectional die 7 contacts the panel work W and moves upward while compressing the urethane 8. By doing so, the sectional die 7 and the punch 1B cooperate to perform 7-lunge bending, which is the primary processing, on the flange portion F.

After that, when the sectional die 7 bottoms out against the upper holder 4 and the bending process by the force of the urethane rubber 8 is completed, the piercing punch 11 and the button die 13 on the punch 1 side are engaged with each other and the piercing hole P Perform secondary processing, pierce hole machining. In this way, when the seven-lunge bending process and the piercing process are completed, the entire upper holder 4 reaches the bottom dead center and rises again at E-, thus completing one cycle.

However, in the above-mentioned press mold, the urethane rubber 8
First, with the sectional die 7 which receives the compression pressure of 7
After the lunge WS y is bent, the piercing punch 11 is used at the latter stage of the lowering operation of the upper holder 4.
Since the mold structure is to drill holes by K, this is not a problem when the bending length of the bead part B is small, but when the bending length of the bead part B is relatively large, the forming reaction force becomes large. Because of this, urethane rubber 8
There is a problem in that the flange part F cannot be completely formed using only the compression pressure of 2, and the pierce hole processing takes place in the flange bending part. That is, when the forming force of the panel work W is large against the compression pressure crab of the urethane rubber 8, the lowermost surface of the sectional die 7 contacts the deepest part of the punch forming surface 1a via the panel work W [7]. First, the urethane rubber 8 is compressed and the sectional die 7 bottoms out against the upper holder 4, so the piercing punch 11 and button die J
3 engages with each other and the piercing hole processing begins, and then, when the upper holder 4 reaches the bottom dead center, the lowest surface of the sectional die 7 comes into contact with the deepest part of the punch forming surface], a (7'). The final bending process is performed on the flange portion F, and as a result, there is a problem in that the previously formed pierced hole P is deformed due to the elongation of the material.

In view of the above-mentioned points, this invention has been made with the aim of preventing deformation of secondary processing parts such as two pierced holes during compound processing, and for this purpose, the present invention has After performing the primary bending process in conjunction with the lowering movement of the holder, the force at the bottom dead center of the upper holder)
The main feature is that the construction allows secondary processing such as shearing and bending force zero processing to be performed in conjunction with the upward movement of the rollers.

Hereinafter, one embodiment of this invention will be described in detail based on this.

Figure 3 shows the Iksho JA sequence of this invention.1. 2 [)
Knife holder, 21id upper holder, 2 is an abbreviated punch fixed on the holder 20, 2: is elastically supported by the upper holder 21 via a pad retainer 24 and a coil spring 25. It's a pad. The punch 22 ij: (As described above, it is equipped with a button die 26 for piercing holes, and its hanging wall portion 22a
As shown in FIGS. 4 and 5, a drive cam 27 that can be slid in the horizontal direction is provided.

The drive cam 27 is provided with first and ff12 tilted cam surfaces 27a and 27b, and is biased toward the left in FIG. 4 by a coil spring 28K.

On the other hand, a gauging 29 is attached to the upper holder 21 so as to be adjacent to the pad 23 . In this casing 29, a sectional die 30, which is a primary processing tool for 7-lunge bending as will be described later, is elastically supported via a keeper plate 31 and a coil spring 32. A first slide cam 33 that can slide and a second slide cam 4 that can slide in the vertical direction are each provided. The first slide cam 33 can slide in a direction perpendicular to the sliding direction of the drive cam 27, and as shown in FIG. 6, one end thereof has inclined cam surfaces 27a and 27b on the drive cam 27 side. First thing to do. Second inclined cam surface: J, :3 a, :(3b
Similarly, a third one-song slope surface; 13C is formed at the other end.

In addition, a second slide cam' (4 is a piercing punch which is a secondary processing tool for controlling Q'i piercing holes) (5 is a punch retainer, which is arranged in several layers via 36,
An inclined cam surface 34C corresponding to the Il:il inclined cam 33c of the first slide cam 331i+11 is formed. Furthermore, the second slide cam: (4 is suspended from the upper holder 21 by the stripper bolt 37, but is always urged upward by the coil spring 38, and as a result, the inclined cam surface, (3Q a'(4(!
They are in contact with each other.

Next, the operation of the press die according to the above structure bv will be explained with reference to FIGS. 7 to 10 in addition to FIG. 3.

First, when the upper holder 21 descends together with the ram 12 from the state shown in FIG. 3, the pad 23 hits the panel work W on the punch 22 and clamps it under pressure, as shown in FIG.
N time Kk8 As shown in the figure, the inclined cam surfaces 27b of the drive cam 27 and the first slide cam 33.

; 33b are in contact with each other VC[1), so that the drive cam 27 resists the force of the coil spring 28 and moves to the 81st
Slide to the right of the diagram. And further upper holder 2
1 descends F, the sectional die 30 contacts the panel workpiece W and starts bending, which is the primary processing, for the 7 flange portion F, and as the bending process progresses, the sectional die 30 releases the coil spring: 32 The flange bending process using the sectional die 30 and the punch 22 is finally completed at the bottom dead center state shown in FIG. In this bottom dead center state, as is clear from FIG. 9, although the sectional die 30 is bottomed out against the casing 29, the piercing punch 35 Il''t' has not yet contacted the panel work W. First slide cam: 33 is the drive cam 2 as the upper holder 21 descends.
By sliding the drive cam 7 to the right in FIG. 8, it will eventually fit over the drive cam 2'7 and fit under it as shown in FIG. 10, thereby causing the inclined cam surface 2'
7b.

The sliding contact between 33b is released, and around 1, the diagonal cams 27a, (3a) come into contact with each other (see FIGS. 5 and 6).

When the upper holder 21 reaches the bottom dead center as described above and the bending process for the flange portion F is completed, the upper holder 21 starts to rise again, and the drive cam 2
7 and first slide cam 33 around 1 oblique force surface 2'/'
a, :33 & are in sliding contact with each other. Then, as shown in FIG. 11, the first slide cam 33 slides to the left in the figure. Second slide cam 33.
34's inclined cam surface 33 Q,' (the second slide cam 34 descends due to the sliding contact between 40, thereby the piercing punch: J) 5 engages with the button die 26, and a secondary force is applied to the 7 lunge t%F. A pierced hole P of n-type is formed.

Note that even if the upper holder 21 rises as described above, the 11th
In the state shown in the figure, the pad 23 and the sectional die 30 are brought into pressure contact with the panel workpiece W by the force of the coil springs 25 and 32.

Here, the rising distance of the upper holder 21 from the bottom dead center is h%.
Also, the second slide cam 34 of the moving base is pierced by a piercing punch;

:(The angle IW of 3a is α, also the oblique force surface around 1, I:3
If the angles of C and 33C (see FIG. 3) are β, the relationship between them is as follows, and if at least tanαtanβ is set to 1 or less, El)h. For example, if α and β are both set to 40°, s = 0.42h%, and both α and β are 42°.
．． If it is set to 5°, S=0.19h, and even if the upper holder 21 rises, the second slide cam 34 or the piercing punch 35 will fall 1. Then the piercing holes will be made.

When the upper holder 21 further rises, as shown in FIG. is the vertical surface 2 of the drive cam 27
At the same time as the pad 2:3 and the sectional die 30 rise while slidingly contacting the panel work W
The state is returned to the state shown in FIG.

According to the above embodiment, sectional die 3 ()
Since the piercing hole is punched using the piercing punch 35 when the upper holder 21 is raised after the 7-lunge bending process is completed, we hope that the combined process of the 7-lunge bending process and the pierce hole process will be carried out in an ideal manner. This will prevent deformation of the pierced hole and improve the accuracy of its position and shape.

FIG. 13 shows another embodiment of the present invention. In this embodiment, in place of the previous piercing punch 35, the second flange punch 45 is used for the secondary processing flange F1.
The slide cam 14 is a sorption type, and the other construction is exactly the same as the previous embodiment. In this case as well, the same effects as in the previous embodiment can be obtained.

FIG. 14 shows still another embodiment 1 of the present invention, in which the present invention is applied to a cushion draw type drawing press mold. To be more specific, the die cushion (not shown) allows the cushion bin, 3
A blank holder 40 elastically supported through the punch 22 is disposed on the punch 22, and a sectional die 41 having a cutting edge 41a for trimming, which is a primary cut, is attached to the second slide cam. This is what I did. Therefore, in this embodiment, in the process of lowering the upper holder 21, first the upper holder 21 and the blank holder 40 are
Directly press and hold the periphery of the panel work W with
Furthermore, in the groove where the upper holder 21 reaches the bottom dead center, the upper holder 21 and the sectional die 41 descend together, so as shown in FIG. In addition to the upper holder 21, the punch 22 and the sectional die 41 work together to complete drawing forming, which is the primary process.
15, the inclined cam surfaces 27a and 3 of the drive cam 27 and the first slide cam 33 move upward again.
3a come into sliding contact with each other, the sectional die 41 integrated with the second slide cam'34 is lowered, and the plowing action based on the cooperation between the sectional die 41 and the blank holder 40 causes the secondary cutting of the 7 flange portion F. Trimming processing is performed.

In other words, in this embodiment, in the above relational expression % expression %, theoretically, if both α and βP are set to 45° or more, the sectional die 4 will rise due to the rise of the upper holder 21.
There is no F god of 1, and the sectional die 41 will stop if α, β = 45°, but the blank holder 40 will also rise as the upper holder 21 rises, so the sectional die 41 will stop. The trimming process is performed by shearing the blank holder 40. Further, even if α and β are both set at 45° or more, the rising speed of the sectional die 41 is slower than the rising speed of the upper holder 21, so it is possible to perform the trimming process with the time difference.

In addition, as shown in Fig. 16, the upper sectional die 4
1, the piercing punch 51 is inserted into the second slide cam' (
4, it is possible to carry out drawing, which is a secondary process, and piercing, which is a secondary process, at the same time.

As is clear from the above description, according to the present invention, after the bending process, which is the secondary process, is completed, secondary processes such as shearing and bending are performed in conjunction with the upward movement of the upper holder. Therefore, unlike in the past, secondary processing is not done in advance 1-, thereby preventing deformation of secondary processing parts such as pierced holes [7] and improving the accuracy of their position and shape. It has the effect of being able to.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the configuration of a conventional composite press die, @2
The figure is a perspective view showing an example of a panel work applied to the composite press mold of Fig. 1, Fig. 3 is a cross-sectional view showing an embodiment of the composite press mold according to the present invention I, and Fig. 4 is a 'rg3 '1
The IV-IV line 1 top view, Figure 51, and Figure 6 are partial perspective views 1'AI showing the configuration of the main parts of Figure 3, respectively.
%Figure 7, Figure 8, Figure 9 +>+, Figure 10, Figure 11
Figures and Figures 12 and 12 are circles to explain the operating state of Figure 3. 4↓J31'2J is a sectional view showing another embodiment of the present invention, and Figure 14 is a Similarly, FIG. 15 is a cross-sectional view showing a further embodiment of the music according to the present invention.
FIG. 16 is a sectional view showing another embodiment of the present invention. 20... lower holder, 21...-hi holder, 22...
... Punch, 27... Drive cam, 27a, 27b
...Inclination cam, 30...Sectional die (-
Next 7 JO tool), 33... 1st slide cam 1.
(3a, 33b 0.(oblique cam around 3cm1, 3
4. Second slide cam, 34C... Inclined cam surface,
35...Earring punch (secondary processing tool), 41...
・Sectional die for trimming (secondary processing tool),
45...7 lunge punch (secondary processing tool), 5J.
・Earring punch (secondary processing tool), W...Panel work. Figure 1 13 F la Figure 2 Figure 3

Claims (1)

[Claims] (1) Press and clamp the specified panel work directly or indirectly with the punch on the knife holder side and the upper holder,
After the sectional die provided on the upper holder side and the punch work together to perform the bending 7JI process, which is the primary processing, a secondary processing tool such as shearing or bending, which is also provided on the upper holder rule 1, is used to perform the prescribed processing. This is a composite press die designed to perform secondary processing, and includes a drive cam provided on the punch to horizontally slide the punch, and a drive cam that is held in the upper holder, and the upper holder from at least the bottom dead center. a first slide cam that slides horizontally in sliding contact with the drive cam when the drive cam is raised;
a second slide cam that is held by the upper holder in contact with the slide cam and that slides vertically as the first slide cam slides;
A composite press mold comprising a secondary processing tool attached to the second slide cam, and a sectional die for primary carroe attached to the upper holder.