JP2006007259A - Press device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press device capable of correctly positioning a punch forming face and a pad forming face to each other even when there are errors in a shape of a component of the press device. <P>SOLUTION: Stop pins 52a, 52b, etc. are regulated not to enter recesses 26a, 26b, etc. of a pad 20, and the pad 20 is regulated not to fall from an upper die 10. In this structure, the pad 20 is relatively movable. A punch 30 is fixed in a relatively non-movable manner with respect to a lower die 40 by die location pins 60a, 60b. Projecting positioning members 34a, 34b, etc. are fixed to a corner of the punch 30. Recessed positioning members 24a, 24b, etc. are fixed to a corner of the pad 20. The recessed positioning members 24a, 24b, etc. are arranged at the positions corresponding to the projecting positioning members 34a, 34b, etc., and by fitting the recessed positioning members to the projecting positioning members, a forming face 32 of the punch 30 and a forming face 22 of the pad 20 are directly positioned. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a press apparatus. Specifically, the present invention relates to a press device that realizes accurate alignment between a punch molding surface and a pad molding surface.

As shown in FIG. 4, the press apparatus includes a lower mold 100 and an upper mold 70. The lower mold 100 supports the punch 90, and the upper mold 70 supports the pad 80. The punch 90 has a molding surface 92, and the pad 80 has a molding surface 82. When the press material is set on the forming surface 92 of the punch 90 and the upper die 70 is pushed down, the press material is pressed between the forming surface 92 of the punch 90 and the forming surface 82 of the pad 80 and bent.
In order to accurately process the press material, it is necessary to align the molding surface 92 of the punch 90 and the molding surface 82 of the pad 80. Therefore, in the conventional technique, the punch 90 is fixed to the lower mold 100 by the die location pins 110a and 110b, the pad 80 is fixed to the upper mold 70 by the slide plates 120a and 120b, and the guide post 72 fixed to the upper mold 70. A configuration is adopted in which the positional relationship between the upper mold 70 and the lower mold 100 is maintained constant by the guide holes 102 provided in the lower mold 100. That is, the positional relationship between the upper mold 70 and the lower mold 100 is constrained by the guide post 72 and the guide hole 102, the punch 90 is fixed to the lower mold 100, and the pad 80 is fixed to the upper mold 70, A technique for aligning the punch 90 and the pad 80 is employed.

Since the accuracy of the component parts is not perfect, when the punch 90 is fixed to the lower mold 100 and the pad 80 is fixed to the upper mold 70, the relative positions of the punch 90 and the pad 80 are targeted. It may deviate from the positional relationship. Therefore, actually, the slide plate 120 having a thickness in which the punch molding surface 92 and the pad molding surface 82 have a target positional relationship when the pad 80 is fixed to the upper mold 70 from among the slide plate groups having different thicknesses. , 120b, the punch molding surface 92 and the pad molding surface 82 are aligned.
The operation of selecting the slide plates 120a and 120b having the optimum thickness is not easy and takes a lot of time and man-hours.

Patent Documents 1 and 2 describe a technique in which a guide post is fixed to an upper die and a guide hole is provided in a pad. In this technology, if the upper mold and the pad are positioned by the guide post and the guide hole in order to process the guide hole based on the molding surface of the pad, the upper mold and the pad molding surface are not affected even if there is an error in the pad outer shape. Positioned in a fixed positional relationship.
Patent Documents 1 and 2 describe a technique in which a guide hole is provided in an upper mold and a guide post is fixed to a pad. In this technology, in order to process the guide post with reference to the molding surface of the pad, if the upper mold and the pad are positioned by the guide post and the guide hole, the upper mold and the pad molding surface are detected even if there is an error in the external shape of the pad. Are positioned in a fixed positional relationship.
According to the techniques described in Patent Document 1 and Patent Document 2, it seems that it is not necessary to select a slide plate having a thickness that realizes a target positional relationship. Certainly, if the punch is fixed to the lower mold so that the punch molding surface is the target position with respect to the lower mold, and the relative positional relationship between the lower mold and the upper mold is accurately positioned, the slide plate is selected. There is no need to do.

JP 2002-219528 A JP 2002-219529 A

However, when the above assumptions are broken, the positional relationship between the punch molding surface and the pad molding surface is also deviated from the target positional relationship even by the techniques of Patent Literature 1 and Patent Literature 2.
FIG. 5 shows the linkage relationship between the positioning of the punch molding surface and the pad molding surface. In conventional technology,
(1) The punch forming surface and the punch outline are in a certain positional relationship.
(2) If the punch is fixed to the lower mold based on the outer shape of the punch, the punch forming surface and the lower mold have a certain positional relationship.
(3) If the positional relationship between the lower mold and the upper mold is constrained, the punch forming surface and the upper mold have a certain positional relationship.
(4) The pad molding surface and the pad outer shape are in a certain positional relationship.
(5) Therefore, if the pad is fixed to the upper die based on the outer shape of the pad, the pad molding surface and the upper die should have a certain positional relationship, and (3) the punch molding surface and the upper die have a certain positional relationship. As a result, the punch forming surface and the pad forming surface are positioned at the target position.
Is used.

Actually, errors are accumulated because the accuracy of the component parts is not perfect, and the punch is fixed to the lower mold based on the punch outline, and the pad is fixed only to the upper mold based on the pad outline. The molding surface and the pad molding surface are not aligned.
The prior art shown in FIG. 4 can be said to be a technique for searching the positional relationship between the pad and the upper mold where the punch molding surface and the pad molding surface are in a target positional relationship, and time and man-hours are required for searching the positional relationship. And
The techniques of Patent Literature 1 and Patent Literature 2 process guide posts and guide holes based on the pad molding surface, so that the positional relationship between the upper mold and the pad molding surface is kept constant even if there is an error in the pad outer shape. If there is an error in the positional relationship between the punch molding surface and the lower mold, or there is an error in the positional relationship between the lower mold and the upper mold, the punch molding surface and the pad molding surface are in the target positional relationship. Don't be. The techniques of Patent Literature 1 and Patent Literature 2 require the prerequisite that the positional relationship between the punch forming surface and the lower die is accurately positioned and the positional relationship between the lower die and the upper die is accurately positioned. Actually, it is inevitable that an error enters the positional relationship between the punch forming surface and the lower die and an error enters the positional relationship between the lower die and the upper die. In the techniques of Patent Literature 1 and Patent Literature 2, it is not guaranteed that the punch molding surface and the pad molding surface are aligned.

  In the present invention, a technology is realized in which the punch molding surface and the pad molding surface are accurately aligned. Even if there is an error in the shape of the component parts of the press machine, a technology is realized that allows the punch molding surface and the pad molding surface to be accurately aligned.

The press device embodied by the present invention has a lower die and a punch supported by the lower die and having a molding surface. Moreover, it has an upper mold | type and the pad which has the molding surface while being supported by the upper mold | type. In this press apparatus, one of the lower mold and the punch or the upper mold and the pad is fixed by the fixing portion so as not to be relatively movable. The other of the lower mold and the punch or the upper mold and the pad (the one not fixed by the fixing portion) is supported by the floating support portion so as to be relatively movable.
At least a pair of positioning portions are fixed to each of the punch and the pad, and when the punch and the pad approach each other, the punch and the pad are directly positioned by the positioning portion.

(The action and effect)
This press machine has the conventional common sense, that is, the punch forming surface and the pad forming surface are fixed by fixing the punch to the lower die, fixing the pad to the upper die, and maintaining the positional relationship between the upper die and the lower die constant. Do not use common sense to align.
Conversely, at least one of the lower die and the punch or the upper die and the pad is positively movable relative to the floating support portion. On the other hand, each of the punch and the pad is provided with a positioning portion for directly positioning the punch and the pad.
According to this press apparatus, the punch and the pad supported so as to be capable of relative movement are directly aligned by the positioning portion at the time of pressing. The work for alignment is greatly simplified.

(Preferred means for solving the problem)
It is preferable that the positioning portions are positioned in the six-axis directions by fitting with each other. Here, the 6-axis direction refers to parallel movement and rotational movement with respect to three orthogonal axes.
(The action and effect)
If the punch molding surface and the pad molding surface are positioned in the six-axis direction, both molding surfaces are positioned in a three-dimensional positional relationship. If positioning portions are provided at three positions of the punch and the pad, the positioning can be easily performed in the six axis directions.

The best mode for carrying out the invention is listed below.
(Embodiment 1) Positioning portions are provided at three locations of the punch and the pad, respectively. The three positioning portions are in a non-linear position, and are positioned to form a triangle.
(Form 2) A positioning part is comprised with the pair of the member which has a cone-shaped convex part, and the member which has a conical recessed part, and it positions by a convex part and a recessed part fitting.
(Mode 3) The pad is supported so as to be movable within a predetermined range with respect to the upper die by being suspended from the upper die.
(Mode 4) The pad is biased downward from the upper mold by a spring.

A press apparatus embodying the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of the press device 2. In FIG. 1, parts related to the present invention are mainly shown, and parts included in a normal press apparatus are appropriately omitted.
The press device 2 includes an upper die 10, a pad 20, a punch 30, and a lower die 40.
Concave portions are respectively provided in the contact surfaces of the lower die 40 and the punch 30, and die location pins 60 a and 60 b are fitted therein. Thereby, the punch 30 is fixed so as not to move relative to the lower mold 40. The upper surface of the punch 30 is a molding surface 32, and a press material is set here. Convex positioning members 34 a, 34 b and 34 c are fixed to the corners of the punch 30. The convex positioning members 34a, 34b, and 34c are fixed at positions that are the apexes of the triangle when viewed from the upper mold 10 side. The convex positioning member 34c is not shown. The positions of the convex positioning members 34a, 34b, and 34c are determined based on the molding surface 32. The convex positioning members 34a, 34b, and 34c have the same shape, and a three-dimensional shape is shown in FIG. The upper surface is formed in a convex portion curved in a conical shape.

The pad 20 is suspended from the upper mold 10 and supported by the stop pins 52a, 52b, 52c so as not to fall. The stop pins 52a, 52b, and 52c enter the recesses 26a, 26b, and 26c of the pad 20 and restrict the pad 20 from dropping from the upper mold 10. Stop pin 52a, 52b, 52c is being fixed to the position used as the vertex of a triangle, when it sees from the lower mold | type 40 side. Stop pin 52c and recess 26c are not shown. Springs 50 a, 50 b, 50 c are disposed between the inner upper surface of the upper mold 10 and the upper surface of the pad 20. The spring 50c is not shown.
The recesses 26a, 26b, and 26c are larger than the stop pins 52a, 52b, and 52c, and the pad 20 is positioned relative to the upper mold 10 with the stop pins 52a, 52b, and 52c entering the recesses 26a, 26b, and 26c. Thus, it can be moved in the horizontal direction, depth direction, and vertical direction of the paper. The pad 20 is floatingly supported so as to be movable within a predetermined range with respect to the upper mold 10 while being suspended from the upper mold 10.
The lower surface of the pad 20 is a molding surface 22. The pad molding surface 22 is paired with the punch molding surface 32, and a press material is pressed between them to bend. Recessed positioning members 24a, 24b, and 24c are fixed to the corners of the pad 20. The concave positioning members 24a, 24b, and 24c are arranged at positions corresponding to the convex positioning members 34a, 34b, and 34c. The positions of the concave positioning members 24a, 24b, and 24c are determined with reference to the molding surface 22. The concave positioning members 24a, 24b, and 24c have the same shape, and FIG. 2 shows a three-dimensional shape. The top surface is formed in a conical concave portion. The positioning determining members 34a, 34b, 34c, 24a, 24b, and 24c may be made of metal or hard rubber material.

  As shown in FIG. 1, a guide hole 42 is formed on the right side of the lower mold 40. On the right side of the upper mold 10, a guide post 12 extending downward is projected. By inserting the guide post 12 into the guide hole 42, the relative vertical movement of the lower mold 40 and the upper mold 10 is guided.

When the upper mold 10 moves toward the lower mold 40, the convex positioning member 34a is fitted into the concave positioning member 24a, the convex positioning member 34b is fitted into the concave positioning member 24b, and the convex positioning member 34c is concave. It fits in the positioning member 24c. Then, the punch 30 and the pad 20 are positioned at three positions, positioned in any direction of the three orthogonal axes, and the rotation angle around any axis of the three orthogonal axes is also positioned. That is, positioning is performed for all six axes. The punch 30 and the pad 20 are positioned with respect to the in-plane position, the height position, and all degrees of freedom of relative rotation.
The positions of the concave positioning members 24a, 24b, and 24c are determined with reference to the molding surface 22. The positions of the convex positioning members 34a, 34b, and 34c are determined based on the molding surface 32. When the convex positioning member 34a fits into the concave positioning member 24a, the convex positioning member 34b fits into the concave positioning member 24b, and the convex positioning member 34c fits into the concave positioning member 24c, The punch forming surface 32 is positioned for all six axes.

Next, the operation | movement which processes a press raw material with the press apparatus 2 is demonstrated.
A press material is set on the molding surface 32 of the punch 30. The press material before processing is a flat surface, and is placed on the vertices of a plurality of peaks of the undulating molding surface 32. When the upper mold 10 is pushed down, the guide post 12 is guided by the guide hole 42 and moves downward. The molding surface 22 of the pad 20 approaches the molding surface 32 of the punch 30, and first, apexes of a plurality of peaks of the molding surface 22 of the pad 20 abut against the press material. The press material is pressed between the molding surface 22 of the pad 20 and the molding surface 32 of the punch 30. When the upper die 10 is further pushed down, the concave positioning members 24a, 24b, 24c of the pad 20 are fitted with the convex positioning members 34a, 34b, 34c of the punch 30, respectively. At this time, the springs 50 a, 50 b and 50 c are compressed against the urging force, and the press material is bent and formed by the forming surface 22 of the pad 20 and the forming surface 32 of the punch 30.

In the press device 2, when the molding surface 22 of the pad 20 approaches the molding surface 32 of the punch 30, the concave positioning members 24a, 24b, and 24c are fitted into the convex positioning members 34a, 34b, and 34c, respectively. From the characteristics of the shape of these positioning members, positioning is performed with respect to six axes of the molding surface 32 of the punch 30 and the molding surface 22 of the pad 20. In addition, these positioning members have a simple configuration and can use a highly versatile material, so that they are easy to manufacture and do not cost.
In addition, a gap is provided between the inner side surface of the upper mold 10 and the side surface of the pad 20, and a gap is provided between the inner upper surface of the upper mold 10 and the upper surface of the pad 20. The pad 20 can move within the gap. For this reason, the pad 20 can be smoothly adapted to the position determined by the three pairs of the concave positioning member and the convex positioning member without being restricted. Thereby, the relative positional relationship between the molding surface 22 of the punch 20 and the molding surface 32 of the pad 30 can be accurately determined.

Hereinafter, in addition to the press device of the above-described embodiment, the configuration of the press device that can be embodied by the present invention will be exemplified.
The convex positioning member may be fixed to the pad side, and the concave positioning member may be fixed to the punch side. Positioning members may be fixed at two places on the punch and two places on the pad. In this case, a third auxiliary positioning member may be used.

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.

Sectional drawing of a press apparatus. The figure which shows the three-dimensional shape of a concave positioning member. The figure which shows the three-dimensional shape of a convex-type positioning member. Sectional drawing of the conventional press apparatus. The figure which shows the chain relationship of positioning of a punch shaping | molding surface and a pad shaping | molding surface.

Explanation of symbols

2: Press device
10: Upper mold,
12: Guide post,
20: Pad,
22: Pad molding surface,
24a, 24b: concave positioning member,
26a, 26b: recess,
30: Punch,
32: punch molding surface,
34a, 34b: convex positioning members,
40: Lower mold,
42: guide hole,
50a, 50b: Spring,
52a, 52b: stop pins,
60a, 60b: Die location pin

Claims (2)

A lower mold, and a punch supported by the lower mold and having a molding surface;
An upper mold and a pad supported by the upper mold and having a molding surface;
A fixing part that fixes one of the lower mold and the punch or the upper mold and the pad so as not to be relatively movable;
A floating support that supports the lower mold and the punch or the upper mold and the other pad in a relatively movable manner;
A press apparatus that is fixed to each of a punch and a pad and includes at least a pair of positioning portions that determine a positional relationship when the two approach each other.   The press device according to claim 1, wherein the positioning portions are positioned in six axial directions by being fitted to each other.

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