JP2009090299A - Cam structure of press die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compactly provide a slide cam which moves forward and backward in the horizontal direction on a upper die and to prevent the lowering of the strength of a press blade even when the slide cam is provided on the upper die side by side. <P>SOLUTION: This cam structure is provided with a guide rail 3 which is provided on the upper die 2 of a press die and the guide direction of which is arranged in a direction crossed substantially orthogonally to the direction of the press stroke of the upper die, a slide cam 4 the inclined cam face 41 of which is formed on the lower side, a press blade 5 is provided in the end part of the lower side, also an engaging part 42 composed of a notch shape which can be hung down from the guide rail is provided in the inside on the upper side and which is moved along the guide rail, a cam driver 7 which slides on the cam face of the slide cam which is provided on the lower die 6 of the press die and with which the slide cam is moved forward in accordance with the press stroke when the upper die descends and a compression coil spring 8 for imparting elastic force by which the slide cam is moved back ward in accordance with the press stroke when the upper die provided on the slide cam is ascended. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cam structure of a press mold, and more particularly to a cam structure of a press mold in which a slide cam that moves forward and backward in a horizontal direction is provided on an upper mold.

  Conventionally, press molds with cams built in to perform drilling, bending, punching, etc. in a direction different from the press stroke direction are known. For example, a slide cam that moves back and forth in the horizontal direction. There is a press die provided on the upper die. As shown in FIGS. 3 (A) and 3 (B), the press die provided with the slide cam that moves forward and backward in the horizontal direction is a movable slide cam provided on the upper die 100 and having a cam surface 101a. 101, a cam driver 201 that is provided on the lower mold 200 and moves the slide cam 101 by pressing the cam surface 101a of the slide cam 101, and a return mechanism (not shown) that returns the slide cam 101 to its original position. (For example, refer to Patent Document 1).

  The cam surface 101a of the slide cam 101 is formed as an inclined surface, and the pressing surface 201a of the cam driver 201 that presses the cam surface 101a is formed as an inclined surface that can come into surface contact with the cam surface 101a. Further, since the slide cam 101 is an upper suspension cam, in order to install the slide cam 101 on the upper mold 100, sliding guide portions 102, 102 such as rotating rollers are provided on both sides above the slide cam 101, and the sliding guide portion is provided. 102 and 102 can be moved on the upper plates 104 and 104 by being placed on the upper plates 104 and 104 fixed to the projecting portions 103 and 103 formed on the upper mold 100. Therefore, the slide cam 101 suspended from the two upper plates 104, 104 of the upper mold 100 by the sliding guide portions 102, 102 provided on both sides is moved along the longitudinal direction of the upper plates 104, 104. Can do.

  In the press die having such a cam structure, when the upper die 100 is located at the top dead center, the slide cam 101 is moved backward to a predetermined retraction point by the return mechanism. When the upper mold 100 located at the top dead center is lowered, the cam surface 101a of the slide cam 101 of the upper mold 100 comes into surface contact with the pressing surface 201a of the cam driver 201 of the lower mold 200. Further, the upper mold 100 Is lowered, the pressing surface 201a of the cam driver 201 presses the cam surface 101a of the slide cam 101, so that the slide cam 101 can be moved forward to the pressing position.

JP-A 61-17229

  However, in the press die cam structure described in the background art, as shown in FIG. 3 (B), two slide cams 101, 101 are arranged on the upper die, and the two slide cams 101, 101 are respectively arranged at the lower ends. In order to press the plate with the press blades 300 facing each other, the upper plate 104 for placing the sliding guide portion 102 and the protruding portion 103 of the upper mold 100 are disposed on the side surface of the slide cam 101. The press blade 300 had to be protruded from the upper plate 104 fixed to the protrusion 103 formed in the mold 100. That is, since the press blade 300 must be projected from the side surface of the slide cam 101 by the width direction of the upper plate 104 and the protruding portion 103 of the upper mold 100, there is a possibility that the strength may be reduced and the press formability may be adversely affected. there were. Further, since the upper plates 104 must be arranged on both sides in the moving direction of the slide cam 101, both the upper plates 104 have to be removed when the slide cam 101 is removed or replaced.

  The present invention has been made to solve such conventional problems, and a slide cam that moves forward and backward in the horizontal direction can be provided compactly in the upper die, and even if the slide cams are arranged side by side in the upper die, the press is performed. An object of the present invention is to provide a cam structure of a press die that does not cause a reduction in the strength of the blade.

  The cam structure of the press die of the present invention that achieves the above object is a guide rail that is provided on the upper die of the press die and in which the guide direction is arranged in a direction substantially perpendicular to the press stroke direction of the upper die. An inclined cam surface is formed on the lower side, a press blade is provided at the lower end portion, and an engaging portion having a notch shape that can be suspended from the guide rail is provided on the upper side. , A slide cam that moves along the guide rail, and a cam driver that slides on the cam surface of the slide cam provided on the lower die of the press die and moves the slide cam forward according to the press stroke when the upper die is lowered And an elastic body that is provided on the slide cam and imparts an elastic force that moves the slide cam backward in accordance with the press stroke when the upper die is raised. In this specification, “sliding” means sliding in a contact state. Further, in the present specification, “internal installation” means provision inside.

  According to the press mold cam structure of the first aspect as described above, since the guide rail for moving the slide cam is housed in the slide cam, the slide cam is provided so that it can be suspended in a compact manner on the upper mold. Can do.

  According to a second aspect of the present invention, in the cam structure of the press mold according to the first aspect, the guide rail is formed in an inverted T shape, and the engaging portion of the slide cam is formed with respect to the inverted T shape guide rail. It is formed in a reverse T-shaped groove that can be suspended.

  According to the press mold cam structure according to the second aspect as described above, the slide cam can be smoothly moved along the guide rail while being suspended from the guide rail.

  According to a third aspect of the present invention, in the cam structure of the press mold according to the second aspect, the guide rail is fixed to a lower surface of the rail base portion, the rail base portion being fitted in a predetermined position of the upper die, and the guide rail. Are formed in a reverse T-shape and a rail sliding portion fixed to the upper surface of the rail base portion and fixing the rail base portion to the upper mold.

  According to the press mold cam structure according to the third aspect, the slide cam can be removed and replaced only by removing one rail sliding portion from the rail fixing portion.

  According to a fourth aspect of the present invention, in the press mold cam structure according to the third aspect, between the rail base portion of the guide rail and the fitting portion at a predetermined position of the upper die into which the rail base portion is fitted. Is an intervening shim plate.

  According to the press die cam structure of the fourth aspect, the position of the slide cam relative to the guide rail can be adjusted in the horizontal direction by interposing the shim plate at this position.

  According to a fifth aspect of the present invention, in the press mold cam structure according to the third aspect, a shim is provided between the lower surface of the rail base portion of the guide rail and the surface of the rail sliding portion that contacts the rail base portion. A board is interposed.

  According to the press mold cam structure of the fifth aspect, the position of the slide cam relative to the guide rail can be adjusted in the vertical direction by interposing the shim plate at this position.

  A sixth aspect of the present invention is a press mold cam structure according to any one of the first to third aspects, wherein the upper surface of the slide cam and the upper die on which the upper surface of the slide cam slides are provided. A shim plate is interposed between the sliding cam sliding surface.

  According to the press mold cam structure of the sixth aspect as described above, the gap between the pair of press blades for performing the press working can be adjusted by interposing the shim plate at this position.

  According to the cam structure of the press die of the present invention, the slide cam that moves forward and backward in the horizontal direction can be provided in the upper die in a compact manner, so that the strength of the press blade is reduced even if the slide cam is provided side by side in the upper die. Can be prevented.

  The best mode for carrying out the press die cam structure of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1A and 1B, the cam structure of the press die of the present invention is provided in the upper die 2 of the press die and is substantially perpendicular to the press stroke direction of the upper die 2. The guide rail 3 is arranged in the guide direction, the inclined cam surface 41 is formed on the lower side, and a press blade 5 such as a bending blade is provided at the lower end, and the guide rail 3 is provided on the upper side. An engaging portion 42 having a notch shape that can be suspended on the slide rail 4 is provided inside the slide cam 4 that moves along the guide rail 3 and a cam surface 41 of the slide cam 4 provided on the lower die 6 of the press die. A cam driver 7 that slides and moves the slide cam 4 forward according to the press stroke when the upper die 2 is lowered, and the slide cam 4 provided on the slide cam 4 according to the press stroke when the upper die 2 is raised. Moved backwards And a compression coil spring 8 as an elastic member for imparting that elastic force.

  The guide rail 3 is formed in, for example, an inverted T shape, and the engaging portion 42 of the slide cam 4 is formed in an inverted T shape groove that can be suspended from the inverted T shape guide rail. . By forming the guide rail 3 and the engaging portion 42 of the slide cam 4 in this manner, the slide cam 4 can be smoothly moved along the guide rail 3 while being suspended from the guide rail 3. . The guide rail 3 having such a shape includes a rail base portion 31 fitted into a predetermined position of the upper mold 2 and a rail sliding portion which is fixed to the lower surface of the rail base portion 31 and forms the guide rail 3 in an inverted T shape. 32 and a rail fixing portion 33 which is fixed to the upper surface of the rail base portion 31 and fixes the rail base portion 31 to the upper mold 2. By configuring the guide rail 3 in this manner, the slide cam 4 can be removed and replaced simply by removing one rail sliding portion 32 from the rail fixing portion 33. The rail fixing portion 33 is fixed to the upper die 2 so as to cover the rail fitting hole 21 which is a fitting portion formed at a predetermined position of the upper die 2 and is fitted into the rail fitting hole 21. The rail base portion 31 can be fixed. Moreover, the rail base part 31 and the rail sliding part 32, and the rail sliding part 32 and the rail fixing | fixed part 33 are each fixed by screwing members, such as a screw and a volt | bolt.

  A compression coil spring 8 is inserted into the slide cam 4, and a bottomed hole 43 is formed so that an elastic force can be applied to the compression coil spring 8 in the moving direction of the slide cam 4. A spring contact plate 22 for contacting 8 is fixed.

  In the cam driver 7, a pressing surface 71 that presses the cam surface 41 of the slide cam 4 is formed with an inclined surface having substantially the same inclination angle as the cam surface 41. A sliding material 91 capable of surface contact is fixed.

  A cam stopper plate 10 that restricts the backward movement of the slide cam 4 is fixed at a position where the slide cam 4 of the upper mold 2 is disposed.

  Further, a shim plate 92 is interposed between the rail base portion 31 of the guide rail 3 and the rail fitting hole 21 at a predetermined position of the upper mold 2 into which the rail base portion 31 is fitted. The shim plates 92 are interposed on both side surfaces of the rail base portion 31, respectively. By interposing the shim plate 92 at this position, the position of the slide cam 4 relative to the guide rail 3 can be adjusted in the horizontal direction. A shim plate 93 is interposed between the lower surface of the rail base portion 31 of the guide rail 3 and the surface of the rail sliding portion 32 that contacts the rail base portion 31. By interposing the shim plate 93 at this position, the position of the slide cam 4 with respect to the guide rail 3 can be adjusted in the vertical direction. A shim plate 94 is interposed between the upper surface of the slide cam 4 and the slide cam sliding surface of the upper mold 2 on which the upper surface of the slide cam 4 slides. The shim plates 94 are interposed on both sides of the rail base portion 31, and are fixed to the upper surface of the slide cam 4 by screwing members such as screws and bolts. By interposing the shim plate 94 at this position, it is possible to adjust the gap between the pair of press blades that perform the press working.

  The operation of the press die having such a cam structure 1 will be described.

  When the upper mold 2 is located at the top dead center, the slide cam 4 is moved backward to a predetermined retracted point by the elastic force of the compression coil spring 8. When the upper die 2 located at the top dead center is lowered to press the plate material, the cam surface 41 of the slide cam 4 of the upper die 2 is fixed to the pressing surface 71 of the cam driver 7 of the lower die 6. The sliding material 91 is brought into surface contact. Further, when the upper die 2 is lowered, the sliding material 91 fixed to the pressing surface 71 of the cam driver 7 slides while pressing the cam surface 41 of the sliding cam 4, so that the sliding cam 4 has the compression coil spring 8. It moves forward along the guide rail 3 fitted to the engaging portion 42 against the elastic force. When the upper die 2 reaches the bottom dead center, the press blade 5 provided at the lower end of the slide cam 4 advances to the press processing position where the corresponding press blade (not shown) is arranged. Since it moves, the plate material can be pressed by the pair of press blades.

  After the plate material is pressed, when the upper die 2 is moved from the bottom dead center toward the top dead center, the cam surface 41 of the slide cam 4 slides on the sliding material 91 fixed to the pressing surface 71 of the cam driver 7. At this time, however, the slide cam 4 moves backward along the guide rail 3 fitted to the engaging portion 42 by the elastic force of the compression coil spring 8. Then, the slide cam 4 moves backward to a predetermined retraction point, and the upper mold 2 reaches the top dead center.

  Since the guide rail 3 for moving the slide cam 4 is housed in the slide cam 4, the slide cam 4 can be provided so that the slide cam 4 can be suspended from the upper mold 2 in a compact manner. Therefore, as shown in FIG. 2, even if two slide cams 4, 4 are arranged on the upper mold 2 and the press blades 5 are arranged opposite to the lower ends of the two slide cams 4, 4, 4, 4 can be brought close to each other without any restriction on arrangement. Further, the press blade 5 does not have to be protruded from the side surface of the slide cam 4 with such a length that causes a reduction in strength, so that the press workability is not adversely affected.

  Further, in the press die having such a cam structure 1, the slide cam 4 is configured such that the rail fixing portion 33 of the guide rail 3 is removed upward and the rail base portion 31 is fitted to the rail at a predetermined position of the upper die 2. The slide cam 4 can be easily removed and replaced because it can be removed from the upper mold 2 simply by pulling it downward from the hole 21.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

It is a figure which shows the example of preferable embodiment in the cam structure of the press die of this invention, (A) is sectional drawing seen from the side surface, (B) is A arrow view in (A). It is explanatory drawing which shows the example of application of the cam structure of the press die of this invention. It is a figure which shows the cam structure of the conventional press die, (A) is a side view, (B) is a B arrow view in (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cam structure of a press die 2 ... Upper die 3 ... Guide rail 31 ... Rail base part 32 ... Rail sliding part 33 ... Rail fixed part 4 ... Slide cam 41 ... Cam surface 42 ... ... Engagement part 5 ... Press blade 6 ... Lower mold 7 ... Cam driver 8 ... Compression coil spring (elastic body)
92, 93, 94 ... Shim board

Claims (6)

A guide rail provided in an upper die of a press die and having a guide direction arranged in a direction substantially perpendicular to the press stroke direction of the upper die;
An inclined cam surface is formed on the lower side, and a press blade is provided on the lower end portion, and an engaging portion having a notch shape that can be suspended from the guide rail is provided on the upper side. A slide cam that moves along the guide rail;
A cam driver provided on the lower die of the press die and sliding on the cam surface of the slide cam to move the slide cam forward in accordance with the press stroke when the upper die is lowered;
A press mold cam structure, comprising: an elastic body provided on the slide cam and providing an elastic force for moving the slide cam backward in accordance with the press stroke when the upper mold is raised.   The guide rail is formed in an inverted T-shape, and the engaging portion of the slide cam is formed in an inverted T-shaped groove that can be suspended from the inverted-T-shaped guide rail. 2. The cam structure of a press die according to claim 1.   The guide rail includes a rail base portion that is fitted into a predetermined position of the upper mold, a rail sliding portion that is fixed to a lower surface of the rail base portion and forms the guide rail in the inverted T shape, and the rail base portion 3. The press die cam structure according to claim 2, further comprising a rail fixing portion fixed to the upper surface of the rail and fixing the rail base portion to the upper die.   A shim plate is interposed between the rail base portion of the guide rail and the fitting portion at the predetermined position of the upper mold into which the rail base portion is fitted. The cam structure of the press die according to claim 3.   A shim plate is interposed between the lower surface of the rail base portion of the guide rail and a surface of the rail sliding portion that contacts the rail base portion. Item 4. A press die cam structure according to Item 3.   The shim plate is interposed between the upper surface of the slide cam and the slide cam sliding surface of the upper mold on which the upper surface of the slide cam slides. The cam structure of a press die according to any one of claims 1 to 3.

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