JP2003080326A - Cam unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cam unit e.g. in a press die a part of which can easily be overhauled or the component of which is easily replaced. SOLUTION: A suspension cam unit 1 comprises a cam base 2 fixed to a movable die, a cam driver 12 fixed to a fixed die, and a cam slider 13 which is supported by the cam base, reciprocated in the predetermined direction by the cam action with the cam driver, and works a work by a fixed tool. A part of the cam base 12 is split in an attachable/detachable manner so that the cam slider is moved to the side opposite to the work, and drawn out of the cam base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cam unit in a press die, for example, and relates to a cam unit used for making a hole in a vehicle body frame.

[0002]

2. Description of the Related Art Conventionally, as a cam unit which is attached to a movable mold and a fixed mold and comprises a cam base, a cam driver and a cam slider, as shown in FIG. As a unit, a cam base 11 fixed to the movable mold side, a cam driver 12 fixed to the fixed mold side, and the cam base 11
Cam slider 13 which receives a pressing action to move along the guide surface 12a of the cam driver 12 to perform a working action, and a return spring which returns the cam slider 13 to its original position when the cam base moves to the top dead center. 14
A slide keeper 15a for holding the cam slider 13 on the cam base 11, and a forced return follower 16 forcibly returning the cam slider 13 when the cam base 11 moves from bottom dead center to top dead center. It has been known.

Further, as shown in FIG. 6, there is a relatively large suspension cam unit, and the cam base 11 is similar to the above.
a, a base plate 11b fixed to the cam base 11a, a cam driver 12b, and a cam slider 1
3a, return spring 14, and fall prevention plate 1 that prevents the cam slider 13a from dropping from the cam base 11a.
5b and a forced return follower 16 for the cam slider 13a.

Further, as the horizontal cam unit, as shown in FIG. 7, a cam base 11b fixed to the fixed mold side.
And a cam driver 12c fixed to the movable mold side,
It is known that the cam slider 13b, the lower slider 13d, and the forced return follower 16 are included.

[0005]

However, in the above hanging cam unit or horizontal cam unit,
For example, as shown in FIG. 8, when the retainer 17 and the punch 18 are attached to the tool attachment surface 13c of the cam slider 13 as a tool for making a hole in the body frame, it is necessary to remove the cam slider 13 from the mold, or When it is desired to adjust the position of the return spring 14 when the punch 18 is being drilled, the cam slider can be removed while the retainer 17 and the punch 18 are still attached. It is difficult to remove the return spring 14 or attach the return spring 14 between the cam slider and the cam base later.

That is, as shown in FIG. 9, the retainer 1
7 and the punch 18, in the case of the hanging cam unit shown in FIG. 8, it is necessary to push the cam slider 13 in the acting direction of the punch 18 in order to remove the cam driver 12 from the fixed mold and remove the cam slider 13. But there is
Then, the tip of the punch 18 may collide with a part of the die. After all, not only the retainer 17 and the punch 18 have to be removed, but also the work of removing them has to be carried out inside the mold in a narrow working space, which makes the work difficult and troublesome. is there.

Further, in adjusting the punching position of the punch 18, it is necessary to remove only the return spring 14 from the mold. In the conventional cam unit structure, for example, in the case of the large suspension cam unit shown in FIG. As shown in FIG. 10, since the base plate 11c fixed to the bolt 11a by the bolt is an integral body, the rear portion 11d interferes with the movement of the return spring 14 to the side opposite to the workpiece. Therefore, the cam slider 13a
It is possible to remove the return spring 14 by removing, but since the cam slider 13a cannot be removed as described above,
After all, the return spring 14 cannot be removed either. On the other hand, also in the case of the horizontal cam unit shown in FIG. 7, the return spring 14 is fitted and enclosed in the recess space of the lower slider 13d as shown in FIG. Even if 19 is removed from the rear end of the cam base 11b, the cam slider 13b integrated with the lower slider 13d (see FIG. 7) cannot be removed by moving it to the side opposite to the object to be machined unless it comes out backward. Of.

As described above, the cam unit according to the conventional example has problems to be solved in the removing work and the tool positioning work. The cam unit according to the present invention has been proposed to solve such problems.

[0009]

The gist of the cam unit according to the present invention for solving the above problems is to provide a cam base fixed to a movable mold, a cam driver fixed to the fixed mold, and the cam base. A hanging cam unit configured to include a cam slider that is supported and reciprocates in a predetermined direction by a cam action with the cam driver and that processes a workpiece with a fixed working tool, wherein the cam slider is That is, a part of the cam base is divided so as to be detachable so that the cam base can be pulled out from the cam base by moving it to the opposite side.

A cam unit comprising a cam driver, a cam base, and a cam slider which reciprocates in a predetermined direction by the cam base and the cam driver and which processes an object to be machined by a machined tool which is fixed to the cam slider. An elastic member, which is an urging means for returning the cam slider in the cam base, is moved to the side opposite to the object to be processed and can be pulled out from the cam base in a state where the cam unit is attached to the mold. It is that a part of it has been disassembled to be removable.

According to the cam unit of the present invention, a part of the cam base supporting the cam slider can be disassembled, so that the processing tool remains fixed after the cam unit is attached to the mold. The cam slider of can be taken out and removed on the side opposite to the work piece. Also, in the work of aligning the processing tool fixed to the cam slider to the processing object, the return spring that urges the processing object side to the opposite side can be removed, and the tip of the processing tool contacts the processing object. The adjustment work for the alignment is facilitated without hindering the alignment work.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a cam unit according to the present invention will be described with reference to the drawings. To facilitate understanding of the invention, portions corresponding to those of the conventional example will be described with the same reference numerals as those of the conventional example.

A cam unit 1 according to the first embodiment of the present invention
As shown in FIG. 1, is a small-sized hanging cam unit for mounting the cam base 2 on the upper moving die, and the cam base 2 and the cam driver 1 fixed to the fixed die.
2 and a cam slider 13 which is supported by the cam base 2 and is reciprocated in a predetermined direction by a cam action of the cam driver 12 and which is used to process an object to be machined by a fixed work tool.

The cam base 2 has a wall 2d vertically provided at a rear position thereof. And on the wall 2d,
The divided small wall 2a is fixed by being screwed into the screw hole 2c by a bolt 2b, and the wall 2d and the divided small wall 2a are:
Compose one vertical wall. The wall 2d and the divided small wall 2a are integrated to correspond to the vertical wall 11e of the conventional example shown in FIG.

A vertical wall of the wall 2d and the divided small wall 2a,
The return spring 14 and the cam slider 13 are mounted between the cam base 2 and the front receiving wall 2e.

The rear vertical wall of the cam base 12 is
Since the wall 2d and the detachable split small wall 2a, which is a split body, are separated, the hanging cam unit 1 is detached from the cam base 2 after the cam slider 13 is mounted on the movable mold and the fixed mold. At the same time, by removing the divided small wall 2a, the cam slider 13 is pulled out in a direction (solid arrow b in the figure) opposite to the direction in which the workpiece is machined (arrow a in a dashed line in the figure). You can take it out.

The method of taking out the cam slider 13 will be described. First, after the movable die is positioned at the top dead center,
Loosen the fastening of the bolt 2b to remove it from the screw hole 2c of the wall 2d, and remove the divided small wall 2a from the wall 2d. Next, return spring 1
The cam slider 13 is moved in the arrow direction and pulled out while utilizing the biasing force of No. 4.

As described above, in the hanging cam unit 1, the cam slider 13 can be pulled out to the side opposite to the working direction and removed with the cam base 2 mounted on the movable die, so that the working tool (retainer 17 and retainer 17 and This makes it easy to replace the punch 18 (see FIG. 9) and the return spring 14.

Further, as shown in FIGS. 2 to 3, in the large hoisting cam unit 3 according to the second embodiment of the present invention, the base plate (see FIG. 10) fixed to the cam base 11a is divided into plates. Divided into bodies 4a, 4b, 4c, of which the front and side plate divisions 4a, 4b
Is fixed to the cam base 11a with a bolt, and the rear plate divided body 4c is fixed with a bolt 5 to a screw hole in the rear end surface of the plate divided bodies 4a, 4a.

As described above, after the large suspension cam unit 3 is set on the movable mold and the fixed mold,
When removing the cam slider 13a with the cam base 11a fixed to the movable die, the plate division body 4c is removed from the plate division body 4a by loosening the bolt 5, and the fall prevention plate 15b is removed. Then, by moving the cam slider 13a rearward, the U-shaped spring receiving member 6 integrated with the cam slider 13a slides downward on the upper surface of the plate divided bodies 4a, 4a to the rearward direction. The cam slider 13a can be pulled out.

On the upper surface of the cam slider 13a,
Also in the spring receiving member 6 fixed to receive the urging force of the return spring 14, the rear end portion thereof is divided into a separate horizontal receiving member 6a, and the spring receiving member 6 is fixed by the bolt 6b. It is fixed to. Therefore, by loosening the bolt 6b and removing the horizontal receiving member 6a, the return spring 14 can be replaced even when the cam unit 3 is set in the mold.

In the cam unit according to the third embodiment of the present invention, as shown in FIG. 4, the return spring 14 in the horizontal cam unit can be replaced with the cam unit still set in the mold. It was done. That is, the lower slider fixed to the cam slider 13b (see FIG. 7) is connected to the lower slider body 13e and the spring receiving member 13
It is divided into f and.

By dividing the lower slider, the movable die is moved to the top dead center position without removing the cam slider 13b and the lower slider body 13e from the die, and then the bolt 20 is loosened to remove the slip-off preventing member 19a. The return spring 14 can be taken out rearward by removing it from the cam base 11b, and then loosening the bolt 13g to remove the spring receiving member 13f from the rear end surface of the lower slider body 13e.

By thus dividing the portion of the rear end portion of the cam slider that receives the biasing force of the return spring 14, the return spring 14 can be easily replaced.

[0025]

As described above, the cam unit according to the present invention includes the cam base fixed to the movable mold, the cam driver fixed to the fixed mold, and the cam driver supported by the cam base. Is a suspension cam unit configured to reciprocate in a predetermined direction by a cam action of and to process an object to be processed with a fixed tool, wherein the cam slider is provided on a side opposite to the object to be processed. A part of the cam base is divided and made detachable so that it can be moved and pulled out from the cam base.Therefore, even when the processing tool is fixed to the cam slider, the cam slider is moved backward from the cam base (on the side opposite to the workpiece). ) And remove it. Further, by making a part of the cam base into a divided body, the divided body has a small and simple shape, which facilitates the production thereof, improves the material yield rate, and reduces the production cost. .

The cam unit according to the present invention comprises a cam driver, a cam base, and a cam slider that reciprocates in a predetermined direction by the cam base and the cam driver and that processes a workpiece with a fixed work tool. And a resilient member that is a biasing means for returning the cam slider in the cam base,
With the cam unit attached to the mold, a part of the cam base is disassembled to be detachable so that it can be moved to the side opposite to the object to be processed and pulled out from the cam base. The work is facilitated and the work for aligning the processing tool can be performed without being disturbed by the biasing force of the return spring.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a cam unit 1 according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a cam unit 3 according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a cam base and a base plate of the shaving unit 3.

FIG. 4 is an exploded perspective view of a cam base and a lower cam slider in the horizontal cam unit according to the third embodiment of the present invention.

FIG. 5 is an exploded perspective view of a small suspension cam unit according to a conventional example.

FIG. 6 is an exploded perspective view of a large-sized hanging cam unit according to the conventional example.

FIG. 7 is a front view of a horizontal cam unit according to the conventional example.

FIG. 8 is a perspective view of a small hanging cam unit according to the conventional example, in a state in which a processing tool is fixed.

FIG. 9 is a bottom view of the small-sized hanging cam unit according to the conventional example in a state in which the processing tool is fixed.

FIG. 10 shows a large-sized hanging cam unit according to the conventional example,
It is a perspective view of a cam base.

FIG. 11 is a horizontal cam unit according to the conventional example,
It is an exploded perspective view of a cam base.

[Explanation of symbols]

1 cam unit, 2 cam base, 2
a split small wall, 2b bolt, 2c
Screw hole, 2d wall, 2e receiving wall,
3 Large hanging cam units, 4a, 4b,
4c Plate division body, 5 bolts,
6 spring receiving member, 6a horizontal receiving member,
6b bolt, 11a, 11b cam base, 11c base plate, 11d rear part,
11e Vertical wall, 12, 12b Cam driver, 13, 13a, 13b Cam slider, 13c Tool mounting surface, 13d Lower slider, 13e Lower slider body, 13f Spring receiving member, 14 Return spring, 15a Sliding keeper, 15b Fall prevention plate, 16 forced return follower, 17 retainer, 18
Punch, 19, 19a removal prevention member,
20 volts.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shoji Nemoto             1-1-5 Nisshin-cho, Fuchu-shi, Tokyo Sankyo Oy             Reless Industry Co., Ltd. (72) Inventor Hideo Sakurai             1-1-5 Nisshin-cho, Fuchu-shi, Tokyo Sankyo Oy             Reless Industry Co., Ltd. F-term (reference) 4E050 DA07 DA10

Claims (2)

[Claims] 1. A cam base fixed to a movable mold, a cam driver fixed to a fixed mold, a cam base supported by the cam base, reciprocating in a predetermined direction by the cam action of the cam driver, and fixed. A hanging cam unit configured with a cam slider for processing an object to be processed with a processing tool, wherein the cam slider is moved to a side opposite to the object to be extracted from the cam base. A cam unit characterized in that a part of it is divided to make it detachable. 2. A cam unit comprising a cam driver, a cam base, and a cam slider which reciprocates in a predetermined direction by the cam base and the cam driver and which processes an object to be machined by a machined tool fixedly attached thereto. The elastic member, which is an urging means for returning the cam slider in the cam base, is moved to the side opposite to the object to be processed and can be pulled out from the cam base in a state where the cam unit is attached to the mold. A cam unit characterized by disassembling a part of the cam base to make it detachable.