JPH06521U - Backup device for guide cam in press type - Google Patents

Abstract

(57) [Abstract] [Purpose] To simplify the guide cam backup device in the press die. [Structure] A processing cam 3 installed on a guide cam 2 of a lower die 1 is provided with a wedge-shaped backup actuating driver 10 on an end surface 3a on the side where a curved blade 7 is provided, while protruding in a movement axis direction. The curved blade installation portion 11 of the cam 2 has a through hole 11a.
In addition, a backup block 12 having a plate cam 12b vertically installed is attached to the back surface 11b of the curved blade installation portion 11 so as to be vertically movable. Then, the plate cam 12b is wedged with the backup actuating driver 10 that moves horizontally relative to the guide cam 2 so that the back surface 11b of the curved blade installation portion 11 and the receiving surface 1a of the lower die 1 at the bottom dead center of the press. The head 12a of the backup block 12 intervenes between and.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a guide cam back-up device in a press die for bending an edge of a panel.

[0002]

[Prior art]

 Conventionally, a press die for bending a panel edge is provided with a guide cam that is horizontally movable on a lower die and a processing cam that is relatively movable on the guide cam. The guide cam and the processing cam are moved relative to each other by the wedge engagement of the driver provided on the upper die, and the curved blades provided on the facing surfaces of the guide cam and the processing cam are brought closer to each other to bring the panel end edge. Bending is often used.

In this type of press die, the curved blade load of the processing cam due to the wedge engagement of the driver is received only by the casting of the portion where the curved blade of the guide cam is provided. If it is thin, it will bend and crack, resulting in damage. If the wall thickness is increased to prevent this, it is necessary to reduce the wall thickness of the lower die panel receiving surface due to space constraints, and as a result, the stability of the panel is deteriorated and the product accuracy varies. It becomes a malfunction. In order to eliminate such inconveniences, a structure has been proposed in which the curved blade load on the guide cam is backed up. An example of such a backup device is, for example, Japanese Utility Model Laid-Open No. 63-189415. The backup device described in this publication rotates a backup roller via an operating arm that constitutes a link mechanism by the movement of a shaft fixed to a processing cam, and backs up the back surface of the guide cam and the lower die. The backup roller is interposed between the receiving block and the receiving block.

[0004]

[Problems to be solved by the device]

 The backup device described in the above publication has a complicated structure and a large number of parts, and there is a limit to the reduction of the press type manufacturing cost. Therefore, it is a technical problem to be solved in the present invention to simplify the structure of the backup device.

[0005]

[Means for Solving the Problems]

 To this end, the following backup device was created. That is, a guide cam installed horizontally on the lower mold and a processing cam installed on the guide cam so as to be movable relative to each other are used for the wedge fitting of the driver installed on the upper mold that moves up and down. The guide cam and the processing cam are moved relative to each other, and the curved blades provided on the facing surfaces of the guide cam and the processing cam are brought closer to each other to bend the work edge, A backup device, which is a backup operation driver fixed to the end surface of the machining cam on the side where the curved blade is provided by penetrating the guide cam in the movement axis direction of the machining cam, and the curved blade of the guide cam. It is attached to the back of the side where the upper die is installed so that it can move up and down, and when the upper die is positioned above it descends to the retracted position. When the upper die descends, it moves horizontally relative to the guide cam. The backup block is provided with a backup block which is raised by a wedge engagement with the backup operation driver and intervenes between the back surface of the curved blade installation portion of the guide cam and the lower mold of the portion facing the back surface. It has a feature.

[0006]

[Action]

 In the backup device configured as described above, during bending of the work edge by the press die, the backup operation driver is moved together with the processing cam along with the lowering of the upper die, and the backup operation is wedged into the backup operation driver and raised. The block is inserted between the rear surface of the curved blade installation portion of the guide cam and the lower die of the portion facing the rear surface to back up the guide cam, and the curved blade load of the processing cam is received by the lower die main body side. It can be done.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The press die shown in FIG. 1 has a guide cam 2 installed on the lower die 1 so as to be horizontally movable, and a processing cam 3 installed on the guide cam 2 so as to be relatively movable. The curved blades 6 and 7 provided on the facing surfaces of the guide cam 2 and the processing cam 3 are brought closer to each other by the wedge engagement of the driver 5 provided on the vertically moving upper die 4, and the thin plate-shaped workpiece ( (It is also called a panel.) The structure is such that the edge of W is bent. The central portion of the work W is pressed by the book pad 8 of the upper die 4, and the end of the work W is placed on the curved blade 6 of the guide cam 2 by the cam pad 9 which is installed so as to be relatively movable on the book pad 8. It is pressed.

Next, a backup device for the guide cam 2 will be described. As shown in FIGS. 1 to 3, a back-up actuating driver 10 projects on the end surface 3a of the machining cam 3 on the side where the curved blade 7 is provided, in the moving axis direction (horizontal direction) of the machining cam 3. It has been set up. The backup operation driver 10 has a rectangular cross section and is formed in a wedge shape having an inclined surface 10a on the upper surface of the tip portion. On the other hand, the curved blade installation portion 11 of the guide cam 2 facing the end surface 3a of the processing cam 3 is formed with a through hole 11a into which the backup operation driver 10 can be inserted, and the curved blade installation portion 11 has a rear surface 11b. A plate cam guide 11c having a vertical insertion hole 11d is provided.

A backup for backing up the processing cam 3 during bending by intervening between the back surface 11b of the curved blade installation portion 11 of the processing cam 3 and the receiving surface 1a of the lower die 1 facing the back surface 11b. The block 12 has a substantially rectangular parallelepiped head 12a whose front and rear end surfaces are respectively formed so as to be capable of contacting the back surface 11b and the receiving surface 1a, respectively, and the block 12 is hung vertically from the head 12a and inserted into the insertion hole 11d. And a plate cam 12b having a rectangular cross section. The plate cam 12b is formed in a wedge shape having a slope 12c capable of contacting the slope 10a of the backup operation driver 10 at the lower end, and is slidably fitted in the insertion hole 11d of the plate cam guide 11c in the vertical direction. . Therefore, when the backup actuating driver 10 and the plate cam 12b move relative to each other with the slopes 10a and 12c in contact with each other, the backup block 12 is moved up and down. As shown in FIG. 3, the backup block 12 has a spring support seat 12d formed on a side portion of the plate cam 12b, and a compression spring 12e mounted between the plate cam guide 11c and the upper spring receiving surface of the plate cam guide 11c. It is configured so that it is always urged downward.

Next, the operation of the backup device configured as described above will be described. As shown in FIG. 1, the press die equipped with the backup device of the present invention is provided on the facing surface of the guide cam 2 and the processing cam 3 by the wedge engagement of the driver 5 provided on the upper die 4 which moves up and down. The curved edges 6 and 7 are moved closer to each other to bend the edge of the work W. In this bending process, when the driver 5 wedges with the guide cam 2 and the processing cam 3 on the lower mold 1 as the upper die 4 descends, the guide cam 2 moves to the right in FIG. Goes left. At this time, when the guide cam 2 moves to the right to open the back surface 11b and the receiving surface 1a at a predetermined interval, the machining cam 3 moves to the left to cause the backup operation driver 10 and the plate cam 12b of the backup block 12 to wedge. Then, the backup block 12 is lifted, and the head 12a of the backup block 12 is placed between the back surface 11b of the curved blade installation portion 11 of the guide cam 2 and the receiving surface 1a of the lower mold 1 facing the back surface 11b. The operation timings of the guide cam 2 and the processing cam 3 are set so as to forcefully intervene.

When the backup actuating driver 10 has moved to the leftmost end, that is, at the bottom dead center of the press, the backup block 12 has already risen, and the curved blade installation portion 11 of the guide cam 2 is backed up. The bending blade load of the processing cam 3 during bending of W can be received by the main body side of the lower mold 1. After the bending process, when the machining cam 3 moves to the right as the upper die 4 and the driver 5 move upward, the backup actuating driver 10 also moves to the right, so that the plate cam 12b has a wedge-fitting relationship in which the compression spring 12e is attached. Due to the force, the backup block 12 first descends to the retracted position. That is, the operation timings of the guide cam 2 and the processing cam 3 are set so that the guide cam 2 returns to the left end position shown in FIG. 2 after this retracting operation.

As described above, in the backup device of this embodiment, the backup operation driver 10 and the plate cam 12b constitute a cam mechanism, and the backup block 12 is moved up and down by a predetermined operation timing. It is the one.

[0013]

[Effect of device]

 According to the present invention, at the time of the bottom dead center of the press, the backup block is forced to intervene between the guide cam and the lower die so that the curved die load is received by the lower die body, so the guide cam is made thinner. Even if the guide cam is not damaged or the rigidity is insufficient, therefore, the guide cam can be made compact, and the work is stable, which improves the machining accuracy and improves the quality. In particular, the backup device of the present invention moves the backup block up and down by advancing and retracting the backup operation driver, and basically the main part is composed of two parts, so the press die manufacturing cost is low. There is an effect that.

[Brief description of drawings]

FIG. 1 is a sectional view of a press die including a backup device for a press die guide cam according to an embodiment of the present invention, showing a state at the time of bottom dead center of the press.

FIG. 2 is a cross-sectional view of a press die equipped with a backup device for a press die guide cam according to an embodiment of the present invention, showing a state of the press at the top dead center.

FIG. 3 is a perspective view showing a backup block and a compression spring according to an embodiment of the present invention.

[Explanation of symbols]

 W Work 1 Lower model 2 Guide cam 3 Processing cam 4 Upper model 5 Driver 6 Curved blade 7 Curved blade 10 Backup operation driver 10a Slope 11 Curved blade installation part 12 Backup block 12a Head 12b Plate cam 12c Slope 12d Spring support seat 12e Compression Spring

Claims (1)

[Scope of utility model registration request] 1. A wedge of a driver provided on an upper die which is provided with a guide cam installed on the lower die so as to be horizontally movable, and a processing cam installed on the guide cam so as to be relatively movable. Backup of the guide cam in a press die in which the guide cam and the processing cam are moved relative to each other so that curved blades provided on the facing surfaces of the guide cam and the processing cam are brought closer to each other to bend the work edge. In the device, a backup operation driver fixed to the end surface of the processing cam on the side where the curved blade is provided by penetrating the guide cam in the moving axis direction of the processing cam, and the curved blade of the guide cam. It is attached to the rear surface on the side where it is installed so as to be able to move up and down, and when the upper die is positioned above it is lowered to the retracted position, and when the upper die is lowered, it moves horizontally relative to the guide cam. Of a guide cam in a press die equipped with a backup block that is raised by a wedge engagement with the backup actuation driver and intervenes between the back surface of the curved blade installation portion of the guide cam and the lower die of a portion facing the back surface. Backup device.