JPH0340414Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a press mold for a press machine that bends and forms panels.

<Prior art> In panel press working, as shown in Fig. 5, the edge of the panel WA whose outer periphery has been punched out is first bent _B1 as shown by B, and then the first bend _B1 is made negative as shown by C. There are some that require corner bending _B2 .

A conventional general press die for such bending is shown in FIG. 6, in which a panel W set in a lower die 1 is held down by a plate holder 3 provided in an upper die 2.
First bend the edge of the panel W using the upper curved blade 4.
The bending mold M1 for _B1 and the panel W subjected to the primary bending _B1 are set on the lower mold 1a as shown in FIG. A driver cam 8 fixed to an upper die 2a which is movably installed and is in contact with a passive cam surface 7 of a cam block 6 having a lower die curved blade 5 bends the cam block 6 for the first time and moves the cam block 6 forward in the direction _B1 to move the cam block 6 forward in the negative direction. Corner bending B ₂ corner bending type M2
It was processed using two different press dies.

<Problems to be solved by the invention> As mentioned above, the conventional method requires two types of press molds, one for primary bending _B1 and one for negative angle bending _B2 , which naturally increases mold manufacturing costs. ,2
Since the process required multiple presses and was a two-step process, there was also a problem in improving work efficiency.

<Means for solving the problems> The present invention provides a press die that solves the above-mentioned conventional problems, and its characteristic configuration is that a workpiece set on the upper die body and the lower die body is placed on the upper die body. A block equipped with an upper mold curved blade for primarily bending the edge is provided so as to be movable up and down with a predetermined stroke and biased to the lower end position by a spring, and the primary bent work edge is attached to the lower mold body. A cam block is provided with a lower mold curved blade for secondarily bending at a negative angle, and a cam block that can move forward and backward toward the edge of the workpiece on the lower mold main body is installed, and a passive cam surface is formed on the cam block,
A driver cam is fixed to the upper die main body for abutting against the passive cam surface and moving the cam block forward;
A protrusion is provided on the lower die main body to allow movement of the cam block, and a protrusion is provided on the upper die main body to allow the movement of the cam block, and the block of the upper die body is provided with various primary bending portions that abut against the protrusion and define the primary bending completion position of the upper die curved blade. A distance block with a length corresponding to the completed position is detachably provided.

<Function> The present invention performs the primary bending process by the upper mold bending blade as the upper mold body moves downward, and the primary bending process is performed when the distance block provided on the block abuts the protrusion on the lower mold body. Complete processing. Subsequently, the driver cam of the upper mold main body that moves downward comes into contact with the passive cam surface of the cam block, and the cam block is moved forward to perform a secondary bending process on the first bent edge at a negative angle by the lower mold curved blade. do.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In FIG. 1, 10 is a lower mold main body, and 11 is an upper mold main body. In the upper mold body 11,
As shown in FIG. 2, there is a plate holder 12 that presses down the panel W set on the lower die main body 10 and the panel W.
A block 13 of a curved blade base is provided with an upper curved blade 14 that primarily bends the edge of the blade _B1 .
This block 13 is attached to the upper mold body 11 with side pins 1.
It is provided so as to be movable up and down with a predetermined stroke defined by reference numeral 6, and is biased to the lower end position by a spring 15.

On the other hand, in the lower mold body _{10 ,} as shown in FIG. Installed so that it can be moved.
The direction in which this cam block 18 moves forward and backward is toward the edge of the panel W on the lower die main body 10. The forward movement mechanism of the block cam 18 has a structure in which a passive cam surface 20 is formed at the rear end of the block cam 18, and a driver cam 23 that abuts the forward movement passive cam surface 20 is fixed to the upper mold body 11.

Furthermore, a protrusion 22 is provided on the lower die body 10 to allow movement of the cam block 18 through a long hole 21 provided in the cam block 18, and a protrusion 22 is provided on the block 13 of the upper die body 11 so as to abut the protrusion 22. A distance block 17 is provided that defines the primary bending completion position of the upper mold curved blade 14. This distance block 17 can be adjusted by replacing it with one having a different length depending on the position at which the primary bending is completed.

Next, the operation of the present invention having the above configuration will be explained with reference to FIG. Figure 4A shows the upper mold body 11
The panel W to be processed is set on the lower mold body 10. As the upper mold body 11 moves downward, the plate retainer 12 comes into contact with the panel W, as shown in FIG. 4B, and presses and fixes the panel W onto the lower mold body 10. Subsequently, as shown in _FIG .
The cam block 18 starts to be pushed toward the edge of the panel W. Next, as shown in FIG. 4D, the distance block 17 comes into contact with the protrusion 22, restricts the downward movement of the block 13, and completes the primary bending _B1 , and the lower die curved blade 19 completes the primary bending _B1 . It hits the tip and begins a secondary bend at a negative angle. Thereafter, the upper mold continues to move downward, and the block 13, whose downward movement is regulated by the distance block 17, moves relative to the upper mold main body 11, and the driver cam 23 pushes the cam block 18, and the upper mold main body As shown in FIG. 1 at the bottom dead center of 11, the lower mold curved blade 19 completes the negative angle secondary bending _B2 .

<Effects of the invention> As described above, according to the invention, primary bending and negative angle secondary bending can be performed simultaneously with one press mold, reducing the number of molds and processes, and reducing mold costs. This results in a reduction in processing efficiency and an improvement in machining efficiency. In addition, distance blocks with lengths corresponding to various primary bending completion positions that come into contact with protrusions protruding from the lower mold body to define the primary bending completion positions of the upper mold bending blades can be attached to and removed from the blocks on the upper mold body. With this structure, when changing the primary bending process for different lengths, the setup change can be completed by replacing only the small, lightweight distance block, without having to replace the entire large and heavy mold body. , changeover can be achieved in a short time and with light work, and primary bending of various lengths can be performed with high precision at low cost.

[Brief explanation of drawings]

Figure 1 is a sectional view of the main parts of the press die according to the present invention.
Figure 2 is a sectional view of the upper mold, Figure 3 is a sectional view of the lower mold, Figure 4 A, B, C, and D are explanatory diagrams of the operation of the present invention, and Figure 5 is an explanation showing the processing order of the panel. 6 is a sectional view of a main part of a conventional press mold for primary bending, and FIG. 7 is a sectional view of a main part of a press mold for secondary bending with the same negative angle. 10...lower mold body, 11...upper mold main body, 13...
...Block, 14...Upper curved blade, 15...Spring, 17...Distance block, 18...
Cam block, 19...lower curved blade, 20...passive cam surface, 22...protrusion, 23...driver cam.

Claims (1)

[Scope of utility model registration request] A block equipped with an upper die curved blade for primarily bending the edge of the workpiece set on the lower die body is installed in the upper die body so that it can move up and down with a predetermined stroke and is biased to the lowering end position by a spring. a lower die body is provided with a lower die curved blade for secondarily bending the edge of the workpiece that has been bent primarily at a negative angle; a cam block that is movable forward and backward toward the edge of the workpiece on the lower die body is installed; A passive cam surface is formed on the upper mold body, a driver cam that contacts the passive cam surface and moves the cam block forward is fixed to the upper mold body, and a protrusion is provided on the lower mold body to allow movement of the cam block. The block of the upper die main body is detachably provided with a distance block having a length corresponding to the various primary bending completion positions that comes into contact with the protrusion and defines the primary bending completion position of the upper die curved blade. A press type characterized by: