JPS5849143Y2 - Coil spring set structure for press die cam - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a coil spring set structure in a bias cam of a press mold.

Conventionally, components for setting a return spring for returning a passive cam in a press die's bias cam include, for example, a nut 31 and a press lower die 4 as shown in FIG.
0 attached to the support stand 32, a collar 33 attached to the support stand 32, a support stand 34 attached to the passive cam 41, a collar 35 attached to the support rod 37, a collar 35 attached to the lower press die 40. A support bar 37, oak) 38 supported on a support base 36.32 and having a collar 33.35.
．． It consists of 39 9 points.

Therefore, the workability of disassembling and assembling the return 319 and fufu 420 is very poor.

In view of the above, the object of this invention is to provide a coil spring set structure for a bias cam of a press mold, which has a small number of parts and is easy to disassemble and assemble.

This invention will be explained below based on drawings showing embodiments.

In Figs. 1 to 3, the bottom surface 3 of the recess 2 of the lower press die 1
A sliding plate 4 is provided laterally on the sliding plate 4, and a passive cam 5 is placed on the sliding plate 4 so as to be movable laterally.

A cam surface 6 that slopes from above to the lower right is formed at the right end of the passive cam 5, and a horizontal hole 7 with a circular cross section that extends rightward from the left end is formed. A vertical hole 8 having a circular cross section and intersecting at right angles is provided downward from the upper surface of the passive cam 2.

A spring presser block 9 is loosely fitted into the horizontal hole 7, and its right end portion is formed into a trapezoidal conical portion 10.

An attachment load setting block 11 is inserted into the vertical hole 8 from above.

The mounting load setting block 11 has a two-step inclined surface 11a that can contact the conical surface 10a of the trapezoidal conical portion 100 of the spring presser block 9.

11b, and between both inclined surfaces 11a and Ilb is a vertical surface 11c that can come into contact with the end surface 10b of the trapezoidal conical portion 10.

In addition, in FIG. 1, the inclined surface 11a is in contact with the conical surface 10a of the trapezoidal conical portion 100.

A flange 11 is attached to the upper end of the mounting load set block 11.
d is provided, and the mounting load setting block 11 is set to the passive cam 5 by this flange 11d and bolts 19.

Note that the stroke of the spring presser block 9 by the mounting load setting block 11 is a.

Reference numeral 12 denotes an upper press die which is movable up and down relative to the lower press die, and a fixed cam 13 is attached to its lower end.

The fixed cam 13 has a cam surface 14 that is in surface contact with the cam surface 6 of the passive cam 5, and a sliding plate 16 provided on the cam 13 allows the fixed cam 13 to move along the guide surface of the upright wall 150 of the lower die 1 on the press. It moves up and down as the mold 12 moves up and down.

When the fixed cam 13 descends, the passive cam 5 moves to the cam surfaces 6, 14.
When the fixed cam 13 descends to the lowest position, the stroke of the passive cam 50 is b.

A return spring 17 with a free length C is inserted into the horizontal hole 7.

As the passive cam 5 moves to the left in FIG.
When the fixed cam 13 moves to the left end, that is, when the fixed cam 13 descends to the lowest position, the total amount of deflection of the return spring 17 is d2a+b.

In the above configuration, in order to set the return spring 17, as shown in FIG.
With the two recesses removed, the spring presser flock 9 and return spring 17 are inserted into the horizontal hole 7.

Insert the passive cam 5 in this state into the recess 2 and
It is placed at the position shown by the dotted chain line, that is, at the zero stroke position.

At this time, the return spring 17 can be deeply inserted into the horizontal hole 7 of the driven cam 5 by providing the vertical hole 8, and the return spring 17 can be inserted slightly outward from the horizontal hole 7 of the driven cam 5. As shown in FIG. 2, the dimensions of the recess 2 are set so as not to contact the lower press die 1.

Next, as shown in FIG. 3, when the mounting load set flock 11 is inserted into the vertical hole 8 from above, the spring presser block 9 is pushed to the left by its slope 11b, and the vertical surface 11c is pushed against the spring presser block 290 trapezoidal conical part 10. end face 10 of
b, and the slope 11 of the mounting load set block 11
a contacts the conical surface IQa of the trapezoidal conical portion 100.

Therefore, the return spring 17 is bent by an amount a.

This state is the state before the start of press work.

To perform press work, the fixed cam 13 is moved up and down together with the press upper die 12.

That is, the passive cam 5 moves a distance b to the left as the fixed cam 13 descends, performs horizontal hole drilling or bending on a workpiece (not shown), and as the fixed cam 13 rises, the passive cam 5 moves against the workpiece by the elasticity of the return spring 17. Return to the position before processing.

As described above, this invention includes a vertical hole 8, a spring holding block 9, and an attachment load setting flock 11 as components for setting the return spring 17 on the passive cam 5.
Therefore, when the spring presser block 9 and the return spring 17 are inserted into the horizontal hole 7 of the passive cam 5, and the mounting load setting block 11 is not inserted into the vertical hole 8, the return spring 17 will not fit into the horizontal hole 7. Since the return spring 17 can be inserted deeply, the return spring 17 will not be caught by the lower press die when the passive cam 5 is inserted into or taken out from the recess 2 of the lower press die 1.

Therefore, the operator does not need to pay special attention when moving the passive cam 5 into and out of the recess 2.

With respect to the passive cam 5 set in the recess 2,
The return spring can exert its elastic force by simply inserting the mounting load setting block 11 into the vertical hole 8 from above and fixing it to the passive cam 5.

That is, the passive cam 50 can be attached and detached from the lower mold 1 more easily than before.

Further, since the only component parts for setting the return spring 17 to the passive cam 5 are the spring holding block 9 and the mounting load setting block 11, the number of parts is reduced compared to the conventional case, resulting in cost reduction.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with Fig. 1 being an overall explanatory view, Figs. 2 and 3 being explanatory drawings showing the order of assembly, and Fig. 4 being a coil spring in a conventional press die cam. An explanatory diagram of the set structure is shown. 1...Press lower die, 5...Passive cam,
6, 14...Cam surface, 7...Horizontal hole, 8
... Vertical hole, 9 ... Spring holding block, 11 ... Mounting load set flock, 13
...Fixed cam, 17...Return spring.

Claims (1)

[Scope of utility model registration request] A passive cam has a diagonal cam surface at one end and is supported by the lower press die so as to be movable laterally with respect to the lower press die, and a passive cam is attached to the lower end of the upper press die that moves up and down with respect to the lower press die. , a fixed cam that has a cam surface at its lower part that makes surface contact with the cam surface of the passive cam, and that pushes the passive cam to one side in the lateral direction via both cam surfaces as the press upper die descends; In the press die bias cam, the return spring is provided between the press die and the passive cam and is compressed by the passive cam when the press upper die is lowered, and pushes the passive cam back to the other side in the lateral direction when the press upper die is raised. A horizontal hole extending from the other end side to one end side and a vertical hole extending vertically intersecting the horizontal hole at the inner end of the horizontal hole are provided, and a spring presser block is inserted into the horizontal hole so that the vertical hole side A mounting load set block whose end is shaped like a trapezoidal cone and has an inclined surface that contacts the trapezoidal cone of the spring presser block is inserted into the vertical hole and fixed to the passive cam, and the return spring is attached to the spring presser block. A coil spring set structure characterized by being housed in a horizontal hole between the and the lower press die.