JPH0128895Y2 - - Google Patents

Description

[Detailed description of the invention] a. Industrial application field The present invention relates to a rotary leaf ohming mold, and more specifically, an upper mold body is provided with an upper mold rotatably provided on the lower end surface, and the upper mold body is An upper type driver is installed that is guided through a large diameter hole in the upper axis of the machine and is raised and lowered by the impact of the ram and the increased urging force of the bullet.
A pin member is provided that engages with a drum-shaped grooved cam member that is rotatable with a shaft provided at the lower shaft center of the large diameter hole, and is biased toward the shaft center. This invention relates to a rotary ohming mold equipped with a gear device that is rotationally driven.

b. Prior art This invention was filed in 1983 by the same applicant.
-No. 076906 (filed on May 27, 1982), and was also published in 1982.
-This is an improvement to No. 194826 (published on December 24, 1982).

That is, prior to the above-mentioned application, when bending the edge of a disposable container using, for example, a thin metal plate or paper as a material, upper and lower molds were prepared for each shape and size and press working was performed. Therefore, different types of upper and lower molds had to be prepared in pairs for each size and shape, and there was no mold suitable for high-mix, low-volume production.

c. Problems that the invention aims to solve As mentioned above, the applicant's earlier invention solved the inconveniences of the conventional device, but because it used a surface cam with a fine pitch in the radial direction, dust etc. accumulated and the upper mold There was an inconvenience that a rotation error occurred.

d Means to solve the problem The present invention uses a rotary cam equipped with a drum-shaped grooved cam instead of the surface cam of the conventional device, and processes the drum-shaped cam body into 12 equal parts to produce rough pitches. I decided to do it. At the same time, a gear device was installed to reduce the rotation angle of the rotary cam, thereby stabilizing the rotation angle of the upper die to an accurate small angle, thereby eliminating the occurrence of rotation errors.

e Effect As is already clear from the above explanation, the rotary cam that rotates the upper mold is a coarsely pitched grooved cam carved around the drum-shaped body, so there is no risk of dust etc. accumulating. This made it possible to create a rotary leaf ohming mold with no rotation errors.

f Embodiment FIG. 1 is a perspective view of an embodiment of the rotary worming mold 1 of the present invention, and FIG. 2 shows an example in which it is installed in an upper turret 5 such as a turret punch press 3. Ta.

The turret punch press 3 shown in FIG. 2 will be explained first. The upper turret 5 described above is mounted on the upper horizontal part of the machine frame 7.
However, the lower turrets 9 are rotatable synchronously in the lower horizontal part while maintaining a parallel state separated from each other, and the upper turret 5 corresponds to the upper mold 11, and the lower turret 9 corresponds to the upper mold 11. A large number of lower molds 13 are attached.

When punching out a desired size and shape, the corresponding pair of upper die 11 and lower die 13 is positioned directly below the striker 15, and the workpiece plate W is gripped by the gripping claw device 19 of the numerically controlled plate movement and positioning device 17. The mold is moved in the X and Y directions and positioned between the upper mold 11 and the lower mold 13.

Next, the ram 21 (see Fig. 3) of the turret punch press 3 is driven to strike the workpiece W with the striker 15.
A very common way to use the turret punch press 3 is to punch out a desired hole at a desired position.

The present invention and the previous invention of the same applicant mentioned above are:
Using such a numerically controlled turret punch press 3, the four corners are
He devised a mold that was convenient for making disposable plates and other items that were connected to adjacent sides by a quarter-circle arc.

As is clear from FIG. 3, the lower part 13 is provided with a disc-shaped protrusion 21 whose radius is the same as the desired radius of curvature, and an appropriate number of ejector plates 2 are provided around the periphery.
It is provided with an upward biasing force of 3 bullets 25 and is mounted on the lower turret 9.

In the rotary ohming mold 1, an upper mold body 27 is fixed on the upper turret 5 through a keyway 29 and a key 31 so as to be unrotatable and can be raised and lowered, and is in the floating state shown in FIG. is held in

The above-mentioned upper mold body 27 has a large diameter hole 35 in the upper axis, and the upper mold driver 3 whose rotation is regulated by a key 37 (see Fig. 1) is inserted into the large diameter hole 35.
9 is provided so that it can be raised and lowered freely.

An upper mold driver 39 is provided on the upper end surface of the upper mold body 27.
An annular lid 41 (there are two metal fittings in FIG. 1) is provided to prevent the metal from falling off.

At the top of the upper driver 39 is a driver rod 4.
The upper surface of the annular lid 41 and the driver cap 45 are provided.
A return spring 47 is compressed and provided between the lower surfaces of the upper mold driver 39 to position it at the upper limit.

Further, a buffer ring 49 is provided on the lower surface of the annular lid 41.

At the axial center position of the bottom of the large diameter hole 35 described above, there is a shaft 5 which is freely rotatable and passes through the lower axial center of the upper mold body 27.
1, and a drum-shaped groove member 53 is fixed to the shaft 51 at the bottom of the large diameter hole 35.

Further, a saw blade-shaped groove cam 55 is carved in the drum-shaped body of the groove member 53, and the groove member 53 has a saw blade-shaped groove cam 55 carved therein.
Pin member 5 that engages with grooved cam 55 in the diametrical direction of 7
7 is biased in the axial direction by a bullet 59.

A drive gear 61, which is part of a gear device, is provided on the outer periphery near the lower end of the shaft 51.
An internal gear 67 provided on the outside of the upper surface of the rotary upper die 65 is driven via an intermediate gear 63 attached from below.

The above-mentioned rotating upper mold 65 is rotatably attached to the lower end surface of the upper mold body 27 by an annular member 69, and a downward protrusion 73 with a sloped surface 71 is provided in a part of the lower surface. .

FIG. 4 is an enlarged view of the groove member 53. A saw blade-shaped groove cam 55 is provided on the drum-shaped body of the groove member 53, and the diagonal groove 75 and the vertical groove 77 are connected at two places, upper and lower. There is.

In this case, the pin member 57 shown in broken lines in FIG.
Although it is written that the groove member 53 moves in the direction of the arrow, in reality, the groove member 53 rotates from right to left in FIG. 4, and the pin member 57 is configured to move only in the vertical direction. be.

In other words, both the diagonal grooves 75 and the vertical grooves 77 are carved deeper at the part where they move to the later groove, and the later groove depth is deeper than the previous groove depth. Both grooves become shallower as they move towards each other.

The sawtooth grooved cam of the groove member mentioned above is carved by, for example, 12 pitches around one circumference of the body of the drum, and the rotation of the upper rotary die is reduced to one-sixth by a gear device. Let's consider a case where it is reduced.

In this case, each time the workpiece is pressed and bent once between the protrusion of the upper rotating die and the lower circular protrusion, the upper rotating die rotates in a fixed direction by 5 degrees based on the central angle. Therefore, if you use 18 strokes, you can bend 90 degrees.

g. Effects of the invention The mold that embodies the technical idea of the invention described in detail above is capable of bending a desired central angle with a constant curvature using a relatively simple mechanism, and it The inconvenience of having to prepare a large number of molds for bending at once has been streamlined by using a small number of molds.

In addition, we used a serrated grooved cam with a coarse pitch in the vertical direction for the mechanism that rotates the upper rotary mold, so there is no risk of dirt accumulating on the cam and causing rotation errors, and the gear device prevents the coarse pitch from accumulating on the cam. By reducing the rotation of the pitch cam groove, accurate rotation could be ensured.

It is also clear that the design can be easily changed without departing from the technical idea of the present invention.

[Brief explanation of drawings]

Fig. 1 is a partial cross-sectional perspective view of the rotary leaf worming mold of the present invention, Fig. 2 is a perspective view of a numerically controlled turret punch press as an example machine equipped with the mold of the present invention, and Fig. 3 is a perspective view of the rotary leaf worming die of the present invention. FIG. 4 is an enlarged partial view of the grooved cam, and FIG. 5 is a cross-sectional view taken along the arrow - in FIG. 4. Explanation of the symbols representing the main parts of the drawings: 1...Rotary worming mold, 3...Turret punch press, 21...Disc shaped projection, 27...Upper mold body, 35...Large diameter hole, 39 ...Upper type driver, 5
3... Groove member, 55... Groove cam, 57... Pin member, 63... Intermediate gear, 65... Rotating upper mold, 7
5...Diagonal groove.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An upper mold body is provided with an upper mold rotatably provided on the lower end surface, and the upper mold body is guided by a large diameter hole provided at the upper axis of the upper mold body, and is guided by the impact of the ram. An upper driver is provided which is moved up and down by the upward biasing force of the bullet, and engages with a drum-shaped grooved cam member that is rotatable together with a shaft provided at the lower shaft center of the large diameter hole, and is attached toward the shaft center. 1. A rotary leaf worming mold, characterized in that a biased pin member is provided, and a gear device rotatably driven by the above-mentioned shaft is provided on the above-described upper mold. (2) The drum-shaped grooved cam member has a saw-blade-shaped grooved cam surrounding the body of the drum part, and the part where it moves from the diagonal part to the next vertical part and the part where it moves from the vertical part to the next diagonal part. The groove bottom is deeper at the rear part, and the groove cam is inclined so that the groove depth becomes shallower in the direction of movement in the diagonal part and the vertical part. A rotary leaf worming mold according to claim 1 of the utility model registration claim.