JPS595372B2 - press equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to reduce the number of die setting steps (man-hours for setup) by holding the upper die of a press mold with cushion pins that are usually attached to single action presses, and This invention relates to a press device designed to improve safety during work and press work.

As a conventional single action press and a press mold attached to this press, there is, for example, one shown in FIG.

The figure shows an example of a blank die for cutting a rolled steel plate (hereinafter referred to as "material"). In the conventional die set, U-shaped grooves 6 as shown in FIG. Insert the lower mold and fix it with a nut through the washer, and then align the U-shaped groove 6a similar to the lower mold provided in the upper mold 2 with the T-shaped groove provided in the slide 4, The upper die is fixed and assembled using bolts D1, washers, and nuts. After the upper mold and the lower mold have been fixed, the material A is fed into the mold, and as the upper mold 2 descends, the material is pressed down by the pad 9, which has a spring 10 inside, and the upper and lower molds are cut. Blade T
, 8 cut the material, and the cut material is transferred to the roller conveyor 1.
1, it is configured to be transported out of the mold. however,
Conventional press devices like this had a structure in which the upper and lower dies were securely tightened and fixed to the press slide and bolster, respectively, using bolts and nuts, so there were many places to secure them with bolts and nuts. (usually 8 to 16 locations per die set), it takes a lot of time to set the die. There was a problem in that after bolts and nuts were installed at a large number of fixed locations, strict checks were required to prevent forgetting to tighten them. This invention was made by focusing on such conventional problems, and only the lower mold is fixed to the bolster with bolts and nuts, and the upper mold is a cushion inserted into the through hole of the cushion pit provided in the lower mold. The purpose of the present invention is to solve the above problems by configuring the device to be held with pins. The present invention will be explained below based on the drawings. FIG. 2 is a diagram showing an embodiment of the present invention, and the same members as in FIG.

To mainly explain the configuration that is different from FIG. 1, the lower mold 1a has a U-shaped groove and a bolster 3a(!) T-shaped groove as shown in FIGS. 1 and 4, similar to the conventional die set. are aligned and fixed with bolts and nuts as in FIG. 1, and through holes 13 for cushion pins C are formed directly below each guide portion E. The structure of the upper mold 2a is
The mold structure is almost the same as the conventional mold structure, but the upper mold 2a is placed A facing the slide of the press, and the guide portion E2 of the upper mold is held by a cushion pin C inserted into the through hole 13 of the lower mold. The upper mold 2a and the lower mold 1a held by the cushion pins C are in a state where the guide portions E and C are fitted as shown in the figure. When the slide 4 of the press rises and separates from the upper die 2a, each cushion pin is lifted to a predetermined height by a cushion cylinder and a cushion pad (not shown), and the spring 10
A constant clearance B is always maintained between the lower surface of the pad 9 having the pad 9 installed therein and the upper surface of the cutting blade 7 of the lower die. Na trigram, 1
5 is an elastic member provided on the upper surface of the upper die 2a. Next, the effect will be explained.

As mentioned above, the cushion pin C disposed in the cushion pin through hole 13 provided in the lower mold has a clearance B when the slide 4 is raised and separated from the upper mold 2a.
The upper mold is held so as to keep it approximately constant.

Therefore, when a predetermined amount of material A to be cut is fed into the clearance B section and the slide 4 is then lowered, the slide 4 comes into contact with the elastic member 15 provided on the upper surface of the upper die 2a held by the cushion pin C. Then, the upper mold is lowered by overcoming the cushion pressure of the cushion pin holding the upper mold. The elastic member 15 is effective in absorbing and alleviating the impact when the slide 4 comes into contact with the upper die. Therefore, when impact is not a big problem, a metal plate or the like may be used instead of the elastic member, and the upper surface of the upper mold may be flat. Next, as the upper mold descends, the material A is held down by the pad 9 with a spring 10 installed inside, and the material is cut between the cutting blade 7 of the lower mold and the cutting blade 8 of the upper mold, and the cut material is It is transported out of the mold by a roller bearing 11.

After cutting the material, the slide 4 rises, and at this time, the upper mold follows the slide under pressure from the cushion pin C, but after a predetermined clearance B is secured, only the slide 4 rises. It moves away from the upper mold and stops at top dead center. As mentioned above, the upper die and the lower die are always held in a state where the guide parts E and E' are fitted, and when the slide is separated from the upper die, the clearance B is always maintained at a constant amount B. Therefore, there is no need to fix the upper die to the slide. FIG. 3 shows another embodiment.

In this embodiment, a plurality of cushion pin through holes 13b are provided at a location other than the guide portion E of the lower mold 1b, and the through holes 13b are
A main cushion pin C and an auxiliary cushion pin C1 are disposed on the upper mold, and the upper mold is held by a cushion pin receiving portion 12 provided on the upper mold. A cylindrical member 14 having wear resistance is fixed to the through hole 13b of the lower mold,
This prevents wear of the through hole in the lower mold due to the vertical movement of the cushion pin. As mentioned above, as an embodiment of the present invention, only a press device using a blank die has been disclosed, but it goes without saying that it can be applied not only to a blank die but also to cases where other types of press dies are used. .

As explained above, according to the present invention, the configuration is such that a plurality of cushion pin through holes are provided in the lower mold, the cushion pins are passed through the through holes, and the cushion pin is inserted into the upper mold without fixing the upper mold to the slide of the press. Since the upper die is held in place, there is no need to fix the upper die to the slide with bolts and nuts, etc., which reduces the number of die sets required when changing the die, and makes it easier to tighten bolts and nuts. You can get the tremendous effect of not having to worry about forgetting things.

[Brief explanation of drawings]

FIG. 1 is a front view showing a conventional press device, and FIG. 2 is a cross-sectional view of the main parts showing the structure of the press device according to the present invention, in which the upper die is held by a cushion pin penetrating the lower die.
FIG. 3 is a sectional view of the main part of another embodiment of the present invention, and FIG. 4 is a partially cutaway view showing a U-shaped groove provided in the lower die. 1, 1a, 1b... lower mold, 2, 2a, 2b...
... Upper mold, 3, 3a, 3b ... Bolster,
4...Slide, 12...Upper cushion pin receiver, 13, 13b...Cushion pin through hole, C...Cushion pin, C1...
...Auxiliary cushion pin.

Claims (1)

[Claims] 1. A press equipped with a plurality of cushion pins biased by a cushion cylinder, a lower mold fixed to the bolster of this press and having the cushion pins penetrated, and a press arranged opposite to the slide of the press and attached to the lower mold. 1. A press device comprising an upper mold that is engaged to be movable up and down and held by the cushion pin.