JPS6347381Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a press die for press-molding a workpiece.

For example, as disclosed in Japanese Patent Application Laid-Open No. 57-31423, the press die in a conventional press machine is positioned only by a pressing member (hereinafter referred to as a presser) against the lower die when it is set in the press position. Since this positioning is difficult, this positioning is performed using a supporting member (hereinafter referred to as the upper mold holder), and the presser and upper mold holder are set in a combined state in the press machine. It is something. When performing this combination, as shown in Fig. 1, the upper mold holder 1 is turned upside down at another location, the springs 3 are inserted into the spring seats 2, and the presser 4 is placed upside down on top of the springs 3. After placing the upper die holder 1, the presser 4 is drawn to the upper die holder 1 by a bolt 5 passing through the upper die holder 1 and the presser 4, and the side pin 6 is passed through the upper die holder 1 with the spring 3 being compressed. After inserting the presser 4 into the concave groove 7 formed on the outer surface and assembling it to hold it in a predetermined position, the upper die holder 1 is turned over and returned to its original vertical position. A method is used in which the mold is transferred onto the lower mold 8 and placed thereon, and the pressing ram 9 is fixed to the upper mold holder 1 as shown in FIG. However, in such a method, the above-mentioned assembly is performed by first inverting the upper die holder 1 at another location, and then inverting it and transferring it onto the lower die 8, which is extremely time-consuming. The work is highly dangerous because the work is performed below the presser 1, and it requires a lot of man-hours to pull the presser 1 with the bolts 5, etc., and when the spring 3 needs to be replaced,
There is a hassle such as having to remove the presser 4 and reassemble it again. In this figure, 10
is a positioning pin of the upper die holder 1, and A is a workpiece to be molded.

Therefore, the present invention improves the mold structure of this press mold, thereby eliminating the need for reversing the upper mold holder, etc. as described above, and making it easy to replace the spring. It is designed to be carried out safely and quickly.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 3 and 4, in a press mold consisting of an upper mold holder 1 fixed to a ram 9 and a presser 4 supported slidably in the vertical direction by the upper mold holder, the presser 4
Upper mold holder 1 at a position opposite to the upper surface of
A plurality of through holes 11 are provided in the presser 4, and guide pins 12 are provided upright on the upper surface of the presser 4 at positions opposite to the through holes 11. It is designed to be inserted through.

In order to assemble the upper mold holder 1 and the presser 4 to form a press mold according to the present invention configured as described above, the presser 4 is placed on a jig stand (not shown) as shown in FIG. After placing the upper die holder 1 on the presser 4 and inserting the springs 13 into each guide pin 12 on the upper surface of the presser 4, the presser 4 is transferred onto the lower die 8 as shown in FIG. 9 is lowered, and with each spring 13 compressed, the side pin 6 is inserted from the upper die holder 1 into the groove 7 of the presser 4, and the presser 4 is supported by the upper die holder 1 so as to be movable up and down. The holder 1 and the ram 9 are integrally connected by bolts or the like.

In order to trim the workpiece A using this press mold, the workpiece A is placed on a predetermined position on the lower mold 8, and the press mold is lowered by the ram 9. The upper mold holder 1 comes into contact with the workpiece A, and further descends along the groove 7 via the side pin 6, compresses the spring 13, and directly presses the presser 4 to trim the workpiece A into a predetermined shape. .

Note that the present invention is not limited to the processing method as in the above-mentioned embodiment. For example, as shown in FIG. A cam mechanism is provided, consisting of a cam 15 that is pushed to the left and a push-up piece 16 that is pushed upward by the cam 15, and when the upper mold holder 1 is lowered, the push-up piece 16 pushes the flange of the workpiece A. It is also possible to bend and form part A' at the same time, and as shown in FIG.
The upper mold holder 1 and the lower mold 8
It is also possible to drill a hole in the flange A' of the presser 4, and instead of the side pin 6 passing through the upper die holder 1, a protrusion that fits into the groove 7 of the presser 4 is provided on the inner surface of the upper die holder 1. Furthermore, a recess for a spring seat may be formed in place of the guide pin 12 on the upper surface of the presser 4, and the spring 13 may be held by this recess.

As explained above, the present invention provides a through hole for the spring in the upper mold holder, and inserts a spring that passes through this through hole between the upper surface of the presser and the ram. This spring is compressed by the presser, and the presser is further pressed downward via the upper die holder, so when disassembling and assembling the press die, it is possible to remove the press once removed from the press like in the conventional structure. This eliminates the hassle of assembling the mold upside down and then returning it to its original direction and moving it onto the lower mold, making this work extremely easy and reducing time and man-hours. There is less danger as there is no need to work under the tool, and when replacing the spring, there is no need to disassemble the press mold each time as in the past, and you can simply separate the ram and upper mold holder, making the work easier. It also becomes easier.

[Brief explanation of drawings]

Figures 1 and 2 show a press mold with a conventional structure, Figure 1 is a cross-sectional view of this inverted state, Figure 2 is a cross-sectional view of this when it is installed in a press machine,
3 and 4 are cross-sectional views of an embodiment of the press mold according to the present invention, and FIG. 3 shows the state before the ram is connected;
Figure 4 shows the state installed in the press machine, and the 5th
6 are sectional views showing other embodiments of the press mold. A... Work material, 1... Upper mold holder, 4...
Presser, 9...Ram, 11...Through hole, 13
……spring.

Claims (1)

[Scope of utility model registration request] A press die that is fixed to a ram and moves up and down together with the ram to perform pressing work includes a pressing member having a pressing surface on the lower surface for pressing the workpiece, and a pressing member attached to the ram that moves the pressing member in the vertical direction. a support member that is slidably supported and has a through hole that penetrates in the vertical direction at a position facing the upper surface of the pressing member;
A press mold structure characterized in that a spring is provided passing through the through hole of the support member and compressed by the ram and the pressing member.