JPS61123428A - Metal die device - Google Patents

Abstract

PURPOSE:To make the positioning of a punch and die correct and to prevent the generation of a scuffing, etc. by incorporating an obliquely sliding punching tool into the upper die stripper and by providing the means to guide a stripper and die. CONSTITUTION:A press 4 is incorporated as a punching tool in the plate of upper die stripper 18. With the descent of the ram of the press the stripper 18 hits a stopper 12 and the descent of the stripper 18 is stopped. In this case the stripper 18 is guided by a guide pin 19 and descends with keeping its relative position with the lower side and the punching work is progressed. In this case because of the relative position of a punch 4 and die 8 being secured by the guide pin 19 being provided on the lower die a correct edge setting of the punch 4 and die 8 is enabled. Consequently no scuffing is caused on a product.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mold apparatus for punching a sloped surface of a product having a sloped surface.

Structure of the conventional example and its problems A conventional mold device for punching the slope of a product having a slope is shown in FIG. 1.
A slide 3 is guided by a slide guide 2 provided on a stripper plate (hereinafter referred to as a stripper plate), and a punching tool 4 (hereinafter referred to as a punch) provided at the tip of the slide 3 is guided by a slide guide 2 provided on the stripper plate.
It was held by a punch holding plate 5. The stripper plate 1 was then guided by guide pins 7 provided from a fixed plate 6 above the stripper plate. When the upper slide ram of the press descends, the stripper 1 hits the stripper 12 above the lower die 11, and the position of the unit incorporated in the stripper 1 is determined. When the ram of the press further descends, the cam 9 on the fixed plate 6 pushes the pressing surface 10 of the slide 3, and the punch 4 enters the opposing die 8, completing the punching process. In the punching structure, punch 4 and die 8
However, in order to fit, the machining accuracy of the punch 4, the alignment accuracy between the punch 4 and the punch holding plate 5, and the holding plate 5 are required.
The alignment accuracy between the slide 3 and the slide 3, the gap between the slide 3 and the slide guide 2, the alignment accuracy between the slide guide 2 and the stripper 1, and the alignment accuracy between the stripper 1 and the fixed plate 6 as shown in FIG. Furthermore, it is necessary to accurately position the upper die set 13, the guide bush 14, the guide post 16, the lower die set 16, and the die 8 one after another.

When positioning is performed multiple times in this way, the overall positional accuracy deteriorates. Moreover, the upper mold die set 13 is
Since the punch 4 is fixed to the ram of the press, it is likely to be affected by the accuracy of the ram of the press, even though it is guided as described above. Due to these reasons, the punch 4 cannot secure a sufficiently accurate position with respect to the die 8, resulting in an overlap 17 between the punch 4 and the die 8 as shown in FIG. may occur.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention reconsiders the positioning and guiding method when punching the slope of a product having a slope, and makes it possible to accurately position the upper punch and the lower die. This provides a punching structure in which punching can be performed smoothly even when galling or the like is performed.

Structure of the Invention The present invention includes a punching tool that is incorporated in an upper die stripper and slides in an oblique direction, a stripper main body,
It consists of a die in the lower die and a guide pin installed in a part of the die to guide the stripper and die.Since the punch and die are guided at a close distance, the punch and die can be accurately aligned. It has the unique effect of not engaging the die and causing galling.

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

FIG. 4 shows the general structure of the first embodiment of the present invention. In FIG. 4, reference numeral 18 indicates a stripper plate guided by a guide pin 19 provided on the lower die, 19 indicates a guide pin provided on the lower die, and 2o indicates a workpiece.

The operation of the cam unit assembled in the stripper configured as described above will be explained below.

First, as the ram of the press descends, the stripper 18 hits the stopper 12 provided on the lower side, and the stripper 18 stops descending, and then the pressure generating device such as a spring that presses the stopper 18 is deflected. Become. At this time, since the stripper 18 is guided by the guide pin 19, it descends while maintaining its relative position with the lower side. As processing progresses further and the ram of the press descends, the punching process is completed in a process similar to that of the conventional example. However, in this embodiment, the relative position of the punch f4 and the die 8 is ensured by the guide pin 19 provided on the lower mold, so the blades of the punch 4 and the die 8 can be accurately aligned, as shown in FIG. It does not cause any kind of galling17.

In the example, the guide pin was supported by a flat bearing in the thrust direction as shown in Fig. 5, but it can also be supported by a bearing using a pole as shown in Fig. 6. You can get the effect.

Also, as shown in FIG. 7, the guide pin 21 is raised from the fixed plate 22 above, and the strisohar plate 23 and the die 24 are guided by the same pin, or
As shown in the figure, the guide pin 2 is attached to the stripper plate 25.
It goes without saying that the same effect can be obtained by setting up the die 7 and guiding it with the die 2e.

Effects of the Invention As described above, the present invention provides a guide pin that indicates the relative position of the stripper and the die, thereby making it possible to precisely align the punch built into the stripper with the die of the lower die. There is a practical effect called a dog.

[Brief explanation of the drawings] Figure 1 is a partial sectional view of a conventional mold device with a built-in I7 sopar, Figure 2 is a sectional view of the same mold device with a die, and Figure 3 is a cross section of the die. 4 is a cross-sectional view of a mold device in one embodiment of the present invention, FIG. 6 is a cross-sectional view of a guide pin, FIG. 6 is a cross-sectional view of a guide pin in another embodiment, FIG. FIG. 8 is a sectional view of the plate on which the guide pin is erected. 11...Die, 18...Stripper, 19...Guide pin. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 rA B tb Figure 5 Figure 6 Figure 7 f22 Figure 8

Claims (1)

[Claims] A mold device for punching a press mold, which is installed on a part of the vertically movable plate of the upper mold.
A punching tool that reciprocates diagonally as the mold moves up and down, a lower die that faces the punching tool, and a vertically movable plate that is installed in a part of the lower die and guides it. A mold device equipped with a guide mechanism.