JPS58138527A - Press die - Google Patents

Abstract

PURPOSE:To obtain a press die which is capable of executing flange-working and piercing-working by one process with high accuracy, by providing a forming die, a piercing punch to which said die has been fitted, and a piercing subsliding cam for operating this punch. CONSTITUTION:A work W is placed on a punch 1, and after that, an upper holder 20 is lowered and the work W is pressed by a pad 21. On the other hand, a forming driving cam 18 and a piercing subdriving cam 19, which have been fitted to the holder 20 are lowered an inclined face 18a of the cam 18 is made to abut to an inclined face 5a of a forming sliding cam 5, and it is made to move forward in the direction of the punch 1 on a lower holder 2. Subsequently, as the cam 18 is lowered, a flange part Wa of the work W is formed by a forming die 4, a flange forming part 4a and a flange forming part 1a of the punch 1. Also, as the upper holder 20 is lowered, an inclined face 19a of the cam 19 is made to abut to an inclined face 7a of a subsliding cam 7, the cam 7 is advanced in the direction of the work W, the flange Wa is pierced by extruding a piercing punch 6, and both workings of forming and piercing are ended.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press mold for performing molding and drilling with one mold.

Conventionally, in order to form a flange on the end Wa of a workpiece W as shown in FIG. 1, and to make a hole in the formed flange, two steps were carried out using a 7-lunge forming die and a hole-making die. However, there is a problem that the number of molds and processes increase.

This invention was made with attention to the problems of the conventional art, and therefore a punch for making a large hole is inserted through a molding die and a molding slide cam on which the molding die is mounted.
The purpose of the present invention is to solve the above-mentioned problems by making the hole-drilling punch a press type equipped with a sub-sliding cam for hole-drilling to improve its operation.

The present invention will be explained below based on the drawings.

1 to 4 are diagrams showing an embodiment of the present invention. First, the configuration will be described. Reference numeral 1 denotes a punch fixed to a lower holder 2, which has a flange forming portion 1a, and a button die 3 for punching a hole in the workpiece W is attached thereto. A molding die 4 is attached to a molding slide cam 5 that reciprocates laterally on the lower holder 2, and is provided with a flange molding portion 4a.

6 is fixed by screwing one end to a slide cam 7 for drilling that slides inside the slide cam 5 for molding.

It is a rod with a hole punch 8 attached to the other end that cooperates with the button die 3 to form a hole. 9.10 are return springs interposed between the molding die 4 and the rod 6 and between the molding slide cam 5 and the sub-slide cam 1, respectively, in order to move the rod 6 and the thin slide cam 7 back; Reference numeral 11 denotes a stopper that is attached to the molding slide cam 5 in order to regulate the backward movement position of the JIILJ slide cam 7.

The 12I11 receiver is a rod fixed to the lower holder 2 via metal fittings 13 and 14, and the receiver is interposed between the metal fitting 13 and the cam stopper 15 attached to the slide cam 5 for forming. A return spring 16 is inserted.

Reference numeral 11 denotes a stopper for regulating the backward movement position of the molding slide cam 5. 18 is a molding drive cam that engages with the molding slide cam 5; 19 is a sub-drive cam for drilling that engages with the sword slide cam 7; and 20 is an upper holder to which the drive cams 18 and 19 are fixed. Melt.

A pad 21 presses and fixes the work W onto the punch L, and is attached to the upper holder 20 via an elastic member (not shown).

Next, the action will be explained.

After placing the workpiece W on the punch 1, when the press is activated, the upper holder 20 descends, and the pad 21 presses the workpiece W, while the forming drive cam 18 attached to the upper holder 20 and the hole punching The sub-drive cam 19 also descends, but since the lengths of the two are different, as shown in tel., first the oblique 1fl18a of the forming drive cam 18 comes into contact with the inclined surface 5a of the forming slide cam 5, and the forming The slide cam 5 is moved forward on the lower holder 2 toward the punch 1 against the elasticity of the return spring 16.

As the forming drive cam 18 continues to descend, the flange portion Wa of the workpiece W is formed by the flange forming portion 4a of the forming die 4 and the flange forming portion 1a of the punch 1, as shown in FIG. , just before the end of molding, the vertical surface of the molding slide cam 5 becomes t-forming drive cam 18.
Since it comes into contact with the vertical surface 18b of , it does not advance any further.

When the upper holder 20 further descends, the slant de19a of the sub drive cam 19 comes into contact with the slope 7a of the sub slide cam 7, causing the sub slide cam 1 to move to the return spring 1.
Therefore, the rod 6 pushes out the hole punch 8 against the elasticity of the return spring 90 to make a hole in the flange portion Wa just before completion of forming. At the same time, the needle surface 18c of the forming drive cam 18 finally presses the forming slide and cam 5 to complete the flange forming of the workpiece W. Therefore, as shown in FIG. Complete the meat processing of holes.

Next, when the upper holder 20 rises after machining is completed, the drive cam 19 for drilling also rises, so the sub slide cam 7
is pushed back by the return spring 9.10, so that the punch 8 is returned into the forming die 4, but at this point the forming slide cam 5 is pushed back against the vertical surface 18b of the forming drive cam 8. Since the retraction is temporarily stopped while the forming die 4 is in contact with the workpiece W, the forming die 4 does not separate from the work W earlier than the hole punch 8, as shown in FIG. Since the drive cam 18 for the cylindrical shape also rises, the slide cam 5 for the cylindrical shape is retreated by the return spring 16 until it comes into contact with the stopper 17, and returns to its original position.

With this, one cycle of machining is completed.

As described above, according to the present invention, the configuration includes a punch having a flange forming part and on which a work is placed;
In the press mold, the slide force foot is fixed to the press upper mold and has a drive cam that engages with the slide cam. A punch for drilling is slidably fitted into a through hole provided in the slide cam, and a button die is provided on the punch for drilling a hole in the workpiece in cooperation with the punch for removing wrinkles. Slide the 11 slide cam connected to the work box/chi onto the slide cam.
■Since the drive cam that engages with the sub-slide cam is fixed to the press upper die separately from the drive cam, flange processing and hole drilling can be done in one process, and problems such as deformation of the machined hole can be avoided. The effect is that processing can be performed without any interference.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a main part of an embodiment according to the present invention, Fig. 2F
i A view in the direction of arrow A in FIG. 1 and FIG. 3.4 are sectional views taken at part 111 for explaining the operation of this embodiment together with FIG. 1. 3...Button die 4...Forming die 4a...Flange forming section 5...Slide cam for forming 7...
..... Sub-slide cam 8 ..... Hole punch W ..... Work 1a ..... 7 Lunge forming part 18 ....・Drive cam 19... Drive cam pm

Claims (1)

[Scope of Claims] A punch having a flange forming member and on which a work is placed, and a slide cam including a forming part that cooperates with the flange forming part to form a flange of the work. Fill +
The Id slide cam is equipped with a button die in which a punch for making six holes is slidably fitted into the nine through holes, and a button die is used to punch holes in the workpiece in cooperation with the punch for making wire holes.
A mJ slide cam connected to the hole-drilling punch is provided on the slide cam, and a drive cam that engages with the sub-slide cam is attached to the press upper mold separately from the drive cam. A press type characterized by being fixed.