JPH032329Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a press mold equipped with a pressing mechanism that increases the lateral pressure of the pad that presses down the panel work when performing flange forming etc. by the lateral movement of the cam. .

[Conventional technology]

As a conventional press mold, for example, JP-A-57-
There is one as shown in Publication No. 171527. As shown in Fig. 5, this is a vertical wall portion Wb that is relatively perpendicular to the panel work W on which the flange Wa is formed.
This is used when the upper pad alone cannot hold down the panel work W due to insufficient lateral pressure. In the figure, 1 is a punch attached to the lower die 2, 3 is a slide cam equipped with a sectional die 4 that works with the punch 1 to form a flange Wa on the vertical wall Wb of the panel work W, and 5 is this slide cam. 3 is a drive cam attached to the upper mold to drive it forward; 6 is a pad which is also attached to the upper mold and is formed to press the upper surface Wc of the workpiece and the side surface with the vertical wall portion Wb; 7 is this pad 6 In order to press against the side part 6a of the
This is a pressing mechanism for increasing pad side pressure, which is further slidably placed on the slide cam 3.

When the upper mold is lowered, the pad 6 presses the panel work W on the punch 1, and at the same time the drive cam 5 advances the slide cam 3. During the advancement, the slider provided at the tip of the pressing mechanism 7 7a
The front surface of the pad 6 contacts the side 6a of the pad 6. Thereafter, the elastic body 7b is compressed, and its elastic force presses the side 6a of the pad 1. This pressing completely prevents the side part 6a of the pad 6 from opening outward and the vertical wall part Wb of the panel work W from lifting up, and the punch 1 and the sectional die 4 can stably perform the flange forming process with high precision. It will be done.

[Problem that the invention attempts to solve]

In the case of a conventional press die in which a pressing mechanism 7 is further slidably mounted on a slide cam 3 having a sectional die 4, the flange to be formed is
It is extremely effective for structures where the forming direction of Wa slopes downward from the vertical wall Wb, but on the contrary,
In the case of a structure in which flange forming is performed so as to form an upward slope from the vertical wall portion Wb, the holding of the panel work W by the pad 6 is not reinforced, but rather is hindered. That is, as shown in FIG. 6, the slide cam 3 and the pressing mechanism 7 are disposed so that the direction of movement thereof is an upward slope in accordance with the forming direction of the flange Wa. The force P1 applied to and the original pad pressure P
The pads 6 tend to compete with each other, causing the pads 6 to rise.

This idea was made to improve this problem, and by having a slide cam inside the upper mold pad to increase pad pressure, it can also be used for press working on an upward slope on the vertical wall of a panel work. The purpose is to provide an extremely effective press mold.

[Means for solving problems]

This invention, which achieves the above objectives, consists of a punch that is attached to the lower mold and can set a panel work having a vertical wall, and a processing drive cam that is installed on the side of this punch and attached to the upper mold. A processing slide cam equipped with a tool that is driven and moves forward and performs press processing on the vertical wall of the panel work in cooperation with a punch, an upper surface portion that presses the top surface of the workpiece attached to the upper die, and the processing of the workpiece a pad that is integrally formed with a side portion that presses a vertical wall portion in the vicinity of the area to be padded; a slide cam for reinforcing pad pressure that is supported in a horizontally slidable manner within the pad and presses the side portion of the pad; This press type is characterized by being provided with a pad pressure increasing drive cam attached to the upper holder to drive the slide cam in the forward direction.

[Effect]

The upper mold descends and the pad presses the panel work on the punch, and then the processing slide cam is driven forward by the processing drive cam.

On the way before that, the pad pressure increasing drive cam drives the pad pressure increasing slide cam forward in the lateral direction to apply lateral pressure to the side of the pad. As a result, the pad sufficiently presses not only the top surface of the panel work but also the vertical wall, so even if pressing is performed on an upward slope on the vertical wall of the panel work, it can be performed stably and with high precision. Ru.

An embodiment of this invention will be described below based on the drawings.

FIG. 1 is a longitudinal sectional side view of the main parts of the press die for flange forming, FIG. 2 is a plan view of the upper die, and FIG. 3 is a longitudinal sectional front view of the upper die shown in the direction of the - arrow in FIG. In each figure, 11 is a punch which is attached to the lower holder 12 and can set a panel work W having a vertical wall Wb, and the flange portion Wa is formed to form an upward slope from the vertical wall portion Wb. 1
Reference numeral 3 designates a processing slide cam disposed diagonally below the side of this punch 11, and is slidably attached to the slope of the lower holder 12, and is attached to the tip of the punch in the upward slope direction. A die 14 is used as a tool for machining, for example, a flange Wa of an upward slope on the vertical wall Wb of the panel work W in cooperation with the die 11.
It is equipped with 15 is this processed slide cam 13
16 is a stopper for regulating the backward position. 17 is a processing drive cam attached to the upper holder 18 to drive the processing slide cam 13 forward; 19 is also attached to the upper holder 18; an upper surface portion 19a that presses the upper surface Wc of the workpiece;
A pad 20 is integrally formed with a side portion 19b that presses a side surface of the vertical wall portion Wb.
21 is a guide pin that supports this elastic body 20, and 22 is a keeper for locking and holding the pad 19 on the upper holder 18 (FIG. 2). It is a plate.

The above-mentioned pad 19 has, unlike the conventional one,
A recess 19c is formed facing the side portion 19b, and a slide cam 23 for increasing pad side pressure is housed in the recess 19c so as to be movable in the lateral direction orthogonal to the downward direction of the upper holder 18. There is.
24 is a side block fixed to both sides of the pad 19 to slidably support the slide cam 23, and 25 is a gib block 2 fixed to the center of the pad 19 to support the slide cam 23.
It is a give plate fixed through 6. 27
are a plurality of elastic bodies inserted between the front surface of the slide cam 23 for increasing the pad side pressure and the side part 19b of the pad 19, and are made of, for example, urethane rubber or a coil spring. are distributed evenly over the entire length of the Reference numeral 28 denotes a drive cam for increasing the pressure on the pad side for driving the slide cam 23 forward, and in this embodiment, it is attached to the upper holder 18 at two separate locations. Reference numeral 29 denotes an inclined sliding surface on which the slide cam 23 for increasing pad side pressure and the drive cam 28 come into contact.

Figure 4 shows the state before cam flange processing,
The pad 19 is in contact with the panel work W on which the vertical wall portion Wb has been formed in the previous step and placed on the punch 11. As the upper holder 18 further descends from this state, the pad elastic body 20 is compressed, and pad pressure based on the elastic force is applied to the workpiece W. During the pressurization process by the pad 19, the drive cam 28 attached to the upper holder 18 for increasing pad side pressure and the slide cam 2 for increasing pad side pressure installed inside the pad 19
3 abut on the inclined sliding surface 29.

Thereafter, as the drive cam 28 descends (arrow mark A), the slide cam 23 moves forward (arrow mark B).
As a result, the elastic body 27 is compressed, and its elastic force is applied to the side portion 19b of the pad 19. As a result, the pad side pressure against the panel work vertical wall portion Wb is effectively increased, and lifting of the work W is completely prevented. Subsequently, the processing slide cam 13 moves forward in an upward slope in conjunction with the lowering of the processing drive cam 17, and the flange portion Wa is processed by the die 14 (see FIG. 1). Once this processing is complete,
The upper holder 18 rises, the processing slide cam 13 and the pad side pressure enhancing slide cam 23 move back with elastic restoring force, the mold is opened, and the cycle ends.

In the above embodiment, a flange molding die equipped with a sectional die 14 as a processing tool has been described, but the present invention can be similarly applied to a press die equipped with other processing tools such as a piercing punch. Furthermore, the technical idea of the present invention is not applied only to the case where an upwardly sloped flange is formed on a vertical wall of a workpiece.

[Effect of idea]

As explained above, according to this idea,
By installing a compact slide cam for increasing pad lateral pressure inside the pad supported by the upper holder, it is possible to reliably increase the pad pressure from the lateral direction against the vertical wall of the panel work. Even when press working on a wall part on an upward slope, extremely stable and highly accurate working can be guaranteed.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view of a main part of an embodiment of this invention, FIG. 2 is a plan view of a main part of an upper mold, FIG. The figure is a longitudinal sectional side view of the main part explaining the operation of this embodiment, FIG. 5 is a longitudinal sectional side view of the main part showing an example of a conventional press mold,
FIG. 6 is a sectional view illustrating problems in the conventional example. 11...Punch, 12...Lower holder, 13...
Processing slide cam, 14...Die (tool), 17
...Processing cam driver, 18...Upper holder, 1
9...Pad, 19a...Top surface of pad, 19
b... Side part of the pad, 23... Slide cam (for increasing pad side pressure), 28... Drive cam (for increasing pad side pressure).

Claims (1)

[Scope of utility model registration request] A punch that is attached to the lower die and can set a panel work having a vertical wall, and a punch that is disposed on the side of this punch and moves forward driven by a processing drive cam attached to the upper die, and cooperates with the punch. a processing slide cam equipped with a tool that performs press processing on the vertical wall of the panel work by pressing the workpiece; A pad integrally formed with a side part, a pad pressure-increasing slide cam that is supported in the pad so as to be slidable laterally and presses the side part of the pad, and a pad pressure increasing slide cam for driving the slide cam in the forward direction. A press type characterized by being equipped with a drive cam for increasing pad pressure attached to the upper holder.