JPH0327821A - Pressing die - Google Patents

Abstract

PURPOSE:To sufficiently increase the force to hold the material to be worked by freely setting the ratio of the force holding the material to be worked and the punching force and the incline surface of a cam driver and slide member. CONSTITUTION:When the driving member 14 is driven along the axial line L2 to the lower direction, the upper die 23 approaches the lower die 24, the stripper 15 is abutted to the material to be worked 22. When the driving member 14 is driven more, the 1st incline surface 13a of the cam driver 13 is abutted to the 2nd incline surface 18a of the slide member 18. Because the 3rd incline surface 18b of the slide member 18 is abutted to the 4th incline surface 19a of the punch 19, the driving force of the driving member 14 is worked through the cam driver 13 to the slide member 18. The material to be worked 22 is held to the die 11 with component force G by the stripper 15, pressed with component force N by the punch 19 and punched. Therefore the force to hold the material to be worked is sufficiently increased without making the die large size.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a press mold, and more particularly to a press mold that presses a workpiece while holding it down with a stripper.

(Prior Art) As a conventional press mold of this type, one shown in FIG. 3 is known. ing.

In FIG. 3, when the punch holder 1 is approached along the die 3 axis 'alt supported by the die holder 2, the spring disposed between the punch holder 1 and the strip holder 4 first appears. 5 is compressed and the workpiece 6 is pressed against the die 3 by the biasing force of the spring 5, and then the workpiece 6 is pressed against the punch 7 supported by the punch hole holder l.
It is designed to be punched out.

The stripper bolt 8 supports the stripper 4, and the punch plate 9 supports the punch 7 on the punch holder l.

(Problem to be Solved by the Invention) However, in such a conventional press die, since the workpiece 6 is held down by the biasing force of the spring 5, it is difficult to hold down the workpiece 6. When a large amount of force is required, there are problems in that the mold becomes large or cannot handle it, and there are also problems in that maintenance becomes difficult.

That is, when a large force is required to press down the workpiece 6, a large number of springs 5 must be disposed between the punch holder 1 and the stripper 4, resulting in an increase in the size of the mold. In particular, when a very large force is required for pressing, the urging force of the spring 5 is such that even if a large number of springs 5 are disposed, the force that brings the punch holder l closer to the die holder 2 is only 1.
Since it was less than 5%, it was not possible to deal with such cases.

In addition, due to changes in the characteristics of the spring 5 over time, the workpiece 6
Since the pressing force changes, it is necessary to frequently replace the spring 5, making maintenance difficult.

(Purpose of the Invention) Therefore, the present invention has been developed by making it possible to freely set the ratio between the force for pressing the workpiece and the force for punching the workpiece without using the biasing force of a spring, thereby making it possible to make large molds. The purpose of this invention is to be able to sufficiently increase the force for pressing the workpiece without causing the workpiece to deteriorate, and to facilitate the maintenance of the mold.

(Construction of the Invention) In order to achieve the above-mentioned object, a press mold according to the present invention approaches and separates from the die relatively along a predetermined axis, faces the die, and is inclined with respect to the predetermined axis. a cam driver having a first slanted surface, a stripper provided between the die and the cam driver; a slide member having a second inclined surface abutting the surface and a third inclined surface facing the die and inclined with respect to the predetermined axis at the other end; and a stripper movable along the predetermined axis. a punch that is slidably supported and has a fourth inclined surface that abuts the third inclined surface.

Hereinafter, the present invention will be specifically explained based on examples.

1 and 2 are diagrams showing an embodiment of a press mold according to the present invention.

First, the structure will be explained.

In FIG. 12, 1l is a die, and the die l1 is supported by a die holder l2. l3 is a drive member l driven in the axis L2 direction by a press drive unit (not shown).
A cam driver supported by 4, cam driver l3
The die 11 is moved along the axis L by driving the driving member l4.
be relatively close to and separated from each other.

The cam driver l3 has a first inclined surface 13 facing the die l1.
a, and the l-th inclined surface 13a is inclined at an angle α{ with respect to the axis L2. A stripper 15 is provided between the die 11 and the cam driver 13.
is supported by the drive member l4 by the bolt I-16.
The stripper l5 has a slide head 15a,
The slide base 15a slidably supports the slide member l8. The slide member 18 slides on the slide member 18 so as to move in a direction perpendicular to the axis L2, and has a second inclined surface 18a at one end that abuts the first inclined surface 13a. Further, the slide member 18 has a third inclined surface 18b facing the die 11 at the other end, and a third (1i inclined surface 18
b is inclined at an angle β with respect to the axis L2. 19 is a punch that is slidably supported by the stripper 15, and the punch 19 slides so as to move along the axis L2, and the third (
It has a fourth inclined surface 19a that comes into contact with the lJi inclined surface 18b. Also, Punch 19 is Punch 19 and Strisova 1.
5 receives an upward biasing force along the axis vALz as shown in FIGS. 1 and 2. Reference numeral 2l denotes a bank amplifier plate supported by the stripper 15, and the bank amplifier plate 21 restricts displacement of the cam driver l3 in the direction of arrow A in FIG. A workpiece 22 is placed between the striso bar 15 and the die 1l.
is arranged so that the first
An upper mold 23 is constructed by the members on the upper side of the figure, and a lower mold 24 is constructed by the members on the lower side in FIG. 1 by means of the workpiece 22. That is, the drive member 14, the cam driver 13,
Slide member l8, punch l9, stripper l5, spring 20, bank amplifier plate 21 and bolt I-
16 constitutes an upper mold 23, and the die 11 and die holder l2 constitute a lower mold 24.

Next, the effect will be explained.

First, when the drive member l4 is driven downward in FIGS. 1 and 2 along the axis L2, the upper mold 23 approaches the lower mold 24, and the stripper 15 moves toward the workpiece 22 as shown in FIG. comes into contact with. Next, when the drive member l4 is further driven in the same direction, at this time the lth (lJ? slope 1 of the cam driver l3
3a is in contact with the second inclined surface l8a of the slide member 18, and the third inclined surface 18b of the slide member 18 is in contact with the fourth inclined surface 19a of the punch l9. The driving force of the drive member 14 is applied to the slide member 18 via the cam driver 13. The force applied to the slide member l8 is divided into a vertical component G and a horizontal component F in FIG. Pressed by force G, i.e.
The workpiece 22 is pressed against the die U by the strisopar I5 with a component force G. Further, a force is applied to the punch l9 from the slide member 1B by a component force F, and the force applied to the punch 19 is a component force N in the vertical direction in FIG. 2 corresponding to the size of the angle β.
Since the component force M is distributed in the horizontal direction, the workpiece 22 is pressed by the punch 19 with the component force N against the biasing force of the spring 20, and is punched out. On the other hand, the component force M is canceled by the reaction force from the strisopar 15.

As described above, in this embodiment, the force for pressing the workpiece 22 and the machining force for punching the workpiece 22 are proportional to the magnitude of the reaction force that the punch 19 receives from the workpiece 22, and Since the ratio between the two can be freely set by combining the angles α and β, it is possible to make the pressing force larger than that required for punching, for example. Therefore, the mold can be made smaller compared to the conventional mold which is provided with a large number of springs to increase the pressing force.

Furthermore, even when a very large pressing force is required, it can be adequately coped with, thereby preventing deformation of the workpiece 22.

On the other hand, since the force that presses down the workpiece 22 is not due to the biasing force of the spring, maintenance of the mold can be made easier compared to conventional molds that require replacement of springs due to aging.

(Effects) According to the present invention, the ratio between the force for pressing the workpiece and the force for punching the workpiece can be freely set without using the biasing force of the spring. The force for pressing the workpiece can be sufficiently increased without increasing the size. Furthermore, it is possible to eliminate the need to replace springs due to changes over time, and maintenance of the mold can be facilitated.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams showing an embodiment of the press mold according to the present invention, Figure 1 is a sectional view thereof, Figure 2 is an enlarged sectional view of the main part thereof, and Figure 3 is a conventional press mold. FIG. U... Die, 13... Cam driver, 13a... Lth inclined surface, 15... Stripper, l8... Slide member, 18a...Second slope, 18b...Third slope, 19...Punch, 19a...Fourth {Ill slope. Agent: Patent Attorney Gunro Ariga No. 1 Figure 2 Figure 3

Claims (1)

[Claims] a cam driver provided between the die and the cam driver, the cam driver having a first inclined surface that is relatively close to and separated from the die along a predetermined axis, faces the die, and is inclined with respect to the predetermined axis; a stripper which is slidably supported by the stripper so as to be movable in a direction perpendicular to the predetermined axis, has a second inclined surface abutting the first inclined surface at one end, and has a second inclined surface opposed to the die at the other end. a slide member having a third inclined surface inclined with respect to the predetermined axis; and a fourth inclined surface slidably supported by the stripper so as to be movable along the predetermined axis and abutting the third inclined surface. A press mold characterized by comprising: a punch having a punch;