JPS6397321A - Die set with knock-out device - Google Patents

Abstract

PURPOSE:To obtain a press machine with a knock-out device by incorporating the knock-out device into a die set interlocking with a movement of the punch to operate and only adapting to a general press machine. CONSTITUTION:In case of press forming a work by working the punch 13 together with the die 12, a thrust bolt 21 is descended interlocking with descending the punch 13 and with this action, the thrust action of the knock-out pin 24 is released. After forming is finished, a press-slide is turned back to the top dead center and the punch 13 is ascended. Interlocking this ascending action of the punch 13, the thrust bolt 21 is ascended also and to thrust up the knock- out pin 24 with the bolt head 22, a formed product W' is thrust up by the knock-out pin 24 and taken out from the die 12. Furthermore, when the slide of the press machine is turned back at the top dead center position, the thrust bolt 21 is at the ascending position to thrust up the knock-out pin 24 and the fed work is set on the top 24 of the knock-out pin 24.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a die set that is used by being detachably attached to a press machine.

2. Description of the Related Art When a die set consisting of a combination of a die and a punch facing each other is attached to a press machine for heading molding, a knockout device is required to take out the molded product from the die.

Conventionally, such knockout devices are usually assembled into the main body of a press machine and operated by hydraulic or other driving means. For example, in the conventional example shown in FIGS. 4 to 6, a knockout pin 2 is installed so as to pass through a main body table 1 of a press machine so as to be movable up and down, and the knockout pin 2 is installed under a hydraulic pressure system located below the main body table 1. It is designed to be moved up and down by a cylinder 3, and is attached to the main body table 1. [The product 8 formed by forging with the die 5 and punch 6 of the buta die set 4 is pushed up with the knockout pin 2 as shown in Fig. 6. It is designed to take it out from the die 5. 7 in the figure indicates a workpiece.

Problems to be Solved by the Invention However, if the knockout device is built into the press machine body as described above, not only will the entire device become larger, but it will also need to be dedicated to a knockout equipped and rotating press machine, so it cannot be used with a normal press machine. The problem was that the versatility of the system was lost.

The present invention has been made in view of the above circumstances, and includes a knockout device incorporated into a die set including a die and a punch that face each other vertically, and the knockout device operates in conjunction with the movement of the punch of the die set. The purpose of the present invention is to provide a die set with a knockout device that can be attached to a general-purpose press machine in the same way as an ordinary die set by having the above structure.

Means for Solving the Problems In order to achieve the above object, the present invention has a structure in which a press has a guide bush fixedly erected on a die holder fixed to a table which is detachably attached to the machine body, and the guide bush 1 up and down! A guide post that is movably inserted extends upwardly through a through hole provided in the table, a punch holder is connected and fixed to the upper end of the guide post, and the lower end of the guide post that extends downwardly of the table is attached to the guide post. A knockout pin actuating means is provided that is movable up and down through the table, the die holder, and the die attached to the holder, and is interlocked with the up and down movement of the punch holder and therefore the punch attached to the punch holder. Accordingly, the knocker 1-pin is activated.

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings of FIGS. 1 to 3.

Reference numeral 10 denotes a table that is detachably attached to the press machine main body (not shown), and a die set 11 is attached to the table 10.
is assembled, and the die set 11 is removably attached to the press machine body together with the table 10.

The die set 11 includes a die 12 and a punch 13 facing each other vertically.
Two guide bushes 15 are fixed and erected on a die holder 14 to which the die 12 is attached, and the upper ends of two guide posts 17 are connected and fixed to a punch holder 16 to which the punch 13 is attached. The die holder 14 is fixed to the table 10, while the guide post 17 is slidably inserted into the guide bush 15 and extends downward through a through hole 18 provided in the table 10.

20 is the mounting plate of the knockout device, and the guide post 17
．． A push-up bolt 21 that pushes up a knockout pin 24 is connected and fixed to the lower end of the mounting plate 20 . The height of the head 22 of the push-up bolt 21 can be adjusted by adjusting the screwing depth into the mounting plate 20. 23 is secured with a locking nut.

Knockout punch 24 includes table 10 and die holder 1
4 and the die 12 so as to be vertically slidable and protruding from the intermediate portion, the range of vertical movement is limited to the space in which the collar 25 provided on the table 10 is fitted. In the raised position, the top portion 24a slightly protrudes from the upper end of the molding recess 12a of the die 12, and in the processing position, the top portion 24a is almost flush with the bottom surface of the molding recess 12a. Designed to sit on top.

Next, the operation of the die set with a knockout device having the above configuration will be explained.

FIG. 1 shows a state before the start of work in which a slide (not shown) of the press machine that interlocks and connects the punch holder 16 is located at the top dead center. At this time, the punch 13 and the guide post 17 are in the raised position, and therefore the push-up bolt 21 interlocked therewith is also in the raised position, and the workpiece W is placed on the top 24 of the knockout punch pin 24.

FIG. 2 shows a state in which the punch 13 is lowered under pressure by the press slide, solidifies with the die 12, and forms the workpiece W by forging. In conjunction with the lowering of the punch 13, the push-up bochelt 21 also descends, and the push-up action of the knockout pin 24 by the bolt 21 is released. Therefore, no extra pressure is applied to the punch 13.

FIG. 3 shows a state in which the press slide returns to the top dead center and the punch 13 is raised after the forming process is completed. In conjunction with the upward movement of the punch 13, the push-up bolt 21 also rises, and the head 22 pushes up the knockout pin 24, so that the molded product W' is pushed up by the knockout pin 24 and taken out from the die 12. Thereafter, the same operation as above is repeated.

Effects of the Invention Since the die set of the present invention has the above-described configuration, a press equipped with a knockout device can be completed by simply attaching a general-purpose press to a machine.

Moreover, since the knockout device is a separate side that operates in conjunction with the vertical movement of the Guiset punch, it does not require any special drive means and is convenient for use and handling.
It is also easy to manufacture.

[Brief explanation of the drawing]

Figures 1 to 3 are longitudinal sectional front views of essential parts showing the operating procedure of the die set with a knockout device according to the present invention, and Figures 4 to 6 are longitudinal sectional front views of essential parts showing the operating procedure of the conventional device. .

Claims (2)

[Claims] (1) A guide bush is fixed and erected on a die holder fixed to a table, and a guide post that is vertically slidably inserted into the guide bush extends upward through a through hole provided in the table, and the guide post A punch holder is connected and fixed to the upper end, and a lower end of the guide post extending downward of the table,
Actuation means for a knockout pin is provided that is movable up and down through the table, the die holder, and the die attached to the holder, and is interlocked with the up and down movement of the punch holder and therefore the punch attached to the punch holder. A die set with a knockout device, characterized in that the knockout pin is activated. (2) The knockout according to claim 1, wherein the actuation means for the knockout pin is constituted by a mounting plate connected and fixed to the lower end of the guide post, and a push-up bolt screwed onto the mounting plate. Die set with device.