JPH01215415A - Die assembly for punch press - Google Patents

Abstract

PURPOSE:To improve efficiency without changing a die when two or more pressings are carried out on a stock by integrating a plurality of punch bodies into the punch holder of a die and moving a striker freely pushing down the punch holder. CONSTITUTION:The striker 46 is located in the prescribed upper direction of a plurality of punch bodies 26 installed on a die A. Then, when the striker 46 is lowered and a punch 26 under, the striker is pushed down, the punch body 26 falls and the stock 50 under the punch body is pressed at the lower end. After that, the striker 46 is lifted and the punch body 26, too, is lifted. The lifted striker 46 moves by the next command to the prescribed position to carry out pressing by the same operation.

Description

Detailed Description of the Invention (Industrial Field of Application) This invention involves installing a plurality of molds on a turret station or a station that moves in a straight line, and installing a striker on a striker select set that moves up and down at a fixed position. The present invention relates to a press device that performs pressing by pressing down a head on a punch body attached to the mold with a striker, and particularly to a mold thereof.

[Conventional technology]

The above-mentioned press machine controls the station and lifting members using numerical control rB (hereinafter referred to as NC control) and performs a certain processing on the workpiece according to pre-programmed steps, and is generally called an NC punch press device. There is.

FIG. 1θ shows a mold of a conventional NC punch press device.

In this figure, 1 is a turret station, and a cylindrical punch holder 2 is attached to this station 1.

5 is installed in the holder 2 so that it can be raised and lowered, and the head 4 is attached to the upper end.
A punch body 6 is fixed to the lower end of the driver, and the lower end of the driver is slidably fitted into an opening of a stripper plate 7 fixed to the lower end of the punch holder 2.

A plurality of disc springs 8 are attached between the holder 2 and the head 4 on the outer periphery of the driver 6, so that the holder 2 and the driver 5 are raised and lowered together via the disc springs 8.

Reference numeral 9 denotes a bolt fixed to the station 1, which is attached to the bolt 9 so as to be movable up and down, and a lid bush 10 is pushed up by a spring 12, so that a guide pin 11 fixed to the outer periphery of the punch holder 2 is brought into contact with the bush 10.

In the above-mentioned conventional technology, under the condition that the head 4 moves directly below the striker 13 and stops due to the intermittent movement of the turret station 1, the striker 13 moves downward and pressurizes the head 4.

As a result, the punch holder 2 descends together with the punch body 46 and the like, but at this time the pin 11 pushes down the bush 10 against the spring 12.

When the holder 2 and the like descend to a certain position, the stripper plate 7 hits the workpiece 14 and presses the workpiece 14 against the die 15 and stops, but the striker 13 continues to descend, so the disc spring 8 is compressed. The driver 5 and punch body 6 further descend to punch out the workpiece 14.

After that, the striker 13 is raised, the driver 5 and the punch body 6 are raised, and then the punch holder 2 and the stripper plate 7 are raised by the spring 12.

[Problem to be solved by the invention]

As mentioned above, in the conventional mold, one punch holder 2 has one die.
Since the punch body 6 has a structure in which two or more punch bodies 6 are mounted, the mold must be replaced each time when machining two or more different shapes or machining in different directions.

For this reason, there were problems such as it took time and effort to replace the mold, the time during which the machine was stopped was extended, and the operating rate decreased.

This invention has been developed in view of the problems of the prior art as described above.
An object of the present invention is to provide a punch press device equipped with a punch press mold capable of performing efficient press working by mounting two or more punch bodies on a single punch holder.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, the present invention attaches a plurality of molds to a moving station, and uses a striker provided above the station to strike the upper end of a punch body attached to the molds. In this press machine, a plurality of punch bodies are attached to the mold, and the striker is made movable so that the striker can be moved to any punch body of the mold. It can be moved upward to perform press working with any punch body.

[Effect]

Since the present invention has the above configuration, the striker moves above a predetermined one of the plurality of punch bodies attached to the mold and stops.

Next, when the striker descends and presses down the punch body at its lower part, this punch body descends and presses the workpiece below with its lower end.

After that, the striker rises and the punch body also rises.

The raised striker moves to a predetermined position in response to the next command and performs pressing with the same action as described above.

〔Example〕

FIG. 1 shows an NC punch press device for mounting a mold according to the present invention. A vertical shaft 19 is provided at the center of a frame 17 and is intermittently driven by a drive means 18, and a turntable 20 and a turret station are attached to this shaft 19. 21
to be fixed. A is a composite mold according to an embodiment of the present invention, and is attached to a plurality of vertical holes provided in the turret station 21.

Reference numeral 25 in FIGS. 4 and 5 is a punch holder for the composite mold A, and this holder 25 can be slid only upward, not downward, into the vertical hole of the station 21. , and is mounted in a state in which rotation is prevented by a key 22.

Further, punch bodies 26 and 27 are respectively attached to a plurality of vertical holes provided in this punch holder 25 so as to be able to rise and fall.

As shown in FIG. 6, the punch bodies 26 and 27 are flat and arranged in a T-shape, and their lower ends face openings in separate stripper plates 28 and 29, respectively.

The plate 28 is screwed to the lower ends of a pair of slide guides 30 mounted inside the holder 25 as shown in FIG. 5, and the plate 29 is screwed to the lower ends of a pair of slide guides 31 mounted inside the holder 25. has been done.

32.33 is a head assembly screwed onto each body 26.27, and a lifter plate 35.36 is fitted on the outside near the upper end of each head 32.33.

As shown in FIG. 5, a pair of stripper bushes 38 are loosely fitted into the lifter plate 35, and the bushes 38 are fixed onto the guide 30 with bolts.

A large number of disc springs 3 are provided on the outside of the stripper bush 38.
9 is fitted, and a stopper 40 is attached to the upper end of the bush 38 to limit the upper limit of the lifter plate 35.

The relationship between the slide guide 31 and the lifter plate 36 is also the same as the relationship between the slide guide 30 and the lifter plate 35, but a detailed explanation will be omitted.

41 in Fig. 5 is a pair of bolts fixed to the station 21, and the lid bush 4 can be attached to this bolt so as to be able to rise and fall freely.
2 is pushed up by the spring 43, and the lifter plate 3
The lifter plate 36, which is brought into pressure contact with the lower surface of the lifter plate 5, has the same structure as described above, and applies upward spring pressure.

7 to 9 show other embodiments, and only the points different from the first embodiment will be explained.

In this embodiment, the stripper plate 28 is common, the punch bodies 26, 27 have a flat tip only, and the rest are round bar-shaped, and both bodies 26, 27 share a common key 23.
Rotation is prevented by.

45 in FIG. 1 is a striker selection set for the NG punch press, and a striker 46 is attached to the bottom of the set.

This striker 46 is attached to a guide 47 of the striker selection set 45 so as to be movable in the radial direction, and can be moved to a predetermined position by a driving means 48 such as an air cylinder.

Next, the operation of the above embodiment will be explained. First, the molds A as described above are placed on the turret station 21 in a predetermined order as shown in FIG.

Further, a control program is input using a keyboard of a data input panel in an NC control panel (not shown).

After the input of the program is completed, when the automatic operation start switch on the control panel is turned on, the turntable 20 and turret station 21 rotate together according to the command from the NC control panel, and the predetermined mold A is positioned below the guide 47. Stop.

Then, the driving means 48 is operated in response to a command from the NC control panel, and the striker 46 is moved onto a predetermined spade 32 and stopped as shown in FIGS. 4 and 5.

Next, when the elevating member 45 starts to descend and pressurizes the head 32, the head 32 is supported by the spring 43 and the lid plate 35
The punch body 26 begins to descend, and the stripper plate 28 that descends at the same time hits the workpiece 50 on the turntable 20 and stops.

However, the striker 46 continues to descend, strongly pressing the plate 28 against the die 51 and compressing the plural disc springs 39, causing the punch body 26 to descend and punch out the workpiece 50.

Next, when the striker 46 reaches the bottom dead center, the elevating member 45 starts to rise, the punch body 26 is pulled out from the workpiece 50 by the stripper plate 28, and the spring 43 causes the punch body 26, head 32, lifter The plate 35 returns to its original position.

During the above action, the other punch body 27 does not descend, so no punching is performed.

Further, when a machining command for the punch body 27 is issued from the control panel, the striker 46 moves above the head 33 and stops, and the punch body 27 performs the punching process in the same manner as in the above case.

In the case of the second embodiment shown in FIGS. 7 to 9, the same operation as described above is performed, but in this case, the stripper plate 2
8 is a common effect.

Each of the above embodiments shows an example in which two punch bodies are attached to one mold, but there are also cases where three punch bodies are attached to one mold, and in this case, the striker is installed at three locations. be able to move to this position.

〔Effect of the invention〕

As mentioned above, this invention has a punch holder for one mold,
In addition to incorporating multiple punch bodies, the striker that presses down this punch holder is movable, so when performing two or more presses on the workpiece, you can press the workpiece by simply moving the striker without changing the mold. can.

Therefore, compared to the conventional system in which one punch body is assembled into one set of molds, the labor for changing molds and the time required for stopping operation can be reduced, and the operating rate of the press apparatus can be improved. In addition, since no unbalanced load is applied, the durability of the mold is increased.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a partially cutaway plan view of the same turret station, FIG. 3 is a top view of a composite mold used in the device of this invention, and FIG. Figure 3 is a vertical cross-sectional front view taken along line IV-IV, Figure 5 is a vertical cross-sectional side view taken along line V-■ in Figure 3, Figure 6 is a bottom view, and Figure 7 is a second view of the composite mold.
FIG. 8 is a vertical sectional front view of the same embodiment, FIG. 9 is a bottom view, and FIG. 10 is a longitudinal sectional front view of the conventional mold. 21...Turret station, 26.27.
...Punch body, 32.33 ...Head, 46 ... Striker. Patent applicant: Conic Co., Ltd.

Claims (1)

[Claims] (1) A press machine in which a plurality of molds are attached to a moving station, and a striker installed above the station pushes down the upper end of a punch body attached to the molds to perform press processing using the punch bodies. In addition to attaching a plurality of punch bodies to the mold,
A press mold device in which the striker is movable so that the striker can be moved onto any punch body of the mold to perform press working with any punch body.