JPH04147724A - turret punch press - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a turret punch press for punching a plate-shaped workpiece.

[Conventional technology]

The conventional turret punch press has a rotatable upper turret a and a lower turret b as shown in Fig. A workpiece C is punched between molds (dies).

Further, in the conventional turret punch press described above, a disc-shaped upper turret a and a lower turret b are provided parallel to each other, and a workpiece C is inserted between these upper turret a and lower turret b. A predetermined part of the workpiece C is punched while moving the machine.

[Problem to be solved by the invention]

Therefore, when moving the workpiece C to position the punching point, or rotating the upper and lower turrets aSb with the workpiece C inserted between the upper and lower turrets a and b to select the mold to be used, There was a problem in that the lower mold and the lower surface of the work C came into contact, and the lower surface of the work C was damaged by the lower mold, resulting in a significant deterioration in the quality of the product.

This invention was made to improve the above-mentioned problems, and aims to provide a turret punch press that prevents the workpiece from being damaged by the lower die.

[Means and operations for solving the problem] In order to achieve the above object, the present invention has an upper turret and a lower turret each formed into a substantially umbrella shape with opposite directions, so that the central part of the upper turret and the lower turret is The rotating shafts provided on the upper and lower turrets are rotatably supported on the press body by tilting them in advance so that they are vertically symmetrical, and on the outer peripheral sides of the upper and lower turrets, there are a plurality of The upper mold and lower mold are attached.

This ensures that only the die used is in the punching position,
The other dies are in a retracted position from the workpiece, so you may have to move the workpiece to determine the punching position, or move the upper and lower turrets to select the next die to be used with the workpiece inserted between the upper and lower turrets. It is possible to prevent the workpiece from being damaged by the lower die even if it is rotated.

〔Example〕

An embodiment of the present invention will be described in detail with reference to the drawing shown in FIG.

In the figure, 1 is a press main body, and an upper turret 2 is provided at the upper part of a frame 1a, and a lower turret 3 is provided at the lower part.

The upper turret 2 and the lower turret 3 are formed into a substantially umbrella shape, and rotating shafts 2a, 3a fixed to the center are tilted in opposite directions at the same angle.
a is rotatably supported by the frame 1a via a bearing 4.

Further, on the outer periphery of the upper turret 2 and the lower sagging/soto 3, a large number of upper molds (punch) 5 and lower molds (die) 6 are detachably attached at intervals in the circumferential direction. .

When one of the upper mold 5 and lower mold 6 is indexed to the punching position of the press body 1, each upper and lower mold 5.6 is aligned so that the center lines of the upper mold 5 and the lower mold 6 coincide. upper turret 2
In addition to being attached to the lower turret 3, a striker 7 is installed above the punching position and is moved up and down by a drive mechanism (not shown), so as to strike the upper part of the upper die 5 from above. ing.

Furthermore, a support stand 8 is installed below the punching position to abut against the lower surface of the lower turret 3 stopped at the punching position and to support the load from below during punching of the workpiece.

On the other hand, pulleys 12 are fixed to the rotating shaft 2a of the upper turret 2 and the rotating shaft 3a of the lower turret 3, and a timing belt 13 is wound around these pulleys 12.

Each of the timing belts 13 is wound around pulleys 15 attached above and below a drive shaft 14, and the lower end of the drive shaft 14 is connected via a reducer 16 to a turret drive motor 17 consisting of a servo motor. By rotating the drive shaft 14 by the turret drive motor 17, the upper turret 2 and the lower turret 3 can be indexed and rotated in synchronization.

In addition, 19 in the figure is a clamp that clamps the workpiece 20 to be punched and moves the workpiece 20 in the X-Y direction.
Controlled by an NC device (not shown), the punching part of the workpiece 20 is positioned at the punching position of the press body 1, and
The workpiece 20 is supported from below by a large number of free bearings 21 installed on the table IC.

Next, the operation will be explained. The workpiece 20 to be punched is clamped by the clamp 19, and the punching part is positioned at the punching position.

At this time, the work 20 moves on the free bearing 21, and one of the lower molds 6 provided on the lower turret 3 for punching is in the punching position, and the other lower mold 6 is in the punching position.
is retracted below the moving surface of the workpiece 20,
It is possible to prevent the lower surface of the workpiece 20 from being damaged by the lower mold 6.

Next, when the punching part of the workpiece 20 is positioned at the punching position of the press body 1, the striking member 7 is lowered by a drive mechanism (not shown), and the upper mold 5 of the upper turret 2 is moved to the striking member 7.
The workpiece 20 is punched from above between the upper die 5 and the lower die 6.

Thereafter, the above-mentioned operations are repeated to punch out the workpiece 20. When changing the mold to be used, the drive shaft 14 is rotated by the turret drive motor 17.

As a result, the rotation shafts 2a of the upper turret 2 and the lower turret 3 are connected to each other via the timing belt 13.

3a are rotated synchronously, and the upper mold 5 and lower mold 6 of the upper turret 2 and lower turret 3 are indexed to the punching position.

When the indexing of the upper and lower molds 5 and 6 is completed, a positioning mechanism (not shown) positions the upper and lower turrets 2 and 3 at the indexed positions, so that accurate positioning is possible.

Also, when the upper and lower turrets 2 and 3 are rotated to index the upper and lower molds 5 and 6 to be used next, the lower mold 6 provided on the lower turret 3 may come into contact with the lower surface of the work 20. Therefore, the lower surface of the workpiece 20 can be prevented from being damaged by the lower mold 6.

〔Effect of the invention〕

As described in detail above, the present invention has the upper and lower turrets formed in a substantially umbrella shape, and the rotating shafts provided in the center are tilted in advance so as to be vertically symmetrical, and are rotatably supported on the press body. Since the upper and lower molds were attached to the upper and lower turrets so that when one of the multiple upper and lower molds installed on the turret was indexed to the punching position, the center lines of these molds coincided, the gap between the upper and lower molds was Even if the workpiece is moved to punch out the workpiece or the upper and lower turrets are rotated synchronously to select the mold to be used, the lower mold provided on the lower turret does not come into contact with the lower surface of the workpiece.

This prevents the lower surface of the workpiece from being damaged by the lower mold, resulting in a product of good quality.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a turret punch press according to an embodiment of the present invention, and FIG. 2 is an explanatory view of a conventional turret punch press. 1 is a press body, 2 is an upper turret, 2a is a rotating shaft, 3 is a lower turret, 3a is a rotating shaft, 5 is an upper mold, and 6 is a lower mold.

Claims (1)

[Claims] The upper turret 2 and the lower turret 3 are formed into substantially umbrella shapes with opposite directions, and are tilted in advance so that the rotation axes 2a and 3a provided at the center of the upper turret 2 and the lower turret 3 are vertically symmetrical. The press body 1 is rotatably supported, and a plurality of upper molds 5 and lower molds 6 are attached to the outer peripheral sides of the upper turret 2 and lower turret 3 at intervals in the circumferential direction. A turret punch press.