JPH07108426B2 - Turret punch press - Google Patents

Description

The present invention relates to a turret punch press for punching a plate-shaped work.

[Conventional technology]

As shown in FIG. 2, a conventional turret punch press has a rotatable upper turret a and a lower turret b, and an upper die (punch) and a lower die provided on the upper turret a and the lower turret b. The work c is punched between the dies.

In the above-mentioned conventional turret punch press, a disk-shaped upper turret a and a lower turret b are provided so as to be parallel to each other, and a work c is inserted between the upper turret a and the lower turret b. A predetermined portion of the work c is punched while moving the.

[Problems to be Solved by the Invention]

Therefore, when the work c is moved to position the punching point or the upper and lower turrets a and b are rotated with the work c inserted between the upper turret a and the lower turret b, the die to be used is selected. The lower die is in contact with the lower surface of the work c, the lower die damages the lower surface of the work c, and the quality of the product is significantly deteriorated.

The present invention has been made for the purpose of improving the above problems, and an object of the present invention is to provide a turret punch press in which the work is prevented from being damaged by the lower die.

[Means and Actions for Solving the Problems]

In order to achieve the above-mentioned object, the present invention forms the upper turret and the lower turret into substantially opposite umbrella shapes, and the rotation shafts provided at the central portions of the upper turret and the lower turret are vertically symmetrical. In such a manner that it is preliminarily inclined and rotatably supported by the press body, and a plurality of upper and lower dies are attached to the outer peripheral side of the upper turret and the lower turret at intervals in the circumferential direction. Is.

As a result, only the mold to be used is in the punching position,
Other molds will be retracted from the work, so move the work to position the punching position, or insert the work between the upper and lower turrets and select the upper and lower turrets to select the next mold to use. It is possible to prevent the work from being damaged by the lower mold even when rotated.

〔Example〕

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

In the figure, reference numeral 1 is a press body, and an upper turret 2 is provided on an upper portion of a frame 1a and a lower turret 3 is provided on a lower portion thereof.

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

A large number of upper molds (punch) 5 and lower molds (die) 6 are detachably attached to the outer peripheral sides of the upper turret 2 and the lower turret 3 at intervals in the circumferential direction.

Then, when one of the upper die 5 and the lower die 6 is indexed to the punching position of the press body 1, the upper die 5 and the lower die 6 are aligned so that the center lines of the upper die 5 and the lower die 6 are aligned with each other. Is attached to the upper turret 2 and the lower turret 3, and a striking element 7 which is vertically moved by a drive mechanism (not shown) is installed above the punching position to strike the upper part of the upper die 5 from above. It is supposed to do.

Further, below the punching position, there is provided a pedestal 8 that abuts the lower surface of the lower turret 3 stopped at the punching position and supports the load at the time of punching the work from below.

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

Each of the timing belts 13 is wound around a pulley 15 mounted above and below a drive shaft 14, and the lower end of the drive shaft 14 is connected to a turret drive motor 17 composed of a servo motor via a speed reducer 16. This turret drive motor
By rotating the drive shaft 14 by 17, the upper turret 2
The lower turret 3 can be indexed and rotated in synchronization with each other.

Reference numeral 19 in the drawing is a clamp for clamping the work 20 to be punched and moving the work 20 in the XY directions. The punching position of the work 20 is controlled by an NC device (not shown) and the punching position of the press body 1 is controlled. Work piece 20
Is a large number of free bearings 21 installed on the table 1c.
Is supported from below.

The operation will be described below. The work 20 to be punched is clamped by the clamp 19 and the punching position is positioned at the punching position.

At this time, the work 20 moves on the free bearing 21, and the lower die 6 provided on the lower turret 3 is in a punching position with one piece for punching, and the other lower die 6 moves the work 20. Since it is retracted below the surface, the lower surface of the work 20 can be prevented from being damaged by the lower mold 6.

Next, when the punching point of the work 20 is positioned at the punching position of the press body 1, the hitting element 7 is lowered by a driving mechanism (not shown), and the upper die 5 of the upper turret 2 is hit by the hitting element 7 from above. Then, the work 20 is punched between the upper die 5 and the lower die 6.

The above operation is repeated to punch the work 20. When the die to be used is changed, the drive shaft 14 is rotated by the turret drive motor 17.

This allows the upper turret 2 to pass through the timing belt 13.
The rotating shafts 2a and 3a of the lower turret 3 are synchronously rotated, and the upper die 5 and the lower die 6 of the upper turret 2 and the lower turret 3 are indexed to the punching position.

When the upper and lower dies 5 and 6 have been indexed, a positioning mechanism (not shown) positions the upper and lower turrets 2 and 3 at the indexing positions, which enables accurate positioning.

Also, rotate the upper and lower turrets 2 and 3 to use the upper and lower dies.
Since the lower die 6 provided on the lower turret 3 does not come into contact with the lower surface of the work 20 even when indexing 5, 6, the lower surface of the work 20 is not damaged by the lower die 6. Can be prevented.

〔The invention's effect〕

As described in detail above, according to the present invention, the upper and lower turrets are formed in a substantially umbrella shape, and the rotation shaft provided in the central portion is preliminarily inclined so as to be vertically symmetrical and rotatably supported by the press body. Since the upper and lower dies are attached to the upper and lower turrets so that the center lines of these dies are aligned when the one of the upper and lower dies provided on the turret is indexed to the punching position, Even if the work is moved to punch the work or the upper and lower turrets are synchronously rotated to select the mold to be used, the lower mold provided in the lower turret does not come into contact with the lower surface of the work.

As a result, since the lower surface of the work is not damaged by the lower mold, a high quality product can be obtained.

BRIEF DESCRIPTION OF THE 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 rotary shaft, 3 is a lower turret, 3a is a rotary shaft, 5 is an upper mold, and 6 is a lower mold.

Claims (1)

[Claims] 1. An upper turret 2 and a lower turret 3 are formed in a substantially umbrella shape in which the upper turret 2 and the lower turret 3 face in opposite directions.
And the rotating shafts 2a, 3a provided at the center of the lower turret 3 are preliminarily tilted so as to be vertically symmetrical and rotatably supported by the press body 1, and the outer peripheral side of the upper turret 2 and the lower turret 3 A turret punch press in which a plurality of upper molds 5 and lower molds 6 are mounted at intervals in the circumferential direction.