JP2001009538A - Die pressing device, and punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten an operation time by an improvement in a hit rate, while saving energy as well. SOLUTION: A double cylinder 27 is installed in an upper frame 5, wherein the cylinder 27 is constituted with a first piston 37 having a relatively large pressure working area, and a second piston 39 having a relatively small pressure working area in a way that the second piston 39 can be elevated individually or the first piston 37 and the second piston 39 can be elevated integrally. A sleeve like first striker 29 is installed at a bottom end part of a first piston rod 41 being connected with the first piston 37. A second striker 31 is installed at a bottom end part of a second piston rod 43 being installed to the second piston 39. The second striker 31 is made to be supported elevatably in a through hole 29h of the first striker 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die pressing device for pressing a punch die in a punch press, and a punch press using the die pressing device.

[0002]

2. Description of the Related Art A conventional die pressing device will be briefly described as follows.

That is, a hydraulic cylinder is provided on a frame in a punch press.
A cylinder body fixed to the frame, a piston provided in the cylinder body so as to be able to move up and down, and a piston rod provided on the piston are provided. A striker is provided at the lower end of the piston rod. Here, the pressure acting area of the piston is configured to be large so that it can cope with processing involving a large processing load (for example, punching processing of a thick plate-shaped work). It is big.

Therefore, the striker is lowered integrally with the piston rod by lowering the piston. With this, under a large pressing force, the punch die is pressed by the striker to process the workpiece (for example, punching,
Molding, engraving).

[0005]

In the meantime, apart from the case of performing a process with a large processing load, the case of performing a process with a normal processing load and a process with a small processing load, the pressing of a punch die is performed. There is no need to increase the pressure. On the other hand, when performing processing with a normal processing load (for example, normal punching processing and forming processing) and processing with a small processing load (for example, punching processing and engraving processing for a thin plate-shaped work), the piston is inserted into the cylinder body. Therefore, a large amount of oil corresponding to the pressure action area must be supplied, and there is a problem that it is not easy to reduce the working time by saving energy and improving the hit rate.

Accordingly, an object of the present invention is to provide a die punching device and a punch press which can shorten the working time by saving energy and improving the hit rate.

[0007]

According to a first aspect of the present invention, in a die pressing apparatus for pressing a punch die in a punch press, a double cylinder is provided on a frame in the punch press. Comprises a first piston having a relatively large pressure acting area, a second piston having a relatively small pressure acting area,
A first piston rod provided on the piston and a second piston rod provided on the second piston are provided to individually raise and lower the first piston and the second piston, or to integrally form the first piston and the second piston. The first striker is provided with a sleeve-shaped first striker at the lower end of the first piston rod, and the second striker is arranged at the lower end of the second piston rod. The striker is configured to be supported by the through hole so as to be able to move up and down.

According to the first aspect of the present invention,
When performing a process involving a normal processing load (for example, a normal punching process or a forming process), the first pistons are individually lowered, and the first striker is lowered together with the first piston rod. Thus, the work with a normal processing load can be performed on the workpiece by pressing the punch die with the first striker under a normal pressing force corresponding to the pressure acting area of the first piston.

In the case of performing a process involving a small processing load (for example, punching or engraving on a thin work), the second pistons are individually lowered, and the second striker is lowered together with the second piston rod. Let it. Thus, the punch is pressed by the second striker under a small pressing force corresponding to the pressure application area of the second piston, and the work is performed with a small processing load.

Further, when performing a process involving a large processing load (for example, a punching process for a work having a thick plate shape), the first piston and the second piston are integrally lowered, and the first striker and the second striker are lowered. (2 strikers) are lowered integrally. Thus, under a large striking force corresponding to the sum of the pressure acting area of the first piston and the pressure acting area of the second piston, the punching die is pressed by the two strikers to apply a large machining load to the work. Accompanying processing can be performed.

According to the second aspect of the present invention, a disk-shaped rotatable upper turret and a disk-shaped rotatable lower turret are vertically opposed to each other, and a large number of punch dies are provided on the upper turret. Holding at appropriate intervals in the circumferential direction and turret radial direction, holding a plurality of die dies in the lower turret at appropriate intervals in the turret circumferential direction and turret radial direction, and providing a double cylinder above the upper turret. Are a first piston having a relatively large pressure acting area, a second piston having a relatively small pressure acting area, a first piston rod provided on the first piston, and a second piston provided on the second piston. A two-piston rod is provided so that the first piston and the second piston can be individually raised and lowered, or the first piston and the second piston can be integrally raised and lowered Configured, the first striker sleeve-like provided at the lower end of the first piston rod, said second
A second striker is provided at a lower end of the piston rod, and the second striker is configured to be supported in a through hole of the first striker so as to be able to move up and down. The first striker and the second striker are integrally movable with respect to the first piston rod, and the second striker is configured to be movable with respect to the second piston rod in the turret radial direction. It is characterized in that a moving operation device for moving in the direction is provided.

According to the second aspect of the present invention,
By rotating the upper turret and the lower turret, a predetermined punch die and a predetermined die die are indexed into a processing area. Further, the first striker and the second striker (two strikers) are moved in the turret radial direction by the moving operation means.
As a result, the two strikers are positioned above a predetermined punch die.

After the two strikers have been positioned above the predetermined punch die, the same operation as the operation according to the first aspect of the present invention is exerted.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 4, a punch press 1 according to an embodiment of the present invention is based on a bridge-type main body frame 3, and this main body frame 3 is
And a lower frame 7 facing vertically (up and down in FIG. 4). The lower frame 7 has a plate-shaped work W
The work table device 9 is provided with a fixed table fixed to the lower frame 7 and the front and rear of the fixed table on the lower frame 7 (front and back in FIG. 4 as viewed in the drawing). And a pair of movable tables movably provided in the directions (right and left directions in FIG. 4). Work table device 9
In the front part of the pair of movable tables, a carriage base 11 is provided extending in the left-right direction, and a plurality of clamps (only one is shown in the drawing) for clamping the end of the work W is provided on the carriage base 11. The carriage 15 provided with the work clamper 13 is provided so as to be movable in the left-right direction.

A disk-shaped upper turret 17 is rotatably provided on the upper frame 5, and a disk-shaped lower turret 19 is rotatable and provided on the lower frame 7.
Are provided to face each other up and down. A number of punch dies 21 are mounted on the upper turret 17 at appropriate intervals in the turret circumferential direction and the turret radial direction.
Has a large number of die molds 23 mounted at appropriate intervals in the turret circumferential direction and the turret radial direction.

The upper turret 17 in the upper frame 5
A die pressing device 25 for pressing the punch die 21
The die pressing device 25 includes a double cylinder 27, and first and second annular strikers 29 and 31 that move up and down by the operation of the double cylinder 27.

More specifically, referring to FIGS. 1-4,
A cylinder body 33 is provided above the upper turret 17 in the upper frame 5 (upward in FIGS. 1, 2 and 4 and facing outward in FIG. 3). A cylinder chamber 35 is formed. A ring-shaped first piston 37 having a relatively large pressure acting area is provided in the first cylinder chamber 35 so as to be able to move up and down, and this first piston 37 is moved up and down by a projection 33 a on the top floor side of the cylinder body 33. Supported as possible. A second cylinder chamber 38 is formed between the central recess of the first piston 37 and the projection 33a of the cylinder body 33, and a circular cylinder having a relatively small pressure working area is formed in the second cylinder chamber 38. A second piston 39 is provided so as to be able to move up and down. Here, the first piston 37 and the second piston 3
The first piston 37 and the second piston 39 can be moved up and down individually. The first piston 37 has the first piston rod 4
1 is provided, and the second piston 39 is provided with a second piston rod 43.

At the lower end of the first piston rod 41, a support block 45 is provided via a connecting member 47.
The support block 45 includes a flat plate having an opening N, and a pair of side plates fixed to the front and rear of the flat plate (right and left in FIGS. 1 and 4, front and back in FIG. 2 toward the paper surface, and lower and upper in FIG. 3). It has. Further, the connecting member 47
The lower end of a first slide bar 49 is integrally connected to the first slide bar 49, and the first slide bar 49 is supported by a first guide bush 51 fixed to the upper frame 5 so as to be able to move up and down. At the lower end of the second piston rod 43, a slot guide 53 having a T-slot is provided via a connecting member 55, and the lower end of the second slide bar 57 is integrally connected to the connecting member 55. The second slide bar 57 is supported by a second guide bush 59 fixed to the upper frame 5 so as to be able to move up and down. Here, the slot guide 53 is located between the pair of side plates of the support block 45 and is configured to be able to move up and down between the pair of side plates.

A slider 61 is provided below the support block 45.
Is provided so as to be movable in the front-back direction (turret radial direction).
9 is provided integrally, and a second striker 31 is supported in a through hole 29h of the first striker 29 so as to be able to move up and down. Further, the upper end of the second striker 31 is supported by the slot guide 53 so as to be movable in the front-rear direction and cannot be detached. In order to move the slider 61 in the front-rear direction, a fixed cylinder 65 provided with a piston rod 63 movable in the front-rear direction is provided on the rear side of the slider 61 via a bracket 67, and is provided on the front side of the slider 61. Is provided with a movable cylinder 71 having a piston rod 69 movable in the front-rear direction via a bracket 73, and a distal end of the piston rod 63 and the piston rod 6
9 are integrally connected via a coupling 75. Here, the fixed cylinder 65 and the movable cylinder 7
1, the slider 61 can be moved in the front-rear direction (turret radial direction) to change the front-rear position of the strikers 29, 31 to one of three positions as shown in FIG. It is.

An injection passage 77 for injecting air or mist is provided inside the second striker 31, and this injection passage 77 communicates with a communication passage 79 formed inside the first striker 29. The communication passage 79 communicates with a supply passage 81 formed inside the slider 61.

Next, the operation of the embodiment of the present invention will be described.

By rotating the upper turret 17 and the lower turret 19, a predetermined punch die 21 and a predetermined die die 2 are rotated.
3 is indexed to the machining area. The slider 61 is moved in the front-rear direction (turret radial direction) by appropriate operation of the fixed cylinder 65 and the movable cylinder 71, and the front-rear position (position in the turret radial direction) of the two strikers 29, 31 is set to a predetermined position. change. By this, two strikers 2
9 and 31 can be positioned vertically above (directly above) the predetermined punching die 21.

Further, while the plate-shaped work W is clamped by the plurality of work clampers 13, the carriage base 11 is moved in the front-rear direction together with the pair of movable tables, and the carriage 15 is moved in the left-right direction.
As a result, the workpiece W is moved in the front-rear direction and the left-right direction, and the portion to be processed of the workpiece W is positioned between the predetermined punch die 21 and the predetermined die 23.

When a process involving a normal processing load (for example, a normal punching process or a forming process) is performed, oil is supplied to the upper portion of the first piston 37 in the first cylinder chamber 35 to supply the first The pistons 37 are individually lowered to lower the first striker 29 together with the first piston rod 41. As a result, a predetermined punching die 21 is pressed by the first striker 29 under a normal pressing force corresponding to the pressure acting area of the first piston 37, and the work W is processed with a normal processing load. It can be performed.

In the case of performing a processing involving a small processing load (for example, punching or engraving on a thin work W), oil is supplied to the upper part of the second piston 39 in the second cylinder chamber 38. Then, the second pistons 39 are individually lowered to lower the second strikers 31 together with the second piston rods 43. Thereby, under a small striking force corresponding to the pressure acting area of the second piston 39,
By pressing a predetermined punching die 21 with the second striker 31, it is possible to perform processing with a small processing load on the work W.

Further, when performing a process involving a large processing load (for example, a punching process for a work W in the form of a thick plate), the upper portion of the first piston 37 in the first cylinder chamber 35 and the second cylinder chamber 38 The oil is supplied to the upper part of the second piston 39 to lower the first piston 37 and the second piston 39 integrally, thereby lowering the first striker 29 and the second striker 31 integrally. Thus, under a large pressing force corresponding to the sum of the pressure acting area of the first piston 37 and the pressure acting area of the second piston 39, a predetermined punching die 21 is pressed by the two strikers 29, 31. Processing with a large processing load can be performed on the work W.

As described above, according to the embodiment of the present invention, when performing the processing with the normal processing load and the processing with the small processing load, any one of the pistons is used in accordance with the magnitude of the processing load. It is sufficient to raise and lower the 37 (or 39), and it is not necessary to supply a large amount of oil into the double cylinder 27, so that it is possible to save energy, and also to improve the hit rate and shorten the working time. it can.

[0029]

According to the first or second aspect of the present invention, in the case of performing processing with a normal processing load and processing with a small processing load, the processing is performed according to the magnitude of the processing load. It is sufficient to raise or lower one of the first piston and the second piston, so that it is not necessary to supply a large amount of oil into the double cylinder, energy can be saved, and the hit rate is improved by increasing the hit rate. Shortening can be achieved.

[Brief description of the drawings]

FIG. 1 is a view taken along the line II in FIG. 2;

FIG. 2 is a front sectional view of a mold pressing device.

FIG. 3 is a view along the line III-III in FIG. 1;

FIG. 4 is a side view of the punch press.

[Explanation of symbols]

 Reference Signs List 1 punch press 17 upper turret 19 lower turret 21 punch die 23 die die 25 die pressing device 27 double cylinder 29 first striker 31 second striker 37 first piston 39 second piston 41 first piston rod 43 second Piston rod

Claims (2)

[Claims] 1. A die pressing device for pressing a punch die in a punch press, wherein a double cylinder is provided on a frame of the punch press, and the double cylinder is compared with a first piston having a relatively large pressure action area. A second piston having an extremely small pressure acting area, a first piston rod provided on the first piston, and a second piston provided on the second piston.
A piston rod, the first piston and the second piston can be individually raised and lowered, and the first piston and the second piston can be integrally raised and lowered, and a sleeve is provided at a lower end of the first piston rod. A first striker is provided, and a second striker is provided at a lower end portion of the second piston rod, and the second striker is configured to be supported in a through hole of the first striker so as to be able to move up and down. Mold pressing device. 2. A disk-shaped rotatable upper turret and a disk-shaped rotatable lower turret are provided vertically facing each other, and a number of punching dies are provided on the upper turret at appropriate intervals in the turret circumferential direction and the turret radial direction. Holding, holding a plurality of die dies on the lower turret at appropriate intervals in the turret circumferential direction and the turret radial direction, and providing a double cylinder above the upper turret, which has a relatively large pressure acting area A first piston having a first piston, a second piston having a relatively small pressure acting area, a first piston rod provided on the first piston, and a second piston rod provided on the second piston; And the second piston can be individually raised and lowered, and the first and second pistons can be integrally raised and lowered, and the first piston rod A first striker in the form of a sleeve is provided at the lower end of the second striker, a second striker is provided at the lower end of the second piston rod, and the second striker is supported by the through hole of the first striker so as to be able to move up and down. The first striker is configured to be movable relative to the first piston rod in the turret radial direction relative to the first piston rod, and the second striker is configured to be movable in the turret radial direction relative to the second piston rod. A punch press, comprising: a moving operation device configured to integrally move a first striker and a second striker in a turret radial direction.