JP2000084632A - Press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an output of an actuator and to reduce a size by rotatably arranging a die holder to hold a die to a air bearing, forming a minute annular clearance between the inside of a bearing and the outside of the die holder, supplying air to the clearance and rotatably supporting the die holder. SOLUTION: A body frame 3 is provided with an upper frame 5 and a lower frame 7. An upper turret 11 arranged with an upper die 9R is rotatably arranged to the upper frame 5, a lower die 13R is rotatably arranged to the lower frame 7. Holding bases are arranged to respective frames 5, 7, an upper air bearing 47 and a lower air bearing 31 are arranged to support holes arranged therein, an upper die holder 49 and a lower die holder 33 are rotatably arranged inside these air bearings. A minute annular clearance is formed between the inside of the air bearings 47, 31 and the outside of the die holders 49, 33, the die holders 49, 33 are rotatably supported by air pressure, the die holders 49, 33 are rotated by using an actuator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine for performing press working on a sheet material.

[0002]

2. Description of the Related Art A conventional press machine will be briefly described.

The press machine is based on a bridge-type main body frame, and the main body frame has an upper frame and a lower frame which are vertically opposed to each other. The lower frame is provided with a lower holding base, and a lower supporting hole formed in the lower holding base is provided with a lower ball bearing. A lower mold holder for holding the lower mold is rotatably provided on the lower ball bearing.
Similarly, an upper holding base is provided on the upper frame so as to face the lower holding base vertically, and an upper ball bearing is provided in an upper support hole formed in the upper holding base. An upper mold holder for holding the upper mold is rotatably provided on the upper ball bearing. A rotation motor is provided for rotating the upper mold holder and the lower mold holder synchronously.

Accordingly, the upper mold holder and the lower mold holder are rotated synchronously by driving the rotary motor. Thus, when one mold (lower mold, upper mold) is held by one mold holder (lower mold holder, upper mold holder), the mold is rotated. , The direction of the mold can be changed. Further, when a plurality of dies are held in one dies holder, a plurality of dies can be revolved, and a predetermined one of the plurality of dies can be indexed into a processing area. . Then, the upper die and the lower die are appropriately operated to perform desired press working on the plate material.

[0005]

Since the mold holder is rotatably supported by the ball bearing, galling may occur between the movable portion (inner rail) of the ball bearing and the ball, and the mold holder may be displaced. There is a problem that it cannot be stably rotatably supported.

Accordingly, an object of the present invention is to provide a press machine which can solve the above problems and reduce the output of an actuator (for example, a rotary motor) to reduce the size of the actuator.

[0007]

According to the first aspect of the present invention, a holding base is provided on a frame, an air bearing is provided in a support hole formed in the holding base, and a mold is mounted on the air bearing. A mold holder to be held is provided rotatably, a minute annular gap is formed between the inside of this air bearing and the outside of the mold holder, and the mold holder is rotated by the air pressure of the air sent to this annular gap. It is configured to be freely supported and provided with an actuator for rotating the mold holder.

According to the first aspect of the present invention,
By supplying air to the annular gap, the mold holder can be rotatably supported by the air pressure of the air in the annular gap. Then, the mold holder is rotated by driving the actuator while air is supplied to the annular gap. Thus, when one mold is held in one mold holder, the direction of the mold can be changed by rotating the mold. Further, when a plurality of dies are held in one dies holder, a plurality of dies can be revolved, and a predetermined one of the plurality of dies can be indexed into a processing area. . Further, a desired press working is performed on the plate material by appropriately operating the mold.

In the invention described in claim 2, in addition to the matters specified in the invention described in claim 1, a large number of communication holes communicating from the outside to the inside of the bearing are provided, and a large number of communication holes are formed in the holder holding base. An air reservoir communicating with the communication hole is formed, and air supply means for supplying air to the air reservoir is provided.

According to the invention specifying matter of claim 2,
In addition to the action according to the first aspect of the present invention, when air is supplied to the air reservoir by the air supply means, the air is sent to the annular gap through a number of communication holes, and the air pressure of the air in the annular gap is increased by the air pressure. The mold holder can be rotatably supported.

[0011]

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

Referring to FIG. 4, a turret punch press (an example of a press machine) 1 according to an embodiment of the present invention is based on a bridge-type main body frame 3, and the main body frame 3 is The lower frame 7 is provided so as to face up and down (up and down in FIG. 4). An upper turret 11 having a plurality of upper molds 9 is rotatably provided at a front portion (right portion in FIG. 4) of the upper frame 5,
A lower turret 15 having a plurality of lower molds 13 is provided at the front of the lower frame 7 so as to be rotatable and vertically opposed to the upper turret 11. Above the upper turret 11, a striker 17 that presses a predetermined upper mold 9 from above.
The striker 17 is provided on the upper frame 5
Is moved up and down by the operation of the hydraulic cylinder 19 provided in the first position.

The lower turret 15 in the lower frame 7
A work table 21 for supporting the plate material W is provided on the rear side of the fixed table. The work table 21 is provided on both left and right sides (front and back in FIG. 4) of the fixed table and is movable in the front-rear direction. It has a pair of movable tables and the like. A carriage base 23 extending in the left-right direction is provided at the rear part of the pair of movable tables, and the carriage base 23 is provided with a plurality (only one is shown) of work clampers 25 for clamping an end of the plate material W. The carriage 27 is provided movably in the left-right direction.

With the above configuration, the upper turret 11 and the lower turret 15 are rotated in the same direction in synchronization with each other, and the predetermined upper die 9 and the predetermined lower die 13 are indexed into the processing area. Further, the plate material W is formed by a plurality of work clampers 25.
The carriage W is moved in the front-rear direction integrally with the pair of movable tables in a state in which the end of the upper turret 11 is clamped, and the carriage 27 is moved in the left-right direction, so that the plate material W Lower turret 1
Positioning at a predetermined position between 5. Then, by pressing the predetermined upper mold 9 from above by the striker 17 by the operation of the hydraulic cylinder 19, a desired punching process (an example of a press process) can be performed on the plate material W.

Referring to FIG. 1 to FIG. 3, a pair of predetermined lower dies 13R among a large number of lower dies 13
(Vertically below the striker 17)
The upper turret 15 is configured so as to be rotatable with respect to the lower turret 15, and similarly, a pair of predetermined upper dies 9R out of the large number of upper dies 9 are indexed into a processing area and then the upper turret 1
It is configured to be able to rotate with respect to one.

That is, a lower air bearing 31 is provided in a lower support hole 29 formed in the lower turret 15, and a lower die holder 33 for holding the lower die 13R is rotatable in the lower air bearing 31. It is provided.
The lower air bearing 31 has a large number of communication holes H communicating from the outside to the inside.
1, a small lower annular gap 35 is formed between the inside of the lower mold holder 33 and the outer side of the lower mold holder 33.
The lower die holder 33 is rotatably supported by the air pressure of the air sent to the lower die holder 33. The lower turret 15 is formed with a lower air reservoir 37 communicating with a large number of communication holes H. In order to supply air to the lower air reservoir 37, air supply circuits 39 and 41 are provided in the lower air reservoir 37. The air supply circuit 41 is connected to an air source 43.

Similarly, an upper air bearing 47 is provided in an upper support hole 45 formed in the upper turret 11, and an upper die holder 49 for holding an upper die 9R is rotatable in the upper air bearing 47. In addition to the above, an upper annular gap (not shown), an upper air reservoir (not shown) and the like are appropriately provided.

A lower worm wheel 51 is provided on the outer periphery of each lower mold holder 33, and a lower rotary shaft 55 having a lower worm 53 meshing with the corresponding lower worm wheel 51 is rotatable on the lower turret 15. It is provided in. A lower connector 57 is rotatably provided on the lower frame 7, and the lower connector 57 is provided with a predetermined lower mold 1.
When the 3R is indexed into the machining area A, it can be connected to the lower rotary shaft 55.

Similarly, each upper mold holder 49 is provided with an upper worm wheel 59, and the upper turret 11 is provided with an upper rotating shaft 63 having a pair of upper worms 61 meshed with the corresponding upper worm wheel 59. It is provided rotatably. An upper connection tool 65 is rotatably provided on the upper frame 5, and is configured such that the upper connection tool 65 can be connected to the upper rotation shaft 63 when a predetermined upper mold 9 </ b> R is indexed into the processing area A. . A rotary motor 67 is provided at an appropriate position on the main body frame 3, and the rotary motor 67 synchronously rotates the lower connector 57 and the upper connector 65 in the same direction.

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

When air is supplied from the air source 43 to the lower air reservoir 37 via the air supply circuits 39 and 41, the air is sent to the lower annular gap 35 through a number of communication holes H, and the air in the lower annular gap 35 is supplied. The lower mold holder 33 can be rotatably supported by the air pressure. Similarly, when air is supplied to the upper air reservoir, the air is sent to the upper annular gap, and the upper mold holder 49 can be rotatably supported by the air pressure of the air in the upper annular gap. And
With the lower connector 57 connected to the lower rotary shaft 55 and the upper connector 65 connected to the upper rotary shaft 63, the lower connector 57 and the upper connector 65 are synchronized by driving the rotary motor 67. By rotating in the same direction, the lower mold holder 33 and the upper mold holder 49 are operated by the action of the worm wheel 51 (59) and the worm 53 (61).
To rotate. Thus, the direction of the upper mold 9R and the direction of the lower mold 13R can be changed by rotating the upper mold 9R and the lower mold 13R. Then, a desired punching process is performed on the plate material W by pressing the predetermined upper mold 9R from above with the striker 17.

As described above, according to the embodiment of the present invention, unlike the ball bearing, in the air bearing 31 (47), no galling occurs and the mold holder 33 (49) is connected to the air bearing 31 (47). ) Can be stably rotatably supported.

Further, since the air bearing 31 (47) can rotatably support the mold holder 33 (49) in a non-contact manner, the output of the rotary motor 67 for rotating the mold holder 33 (49) is reduced. Be able to
The size of the rotary motor 67 can be reduced.

The present invention is not limited to the description of the embodiment of the invention as described above.
In addition to holding one mold 9R (13R), each mold holder 33 (49) holds a plurality of molds 96R (13R), and rotates the mold holder 33 (49). By doing so, the plurality of molds 9R (13R) revolve and a predetermined mold 9R of the plurality of molds 9R (13R) is revolved.
(13R) may be configured to be indexed to the processing area.

[0025]

According to the first or second aspect of the present invention, unlike the ball bearing, in the air bearing, no galling occurs, and the mold holder is stably rotatably supported by the air bearing. be able to.

Since the air bearing can rotatably support the mold holder in a non-contact manner, the output of the actuator for rotating the mold holder can be reduced, and the actuator can be downsized. it can.

[Brief description of the drawings]

FIG. 1 is a view taken along line II in FIG.

FIG. 2 is an enlarged view of an arrow part II in FIG.

FIG. 3 is a view along the line III-III in FIG. 2;

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

[Explanation of symbols]

 Reference Signs List 1 turret punch press 5 upper frame 7 lower frame 9, 9R upper mold 11 upper turret 13, 13R lower mold 15 lower turret 29 lower support hole 31 lower air bearing 33 lower mold holder 35 lower annular gap 37 lower air reservoir 39 , 41 Air supply circuit 43 Air source 45 Upper support hole 47 Upper air bearing 49 Upper mold holder 67 Rotary motor

Claims (2)

[Claims] 1. A holding base is provided in a frame, an air bearing is provided in a support hole formed in the holding base, and a mold holder for holding a mold is rotatably provided in the air bearing. A small annular gap is formed between the mold holder and the outside of the mold holder, and the mold holder is rotatably supported by the air pressure of the air sent to the annular gap, and the mold holder is rotated. A press machine comprising an actuator. 2. An air supply means comprising: a plurality of communication holes communicating with the air bearing from the outside to the inside; forming an air reservoir communicating with the plurality of communication holes in the holding base; and supplying air to the air reservoir. The press machine according to claim 1, wherein the press machine is provided.