JPH07164071A - Index device for punch tool - Google Patents

Abstract

PURPOSE:To make the constitution simple and small so as to increase a kind of working by laying out a worm engaged to a worm wheel arranged in each die and constituting so that one end of the worm is coaxially coupled with a drive shaft arranged in main body side. CONSTITUTION:As a servo motor 40 is driven, a drive shaft 50 is rotated through belts 42, 43, pulleys 47, 48, belt 52, pulley 51, the worm shaft 37 connected to the drive shaft 50 through a coupling 57 on the extension of the shaft 50 is rotated, and a direction of an upper die is changed with rotating a worm wheel 34a of a holder 34. Further, in a lower die, a holder 33 is rotated in the same way from a rotating drive mechanism A through belt, the upper die and lower die are aligned, executing working, other dies on turrets 31, 32 are rotated in the same way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching tool, and more particularly to an indexing device for rotating an upper die and a lower die of a turret punch press at a desired angle.

[0002]

2. Description of the Related Art Conventionally, a punch press having an upper die and a lower die simultaneously rotated about the same shaft center to open a large number of different holes in the same upper die and lower die. I was allowed to. As shown in FIG. 10, the rotating mechanism of the upper die 4 and the lower die 8 is configured to be substantially symmetrical in the vertical direction. Therefore, the upper side will be described. The turret 2 is attached to the lower portion of the upper frame 1 fixed to the main body. It is rotatably supported, and the upper mold 4.4 along the outer circumference of the turret 2.
, Each of which is provided with a worm wheel 3a formed above the holder 3, and a worm formed at one end of the worm shaft 5 meshes with the worm wheel 3a. A bevel gear 6 is fixed to the other end of the bevel gear 5, and a bevel gear 7 is attached to the bevel gear 6.
, The bevel gear 7 is fixed to a driven shaft 10 which is rotatably supported in the vertical direction, and a coupling 12 is fixed to the upper end of the driven shaft 10. A ring 11 is fixed to the lower end of the drive shaft 9, and an upper part of the drive shaft 9 forms a piston 14 in a cylinder 13 and an upper end thereof is connected to a drive shaft of a servomotor 15. With this structure, the upper and lower turrets are rotated to select a desired mold (upper mold and lower mold), the couplings 11 and 12 are fitted, and the servomotor 15 is driven. The worm wheel 3a is rotated via the driven shaft 10 and the worm shaft 5, and the upper die 4 is rotated to a desired angle, so that machining can be performed.

[0003]

In the case of the rotating mechanism having the above-mentioned structure, since the power transmission mechanism such as the worm shaft 5 and the bevel gears 6 and 7 is arranged on the center side of the turret,
The central part of the turret is occupied by the power transmission mechanism, and it is not possible to install a large number of index devices (four at most), and the number of dies that can be rotated is limited. Sometimes I had to rotate the mold to change it. Also, since the power is transmitted between the worm shaft and the driven shaft via the bevel gear, backlash of the bevel gear causes an error, which causes a gap between the upper mold and the lower mold, which results in a hole. Machining could not be performed accurately, and the means for fixing the worm was on the fixed frame side, so it was displaced due to vibration or the like.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, a turret punch for arranging a die along the outer circumference of a disc-shaped turret, rotating the turret to select a desired die, and positioning a work between the upper and lower dies to perform machining. In the press, the worm is arranged so as to mesh with a worm wheel provided in each mold, and one end of the worm is configured to be coaxially coupled with a drive shaft provided on the main body side. Also,
A lock mechanism is provided on the worm shaft of the worm to lock the worm when it is not coupled.

[0005]

[Operation] Next, the operation will be described. By using the above means, when the upper and lower turrets are rotated to select a desired mold, the worm also rotates simultaneously with each mold, and the worm is locked by the locking device so that the direction of the mold is fixed. Then, when the desired mold is selected and stopped, the drive shaft and worm shaft are located on the coaxial line, and when both shafts are fitted by the coupling, it becomes possible to rotate integrally and the rotational force is increased. It is transmitted, and the mold can be rotated at a predetermined angle.

[0006]

EXAMPLES Next, examples of the present invention will be described. Figure 1
2 is a plan view of the turret punch press equipped with the index device of the present invention, FIG. 2 is a side view showing the driving parts of the upper and lower index devices, FIG. 3 is a front view of the upper and lower index devices, and FIG. FIG. 5 is a perspective view, FIG. 5 is a front view, FIG. 6 is a side view, FIG. 7 is a sectional view taken along line XX in FIG. 5, and FIG. 8 is a plan sectional view showing a non-coupling state of a drive shaft and a worm shaft. FIG. 9 is a plan sectional view showing a coupling state of the drive shaft and the worm shaft.

The overall structure of the turret punch press P is shown in FIG.
As shown in FIG. 2, the center table 22 is arranged on the center of the front part of the main body frame 21, the side tables 23L and 23R are arranged on both sides of the center table 22, and the side tables 23L and 23R are connected to the front part on both sides. Carriage 24 is installed across and both side tables 23L and 23R
Is configured so that it can slide back and forth integrally, and a cross slide 25 is disposed on the rear surface of the carriage 24, and work holders 26, 26 for sandwiching a work such as a plate material are arranged at the rear portion of the cross slide 25. The work, which is provided and sandwiched by the work holders 26, 26, can be conveyed to the left and right arbitrary positions by sliding of the cross slide 25, and can be conveyed to the front and rear arbitrary positions by the forward and backward movement of the carriage 24.

At the rear of the center table 22, a disc-shaped lower turret 31 is rotatably arranged, and a large number of holders 33 for mounting a die (lower mold) are arranged along the outer circumference.
An upper frame 30 is provided above the rear portion of the center table 22 and an upper turret 32 is rotatably arranged. The upper turret 32 and the lower turret 31 have punches that match the die of the lower turret 31 along the outer circumference like the lower turret 31. Holders 34 for mounting upper dies are arranged to face each other, and the lower turret 3
1 and the upper turret 32 are simultaneously rotated to select a desired die and punch, the work is positioned between the die and the punch, and the ram 35 arranged on the front portion of the upper turret 32 is moved up and down. , The die is punched so that the work can be punched.

The holders 33 and 34 are constructed to be rotatable by the index device of the present invention. That is, each holder 33.3 on the turret
Worm wheel 33a.3 on the outer circumference of part of 4 ...
4a ... is formed, and the worm wheels 33a.3 are formed.
4a ... meshes with worms 36a, 37a, ... formed on the worm shafts 36, 37, respectively, and the worm shafts 36, 37. 2 and 3, the rotary drive mechanisms A and B are arranged on the outside of the turret, and the rotary drive mechanisms A and B are mounted on the front side of the turret, that is, on the lower turret side of the central axis of the ram 35. The rotary drive mechanism B is arranged on each side of the turret, and the power from the servomotor 40 is transmitted to the worm shafts 36a and 37a located below the ram 35 via the coupling portions of the rotary drive mechanisms A and B. It is transmitted and rotated so that it can be indexed. However,
A mold that does not need to be rotated, such as a circle, does not require an index device, but it can be mounted on a holder so that it can be processed with or without an index device.

As shown in FIG. 2, the servomotor 40, which is the source of rotational power for the index device, has a lower turret 3.
1 is fixed to the main body frame 21 at the rear part, and two pulleys are fixed on the drive shaft 40a of the servo motor 40,
A belt 41 is wound around one of the pulleys to transmit power to the lower rotary drive mechanism A, and the belt 42, the pulley on the relay unit C, and the belt 43 above the other pulleys on the drive shaft 40a. The rotary drive mechanism B is configured to be able to transmit the rotational force.

Since the rotary drive mechanisms A and B have substantially the same structure, the structure of the upper rotary drive mechanism B is shown in FIGS.
This will be described with reference to FIG. The cam plate 44 and the support bracket 45 are fixed to the upper frame 30.
The bearing parts 45a, 45b, ... project downwardly, the pivot shaft 46 is rotatably mounted horizontally between the bearing parts 45a, 45a, and the mounting bracket 3 is mounted between the bearing parts 45b, 45b.
9 is rotatably supported, and the support shaft 39a of the mounting bracket 39 and the pivot shaft 46 are arranged on the same axis. Then, pulleys 47 and 48 are fixedly mounted on the pivot shaft 46, the belt 43 is wound around the pulley 47, and a pulley 51 on a drive shaft 50 pivotally supported by the pulley 48 and a rotating case 49 described later. A belt 52 is wound in between so that the drive shaft 50 can be rotated by the rotation from the servo motor 40. Incidentally, the belt 5
2, 41, 42, and 43 are toothed belts to form timing belts so that slippage does not occur and the phases do not shift. It is also possible to use chains instead of belts and sprockets instead of pulleys. .

A rotating case 49 is attached to the mounting bracket 39 so that its position can be adjusted. As shown in FIG. 8, the rotating case 49 has a guide rod 53 which is parallel to the drive shaft 50. Support, cylinder 49 on the other side
a to accommodate the piston 54,
A more protruding piston rod 55 projects from the cylinder 49a, and a guide lever 56 is fixed to the piston rod 55 and the tip of the guide rod 53. A pipe-shaped coupling 57 is fitted into the other end of the guide lever 56, and the stay 57 holds the drive shaft 50 so that the coupling 57 can rotate but cannot come off. When the cylinder 49a penetrates and extends and contracts, the guide lever 56 is guided by the piston rod 55 and the guide rod 53 so that the guide lever 56 can slide on the drive shaft 50. A key groove is formed on each of the outer peripheral surface of the drive shaft 50 and the inner peripheral surface of the coupling 57, and the key 59 is inserted in the key groove so that the drive shaft can be slid even when the coupling 57 slides. 50 and coupling 5
I try not to run idle between 7.

When the cylinder, which will be described later, is extendedly coupled, the drive shaft 50 is arranged so that the end of the worm shaft 37 having the same diameter is located on the extension of the drive shaft 50 so that the shaft center is aligned, that is, the upper turret 32. When the upper mold is rotated and a desired upper mold is selected and the mold is rotated below the ram to rotate the mold, the worm 37a arranged on the side of the upper mold holder 34
The worm shaft 37 is located on an extension of the drive shaft 50.

On the other hand, a lock mechanism D is arranged at the end of the worm shaft 37, and the lock mechanism D is connected to the worm shaft 3.
A key 60 is fitted on the outer peripheral surface of the end portion of 7, and the worm shaft 37 is rotatably supported by a support body 61 in the tangential direction of the turret, and the support body 61 is fixed to the upper turret 32 for each holder 34. It is set up. Then, the bolt 62 is projected from the side surface of the support body 61 toward the rotating case 49 side,
2, a stopper 63 and a spring 64 are externally fitted, the stopper 63 is slidably externally fitted on the bolt 62, and is urged toward the rotating case 49 side by the spring 64, and the end of the stopper 63 on the worm shaft 37 side. A key groove 63a into which the key 60 is fitted is formed in the stopper 63, and the stopper 63 slides by the urging force of the sprocket 64 to fit the key 60 and rotate the worm shaft 37 except when the mold is rotated. It's locked so you don't. However, the key 60
Has the same shape as the cross section of the key 59 and has the same axial position, so that the key groove 57a of the coupling 57 can be fitted into the key 60 when transmitting a rotational force as described later. I have to.

As shown in FIGS. 4, 6 and 7, a cam follower 66 is projected from the end portion of the guide lever 56, and the cam follower 66 is opened in the cam plate 44. 44a, the cam hole 44a is opened in a V-shape, and when the cylinder 49a is expanded and contracted, the cam follower 66 slides along the cam hole 44a and the guide lever 56 slides left and right. It moves up and down at the same time as the movement.

That is, when the cylinder 49a is contracted, the drive shaft 50 and the worm shaft 37 are located on substantially the same line in a plan view as shown in FIG.
Since 9 is rotated upward, it is not parallel and collinear in a front view, and even if the upper turret 32 is rotated, the drive shaft 50 and the worm shaft 37 do not interfere with each other, and the worm shaft 37 and the worm shaft 37 respectively stop. Since it cannot be rotated by fitting with the key 60, the upper mold holder 34 cannot be rotated and is maintained at a predetermined position.

The upper turret 32 and the lower turret 31
Are simultaneously rotated, the desired mold is selected and the ram 35
When stopped at a lower position, drilling is possible, but when drilling is performed by changing the direction of the mold, the cylinder 49a is extended and the guide lever 56 moves the guide rod 53 and the drive shaft 50. The cam follower 66 slides along the cam hole 44a at the same time, the rotating case 49 rotates about the support shaft 39a and descends, and the drive shaft 50 and the worm shaft 37 move. Located on the same axis,
As shown in FIG. 9, the guide lever 56 stops the stopper 63.
When the key groove 63a is pushed out of the key 60 to release the lock, the coupling 57 slides and the key groove 57a of the coupling 57 fits into the key 60 so that the drive shaft 50 and the worm shaft 37 are separated. It becomes possible to rotate integrally.

When the servomotor 40 is driven, the drive shaft 50 is rotated via the belts 42 and 43, the pulleys 47 and 48, the belt 52 and the pulley 51, and the coupling 57 is extended on the drive shaft 50. The worm shaft 37 connected via the worm is rotated, the worm wheel 34a of the holder 34 is rotated, and the direction of the upper mold is changed. At the same time, also in the lower mold, the holder 33 is also rotated from the rotary drive mechanism A via the belt 41 in the same manner as described above, the upper mold and the lower mold can be aligned and processed, and the other molds on the turret also rotate. You can do it. Sensors 68 and 69 are provided on the rotating case 49 and the upper frame 30, respectively, and are connected to a control circuit so that the contracted position and the expanded position of the guide lever 56 can be detected. The turret can be rotated only occasionally, and the holder can be rotated only when the guide lever 56 is in the extended position so that they do not interfere with each other or cause a failure or damage.

[0019]

Since the present invention is constructed as described above, it has the following effects. That is, since it is configured as in claim 1, only the worm shaft for rotating the holder needs to be arranged on the side portion of the mold holder arranged in the turret, and the structure is simple and compact. , It became possible to dispose a worm shaft in each holder, and it became possible to dispose much more rotatable dies than before, and it was possible to increase the types of processing. Of. Further, since the worm shaft is connected to the rotary drive mechanism via the coupling, the error due to backlash can be reduced, and only one drive mechanism for rotating the mold is required, so the cost can be reduced. It was.

Further, according to the second aspect of the invention, all the molds are positioned on the turret in a locked state, and the worm shaft cannot be rotated by the lock mechanism unless the worm shaft is connected to the rotary drive mechanism, and positioning is performed. It became accurate and the processing accuracy could be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a turret punch press equipped with the index device of the present invention.

FIG. 2 is a side view showing a driving unit of upper and lower index devices.

FIG. 3 is a front view of the upper and lower index devices.

FIG. 4 is a perspective view of an upper index device.

FIG. 5 is a front view of the same.

FIG. 6 is a side view of the same.

7 is a cross-sectional view taken along the line XX in FIG.

FIG. 8 is a plan sectional view showing a non-coupling state of a drive shaft and a worm shaft.

FIG. 9 is a plan sectional view showing a coupling state of a drive shaft and a worm shaft.

FIG. 10 is a side sectional view of a conventional index device.

[Explanation of symbols]

 P Punch Press 31 Lower Turret 32 Upper Turret 33/34 Holder 33a / 34a Worm Wheel 36/37 Worm Shaft 36a / 37a Worm 50 Drive Shaft 57 Coupling 60 Key 63 Stopper

Claims (2)

[Claims] 1. A mold is arranged along the outer periphery of a disk-shaped turret, the turret is rotated to select a desired mold, and a work is positioned between the upper and lower molds for machining. In a turret punch press, the index of the punch tool is constructed such that the worm is arranged in mesh with the worm wheel provided in each mold, and one end of the worm can be coupled coaxially with the drive shaft provided on the main body side. apparatus. 2. An index device for a punch tool, comprising a lock mechanism for locking the worm shaft according to claim 1 when the worm shaft is not coupled.