JPH07164072A - Index device for punch press - Google Patents

Abstract

PURPOSE:To precisely index and improve a power transmission efficiency, further to make a power transmission mechanism simple by constituting an index device in a small size so as to make the whole compact. CONSTITUTION:A drive shaft is oscillated as linking with the coupling motion between a drive shaft 50 and worm shaft 37 and the oscillation is executed by the cam mechanism consisting of a can plate 44 and cam follower 66. Also, a pulley 51 is arranged on the drive shaft 50, a pulley 48 is arranged on the shaft 46 at oscillation fulcrum, a timing belt 52 is wound between both pulleys, executing indexing drive through the shaft on the oscillation fulcrum from a drive source, all the drive axis, pulley axis on the oscillation fulcrum, rotating axis of drive source, intermediate pulley are placed in parallel, the power transmission is done by belt drive.

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. Techniques for doing so are known. As shown in FIG. 9, the rotation 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. Holders 3 3 which are rotatably supported and support the upper molds 4, 4 ... along the outer circumference of the turret 2.
... is provided, a worm wheel 3a is formed on the upper portion of the holder 3, a worm formed at one end of the worm shaft 5 is meshed with the worm wheel 3a, and a bevel gear 6 is fixed to the other end of the worm shaft 5. Bevel gear 6
A bevel gear 7 is meshed with the bevel gear 7, and the bevel gear 7 is fixed to a driven shaft 10 which is rotatably supported in the vertical direction. A coupling 12 is fixed to the upper end of the driven shaft 10 and is fitted to the coupling 12. A mating coupling 11 is fixed to the lower end of the drive shaft 9, and the upper part of the drive shaft 9 is the cylinder 1.
The piston 14 is formed in 3 and the upper end is the servo motor 1
5 is connected to the drive shaft. With this structure, the upper and lower turrets are rotated to select a desired mold (upper mold and lower mold), and the cylinder 11 is used to couple the couplings 11 and 12.
And the worm wheel 3a is rotated from the drive shaft 9 via the driven shaft 10 and the worm shaft 5 by the driving force from the servo motor 15, and the upper die 4 is rotated to a desired angle. It will be indexed.

[0003]

In the case of the index device having the above-described structure, the worm shaft 5 and the bevel gears 6 and 7 are provided with a power transmission mechanism on the center side of the turret, and the driving shaft for indexing and the driven shaft are driven. The coupling operation with the shaft was performed by the cylinder in the vertical direction, and the horizontal transmission direction was changed via the bevel gear, so the transmission mechanism was long in the horizontal and vertical directions, and the central portion of the turret transmitted power. Due to the occupation of the mechanism, a large number of index devices could not be provided (four at most), and the number of molds that could be rotated was limited, so that it was not possible to increase the number of types of punching. Further, since the worm shaft, the bevel gear and the like are arranged on the turret, the number of parts is large and the number of assembling steps is also increased.

[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, the worm shaft is arranged outside the die arranged along the outer periphery of the turret, the drive shaft is configured to be coaxially coupled, and the die is rotatable. The drive shaft is oscillated in conjunction with the coupling operation between the shaft and the worm shaft, the oscillating is performed by a cam mechanism, and a pulley is provided on the drive shaft, and a pulley is attached to the shaft on the oscillating fulcrum. A timing belt is wound between both pulleys and is configured to be index-driven from the drive source via the shaft on the swing fulcrum. Also, the drive shaft, the pulley shaft on the swing fulcrum, and the rotation of the drive source The shaft and the intermediate pulley shaft between the drive source and the swing fulcrum are all arranged in parallel, and power is transmitted by belt drive.

[0005]

[Operation] Next, the operation will be described. By using the above means, by rotating the upper and lower turrets to select the desired mold and extending the cylinder for driving the coupling, the coupling part moves along the long hole of the cam plate,
At the same time the drive shaft is swung around the swing shaft,
The coupling moves to the worm shaft side, the drive shaft and the worm shaft are located on the coaxial line, both shafts are fitted by the coupling, and they can rotate integrally. Is transmitted from the pulley on the swing shaft to the pulley on the drive shaft via the timing belt, and the mold is rotated at a predetermined angle by the rotation of the drive shaft to be indexed.

[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. 5 is a front view, FIG. 6 is a side view, FIG. 7 is a side view, FIG. 7 is a cross-sectional view taken along the line XX in FIG. 5, and FIG. 8 is a plan cross-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 a rear portion of the center table 22, and an upper turret 32 is rotatably arranged so as to face the lower turret 31, and the upper turret 32 also has a lower turret 31.
Similarly, holders 34 for mounting punches (upper dies) that match the dies of the lower turret 31 are arranged along the outer periphery so as to face each other, and the lower turret 31 and the upper turret 32 are simultaneously rotated to obtain a desired die. And a punch are selected, the work is positioned between the die and the punch, and the ram 35 arranged on the front part of the upper turret 32 is moved up and down, whereby the die can be punched and the work can be punched. I am trying.

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 servo motor 40, which is the rotation driving source for the index device, is 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 to serve as a swing fulcrum of a drive shaft 50 described later. And
Pulleys 47 and 48 are fixed to the pivot shaft 46, the belt 43 is wound around the pulley 47, and the pulley 48
A belt 52 is wound around a pulley 51 on a drive shaft 50 that is pivotally supported by a rotating case 49, which will be described later, so that the drive shaft 50 can be rotated by the rotation from the servo motor 40. The belts 52, 41, 42
Reference numeral 43 denotes a timing belt composed of a toothed belt to prevent slippage and phase shift. It is also possible to use a chain instead of the belt and a sprocket instead of the pulley.

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.

Then, when coupling a cylinder, which will be described later, is extended so that the end of the worm shaft 37 having the same diameter is positioned so that the shaft center is aligned with the extension of the drive shaft 50, that is, the upper turret 32 is arranged. When the upper mold is rotated to select a desired upper mold and the mold is rotated and indexed by rotating the mold, the worm shaft 37 of the worm 37a arranged on the side of the holder 34 of the upper mold extends the drive shaft 50. It is configured to be located above.

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.

A cam mechanism is formed between the end portion of the guide lever 56 and the cam plate 44, as shown in FIGS.
As shown in FIG. 5, a cam follower 66 is projected from the end portion of the guide lever 56, and the cam follower 66 is fitted into a cam hole 44 a opened in the cam plate 44, and the cam hole 44 a has a “V” shape. Is opened in the cylinder 49
When "a" is expanded or contracted, the cam follower 66 will move into the cam hole 4
By sliding along 4a, the guide lever 56 slides left and right, and simultaneously swings up and down.

That is, when the cylinder 49a is contracted, the rotating case 49 is rotated upward, and the drive shaft 50 is separated from the worm shaft 37 and escapes.
The drive shaft 50 is located above the support shaft 39a and the pivot shaft 46, which are the swing fulcrums, so that the drive shaft 50 and the worm shaft 37 can rotate the upper turret 32 without interference. Each worm shaft 37 is locked by the stopper 63 fitted to the key 60, cannot rotate, 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 it is stopped below, hole punching is possible, but when performing punching by changing the direction of the die and performing indexing, the cylinder 49a is extended and the guide lever 56 moves the guide rod 53, The cam follower 66 slides along the drive shaft 50, and at the same time, the cam follower 66 moves the cam hole 4 of the cam 44.
By sliding along 4a, the shape of the cam hole 44a causes sliding in the extending direction at the beginning, descending at the same time as the sliding from the middle, and linear movement is made at the terminal end for coupling.

That is, the rotating case 49 swings around the support shaft 39a and descends until the drive shaft 50 and the worm shaft 37 are positioned on the same axis. Incidentally, since the pulleys 48 and 51 are connected by the belt 52 at the time of this swing, the drive shaft 50 rotates, but since the coupling is always performed in the lowered position, there is no phase shift. Then, after descending, as shown in FIG. 8, the guide lever 56 slides in the extension direction to push the stopper 63, the key groove 63a comes out of the key 60 and the lock is released, and at the same time, the coupling 57 slides. Then, the key groove 57a of the coupling 57 is fitted into the key 60 so that the drive shaft 50 and the worm shaft 37 can 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. 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. Only when the turret can be rotated, 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 troubles or damages. Before changing the mold, reverse the servo motor 40 to return it to its original position.
The keys 60 of the worm shaft 37 on the turret are all oriented in the same direction.

The rotary drive mechanism A in the lower die cannot be provided above the lower turret 31, so that FIG.
As shown in FIG. 3, a support shaft 71, which is vertically provided on a side portion of the lower turret 31 and serves as a swing fulcrum, is arranged at a lower portion, and the swing direction is a front-back direction, and drives the servo motor 40. Then, the worm wheel 33a is also rotated from the rotary drive mechanism A via the belt 41 in the same manner as described above, the upper die and the lower die can be aligned and processed, and the other dies on the turret can be similarly rotated.

[0021]

Since the present invention is constructed as described above, it has the following effects. That is, since it is configured as in claim 1, in the non-coupling state without indexing, the drive shaft for rotationally driving the worm shaft arranged in the turret can be released in the direction away from the mold, and the index drive side mechanism It was possible to place it closer to the, and it was possible to make the whole compact. Further, since the drive source for coupling can be used also as the swing drive source, it is not necessary to provide a new drive source only by adding the cam mechanism.

Further, according to the second aspect of the present invention, even if the drive shaft is swung, the drive shaft is connected to the shaft for transmitting power on the swing fulcrum shaft through the timing belt, so that the cup is connected. During the ring, the indexing position does not change, it can be reliably coupled with the worm shaft, and the index can be accurate.

Further, according to the third aspect of the invention, by making all the rotary shafts for power transmission parallel, the rotation directions are all in the same direction, the efficiency of power transmission can be improved, and the power transmission mechanism can be simplified. it can.

[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 coupling state of a drive shaft and a worm shaft.

FIG. 9 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 36/37 Worm shaft 39a Support shaft 44 Cam plate 46 Pivot shaft 48/51 Pulley 50 Drive shaft 52 Belt 57 Coupling 66 Cam follower

Claims (3)

[Claims] 1. An indexing device for a punch tool, wherein a worm shaft is arranged outside a die arranged along the outer periphery of a turret, and a drive shaft is coaxially coupled so that the die can be rotated. 2. A punch tool indexing device according to claim 1, wherein the drive shaft is rocked in conjunction with the coupling operation between the drive shaft and the worm shaft, and the rocking is performed by a cam mechanism. 2. A pulley is provided on the drive shaft according to claim 1, a pulley is provided on the shaft on the rocking fulcrum, and a timing belt is wound between both pulleys so that the shaft on the rocking fulcrum is moved from the drive source. Indexing device for punch tools, characterized by being index driven through. 3. The index device for a punch tool according to claim 2, wherein the drive shaft, the pulley shaft on the swing fulcrum, the rotary shaft of the drive source, and the intermediate pulley shaft between the drive source and the swing fulcrum. An indexing device for punch tools, characterized in that all are arranged in parallel and configured to transmit power by belt drive.