JPH0123632Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a mold rotation device for a punch press machine, and in particular, the clutch piece of the drive shaft on the frame side is separated from the clutch piece of the driven shaft that rotates the mold holder. This invention relates to a mold rotating device for a punch press machine that prevents a mold holder from rotating unduly due to vibrations during pressing when separated.

[Conventional technology]

In a punch press machine that punches holes in workpieces such as steel plates, if the mold supported by the turret is configured so that it can rotate relative to the turret, the same mold can be used to create many types of holes in different directions. Being able to drill holes is very convenient. Therefore, a plurality of mold holders for mounting molds on the circumference of a turret rotatably supported by a frame are provided, each rotatably provided, and a driven shaft for rotating these mold holders is respectively provided. A mold rotation device for a punch press machine is already known in which a drive shaft that engages and disengages from the driven shaft via a clutch piece is provided so as to be movable forward and backward with respect to the driven shaft (Japanese Patent Laid-Open No. 58-53333). . According to this, the male and female molds facing each other can be rotated on both turrets without passing the drive shaft between the upper and lower turrets, and therefore the workpiece can be rotated between the upper and lower turrets. This means that a so-called deep punch press machine that can be inserted deeply can be easily manufactured.

[Problem that the invention attempts to solve]

However, in the rotating device of a conventional punch press machine, when pressing or rotating the turret, the drive shaft 1 is moved back from the driven shaft 2 as shown in FIG. Since the engagement was released, there was a risk that the mold holder (not shown) connected to the driven shaft 2 would rotate by itself due to vibrations during pressing or the like. If the mold holder rotates by itself, the clutch pieces 3 and 4 will not mesh well when the clutch is engaged, or an error will occur in the amount of rotation angle by the servo motor thereafter. Accurate drilling becomes difficult.

[Purpose of the invention] The present invention was made to solve the above-mentioned problems of the conventional technology.The purpose of the invention is to prevent the mold holder from rotating when the clutch is disengaged, thereby improving machining accuracy. The purpose of the present invention is to provide a mold rotation device for a punch press machine.

[Summary of the idea]

In order to achieve the above object, the present invention forms a flange on the clutch piece on the driven shaft side, and provides a brake plate on the turret that is urged in the backward direction of the drive shaft and press-fitted to the flange. By providing a brake release member on the side clutch piece that detaches the brake plate from the flange when it moves forward, the brake plate presses against the flange when the clutch is disengaged, fixing the driven shaft and preventing it from being pressed during pressing. This prevents the mold holder from rotating without permission due to vibrations such as.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 1, 5 and 6 are upper and lower frames of the punch press machine, and these frames 5 and 6 have upper and lower turrets 7 and 8 facing each other with a predetermined gap in between.
are rotatably supported via bearings 9 and 10, respectively. Turrets 7 and 8 have large diameter gears 11 and 1.
The turrets 7 and 8 are rotated by a drive chain (not shown) that is wound around these gears 11 and 12.

The upper and lower turrets 7 and 8 have male and female molds 13 and 1.
A large number of mold holders 15, 16 holding 4 are arranged on the same circumference, and these mold holders 15, 1
6 is rotatably attached to turrets 7 and 8, respectively.

A ram 17 is provided on one side of the upper frame 5 to grip and punch the upper mold 13. still,
The illustrated ram 17 has two gripping members 1 aligned in the radial direction so as to be able to grip a mold (not shown) disposed on the upper turret 7 in a radially displaced manner.
8, 19, and these gripping members 1 are rotated.
You can select either one of 8 and 19.

As a device for rotating the molds 13, 14 located on the ram 17, a driven shaft 20 for rotating the mold holders 15, 16 is provided in the upper and lower turrets 7, 8 for each mold holder 15, 16, and Clutch pieces 21, 2 are attached to the driven shafts 20 of the mold holders 15, 16 located on the rams 17 in the frames 5, 6.
A pair of upper and lower drive shafts 23 that engage and disengage via 2 are provided so as to be movable forward and backward relative to the driven shaft 20. still,
Since the upper and lower mold rotating devices have substantially the same configuration, only the upper one will be specifically explained, and the lower one will be given the same reference numerals and the explanation will be omitted.
That is, the upper driven shaft 20 is mounted on the bearing 2 while standing up on the gear box 24 attached to the upper turret 7.
A clutch piece 22 is provided at the tip of the driven shaft 20 facing the upper frame 5.
is installed. Further, one end of an interlocking shaft 28 is connected to the driven shaft 20 via bevel gears 26 and 27 within the gearbox 24, and a worm (not shown) formed at the other end of the interlocking shaft 28 is formed on the upper mold holder 15. It is meshed and connected to the worm wheel 29.

On the other hand, near the ram 17 on the upper frame 5 is a cylinder 30 that also serves as a motor mount.
is installed in an upright position, and a servo motor 32 with a shaft 31 facing downward is installed at the upper end of the cylinder 30. As shown in Fig. 2, the servo motor 3
A cylindrical member 34 with a key groove 33 cut in the inner surface is attached to the shaft 31 of No. 2, and the upper end of the drive shaft 31 is slidable only in the axial direction by a key 35 inside the cylindrical member 34. is inserted into.

Inside the cylinder 30 is a flange-shaped piston portion 3.
A piston rod 37 having a piston rod 36 is inserted into the fluid chamber 38 so as to be movable back and forth with its piston portion 36 positioned within the fluid chamber 38. The piston rod 37 has a shaft hole 39 into which the cylindrical member 34 and the drive shaft 23 can be loosely inserted.
A drive shaft 2 is formed in this shaft hole 39.
3 is rotatably supported via a bearing 40.

A clutch piece 21 that engages with a clutch piece 22 of the driven shaft 20 is attached to the lower end of the drive shaft 23. The clutch piece 21 of the drive shaft 23 is connected to the oil chamber 38.
The working fluid is supplied and discharged through ports 41 and 42 communicating with the piston rod 37, and the drive shaft 23 is integrally connected to the piston rod 37.
By advancing (lowering) the clutch piece 22 of the driven shaft 20, it engages with the clutch piece 22 of the driven shaft 20, and by retreating (raising) it disengages.

In the above configuration, the present invention forms a flange 43 on the clutch piece 22 on the driven shaft side as shown in FIGS. ) has a driven shaft 20
The brake plate 44 is pressed and biased from the turret side to fix the brake plate 44, and when the clutch is engaged (both clutch pieces 21 and 22 are engaged), the brake plate 44 is released from the flange 43. A feature is that a release member 45 is provided on the clutch piece 21 on the drive shaft side. The brake plate 44 is formed into a ring shape, and is loosely fitted around the outer periphery of the clutch piece 22 on the driven shaft side, which is formed into a cylindrical shape. A plurality of support rods 46 are mounted upright inside the box 24 on the turret 7, and a coil spring 47 is wound around the support rods 46 for pressing the brake plate 44 against the flange 43.

The brake release member 45 is made of a cylindrical body surrounding the outer periphery of the clutch piece 21 on the drive shaft side, and the base end of the cylindrical body is attached to the lower end of the piston rod 37.

Next, we will discuss the effect.

When rotating the turrets 7, 8 in order to index the desired molds 13, 14 under the ram 17, the drive shaft 2
3 from the driven shaft 20 to disengage the clutch. When the clutch is disengaged, the brake plate 44 is pressed against the flange 43 on the driven shaft side clutch piece 22 by the spring pressure of the coil spring 47, as shown in FIG.
0 is fixed. In this case, since all the driven shafts 20 on the turrets 7 and 8 are fixed, the mold holders 15 and 16 will not rotate freely due to vibrations caused by the rotation of the turrets 7 and 8. do not have.

Once the desired molds 13, 14 have been indexed and the turrets 7, 8 have stopped, the punch press operation begins. The mold holders 15 and 16 do not rotate by themselves even with this impact during pressing.

When rotating the molds 13 and 14 by a predetermined angle, fluid is first supplied from the port 41 to extend the piston rod 37 of the cylinder 30, and the drive shaft 2
3, the clutch piece 21 at the tip thereof is engaged with the clutch piece 22 of the driven shaft 20. As the piston rod 37 expands, the brake release member 45 also moves forward and comes into contact with the brake plate 44, which is further pushed against the spring pressure of the coil spring 47 and separated from the flange 43. Therefore,
Since the brake of the driven shaft 20 is released at the same time as the clutch is engaged, the driving force is transferred from the drive shaft 23 to the clutch pieces 21 and 2 by the drive of the servo motor 32.
2 to the driven shaft 20, and further the driven shaft 20
from the mold holders 15, 16 via the interlocking shaft 28.
, and the molds 13 and 14 can be rotated by a predetermined angle. When the clutch is engaged, the driven shaft 20 will not rotate freely due to the impact during pressing.

In this way, it is possible to prevent the mold holders 15 and 16 from rotating freely due to vibrations during pressing, etc., so the rotation of the molds 13 and 14 becomes accurate.
Machining accuracy will be improved.

[Effect of idea]

In summary, the present invention exhibits the following excellent effects.

(1) When the clutch is disengaged, the brake plate can be crimped to the flange formed on the clutch piece on the driven shaft side to fix the driven shaft.
It is possible to prevent the mold holder from rotating without permission due to vibrations during pressing.

(2) Therefore, the rotation of the mold becomes accurate and the machining accuracy improves.

(3) Since the structure is simple, manufacturing and maintenance are easy.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of a mold rotating device for a punch press machine according to the present invention, Fig. 2 is an enlarged cross-sectional view of a main part showing the operation of the device, and Fig. 3 is a perspective view of the main part. 4 are sectional views of essential parts of the conventional device. In the figure, 5 and 6 are frames, 7 and 8 are turrets,
5 and 16 are mold holders, 20 is a driven shaft, 21,
22 is a clutch piece, 23 is a drive shaft, 43 is a flange, 44 is a brake plate, and 45 is a brake release member.

Claims (1)

[Scope of utility model registration request] A plurality of mold holders are rotatably provided on the circumference of a turret rotatably supported by a frame, and driven shafts for rotating these mold holders are respectively provided, and a clutch piece is connected to the driven shafts in the frame. In a die rotation device for a punchless machine in which a drive shaft that engages and disengages with the drive shaft is provided so as to be able to move forward and backward with respect to the driven shaft, a flange is formed on the clutch piece on the driven shaft side and the drive shaft is biased in the backward direction from the turret side. A mold rotation device for a punch press machine, characterized in that a brake plate is loosely fitted to a flange and a brake release member is provided on a clutch piece on the drive shaft side to detach the brake plate from the flange when the clutch moves forward. .