JPH0819826A - Turret punch press - Google Patents

Abstract

PURPOSE:To provide a turret punch press by which the replacement operations of punch and die can be easily performed and the automation of the replacement operation of the die is easy. CONSTITUTION:In a turret punch press, an upper turret 3 is formed smaller than a lower turret 6, plural dies are held by the upper and the lower turrets 3 and 6, and the upper turret 3 is eccentrically arranged on the lower turret 6. On the other hand, an arbitrary one out of plural upper dies 4 is freely made for positioning in an operation position, and the only lower die out of plural lower dies, which corresponds to the upper die 4 existing in the operation position, is freely made for positioning just under an upper die 4 existing in the operation position. When positioning required both dies, it is set so that at least one of the other dies of the lower turret 6, is projected from the upper turret 3 and is exposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret punch press which can easily replace a mold, especially a lower mold.

FIG. 5 shows a side view of a conventional turret punch press, and FIGS. 6 and 7 show layouts of an upper turret and a lower turret. The layout is as follows. That is, in the figure, 1 is a hydraulic cylinder which is a driving source of the pressing force, 2 is a drive shaft for driving the upper turret 3, 4 is a punch which is an upper die attached to the upper turret 3,
5 is a ram, 6 is a lower turret, 7 is a die holder attached to the lower turret 6 via a clamp 8, 9 is a die which is a lower mold held by the die holder 7, and 10 is a work W. A moving carriage, 11 is a frame, 12 is a servomotor for rotationally driving the upper turret 3 and the lower turret 6,
Reference numeral 13 is a drive shaft of the servo motor 12.

In the above turret punch press, a work W is inserted between the upper turret 3 and the lower turret 6, and the hydraulic cylinder 1 is driven to transmit a pressing force to the punch 4 via the ram 5, The work W is processed by a pressing force. In the case of punching, the convex portion of the punch 4 penetrates into the hole of the die 9 for processing.

[0004] In the above processing, the punch 4
And the center position of the die 9 must match, and further,
When a square punch is performed, the angles of the punch 4 and the die 9 must also match. Therefore, in the turret punch press described above, the punch 4 and the die 9 are arranged at the same position of the upper turret 2 and the lower turret 6 so that they always face each other. The concentricity and angle of the die 9 are guaranteed.

However, in the turret punch press described above, the removal of the die 9 is very inconvenient. The punch 4 is simply inserted into the upper turret 3 and has a space to be pulled out upward, so that it can be easily removed, but the die 9 is not easily removed. That is, first, the bolts of the die holder clamp 8 holding the die holder 7 must be loosened, separated from the lower turret 6, pulled out, and then the die 9 housed inside the die holder 7 must be removed. .

A complicated mechanism is required to automate the operation of removing the die 9 described above, so that automation has not progressed at present. However, the demand of the user is toward arranging as many punches 4 and dies 9 as possible on the turret so as to reduce the frequency of die replacement work.

In order to improve the prior art as described above,
A turret punch press described in Japanese Utility Model Laid-Open No. 60-146531 is proposed. In this invention, a plurality of upper and lower molds are placed on upper and lower mold holding members, respectively, and any one of the plurality of upper molds is provided at a work position so that it can be positioned freely. Of the plurality of lower molds, only the lower mold corresponding to the upper mold in the working position is provided directly below the upper mold in the working position, and the lower mold other than the lower mold is positioned. The mold is provided outside the lower part of the upper mold holding member.

However, in the above-mentioned proposal, when the mold is replaced, the punch (upper mold) and the die (lower mold) must be removed at different places. There is no particular problem with a turret punch press of the type in which the work is inserted from the side of the C-type frame, but a turret punch press of the type in which the carriage is placed behind the C-type frame. Then, there is a problem in that the work points are different from each other, which is a large factor that deteriorates the operability.

Further, in the above-mentioned proposal, since the upper and lower turrets are partially overlapped with each other, the lower turret projects toward the carriage side, so that it interferes with a ball screw for driving the carriage. There is also a problem that it is easy to do and there is no choice but to be restricted in terms of layout.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and has made it possible to facilitate the work of exchanging punches and dies, and to automate the work of exchanging dies, which was conventionally regarded as having poor workability. It is an object of the present invention to provide a turret punch press that is easy to use.

[0011]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems. The structure is such that, in a turret punch press, the upper turret is formed smaller than the lower turret, and the upper and lower turrets are formed. While holding a plurality of dies and arranging the upper turret on the lower turret in an eccentric manner, any one of the plurality of upper dies can be positioned at a work position, and Among them, only the lower mold corresponding to the upper mold in the working position can be positioned directly below the upper mold in the working position, and when the required two molds are positioned, At least one of the molds is exposed from the upper turret.

[0012]

According to the turret punch press of the present invention, any one of the upper dies held by the upper turret is positioned at the working position, and the lower die corresponding to the upper die among the lower dies held by the lower turret. When the mold is positioned at the working position, at least one of the other lower dies protrudes from the upper turret and is exposed. Therefore, if the lower mold to be replaced is exposed, the lower mold is exposed. Is extremely easy to replace, and the upper mold can be easily removed from the upper turret as in the prior art, so that the mold can be easily replaced as a whole. In addition, since the mold can be easily replaced as described above, the replacement operation can be easily automated.

[0013]

Embodiments of the present invention will now be described with reference to the drawings.
FIG. 1 is a side view of a turret punch press as an example of the present invention,
2 is a plan view showing a layout example of an upper turret according to the present invention, FIG. 3 is a plan view showing a layout example of a lower turret, FIG. 4 is a plan view showing a state where the turrets of FIG. 2 and FIG. 5 is a side view of a conventional turret punch press, FIG. 6 is a plan view of a conventional upper turret, and FIG. 7 is a plan view of a conventional lower turret.

In FIG. 1, the same reference numerals as those of the conventional turret punch press shown in FIG.
The difference from the conventional turret punch press is that the upper turret 3 is smaller than the lower turret 6, and the die holder 7 and the die holder clamp 8 used for holding the die 9 in the conventional lower turret 6 are unnecessary in the present invention. That is, the die 9 is directly held in the die holding hole of the lower turret 6. In the conventional turret punch press, the upper turret 3 is driven by the drive shaft 2,
In this embodiment, the drive shaft is not provided and the upper turret 3
A driving unit 21 for driving the turret 3 is provided, and the driving unit 21 rotates the outer circumference of the upper turret 3 as a guide. Of course, the upper turret 3 may be rotated by providing the drive shaft 2 as in the conventional case, but if the upper turret 3 is driven as described above without providing the drive shaft 2, the upper turret 3 can be rotated. The punches 4 can be arranged in a high density on the sheet 3.

The processing by the punch 4 and the die 9 in the present invention is the same as the conventional one, but the upper turret 3 is
Since it is smaller and is eccentrically arranged above the lower turret 6, it seems at first glance that it is difficult to make both turrets 3 and 6 make the same movement. However, considering the angle as a reference, it is not difficult to control. When the servo motor 12 rotates, both turrets naturally rotate, so if the gears are set so that the upper and lower turrets 3 and 6 rotate at the same angle, the position of the mold directly below the ram 5 will be It is possible to put it out accurately.

When the die 9 is to be replaced after the machining, the upper turret 3 and the lower turret 6 are rotated to position the die 9 to be replaced outside the upper turret 3, and the die 9 is moved upward. Can be easily removed from the lower turret 6 without using a tool.

Further, in the past, the die 9 was removed from the die holder when the wear or pitching of the die 9 was checked or cleaning was performed, but in the present invention, this is not necessary, and therefore maintenance work is simple. Can be done

Furthermore, since the die holder is not required, not only can the cost of the turret punch press be reduced, including the unit cost and the number of mounting steps, but also the position of the die can be reduced by removing the die from the die holder. However, such unstable factors are eliminated, and the accuracy is improved.

On the other hand, in the conventional turret punch press, it is difficult to automatically replace the molds on the turrets 3 and 6, and it is particularly difficult to replace the die 9 attached to the lower turret 6. However, according to the present invention, the die 9 can be removed from the lower turret 6 by merely pushing it up from below, so that the exchange of the die 9 can be easily automated.

[0020]

The present invention is as described above, and the upper turret is smaller than the lower turret and is eccentrically arranged on the lower turret, so that the lower turret does not use a die holder and the required two molds are used. That is, when the punch and the die are positioned, at least one of the other dies of the lower turret protrudes from the upper turret so as to be exposed. Automation can be achieved.

[Brief description of drawings]

FIG. 1 is a side view of a turret punch press according to an example of the present invention.

FIG. 2 is a plan view showing a layout example of an upper turret according to the present invention.

FIG. 3 is a plan view showing a layout example of a lower turret according to the present invention.

FIG. 4 is a plan view showing a state where the turrets of FIGS. 2 and 3 are superimposed.

FIG. 5 is a side view of a conventional turret punch press.

FIG. 6 is a plan view of a conventional upper turret.

FIG. 7 is a plan view of a conventional lower turret.

[Explanation of symbols]

 1 Hydraulic cylinder 21 Upper turret drive unit 3 Upper turret 4 Punch (upper mold) 5 Ram 6 Lower turret 9 Die (lower mold) 10 Carriage 11 Frame 12 Servo motor 13 Servo motor drive Axis W work

Claims (1)

[Claims] 1. In a turret punch press, an upper turret is formed smaller than a lower turret, a plurality of molds are held by the upper and lower turrets, and the upper turret is eccentrically arranged on the lower turret, while the plurality of turrets are arranged. Arbitrary one of the upper molds can be positioned at the working position, and only the lower mold corresponding to the upper mold at the working position among the plurality of lower molds is at the working position. A turret punch characterized in that the turret punch can be positioned directly below the mold and at least one of the other molds of the lower turret protrudes from the upper turret and is exposed when the required molds are positioned. press.