JPH06328168A - Device for clamping changing for material to be worked in turret punch press - Google Patents

Abstract

PURPOSE:To easily perform clamping change by providing an ascending and descending means of pads to lift up a material to be worked up to the height able to move a clamper at the time of changing in clamping the material to be worked with the command of a controller in a pair of mechanisms for holding the material to be worked provided on positions without contact with a turret. CONSTITUTION:The device is composed of a pair of material to be worked holding mechanisms 10 which is arranged on positions without contact with a turret 2 on an axial line passing a blanking position (a) on the center line of a body frame 1 in a longitudinal direction and crossed orthogonally to the center line of a body frame 1 in a material to be worked feeding side of the turret, and a controller (to be incorporated in an operation controlling part of the turret 2) to electrically control the action of these material to be worked protecting mechanisms. The means 10 is provided with the ascending and descending mechanisms of pads to lift up the material to be worked up to the height able to move the clamper at the time of changing in clamping the material to be worked with the command of the controller. Therefore, the clamping can be changed without moving the material to be worked at the time of changing in clamping the material to be worked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work material re-gripping device in a turret punch press which can efficiently re- grip even a work material having a narrow width.

[0002]

2. Description of the Related Art Conventionally, a turret punch press is shown in FIG.
As shown in (a) and (b), the work material pressing mechanism 10 'is provided on both sides of the punching press position a of the turret 2 so as not to hinder the rotation of the turret 2, and the clamper 5 for the work material W is provided. The processed material W can be temporarily held at the time of re-grabbing. Then, in the pressing mechanism 10 'for the processed material, the pad 12' having the die upper surface and the receiving surface of the lower turret 2a arranged on the same plane is fixed on the frame, and is vertically movable above the pad 12 '. The piece 17 'is arranged,
Presser piece 1 when gripping the workpiece W with the clamper 5
7'is lowered so that the processed material W is sandwiched by the pad 12 '.

The processed material W is usually two clampers 5.
The side opposite to the turret 2 is gripped by and is moved back and forth and left and right with respect to the punching press position a, and the required processing is performed. In the portion fed into the turret 2, the processed material W is moved in contact with the upper surface of the die of the lower turret 2a. When the gripping position of the processed material W by the clamper 5 is changed, the gripping of the clamper 5 is released and the clamper 5 is moved after the processed material W is held by the processing material pressing mechanism 10 '. I'm supposed to grab it again.

Conventionally, when the work material processed by the turret punch press has a narrow width (which means a direction orthogonal to the length direction of the work material), the turret 2 is provided so that the clamper 5 can further advance. Turret 2 which limits the punching position by the punching die provided in the double row of
It is dealt with by taking measures such as partially removing the die arranged above.

[0005]

As described above, when processing a work material having a narrow width, the work material is received on the upper surfaces of many dies arranged on the lower turret. Since it is not possible to move the clamper in order to change the gripping position of the processed material while avoiding the arrangement, there is the following problem. a) Since the punching operation position of the turret is limited,
It takes time to select the punching position of the turret when the gripper changes the grip of the processed material. b) Due to the need to remove unused dies,
The work of removing the die increases the burden on the operator. c) Since the machine stops during the die mounting / demounting time, the actual operating time is reduced. d) Since the die is removed, the number of mounted dies is substantially reduced. e) Since the number of dies is small, the upper surface of the lower turret becomes uneven, and it becomes less smooth than in the case of a turret in which the work material is conveyed normally. Many problems arise.

According to the present invention, such a problem is solved, the work material is lifted while maintaining the predetermined state without touching the turret, and the clamper does not come into contact with the die and the gripping position is set in the optimum state. Another object of the present invention is to provide a work material re-gripping device in a turret punch press that can efficiently work even a narrow work material.

[0007]

In order to achieve such an object, the present invention provides a pair of work material holders provided at positions on both sides of the turret in a turret punch press which are not in contact with the turret on the punching press position side. Mechanism
It is characterized in that it is provided with a pad elevating means for lifting the work material to a height at which the clamper can be moved when the work material is re-gripped according to a command from the control unit.

[0008]

According to the present invention having such a structure, when the work material is clamped by the work material holding mechanism and the pad is raised by a command from the control unit when the work material is gripped and changed, the work material is fixed in a die state. Since it is lifted from the upper surface, the clamper can move in the space formed on the upper side of the die in a predetermined cycle, and the operation of re-grabbing the die without contacting the die can be easily performed. Then, if the clamping of the processing material holding mechanism is released and the pad is lowered, the processing material can be grasped and moved by the clamper without any trouble, so even if the processing material is narrow, it can be moved at a predetermined punching position. It can be punched and pressed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a work material re-gripping device in a turret punch press of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an essential part of a turret punch press equipped with a work material re-gripping device of the present invention, and FIG. 2 is a work material re-gripping device and turret of the turret punch press shown in FIG. FIG. 3 is a plan view mainly showing the relationship between FIG.
FIG. 4 is an enlarged side view of an essential part of the regrinding device for processed material according to the present invention, and FIG. 4 is an operation flowchart of the refilling device for processed material according to the present invention.

In these drawings, the apparatus for re-gripping a work material according to the present invention shows a punching press position a on the longitudinal center line of the main body frame 1 on the work material W supply side of the turret 2 in a turret punch press having a well-known structure. A pair of work material holding mechanisms 10 arranged at positions not contacting the turret 2 on both sides of the punching press position a on an axis line passing therethrough, and a control for electrically controlling the operation of the work material holding mechanism 10. And a unit 30 (incorporated in the operation control unit of the turret 2, see FIG. 4).

Since the pair of processed material holding mechanisms 10 have the same structure, only one of them will be described. This processed material holding mechanism
Reference numeral 10 denotes a pad 12 that is moved up and down by a required stroke by a fluid pressure operated pad operating cylinder 11 attached to the upper surface 1a of the main body frame 1 at a position where it does not come into contact with the rotary table 2'of the turret 2 and the main body frame. A pressing piece 17 which is attached to the side surface of the pad operating cylinder 1 and which is operated by a hydraulically operated pressing cylinder 16 which is vertically movable in conformity with the axis of the pad operating cylinder 11, and a fluid pressure supply mechanism 20 for operating these. It consists of

The pad operating cylinder 11 is a body frame 1
It is mounted in an upright state on the upper surface of the pad via a support base 13, and the pad 12 is detachably fixed to the tip end portion of the piston rod 11 'of the pad operating cylinder 11. In addition, a flat portion 12a is formed on one side surface of the pad 12, and a rotation stop block attached to the bracket 14 attached to the main body frame 1 is formed.
15 is abutted so that the pad 12 does not rotate. In addition, the upper surface of the pad 12 has a stepped portion 12 partly formed low so as not to come into contact when the clamper 5 is laterally moved.
equipped with b.

The presser cylinder 16 for operating the presser piece 17 is a bracket attached to the side surface of the body frame 1 as described above.
The pad operating cylinder 11 is provided to face the pad operating cylinder 11. The presser piece 17 is attached to the tip of the piston rod of the presser cylinder 16, and a notch 17a is provided at the end of the presser piece 17 at a position facing the pad 12 to move the clamper 5 when holding the workpiece W. A gap is formed that allows

For the pad operation cylinder 11, from the connection ports 21a and 21b of the electromagnetic switching valve 21 attached to the side surface of the main body frame 1 which is connected to the operation pressure fluid supply source (not shown) as the pressure fluid supply mechanism 20. , T-joints 22 on the way to the connection ports 11a and 11b of the pad operating cylinder 11 respectively.
Are connected via pipes 23 and 24, respectively. Then, the pipe on the operation side for raising the pad 12 of the pad operation cylinder 11
A regulator 25 and a pressure switch 26 are provided in 23 so that they will not operate due to overload. Further, although not shown in the drawing, the holding cylinder 16 is also piped from an electromagnetic switching valve.

The control unit 30 for electrically controlling the work material holding mechanism 10 having the above-described structure is the N / N of the turret punch press.
The pad operating cylinders 11 and the pressing cylinders 16 of the work material holding mechanism 10 are activated when a gripping change command of the work material W is called in by the procedure shown in FIG. 4 provided in association with the C control device. It is designed to let you.

The operation of the work material gripping and reassembling device of the present invention thus constructed will be described with reference to the operation flowchart of FIG. 4. N for controlling the operation of the turret punch press.
/ C controller gives each required machining command in step S1, the turret punch press operates and the workpiece W
Then, necessary processing such as drilling is performed. When the gripping of the workpiece W by the clamper 5 becomes necessary, the gripping position command of step S2 is given by the program of the N / C control device. Next, in step S3, when a gripping change command is given to the control unit 30 of the work material gripping change device, the electromagnetic switching valve 21 is turned on by the pad rising command in step S4, and the pad operating cylinder is connected from the connection port 21a through the pipe 23. Pressure fluid is sent to the piston side connection port 11a of 11 and the pad 12 is lifted from the fixed position through the respective piston rods 11 'of both pad operation cylinders 11 and 11 by the required strokes (indicated by symbol h in FIG. 3). Shown), processed material W
Are lifted above the pass line in the turret 2 part, and at the same time, they are held stationary by the thrust F1 of the pad operating cylinders 11.

Next, in step S5, a pressure fluid is sent to the piston side of each presser cylinder 16 by a presser piece lowering command, and the presser piece 17 descends together with each piston rod 16 'of both presser cylinders 16, The processed material W lifted by the pad 12 is pressed by the thrust F2 of the pressing cylinder 16 via the pressing piece 17, and the processed material W is clamped and held by the pressing piece 17 and the pad 12. In this state, the workpiece W is lifted above the pass line and held, so that a gap is formed between the upper surface of the die (not shown) and the lower surface of the workpiece W. Then, in step S6, a command for removing the workpiece holding force of the clamper 5 is given, the operating portion of the clamper 5 not shown operates, and the clamper 5 is opened to release the grasping of the workpiece W.

Therefore, this time, control is transferred to the N / C control unit side, and in step S7, a command to start the movement of the clamper 5 is given to a carrier (not shown) and both clampers 5 are moved.
Is moved by the required dimension in both X-axis and Y-axis directions. At this time, when the width of the processed material W is narrow and punching press processing is performed using the mold inside the turret 2, it is necessary to hold the processed material W without the clamper 5 coming into contact with the die of the turret 2. . Therefore, even if the gripping change position of the clamper 5 moves outward beyond the holding position of the work material holding mechanism 10, at the holding position of the pad 12 and the holding piece 17, the clamper 5 is attached to the pad 12 and the holding piece 17. Notch that allows movement (step 12b on the upper surface of the pad 12 and notch 17 of the pressing piece 17)
Since a) is provided, the clamper 5 can be moved laterally without any trouble. Further, the pushing position F1 of the pad 12 by the pad operating cylinder 11 and the pushing force F2 of the holding cylinder 16 are set such that F1> F2, so that the holding position of the workpiece W during gripping is not changed.

When the clamper 5 has finished moving to the required position, it is confirmed in step S8 that the clamper 5 has stopped moving, the control section 30 again moves to control, and in step S9 a command to close the clamper 5 is not shown. The clamper 5 is applied to the operation section 5 to close the clamper 5, and the gripping of the workpiece W is completed.
Therefore, in step S10, a command for lifting the presser piece is given to switch the electromagnetic switching valve (not shown) for operating the presser cylinder, and the supply of fluid pressure to the presser cylinder 16 is switched to the direction in which the piston rod is retracted and the presser piece 17 is moved.
Raise. Following this operation, in step S11, a pad lowering command is given to switch the supply of the fluid pressure to the pad operating cylinder 11 in the direction of retracting the piston rod 11 ', and the pad 12 descends to a fixed position to move to the next position. Prepared for action.

In this way, at the same time when the workpiece holding mechanism 10 returns to the original state, the machining commands for the turret 2 are given to the N / C control device in step S12, and the workpiece W is processed in a predetermined order. Is processed at the punching press position a. After that, when the required amount of processing is performed and the work material W needs to be gripped again, the work material holding mechanism 10 is operated again according to the above-described procedure, and the work material W is gripped again by the clamper 5.

[0021]

As described above, according to the present invention, since the punching operation position on the turret is not limited, re-gripping can be performed without moving the work material at the time of re-gripping. Also, in order to change the grip of the processed material, attach a die
This eliminates the need for removing work, reducing the labor of the operator and improving the actual operation of the machine. Furthermore, since there is no removal die, the number of dies to be attached increases, and die exchange for setup change becomes unnecessary. Furthermore, since all the dies can be mounted on the upper surface of the turret, the upper surface of the lower turret is close to a flat surface, which does not hinder the conveyance of the processed material. In particular, it has many advantages such that even a processed material having a narrow width can be processed without any trouble.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of a turret punch press provided with a work material gripping change device of the present invention.

FIG. 2 is a plan view showing the relationship between the work material re-grabbing device of the present invention and the turret in the turret punch press shown in FIG.

FIG. 3 is an enlarged side view of an essential part of the work material gripping change device of the present invention.

FIG. 4 is an operation flowchart of the work material re-gripping device of the present invention.

5A and 5B are schematic views showing a pressing mechanism of a work material in a conventional turret punch press, FIG. 5A is a plan view, and FIG. 5B is a longitudinal sectional view of a main part.

[Explanation of symbols]

 1 Body Frame 2 Turret 5 Clamper 10 Workpiece Holding Mechanism 11 Pad Operating Cylinder 12 Pad 16 Presser Cylinder 17 Presser Piece 20 Pressure Fluid Supply Mechanism 21 Electromagnetic Switching Valve 30 Control Section

Claims (1)

[Claims] 1. A pair of work material holding mechanisms provided at positions on both sides of the turret punching press position side of the turret punch press that do not contact the turret, and a clamper moves at the time of re-grabbing the work material according to a command from the control unit. A re-gripping device for a work material in a turret punch press, comprising a pad elevating means for lifting the work material to a possible height.