JP2002001464A - Punching press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punching press having simple structure without particular drilling-hole work for re-positioning operation. SOLUTION: The punching press is provided with a tool supporting body 3A of a turret or the like, a ram 16 making a punching tool punch, and a plate feeding mechanism 22 moving a plate W while holding the plate by a work holder 21. A plate pushing tool 4A for pushing the plate W is set up in a tool- supporting portion 33 as a part of the tool supporting body 3A instead of a tool. The plate pushing tool 4A is pushed down by the ram 16 to push the plate W. In this pushing state, change of a holding position by the work holder 21 on the plate W is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press capable of changing a holding position of a plate material by a work holder.

[0002]

2. Description of the Related Art Conventionally, in a turret punch press, a turret punch press provided with a work holder for gripping and moving a plate material is used as a plate material feed mechanism for feeding a plate material on a table to a ram position. ing. In this plate material feeding mechanism, it may be necessary to perform an operation of changing the holding position by the work holder by changing the plate material, that is, a so-called repositioning operation, depending on the size of the plate material, conditions of a punch portion on the plate material, and the like. In this plate material changing operation, simply releasing the grip by the work holder causes a positional shift of the plate material.Therefore, a pair of friction pads that can be moved up and down by the elevating cylinder is provided, and the plate material is pressed on the table by the friction pad. In some cases, displacement of the plate material is prevented.

[0003] However, in the case of fixing the plate material with such a friction pad, a lifting mechanism such as a cylinder for raising and lowering the friction pad is required as a dedicated mechanism for switching the plate material, which complicates the configuration. There is a problem.

[0004] In addition, there has also been proposed a method of performing a holding operation of a work holder in a state where a punch tool is stopped while a plate material is being penetrated in punching a plate material (Japanese Patent Application Laid-Open No. H10-156453). Gazette).

[0005] However, in the punch press having such a configuration, a punching process which is not related to the processing of the plate material is required for the switching operation of the plate material. Also, if the perforation is to be related to the processing of the plate material, the control of the plate material processing is limited, and the round hole is not suitable for positioning the plate material, so the processing becomes complicated. Become.

SUMMARY OF THE INVENTION An object of the present invention is to provide a punch press which solves such a problem and which can perform a repositioning operation with a simple structure without requiring special drilling.

[0007]

A punch press according to the present invention comprises: a tool support capable of supporting a plurality of tools; a ram for punching any of the plurality of tools; and a plate material held by a work holder. A plate material feed mechanism for moving the plate material, and a plate material presser for holding the plate material is supported on the tool support portion of the tool support, and the plate material is lowered by the ram to press the plate material. Thus, when the plate material is being held down by the plate material holding tool, the work material is used to change the plate material. According to this configuration, the plate holding tool for changing the plate by the work holder is supported by the tool supporting portion of the tool support, and is pressed down by the ram. Therefore, a special mechanism for raising and lowering the plate holding tool is not required, and the configuration is reduced. It's easy. Therefore, cost reduction can be realized. Also, a special drilling process for the plate material switching operation is not required.

In the present invention, the ram is moved up and down by a servomotor, and a presser control means for stopping the lowering operation of the ram when the load of the servomotor exceeds a predetermined value during the pressing operation of the plate material presser. May be provided. In the case of this configuration, the plate member can be pressed with a predetermined pressing force, and the plate member can be reliably pressed by the plate member holding member while the tool driving ram is also used for driving the plate member holding member.

Further, in the present invention, among the tool support portions of the tool support, the plate holding member may be supported by a tool support portion capable of supporting the largest tool. In the case of this configuration, even when the pressing force of the plate pressing member by the ram is relatively small, the plate can be pressed with a large frictional force.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a conceptual diagram of the punch press of this embodiment, and FIG. 2 is a perspective view of the punch press.
The punch press 1 is a turret type punch press, and a frame 2 has an upper frame portion 2A, a lower frame portion 2B, and a column portion 2C each having a box-shaped cross section, and a C-shaped side shape. Is formed. In the space between the upper and lower frame portions 2A and 2B of the frame 2, upper and lower tool supports 3A and 3B made of a turret are arranged, and are rotatably supported by the upper and lower frame portions 2A and 2B, respectively. A plurality of tool supports 33 are provided on the upper tool support 3 </ b> A, and the punch tool 4 is installed on each tool support 33. The tool support portions 33 are arranged along the circumferential direction on the outer peripheral portion of the upper tool support 3A made of a turret. Tool support 33
Is formed of a fitting hole into which the punch tool 4 is fitted so as to be able to move up and down, for example. The upper and lower tool supports 3A and 3B are indexed and rotated by a tool support driving device (not shown) installed on the frame 2.

A part of the tool support portion 3 of the upper tool support 3A
3, for example, a plate holding member 4A for holding the plate W instead of the punch tool 4 is provided at one tool support portion 33. A plurality of die tools 5 are provided on the lower tool support 3B on the circumference, and a plate material is provided instead of the die tool 5 on a tool support portion of the lower tool support 3B corresponding to the plate material presser 4A. A receiving tool 5A (FIG. 4) is provided. The tool support portion 33 of the upper tool support 3A is provided with a plurality of types having different sizes so that punch tools 4 of various sizes can be installed. The tool support portion 33 on which the plate holder 4A is installed is the largest tool support portion 33 among a plurality of types having different sizes.

The plate holder 4A is provided with a friction pad 4Ab constituting a plate holder surface below the holder main body 4Aa. The friction pad 4Ab is a member having a high coefficient of friction and is an elastic member, and is made of, for example, rubber such as urethane rubber. The friction pad 4Ab
Instead of using an elastic member, a spring member (not shown) may be provided to urge the friction pad 4Ab downward against the presser body 4Aa. The holding tool main body 4Aa includes the upper tool support 3A.
And a cylindrical member that fits into the tool support portion 33 having the fitting hole so as to be able to move up and down. At the upper end of the presser body 4Aa, there is provided a head 4Ac that is removably engaged with an engagement groove 16a at the lower end of the ram 16 so that the presser member 4A can be forcibly pulled up by the punch driving ram 16. ing. The head 4Ac is the same as the head provided on each punch tool 4. The side surface shape of the head 4Ac is, for example, T-shaped.

As shown in FIG. 3, a punch driving device 6 for driving the punch tool 4 for punching includes a servo motor 7 installed on the upper frame portion 2A, and converts the rotation of the servo motor 7 into a linear reciprocating motion in the vertical direction. And a conversion mechanism 8. The servo motor 7 has a built-in reduction gear 9 at the tip,
It is accommodated along the longitudinal direction Y of the upper frame portion 2A. The conversion mechanism 8 comprises a crank mechanism, and the crankshaft 10 is rotatably supported by a pair of bearings 11 and 12 at the tip of the upper frame 2A on the same rotation center O as the motor shaft 7a of the servomotor 7. Have been. The crankshaft 10 and the motor shaft 7a of the servomotor 7 are
Connected through. The eccentric shaft portion 10a of the crankshaft 10 is rotatably fitted to a hole at the upper end of the crank arm 14 via a bearing (not shown). A ram 16 is connected to the lower end of the crank arm 14 via a pin 15, and the ram 16 is supported by a ram guide 17 provided on the lower surface of the tip of the upper frame portion 2A so as to be able to move up and down. At the lower end of the ram 16, a head connecting portion formed of a T-shaped engaging groove or the like connected to the head of the punch tool 4 or the plate material presser 4A held by the upper tool support 3A as described above. Is provided.

As shown in FIGS. 1 and 2, a table device 18 is provided in front of the frame 2 following the frame 2. The table device 18 includes a work table 20 including a central fixed table 20a provided on a bed 19 and movable tables 20b on both sides thereof. The table device 18 is provided with a plate feeding mechanism 22 for holding and moving the plate W by the work holder 21. The movable table 20b is connected to the carriage 2 of the plate feeding mechanism 22.
Along with 3, along the rail 24 of the bed 19 back and forth (Y direction)
Is driven forward and backward. A cross slide 25 having a work holder 21 is provided on the carriage 23 in the left-right direction (X direction).
The plate material W, which is installed so as to be able to advance and retreat, is sent to the ram position P in the X and Y directions by the movement of the carriage 23 and the cross slide 25. The cross slide 25 is driven forward and backward in the left-right direction via a feed screw 27 and a ball nut 28 by driving a servo motor 26 provided on the carriage 23 (FIG. 2).

As shown in FIG. 4, the work holder 21
A movable upper jaw 30 is connected to a fixed lower jaw 29 such that the movable upper jaw 30 can be freely opened and closed about a support shaft 31.
30 between the tips. The movable upper jaw 30 is opened and closed by opening and closing drive means 32 such as an air cylinder mounted on the base end.

In FIG. 1, a control device 36 controls the entire operation of the punch press 1 and comprises a computer-based numerical control section and a programmable controller function section. The control device 36 also controls the operation of the work holder 21 holding the plate material W on the work table 20. The control device 36 has a presser control means 37. The presser control means 37 performs control to stop the lowering operation of the ram 16 when the load of the servomotor 7 exceeds a predetermined value when the press operation of the plate material presser 4A is performed by the ram 16 by driving the servomotor 7. . The control of the plate material changing operation by the control device 36 is performed as shown in the flowchart of FIG.

A description will be given of the operation of changing the plate material with the above-described configuration. At the time of the holding operation, prior to the operation, the plate presser 4A is indexed to the ram position instead of the punch tool 4 (step S1), and the punch driving device 6 is driven to move the plate presser 4A to the ram 16. Press down (S
2). If the load on the servomotor 7 exceeds a predetermined value during this pressing process, the presser control means 37 stops the lowering operation of the ram 16 (step S3). Thereby, the plate material W
Is pressed and fixed on the plate receiving member 5A by the plate pressing member 4A. In this case, since the driving source of the punch driving device 6 is composed of the servomotor 7, the plate material W is
Is stopped while the punch driving device 6 is pressed on the plate receiving member 5A. In this state, the grip of the work holder 21 is released (step S4). Even if the work holder 21 is released, since the plate material W is sandwiched between the plate material presser 4A and the plate material receiving member 5A, the original position of the plate material W is maintained without lateral displacement or rotational displacement. In this example, the largest punch tool 4 out of the support portions of the punch tool 4 and the die tool 5 of the upper tool support 3A and the lower tool support 3B.
Further, since the plate holding member 4A and the plate receiving member 5A are supported by the support portion 33 of the die tool 4, even if the pressing force of the plate holding member 4A by the ram 16 is relatively small, the plate member W is provided with a large frictional force. Can be held down. After the gripping of the work holder 21 is released in this manner, FIG.
(A), the cross slide 25 is moved right and left as indicated by a chain line (step S5).
To re-grip the plate material W (step S6). After that, the plate holder 4A is raised (Step S7).

As described above, according to the punch press 1, a special lifting mechanism is provided for driving the plate material presser 4A for pressing the plate material W onto the work table 20 in order to utilize a ram operation for punching. In addition, the plate holder W can be switched by the work holder 21 without any positional displacement of the plate member W without performing a special drilling process. Therefore, the configuration is simple, the number of parts is reduced, and the cost can be reduced.

[0019]

According to the punch press of the present invention, a tool support capable of supporting a plurality of tools, a ram for punching an arbitrary tool among the plurality of tools, and a plate material are gripped and moved by a work holder. A plate material feed mechanism, wherein a tool supporting portion of the tool support is supported by a plate material presser for pressing the plate material, and the plate material presser is lowered by the ram to press the plate material; When the plate material is held by the work holder, the work material is used to change the plate material.Therefore, a special mechanism for lifting and lowering the plate material holding tool is not required, the configuration is simplified, and a special drilling process for the holding operation is performed. Is also unnecessary. When the ram is moved up and down by a servo motor, and when a press operation of the plate presser is provided, a presser control means for stopping the lowering operation of the ram in a state where the load of the servo motor exceeds a predetermined value is provided. The plate material can be reliably held down by the plate material holder. When the plate holding member is supported by the tool supporting portion that can support the largest tool among the tool supporting portions of the tool support, even if the pressing force of the plate holding member by the ram is relatively small, the tool holding member is large. The plate can be held down by frictional force.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a punch press according to an embodiment of the present invention.

FIG. 2 is a perspective view of the punch press.

FIG. 3 is a longitudinal sectional view showing an installation portion of a punch driving device in the punch press.

FIG. 4A is a plan view showing a plate material changing operation of the punch press, and FIG. 4B is a longitudinal sectional view of the same.

FIG. 5 is a control flowchart of the same plate material changing operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Punch press 3A ... Upper tool support 4 ... Punch tool 4A ... Plate holder 21 ... Work holder 22 ... Plate feed mechanism 33 ... Tool support 37 ... Press control means W ... Plate

Claims (3)

[Claims] A tool support capable of supporting a plurality of tools;
In a punch press provided with a ram for punching an arbitrary tool from among the plurality of tools and a plate feed mechanism for holding and moving the plate by a work holder, the plate is pressed by a tool support portion of the tool support. Support the plate holder,
A punch press wherein the plate material is lowered by the ram so as to press the plate material, and when the plate material is pressed by the plate material holder, the work material is used to change the plate material. The ram is moved up and down by a servomotor, and a presser control means for stopping the lowering operation of the ram when the load of the servomotor exceeds a predetermined value during the pressing operation of the plate presser. The punch press according to claim 1 provided. 3. The punch press according to claim 1, wherein the plate holding member is supported by a tool supporting portion capable of supporting a largest tool among the tool supporting portions of the tool supporting member.