JP2002143947A - Punch press, and work machining method by the punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch press capable of preventing a work from being scratched or a forming part from being damaged during the movement or positioning, and a work machining method by the punch press. SOLUTION: When a punch supporting ram is retracted from the work W, a die supporting ram movement command signal output part outputs the command to a third actuator to retract the die supporting ram from the work W at a predetermined timing P1, etc., when a punch tip reaches a surface of the work W. In addition, when the die supporting ram is retracted from the work W, the work movement command signal output part outputs the command to a first actuator to move a work moving and positioning device in X and Y axis directions at a predetermined timing when the pulse distribution to the third actuator is completed (P5). When the movement of the work is completed, a first approaching movement signal output part outputs a first approaching movement signal to the third actuator to move the die supporting ram in the approaching direction to the work W (P7).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press for performing press working on a work in cooperation with a punch and a die, and a work processing method using the punch press.

[0002]

2. Description of the Related Art FIG. 16 shows a turret punch press 501 as a well-known punch press. In this turret punch press 501, a frame 503 having a gap portion G in the center is erected. The upper portion of the turret punch press 501 is supported rotatably by an upper frame 503U. 505U are provided. Also, a plurality of dies D (FIGS. 17 to 1) are opposed to the upper turret 505U.
9) is rotatably indexed to the lower frame 503L. The upper turret 505U and the lower turret 505L are synchronously rotated by a driving mechanism such as a belt 509 rotated by a motor 507.

The gap G is provided with a processing table 511 for movably supporting the work W.
On the processing table 511, a carriage base 519 is provided, which is movable and positionable in the Y-axis direction via a Y-axis ball nut 517 when the Y-axis motor 513 rotates the Y-axis ball screw 515. The carriage base 519 is provided with an X carriage 521 that can be moved and positioned in the X-axis direction. The X carriage 521 has a work clamper 523 that holds the work W.
Are provided so that the interval can be adjusted.

A hydraulic unit 525 for driving a driving device is provided near the turret punch press 501.
And an NC console 5 for controlling the positioning of the work W, the rotation indexing of the upper turret 505U and the lower turret 505L, or controlling the hydraulic unit 525.
27 etc. are provided.

With the above structure, the punch P used by rotating the upper turret 505U and the lower turret 505L is used.
And the die D are indexed to the processing position K, the carriage base 519 is moved in the Y-axis direction, and the X carriage 5 is moved.
21 is moved in the X-axis direction, and the processing point of the work W gripped by the work clamper 523 is determined to the processing position K. Then, the punch P is pressed by a driving device (not shown), and punching is performed in cooperation with the punch P and the die D.

[0006]

However, in the turret punch press 501 described above, the feed clear d between the upper turret 505U and the lower turret 505L is small as shown in FIG.
(0 mm), there is a possibility that the workpiece W may be crushed by being caught by the dies mounted on the upper and lower turrets 505U and 505L in the processing in which the workpiece W is warped.

Further, as shown in FIG. 18, it is difficult to synchronously move all the dies D mounted on the lower turret 505L up and down when the work W is moved. There is a problem that the back surface of the work W is damaged by the die D mounted on the work D.

Further, as shown in FIG. 19, when turrets 505U and 505L are used, a plurality of dies are arranged on a pass line. In the case of performing the processing, the molding part 529 interferes with an adjacent die and is crushed or damaged. For this reason, there is a problem that a skilled operation occurs and the work efficiency is reduced, in particular, because downward molding is performed in a separate step or a movement or a processing order that avoids interference is manually edited by devising a program.

That is, in an automatic programming device,
The movement trajectory is determined so that the processing time, that is, the material movement distance to the next processing coordinate is the shortest, but since the movement trajectory that avoids problems such as catching cannot be considered, the program must be automated. Can not be done.

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above-mentioned problems of the prior art, and does not scratch the work or damage the molded portion when the work is moved and positioned. An object of the present invention is to provide a punch press and a work processing method using the punch press.

[0011]

According to a first aspect of the present invention, there is provided a punch press for moving and positioning a plate-shaped work to be pressed in the X and Y-axis directions on a work pass line. A movable work positioning device, a first actuator for moving the work movable positioning device in the X and Y directions, and a punch for processing the work; A punch support ram reciprocally movable in the Z-axis direction, a second actuator for reciprocating the punch support ram, and a die supporting the die cooperating with the punch and reciprocally movable in the Z-axis direction. In a punch press comprising a ram and a third actuator for reciprocating the die supporting ram, the punch supporting ram separates from the workpiece. During the movement in the direction, when the tip of the punch reaches the surface of the work, when the punch completion quick release timer set by the parameter times out, or when the punch completion ram set by the parameter, the punch support ram is A die support ram movement command signal output unit for outputting a movement command signal to the third actuator to move the die support ram away from the work when the die support ram is reached, and when the die support ram moves in a direction away from the work. A work movement command signal output unit that outputs a movement command to the first actuator when a predetermined time set in advance from the end of the pulse distribution to the third actuator or the start of the movement of the die support ram,
A first approach movement signal output unit that outputs a first approach movement signal to the third actuator to move the die support ram in a direction approaching the work before or at the end of the movement of the work movement positioning device; A second approach movement signal output unit that outputs a second approach movement command to approach the punch support ram to the work immediately before or at the end of the approach movement of the die to the work. Is what you do.

Accordingly, the first actuator moves the work movement positioning device in the X and Y axes to position the work, and the second actuator moves the punch support ram in the Z axis to approach the pass line. At the same time, the third actuator moves the die supporting ram in the Z-axis direction, and performs processing by cooperation between the punch and the die.
At this time, when the punch support ram moves in the direction away from the workpiece after processing, when it is detected that the tip of the punch has reached the surface of the workpiece, or when the punch completion quick-start timer set by the parameter times out, or When the punch support ram reaches the punch completion position set by the parameter, the die support ram movement command signal output unit outputs a movement command signal to the third actuator to lower the die support ram and separate it from the workpiece. . Also, when the die support ram moves in the direction away from the work, when the pulse distribution to the third actuator ends, or when a predetermined time set in advance from the start of the movement of the die support ram, a work movement command is issued. The signal output unit outputs a movement command to the first actuator to move the work movement positioning device in the X and Y axis directions to position the work movement positioning device at the next processing position. Immediately before or at the end of the movement of the work movement positioning device, the first approach movement signal output unit outputs a first approach movement signal to the third actuator to raise the die support ram to approach the work. In the direction you want. Further, immediately before or at the end of the approach movement of the die to the work, the second approach movement signal output unit outputs a second approach movement command to the second actuator to process the punch support ram to approach the work. Let it.

According to a second aspect of the present invention, there is provided a work processing method using a punch press for moving a plate-shaped work to be pressed in the X and Y-axis directions on a work pass line, and for performing the press work on the work. In a work method by a punch press in which a punch and a die are moved toward and away from the work to press the work, the punch and the die are brought into contact with the work when the work is pressed, and When performing the movement, the punch and the die are both separated from the work, and the work is pressed.

Therefore, when the plate-shaped work to be pressed is moved and positioned in the X and Y-axis directions on the pass line, the punch and the die are separated from the work, and the punch and the die are brought close to each other. When performing the press working in cooperation, the punch and the die are carried out after contacting the work. This is repeated to perform work positioning and press working.

According to a third aspect of the present invention, in the method for processing a workpiece by the punch press according to the second aspect, the movement of the die in a direction away from the workpiece is started in a direction away from the workpiece. At the same time as the movement of the punch or when a predetermined time has elapsed after the start of the punch movement, when the tip of the punch reaches the surface of the work, or when the punch separates from the surface, the movement of the work is started in the direction in which the die separates from the work. The movement of the die to the work is started immediately before or after the end of the positioning of the work, and the start of the approach movement of the die to the work is performed immediately after the elapse of a predetermined time from the start of the movement or after the movement of the die is stopped. The approaching movement of the die starts immediately before or at the time when the approaching movement of the die stops. Rukoto, and it is characterized in.

Therefore, after machining, simultaneously with the movement of the punch in the direction away from the work, when a predetermined time has elapsed after the start of the movement of the punch, when the tip of the punch reaches the work surface, or when the punch separates from the work surface. The die moves upward and starts moving in the direction away from the work, and when the die starts moving in the direction away from the work, or after a predetermined time has elapsed since the start of the movement, or after the die has stopped moving, positioning of the work is determined. Start. Also,
At the time of press working, immediately before or immediately after the end of positioning of the work, the die rises to the work and starts approaching movement, and immediately before or immediately after stopping the approaching movement of the die, the punch moves down. Then, press work is started after approaching the work.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 show a punch press 1 according to the present invention. In this punch press 1,
A gap G is provided between the upper frame 5 and the lower frame 7 at the center of the gate-shaped frame 3.
At a processing position K in the gap G, a punch P is supported by the upper frame 5 so as to be vertically movable, and a die D
Are supported by the lower frame 7 so as to be vertically movable.

On the other hand, the gap G is provided with a work movement positioning device 9 for supporting and positioning the work W to be machined. In this work movement positioning device 9,
A carriage base 15 is provided at the right end in FIG. 1 of the processing table 11 so that the processing table 11 moves along a pair of guide rails 13 provided in the Y-axis direction (left-right direction in FIG. 1). The carriage base 15 can be moved and positioned in the Y-axis direction by a Y-axis motor (see FIG. 10). The carriage base 15 is provided with a plurality of work clampers 17 for gripping the work W, and can be moved and positioned in the X-axis direction (vertical direction in FIG. 2) by an X-axis motor (see FIG. 10). 19.

With the above structure, the work W is gripped by the work clamper 17, the X carriage 19 is moved in the X-axis direction, and the carriage base 15 is moved in the Y-axis direction to position the work W at the processing position K. . Then, the punch P is pressed by the driving device, and the work W is punched by the cooperation of the punch P and the die D.

On the other hand, on the left side of the punch press 1 in FIG. 1, a mold storage device 21 for storing a large number of punches P and dies D is provided. Between the mold storage device 21 and the punch press 1, a used mold is unloaded from the punch press 1 and stored in the mold storage device 21, or a new mold to be used next is transferred to the punch press 1. It has a mold changing device 23 for carrying in. On the right side of the punch press 1, a control device 25 such as an NC device for controlling the punch press 1 is provided.

FIGS. 3 to 5 show a punch support 27 for supporting the punch P and a die support 29 for supporting the die D.
It is shown.

Referring to FIG. 3, the cylindrical support body 31 having the step of the punch support portion 27 is attached to the upper frame 5.
A ram cylinder 33 as a second actuator is provided in a central space of the support body 31, and an index gear 37 is mounted on an upper end of an upper piston rod 35U extending upward. Is provided.

The index gear 37 is connected to the upper piston rod 35U by a spline portion 39 so as to rotate integrally with the upper piston rod 35U and to be relatively movable up and down. The gear 37 (not shown) is driven by an index motor (not shown). ) To rotate the punch P.

4 and 5, a lower piston rod 35L extending downward from the ram cylinder 33 is provided.
Press ram 41 as a punch support ram at the lower end of
Are provided, and can be positioned at the processing height position and the mold replacement height position by the action of the ram cylinder 33. A lock mechanism 4 as a punch clamper for gripping and locking the punch P is provided inside the press ram portion 41.
3 are provided.

The lock mechanism 43 has a lock outer cylinder 45,
The lock outer cylinder 45 is provided inside the press ram portion 41, and a space inside the lock outer cylinder 45 is provided with a partition 49 having a seal 47, and is divided into an upper space 51 and a lower space 53. A lock cylinder 55 is provided in the upper space 51, and a piston rod 57 of the lock cylinder 55 passes through the partition 49 and
3, a plate 59 and a plurality of lock claws 6 are provided at the lower end of the piston rod 57 in the lower space 53.
1 (collet chuck) is provided so as to be freely opened and closed.

A spherical portion 6 is provided at the tip of the lock claw 61.
The lower space 53 in which the lock claw 61 moves up and down is provided with a lock outer cylinder 45 so that the lower end is widened.
A step 65 is provided inside the lower part of the. The lower end of the inner surface of the lock outer cylinder 45 has a tapered hole 67 extending downward.
Is provided.

Therefore, the upper chamber 55 of the locking cylinder 55
When the pressure oil is supplied to U and lowered, the spherical portion 63 of the lock claw 61 moves to the lower side of the step 65, so that the lock claw 61 is opened and unlocked (the state shown in FIG. 5). On the other hand, when pressurized oil is supplied to the lower chamber 55L of the locking cylinder 55 and raised, the spherical portion 63 of the locking claw 61 is raised and moved inward by the step 65, so that the locking claw 61 is closed and locked. (The state shown in FIG. 4).

Referring to FIG. 6, the lower end of the support body 31 is provided with a plate press up / down cylinder 6 as a fluid pressure cylinder.
9 are provided at four positions. The piston 71 of the plate press up / down cylinder 69 is urged upward by a spring 73, and the pressing force is adjusted by the plate press up / down cylinder 69 according to the thickness of the work W. You can do it.

An upper plate holding support block 77U of the plate holding member is vertically movably attached to the lower end of the piston rod 75, and a lower plate is provided below the upper plate holding support block 77U. Presser support block 77
L is attached so as to be vertically movable and rotatable.
Is provided. The stop member 79 is configured to come into contact with a stopper 81 provided at the lower end of the upper plate pressing support block 77U.

An air cylinder 83 is attached to the lower plate holding support block 77L inward, and the tip of the piston rod 85 is attached to the lower plate holding support block 77L.
The rotation of the lower plate pressing support block 77L is stopped at a predetermined position by being fitted into the concave portion 87.

Left and right (left and right in FIGS. 4 and 5) locking portions are provided on the lower plate pressing support block 77L for holding a plate pressing 89 as a die mounting portion of the punch P via the stopper member 79. And a pair of punch holding claws 91 are provided. The lower plate holding support block 77L includes:
An oil passage 93 for supplying lubricating oil is provided. A bolt BT is provided inside the stopper member 79, and the urging force of a spring 94 provided on the bolt BT causes
The stop member 79 is constantly urged upward.

Therefore, in order to slightly leave a gap between the upper surface of the plate retainer 89 and the lower surface of the lower plate retainer support block 77L,
The height is adjusted by adjusting the height of the stopper 81. 6, a notch C for preventing the punch P from interfering with a pull stud 141 which will be described later when the punch P is replaced is provided as shown by a two-dot chain line in FIG.

On the other hand, referring to FIG.
Here, the cylindrical upper and lower support bodies 95U and 95L are integrally connected by bolts 97 and fixed to the lower frame 7.

A screw portion 9 is provided on the inner peripheral surface of the lower support body 95L.
9 is formed, and the lifting member 1 is screwed into the screw portion 99 and is movable up and down relatively with respect to the lower support body 95L.
01 is provided. An elevating gear 105 is provided at the lower end of the elevating member 101 via a spline portion 103 so as to be vertically movable relative to the elevating member 101 and to rotate integrally therewith. Rotates in a fixed position. The lifting gear 105 is rotated by a lifting motor 109 as a third actuator via a gear 107 and the like.

Accordingly, the elevating motor 109 is connected to the gear 107
When the elevating gear 105 is rotated via the like, the elevating member 1
Numeral 01 moves up and down along the lower support body 95L by the action of the screw portion 99, and the processing height position (the state shown in FIG. 4) where the upper surface of the die D is positioned on the pass line during processing, or It is positioned at the exchange height position (the state shown in FIG. 5) for exchanging D.

4 and 5, on the upper side of the elevating member 101, a support base 111 as a die support ram that can move up and down along the inner peripheral surface of the upper support body 95U.
Are provided, so that the processing height position and the mold replacement height position can be selectively positioned. This support 111
Forming cylinder 11 as a fluid pressure cylinder
3 are provided. The center of the piston rod member 115 of the molding cylinder 113 is a hollow space 11.
Numerals 7 are provided on the upper and lower sides so that a scrap generated at the time of punching can be dropped and discharged.

An index gear 121 is provided on the upper outer peripheral surface of the piston rod member 115 via a spline portion 119 so as to be vertically movable relative to the piston rod member 115 and to rotate integrally therewith. ,
It is rotated at a fixed position by the index motor 123.

A die support block 125 as a mold mounting portion is provided above the index gear 121. The die support block 125 penetrates the index gear 121 and is always attached downward by a spring 127. Threaded part 129 at the upper end of pin 129
The U is screwed and rotates integrally with the index gear 121 (see FIG. 4).

As shown in FIG. 5, when the support table 111 is lowered, the index gear 121 is also lowered integrally, so that the pin 129 is also lowered.
Is in contact with the upper end of the upper support body 95U and cannot be further lowered, so that it is relatively pushed up. Since the die 129 is relatively pushed up by the pins 129, the lower surface of the die D is separated from the upper end surface of the piston rod member 115 to be in an unlocked state. The die support block 125 is provided with a pair of die holding claws 131 as left and right (left and right in FIGS. 4 and 5) locking members for holding the die D.

Accordingly, when the index gear 121 is rotated by the index motor 123 in the unlocked state in which the support table 111 is lowered, the die holding claws 131 are also integrally rotated. The rotational index of the die D can be performed. Then, the support stand 111 is raised, and the upper surface of the piston rod member 115 is pressed against the lower surface of the die D by the urging force of the spring 127 to lock the die D (see FIG. 4).

Next, the punch P and the die D constituting the punch press die apparatus will be described.

Referring to FIGS. 7A and 7B together,
In the punch P, a plate presser 89 is provided around the punch blade 133 so as to be movable up and down relatively.
Above 3 is an upper punch 135 as a base plate.
Is attached. The punch upper portion 135 is a common component that can be used for various punches P, and the punch blade portion 133 can be freely lowered until the punch upper portion 135 is caught by the concave portion of the plate holder 89.

In the center of the upper surface of the upper portion 135 of the punch, a protruding engagement portion 137 protruding upward is provided, and a tapered portion 139 (for example, about 2 degrees) is provided so that the upper portion becomes narrower. . The tapered portion 139 is adapted to fit into the tapered hole 67 provided at the lower end of the inner surface of the lock outer cylinder 45 described above (see FIGS. 4 and 5).

Accordingly, the tapered portion 139 of the punch P fits into the tapered hole 67 of the lock outer cylinder 45, and the bottom surface of the lock outer cylinder 45 contacts the upper surface of the punch upper part 135 so that the two surfaces are positioned and restrained. Therefore, the position and the height of the punch P can be easily and reliably determined.

A pull stud 141, which is locked by the above-described lock mechanism 43, is mounted on the upper surface of the punch blade 133 by a bolt 143. The upper punch 135 is connected to the punch blade 133 via the pull stud 141. It is integrally attached to.

On the outer peripheral surface of the plate retainer 89, the lower plate retainer support block 77D is positioned upward (upward in FIG. 7B).
A pair of parallel punch mounting grooves 145 are provided as a first locked portion to be held by the work supporting claw 91 of FIG.
5 (here, a direction orthogonal to FIG. 7A)
A pair of parallel punch replacement grooves 1 as a second locked portion to be held at the time of punch replacement in the vertical direction.
47 are provided.

For this reason, by moving the punch P along the punch mounting groove 145, the punch P can be easily removed and easily mounted, so that the punch replacement time can be greatly reduced. . In addition, plate holder 8
Inside 9, four lubricating oil supply paths 151 for supplying lubricating oil to the sliding surface between the plate holder 89 and the punch blade 133 are provided.

In FIGS. 7A and 7B, the aforementioned punch mounting groove 145 and punch replacement groove 147 are described.
Indicates a concave groove, but may be a projecting ridge instead of a groove.

At the center of the lower surface 89L of the plate holder 89, a guide portion 149 (see FIGS. 8A to 8C) for guiding the vertical movement of the punch blade portion 133 is provided. In order to reduce the frictional force between the blade portion 133 and the inner surface of the plate presser 89, a lubricating oil supply for supplying lubricating oil to the sliding surface between the plate presser 89 and the punch blade portion 133 inside the plate presser 89. A road 151 is provided. The lubricating oil supply path 151 is connected to an oil path 93 provided in the above-described plate holding support block 77.

FIGS. 8A to 8C show examples in which the size B of the punch blade 133 is different. here,
Since the configuration of the punch P is common, the same parts are given the same reference numerals, and the duplicate description is omitted.
9 are provided.

Referring to FIGS. 9A and 9B together,
In the die D, the die blade 153 is supported by the die holder 155. On the outer peripheral surface of the die holder 155, a pair of parallel dies as a first locked portion to be held on the lower side (the lower side in FIG. 9B) by the die holding claws 131 of the die support block 125. A mounting groove 157 is provided, and a die mounting groove 157 is provided at a stepped position above the mounting groove 157.
(In this case, the direction orthogonal to the vertical direction in FIG. 9A).
Is provided with a pair of parallel die exchange grooves 159 as locked portions.

For this reason, by moving the die D along the die mounting groove 157, the die D can be easily removed and easily mounted, so that the die replacement time can be greatly reduced. .

9 (A) and 9 (B), the die mounting groove 157 and the die replacement groove 159 are
Although the case where the groove is concave is shown, a projecting ridge may be used instead of the groove.

FIG. 10 shows the configuration of the control device 25. In the control device 25, the central processing unit C
An input unit 163 such as a keyboard for inputting various data and an output unit 165 such as a CRT for displaying various data are connected to the PU 161.

The work W is stored in the CPU 161 in the X direction.
As a first actuator, the X-axis motor 167 for moving and positioning the X carriage in the X-axis direction and the carriage base 15 are moved in the Y-axis direction to move the workpiece movement positioning device 9 for moving and positioning in the Y-axis direction. A work movement command signal output unit 171 that outputs a movement signal is connected to a Y-axis motor 169 that moves and positions in the direction.

Similarly, the CPU 161 is provided with a second approach movement signal output unit 173 that outputs a command to the ram cylinder 33 that moves the press ram unit 41 that moves up and down while supporting the punch P in the Z-axis direction. It is connected.

Further, a die support ram movement command for outputting a movement command signal to a lifting / lowering motor 109 as a third actuator for vertically moving a support base 111 as a die support ram supporting the die D in the Z-axis direction. Signal output unit 1
75, a first approach movement signal output unit 177, and a pulse distributor 179 are connected to the CPU 161.

On the other hand, the controller 25 includes a punch position detecting means 181 such as a linear scale for detecting the height position of the punch P, and a motor for elevating and lowering for detecting the height position of the die D. Die position detecting means 1 such as a rotary encoder or a linear scale attached to the 109
83 is connected and sends information on the height of the punch P and the height of the die D. The CPU 161 is connected to a timer 185 serving as a punch completion quick delivery timer, and sends a signal indicating that a predetermined time has elapsed.

Next, referring to FIG.
Will be described.

In FIG. 11, the upper part shows the vertical position of the punch P indicating the pressing operation, and the middle part shows the Du axis, that is, the vertical position of the die D. The lower part shows the movement state of the work W in the X-axis and Y-axis directions.

When the pressing operation is started, the punch P descends at a predetermined speed, and the tip comes into contact with the upper surface of the work W (FIG. 1).
At 1 (middle point P1), the descending speed of the punch P is reduced and reaches the descending end (middle point P2 in FIG. 11).

Then, the punch P starts rising from the lower end, and when one of the following conditions (1) to (4) is satisfied, the lowering of the die D is started by the Du axis (point P3 in FIG. 11), and the die D Is separated from the work W. That is, when the punch P starts to separate from the work W (FIG. 11)
Middle point P4), that is, when the punch P reaches the upper surface position of the work W or separates.

After the timer 185 has passed a predetermined time T1 set by a parameter from the issuance of the ram ascending command (including simultaneous with the issuance of the ram ascending command).

When the punch position detecting means 181 detects that the punch P has reached the punch completion position set by the parameter.

Next, as described above, the Du axis starts to move (point P3 in FIG. 11), and when one of the following conditions is satisfied, the work W moves in the X-axis and Y-axis directions. (Point P5 in FIG. 11). That is, when the die D starts moving in the direction away from the workpiece W by descending, that is, when the distribution of the Du axis movement command set by the die condition or the like by the pulse distributor 179 is completed (see FIG. 11). Point P6).

After a lapse of a predetermined time T2 from the start of the movement (including after the movement of the die D is stopped). For this reason,
Prepare the axis movement quick start parameter, and set the X axis and Y
Enable to set advance or delay of axis start condition. The parameters to be set are set in machine parameters or mold information, and conditions of a special mold such as a molding mold are considered.

Next, when one of the following conditions is satisfied with respect to the X-axis and Y-axis movements of the work W, the Du-axis operation is started to raise the die D to move the work W
(Point P7 in FIG. 11). That is, at the end of the positioning of the work W (point P8 in FIG. 11) or immediately before or immediately after the end, that is, immediately before, at the completion of, or after the completion of the distribution to the movement command of the X axis and the Y axis.

A timer 185, which is a Du axis movement start-up quick start timer set by a parameter, is set to a predetermined time T3.
When timed out. The set value of the timer 185 is a ± value (no directionality).

Further, when one of the following conditions is satisfied with respect to the Du axis, the punch P is raised to approach the work W to start the press operation (point P9 in FIG. 11). In other words, when the approach movement of the die D to the work W is stopped (point P10 in FIG. 11) or immediately before or immediately after the stop, that is, immediately before or after the distribution of the Du axis movement command set by the mold condition or the like is completed. At or immediately after completion.

A timer 185, which is a timer for early and late pressing, is set in the state of the Du axis, and a predetermined time T4
Has passed. The parameters are set in machine parameters or mold information. At this time, conditions of a special mold such as a molding mold are considered.

Thereafter, press working is performed by repeating the above-described steps.

FIG. 12 (A) shows the die D in a lowered state, and FIG. 12 (B) shows the die D in a state ascended to the pass line PL. The difference between the height of the lowered state and the height of the raised state is defined as H1. The mechanical end when the upward molding die is mounted is located at a position a predetermined distance h (for example, 5 mm) above the pass line PL.

FIG. 13 shows Du during the home return operation.
The movement pattern of the axis is shown. The origin position is located at a position H2 below the mechanical top dead center, and the idle position, which is the mold changing position, is located at a position H3 above the mechanical bottom dead center, which is the mechanical origin.

In the home return operation, the die D starts to descend from the home position, as shown by the solid line in FIG. The change in torque at this time is shown by a broken line in FIG. That is, the torque first increases and then becomes a constant value. When the die D reaches the mechanical bottom dead center, the lowering of the die D is forcibly stopped, so that the torque rapidly increases. The torque at this time is detected.

Thereafter, when the torque is reduced, the die D starts to rise, and when it reaches a predetermined height, the torque is increased again to lower the die D, and the die D reaches the mechanical bottom dead center again and the torque rapidly increases. And establish the origin. And
The die D is raised, moved to an idle position, which is a die changing position, and stopped. As described above, by performing the torque detection twice, it is confirmed that the origin of the Du axis is at a predetermined position.

FIG. 14 shows Du during the mold changing operation.
The movement pattern of the axis is shown. That is, when the mold exchanging operation is started, the die D is lowered from the pass line PL by the release stroke H4 and positioned at the mold exchanging position. Here, H4 is given by H1-H3.

Then, when the die D reaches the mold exchanging position, the mold exchanging device 23 is notified of the mold transfer permission and the mold exchanging is performed. start. When the die D reaches the pass line PL, a press start is notified and the die D is stopped at the pass line PL to complete the die changing operation.

FIG. 15 shows a movement pattern of the Du axis during the punching operation. This movement pattern
The movement pattern of the D-axis is the same as the movement pattern of the Du axis described earlier with reference to FIG. 11. I do. When the press working is completed, the work W is moved down, the work W is moved up, and the press working is performed. This is repeated to press the work W.

Note that the die up / down instruction and cancellation of the punching die are specified by the M code, and the escape amount n depends on the value registered in the NC machine parameter. Also, the die escape amount of the downward molding die is added to the molding M code, and a single M
No code is used.

It is assumed that the rising position of the Du axis is automatically calculated from the die height information stored in the die information of the die.

This function makes it possible to always work at the optimum position of the die even if the die is polished and the dimensions are changed.

From the above results, in this punch press 1, the press ram portion 41 as the punch support ram is moved in the direction away from the work W, and
After moving 11 in the direction to separate from the workpiece W,
Since the work movement positioning device 9 is moved in the X and Y axis directions, it is possible to prevent the back surface of the work W from being scratched, and to prevent the work W from interfering with the punch P or the die D. it can.

Further, at the time of press working, immediately before the end of the movement of the work W or at the end of the movement, the support table 111 is
And the press ram portion 41 as a punch support ram approaches the work W immediately before or at the end of the approach movement of the die D to the work W, so that the work W has a forming portion. Also punch P and die D
Can be prevented.

[0085]

As described above, in the punch press according to the first aspect of the present invention, the first actuator moves the work movement positioning device in the X and Y axes to position the work, and the second actuator Moves the punch support ram in the Z-axis direction to approach the pass line, and the third actuator moves the die support ram in the Z-axis direction to perform processing by cooperation between the punch and the die.
At this time, after the press working, the punch support ram is moved in the direction away from the work, and the die support ram is moved down in the direction in which the work is released from the work. By outputting the movement command and moving the work movement positioning device in the X and Y axis directions to position the next work position, etc., it is possible to prevent scratches on the back surface of the work and to prevent the work and the punch or Die interference can be prevented. Also, at the time of press working, immediately before or at the end of the movement of the work, the die support ram is raised to move in a direction approaching the work, and the punch support ram is lowered immediately before or at the end of the approach movement of the die to the work. Since the work is performed close to the work, the work can be prevented from interfering with the punch and the die even if the work has a formed part.

In the work processing method using a punch press according to the second aspect of the present invention, when a plate-shaped work to be pressed is moved and positioned in the X and Y axis directions on a pass line,
When the punch and the die are separated from the work, and when the punch and the die are brought close to each other to perform the press working in cooperation with each other, the punch and the die are brought into contact with the work.
Since the work is positioned and pressed by repeating this, it is possible to prevent the back surface of the work from being scratched by the die.

According to a third aspect of the present invention, there is provided a method of processing a work by a punch press, the same as the movement of the punch in a direction away from the work, after a lapse of a predetermined time after the start of the punch movement, or when the tip of the punch reaches the work surface. When the punch is released from the work surface
Die rises and starts moving in the direction away from the work, and starts moving and positioning the work when moving the die in the direction away from the work, after a lapse of a predetermined time from the start of this movement, or after stopping the movement of the die Therefore, it is possible to prevent the back surface of the work from being scratched by the die. At the time of press working, immediately before or immediately after the end of the positioning of the work, the die rises with respect to the work and starts approaching movement. Is pressed down and starts to approach the work, so that press work is performed. Therefore, even if the work has a formed portion, it is possible to prevent interference with a punch or a die.

[Brief description of the drawings]

FIG. 1 is a front view showing an entire punch press according to the present invention.

FIG. 2 is a plan view seen from a direction II in FIG.

FIG. 3 is a cross-sectional view showing a punch support and a die support.

FIG. 4 is a cross-sectional view showing a punch support and a die support during processing.

FIG. 5 is a cross-sectional view showing a punch support and a die support at the time of mold replacement.

FIG. 6 is a cross-sectional view showing a punch support portion and a plate retainer.

FIGS. 7A and 7B are a plan view and a sectional view of a punch.

FIGS. 8A to 8C are cross-sectional views showing punches of various sizes.

FIGS. 9A and 9B are a plan view and a cross-sectional view of a die.

FIG. 10 is a block diagram showing a configuration of a control device for a punch press according to the present invention.

FIG. 11 is a time chart showing a temporal relationship between a press operation, a die movement, and a work movement.

FIG. 12A is a front view showing the die in a lowered state,
(B) is a front view showing the die in a raised state.

FIG. 13 is a time chart showing a die movement pattern during a home position return operation.

FIG. 14 is a time chart showing a die movement pattern during a mold changing operation.

FIG. 15 is a time chart showing a die movement pattern during a punching operation.

FIG. 16 is a perspective view showing a turret punch press generally used in the related art.

FIG. 17 is an explanatory diagram showing a conventional problem.

FIG. 18 is an explanatory diagram showing a conventional problem.

FIG. 19 is an explanatory diagram showing a conventional problem.

[Explanation of symbols]

 Reference Signs List 1 punch press 9 work movement positioning device 33 ram cylinder (second actuator) 41 press ram unit (punch support ram) 109 elevating motor (third actuator) 111 support base (die support ram) 167 X-axis motor (first 169 Y-axis motor (first actuator) 171 Work movement command signal output unit 173 Second approach movement signal output unit 175 Die support ram movement command signal output unit 177 First approach movement signal output unit 185 Timer ( Punch completion quick release timer) P punch D die

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B30B 15/00 B30B 15/00 BF Term (Reference) 4E048 CA02 CA05 CA07 CA11 MA08 MA09 4E088 JJ02 4E090 AA01 AB01 CA03 HA04

Claims (3)

[Claims] 1. A work movement positioning device capable of moving and positioning a plate-shaped work to be pressed in X and Y directions along a work path line, and a method for moving the work movement positioning device in the X and Y directions. A first actuator, a punch support ram having a punch for processing the work, and capable of reciprocating in the Z-axis direction which approaches and separates from the pass line, and for reciprocating the punch support ram. A second actuator, a die supporting ram provided with a die cooperating with the punch and capable of reciprocating in the Z-axis direction, and a third actuator for reciprocating the die supporting ram. In the press press, when the punch support ram moves in the direction away from the work, when it is detected that the tip of the punch has reached the surface of the work, When the punch completion quick-start timer set by the meter times out or when the punch support ram reaches the punch completion position set by the parameter, a movement command to the third actuator to move the die support ram away from the work. A die support ram movement command signal output unit for outputting a signal, and when the die support ram moves in a direction away from the work, at the end of pulse distribution to the third actuator or at the start of the movement of the die support ram. A work movement command signal output unit for outputting a movement command to the first actuator when a predetermined time elapses from a predetermined time, and a die support ram to the third actuator immediately before or at the end of movement of the work movement positioning device. To output a first approach movement signal to move the first approach direction to approach the workpiece. A near-movement signal output unit; and a second approach-movement signal output unit that outputs a second approach-movement command to approach the punch support ram to the work immediately before or at the end of the approach movement of the die to the work. A punch press. 2. A plate-like work to be pressed is moved in the X and Y-axis directions on a work pass line, and a punch and a die for performing the press working of the work are moved toward and away from the work. In the work method by a punch press, which moves in the direction to press the work, the punch and the die are brought into contact with the work when the work is pressed, and the punch and the die are moved together from the work when the work is moved. A work processing method using a punch press, wherein the work is pressed by repeatedly separating the work. 3. The movement of the die in the direction away from the work starts simultaneously with the movement of the punch in the direction away from the work, when a predetermined time has elapsed after the start of the movement of the punch, or when the tip of the punch has reached the surface of the work. The movement of the workpiece is started when the die starts moving in the direction away from the workpiece, or after a predetermined time has elapsed from the start of the movement, or after the movement of the die has been stopped. The approach movement start of the punch is immediately before or at the end of positioning of the workpiece, and the approach movement start of the punch with respect to the workpiece is immediately before or at or immediately after the stop of the approach movement of the die. A work processing method using the punch press according to claim 2.