JP3462913B2 - Sheet material processing method and sheet material processing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for processing a plate material such as a punch press, a shearing machine and a bending machine.
Method and plate processing machine.

[0002]

2. Description of the Related Art In a plate material processing machine such as a punch press, while a plurality of clamping devices grip the y-axis end portion of the plate material, the carriage is moved in the x-axis and y-axis directions to move and position the plate material. A desired punching process is performed on the plate material by the punching process section. When punching is performed, a dead zone (unworkable region) is created in the plate material so that the punch (upper die) in the punching unit and the clamp device do not interfere with each other. Therefore, in order to avoid the dead zone, conventionally, each clamp device is configured to be swingable in the horizontal direction to avoid the dead zone by operating the avoiding cylinder.

[0003]

However, in the prior art, a predetermined number of clamping devices are uniformly swung horizontally by the operation of the avoiding cylinders, so that the clamping devices are avoided when the plate material is small in size. Then, the plate material is in a state of being gripped by only one clamp device. Therefore, there is a problem that the plate material cannot be gripped with a sufficient gripping force, the plate material cannot be accurately moved and positioned, and the product accuracy deteriorates.

Therefore, in order to solve the above problems, the present invention is a plate material capable of clamping a work with a sufficient gripping force even if the clamp device is horizontally swung in order to avoid a dead zone. An object is to provide a processing method and a plate material processing machine.

[0005]

In order to solve the above-mentioned conventional problems, as the first means in the present invention, the x-axis origin positioning member capable of abutting the x-axis side end face of the plate material on the table. And at least three clamp devices for gripping the end portion of the plate material on the y-axis side are provided on the carriage provided on the table so as to be movable and positionable in the x-axis and y-axis directions.
Each clamp device is configured to be swingable in a horizontal direction to avoid a dead zone by operating an avoidance cylinder, and each clamp device is provided with a y-axis origin positioning member capable of abutting the y-axis side end surface of the plate material. In this plate material processing machine, the x-axis side end surface of the plate material is abutted against the x-axis origin positioning member, and the y-axis side end surface of the plate material is abutted against the y-axis origin positioning member, whereby the origin position in the x-axis and y-axis directions is obtained. The plate material is positioned at the origin, and the number of clamping devices equipped with the y-axis origin positioning member with which the y-axis side end surface of the plate abuts is detected, and from this detected number of clamping devices, the minimum required clamping device for clamping. Number (limited to 2 or more
) Is determined as the number of avoidable clamp devices , and after determining the number of avoidable clamp devices, only if the number of avoidable clamp devices is not zero.
Therefore, within a range that does not exceed the number of avoidable clamp devices, it is determined based on the processing information whether or not an appropriate clamp device is swung in the horizontal direction to avoid the dead zone. Swing in the horizontal direction above
Only when it is determined that the plate processing machine is used, the appropriate clamping device is swung in the horizontal direction to avoid the dead zone by the operation of the corresponding avoiding cylinder.
A plate material processing method for processing a plate material, further comprising:
After swinging the clamp device in the horizontal direction above,
Y-axis in the appropriate clamp device even after returning to
The y-axis side end surface of the plate does not hit the origin positioning member.
In this case, reduce the number of avoidable clamp devices by one.
It is characterized by continuing to process the plate material .

As a second means, a table is provided with an x-axis origin positioning member capable of abutting the end face of the plate material on the x-axis side, and the carriage is provided on the table so as to be movable and positionable in the x-axis and y-axis directions. At least three clamping devices for gripping the y-axis side end of the plate device are provided, and each clamping device is configured to be swingable in the horizontal direction so as to avoid the dead zone by the operation of the avoidance cylinder. In a plate material processing machine comprising y-axis origin abutting members whose axis-side end surfaces can abut, respectively, the x-axis side end surface of the plate material is the x-axis origin positioning member, and the y-axis side end surface of the plate material is the y-axis. When the plate material is positioned at the origin position in the x-axis and y-axis directions by abutting on the origin positioning members, the y-axis side end surface of the plate material hits each y-axis origin positioning member. A clamping device provided with y-axis abutting sensors for detection and provided with a y-axis origin positioning member that abuts the y-axis side end surface of the plate when the plate is origin-positioned at the origin in the x-axis and y-axis directions. From the number of pieces, the minimum number of clamp devices required for clamping (limited to two or more
That) and determines as a number of avoidable clamping device the number obtained by subtracting the number of avoidable clamping device 0
Only when it is not , provided is a calculation unit that determines whether or not to appropriately swing the appropriate clamp device in the horizontal direction to avoid the dead zone based on the processing information within a range that does not exceed the number of avoidable clamp devices. , The appropriate clamp above
Only when it is determined to swing the device in the horizontal direction
Ri, so as to swing the appropriate clamping device in the horizontal direction to avoid dead zones, and each other to provide a controller for operating the corresponding one of said avoidance cylinder, further, the operation
The section swings the appropriate clamp device in the horizontal direction.
Even if it is returned to the original position after the
Depending on the sensor, the y-axis original in the appropriate clamping device
The y-axis side end face of the plate has hit the point positioning member.
If the above is not detected,
It is characterized in that it can be changed so as to reduce the number by one .

[0007]

With the above structure, the y-axis origin positioning member is y
The carriage is moved in the y-axis direction so as to be located at the axis origin position, and the carriage is moved in the x-axis direction approaching the x-axis origin positioning member. Next, the x-axis side end surface of the plate material is abutted against the x-axis origin positioning member, and the y-axis side end surface of the plate material is abutted against the y-axis origin positioning member, whereby the plate material
The origin can be positioned at the origin position in the y-axis direction.
At this time, since it is detected by the appropriate abutment sensor that the y-axis side end face of the plate material is in contact with the corresponding y-axis origin positioning member, the y-axis origin positioning in which the y-axis side end face of the plate material is in contact. The number of clamping devices with members is detected.

After detecting the number of clamping devices provided with the y-axis origin positioning member against which the y-axis side end face of the plate material abuts, the computing unit determines the minimum required clamping amount based on the detected number of clamping devices. The number obtained by subtracting the number of clamp devices is determined as the number of avoidable clamp devices. Then, the arithmetic unit determines whether or not the appropriate clamp device is rocked in the horizontal direction so as to avoid the dead zone, based on the processing information, within a range that does not exceed the determined number of clamp devices.

After the above determination is made by the computing unit, the control unit operates the appropriate avoiding cylinder to swing the clamp device which is determined to be swung in the horizontal direction so as to avoid the dead zone, and at the same time, the plate material processing is performed. Machine the plate material.

Here, the appropriate clamp device is connected to the water.
Even if you swing it in the horizontal direction and then return it to its original position,
A plate is used as the y-axis origin positioning member in an appropriate clamp device.
The above can be avoided if the end face of the material on the y-axis side does not hit.
Reduce the number of different clamping devices by one and continue plate material processing
To do.

[0011]

Embodiments of the present invention will now be described with reference to the drawings.

Referring to FIGS. 2 and 3, a turret punch press 1 as an example of a plate material processing machine is based on a bridge-type main body frame 3.
Includes an upper frame 5 and a lower frame 7 which are vertically opposed to each other.

A disc-shaped upper turret 9 is rotatably provided on the upper frame 5 via a rotary shaft 11, and a lower turret 13 vertically opposed to the upper turret 9 has a rotary shaft 15 on the lower frame 7. It is provided rotatably through. The upper and lower turrets 9 and 13 are synchronously rotated by a predetermined angle in the same direction by appropriately operating a turret rotating device (not shown) such as a servo motor.

A large number of upper molds (punches) 17 and lower molds 19 having various sizes are attached to the upper and lower turrets 9 and 13 in a removable manner. In order to punch the plate material W, a ram 21 is provided near the center of the upper frame 5 so as to be able to move up and down by the operation of a ram cylinder 22.

A fixed table 23 for supporting the plate material W is provided on the lower frame 7, and a movable table is provided on both sides of the fixed table 23 (left and right in FIG. 2 and the front and back sides in FIG. 3). 25 and 27 are provided so as to be movable in the front-rear direction (downward and upward direction in FIG. 2, left and right direction in FIG. 3), in other words, the y-axis direction, by driving the servomotor M1. The fixed table 23 and the movable tables 25 and 27 are provided with a large number of free bearings 29 that rotatably support the plate material W.

The movable table 25 is provided with an x-axis origin positioning member 31 capable of abutting the x-axis side end surface (left side end surface) of the plate material W. The x-axis origin positioning member 31 is operated by the lifting cylinder 33. It is configured to be able to move up and down (see FIGS. 4A and 4B).

Then, the x-axis origin positioning member 31 is raised and protrudes with respect to the height position of the free bearing 29, or the x-axis origin positioning member 29 is lowered and with respect to the height position of the free bearing 29. In order to detect the immersion, an elevation detection limit switch 35 is provided at an appropriate position on the left side of the movable table 25 (Fig. 4 (a),
(See (b)). It is desirable to provide an x-axis abutting detection limit switch (not shown) for detecting that the left end face of the plate material W has abutted on the x-axis origin positioning member 31.

Referring to FIG. 1, the movable table 2 is described above.
5 and 27 are provided with a plate material moving / positioning device 37 for moving and positioning the plate material W in the x-axis direction (horizontal direction) and the y-axis direction.

That is, the carriage base 39 is located on the front side of the movable tables 25 and 27 (lower side in FIGS. 1 and 2).
This carriage base 3 is provided by stretching in the axial direction.
In FIG. 9, a carriage 41 is provided so as to be movable in the x-axis direction by the operation of the servomotor M2. The carriage 41 is provided with a plurality (at least one, four in this embodiment) of clamping devices 43a, 43b, 43c, 43d for clamping the end (front end) of the plate W on the y-axis side. .

With the above construction, after the plate material W is positioned at the origin position in the x-axis and y-axis directions and the x-axis side end portion of the plate material W is clamped by the clamp device 43, the servo motor M1
Drive the carriage 41 to move the movable table 25, 27
The carriage 41 is moved integrally with the y-axis direction, and the carriage 41 is moved in the x-axis direction by driving the servomotor M2. As a result, the plate material W can be moved and positioned in the x-axis and y-axis directions so that a predetermined processed portion of the plate material W can be positioned vertically below the ram 21.

While performing the above-mentioned movement and positioning of the plate material W,
The upper turret 9 and the lower turret 13 are synchronously rotated in the same direction to position the predetermined molds 17 and 19 at the vertically lower position of the ram 21, and the ram 21 is lowered by the operation of the ram cylinder 22. By repeating the above action,
A desired punching process can be performed on the processed portion of the plate material W.

The plate material moving / positioning device 37 will be described in detail. The clamp devices 43a, 43b, 43c, 43d in the plate material moving / positioning device 37 are configured to be swingable in the forward direction to avoid the dead zone. Since each of the clamp devices 43a, 43b, 43c, 43d is configured to be swingable in the front-rear direction, the carriage 41 is provided with a plurality of (four in this embodiment) swing links 45a, 45b, which are swingable in the front-rear direction. 45c and 45d are provided via a hinge pin 47, and the swing links 45a, 45b and 45 are provided.
Clamp device 43a, 43 to which one end of c, 45d corresponds
It is connected to b, 43c and 43d through a connecting pin (not shown). Each swing link 45a, 45b, 45c, 4
In order to swing 5d in the front-rear direction, a plurality of (four in this embodiment) avoidance cylinders 49a, 49 are provided in the carriage 41.
b, 49c and 49d are provided so as to be swingable in the front-rear direction via hinge pins 51, and the avoidance cylinders 49a and 49d are provided.
The piston rod 53 of b, 49c, 49d is connected to the other end of the corresponding swing link 45 via a connecting pin.

Each of the clamp devices 43a, 43b, 43c,
43d is an upper clamp jaw 55 that is swingable in the vertical direction (front and back directions toward the paper surface in FIGS. 1 and 2), a lower clamp jaw 57 that vertically opposes the upper clamp jaw 55, and the upper clamp jaw. Clamp cylinder 59 (59a, 59a) for swinging 55 up and down
b, 59c, 59d). The plurality of clamp cylinders 59a, 59b, 59c, 59d are connected to a common air source 61 via an air circuit 63, and a pressure switch 65 for detecting clamping is arranged in this air circuit 63. It is set up.

Further, each of the clamp devices 43a, 43b, 4
3c and 43d are y-axis origin positioning members 67a, 67b and 6 which allow the y-axis side end surface (front side end surface) of the plate material W to abut between the upper clamp jaw 55 and the lower clamp jaw 57.
7c, 67d, and each clamp device 43
a, 43b, 43c, 43d are y-axis abutting detection limit switches 69a, 69b, 69c for detecting that the front end face of the plate material W has abutted on the corresponding y-axis origin positioning members 67a, 67b, 67c, 67d. , 69d.

Referring to FIG. 5, four clamp devices 4
The turret punch press 1 is provided with a dead zone avoiding control means 71 for swinging only a predetermined clamp device 43 among 3a, 43b, 43c, 43d in the forward direction to avoid the dead zone. Is provided with a control unit 73, a calculation unit 75, and a storage unit 77 that have the operations described below. The control unit 73 includes a plurality of limit switches 35, 69a, 69b, 69c, 69d, a pressure switch 65, a plurality of avoidance cylinders 49a, 49b, 49c,
49d is electrically connected. In addition, this control unit 71
An avoidance switch 79 and a punch operation switch 81 are electrically connected to the. The avoidance cylinder 49 operates only when the avoidance switch 79 is in the ON state.
Only when the punch operation switch 81 is in the ON state, the ram cylinder 22 is actuated to drive it downward.

An outline of this embodiment based on the above-mentioned structure will be described with reference to the flow charts shown in FIGS.

The avoidance flag F = 0 is written in the storage unit 77, and the avoidance switch 79 is turned on (steps 1 and 2 in FIG. 6). Further, by controlling the drive of the servo motor M1, the carriage 41 is moved so that the y-axis positioning member 67 is located at the y-axis origin position.
The carriage 41 is moved in the y-axis direction integrally with 27, and the servo motor M2 is driven and controlled, thereby moving the carriage 41 in the x-axis direction approaching the x-axis origin positioning member 31.

After moving the carriage 41 in the x-axis and y-axis directions, the x-axis origin positioning member 31 is made to project with respect to the height position of the free bearing 29, whereby the lift detection limit switch 35 is turned off. (Fig. 4
(B)), when the pressure switch 65 is in the OFF state (steps 4 and 5), the x-axis side end face of the plate material W is the x-axis origin positioning member 31, and the y-axis side end face of the plate material W is the y-axis. By abutting the origin positioning member 67, the plate material W
The origin can be positioned at the origin in the axis and y-axis directions.

After the plate material W is positioned at the origin, the clamp cylinder 59 operates to clamp the y-axis side ends of the plate material W by the plurality of clamping devices 43, and the pressure switch 65 is turned on (step 5). At this time, four y-axis abutting detection limit switches 69a, 69b,
When it is detected that the rightmost limit switch 69d of 69c and 69d (the side away from the x-axis origin positioning member 31) is turned on (step 6), the four y-axis origin positioning members 67a and 67b are detected. , 67c, 67d, the end surface of the plate W on the y-axis side is detected. That is, the number (4) of the clamp devices 43 including the y-axis origin positioning member 67 with which the y-axis side end surface of the plate material W abuts is detected.

After detecting the number (4) of the clamp devices 43, the calculation unit 75 calculates under F = F + 1,
F = 0 + 1 = 1 is rewritten in the storage unit 77 (step 7). Then, the rightmost clamp device 43d of the four clamp devices 43a, 43b, 43c, and 43d is rewritten in the storage unit 77 as a swingable state (step 8). After step 8 is completed, the calculation unit 75 calculates under F = F + 1, and the storage unit 77
F = 1 + 1 = 2 is rewritten to (step 9). Then, the three clamp devices 43 are appropriately stored in the storage unit 77.
It is rewritten that a, 43b and 43c are in a swingable state (step 9). That is, in steps 7 and 9, the number (2) obtained by subtracting the minimum number (2 in this embodiment) of the clamp devices 43 required for clamping from the number (4) of the clamp devices 43 detected in step 6 Can be determined as the number of avoidable clamping devices 43.

On the other hand, when the limit switch 69d is not turned on in step 6 but the limit switch 69c is turned on (step 11), the three y-axis origin positioning members 67 are detected.
It is detected that the end surface on the y-axis side of the plate material W abuts on a, 67b, 67c. That is, the number (three) of the clamp devices 43 including the y-axis origin positioning member 67 with which the y-axis side end surface of the plate material W abuts is detected.

After detecting the number of clamp devices 43 (three), the calculation unit 75 calculates under F = F + 1,
F = 0 + 1 = 1 is rewritten in the storage unit 77 (step 9). Then, any one of the three clamp devices 43a, 43b, and 43c is rewritten in the storage unit 77 so that it can swing (step 9). That is, in step 9, the number (1) obtained by subtracting the minimum number (2) of the clamp devices 43 required for clamping from the number (3) of the clamp devices 43 detected in step 11 can be avoided. It can be determined as the number of the clamp devices 43.

If the determinations at step 2, step 3 and step 4 are NO, the memory unit 77 returns 4
The individual clamp devices 43a, 43b, 43c, 43d are rewritten so that they cannot swing.

After the number of the avoidable clamp devices 43 is determined to be, for example, two (F = 2), the clamp device 43b is moved by locating a predetermined work part of the plate W at the vertically lower position of the ram 21. When entering the dead zone, steps 1, 2,
Processing information (plate material W
It is determined whether to avoid the clamp device 43b based on the predetermined current position of the processed portion in (1). Then, the avoiding cylinder 49b is appropriately operated by the control unit 73 to move the clamp device 43b to the swing link 45.
It swings in the forward direction via b to avoid the dead zone (step 5). The limit switch 69b is OF
Switch to F.

Then, punching is performed on the portion to be processed in the plate material W, and the control unit 73 and the avoiding cylinder 49 are used.
By the action of b, the clamp device 49b is swung backward and returned to the original position (step 6). As a result, the limit switch 69b is turned on again,
Two clamping devices 43 can be avoided (step 7). On the other hand, when the portion of the plate material W that is being gripped by the clamp device 43b is cut out by punching, the limit switch 69b remains in the OFF state even if the clamp device 43b is returned, and the clamp device 43b will not be used afterwards. It is treated that W is not gripped (steps 7 and 8), and is calculated by the calculation unit 75 under F = F−1.
-1 = 1 is set (step 9).

After step 7 or step 9 is completed, it is judged in step 10 whether F = 0 or not, and since F = 0 is not satisfied, step 1 is feed-packed. Note that after the feed packed in Step 1, when it is determined that F = 0 in step 10, but to continue the operating state of the turret punch pre scan 1, the Isure of the clamping device 43 enters the dead zone The operating state of the turret punch press 1 is stopped.

When the clamp device 43c enters the dead zone, steps 1, 2, 3, 4,
Punching is performed by bypassing the clamp device 43c via step 5 (step 11), and the clamp device 43c is returned (steps 12, 13, 14). Also, when the clamp device 43a enters the dead zone, Is clamp device 43a via steps 1, 2 and 3.
And punching is performed (step 4),
Return the clamp device 43a (steps 15 and 1).
6, 17).

Further, when the clamp device 43d enters the dead zone, steps 1, 2, 3, 4,
Avoid the clamp device 43d via 5, 11,
Punching is performed (step 18), and the clamp device 43d is returned (steps 19, 20, 21).

According to this embodiment, an appropriate clamp device 4
Even when 3 is swung in the horizontal direction to avoid the dead zone, the y-axis side end of the plate material is gripped by the minimum necessary number of clamp devices 43 (two in this embodiment). Therefore, the plate material W can be clamped with a sufficient gripping force. Therefore, the plate material W can be accurately positioned, and the product accuracy is improved.

[0040]

As will be understood from the above description of the embodiments, according to the present invention, even if the appropriate clamp device is horizontally swung to avoid the dead zone, the minimum Since the necessary number (two or more) of clamping devices are used to grip the end of the plate material on the y-axis side, the plate material can be clamped with a sufficient gripping force. Therefore,
The plate material can be accurately positioned and the product accuracy is improved.

[Brief description of drawings]

FIG. 1 is a plan view of a plate material movement positioning device.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a side view of a turret punch press.

FIG. 4 is an operation diagram of an x-axis origin positioning member.

FIG. 5 is a block diagram of dead zone avoiding control means.

FIG. 6 is a flowchart showing the operation of the present embodiment.

FIG. 7 is a flowchart showing the operation of this embodiment.

[Explanation of symbols]

1 Turret punch press 25 movable table 31 x-axis origin positioning member 43 Clamp device 49 Avoidance cylinder 67 y-axis origin positioning member

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) B21D 28/36 B21D 43/00 B21D 43/10

Claims (2)

(57) [Claims] 1. An x-axis origin positioning member capable of abutting an x-axis side end surface of a plate member on a table, and the table is provided with an x-axis origin positioning member.
At least three clamp devices that grip the end of the plate on the y-axis side are provided on the carriage that can be moved and positioned in the axial and y-axis directions, and each clamp device is moved horizontally to avoid the dead zone by operating the avoiding cylinder. In a plate material processing machine that is configured to be swingable, and each clamp device is provided with a y-axis origin positioning member that is capable of abutting the y-axis side end surface of the plate material. By abutting the y-axis side end surface of this plate material on the positioning member to the y-axis origin positioning member, the plate material is positioned at the origin position in the x-axis and y-axis directions, and the y-axis side end surface of the plate material abuts. detecting a number of clamping device provided with a y-axis origin positioning member are, the number of minimum required clamping device to clamp the number of the detected clamping device (limited to two or more) The number obtained by subtracting, after determining the number of avoidable clamping device, to determine the number of avoidable clamping device, avoiding Allowed
Only when the number of effective clamp devices is not 0, whether or not an appropriate clamp device is horizontally swung based on the processing information within a range that does not exceed the avoidable clamp device. If the appropriate clamping device is rocked in the horizontal direction,
Only when the judgment is made, while the appropriate clamp device is swung in the horizontal direction to avoid the dead zone by the operation of the corresponding avoidance cylinder , the plate material processing machine applies the plate material.
A method of processing a plate material, further comprising swinging the appropriate clamp device in the horizontal direction.
Even after returning to the original position after
The y-axis side end face of the plate is
If it does not hit,
Change to reduce the number by 1 and continue plate material processing
A plate material processing method characterized by the above. 2. An x-axis origin positioning member capable of abutting an x-axis side end surface of a plate member on the table, and the table is provided with an x-axis origin positioning member.
At least three clamp devices that grip the end of the plate on the y-axis side are provided on the carriage that can be moved and positioned in the axial and y-axis directions, and each clamp device is moved horizontally to avoid the dead zone by operating the avoiding cylinder. In a plate material processing machine, each of which is configured to be swingable, and each clamp device includes a y-axis origin abutment member capable of abutting the y-axis side end surface of the plate material. By making the y-axis side end surface of this plate abut on the origin positioning member and the y-axis origin positioning member, the y-axis origin positioning member is positioned when the plate is positioned at the origin position in the x-axis and y-axis directions. The y-axis abutting sensors that detect when the end surface of the plate material on the y-axis side abuts are provided respectively. When the plate material is positioned at the origin position in the x-axis and y-axis directions, the end surface of the plate material on the y-axis side is positioned. From the number of the clamping device provided with a y-axis origin positioning member which are abuts against, determined as the number of avoidable clamping device the number obtained by subtracting the number of minimum required clamping device to the clamp (only 2 or more) Also, if the number of avoidable clamping devices is not zero
As far as, in the range not exceeding the number of avoidable clamping device, provided with a calculation unit for determining whether to swing in the horizontal direction to avoid dead zone a suitable clamping device on the basis of the processing information, the When an appropriate clamp device is swung in the horizontal direction,
Only when it is determined, a control unit for activating the corresponding avoiding cylinder is provided so as to swing the appropriate clamp device in the horizontal direction to avoid the dead zone, and further, the arithmetic unit is configured to operate as described above. Attach an appropriate clamp device to the water
It is possible to return to the original position after swinging in the horizontal direction.
The appropriate clamp device by the y-axis butting sensor
At the y-axis origin positioning member in
The above workaround is possible when a hit is not detected.
Configurable to reduce the number of clamping devices by 1.
A plate material processing machine characterized by being used.