JP2008221274A - Sheet material processing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet material processing machine in which the errors due to the deviation of the sheet material during turning of the sheet material by a workpiece holder can be reduced and processing accuracy can be improved. <P>SOLUTION: The sheet material processing machine 1 includes a machining head 3 and a sheet material positioning device 4 which has a workpiece holder 9 gripping the end of the sheet material W and positions the sheet material W with respect to the machining head 3. The machine has a first sheet material fixing device 15 for fixing the sheet material W by pressing the sheet material onto a table 3. The sheet material processing machine 1 is provided with a second sheet material fixing device 16 for fixing the sheet material W by pinching both ends thereof by a pair of sheet material pinching members 16a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a plate material processing machine such as a punch press or a laser beam machine, and more particularly to a structure for changing a plate material.

In plate material processing machines such as punch presses and laser processing machines, the edge of the plate material on the table is gripped by the work holder, and the plate material is moved back and forth and left and right by the movement of the work holder, so that the processing part of the plate material relative to the processing head is Position it.
The plate material positioning device has a limited range in which the work holder can be moved. When a long plate material is processed, a holding and changing operation for changing the holding position of the plate material by the whirl holder is required. In this case, if the work holder is simply released, the plate material is unfixed and the position of the plate material is shifted.

For this reason, a plate material fixing device that presses and fixes two points of the plate material with a friction pad on the table is provided, and the work holder is moved and held in the fixed state (referred to as repositioning or the like) (for example, Patent Document 1).
In the example of Patent Document 1, in order to reduce the error at the time of change of the workpiece, the punch tool is not lifted or lowered during the punching process by the punch tool, and the workpiece holder is changed with the workpiece fixed by the punch tool. It has also been proposed.

The plate material bending mechanism is a centering mechanism of the plate material at the time of loading the plate material, but a mechanism for positioning the plate material by sandwiching the plate material from both sides is used (for example, Patent Document 2).
Japanese Patent No. 3658898 JP-A-6-297043

  In the case where the plate material is fixed on the table by pressing the plate material with the friction pad, the error of the gripping position accompanying the holding by the work holder can be reduced to some extent. However, the pressing position by the friction pad is in the vicinity of the machining head, and the holding position of the plate material by the work holder is the position of the edge of the plate material away from the machining head. For this reason, even if the grip portion of the plate material by the work holder is pressed by the friction pad, there is a certain degree of freedom. Due to this freedom, an error may occur when the work holder is moved. This level of error is allowed in general machining, but may not be allowed depending on the required machining accuracy.

The configuration in which the plate material is fixed with a punch tool in the middle of drilling as in Patent Document 1 ensures the fixation of the plate material as compared with the case of only pressing with a friction pad. However, since the fixing of the plate material by the punch tool is the position of the processing head, the above-mentioned error in changing the position of the plate material away from the processing head due to the degree of freedom cannot be eliminated.
Note that the pinching means shown in Patent Document 2 performs centering at the time of loading the plate material, and does not reduce the error at the time of switching.

An object of the present invention is to provide a plate material processing machine capable of reducing an error due to a shift of a plate material when the plate material is changed by a work holder and improving processing accuracy. Another object of the present invention is to make it possible to further reduce the error when changing the holding position, in particular, to reduce the error caused by the degree of freedom of the plate material at a position away from the processing head.
Still another object of the present invention is that the plate material can be fixed regardless of the position of the plate material before the changeover, and even if there is a notch on the left or right side of the plate material, and the error at the time of changeover can be reduced. It is to be.

  The plate material processing machine according to the present invention has a processing head for processing a plate material and a work holder for gripping an end portion of the plate material on the table, and moves the work holder in at least one direction with respect to the processing head. A plate material positioning device for positioning a processing part of the plate material; a first plate material fixing device for pressing the plate material onto the table to fix the plate material; and releasing the grip of the plate material by the work holder in a state in which the plate material is fixed; Plate material change control means for controlling the plate material positioning device and the first plate material fixing device so as to change the plate material by the work holder by sequentially performing the movement of the workpiece and the re-gripping operation by the work holder. A processing machine comprising a second plate material fixing device for fixing the plate material by sandwiching both ends of the plate material with a pair of plate material sandwiching members. And features.

According to this configuration, when the plate material is changed by the work holder, the plate material can be fixed by the second plate material fixing device in addition to the plate material fixed by the first plate material fixing device. For this reason, the fixing of the plate material is ensured, and an error due to the shift of the plate material when the plate material is changed can be reduced. Therefore, it is possible to improve the processing accuracy of the processing after the change.
Since the second plate material fixing device fixes both ends of the plate material by means of a pair of plate material sandwiching members, the plate material is more securely fixed than the fixing structure in which the plate material is pressed onto the table. Can be prevented more reliably. Moreover, since the 2nd board | plate material fixing device is a form clamped from both ends, unlike what presses from upper direction, even if there is no flame | frame etc. which are located above a table, it can install on a table. For this reason, the second plate material fixing device can be installed at a location close to the work holder, which is a location away from the processing head, and from this point, the error at the time of changing the work holder can be further reduced.

In this invention, the plate material positioning device moves the plate material in the one direction and a direction orthogonal to the one direction, and the second plate material fixing device fixes the plate material in the one direction. The first plate material fixing device and the second plate material fixing device are arranged apart from each other in the orthogonal direction so that the first plate material fixing device is located closer to the processing head. It may be what was done.
As described above, the first plate member fixing device and the second plate member fixing device are arranged apart from each other in the direction orthogonal to the moving direction when the plate member positioning device is moved. The degree of freedom of the plate material that cannot be eliminated only by the fixing device, that is, the degree of freedom of the work holder side end of the plate material can be eliminated from the second plate material fixing device, and the error at the time of holding can be more reliably reduced.

In this invention, the second plate material fixing device has a pair of pinching member advancing and retreating mechanisms for advancing and retreating the pair of plate material pinching members in the one direction, respectively, and these pinching member advancing and retreating mechanisms can be positioned independently of each other. It is also good.
If the pair of plate member sandwiching members move in conjunction with each other and move symmetrically, it is necessary to always set the plate member before the change to a fixed position, and the change range is limited. Further, when there is a notch or the like into which the plate member sandwiching member enters at the end portion of the plate member, the fixing by the second plate member fixing device may not be possible. However, if the pair of plate member sandwiching members can be moved independently of each other as described above, the plate member can be fixed by the second plate member fixing device regardless of the position of the plate member before the transfer, and the end of the plate member can be fixed. Even if it is a board | plate material with which the notch etc. produced, the board | plate material can be fixed.

The plate material processing machine according to the present invention has a processing head for processing a plate material and a work holder for gripping an end portion of the plate material on the table, and moves the work holder in at least one direction with respect to the processing head. A plate material positioning device for positioning a processing part of the plate material; a first plate material fixing device for pressing the plate material onto the table to fix the plate material; and releasing the grip of the plate material by the work holder in a state in which the plate material is fixed; Plate material change control means for controlling the plate material positioning device and the first plate material fixing device so as to change the plate material by the work holder by sequentially performing the movement of the workpiece and the re-gripping operation by the work holder. Since the processing machine is provided with a second plate material fixing device for fixing the both ends of the plate material with a pair of plate material sandwiching members. It is possible to reduce the error due to the deviation of the plate at the time of re-holding sheet according to the work holder, thereby improving the machining accuracy.
The plate material positioning device moves the plate material in the one direction and a direction perpendicular to the one direction, and the second plate fixing device fixes the plate material in the one direction, When the first plate fixing device and the second plate fixing device are arranged away from each other in the orthogonal direction so that the first plate fixing device is located closer to the processing head. Further, it is possible to further reduce the error at the time of holding, particularly to reduce the error due to the degree of freedom of the plate material at a position away from the processing head.
When the second plate material fixing device has a pair of pinching member advancing and retreating mechanisms for advancing and retreating the pair of plate material pinching members in the one direction, and these pinning member advancing and retreating mechanisms can be positioned independently of each other The plate material can be fixed regardless of the position of the plate material before the transfer, and even when there is a notch on the left or right side of the plate material, it is possible to reduce the error at the time of the change.

  An embodiment of the present invention will be described with reference to FIGS. This plate material processing machine is applied to a turret punch press. The plate material processing machine 1 includes a processing head 3 that processes the plate material W on the table 2 and a processing head 3 that moves the plate material W in one direction (X direction) and its orthogonal direction (Y direction). And a plate material positioning device 4 for positioning a processed portion of the plate material W.

  The processing head 3 is composed of a ram that lifts and lowers a punch tool (not shown), and is provided at the front end of the upper frame portion 5 a in the frame 5. In the drawing, the frame 5 is covered with a body cover, but in this specification, the frame including the machine cover covering the frame 5 is referred to as a frame. The frame 5 has a pair of upper and lower turrets 6 (only the upper turret is shown), and a punch tool and a die tool are supported on outer peripheral portions of the upper and lower turrets 6 respectively. In the upper and lower turrets 6, an arbitrary punch tool and die tool are indexed at a processing position P that is the center of the processing head 3 by a turret indexing mechanism (not shown).

  The plate material positioning device 4 includes a carriage 7 that moves back and forth (Y direction) on the rail 26 of the lower frame 5b, and a cross slide 8 that is mounted on the carriage 7 and moves in the left and right direction (X-axis direction). A plurality of work holders 9 holding the end of the plate material W are attached to the cross slide 8 side by side. The carriage 7 and the cross slide 8 are driven forward and backward through the ball screw mechanisms 12 and 13 by the servo motors 10 and 11 of the respective axes. The work holder 9 holds the plate material W in the vertical direction and is opened and closed by an open / close drive source (not shown) such as an air cylinder.

  As shown in FIG. 2, the table 2 includes a central fixed table 2a and left and right slide tables 2b. The left and right slide tables 2 b are integrated with the carriage 7 and move back and forth together with the carriage 7. At one end in the left-right direction (X direction) of the table 2, an end locator 14 that presses and positions the end of the plate material W when the plate material W is loaded is provided so as to protrude and retract with respect to the upper surface of the table 2.

In the plate material processing machine 1 having the above-described basic configuration, a first plate material fixing device 15 and a second plate material fixing device 16 are provided for fixing the plate material W when the work holder 9 is moved.
The first plate material fixing device 15 is a device that fixes the plate material W by pressing the plate material W onto the table 2 by the friction pad 15a. Two friction pads 15a are provided and moved up and down by a lifting drive source (not shown) such as a hydraulic cylinder or an air cylinder. Each lifting drive source is installed on the upper frame portion 5 a of the frame 5. The two friction pads 15 a are arranged separately on the left and right sides of the machining head 3, and are arranged away from the machining head 3 toward the work holder 9 so as not to interfere with the turret 6.

  The 2nd board | plate material fixing device 16 pinches | interposes the board | plate material W in the left-right direction (X direction) with a pair of board | plate material clamping member 16a, and fixes it. The first plate fixing device 15 and the second plate fixing device 16 are arranged away from each other in the front-rear direction Y so that the first plate fixing device 15 is located closer to the processing head 3. ing. In the illustrated example, the second plate material fixing device 16 is arranged in the vicinity of the work holder 9 in the table 2 in the front-rear direction Y. The left and right plate member sandwiching members 16 a are disposed on the left and right slide tables 2 b in the table 2.

  The plate clamping member 16a of the second plate fixing device 16 protrudes from the slit 17 provided along the left-right direction on the slide table 2b of the table 2 so as to protrude into the table upper surface, and the inside of the slit 17 extends in the longitudinal direction. It is movable.

  Each plate member sandwiching member 16a can be moved back and forth in the left-right direction by the sandwiching member advancing and retracting mechanism 18 shown in FIG. 3, and the projecting and retracting mechanism 23 projects and retracts from the slit 17 to the table upper surface. The sandwiching member advancing / retracting mechanism 18 is configured by installing a plate member sandwiching member 16 a via a projecting / retracting mechanism 23 on an advancing / retreating base 21 installed on a rail 19 via a linear motion rolling bearing 20. The advance / retreat platform 21 is advanced / retreated by an advance / retreat drive source 22 such as a rodless cylinder. The rail 19 is installed on the table support frame 24 of the table 2, and the slit 17 is provided on the table top plate of the table 2.

  Both the pinching member advancing / retreating mechanisms 18 can be positioned independently of each other. Specifically, for example, a sensor (not shown) for detecting the resistance in the pressing direction of the plate member sandwiching member 16a is provided, and when a resistance greater than a set value is detected during movement in the sandwiching direction, the advance / retreat drive source 22 Control to stop the operation at the current position is performed. When the advance / retreat drive source 22 is composed of a servo motor and a ball screw, the current position may be maintained by stopping the advance according to the torque value detected by the servo system instead of the sensor.

The protrusion / subtraction mechanism 23 is composed of a fluid pressure cylinder, an electromagnetic solenoid or the like. Move up and down. The table 2 is provided with a plate material sliding member 25 made of a brush, a freely rotating ball, or the like dispersed on the upper surface thereof, and the plate material sandwiching member 16a is a plate material placed on the plate material sliding member 25 at the protruding position. It protrudes higher than the upper surface of W.
3 shows the plate member 16a on the right side of FIGS. 1 and 2, and the plate member 16a is inverted so that it cantilevered from the slide table 2b to above the fixed table 2a. Although it is provided in a letter shape, the left plate member sandwiching member 16a in FIGS. 1 and 2 has a shape that simply extends upward from the projecting and retracting mechanism 23.
Moreover, the 2nd board | plate material fixing device 16 shown in FIG. 3 is the example, and the thing of various other structures can be employ | adopted for the board | plate material fixing device 16. FIG.

  In FIG. 1, the processing machine control device 27 is a device that controls the entire plate material processing machine main body, which is a portion excluding the control system of the plate material processing machine 1. The processing machine control device 27 is configured by a computer-type numerical control device and a programmable controller, and decodes and executes a processing program (not shown). The processing machine control device 27 is provided with a holding control means 28 for performing a series of controls when the workpiece holder 9 is changed. The holding control means 28 may give individual operation commands by a machining program, or may execute a series of sequence programs in the programmable controller and give individual operation commands by a changing command by the machining program. good.

  The holding control means 28 basically fixes the plate material W by the first plate fixing device 15, releases the plate material gripping by the work holder 9 in this state, moves the work holder 9 to the holding position, Each operation of re-gripping the plate material W by the holder 9 is performed in order. This operation is controlled by adding the operation of the second plate material fixing device 16.

  That is, as will be described later with reference to FIG. 3, the holding control means 28 fixes the plate material W by the first plate material fixing device 15 and fixes the plate material W in the sandwiched state by the second plate material fixing device 16. Release the gripping of the plate material by the work holder 9, move the work holder 9 to the holding position, re-hold the plate material W by the work holder 9, and fix the first plate material fixing device 15 and the second plate material fixing device 16. Each release operation is performed in order.

  The operation of changing the work holder 9 with the above configuration will be described with reference to FIG. When changing the position, after positioning the front / rear / right / left positions of the plate material W by the plate material positioning device 4 to appropriate positions (as determined by the processing program according to the processing), first, as shown in FIG. The friction pad 15a of the first plate material fixing device 15 is lowered from the rising standby position to fix the plate material W on the table 2 in a pressed state. At this time, the plate material sandwiching members 16a on both sides of the second plate material fixing device 16 are in the standby positions separated from each other and sunk under the table.

  Thereafter, as shown in FIG. 5B, the both plate material sandwiching members 16a of the second plate material fixing device 16 protrude on the table 2 and approach each other, thereby fixing the both ends of the plate material W therebetween. When each of the plate member sandwiching members 16a hits the plate member W, the resistance is detected as described above and stops at that position. Therefore, even if the distance between the end positions on both the left and right sides of the plate material W and the plate material sandwiching members 16a is different from each other, the plate material W can be appropriately sandwiched. Moreover, even if the notch (not shown) etc. which the board | plate material clamping member 16a fits into the edge part of the both right and left sides of the board | plate material W have produced, the board | plate material W can be inserted | pinched appropriately.

  In this way, in a state where the plate material W is fixed by the first plate material fixing device 15 and the second plate material fixing device 16, the gripping of the plate material W by the work holder 9 is released, and the work holder as shown in FIG. 9 is moved in the X direction. After this movement, the plate material W is again gripped by the work holder 9. In this way, after the plate material W is changed by the work holder 9, the second plate material fixing device 16 is returned to the standby position and the first plate material fixing device 15 is returned to the standby position. The changeover operation is completed. Any one of the first and second plate material fixing devices 15 and 16 may be returned first.

According to this plate material processing machine 1, in addition to fixing the plate material W by the first plate material fixing device 5, the plate material W is fixed by the second plate material fixing device 16. Therefore, the fixing of the plate material W is ensured, and an error due to the shift of the plate material W when the plate material is changed can be reduced. Therefore, it is possible to improve the processing accuracy of the plate material W after the change.
In this case, the first plate material fixing device 15 fixes the plate material W in the vicinity of the machining head 3, and the second plate material fixing device 16 is in a free state only by fixing by the first plate material fixing device 15. Since the vicinity of the holder 9 is fixed, it is possible to further reliably reduce the error at the time of holding.
Since the second plate material fixing device 16 fixes the plate material 16a by sandwiching both ends of the plate material 16a with a pair of plate material sandwiching members 16a, the plate material can be fixed more securely than the fixing structure in which the plate material W is pressed onto the table 2. Thus, the displacement of the plate material can be prevented more reliably. Moreover, since the 2nd board | plate material fixing device 16 is a form clamped from both ends, unlike what presses from the upper direction like the 1st board | plate material fixing device 15, it can be installed in the table 2 and it is located in the upper direction. Therefore, there is no need for a mounting member such as the upper frame 5a. Therefore, the second plate material fixing device 16 can be installed at a location close to the work holder 9 which is a location away from the processing head 6.

In the above-described embodiment, the second plate material fixing device 16 sandwiches the plate material W in the left-right direction (X direction). For example, as illustrated in FIG. 5, the pair of plate material sandwiching members 16 a is disposed in the front-rear direction. It is good also as what provides and fixes the board | plate material W from front and back. Moreover, as shown in FIG. 6, it is good also as what provides the board | plate material sandwiching member 16a in the front-back direction and the left-right direction, respectively, and fixes the board | plate material W from front-back and left-right. In that case, the plate material W can be more reliably fixed, and the error at the time of switching can be further reduced.
Further, as shown by a solid line in FIG. 7, when the second plate material fixing device 16 is configured to sandwich the plate material W in the left and right direction (X direction), the left and right plate material sandwiching members 16a and 16a are displaced from each other back and forth. Also good. Further, as shown in FIG. 7 with addition of a one-dot chain line, the second plate material fixing device 16 may be provided with two pairs of left and right plate material sandwiching members 16a, 16a arranged side by side. In this case, the plate member sandwiching members 16a, 16a at the same position in the front-rear direction form one pair.
Other configurations in each of these embodiments are the same as those of the first embodiment shown in FIGS.

Moreover, although the said embodiment demonstrated the case where the 2nd board | plate material fixing device 16 was installed in the slide table 2b in the table 2, the table 2 may consist only of a fixed table, The fixed table may be sufficient as it. A second plate material fixing device 16 may be provided.
Furthermore, although the case where it applied to a punch press was demonstrated in the said embodiment, this invention can be applied to a laser beam machine and other board | plate material processing machines generally.

It is a perspective view of the board | plate material processing machine concerning one Embodiment of this invention. It is a fracture | rupture top view of the same board | plate material processing machine. It is the expansion fracture side view and the expansion fracture front view of the 2nd board material fixing device in the board material processing machine. It is explanatory drawing of the holding change operation | movement of the same board | plate material processing machine. It is a fragmentary top view of the board | plate material processing machine which concerns on other embodiment of this invention. It is a fragmentary top view of the board | plate material processing machine which concerns on other embodiment of this invention. It is a fragmentary top view of the board | plate material processing machine which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Plate material processing machine 2 ... Table 2a ... Fixed table 2b ... Slide table 3 ... Processing head 4 ... Plate material positioning device 5 ... Frame 6 ... Turret 7 ... Carriage 8 ... Cross slide 9 ... Work holder 15 ... 1st plate material fixing device 15a ... friction pad 16 ... second plate material fixing device 16a ... plate material pinching member 17 ... slit 18 ... pinching member advance / retreat mechanism 19 ... rail 23 ... projecting / retracting mechanism 27 ... processing machine control device 28 ... changeover control means W ... plate material

Claims (3)

  A plate having a processing head for processing the plate and a work holder for gripping an end of the plate on the table, and positioning the processing portion of the plate with respect to the processing head by moving the work holder in at least one direction Positioning device, first plate material fixing device that presses the plate material onto the table and fixes the plate material, and release of gripping of the plate material by the work holder, movement of the work holder, re-gripping by the work holder while the plate material is fixed A plate material processing machine comprising: a plate material change control means for controlling the plate material positioning device and the first plate material fixing device so as to change the plate material by the work holder by performing each of the operations in order, A plate material processing machine provided with a second plate material fixing device for fixing both ends of the plate material by means of a plate material sandwiching member   The plate material positioning device moves the plate material in the one direction and a direction perpendicular to the one direction, and the second plate fixing device fixes the plate material in the one direction, The first plate material fixing device and the second plate material fixing device are arranged apart from each other in the orthogonal direction so that the first plate material fixing device is located closer to the processing head. 1. The plate material processing machine according to 1.   The second plate material fixing device includes a pair of pinching member advancing and retreating mechanisms that respectively advance and retract the pair of plate material pinching members in the one direction, and the pinching member advancing and retreating mechanisms can be positioned independently of each other. The plate material processing machine according to claim 1 or 2.

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