TWI584909B - Fixed fixture - Google Patents

Description

Workpiece fixing fixture

The present invention relates to a workpiece fixing jig for fixing a workpiece of a sheet for laser processing, and more particularly to a workpiece fixing jig capable of supporting a workpiece below.

The metal mask used in the production of the assembled substrate was produced using a laser processing machine. The laser processing machine is a processing device that performs high-precision, high-quality micro-cutting by irradiating concentrated laser light to a workpiece of a thin metal plate having a thickness of 0.03 mm to 0.5 mm. Such a laser processing machine is described, for example, in Patent Document 1 below, and performs laser processing while holding a workpiece under an appropriate tension.

This is because when the tension acting on the workpiece is too small, the distance between the focus lens and the workpiece (the workpiece distance) varies due to slack in the workpiece, and high-precision laser processing cannot be performed. On the other hand, in the case where the tension acting on the workpiece is excessively large, deformation of the workpiece due to breakage or elongation during laser processing is caused. As shown in FIG. 9, the laser processing machine 101 described in the following Patent Document 1 applies an appropriate tension to the workpiece W after the workpiece W is attached to the holding device 103 that is integrally mounted in the processing table 102.

[Prior patent documents] [Patent Literature]

[Patent Document 1] JP-A-2004-160495

However, in recent years, there has been a demand for applying a proper tension to a workpiece in advance, and attaching the workpiece in this state to a laser processing machine and performing laser processing. In the case of coping with such a request, a workpiece fixing fixture for fixing the workpiece is additionally provided to the laser processing machine, and tension is applied to the workpiece fixed by the workpiece fixing fixture in advance, and then the workpiece is mounted together with the workpiece fixing fixture. Laser processing machine for laser processing.

However, in the case of using such a workpiece fixing jig, the following problems are caused. That is, when the workpiece fixed to the thin plate of the workpiece fixing jig is subjected to laser processing, the number of holes or openings processed in the workpiece increases, and the workpiece is slackened. In particular, as in the frame processing, when the fixed workpiece is cut by laser processing to form a large opening hole in almost the entire area, a part of the opening hole sag. When such a workpiece is slack or sagging, the distance between the focus lens and the workpiece (work distance) fluctuates, the laser processing accuracy is unstable, and there is no cut.

In order to prevent the variation of the workpiece distance caused by the slack or sagging of the workpiece, it is conceivable to support the underside of the workpiece. However, if the support mechanism that supports the entire lower surface of the workpiece is placed on the workpiece fixing jig, the support mechanism becomes large, and the weight of the workpiece fixing jig becomes large. As a result, handling of the workpiece fixing jig when it is mounted on a laser processing machine becomes troublesome. Further, even in the case where a support that supports one of the lower portions of the workpiece is provided and an actuator that moves the support in the planar direction of the workpiece is provided, it is necessary to newly add an actuator, and the workpiece fixing jig becomes expensive.

Accordingly, an object of the present invention is to provide a workpiece fixing jig capable of preventing a variation in a workpiece distance caused by slack or sagging of a workpiece in an inexpensive and simple configuration in order to solve the above problems.

The workpiece fixing jig of the present invention is fixed in a state in which tension is applied to a workpiece which is a laser processing sheet, and is subjected to laser processing after being mounted on a laser processing machine, and the workpiece fixing jig is characterized. The method includes: the first and second longitudinal frames extend in the stretching direction of the workpiece and are parallel to each other; the fixed side cross frame is in two directions from the stretching direction of the workpiece and the direction perpendicular to the plane of the workpiece. Extending and fixing one end side of the workpiece in the orthogonal direction; the movable side cross frame extends in parallel with the fixed side cross frame and stretches while holding the other end side of the workpiece; the workpiece supporting member is fixed with the fixing a lateral cross member extending in parallel and supporting a lower portion of the workpiece opposite the processing head of the laser processing machine; and a tracking movement mechanism for tracking movement of the workpiece in the stretching direction of the processing head The workpiece supporting member is moved in the stretching direction of the workpiece.

In this case, since the workpiece supporting member supports the lower portion of the portion opposite to the processing head, the number of holes or openings processed in the workpiece increases as the laser processing progresses, and the workpiece does not slack or sag. Therefore, the variation of the distance of the workpiece can be prevented, and the laser processing accuracy can be stabilized. Further, since the workpiece supporting member is moved in such a manner as to follow the movement in the stretching direction of the workpiece of the processing head, it is not necessary to support the entire lower surface of the workpiece, but to support at least the lower portion of the portion facing the processing head. Therefore, the mechanism supporting the underside of the workpiece does not become large. Further, it is not necessary to provide an actuator that moves the workpiece supporting member. Therefore, the workpiece fixing jig can be constructed inexpensively and simply.

Further, in the workpiece fixing jig of the present invention, preferably, the tracking movement mechanism has: each sliding member mounted to be slidable along the first and second vertical frames, and mounting both end portions of the workpiece supporting member And a pair of processing head tracking members extending in parallel with the fixed side cross frame, and configured to sandwich the processing head in a stretching direction of the workpiece, and the sliding members are slid by the processing head abutting .

In this case, when the machining head moves in the drawing direction of the workpiece, the machining head abuts against the machining head tracking member, and each of the sliding members slides along the first and second vertical frames. Thereby, the workpiece supporting members attached to the respective sliding members at both end portions are moved in the stretching direction of the workpiece so as to track the movement of the processing head. In this way, since the workpiece supporting member is moved by the abutment of the machining head and the machining head tracking member, it is not necessary to provide a coupling member between the machining head (laser processing machine) and the workpiece support member, and the composition can be more simply constructed. Workpiece fixing fixture.

Further, in the workpiece fixing jig of the present invention, preferably, the workpiece supporting member supports a lower portion of the workpiece to have a circular cross section; both ends of the workpiece supporting member are rotatably supported by the workpiece supporting member. A support mechanism is rotated and attached to each of the sliding members.

In this case, since the workpiece supporting member is attached to each of the sliding members via the rotation supporting mechanism when the sliding members are moved in the drawing direction of the workpiece, the surface of the workpiece supporting member is rotated by a substantially linear contact with the lower surface of the workpiece. Track the movement of the machining head. Therefore, the contact resistance between the workpiece supporting member and the workpiece can be reduced, and the workpiece supporting member does not hardly pull the underside of the workpiece, and the scratch generated under the workpiece can be almost eliminated. Therefore, the quality of the workpiece to be produced can be prevented from being lowered, and the grinding of the scratch can be greatly reduced. Time can increase the productivity of the workpiece.

Further, in the workpiece fixing jig of the present invention, it is preferable that the sliding member is provided with a biasing member that biases the workpiece supporting member toward the lower surface of the workpiece.

In this case, since the biasing member always biases the workpiece supporting member toward the lower surface of the workpiece, it is possible to maintain a state in which the vicinity of the lower surface of the workpiece supported by the workpiece supporting member is always stretched. As a result, as the laser processing progresses, the number of holes or openings processed in the workpiece increases, and the focus of the laser is hardly shifted, so that the laser processing accuracy becomes stable.

Further, in the workpiece fixing jig of the present invention, the workpiece supporting members are provided in a pair so as to be parallel to each other, and are arranged such that the laser light irradiated from the processing head is fixed by a fixed amount in the stretching direction of the workpiece.

In this case, since the pair of workpiece supporting members are disposed in parallel with each other, it is easy to support the lower surface of the portion opposite to the processing head. Further, since the workpiece supporting member is disposed away from the laser light, it is possible to prevent the melt generated by the laser processing from falling into the space formed between the pair of workpiece supporting members and adhering to the workpiece supporting member.

According to the present invention, there is provided a workpiece fixing jig capable of preventing a variation in a workpiece distance caused by slack or sagging of a workpiece with an inexpensive and simple configuration.

1‧‧ ‧ laser processing machine

10, 10A‧‧‧ workpiece fixture

11‧‧‧1st vertical frame

12‧‧‧2nd vertical frame

13‧‧‧1st cross frame

14‧‧‧2nd cross frame

15‧‧‧Fixed side cross frame

16‧‧‧ movable side cross frame

20‧‧‧ screw mechanism

30‧‧‧Processing head

32‧‧‧Focus lens

40‧‧‧Workpiece support members

41‧‧‧Sliding members

42‧‧‧Processing head tracking component

50‧‧‧Workpiece support members

60‧‧‧Sliding members

63‧‧‧ coil spring

70‧‧‧Rotary support mechanism

71‧‧‧ shaft tube

72‧‧‧Flanged bearings

73‧‧‧ shaft tube

74‧‧‧Bolts with hexagonal holes

75‧‧‧ Washer

W‧‧‧Workpiece

Wa‧‧‧ one end side

Wb‧‧‧ the other end side

WU‧‧‧ below

Fig. 1 is a plan view showing a workpiece fixing jig of the first embodiment.

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1.

Figure 3 is a partial cross-sectional view of a portion of a laser processing machine.

Fig. 4 is a view when the workpiece shown in Fig. 3 is viewed from the lower side.

Fig. 5 is a plan view showing the workpiece fixing jig of the second embodiment.

Fig. 6 is a partial cross-sectional view showing the workpiece supporting member and the rotation supporting mechanism shown in Fig. 5.

Fig. 7 is an enlarged view of a portion B shown in Fig. 5.

Fig. 8 is a cross-sectional view taken along line C-C of Fig. 5.

Fig. 9 is a view showing a conventional laser processing machine in a mode.

The embodiment of the workpiece fixing jig of the present invention will be described below with reference to the drawings. Fig. 1 is a plan view showing a workpiece fixing jig 10 according to the first embodiment, and Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1. The workpiece fixing jig 10 is fixed by a state in which tension is applied by stretching the workpiece W of the laser processing sheet. The workpiece fixing jig 10 is attached to the laser processing machine 1 after being conveyed to the laser processing machine 1 (see FIG. 3) in a state where the workpiece W is fixed.

The workpiece W is a stainless steel plate for shielding when solder is applied to a substrate of an electronic component, and is a rectangular thin plate having a thickness of 0.03 mm to 0.5 mm. The length of the longitudinal direction of the workpiece W (the upper and lower directions in the first drawing) is about 600 mm, and the length in the direction orthogonal to the longitudinal direction of the workpiece W (the horizontal direction in the first drawing) is about 480 mm. The workpiece W is irradiated with laser light from the laser processing machine 1 to form a through hole.

The workpiece fixing jig 10 is a frame having a rectangular outer shape as shown in Figs. 1 and 2, and has a stretching direction in the workpiece W (hereinafter, appropriate The first vertical frame 11 and the second vertical frame 12 extending in the "longitudinal direction" are orthogonal to the direction perpendicular to the direction in which the workpiece W is stretched and the direction perpendicular to the plane of the workpiece W (hereinafter, The first cross frame 13 and the second cross frame 14 extended as appropriate are referred to as "horizontal". Further, in Fig. 1, the drawing direction (longitudinal direction) of the workpiece W is indicated by an arrow. Further, the workpiece fixing jig 10 has a fixed side cross frame 15 extending in the lateral direction in the vicinity of the first cross frame 13, and a movable side cross frame 16 extending in the lateral direction in the vicinity of the second cross frame 14.

The first and second vertical frames 11 and 12 are parallel to each other, and both end portions are coupled to the first and second transverse frames 13 and 14 via bolts. The length of the first and second longitudinal frames 11 and 12 in the longitudinal direction is about 660 mm. The first and second vertical frames 11 and 12 are formed with guide rails 11a and 12a for sliding the slide member 41 and the movable side cross frame 16 which will be described later in the longitudinal direction. The first and second transverse frames 13, 14 are parallel to each other, and the length in the longitudinal direction is about 500 mm.

The fixed-side cross frame 15 is a clamp plate that holds one end side Wa of the workpiece W, and its position is fixed. The movable side cross frame 16 holds the clamping plate of the other end side Wb of the workpiece W, and has guides 16a at both ends. The guide 16a is attached so as to be slidable along the guide rails 11a, 12a of the first and second vertical frames 11, 12. In this manner, the movable side cross frame 16 is slidable in the longitudinal direction by the guide member 16a sliding along the guide rails 11a, 12a. Further, the movable side cross frame 16 is not detached from the lower end of the first figure of the first and second vertical frames 11 and 12 by the second cross frame 14.

Here, in the workpiece fixing jig 10, the screw mechanism 20 disposed at the symmetrical position in the left-right direction of FIG. 1 is used to apply an appropriate tension to the workpiece W. This is to prevent the workpiece W from being slackened, or broken or elongated during laser processing. Each screw mechanism 20 is threaded through the second cross frame 14 and screwed to the movable side The screw portion 21 of the cross frame 16 and the rotating portion 22 that rotates the screw portion 21 are formed. Hereinafter, a step of imparting an appropriate tension to the workpiece will be described.

First, as shown in Fig. 1, the fixed side cross frame 15 is held by the one end side Wa of the workpiece W, and the other end side Wb of the workpiece W is held by the movable side cross frame 16, whereby the workpiece W is positioned and fixed. . Next, after the screw mechanism 20 is attached to the workpiece fixing jig 10, the rotating portion 22 is rotated, and the movable side cross frame 16 is pulled to the lower side of the first drawing. At this time, the amount of rotation of the rotating portion 22 is adjusted to impart an appropriate tension to the workpiece W.

Then, the movable side cross frame 16 and the first and second vertical frames 11 and 12 are coupled by bolts 17 in a state where an appropriate tension is applied to the workpiece W. Then, the screw mechanism 20 is removed from the workpiece fixing jig 10. In this manner, even if the workpiece W to be stretched is intended to return to the original state, and the movable side cross frame 16 is intended to move to the upper side of the first figure, the movement is restricted by the bolts 17. In other words, the workpiece fixing jig 10 can be moved to the laser processing machine 1 while maintaining a proper tension to the workpiece W.

Next, a schematic configuration of the laser processing machine 1 for performing laser processing on the workpiece W will be described. Fig. 3 is a partial cross-sectional view showing a portion of the laser processing machine 1. Moreover, Fig. 4 is a view when the workpiece W shown in Fig. 3 is viewed from the lower WU side. As described above, the workpiece fixing jig 10 for fixing the workpiece W is attached to a holding device (not shown) of the laser processing machine 1 and performs laser processing on the workpiece W. The laser processing machine 1 has a processing head 30 as shown in FIG.

The processing head 30 is a device that irradiates laser light, and has a head main body 31 that introduces laser light from above, a focus lens 32 that is a convex lens disposed in the head main body 31, and a conical cylindrical nozzle that is disposed coaxially with the focus lens 32. 33. In the processing head 30, the workpiece W can be cut while moving in the planar direction of the workpiece W (longitudinal direction and lateral direction) by a displacement mechanism portion or the like (such as an overhead frame (not shown). Further, in FIGS. 3 and 4, the drawing direction of the workpiece W is indicated by an arrow.

In the workpiece fixing jig 10 of the present embodiment, by supporting the lower surface WU of the workpiece W, the slack or sagging of the workpiece W is prevented, and the distance between the focus lens 32 and the workpiece W, that is, the workpiece distance is prevented from changing. Hereinafter, the configuration in which the workpiece fixing jig 10 supports the lower surface WU of the workpiece W will be described in detail.

The workpiece fixing jig 10 includes two workpiece supporting members 40 extending in the lateral direction, and sliding members 41 that connect (fix) both end portions of the workpiece supporting member 40, as shown in FIGS. 1 to 4, And a pair of processing head tracking members 42 configured to clamp the processing head 30 extending in the lateral direction in the longitudinal direction.

Each of the workpiece supporting members 40 is a lower surface (back surface) WU for supporting at least a portion of the workpiece W opposed to the processing head 30 as shown in FIG. These workpiece supporting members 40 are disposed on the lower side of the workpiece W on the WU side. As shown in Fig. 1, in order to support the lateral whole of the workpiece W, the length in the lateral direction of the workpiece W is longer. The pair of workpiece supporting members 40 are arranged in parallel so as to be spaced apart from each other in the longitudinal direction by the laser beam irradiated from the processing head 30 so as to be spaced apart from the tip end of the nozzle 33 of the processing head 30. This is to prevent the melt generated by the laser processing from falling into the space formed between the pair of workpiece supporting members 40 and adhering to the workpiece supporting member 40. Further, two workpiece supporting members 40 are provided to more easily support the lower surface WU of the workpiece W opposed to the processing head 30 than one. Further, as shown in FIG. 3, the workpiece supporting member 40 is formed in a round bar shape, but the shape of the workpiece supporting member 40 may be appropriately changed, or may be a quadrangular cross section or a flat upper side. Angled. Further, the workpiece supporting member 40 may have a plate shape.

Each of the sliding members 41 is slidable in the longitudinal direction along the first and second vertical frames 11 and 12. Each of the sliding members 41 has a connecting body 41a that connects the both end portions of the respective workpiece supporting members 40 and guide rails 11a and 12a that are attached to the first and second vertical frames 11 and 12, as shown in Figs. 3 and 4 . Mobile body 41b. The connecting body 41a is formed into a substantially rectangular parallelepiped shape, and the processing head tracking member 42 is fixed to the upper surface. The moving body 41b is linearly movable along the guide rails 11a and 12a by rolling of a ball (not shown). That is, these moving bodies 41b form a linear guide mechanism with the guide rails 11a and 12a.

Each of the machining head tracking members 42 is brought into contact with the machining head 30 to slide the respective sliding members 41. The pair of processing head tracking members 42 are bridged between the respective sliding members 41 as shown in Fig. 1 . Further, as shown in Fig. 3, a small gap X1 is formed between the machining head 30 and each of the machining head tracking members 42 in the longitudinal direction (stretching direction). Thereby, the processing head 30 does not come into contact with each of the processing head tracking members 42 when moving in the lateral direction. However, when the machining head 30 moves in the longitudinal direction, it abuts against each of the machining head tracking members 42 regardless of the lateral position. These processing head tracking members 42 extend from both ends in the lateral direction to the lower side, and the lower ends are fixed to the upper surfaces of the coupling bodies 41a of the respective sliding members 41.

As shown in FIG. 3, the pair of machining head tracking members 42 are disposed at positions symmetrical with respect to the center line O1 of the machining head 30 in the longitudinal direction. The longitudinal gap X1 between the machining head tracking member 42 and the machining head 30 is as small as about 1 mm, and the machining accuracy of the abutment is not affected by the abutment portion of the machining head 30 and each machining head tracking member 42. Install a cushioning member that reduces impact (not shown). Further, the processing head tracking member 42 is in the shape of a round bar, and the shape of the processing head tracking member 42 is suitable. Local changes, or the cross section is a quadrangle. Further, the processing head tracking member 42 may be in a plate shape. In the present embodiment, each of the machining head tracking members 42 and each of the sliding members 41 corresponds to the tracking movement mechanism of the present invention.

Next, the operation and effect of the workpiece fixing jig 10 of the first embodiment will be described. The workpiece fixing jig 10 is attached to the laser processing machine 1 in a state in which an appropriate tension is applied to the workpiece W, and is subjected to laser processing. At this time, even if the processing head 30 is moved in the lateral direction (the left-right direction of FIG. 1), since the length of the workpiece supporting member 40 is longer than the lateral length of the workpiece W, the workpiece supporting member 40 can always be supported and processed by the processing head 30. The lower part of the WU is opposite (see Figure 4). Further, when the machining head 30 moves in the vertical direction (the downward direction in the first drawing), the machining head 30 comes into contact with the machining head tracking member 42, and the sliding members 41 move along the first and second vertical frames 11 and 12. Thereby, each of the workpiece supporting members 40 is moved in the longitudinal direction in such a manner as to track the movement of the processing head 30, and the lower surface WU which is opposed to the processing head 30 can always be supported.

In this manner, the lower portion of the WU opposite the processing head 30 can be supported regardless of the movement of the processing head 30. As the laser processing progresses, the number of holes or openings processed in the workpiece W increases, and the workpiece W does not slack or sag. Therefore, the variation of the distance of the workpiece can be prevented, and the laser processing accuracy can be stabilized. Further, if the jig 10 is fixed in accordance with the workpiece, since the workpiece supporting member 40 moves in such a manner as to track the longitudinal movement of the processing head 30, it is not necessary to support the entire lower WU of the workpiece W, and the mechanism for supporting the lower WU of the workpiece W does not Become bigger. Further, it is not necessary to provide an actuator that moves the workpiece support member 40. Therefore, the workpiece fixing jig 10 can be configured inexpensively and simply.

Moreover, according to the workpiece fixing jig 10 of the first embodiment, As described above, the workpiece supporting member 40 is moved by the contact of the machining head 30 with the machining head tracking member 42. Therefore, it is not necessary to provide the joint member between the machining head 30 (the laser processing machine 1) and the workpiece support member 40, and the workpiece fixture jig 10 can be configured more simply.

Further, according to the workpiece fixing jig 10 of the first embodiment, since the pair of workpiece supporting members 40 are provided in parallel with each other as shown in Fig. 4, it is easy to support the lower portion of the portion opposite to the processing head 30. . Further, since the workpiece supporting member 40 is disposed away from the irradiated laser light, the melt which is generated away from the laser processing falls into the space formed between the pair of workpiece supporting members 40 and adheres to the workpiece supporting member 40.

Next, the workpiece fixing jig 10A of the second embodiment will be described. In the workpiece fixing jig 10 of the first embodiment described above, both end portions of the workpiece supporting members 40 are fixed to the respective sliding members 41. Therefore, when each of the sliding member 41 and the workpiece supporting member 40 moves in the longitudinal direction (the lower direction in the first drawing), the contact resistance between each of the workpiece supporting members 40 and the lower surface of the workpiece W becomes larger, and each of the workpiece supporting members 40 is entangled. The burr of the WU below the workpiece W is hard-drawn on one side, and there may be many scratches on the WU below the workpiece W. When a scratch is generated in this manner, not only the quality of the workpiece to be produced is lowered, but also the grinding is required to cause the scratch to become an inconspicuous work. Further, in the case where a large number of scratches are generated, the polishing processing time is required to be large, which causes a decrease in the production efficiency of the workpiece. Therefore, the workpiece fixing jig 10A of the second embodiment is configured as follows in order to cope with the above problems.

Fig. 5 is a plan view showing the workpiece fixing jig 10A of the second embodiment. The workpiece fixing jig 10A and the second embodiment shown in Fig. 5 The workpiece fixing fixture 10 of the first embodiment shown in Fig. 1 has first and second vertical frames 11 and 12, first and second transverse frames 13, 14 and a fixed side cross frame 15 and a movable side cross frame 16. The processing head tracking member 42 has the same configuration, and the same reference numerals will be given thereto, and the description thereof will be omitted. On the other hand, in the workpiece fixing jig 10A of the second embodiment, since the configuration of the workpiece supporting member 50 and the sliding member 60 is different from that of the first embodiment, the rotation supporting mechanism 70 is newly provided, so that the workpiece supporting is described. The member 50, the sliding member 60, and the rotation support mechanism 70.

Fig. 6 is a partial cross-sectional view showing the workpiece supporting member 50 and the rotation support mechanism 70 shown in Fig. 5. The workpiece supporting member 50 is a hollow cylindrical tube extending in the lateral direction (the left-right direction of FIG. 5) as shown in FIGS. 5 and 6, and has a circular hole-shaped through hole 50a. Further, the outer shape of the workpiece supporting member 50 is circular in shape and has an outer diameter of 10 mm. The workpiece supporting member 50 is supported in a state of substantially line contact (not surface contact) with respect to the lower surface WU of the workpiece W regardless of the slack of the lower surface of the workpiece W, and the both end portions 50b, 50c are respectively mounted via the rotation support mechanism 70. Sliding member 60.

The rotation support mechanism 70 supports the workpiece support member 50 to be rotatable, as shown in Fig. 6, and is configured to include a shaft tube 71, a bearing 72 having a flange, a collar tube 73, a bolt 74 having a hexagonal hole, and a washer 75. . Further, the bearing 72 having the flange, the collar tube 73, the bolt 74 having the hexagonal hole, and the washer 75 are provided in each of two.

The shaft tube 71 is a hollow cylindrical tube extending in the lateral direction longer than the workpiece supporting member 50, and has a through hole 71a having a circular hole shape. The shaft tube 71 penetrates the through hole 50a of the workpiece supporting member 50 coaxially. Both end portions 71b and 71c protrude from both end portions 50b and 50c of the workpiece supporting member 50. Moreover, the workpiece support Both end portions 50b, 50c of the member 50 are assembled to be rotatable by the bearing 72 having a flange.

Each of the flanged bearings 72 is assembled to both ends of the through hole 50a of the workpiece supporting member 50, and is hung on the side surfaces of both ends of the workpiece supporting member 50 by flanges. Further, since the configuration of the one end portion 50b side of the workpiece supporting member 50 is the same as the configuration of the other end portion 50c side of the workpiece supporting member 50, only the configuration of the one end portion 50b side of the workpiece supporting member 50 will be described below.

The collar tube 73 is for preventing the bearing 72 having the flange from coming off the through hole 50a. The collar tube 73 is a hollow cylindrical tube having a circular hole-shaped through hole 73a and assembled to the outer circumference of one end portion 71b of the shaft tube 71. The bolt 74 having a hexagonal hole is for preventing the collar tube 73 from coming off the outer circumference of one end portion 71b of the shaft tube 71. The bolt 74 having a hexagonal hole is attached to the through hole 73a of the collar tube 73 using a washer 75.

Next, a state in which one end portion 50b of the workpiece supporting member 50 is attached to the sliding member 60 via the rotation support mechanism 70 will be described with reference to FIG. Fig. 7 is an enlarged view of a portion B shown in Fig. 5. As shown in Fig. 7, the collar pipe 73 penetrates the through hole 60c formed in the coupling body 60a of the sliding member 60. In this state, the pressure plate 61 is attached to the coupling body 60a of the sliding member 60 from above by the bolt 62. By attaching the collar tube 73 to the sliding member 60 in this manner, the workpiece supporting member 50 can rotate the sliding member 60 by the rotation support mechanism 70.

Next, a state in which the workpiece supporting member 50 is biased toward the lower surface WU of the workpiece W will be described with reference to FIG. Fig. 8 is a cross-sectional view taken along line C-C of Fig. 5. As shown in Figure 8, extending in the vertical direction The two attachment holes 60d are formed in the coupling body 60a of the slide member 60, and the coil spring 63 is disposed in each attachment hole 60d. Further, the coil spring 63 is slightly compressed at the bottom portion of the collar tube 73 and the attachment hole 60d, and the collar tube 73 (one end portion 71b of the shaft tube 71) is biased upward. Thereby, the workpiece supporting member 50 is slightly biased toward the lower surface WU of the workpiece W. In the present embodiment, the coil spring 63 corresponds to the "biasing member" of the present invention, but the biasing member may be appropriately changed, and may be, for example, a circular spring. In addition, since the other structure of the sliding member 60 is the same as that of the sliding member 41 of the first embodiment, the reference numeral 60 is attached, and the description thereof is omitted.

The effects of the second embodiment will be described. According to the workpiece fixing jig 10A of the second embodiment, as in the workpiece fixing jig 10 of the first embodiment, when the machining head 30 is moved in the vertical direction (the lower direction in the fifth drawing) during the laser processing, the machining is performed. The head 30 abuts on the machining head tracking member 42, and each of the sliding members 60 moves along the first and second vertical frames 11 and 12. Thereby, each of the workpiece supporting members 40 is longitudinally moved to track the movement of the processing head 30, and can support the lower surface WU of the portion opposite to the processing head 30. As a result, slack or sagging in the workpiece W can be prevented, and the laser processing accuracy can be stabilized.

Further, according to the workpiece fixing jig 10A of the second embodiment, when the sliding members 60 are longitudinally moved, the respective workpiece supporting members 50 are attached to the respective sliding members 60 via the rotation supporting mechanism 70, and the both end portions 50b and 50c are attached to the respective sliding members 60. Therefore, the movement of the processing head 30 is tracked while rotating the lower surface of the workpiece W in a substantially line contact state. Therefore, compared with the first embodiment, the contact resistance between the workpiece supporting member 50 and the lower surface WU of the workpiece W can be reduced, and the workpiece supporting member 50 does not hardly pull the burr of the lower surface of the workpiece W, but can almost eliminate the work. The scratch caused by the WU below the piece W. Therefore, the quality of the workpiece W to be produced can be prevented from being lowered, and the time required for the polishing process for the scratch can be greatly reduced, and the production efficiency of the workpiece W can be improved. Further, since the contact resistance between the workpiece supporting member 50 and the lower surface WU of the workpiece W can be reduced, the longitudinal movement of each of the sliding members 60, the respective machining head tracking members 42, and the machining head 30 can be made smooth.

Further, according to the workpiece fixing jig 10A of the second embodiment, as shown in Fig. 8, since the coil spring 63 always constantly biases the workpiece supporting member 50 toward the lower surface WU of the workpiece W, the workpiece supporting member 50 can be maintained. The vicinity of the WU below the supported workpiece W is always in a stretched state. As a result, as the number of holes or openings processed in the workpiece W increases as the laser processing progresses, the focus of the laser light is hardly shifted, and the laser processing accuracy can be stabilized.

Although the embodiments of the workpiece fixing jig of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention.

For example, in the first embodiment and the second embodiment, the processing head 30 and the processing head tracking member 42 are directly in contact with each other, and the workpiece supporting members 40 and 50 can follow the movement in the longitudinal direction of the processing head 30. However, the movement of the workpiece support member 40 in the longitudinal direction of the processing head 30 can be tracked by connecting the workpiece supporting member 40 to a displacement mechanism portion or the like that moves the processing head 30 or the like.

In the first embodiment and the second embodiment, the lower surface WU of the workpiece W is supported by the two workpiece supporting members 40 and 50. However, the workpiece supporting members 40 and 50 are not limited to two, and can be appropriately changed. Therefore, if there are three or more workpiece supporting members 40, 50, the lower surface of the workpiece W can be more stably supported. WU.

Further, in the first embodiment, the workpiece W is appropriately tensioned by the screw mechanism 20. However, the tension is applied to the workpiece W, and the workpiece W can be appropriately changed. For example, an actuator such as a pneumatic cylinder can be used to appropriately apply the workpiece W. The tension.

Further, in the second embodiment, the workpiece supporting member 50 having an outer diameter of 10 mm is used, but the outer diameter of the workpiece supporting member can be appropriately changed. Here, a case where the workpiece supporting member 50 having an outer diameter of 10 mm is used and a case where a workpiece supporting member having an outer diameter of 8 mm is used, for example, is compared and explained. The workpiece supporting member 50 having an outer diameter of 10 mm has an advantage that the straightness is larger than the workpiece supporting member having an outer diameter of 8 mm, that is, the deviation from the axial center is small. Further, in the case of using the workpiece supporting member 50 having an outer diameter of 10 mm, compared with the case of using the workpiece supporting member having an outer diameter of 8 mm, the curvature of the portion of the lower portion WU supporting the workpiece W is small, and the pair is slightly slackened or The contact area of the lower portion of the workpiece W of the drooping workpiece W becomes large, and the lower surface WU of the workpiece W can be more stably supported. On the other hand, in the case of using the workpiece supporting member having an outer diameter of 8 mm, the weight of the workpiece supporting member itself is lighter than in the case of using the workpiece supporting member 50 having an outer diameter of 10 mm, and the respective sliding members 60, The movement of the machining head tracking member 42 and the machining head 30 is more rounded.

15‧‧‧Fixed side cross frame

Wa‧‧‧ one end side

10‧‧‧Working fixture

W‧‧‧Workpiece

11‧‧‧1st vertical frame

12‧‧‧2nd vertical frame

13‧‧‧1st cross frame

11a, 12a‧‧‧ rails

40‧‧‧Workpiece support members

41‧‧‧Sliding members

42‧‧‧Processing head tracking component

41a‧‧‧Connected body

41b‧‧‧Mobile

16‧‧‧ movable side cross frame

16a‧‧‧Guide

17‧‧‧ bolt

14‧‧‧2nd cross frame

20‧‧‧ screw mechanism

21‧‧‧ Screw Department

22‧‧‧Rotation

Wb‧‧‧ the other end side

Claims (5)

A workpiece fixing jig for fixing a workpiece in a state of imparting tension by stretching a workpiece of a sheet for laser processing, and performing laser processing after being mounted on a laser processing machine, characterized in that: 1 longitudinal frame and second longitudinal frame extending in the stretching direction of the workpiece and parallel to each other; the fixed side transverse frame is orthogonal to the direction perpendicular to the stretching direction of the workpiece and the direction perpendicular to the plane of the workpiece a direction extending and fixing one end side of the workpiece; a movable side cross frame extending in parallel with the fixed side cross frame and being stretched while holding the other end side of the workpiece; the workpiece supporting member is transverse to the fixed side a frame extending in parallel and supporting a lower portion of the workpiece opposite the processing head of the laser processing machine; and a tracking movement mechanism for tracking movement of the workpiece in the stretching direction of the processing head The workpiece support member moves in the stretching direction of the workpiece. The workpiece fixing jig according to claim 1, wherein the tracking moving mechanism has: each sliding member installed to slide along the first vertical frame and the second vertical frame, and the workpiece supporting member is mounted And a pair of processing head tracking members extending in parallel with the fixed side cross frame, and arranged to sandwich the processing head in a stretching direction of the workpiece, and the processing head abuts The sliding member slides. The workpiece fixing fixture of claim 2, wherein the workpiece supporting member supports a lower portion of the workpiece to have a circular cross section; both ends of the workpiece supporting member rotatably support the workpiece supporting member A rotation support mechanism is attached to each of the sliding members. A workpiece fixing jig according to claim 3, wherein in the sliding member, a biasing member biasing the workpiece supporting member toward a lower surface of the workpiece is provided. The workpiece fixing jig according to any one of claims 1 to 4, wherein the workpiece supporting members are disposed in a pair to be parallel to each other, and are disposed to face the laser light irradiated from the processing head. The stretching direction of the workpiece is a fixed amount.