JPH08238582A - Laser beam machine - Google Patents

Abstract

PURPOSE: To prevent the irradiation to the point which is already subjected to processing by heads other than a head used for execution of processing again with a laser beam in superposition in the case where the processing by any head is executed again with a laser beam machine which processes a work by plural pieces of the heads utilizing the movement control of a holding frame for holding this work. CONSTITUTION: This laser beam machine has the holding frame 16 which holds the work and is subjected to movement control in accordance with movement data in both X and Y directions and plural pieces of the heads 40 for individually irradiating the work with the beams oscillated from an oscillator 100. The laser beam machine has a frame back means capable or returning the holding frame 16 to the desired position according to the movement data at the time of reexecuting the processing of the work by any among the respective heads 40 and a beam control means for stopping the irradiation with the beams from the heads exclusive of the head for reexecuting the processing only during the time from the restarting point of the processing until the returning start point of the holding frame by this frame back means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser for performing laser processing (cutting or engraving) by irradiating a laser beam on a workpiece such as cloth while controlling the movement in both X and Y directions. Regarding processing machines.

[0002]

2. Description of the Related Art Conventionally, for example, in the technique disclosed in Japanese Examined Patent Publication No. 6-33550, in an embroidery sewing machine having a plurality of sewing machine heads, a cloth held on a fabric frame for each sewing machine head. Laser heads capable of irradiating the surface of the (workpiece) with a laser beam are individually mounted. Therefore, after embroidering the cloth by each sewing machine head or before embroidering the cloth, by irradiating a laser beam from each laser head while controlling the movement of the original frame in both X and Y directions, a plurality of cloths can be sewn. Laser processing (cutting) can be performed at the same time.

[0003]

However, at the end of cutting by a plurality of laser heads or during cutting, when it is detected that the cutting by any one of the laser heads is incomplete for some reason, the laser is cut. You have to redo the cut on the head. For that purpose, it is necessary to return the original fabric frame to the re-cutting point by frame back control, and perform the cutting from there to the return start point of the original fabric frame. However, in the laser head where the cutting is properly performed, the laser beam is overlapped and irradiated to the already cut portion between the starting point of the re-cutting and the starting point of returning the original frame. In this case, if the cloth is completely cut (cut) by the laser beam, there are few problems. However, for example, when cutting only the upper one of the two-layered cloth, it is originally necessary to redo the cut. The lower cloth that is not scheduled to be cut will also be cut or burnt.

One problem to be solved by the present invention is
A laser processing machine for performing laser processing on a workpiece held by a holding frame by using a plurality of laser heads by using movement control of the holding frame based on movement data in both X and Y directions. If the laser processing is incomplete and the laser processing is performed again, the laser heads other than the laser head stop the laser beam irradiation from the start point of the laser processing start again to the return start point of the holding frame to properly perform the laser processing. This is to prevent the laser beam from being applied to the place where the irradiation has been performed. Another problem to be solved by the present invention is to release the irradiation stop of the laser beam of the laser head that was paused while the laser processing was redone when the holding frame reached its return start point. , The laser processing by these laser heads is automatically restarted.

[0005]

In order to solve the above-mentioned problems, the laser processing machine of the present invention is constructed as follows. The invention according to claim 1 holds a workpiece, and X,
A laser processing machine comprising: a holding frame whose movement is controlled based on movement data in both Y directions; and a plurality of laser heads which individually irradiate the workpiece with a laser beam oscillated from a laser oscillator. A frame back means capable of returning the holding frame to a desired position according to the movement data when the laser processing of the work piece is performed again by any one of the laser heads; Beam control means for stopping the irradiation of the laser beam from the laser head other than the laser head for re-doing the laser processing is provided only from the start point of redoing to the start point of returning the holding frame by the frame back means. A second aspect of the present invention is the laser beam machine according to the first aspect, wherein the beam control means releases the irradiation stop of the laser beam of the laser head other than the laser head that re-performs laser processing at the returning start point of the holding frame. It is equipped with a means for releasing the stop.

[0006]

According to the invention described in claim 1, when it is detected that the laser processing by any one of the plurality of laser heads is incomplete, the frame back means causes the holding frame to move. Return to the starting point for laser processing. Then, in the period from the redo start point to the return start point of the holding frame, the laser beam irradiation from the laser head other than the laser head for redoing the laser beam is stopped by the beam control means to correct the laser beam. . As a result, it is possible to avoid irradiating a laser beam on a portion of the workpiece that has been properly laser-processed. This means that when the workpiece is a stack of cloths, for example, and only some of the cloths on the upper side are cut by laser processing, from the re-starting point of laser processing, By the time the return of the holding frame is started, the situation in which the cloth on the lower side, which is not originally scheduled to be cut, is cut is eliminated. According to the second aspect of the present invention, when the holding frame reaches its return start point while the laser beam machining is being redone, the laser head which has been stopped until then (the laser beam machining was properly performed). The laser beam irradiation of the laser head) is released, and the laser processing by these laser heads is automatically restarted.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. In the following embodiments, the present invention is applied to an embroidery sewing machine having a plurality (four) of multi-needle type sewing heads and one laser head corresponding to each sewing machine head. 1 is a front view of the embroidery sewing machine, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a front view showing a part of FIG. 1 in an enlarged manner. As shown in these drawings, four sewing machine heads 20 are provided at equal intervals on the front surface of the sewing machine frame 14 located above the sewing machine table 10. Similarly, on the front surface of the sewing machine frame 14, a total of four laser heads 40 are arranged so as to correspond to the respective sewing machine heads 20.

As shown in FIGS. 1 and 2, an original frame 16 as a holding frame capable of holding a work piece (sheet-like material such as cloth) described later is provided on the upper surface of the sewing machine table 10 with predetermined movement data. Based on the (embroidery data), the movement control is provided in both the X and Y directions of FIG. As shown in FIG. 1, a hook base 30 is supported on the horizontal frame of the table leg 12 on the lower surface side of the sewing machine table 10 at a position corresponding to each sewing machine head 20. Similarly, on the front of the horizontal frame of this table leg 12,
A steel block plate 36 for receiving a laser beam at a position corresponding to each of the laser heads 40.
Are fixed respectively.

The sewing machine head 20 has a needle bar case 24 shown in FIG. 3 with respect to a front portion of a sewing machine arm 22 fixed to the sewing machine frame 14 as shown in FIGS.
Is supported slidably in the left-right direction of the sewing machine.
As is apparent from FIG. 3, six needle bars (not shown) each having a sewing needle 26 at its lower end are supported by the needle bar case 24 so as to be vertically movable. The needle bar cases 24 of each sewing machine head 20 are connected to each other by a connecting rod 28, and the needle bar cases 24 are simultaneously slid in the same direction by a predetermined drive source. It is well known that this causes one of the needle bars to be selected and only the selected needle bar to be driven up and down together with the sewing needle 26.

FIG. 4 is a side view of FIG. 2 seen from the direction of arrow AA, and FIG. 5 is a side view showing a part of FIG. 4 in an enlarged manner.
6 is a sectional view taken along line BB of FIG. As shown in these drawings, the laser head 40 includes a support body 42 that is vertically movable with respect to a lower portion of the front surface of the bracket 18.
A lens rack 44 attached to the support body 42, a guide cylinder 46 also connected to the lower portion of the support body 42, and a protective cylinder 50 attached to the outer periphery of the guide cylinder 46 so as to be able to move up and down. The bracket 18 is shown in FIG.
As shown by 6 to 6, it is fixed to the front surface of the sewing machine frame 14 by bolting.

FIG. 7 is an enlarged sectional view taken along line CC of FIG. 3, and FIG. 8 is a sectional view taken along line DD of FIG. As is apparent from these drawings, the support body 42 is supported by the bracket 18 so as to move up and down by being guided by rails 43 fixed to the left and right sides of the front surface of the bracket 18. The support body 42 is driven up and down by a lifting mechanism 56. The structure of the elevating mechanism 56 will be described mainly with reference to FIGS. First, a motor 58 as a drive source is mounted on the side wall of the bracket 18, and a drive gear 59 is fixed to its main shaft. The drive gear 59 meshes with an intermediate gear 60 that is rotatably supported by the front wall of the bracket 18, and the intermediate gear 60 is a rack member 62 fixed to the back side of the support body 42. Meshes with the rack teeth of. Therefore, when the motor 58 is rotationally driven in both forward and reverse directions, the support body 42 is moved up and down through the engagement of the drive gear 59, the intermediate gear 60 and the rack member 62. As a result, the height of the laser head 40 is adjusted, and as a result, the focus position of the lens 47 described below is adjusted.

The lens rack 44 has a cylindrical shape, and is rotatably supported on the upper and lower horizontal portions 42a and 42b of the support body 42 by a shaft 45 penetrating the center of the lens rack 44. Further, in this lens rack 44, holes 44A, 44B, which penetrate vertically, are formed at three positions on the circumference centered on the shaft 45, as shown in FIGS.
44C are formed respectively. Lenses 47 having different focal lengths are incorporated in the holes 44A, 44B and 44C, respectively. By the way, these lenses 47 have the above-mentioned holes 44A, 44B, 44.
The focal lengths are set from “large” to “small” in the order of C.

As is apparent from FIG. 6, through holes 48 and 49 which are aligned with one of the holes 44A, 44B and 44C of the lens rack 44 are formed in the upper and lower horizontal portions 42a and 42b of the support body 42, respectively. Has been done. The lens rack 44 is manually rotated around the axis of the shaft 45 to align any one of the holes 44A, 44B, and 44C with the through holes 48 and 49, thereby allowing the lens 47 to be used at that time. Can be selected. FIG. 9 is an enlarged cross-sectional view showing a part of FIG. As shown in FIGS. 9 and 6, lock pins 54 urged toward the lens rack 44 by springs 55 are provided at two upper and lower positions of the support body 42. Therefore, the lens rack 44 is rotated to operate the holes 44A, 44B, 44.
When any one of C is aligned with the through holes 48, 49 of the support 42, the lock pin 54 engages with the recess 44a formed on the outer periphery of the lens rack 44 as shown in FIG.
The rotation of the lens rack 44 is locked (positioned).

As shown in FIG. 6, the guide cylinder 46 is provided on the lower surface of the lower horizontal portion 42b of the support 42,
It is fixed in a state of being aligned with the through hole 49 of the horizontal portion 42b. The protective cylinder 50, which is attached to the outer periphery of the guide cylinder 46 so as to be movable up and down, is formed of a transparent synthetic resin material or the like, and an annular groove 53 is formed on the outer periphery of the upper end portion thereof. The annular groove 53 is shown in FIG.
5, a fork-shaped arm 74 is engaged, and this arm 74 is connected to a rod 71 of an air cylinder 70 mounted downward on the bracket 18 via a cylinder bracket 72. Therefore, by driving the air cylinder 70, the protection cylinder 50 is moved to the position shown in FIG.
It moves along the outer circumference of the guide cylinder 46 between the ascending position (retracted position) shown by the phantom line and the lowered position (use position) shown by the solid line.

An air hole 52 is formed in the side wall of the protective cylinder 50 near the lower end as shown in FIG.
In the air hole 52, as shown in FIGS.
6, one end of which is connected, and the other end of the air pipe 76 is connected to an air supply source (not shown) so that air can be blown into the protective cylinder 50 from the air hole 52. Also, as shown in FIGS.
A pipe 66 extending from the side of the sewing machine frame 14 toward the front of the sewing machine is arranged at the rear portion of the. A suction nozzle 64 that is brought close to the lower end of the laser head 40 (the lower end of the protective cylinder 50) is connected to the tip of the pipe 66, and the rear end of the pipe 66 is connected to the sewing machine frame 14
It is connected to a duct 68 that is piped inside. The duct 68 is connected to a suction blower (not shown) so that air around the lower end of the laser head 40 can be sucked.

Further, as shown in FIGS. 3 and 4, a hole 11 opened vertically is formed in the sewing machine table 10 at a position corresponding to the laser head 40. The hole 11 is attached to the upper surface of the table 10. The beam plate 34 is closed. And on this beam plate 34,
As shown in FIGS. 4 to 6, a beam hole 35 for passing a laser beam is formed. That is, laser head 4
The laser beam emitted from 0 is the beam plate 34.
The beam passes through the beam hole 35 without being reflected by and is received by the block plate 36 on the lower surface side of the sewing machine table 10.

A beam guide 80 mounted on the front surface of the bracket 18 is disposed above the laser head 40. As shown in FIGS. 5 and 6, the beam guide 80 includes a mirror support block 82 and two guide tubes 86 and 87 connected to the mirror support block 82. The mirror support block 82 is fixed to the front surface of the bracket 18 by bolting. Both guide tubes 86, 87
Are connected to the mirror support block 82 so as to be orthogonal to each other in the vertical and longitudinal directions of the sewing machine. That is, one guide tube 86 is the mirror support block 82.
Downward from the laser head 4
The guide tube 87 extends from the mirror support block 82 in the rear direction of the sewing machine while facing the through hole 48 of the upper horizontal portion 42a of the support body 42 of 0.

FIG. 10 is a sectional view showing a part of the beam guide body 80 in an enlarged manner, and FIG. 11 is a structural view of FIG. 10 seen from the direction of arrow E. As is clear from these drawings, both the guide tubes 8 are provided with respect to the mirror support block 82.
Communication holes 84 in which 6, 87 are individually inserted from two directions
Are orthogonal to each other inside the mirror support block 82. The mirror support block 82 is opened at a position orthogonal to the communication hole 84, and a holding plate 89 having a total reflection mirror 88 is attached to the inside thereof.

In FIG. 11, the holding plate 89 is fastened to the mirror support block 82 by one fixing bolt 90 at the center of the upper row and two fixing bolts 90 at the left and right of the lower row (three in total). On the other hand, in FIG. 11, the tip ends of the two adjustment bolts 91 on the left and right of the upper row and the central adjustment bolt 91 (a total of three) are in contact with the surface of the mirror support block 82. The inclination of the holding plate 89, that is, the mirror 88 can be adjusted by the screwing amount of the adjusting bolts 91, and the holding plate 89 is fixed to the mirror support block 82 by tightening the fixing bolt 90 after this adjustment.

On the front side of the mirror support block 82, a protective cover 92 is attached so as to cover the holding plate 89 of the mirror 88. This protective cover 92 is
This is for protecting the worker from the laser beam should the holding plate 89 be detached from the mirror support block 82. The protective cover 92 has a through hole 9 into which a tool for turning the fixing bolt 90 and the adjusting bolt 91 is inserted.
Equipped with 3.

As shown in FIGS. 2 and 4, at the rear position of the sewing machine frame 14, individual laser oscillators 100 corresponding to the respective laser heads 40 are arranged in the front-back direction of the sewing machine. These laser oscillators 100 are of a type using a gas laser (CO ₂ laser) capable of continuously irradiating a laser beam. In front of each laser oscillator 100, a conduit 10 for guiding a laser beam emitted from an individual irradiation nozzle (not shown) to a guide tube 87 of the beam guide body 80.
6 are arranged respectively. Each of the beam guides 8
The laser beam entering 0 strikes the mirror 88, is reflected downward, is guided to one of the holes 44A, 44B, 44C of the lens rack 44 in the laser head 40, and is focused by the lens 47 in the hole. The processed product will be laser processed (cut, etc.).

As is apparent from FIG. 4, the laser oscillator 100 is horizontally supported by a support frame 102 fixed to the sewing machine frame 14 and a support frame 103 fixed to the rear end of the sewing machine table 10. It is mounted and fixed on the upper surface of the support plate 104. The laser oscillator 10 is provided on the lower surface of the support plate 104.
0 controller 107 is mounted, and as shown in FIG. 1, a chiller box 108 for cooling the laser oscillator 100 is arranged below the sewing machine table 10.

As shown in FIG. 4, in each of the conduits 106, a blocking device 110 capable of blocking the laser beam is provided at the end portion on the side close to the laser oscillator 100. The blocking device 110 is provided as a safety measure in the case where a laser beam is irradiated due to a malfunction of the drive system of the laser oscillator 100, or as a means for individually blocking the irradiation of the laser beam from each laser head 40. is there.

FIG. 12 is an enlarged sectional view showing the breaking device 110. The shutoff device 110 will be described with reference to this drawing. Supports 112 are fixed to both outsides of the opening formed in the conduit 106, and a steel block member 116 is fixed to the inside of the conduit 106. A latching solenoid 114, which is an actuator of the breaking device 110, is fixed between the two supports 112 above the opening with the rod 115 thereof directed downward. The block member 116 has a vertical hole 117 penetrating up and down and a lateral hole 11 crossing the hole 117 penetrating forward and backward.
And 8 are formed. This lateral hole 118 is used for the conduit 10
The laser beam passes through the inside of 6 and allows passage of the laser beam.

An opening / closing element 119 connected to the rod 115 of the solenoid 114 is vertically movably positioned in the vertical hole 117 of the block member 116. Therefore, as shown in FIG.
In the state where 15 is retracted, the opening / closing element 119 is pulled up and the lateral hole 118 is opened. On the other hand, in the state where the rod 115 is projected as shown in FIG. 12B, the opening / closing element 119 is pushed down to close the lateral hole 118, and the opening / closing even if the laser beam is emitted from the laser oscillator 100. Blocked by child 119. The latching solenoid 114 is shown in FIG.
(B) Even if the excitation is turned off in any state, the rod 115 can be held in each state.

As shown in FIGS. 1 and 3, a control panel 120 is provided on the front surface of the sewing machine frame 14 at the right position of each laser head 40. The control panel 12 shown in FIG.
0 is shown in an enlarged view. As is apparent from this drawing, the control panel 120 includes a test switch 122 for instructing laser beam irradiation at the time of laser beam power adjustment, up / down switches 123, 124 for adjusting laser beam irradiation power,
A display unit 126 for displaying the power of the laser beam, and an elevating switch 12 for instructing the driving of the air cylinder 70 for elevating the protection cylinder 50 of the laser head 40.
5 and a toggle switch 128 are provided. As shown in FIG. 13B, the toggle switch 128 can be switched in three steps of upper, middle and lower. If the operating force is released, the toggle switch 128 can be switched by the force of the built-in spring with a solid line. It automatically returns to the middle position shown.

Now, in the laser beam machine having the above construction,
When the main switch (not shown) is turned on, the laser oscillators 100 and the chiller box 108 are turned on, preheating of the laser oscillators 100 is started, and cooling from the chiller box 108 to the laser oscillators 100 is started. Circulation supply of water is started. Therefore, various adjustments of the laser beam emitted from the laser oscillator 100 will be described.

Regarding Position Adjustment of Laser Beam 1. "Laser processing (cut)" is set on the operation panel 19 of the sewing machine shown in FIGS. 2. Lift switch 12 of the control panel 120
5, the protective cylinder 50 is lowered from the retracted position to the use position. 3. The test switch 1 of the control panel 120
22 and the up switch 123 are simultaneously pressed for a moment.
As a result, a test mode is set, and an extremely low level laser beam is emitted for a predetermined time. 4. It is confirmed that the laser beam emitted from each laser head 40 properly passes through the center of the beam hole 35 of the beam plate 34. When the laser beam deviates from the center of the beam hole 35, the deviation of the laser beam is corrected by adjusting the tilt of the mirror 88 in the beam guide 80 as described above.

4. Regarding the adjustment of the power of the laser beam, after carrying out the operations 1 to 4 above, Switch to the "setting mode" on the operation panel 19 of the sewing machine. 6. Test switch 1 of the control panel 120
Since the laser beam is radiated only when the button 22 is pressed, the test cloth is placed on the beam plate 34 to check the cutting condition by the laser beam. The laser beam gradually powers up by continuously pressing the test switch 122 and the up switch 123 at the same time, and gradually powers down by continuously pressing the test switch 122 and the down switch 124 at the same time. The magnitude of this power is displayed on the display unit 126. The laser beam power adjustment by the operations 5 and 6 is performed for each laser head 40.

7. Adjustment of in-focus position After performing the operations 1 to 6 above, 7. The "focus position adjustment mode" is set on the operation panel 19 of the sewing machine, and the drive switch (not shown) of the laser head 40 drives and controls the motor 58 of the elevating mechanism 56 to adjust the height of the laser head 40. . As a result, the focus position of the lens 47 is adjusted. The adjustment of the focus position can also be performed for each laser head 40. The power adjustment of the laser beam and the adjustment of the focus position are performed every time the workpiece is replaced. Depending on the workpiece, it may be better to replace the lens 47 with one having a different focal length. In that case, the lens rack 44 of each laser head 40 is manually rotated as described above to select the lens 47 having a desired focal length.

Next, switching between sewing with the sewing machine head 20 (embroidery sewing) and laser processing with the laser head 40 will be described. First, after setting "Head selection" by the operation panel 19 of the sewing machine,
When the "sewing machine head" menu is selected, embroidery sewing is performed by the sewing machine head 20, and when the "laser head" menu is selected, laser processing by the laser head 40 is enabled. Although switching between embroidery sewing and laser processing can be performed manually, it is usually set in advance for these operations. This setting is performed by key input on the operation panel 19, and is set for each unit of embroidery sewing and laser processing. In the multi-needle type sewing head 20, it is necessary to preset the sewing needle 26 (needle bar) selected by sliding the needle bar case 24. Since there are six sewing needles 26 of each sewing machine head 20 as described above, when the "sewing machine head" menu is selected in the "head selection", the key inputs "1" to "6" on the operation panel 19 are selected. By sewing needle 2
6 can be set.

The difference between the movement control of the original frame 16 at the time of embroidery sewing and laser processing will be briefly described below. At the time of embroidery sewing, normal movement control is performed based on movement data (embroidery data). During the laser processing, the original frame 16 is continuously moved at a constant speed while linearly interpolating the movement control based on the embroidery data. That is, at the time of embroidery sewing, since the fabric frame 16 can be moved only while the sewing needle 26 is removed from the workpiece held by the fabric frame 16, the fabric frame 16 is intermittently moved. I have to move it. Further, when the embroidery is sewn, it suffices that the sewing needle 26 drop to a point according to the data, so the original frame 16 is not necessarily moved along the straight line connecting the points.

On the other hand, at the time of laser processing, the original frame 1
It is necessary to continuously move 6 at a constant speed along a straight line connecting the points of the data. However, when the stitch length of the embroidery data used for laser processing is set to be small to some extent, the laser processing can be performed even if the movement control of the original frame 16 is not necessarily linear interpolation or constant speed. In addition, at the time of this laser processing, the sewing machine head 20
The rotation of the main shaft of the sewing machine, which is the drive source for the needle bar, etc., is stopped.

Next, a simple appliqué creation by a combination of embroidery and laser processing (cutting) will be described. 14A and 14B show an example of the appliqué after it is created. In the appliqué of this drawing, a stitch 202 is formed on the peripheral portion of a circular base body 201, and a hollow body 301 of the alphabet “A” is sewn on the surface of the base body 201 with a stitch 302.

The procedure for making the appliqué will be described with reference to FIG. 15. First, a holding sheet 400 made of vinyl or the like is held in a stretched state on the original frame 16. Then, as shown in FIG. 15A, a sheet 200 as a material of the base body 201 is placed on a holding sheet 400, and a sheet 300 as a material of the hollow body 301 is further placed thereon.
Put. These sheets 200 and 300 are objects to be processed using cloth or leather. It is desirable that each sheet 2
00, 300 and 400 are temporarily adhered by spray glue or the like in order to prevent mutual displacement. In this state, the stitches 202 and 302 are respectively formed by the sewing operation of the sewing machine head 20 and the movement control of the original frame 16.

Thereafter, by irradiation of the laser beam by the laser head 40 and movement control of the original frame 16, the outer shape of the hollowed body 301 (alphabet "A") is cut out from the sheet 300 as shown in FIG. 15 (B). The outer portion of the sheet 300 is removed. At this time, the power of the laser beam is adjusted as described above so that the lower sheet 200 is not cut. After that, the irradiation of the laser beam from the laser head 40 and the movement control of the original frame 16 are performed, and as shown in FIG.
As shown in, the sheet 200 is cut along the outer shape (circular shape) of the substrate 201, and the excess portion of the sheet 200 is removed. Complete the appliqué with the holding sheet 400
To complete one work.

Next, the processing when the laser cutting is incomplete for some reason will be described with reference to FIGS. 16 and 17. Now, the above-mentioned sheet 300 is hollowed out 30
It is assumed that the cutting is in progress along the outer shape of No. 1 and that the cutting progresses from the starting point (and ending point) a to the point c shown in FIG. Then, at this time, it is assumed that, among the laser heads 40, there is a laser head (hereinafter also referred to as a “correction head”) in which cutting after point b is not performed as shown in FIG. In this case, first, the driving of the sewing machine is stopped, and the original frame 16 is arranged so that the irradiation point of the laser beam in the "correction head" corresponds to the point b, which is the starting point for recutting, by the frame back operation of the sewing machine. According to the movement data. The frame back operation in the sewing machine is to return the original frame 16 in the direction opposite to the traveling direction by one stitch or in a unit of a predetermined number of stitches based on the movement data. It is designed to be automatically executed according to instructions from the back. This function is used to redo the laser cut in the "correction head".

Then, when the toggle switch 128 of the control panel 120 corresponding to the "correction head" is once turned up and the sewing machine is restarted, the toggle switch 128 immediately returns to the middle position automatically. Starting point b from redo start point c to return the original frame 16
Until then, the laser beam is emitted only from the “correction head”. In other words, during this period, the laser beam is not emitted to the laser head 40 that has not once switched the toggle switch 128 of each control panel 120 up. Therefore, at the time of re-cutting, the laser beam is not radiated onto the portion which has already been properly cut by the laser head 40 other than the “correction head”, so that the lower sheet 200 is cut. And avoid burning. In this way, the cutting is redone by the "correction head" between the cutting start point b and the returning start point c of the original frame 16. Then, at the time when the original frame 16 reaches the return start point c, the irradiation of the laser beam from the other laser heads 40 is also restarted, and all the laser heads 40 cut the sheet 300 to the end point a.

Even if there is a laser head ("correction head") which is not cut after the point b shown in FIG. 17, the other laser head 40 is used by the other laser head 40 regardless of whether or not it is found. May be cut to the end point a, and the cutting may be restarted after the sewing machine stops by the stop code. That is, by the frame back operation, the original frame 16 is returned so that the irradiation point of the laser beam on the "correction head" corresponds to the cutting start point b, and the control panel 120 corresponding to the "correction head" is returned. After the toggle switch 128 is temporarily turned up, the sewing machine is restarted. As a result, the laser beam is emitted only from the "correction head", the cutting is repeated, and the sewing machine is stopped.

In order to stop the irradiation of the laser beam from the laser heads 40 other than the "correction head" in the recutting, the laser output of the laser oscillator 100 corresponding to these laser heads 40 may be stopped. Or these laser heads 40
The laser beam may be blocked by the blocking device 110 corresponding to. When the toggle switch 128 is switched to the down position, the corresponding laser head 40
Laser output from the laser oscillator 100 of
Therefore, by switching the toggle switch 128 downward, it is possible to set the laser heads 40 to individually stop.

The above-mentioned recutting operation is almost the same as the embroidery reworking operation at the time of sewing the embroidery by the sewing machine head 20, and its control is mainly performed by the key operation on the operation panel 19 of the sewing machine and the control. Toggle switch 128 on panel 120
And the processing of the sewing machine controller (microcomputer) based on the operation. Therefore, in the laser processing, for example, in FIG. 17, the frame back means for returning the original frame 16 from the point c to the starting point b of recutting, from the starting point b of this cutting start to the returning start point c of the original frame 16. Beam control means for stopping the irradiation of the laser beam from the laser head 40 other than the "correction head", or the laser beam from the laser head 40 other than the "correction head" at the time when the return start point c of the original frame 16 is reached. For each of the stop releasing means for releasing the irradiation stop of the sewing machine, the key operation on the operation panel 19 of the sewing machine and the control panel 120
Is mainly composed of the operation of the toggle switch 128 and the processing function of the control device of the sewing machine based on these operations.

[0042]

According to the present invention, when the laser processing by any one of the plurality of laser heads is incomplete and the laser processing is performed again, the laser heads other than the laser head are connected to the holding frame from the starting point of the redone processing of the laser processing. By stopping the irradiation of the laser beam until the returning start point, it is possible to prevent the laser beam from being overlapped and irradiated on the portion of the workpiece where the laser processing is properly performed. In addition, the laser head that stopped the laser beam irradiation while re-doing the laser processing is released from the laser beam irradiation stop when the holding frame reaches its return start point. Laser processing can be automatically restarted.

[Brief description of drawings]

FIG. 1 is a front view of an embroidery sewing machine.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view showing a part of FIG. 1 in an enlarged manner.

FIG. 4 is a side view of FIG. 2 seen from the direction of arrow AA.

FIG. 5 is a side view showing a part of FIG. 4 in an enlarged manner.

FIG. 6 is a sectional view taken along line BB of FIG.

7 is an enlarged cross-sectional view taken along the line CC of FIG.

FIG. 8 is a sectional view taken along line DD of FIG. 7;

9 is an enlarged cross-sectional view showing a part of FIG.

FIG. 10 is a cross-sectional view showing an enlarged part of the beam guide body.

11 is a configuration diagram of FIG. 10 viewed from the direction of arrow E. FIG.

FIG. 12 is an enlarged cross-sectional view showing a blocking device.

FIG. 13 is a configuration diagram showing a control panel.

FIG. 14 is an explanatory diagram illustrating an example of an appliqué after being created.

FIG. 15 is an explanatory diagram showing a procedure for creating an applique.

FIG. 16 is an explanatory diagram showing a state of proper laser cutting.

FIG. 17 is an explanatory diagram showing an incomplete laser cut state.

[Explanation of symbols]

 16 original web frame (holding frame) 40 laser head 100 laser oscillator 200, 300 sheet (workpiece)

Claims (2)

[Claims] 1. A holding frame that holds a workpiece and is controlled to move based on movement data in both X and Y directions, and a laser beam emitted from a laser oscillator is individually irradiated to the workpiece. A laser processing machine having a plurality of laser heads, wherein the holding frame is moved to a desired position according to the movement data when the laser processing of the workpiece by any one of the laser heads is redone. The frame back means that can be returned and the laser beam from the laser head other than the laser head that re-performs the laser processing only between the start point of re-starting the laser processing and the start point of returning the holding frame by the frame back means. A laser processing machine comprising: a beam control unit for stopping irradiation. 2. The laser processing machine according to claim 1, wherein the beam control means releases the irradiation stop of the laser beam of the laser head other than the laser head performing the laser processing again at the returning start point of the holding frame. Laser processing machine characterized by having.