JP4276573B2 - Laser processing method and laser processing machine - Google Patents

Description

  The present invention provides, for example, a laser processing method for supplying a laser beam output from one laser oscillator to a plurality of laser irradiation units, and processing a predetermined processing region of a workpiece for each laser irradiation unit, and laser processing Related to the machine.

  In order to improve machining efficiency, a laser output from one laser oscillator is supplied to a plurality of laser irradiation units (hereinafter referred to as “heads”), and a predetermined machining area of a workpiece is machined for each head. There is known a laser beam machine configured to do so (Patent Document 1).

  When such a laser processing machine is used, not only the same number of workpieces as the head can be processed simultaneously, but even a single large workpiece can be processed efficiently.

  In addition, some workpieces have machining points on both the front and back surfaces (that is, both sides), but when machining multiple such workpieces, machining of one surface is applied to all workpieces. Then, the other surface can be processed efficiently.

JP 2000-263271 A

  By the way, plate-like workpieces that have not been processed or have been processed are usually aligned, transported, or stored in a stacked state.

  In particular, during alignment and conveyance, the workpieces may slide with each other, and scratches may occur on the surface of the workpiece due to friction. As the number of such alignments and conveyances increases, the number of scratches increases, so that the processing quality decreases.

  Further, when processing the other surface, there is a possibility that a processing defect may occur due to a workpiece setting error.

  An object of the present invention is to provide a laser processing method and a laser processing machine that solve the above-described problems and are excellent in processing quality and work efficiency.

In order to solve the above problems, the present invention supplies the laser light output from one laser oscillator (6) to the two laser irradiation units ( 10a, 10b), and the two laser irradiation units (1 0a, 10b ) in a laser processing method for processing a workpiece (4) arranged opposite to
The first table (3a) and the second table (3b) arranged at a position where the first table (3a) is reversed around one axis are arranged in one XY table (2). In addition, the two laser irradiation parts (10a, 10b) are arranged to face the first table (3a) and the second table (3b), respectively.
A first step of placing a raw workpiece (4) on the first table (3a);
A second step of processing the workpiece (4) placed on the first table (3a);
The first table (3a) is turned upside down around one axis and overlapped with the second table (3b), and the workpiece (4) on the first table (3a) is placed on the second table (3b). ) A third step of placing it upside down and placing it on top;
A fourth step of returning the first table (3a) to its original position;
A fifth step of placing the raw workpiece (4) on the first table (3a);
A sixth step of processing the workpiece (4) placed on the first table (3a) and the second table (3b) at a time by moving the XY table (2) in the XY direction; ,
A seventh step of discharging the workpiece (4) placed on the second table (3b);
Repeating the steps from the third step to the seventh step until there is no unprocessed workpiece (4), and
It is characterized by that.

The present invention also provides a laser oscillator (6) and distribution supply means (for example, 7, 8a1) capable of supplying the laser light output from the laser oscillator (6) to the two laser irradiation units ( 10a, 10b). , 8a2, 9a, 8b1, 8b2, 9b), and a laser processing machine (100) for processing a workpiece (4) disposed facing the two laser irradiation sections ( 10a, 10b ) ,
A first table (3a) that is provided on an XY table (2) that moves in the XY direction and holds the workpiece (4);
A reversing device (80) provided on the XY table (2) for reversing the first table (3a) about one axis;
A second table (3b) provided on the XY table (2) and disposed at a position in which the first table (3a) is reversed about one axis by the reversing device (80). ,
Processing the workpiece (4) held on the first table (3a) and the workpiece (4) held on the second table (3b) at a time,
It is characterized by that.

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, this is for convenience for making an understanding of invention easy, and has no influence on the structure of a claim. It is not a thing.

  Since double-sided machining of workpieces can be performed within a single machining process using a single laser beam machine, operations that may cause damage such as workpiece loading, unloading, and loading operations are not performed. In addition, it is possible to perform double-side processing of a workpiece in a state where the workpiece is accurately positioned. Thereby, processing quality and work efficiency can be improved.

  FIG. 1 is a front view showing a configuration of a laser beam machine according to the present invention, and FIG. 2 is an operation explanatory view of a machining table.

  As shown in FIG. 1, a laser processing machine 100 according to the present invention includes a laser processing machine main body A, a carry-in device B, and a carry-out device C.

  First, the configuration of the laser processing machine main body A will be described. An XY table 2 is arranged on the bed 1 of the laser processing machine main body A. The XY table 2 is movable on the bed 1 in the horizontal X and Y directions. Two tables 3 a and 3 b are arranged on the XY table 2.

  A plurality of holes are formed on the surfaces of the tables 3a and 3b so as to be connected to internal hollow portions, and these hollow portions are connected to a vacuum source (not shown). The table 3a is connected to a reversing device 80 disposed between the table 3a and the table 3b.

  As shown in FIG. 2, the reversing device 80 has a rotating shaft 81 connected to a motor or the like (not shown). The table 3 a is rotated 180 degrees around the rotating shaft 81 to suck the work 4. The table 3a can be stacked on the table 3b without a gap.

  The gate-shaped column 5 is fixed to the bed 1. A laser oscillator 6 is placed on the column 5. On the optical axis of the laser oscillator 6, an acousto-optic element 7 that emits light to the first optical path La or the second optical path Lb is disposed. On the first optical path La, mirrors 8a1, 8a2, a pair of galvano scanners 9a, and an fθ lens (one laser irradiation unit) 10a are arranged. Further, mirrors 8b1, 8b2, a pair of galvano scanners 9b, and an fθ lens (the other laser irradiation unit) 10b are arranged on the second optical path 30b. These fθ lenses 10a and 10b are arranged in parallel as a pair of two places.

  In other words, the laser light output from the laser oscillator 6 is selected by the acousto-optic element 7 as to the optical path La or the optical path Lb, and is sent to the pair of galvano scanners 9a or galvano scanners 9b via the mirrors 8a1, 8a2 or mirrors 8b1, b2. Incident (that is, distribution supply means for distributing and supplying laser light). Then, the workpieces 4 are respectively positioned in the XY directions and pass through the fθ lens 10a or the fθ lens 10b to process the workpieces 4 respectively. Even when the workpiece 4 is placed on only one of the tables 3a and 3b, the workpiece 4 can be processed by selectively irradiating only one of the tables with the laser beam.

  Next, the carry-in device B will be described. The slider 12 of the carry-in device B can reciprocate on the rail 11 in the left-right Y direction in the figure. One end of a lifter 13 that is extendable in the vertical direction in the figure is fixed to the lower portion of the slider 12. A plate 14 is fixed to the other end (tip) of the lifter 13. A work holder 16 is supported on the plate 14 via a guide rod 15 so as to be movable in the vertical direction in the figure.

  A plurality of holes connected to an internal hollow portion are formed on the lower surface of the work holder 16, and the hollow portion is connected to a vacuum source (not shown). The spring 17 urges the workpiece holder 16 in a direction away from the plate 14.

  The standby position of the slider 12 is a position indicated by a solid line in the figure. Further, the supply position of the slider 12 (not shown) is a position facing the table 3a on the XY table 2 where the work holder 16 is positioned at the work transfer position. When the slider 12 is in the standby position, the plate 14 is at the rising end.

  The supply stocker 20 is disposed so as to face the work holding table 16 when the slider 12 is disposed at the standby position. A workpiece 4 is placed on the upper surface of the supply stocker 20.

  Next, the carry-out device C will be described. The slider 52 of the carry-out device C can reciprocate on the rail 51 in the left-right Y direction in the figure. One end of a lifter 53 that is extendable in the vertical direction in the figure is fixed to the lower portion of the slider 52. A plate 54 is fixed to the other end (tip) of the lifter 53. A work holding base 56 is supported on the plate 54 via a guide rod 15 so as to be movable in the vertical direction in the figure.

  A plurality of holes are formed on the lower surface of the work holding table 56 to connect to an internal hollow portion, and the hollow portion is connected to a vacuum source (not shown). The spring 17 biases the work holding base 56 in a direction away from the plate 54.

  The standby position of the slider 52 is a position indicated by a solid line in the figure. When the slider 52 is at the discharge position that is the right end of movement (not shown), the work holding table 56 faces the table 3b on the XY table 2 positioned at the work transfer position. When the slider 52 is in the standby position, the plate 54 is at the rising end.

  The discharge stocker 60 is disposed so as to face the work holding table 56 when the slider 52 is disposed at the standby position. The upper surface of the discharge stocker 60 is formed flat, and the workpiece 4 that has been processed is placed thereon.

Next, the process of processing the workpiece 4 in the laser processing machine 100 will be described along the following procedure. Note that the workpiece 4 is placed only on the supply stocker 20 before the machining is started. The sliders 12 and 52 are in the standby position.
Procedure 1. After the plate 14 is lowered and the lower surface of the work holding table 16 is brought into contact with the work 4 on the supply stocker 20, the work 4 is attracted to the work holding table 16.
Procedure 2. The plate 14 is raised to the standby position.
Procedure 3. The XY table 2 is moved to the workpiece delivery position (move toward the front side in FIG. 1).
Procedure 4. The slider 12 is moved so that the work holding table 16 faces the table 3a.
Procedure 5. The plate 14 is lowered, and the workpiece 4 held on the workpiece holder 16 is brought into contact with the table 3a.
Procedure 6. After the vacuum source (not shown) is turned on to attract the workpiece 4 to the table 3a, the suction of the workpiece holder 16 is released.
Step 7. After raising the plate 14, the slider 12 is moved to the standby position.
Procedure 8. The XY table 2 is moved to the workpiece machining position, and the table 3a (that is, the workpiece 4) is disposed so as to face the fθ lens 10a (move toward the back of the paper surface in FIG. 1).
Procedure 9. The machining of the workpiece 4 held on the table 3a is started, and the operations of procedures 1 and 2 are performed.
Procedure 10. After the processing is completed, the XY table 2 is moved to the workpiece transfer position (move toward the front side in FIG. 1).
Procedure 11. The table 3a holding the workpiece 4 is rotated 180 degrees around the rotation shaft 81, and the table 3a is inverted and overlapped with the table 3b. As a result, the workpiece 4 sucked by the table 3a is positioned in an inverted state at the processing position of the table 3b.
Procedure 12. After the table 3b starts the suction operation, the suction operation of the table 3a is stopped. As a result, the workpiece 4 is attracted and fixed to the table 3b.
Procedure 13. The table 3a is rotated 180 degrees around the rotation shaft 81 to return to the state shown in the figure.
Procedure 14. The unprocessed workpiece 4 is held on the table 3a by procedures 4-7.
Procedure 15. The XY table 2 is moved to the workpiece machining position, and the table 3a and the table 3b (that is, the workpiece 4) are disposed so as to face the fθ lens 10a and the fθ lens 10b (moved in the depth direction in FIG. 1).
Procedure 16. Machining of the workpiece 4 held on the table 3a and the workpiece 4 held on the table 3b is started, and the operations of procedures 1 and 2 are performed. In this case, the workpiece 4 held on the table 3a is processed on the front side, and the workpiece 4 held on the table 3b is processed on the back side.
Procedure 17. After the processing is completed, the XY table 2 is moved to the workpiece transfer position (move toward the front side in FIG. 1).
Procedure 18. The slider 52 at the standby position is moved to the discharge position.
Procedure 19. The plate 54 is lowered, and the lower surface of the work holding table 56 is brought into contact with the work 4 on the table 3b.
Procedure 20. After the workpiece 4 is attracted to the workpiece holding table 56, the adsorption operation of the table 3b is stopped.
Procedure 21. The plate 54 is raised and the slider 52 is moved to the standby position. Further, the work 4 on the table 3a is held on the table 3b by procedures 11 to 13.
Procedure 22. The unprocessed workpiece 4 is held on the table 3a by procedures 4-7.
Procedure 23. The XY table 2 is moved to the workpiece machining position, and the table 3a and the table 3b (that is, the workpiece 4) are disposed so as to face the fθ lens 10a and the fθ lens 10b (moved in the depth direction in FIG. 1).
Procedure 24. The laser processing machine main body A starts processing, the loading device B performs the operations in steps 1 and 2, and the unloading device C performs the following procedure 25, and waits for the end of the processing.
Procedure 25. After the work 4 held on the plate 54 is lowered and the lower surface of the work 4 held on the work holding table 56 is brought into contact with the upper surface of the discharge stocker 60, the suction operation of the work holding table 56 is stopped, and the plate 54 Is raised to the standby position.

  Thereafter, steps 17 to 25 are repeated until the machining of the workpiece 4 prepared on the workpiece holder 16 is completed.

  Note that the workpiece 4 is not held on the table 3a while the last back surface of the workpiece 4 is processed.

  As described above, in the present invention, each workpiece 4 can be processed on both sides in a single processing step processed by one laser processing machine 100. (After processing the surface side, 4 is loaded on the stocker 60 of the carry-out device C, and there is no work that may cause scratches such as setting it again on the stocker 20 of the carry-in device B, and the work setup time is short and the work is changed. No mistakes or work waiting time occur. Further, since the work 4 is loaded on the stocker 60 of the carry-out apparatus C and is not loaded again on the stocker 20 of the carry-in apparatus B, the scratches generated on the processed surface of the work 4 are reduced by reducing the number of times of loading. Can be prevented.

  Further, since the workpiece 4 is directly transferred between the tables 3a and 3b, the positioning accuracy can be increased and the machining accuracy can be improved.

  If the work supply stocker 20 and the work discharge stocker 60 are provided with an elevating device so that the height of the uppermost work 4 is always constant, the work holding bases 16 and 56 are allowed to suck or remove the work 4. Can be performed reliably and promptly.

  Moreover, if the workpiece stocker 20 is provided in the supply stocker 20 and the table 3a, the processing accuracy can be improved.

  Moreover, although the case where the table 3 was two was demonstrated, also when the table 3 is four or more, a workpiece | work can be processed in the procedure similar to the above.

It is a front view which shows the structure of the laser beam machine which concerns on this invention. It is operation | movement explanatory drawing of the process table which concerns on this invention.

Explanation of symbols

4 Work 6 Laser oscillator 7 Distribution supply means (acousto-optic element)
8a1 Distribution supply means (mirror)
8a2 Distribution supply means (mirror)
9a Distribution supply means (galvano scanner)
8b1 Distribution supply means (mirror)
8b2 Distribution supply means (mirror)
9b Distribution supply means (galvano scanner)
10a Laser irradiation part (fθ lens)
10b Laser irradiation part (fθ lens)
80 Reversing apparatus 100 Laser processing machine

Claims (2)

In the laser processing method in a laser beam outputted from one laser oscillator is supplied to the two laser irradiation unit, for processing the placed workpiece in opposition to the two laser irradiation portion,
The first table and the second table arranged at a position where the first table is turned upside down around one axis are arranged on one XY table, and the two laser irradiation units are arranged on the first table. It is placed facing each of the 1 table and the 2nd table,
A first step of placing an unprocessed workpiece on the first table;
A second step of processing the workpiece placed on the first table;
A third step of reversing the first table around one axis and superimposing it on the second table, and placing the work on the first table on the second table by reversing the front and back; ,
A fourth step of returning the first table to the original position;
A fifth step of placing an unprocessed workpiece on the first table;
A sixth step of moving the XY table in the XY direction and machining the workpieces placed on the first table and the second table at a time;
A seventh step of discharging the work placed on the second table;
Repeating the steps from the third step to the seventh step until there is no unprocessed workpiece, and
The laser processing method characterized by the above-mentioned. Laser machining and laser oscillator, a dispensing means capable of providing an output laser beam into two laser irradiation portion from said laser oscillator, comprising a, a work which is arranged to face the two laser irradiation portion In the processing machine,
A first table provided on an XY table that moves in an XY direction and holds a workpiece;
A reversing device provided on the XY table and reversing the first table about one axis;
A second table provided on the XY table, and arranged at a position where the first table is reversed front and back about one axis by the reversing device,
Processing the workpiece held on the first table and the workpiece held on the second table at a time,
A laser processing machine characterized by that.

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