WO1994021417A1 - Laser beam machining method and apparatus therefor - Google Patents
Laser beam machining method and apparatus therefor Download PDFInfo
- Publication number
- WO1994021417A1 WO1994021417A1 PCT/JP1994/000443 JP9400443W WO9421417A1 WO 1994021417 A1 WO1994021417 A1 WO 1994021417A1 JP 9400443 W JP9400443 W JP 9400443W WO 9421417 A1 WO9421417 A1 WO 9421417A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- point
- processing
- machining
- laser
- periphery
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
Definitions
- the present invention relates to a laser processing method and apparatus for performing laser processing by irradiating a workpiece with a laser beam, and more particularly to a laser processing method for performing processing of a shape in which a processing start point and a processing end point coincide. And a device therefor. Background technology
- FIGS. 4 (A) and 4 (B) are illustrations of conventional drilling. As shown in Fig. 4 (A), when drilling, first drill at point P1, then cut from point P1 to point Q1, and cut at point Q1. She started the outer circumference machining and returned to Q1 point after making a full circle.
- a notch burn-through part
- the lower part of the plate melts down more than the original cut groove, and the cut surface is not vertical.
- the greater the thickness of the notch the greater the probability of occurrence.
- Stress was concentrated in that area, which was likely to cause cracking and destruction, and also impaired the appearance, which was considered to be a drawback of laser processing.
- FIGS. 5 (A) and 5 (B) an experiment as shown in FIGS. 5 (A) and 5 (B) was performed.
- Fig. 5 (A) drilling is performed at point P2, and then cutting is performed to point R2 via point Q2.
- the point Q2 is the force corresponding to the start point of the outer peripheral machining. At this stage, almost no notch was formed at the start point Q2.
- Fig. 5 (B) drilling is performed at point P3, and after that, in cutting, it reaches point R3 via point Q3, and then moves to point S3 for drilling. Then, the cutting process reaches Q3 point again, and the cutting process ends at that Q3 point.
- a notch was formed at Q3, which corresponds to the start and end points of the outer periphery machining. In other words, it was found that when the start point and the end point of the outer peripheral machining coincide, a notch occurs. Disclosure of the invention
- the present invention has been made in view of such a point, and a laser processing method and a laser processing method in which a notch is not generated even when performing processing of a shape in which a processing start point and a processing end point match each other.
- Equipment The purpose is to provide.
- a laser processing method for performing laser processing by irradiating a laser beam onto a workpiece, when performing processing of a shape such that a processing start point and a processing end point match, the processing end point is set to the processing start point.
- the laser processing method is characterized in that the laser processing is performed with the laser processing set near the laser beam.
- a laser processing apparatus that performs laser processing by irradiating a laser beam onto a workpiece, when performing processing in a shape such that a processing start point and a processing end point match, the processing end point is determined by the processing start point.
- a laser processing apparatus having laser processing means for performing processing based on a processing trajectory obtained by being set near a point.
- FIGS. 1 (A) and 1 (B) are diagrams schematically showing an overall configuration for executing the laser processing method of the present invention.
- FIG. 1 (A) is an overall view, and FIG. Indicates the machining path, respectively.
- FIG. 2 is a flowchart showing the processing procedure of the present invention.
- Figure 3 shows the overall configuration of the laser processing device.
- FIGS. 4 (A) and 4 (B) are explanatory views of conventional drilling.
- FIG. 4 (A) shows a machining locus
- FIG. 4 (B) shows a cutout. Shown respectively,
- Figs. 5 (A) and 5 (B) are explanatory diagrams when a notch occurs, Fig. 5 (A) shows the case where it does not occur, and Fig. 5 (B) shows the case where it occurs. .
- FIGS. 1 (A) and 1 (B) are diagrams schematically showing an overall configuration for executing the laser processing method of the present invention.
- FIG. 1 (A) is an overall diagram, and FIG. Indicates a processing locus.
- CNC 10 controls the operation of the entire laser processing apparatus based on a processing program stored in a memory. That is, the finger pointing signal is sent to the laser oscillator 20 to control the output of the laser beam.
- a command signal is sent to the machining head 35 and a machining table (not shown) to perform movement control, feed speed control, and the like.
- the processing head 35 condenses the laser beam from the laser oscillator 20 and emits it to the work 38, moves along the processing locus 40, and performs perimeter processing for drilling the work 38.
- the processing procedure at that time will be described with reference to Fig. 1 (B).
- the outer periphery drilling starts with drilling at point P.
- cutting is performed from the point P to the point Q
- the outer periphery processing is started at the point Q
- the cutting is performed along the processing locus 40
- the point R is reached. Machining conditions are changed at point R to reach point S, and at point S, outer peripheral machining is completed.
- the processing trajectory 40 is generated by subtracting the minute distance 1 minute between the Q point and the S point, and the processing trajectory 40 is stored in the memory.
- the minute distance ⁇ L 1 is set to such an extent that the inner portion of the outer periphery can be quickly removed when the outer periphery processing is completed.
- the value of the minute distance is usually about 1 mm.
- the CNC 10 subtracts the predetermined distance ⁇ L 2 minutes preset in the memory from the position of the processing end point S, sets the R point before the processing end point S, and sets the R point at that R point.
- Change the processing conditions By changing the processing conditions, for example, the moving speed becomes slower, and the laser beam output becomes lower.
- the change of the processing conditions at the point R is performed in steps. Alternatively, it may be performed gradually from point R to point S.
- FIG. 2 is a flowchart showing the processing procedure of the present invention.
- the number following S represents the step number.
- the machining end point S is set by subtracting the minute distance ⁇ L1 from the start point Q of the outer peripheral machining, and the machining locus 40 is generated.
- FIG. 3 is a diagram showing the overall configuration of a laser processing apparatus to which the present invention is applied.
- the laser processing device is composed of a numerical controller (CNC) 10, a laser oscillator 20 and a laser processing machine 30.
- the CNC 10 is configured around a processor 11.
- EPR0M or EER0M is used for ROM12, and the system program is stored.
- the non-volatile memory 13 uses a battery-backed-up CM0S, and stores a machining program to be retained even after power is turned off, a program for executing the present invention, various parameters, and the like.
- the processor 11 reads out a machining program and a program for executing the present invention based on the system program, and controls the operation of the entire apparatus.
- the I / O unit 15 converts the control signal from the processor 11 and sends it to the laser oscillator 20.
- the laser oscillator 20 emits a pulsed laser beam 21 in accordance with the converted control signal.
- the laser beam 21 is reflected by the bending mirror 22 and sent to the laser beam machine 30.
- the CNC 10 is connected to the CRT MDI 16, and various programs and data are input in an interactive manner by using the CRTZ MDI 16.
- the laser processing machine 30 includes a processing machine main body 34, a processing head 35 for irradiating the work 38 with the laser beam 21, and a table 37 to which the work 38 is fixed.
- the laser beam 21 introduced and focused on the processing head 35 is irradiated on the workpiece 38 from the nozzle 36.
- the laser beam machine main body 34 is provided with servomotors 31 and 32 for controlling the movement of the table 37 in two directions of the X axis and the Y axis.
- a suction head 33 for controlling the movement of the processing head 35 in the Z-axis direction.
- These servo modules 31 1, 32 and 33 are the servo amplifiers 17 on the CNC 10 side, 18 and 19, respectively, and its rotation is controlled according to an axis control signal from the processor 11.
- the table 37 and the processing head 35 move according to the rotation.
- the laser beam 21 emitted from the nozzle 36 draws a locus on the work 38 in accordance with the movement of the table 37, and cuts the work 38 into a predetermined shape.
- the machining start point Q and the machining end point S of the outer machining are not coincident with each other, and the machining end point S is set by subtracting a minute distance for one minute. . For this reason, it is possible to avoid the occurrence of a notched portion (burned-out portion) that occurs when the processing start point and the processing end point are aligned. Therefore, cracks and destruction due to stress concentration can be prevented, and the appearance of the product can be improved.
- the machining end point S is set by subtracting a minute distance ⁇ L1 from the machining start point Q of the outer periphery machining (', but an arbitrary position near the machining start point Q, for example, It is also possible to set a position on the trajectory of the outer circumference that has passed the processing start point Q by a predetermined distance, or to set the processing end point S inside the outer circumference, in which case the above minute distance is reduced by 1 minute. It is possible to obtain the same effect as when the setting is made, and it is possible to avoid the occurrence of a notch at the machining end point S.
- the processing start point and the processing end point In the case of performing machining of a shape that matches the shape, laser machining is performed with the machining end point set near the machining start point. For this reason, it is possible to avoid the occurrence of a notched portion (burned-out portion) that occurred when the processing start point and the processing end point were aligned.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94910044A EP0646434A1 (en) | 1993-03-25 | 1994-03-17 | Laser beam machining method and apparatus therefor |
KR1019940704225A KR950701560A (ko) | 1993-03-25 | 1994-03-17 | 레이저 가공 방법 및 그 장치(laser beam machining method and appa-ratus therefor) |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5/65816 | 1993-03-25 | ||
JP5065816A JPH06269967A (ja) | 1993-03-25 | 1993-03-25 | レーザ加工方法及びその装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994021417A1 true WO1994021417A1 (en) | 1994-09-29 |
Family
ID=13297933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/000443 WO1994021417A1 (en) | 1993-03-25 | 1994-03-17 | Laser beam machining method and apparatus therefor |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0646434A1 (ja) |
JP (1) | JPH06269967A (ja) |
KR (1) | KR950701560A (ja) |
WO (1) | WO1994021417A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012063668A1 (ja) * | 2010-11-09 | 2012-05-18 | 株式会社 アマダ | レーザ加工方法、及び、レーザ加工装置 |
CN102489884A (zh) * | 2011-12-02 | 2012-06-13 | 深圳光韵达光电科技股份有限公司 | 一种激光切割圆孔或椭圆孔的方法 |
WO2013065484A1 (ja) * | 2011-11-02 | 2013-05-10 | 日酸Tanaka株式会社 | レーザ切断方法及びレーザ切断装置 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015211403B4 (de) * | 2015-06-22 | 2022-01-27 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Verfahren zum Reduzieren von Ansatzmarken beim Laserschneiden von Werkstückteilen |
CN107283069B (zh) * | 2016-04-01 | 2019-04-12 | 大族激光科技产业集团股份有限公司 | 一种激光切割的收刀工艺 |
JP6754621B2 (ja) * | 2016-06-10 | 2020-09-16 | 日東電工株式会社 | フィルムの切り抜き方法 |
DE102018126106A1 (de) | 2018-10-19 | 2020-04-23 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Verfahren zur Bestimmung eines Freischnittpunkts beim Trennen eines Werkstückteils von einem Restteil und Programmiereinrichtung hierfür |
DE102020131869A1 (de) * | 2020-12-01 | 2022-06-02 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Laserschneidverfahren zum Ausschneiden eines Werkstückteils |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59144588A (ja) * | 1983-02-07 | 1984-08-18 | Amada Co Ltd | レ−ザ加工による積層金型の製作方法 |
JPS63104793A (ja) * | 1986-10-20 | 1988-05-10 | Canon Inc | レ−ザ切断方法 |
JPH03210981A (ja) * | 1990-01-17 | 1991-09-13 | Mitsubishi Electric Corp | 鉄系厚板材のレーザ切断法 |
-
1993
- 1993-03-25 JP JP5065816A patent/JPH06269967A/ja not_active Withdrawn
-
1994
- 1994-03-17 KR KR1019940704225A patent/KR950701560A/ko not_active Application Discontinuation
- 1994-03-17 WO PCT/JP1994/000443 patent/WO1994021417A1/ja not_active Application Discontinuation
- 1994-03-17 EP EP94910044A patent/EP0646434A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59144588A (ja) * | 1983-02-07 | 1984-08-18 | Amada Co Ltd | レ−ザ加工による積層金型の製作方法 |
JPS63104793A (ja) * | 1986-10-20 | 1988-05-10 | Canon Inc | レ−ザ切断方法 |
JPH03210981A (ja) * | 1990-01-17 | 1991-09-13 | Mitsubishi Electric Corp | 鉄系厚板材のレーザ切断法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012063668A1 (ja) * | 2010-11-09 | 2012-05-18 | 株式会社 アマダ | レーザ加工方法、及び、レーザ加工装置 |
JP2012115899A (ja) * | 2010-11-09 | 2012-06-21 | Amada Co Ltd | レーザ切断加工方法及びレーザ加工装置 |
WO2013065484A1 (ja) * | 2011-11-02 | 2013-05-10 | 日酸Tanaka株式会社 | レーザ切断方法及びレーザ切断装置 |
US9434024B2 (en) | 2011-11-02 | 2016-09-06 | Nissan Tanaka Corporation | Laser cutting method and laser cutting device |
CN102489884A (zh) * | 2011-12-02 | 2012-06-13 | 深圳光韵达光电科技股份有限公司 | 一种激光切割圆孔或椭圆孔的方法 |
Also Published As
Publication number | Publication date |
---|---|
KR950701560A (ko) | 1995-04-28 |
EP0646434A1 (en) | 1995-04-05 |
JPH06269967A (ja) | 1994-09-27 |
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