CN110293326A - A kind of method of double light beam laser cutting slab - Google Patents

A kind of method of double light beam laser cutting slab Download PDF

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Publication number
CN110293326A
CN110293326A CN201910693785.8A CN201910693785A CN110293326A CN 110293326 A CN110293326 A CN 110293326A CN 201910693785 A CN201910693785 A CN 201910693785A CN 110293326 A CN110293326 A CN 110293326A
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China
Prior art keywords
laser
cutting
light beam
double light
auxiliary gas
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CN201910693785.8A
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Chinese (zh)
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CN110293326B (en
Inventor
吴杰
张明军
陈顺
戴家辉
曹太山
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Dragon Totem Technology Hefei Co ltd
Jilin Automan Steel Structure Co ltd
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Changsha University of Science and Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/12Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
    • B23K26/123Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36Removing material
    • B23K26/38Removing material by boring or cutting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70Auxiliary operations or equipment

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention discloses a kind of methods of double light beam laser cutting slab, it is characterised in that: step 1 provides incisory thick stainless steel plate;Step 2 removes the impurity in workpiece upper and lower surface to be cut and uses clamp;Step 3 provides double light beam laser diced system;Step 4 defines cutting introducing section in turning in laser cutting track and draws section;Step 5, starting double light beam laser diced system, open auxiliary gas supply system, provide the first auxiliary gas, implement double light beam laser and cut slab;Step 6, when laser compound cuts head be moved to turning cutting introduce section starting point when, increase by second auxiliary gas supply, start slab corner region cutting;Step 7, when laser compound cuts head be moved to turning cutting draw section terminating point when, close second auxiliary gas;Step 8 when reaching incision tip point, closes laser generator, completes cutting process.Compared with the existing technology, the present invention has good cutting effect, adaptable.

Description

A kind of method of double light beam laser cutting slab
Technical field
The present invention relates to a kind of laser cutting method more particularly to a kind of methods for being cut by laser slab corner.
Background technique
Currently, laser cutting technique is on a large scale in panel beating, metallurgical equipment, engineering machinery, accurate accessory, technique gift The numerous areas application such as product, household electrical appliance.Laser cut metal traditional at present is mainly using the light utilized in cutting head System, which converges to material surface, makes its thawing, and realizes cutting by providing auxiliary gas blasting's melted material.But in benefit When being cut by laser thick stainless steel plate with optical fiber, is intensively being accumulated in corner's laser energy, be easy to causeing corner " inverse Spray " phenomenon, causes cutting that can not carry out.
Disclosed on May 13rd, 2015, Publication No. " 104607805 A of CN ", a kind of entitled " corner The patent of invention of laser cutting method " discloses a kind of corner's laser cutting method, when laser cutting track reaches corner regions Domain, presets cutting power and cutting speed exports percentage, and control system is written by control instruction, adjusts cutting power and cuts Speed is cut, completes cutting, finishing control instruction, cutting is restored to normal cut state, but the technical solution there is a problem: In order to alleviate cutting area surface temperature, it is cooled down by increasing auxiliary gas.
Disclosed on August 10th, 2016, Publication No. " 105834595 A of CN ", entitled " a kind of wedge angle is sharp The patent of invention of light cutting method " discloses a kind of wedge angle laser cutting method, and the laser cutting method is by adjusting cutting function Rate is 250 W, collects in cutting head laser beam to metal material surface, and blow the auxiliary gas of 3 MPa, and in metal material Lower surface provides the negative pressure for being less than atmospheric pressure, according to the mobile cutting head of the speed of 800 mm/min;Improving laser cutting machine again Power is 500 W, and the negative pressure for being less than atmospheric pressure is provided in metal material lower surface, is moved according to the speed of 1500 mm/min Dynamic cutting head, the present invention can effectively be cut into good wedge angle, and there are still problems for the technical solution: cutting process medium temperature is spent Height is difficult to disperse in practical applications.
Summary of the invention
There is molten metal present invention aim to address laser cutting slab corner and " inverse spray " phenomenon occurs upwards, causes The problem of continuing cutting can not.
The technical solution of the present invention is to provide a kind of methods of double light beam laser cutting slab, it is characterised in that.
Step 1 provides incisory thick stainless steel plate.
Step 2 removes the impurity in workpiece upper and lower surface to be cut and uses clamp.
Step 3 provides double light beam laser diced system.
Step 4 defines cutting introducing section in turning in laser cutting track and draws section.
Step 5, starting double light beam laser diced system, open auxiliary gas supply system, provide the first auxiliary gas, real Apply double light beam laser cutting slab.
Step 6, when laser compound cuts head be moved to turning cutting introduce section starting point when, increase by second auxiliary gas supply It gives, starts the cutting of slab corner region double light beam laser.
Step 7, when laser compound cuts head be moved to turning cutting draw section terminating point when, close second auxiliary gas, Terminate corner region cutting.
Step 8 when reaching incision tip point, closes laser generator, completes cutting process.
Further, in step 2, thickness of workpiece to be cut is 20 ~ 50 mm.
Further, in step 3, double light beam laser diced system includes CO2Laser, single mode fiber laser, CO2 Laser delivery optics, optical-fiber laser transmission fiber, laser compound cuts head and auxiliary gas supply system.
Further, CO2Laser output power is 8 ~ 10 kW.
Further, single mode fiber laser output power is 8 ~ 10 kW.
Further, auxiliary gas supply system includes the first gas cylinder, the second gas cylinder, the first transmission pipeline, the second transmission Pipeline and gas assist nozzle.
Further, gas assist nozzle connect and fixes with laser compound cuts head.
Further, gas assist nozzle includes the first air cavity and the second air cavity, and the first air cavity and the second air cavity are equipped with The circular hole of several annular spreads.
Further, in step 4, workpiece turning to be cut form is circular arc or linear corner.
Further, in step 4, it is cut by laser turning cutting in track and introduces section d1For 10 ~ 30 mm.
Further, in step 4, it is cut by laser turning cutting in track and draws segment length d2For 10 ~ 20 mm.
Further, in steps of 5, CO2The focal position of laser is apart from workpiece surface δ1For 0 ~ 5 mm.
Further, in steps of 5, the focal position of single mode optical fiber laser is apart from workpiece surface δ2For 5 ~ 10 mm.
Further, CO2The focal position of laser and single mode optical fiber laser is 5 ~ 10 mm at a distance of Δ.
Further, in steps of 5, provide cutting the first auxiliary to the first air cavity of gas assist nozzle by the first gas cylinder Gas.
Further, the first auxiliary gas is N2, pressure is 15 ~ 30 MPa.
Further, in step 6, provide cutting the second auxiliary to the second air cavity of gas assist nozzle by the second gas cylinder Gas.
Further, the second auxiliary gas is Ar, and pressure is 20 ~ 35 MPa.
The beneficial effects of the invention are as follows.
1) in the present invention, using coaxial dual wavelength CO2Laser and single mode optical fiber laser implement thick plates cutting, effective land productivity With CO2Laser cutting process is stablized, and single mode optical fiber laser has many advantages, such as that focusing capability is strong, and material absorptivity is high, passes through The spatial position of two kinds of laser beams of preferred arrangement realizes that material to the efficient absorption of two laser energy, avoids photic plasma The generation of body obtains and stablizes cutting effect.
2) in the present invention, in coaxial dual wavelength CO2On the basis of laser and single mode optical fiber laser, cut using binary channels Gas is assisted, realizes the double-deck secondary air synchronous effect in slab corner region;In addition, outer layer secondary air is high pressure Ar, tool Have density big, impact force is strong, effectively inhibit be easy to produce in corner region cutting process energy concentrate and cause it is photic it is equal from Daughter shields laser beam, and then the problem of the unordered flowing of cutting region molten metal, and slab corner region stabilization may be implemented and cut It cuts.
3) method of a kind of double light beam laser cutting slab provided by the invention, it is crosscutting, vertical can to promote the use of slab Cut with all positon cutting etc. during, it is adaptable.
Detailed description of the invention
Fig. 1 is laser cutting process cut deal corner schematic diagram.
Fig. 2 is the inverse spray phenomenon schematic diagram of conventional laser cutting slab corner.
Fig. 3 is embodiment of the present invention schematic diagram.
Fig. 4 is gas assist nozzle top view.
Fig. 5 is gas assist nozzle main view.
Wherein: 1, CO2Laser beam, 2, single mode optical fiber laser beam, the 3, first reflecting mirror, the 4, second reflecting mirror, 5, focus it is saturating Mirror, 6, gas assist nozzle, the 601, first air cavity, the 602, second air cavity, 7, slot, 8, molten bath, 9, workpiece to be cut, 10, inverse Spray molten metal, 11, photo plasma, the 12, first transmission pipeline, the 13, second transmission pipeline, the 14, first gas cylinder, 15, the Two gas cylinders, 16, turning cutting introducing section starting point, 17, turning starting point, 18, turning terminating point, 19, turning cutting extraction section Terminating point.
Specific embodiment
Technical solution of the present invention is described in detail below in conjunction with attached drawing 1 ~ 5 and specific embodiment.
As shown in Fig. 1 ~ 5, in the embodiment of the present invention, a kind of method of double light beam laser cutting slab includes the following steps.
Step 1 provides incisory thick stainless steel plate.
Step 2 removes the impurity in 9 upper and lower surface of workpiece to be cut and uses clamp.
In the present embodiment, workpiece 9 to be cut is with a thickness of 20 ~ 50 mm.
Step 3 provides double light beam laser diced system.
In the present embodiment, double light beam laser diced system includes CO2Laser, single mode fiber laser, CO2Laser transmission Optical path, optical-fiber laser transmission fiber, laser compound cuts head and auxiliary gas supply system.
In the present embodiment, CO2Laser output power is 8 ~ 10 kW.
In the present embodiment, single mode fiber laser output power is 8 ~ 10 kW.
As shown in figure 3, auxiliary gas supply system includes the first gas cylinder 14, the second gas cylinder 15, first biography in the present embodiment Defeated pipeline 12, the second transmission pipeline 13 and gas assist nozzle 6, gas assist nozzle 6 connect and consolidate with laser compound cuts head It is fixed.
As shown in figure 4, gas assist nozzle 6 includes the first air cavity 601 and the second air cavity 602, the first gas in the present embodiment Chamber 601 and the second air cavity 602 are equipped with the circular hole of several annular spreads.
Step 4 defines cutting introducing section in workpiece turning to be cut in laser cutting track and draws section.
As shown in Figure 1,9 turning form of workpiece to be cut is circular arc or linear corner in the present embodiment.
As shown in Figure 1, it is one section of straight cuts apart from turning starting point 17 that turning cutting, which introduces section, in the present embodiment Area, turning cutting introduce segment length d1For 10 ~ 30 mm.
As shown in Figure 1, it is one section of straight cuts that turning terminating point 18 starts that section is drawn in turning cutting in the present embodiment Segment length d is drawn in area, turning cutting2For 10 ~ 20 mm.
Step 5, starting double light beam laser diced system, open auxiliary gas supply system, provide the first auxiliary gas, real Apply double light beam laser cutting slab.
In the present embodiment, CO2The focal position of laser beam 1 is apart from workpiece surface δ1For 0 ~ 5 mm.
In the present embodiment, the focal position of single mode optical fiber laser beam 2 is apart from workpiece surface δ2For 5 ~ 10 mm.
In the present embodiment, CO2The focal position of laser beam 1 and single mode optical fiber laser beam 2 is 5 ~ 10 mm at a distance of Δ.
In the present embodiment, cutting the first auxiliary gas is provided to 6 first air cavity 601 of gas assist nozzle by the first gas cylinder 14 Body, the first auxiliary gas is N2, pressure is 15 ~ 30 MPa.
Step 6, when laser compound cuts head be moved to turning cutting introduce section starting point 16 when, increase by second auxiliary gas Supply starts the cutting of slab corner region double light beam laser, and the second auxiliary gas is Ar, and pressure is 20 ~ 35 MPa.
In the present embodiment, cutting the second auxiliary gas is provided to 6 second air cavity 602 of gas assist nozzle by the second gas cylinder 15 Body.
Step 7, when laser compound cuts head be moved to turning cutting draw section terminating point 18 when, close second auxiliary gas Body terminates corner region cutting.
Step 8 when reaching incision tip point, closes laser generator, completes cutting process.
Above-described embodiment is one of embodiments of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation.Other any changes, modifications, substitutions, combinations, simplifications done without departing from spirit of the invention and principle, should all regard It include within that scope of the present invention for equivalent replacement mode.

Claims (9)

1. a kind of method of double light beam laser cutting slab, which comprises the steps of:
Step 1 provides incisory thick stainless steel plate;
Step 2 removes the impurity in workpiece (9) upper and lower surface to be cut and uses clamp;
Step 3 provides double light beam laser diced system;
Step 4 defines cutting introducing section in turning in laser cutting track and draws section;
Step 5, starting double light beam laser diced system, open auxiliary gas supply system, provide the first auxiliary gas, implement double Beam laser cuts slab;
Step 6, when laser compound cuts head be moved to turning cutting introduce section starting point (16) when, increase by second auxiliary gas supply It gives, starts the cutting of slab corner region double light beam laser;
Step 7, when laser compound cuts head be moved to turning cutting draw section terminating point (19) when, close second auxiliary gas, Terminate corner region cutting;
Step 8 when reaching incision tip point, closes laser generator, completes cutting process.
2. the method for double light beam laser cutting slab according to claim 1, it is characterised in that: in step 2, work to be cut Part (9) is with a thickness of 20 ~ 30 mm.
3. the method for double light beam laser cutting slab according to claim 1, it is characterised in that: in step 3, dual-beam swashs Light diced system includes CO2Laser, single mode fiber laser, CO2Laser delivery optics, optical-fiber laser transmission fiber, laser are multiple Close cutting head and auxiliary gas supply system, CO2Laser output power is 8 ~ 10 kW, single mode fiber laser output power For 8 ~ 10 kW.
4. the method for double light beam laser cutting slab according to claim 1, it is characterised in that: in step 3, assist gas Feed system includes the first gas cylinder (14), the second gas cylinder (15), the first transmission pipeline (12), the second transmission pipeline (13) and auxiliary Gas nozzle (6), gas assist nozzle (6) connect and fix with laser compound cuts head.
5. the method for double light beam laser cutting slab according to claim 1, it is characterised in that: in step 3, assist gas Nozzle (6) includes the first air cavity (601) and the second air cavity (602), and the first air cavity (601) and the second air cavity (602) are if be equipped with The circular hole of dry annular spread.
6. the method for double light beam laser cutting slab according to claim 1, it is characterised in that: in step 4, work to be cut Part (9) turning form is circular arc or linear corner, is cut by laser turning cutting in track and introduces section d1For 10~30 mm, laser Segment length d is drawn in turning cutting in cutting track2For 10 ~ 20 mm.
7. the method for double light beam laser cutting slab according to claim 1, it is characterised in that: in step 5, CO2Laser beam (1) focal position is apart from workpiece surface δ1For 0 ~ 5 mm, the focal position of single mode optical fiber laser beam (2) table on workpiece Face δ2For 5 ~ 10 mm, CO2The focal position of laser beam (1) and single mode optical fiber laser beam (2) is 5 ~ 10 mm at a distance of Δ.
8. the method for double light beam laser cutting slab according to claim 1, it is characterised in that: in step 5, pass through first Gas cylinder (14) provides cutting the first auxiliary gas to (6) first air cavity (601) of gas assist nozzle, and the first auxiliary gas is N2, Pressure is 15 ~ 30 MPa.
9. the method for double light beam laser cutting slab according to claim 1, it is characterised in that: in step 6, pass through second Gas cylinder (15) provides cutting the second auxiliary gas to (6) second air cavity (602) of gas assist nozzle, and the second auxiliary gas is Ar, Pressure is 20 ~ 35 MPa.
CN201910693785.8A 2019-07-30 2019-07-30 Method for cutting thick plate by double-beam laser Active CN110293326B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114871593A (en) * 2022-06-16 2022-08-09 西北工业大学太仓长三角研究院 Thick plate myriawatt-level optical fiber laser double-component gas-assisted cutting method
CN115673569A (en) * 2022-11-21 2023-02-03 长沙大科激光科技有限公司 Medium plate swinging laser cutting method
CN116673618A (en) * 2023-07-07 2023-09-01 珠海市申科谱工业科技有限公司 Laser drilling process for medical plastic catheter

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CN101474724A (en) * 2009-01-06 2009-07-08 深圳市大族激光科技股份有限公司 Laser cutting method for angle of rotation
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CN102069304A (en) * 2011-01-25 2011-05-25 哈尔滨工业大学 Protective device for laser welding
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CN202126514U (en) * 2011-06-17 2012-01-25 山西飞虹激光科技有限公司 Optical element used for laser processing and laser processing equipment
CN102896419A (en) * 2012-10-23 2013-01-30 华南师范大学 Double-laser beam compound welding device and use method thereof
CN103189160A (en) * 2010-11-01 2013-07-03 住友电气工业株式会社 Cutting tool, production method for same, and production device
CN104368911A (en) * 2014-10-28 2015-02-25 中国科学院宁波材料技术与工程研究所 Laser processing head, application of laser processing head and laser processing system and method
CN106346141A (en) * 2016-09-07 2017-01-25 华中科技大学 Metal cutting device based on composite laser beams

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GB2175737A (en) * 1985-05-09 1986-12-03 Control Laser Limited Laser material processing
CN1112866A (en) * 1994-02-24 1995-12-06 三菱电机株式会社 Laser cutting method eliminating defects in regions where cutting conditrons are changed
US20070235418A1 (en) * 2006-03-28 2007-10-11 Samsung Electronics Co., Ltd. Method for cutting substrate and substrate cutting apparatus using the same
CN101468429A (en) * 2007-12-27 2009-07-01 深圳市大族激光科技股份有限公司 Method for controlling speed of laser cutting
CN101474724A (en) * 2009-01-06 2009-07-08 深圳市大族激光科技股份有限公司 Laser cutting method for angle of rotation
US20110049764A1 (en) * 2009-09-02 2011-03-03 Lee Hyun-Chul Substrate cutting apparatus and method for cutting substrate using the same
CN103189160A (en) * 2010-11-01 2013-07-03 住友电气工业株式会社 Cutting tool, production method for same, and production device
CN102069304A (en) * 2011-01-25 2011-05-25 哈尔滨工业大学 Protective device for laser welding
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114871593A (en) * 2022-06-16 2022-08-09 西北工业大学太仓长三角研究院 Thick plate myriawatt-level optical fiber laser double-component gas-assisted cutting method
CN115673569A (en) * 2022-11-21 2023-02-03 长沙大科激光科技有限公司 Medium plate swinging laser cutting method
CN116673618A (en) * 2023-07-07 2023-09-01 珠海市申科谱工业科技有限公司 Laser drilling process for medical plastic catheter

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Effective date of registration: 20231219

Address after: No. 4388, Economic Development Street, Gongzhuling Economic Development Zone, Siping City, Jilin Province, 136000

Patentee after: Jilin Automan Steel Structure Co.,Ltd.

Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province

Patentee before: Dragon totem Technology (Hefei) Co.,Ltd.

Effective date of registration: 20231219

Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province

Patentee after: Dragon totem Technology (Hefei) Co.,Ltd.

Address before: School of automotive and mechanical engineering, Changsha University of technology, No. 960, Section 2, Wanjiali South Road, Tianxin District, Changsha City, Hunan Province, 410114

Patentee before: CHANGSHA University OF SCIENCE AND TECHNOLOGY