CN106513997B - Laser-arc hybrid welding method for myriawatt-level high-speed rail-mounted electric bottle box - Google Patents
Laser-arc hybrid welding method for myriawatt-level high-speed rail-mounted electric bottle box Download PDFInfo
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- CN106513997B CN106513997B CN201710008022.6A CN201710008022A CN106513997B CN 106513997 B CN106513997 B CN 106513997B CN 201710008022 A CN201710008022 A CN 201710008022A CN 106513997 B CN106513997 B CN 106513997B
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- 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
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
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Abstract
The invention discloses a laser-electric arc composite welding method for a myriawatt high-speed ferroelectric bottle box, which adopts laser and electric arc as a composite heat source, wherein laser welding beams comprise a first laser beam and a second laser beam, the first laser beam and the second laser beam respectively heat the surfaces of welding seams from the left side and the right side to weld, and are overlapped at the central part of the welding seams, so that the temperature of the central part of the welding seams is highest, and the temperature gradient is formed at the edge part and the central part, thereby avoiding the generation of splashing, preheating the edge part, reducing the temperature difference in the subsequent cooling process and reducing the tendency of generating cracks.
Description
Technical Field
The invention belongs to the technical field of material processing, and particularly relates to a laser-arc hybrid welding method for a high-speed rail electric bottle box.
Background
The battery box is a box body for accommodating the battery pack, and mainly plays roles of protecting the battery pack from collision, insulating and preventing water and helping the battery to dissipate heat. The laser-arc hybrid welding is widely applied to precision welding in industries such as automobiles, aerospace and ships, has the advantages of high energy density, accurate pointing, high thermoelectric conversion rate of arc plasma, mature process and the like, but because laser welding forms a laser keyhole on the welding surface through laser melting, the fluidity of molten pool metal is increased, a surge phenomenon is generated, the process is easy to generate a splashing problem, and because the central temperature of the molten pool is extremely high, the temperature difference between the molten pool and the edge of a welding seam during solidification is huge, stress concentration and cracks are easily generated, and the laser-arc hybrid welding is a reason for restricting further wide application of the laser-arc hybrid welding.
Disclosure of Invention
In order to solve the technical problems, the invention provides a laser method which is particularly suitable for a high-speed rail electric bottle box laser-arc composite welding method.
The complete technical scheme of the invention comprises the following steps:
a laser-electric arc composite welding method for a high-speed rail electric bottle box comprises the following steps:
1) processing a groove at the welding surface;
2) the welding process adopts laser and electric arc as a composite heat source, the laser welding beams comprise a first laser beam and a second laser beam, the first laser beam and the second laser beam respectively heat the surface of a welding seam from the left side and the right side to weld, the angle between the first laser beam and the second laser beam is 30-45 degrees, the first laser beam and the second laser beam respectively and obliquely irradiate the surface of the welding seam, the diameter range of the beams is from the edge of the welding seam to the position over the central line of the welding seam, but not more than the welding seam on the other side, namely, a part of the first laser beam and a part of the second laser beam respectively irradiate the edge of.
The groove is one of a Y-shaped groove, a U-shaped groove or a K-shaped groove.
The power of the first laser beam and the second laser beam is 2-4kW, the current is 200-220A, and the welding speed is 0.2-0.8 m/min.
The electric arc adopts a tungsten electrode, the length of the electric arc is 2-3 mm, the welding current is 100-150A, the welding speed is 0.2-0.8m/min, and the flow of argon gas is 12-18L/min;
compared with the prior art, the invention has the advantages that: the mode of oblique irradiation of two beams of laser is adopted, and the central part of the welding seam is partially overlapped, so that the temperature of the central part of the welding seam is the highest, and the temperature gradient is formed between the edge part and the central part, thereby avoiding the generation of splashing, preheating the edge part, reducing the temperature difference in the subsequent cooling process and reducing the tendency of generating cracks.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1:
processing a groove at the welding surface of the high-speed rail electric bottle box; adopting a Y-shaped groove with the angle of 26 degrees, the height of a truncated edge of 2mm and the clearance of the truncated edge of 1mm, and then adopting first CO2Laser and second CO2The laser welds along the welding seam from the left and right sides respectively, two bunches of laser angles 35 degrees, beam diameter 2mm, the marginal portion of beam one end crosses the welding seam edge, the edge of the other end crosses the welding seam central line, laser beam power is 2kW, the electric current is 220A, the welding speed is 0.6m/min, because oblique irradiation during welding, laser light heat conversion rate reduces, therefore the beam that crosses the welding seam edge can't melt the work piece, only make its temperature rise, and the beam area in the welding seam scope is big, the heat is many, the laser melts at the welding surface and forms the laser key hole, the heat that obtains simultaneously is from the welding seam edgeThe temperature is increased from the edge to the center in sequence, the molten metal in the molten pool at the center of the welding seam cannot jump out of the welding seam boundary, the splashing problem is reduced, meanwhile, the temperature difference between the temperature increase of the edge and the temperature in the welding seam is reduced, the tendency of crack generation is also reduced in the subsequent solidification process, a tungsten electrode is adopted for arc heating, the arc length is 2.5mm, the welding current is 50A, and the welding speed is the same as the laser advancing speed.
Compared with the prior art, the invention has the advantages that: the mode of oblique irradiation of two beams of laser is adopted, and the central part of the welding seam is partially overlapped, so that the temperature of the central part of the welding seam is the highest, and the temperature gradient is formed between the edge part and the central part, thereby avoiding the generation of splashing, preheating the edge part, reducing the temperature difference in the subsequent cooling process and reducing the tendency of generating cracks.
Example 2:
the groove adopts a V-shaped groove, the angle is 30 degrees, and the rest parameters are the same as those of the embodiment 1.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (1)
1. A laser-electric arc composite welding method for a myriawatt-level high-speed ferroelectric bottle box is characterized by comprising the following steps:
1) processing a groove at the welding surface;
2) the welding process adopts laser and electric arc as a composite heat source, laser welding beams comprise a first laser beam and a second laser beam, the first laser beam and the second laser beam respectively heat the surface of a welding seam from the left side and the right side to weld, the angle between the first laser beam and the second laser beam is 30-45 degrees, the first laser beam and the second laser beam respectively irradiate the surface of the welding seam in an inclined way, the diameter range of the beams is from the edge of the welding seam to the middle line of the welding seam crossing, but not exceeding the welding seam on the other side, namely, the first laser beam and the second laser beam respectively have a part to irradiate the edges of the left welding seam;
the groove is one of a Y-shaped groove, a U-shaped groove or a K-shaped groove;
the power of the first laser beam and the second laser beam is 2-4kW, the current is 200-220A, and the welding speed is 0.2-0.8 m/min;
the electric arc adopts a tungsten electrode, the length of the electric arc is 2-3 mm, the welding current is 100-150A, the welding speed is 0.2-0.8m/min, and the flow of argon gas is 12-18L/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710008022.6A CN106513997B (en) | 2017-01-05 | 2017-01-05 | Laser-arc hybrid welding method for myriawatt-level high-speed rail-mounted electric bottle box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710008022.6A CN106513997B (en) | 2017-01-05 | 2017-01-05 | Laser-arc hybrid welding method for myriawatt-level high-speed rail-mounted electric bottle box |
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| Publication Number | Publication Date |
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| CN106513997A CN106513997A (en) | 2017-03-22 |
| CN106513997B true CN106513997B (en) | 2020-10-27 |
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| CN201710008022.6A Active CN106513997B (en) | 2017-01-05 | 2017-01-05 | Laser-arc hybrid welding method for myriawatt-level high-speed rail-mounted electric bottle box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109352180A (en) * | 2018-12-06 | 2019-02-19 | 哈尔滨工业大学 | A kind of compound sealing method of edge joint laser-electric arc of internal pressurization |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10113471A1 (en) * | 2001-03-19 | 2002-10-02 | Highyag Lasertechnologie Gmbh | Welding materials using a laser beam used in hybrid welding processes comprises directing two laser focussing points in the welding point or in the region of the melt produced around the welding point |
| CN102310289A (en) * | 2010-06-30 | 2012-01-11 | 通用电气公司 | Hybrid laser arc welding technology and equipment |
| CN104985327A (en) * | 2015-07-27 | 2015-10-21 | 哈尔滨工业大学 | Bifocus laser and InFocus arc hybrid welding method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004001084A (en) * | 2002-03-28 | 2004-01-08 | Ishikawajima Harima Heavy Ind Co Ltd | Twin spotting laser welding method and equipment |
| JP5869972B2 (en) * | 2012-06-22 | 2016-02-24 | 株式会社神戸製鋼所 | Laser-arc combined welding method |
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2017
- 2017-01-05 CN CN201710008022.6A patent/CN106513997B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10113471A1 (en) * | 2001-03-19 | 2002-10-02 | Highyag Lasertechnologie Gmbh | Welding materials using a laser beam used in hybrid welding processes comprises directing two laser focussing points in the welding point or in the region of the melt produced around the welding point |
| CN102310289A (en) * | 2010-06-30 | 2012-01-11 | 通用电气公司 | Hybrid laser arc welding technology and equipment |
| CN104985327A (en) * | 2015-07-27 | 2015-10-21 | 哈尔滨工业大学 | Bifocus laser and InFocus arc hybrid welding method |
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| CN106513997A (en) | 2017-03-22 |
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Address after: 266000 South Head of Huiying Street, Jiaozhou Economic and Technological Development Zone, Qingdao City, Shandong Province Applicant after: Qingdao Branch Co., Ltd. of Mechanical Science Research Institute Address before: 266000 South Head of Huiying Street, Jiaozhou Economic and Technological Development Zone, Qingdao City, Shandong Province Applicant before: Qingdao Branch of General Research Institute of Mechanical Science |
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Address after: 266000 south head of Huiying street, Jiaozhou economic and Technological Development Zone, Qingdao City, Shandong Province Patentee after: China National Academy of Machinery Group Qingdao Branch Co.,Ltd. Address before: 266000 south head of Huiying street, Jiaozhou economic and Technological Development Zone, Qingdao City, Shandong Province Patentee before: Qingdao Branch Co., Ltd. of Mechanical Science Research Institute |