CN102151988A - Traceless laser correction method for back deformation of stainless steel plate subjected to non-penetration laser welding - Google Patents
Traceless laser correction method for back deformation of stainless steel plate subjected to non-penetration laser welding Download PDFInfo
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- CN102151988A CN102151988A CN2011100372316A CN201110037231A CN102151988A CN 102151988 A CN102151988 A CN 102151988A CN 2011100372316 A CN2011100372316 A CN 2011100372316A CN 201110037231 A CN201110037231 A CN 201110037231A CN 102151988 A CN102151988 A CN 102151988A
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Abstract
The invention discloses a traceless laser correction method for back deformation of a stainless steel plate subjected to non-penetration laser welding and belongs to the technical field of laser heat treatment. Abrasive machining is performed on the back of an external plate before or after non-penetration laser welding in the prior art to form surface wire drawing lines, so the deformation of the back of the external plate can be covered visually; by the prior art, the deformation cannot be corrected sensibly; the wire drawing lines cannot cover the welding deformation in different directions; the covering and the welding deformation in the same direction only become unclear visually. In the traceless laser correction method, laser is used as a heat source to movably heat a deformed region of the back of the external plate of a stainless steel railway vehicle body along the direction of a welding line; meanwhile, a protective gas is blown into the heated region; the mobile heating time is greater than or equal to one; and the moving direction of the heat source for each time of heating is the same. By the traceless laser correction method, traceless correction for the back deformation of the stainless steel plate of the railway vehicle subjected to non-penetration laser welding can be realized.
Description
Technical field
The present invention relates to the non-penetration laser weld of a kind of corrosion resistant plate back part and be out of shape seamless laser antidote, be used for the seamless rectification of the non-penetration laser weld of trolley coach car body corrosion resistant plate back part distortion, belong to the laser heat treatment technology field.
Background technology
City underground, light rail and railway traffic use a large amount of trolley coach, and the stainless steel car body of trolley coach is compared with ordinary steel car body or aluminum alloy bodywork, have economy and durability, attractive in appearance, safety, outer surface and need not advantages such as application, and demand is increasing.The SUS301L or the SUS304 cold rolled stainless steel sheet of stainless steel car body outside plate board selection surface aesthetic, wherein the SUS301L consumption accounts for 70%.Prior art adopts non-penetration laser welding method to realize engaging of outside plate and outside plate reinforcement.Though described method for laser welding can guarantee the sealing of the bonding strength and the weld seam of joint, and speed of welding is also very high,, the phenomenon of back distortion can appear in welding back outside plate, and described outside plate back is exactly the stainless steel car body surface, and therefore, described deformation effect car body is attractive in appearance.In order to address this problem, the patent that the name of Kawasaki, Japan heavy industry Co., Ltd. application is called " method for laser welding, laser weld joint, outer plate panel and rolling stock body structure " (application number 200580015809.0) provides a kind of scheme.This scheme before non-penetration laser weld or afterwards outside backboard portion implement attrition process, form surperficial drawing pattern, visually cover the distortion at outside plate back.Yet this method is corrected distortion in sense of touch, and described drawing pattern is failed to cover with it and moved towards different welding deformations, and what is called has been covered and moved towards identical welding deformation with it and make visually just that also this distortion becomes so unobvious.
Summary of the invention
The objective of the invention is to correct trolley coach stainless steel car body outside plate and realize outside plate and the outside plate back distortion that takes place being connected of outside plate reinforcement, recover the surface aesthetic of outside plate sheet material because of adopting non-penetration laser welding method.For this reason, our the non-penetration laser weld of a kind of corrosion resistant plate back part that proposes the present invention is out of shape seamless laser antidote.
The present invention is characterized in that; see Fig. 1, shown in Figure 2; with laser is thermal source; along weld seam 1 direction trolley coach stainless steel car body outside plate 2 back deformed regions 3 are moved heating; simultaneously be blown into protective gas to being heated the zone; move the heating number of times more than or equal to once, to heat the thermal source moving direction identical at every turn.
Its technique effect of the present invention is, the straightening thermal source that is adopted is identical with the welding heat source kind, promptly be all laser, but, the heating region position opposite, the weld heating zone is positioned at the side that outside plate reinforcement 4 and outside plate 2 contact with outside plate reinforcement 4, see shown in Figure 1, and the straightening heating region is positioned at the opposite side of outside plate 2, be outside plate 2 backs, therefore, laser straightening heating can make outside plate 2 be heated the zone take place with because of the opposite distortion of the distortion that weld heating took place, realize the rectification that the non-penetration laser weld of corrosion resistant plate back part is out of shape.Compare with the distortion that prior art is visually covered the outside plate back by attrition process; the present invention is the vestige of backboard portion increase outside not; and; the energy of the laser thermal source output of being adopted that adds heat straightening can accurate be controlled, and simultaneously, adopts protective gas protection heating region; avoid the variable color of outside plate back surfaces occurring because of oxidation; therefore, the present invention has realized the seamless rectification of the non-penetration laser weld of corrosion resistant plate back part distortion, recovers the smooth of outside plate back.
Description of drawings
Fig. 1 is that the present invention's method master looks schematic diagram, and this figure double as is a Figure of abstract.Fig. 2 is that schematic diagram is looked on the present invention's a method left side.
The specific embodiment
Its specific embodiment of the present invention is as follows, adopts organic solvent such as acetone to trolley coach stainless steel car body outside plate 2 back deformed regions 3 are cleaned, to remove surface and oil contaminant.Outside plate 2 is SUS301L or SUS304 cold rolled stainless steel sheet with outside plate reinforcement 4 sheet materials.Seeing Fig. 1, shown in Figure 2, is thermal source with laser, and described laser is YAG laser, CO
2Laser, optical-fiber laser, semiconductor laser a kind of, pattern is basic mode or accurate basic mode.Along weld seam 1 direction trolley coach stainless steel car body outside plate 2 back deformed regions 3 are moved heating.Simultaneously be blown into protective gas to being heated the zone, described protective gas is He, Ar, N
2, CO
2A kind of.Protective gas is blown into after LASER HEATING; Protective gas is restrainted parallel by 3～7 and is formed along the air-flow of LASER HEATING moving direction word order; Protective gas is blown into direction and the LASER HEATING moving direction is 55～70 ° of angle theta
1, protective gas is blown into direction and outside plate 2 back surfaces are 65～90 ° of angle theta
2Shield gas flow rate is 20～50L/min.Move the heating number of times more than or equal to once, to heat the thermal source moving direction identical at every turn.
Basic mode or accurate basic mode laser energy density are higher, thereby can avoid heated perimeter to exceed deformed region 3 when realizing correcting distortion, cause new distortion; Because the thermograde of basic mode or accurate basic mode laser facula is bigger, can makes outside plate 2 be heated scope and form the needed stress of rectification distortion simultaneously.
Embodiment one:
Adopt acetone to trolley coach stainless steel car body outside plate 2 back deformed regions 3 are cleaned, to remove surface and oil contaminant.Outside plate 2 is the SUS301L cold rolled stainless steel sheet with outside plate reinforcement 4 sheet materials, outside plate 2 thick 1.5mm, outside plate reinforcement 4 thick 0.8mm, fusion penetration 1.0mm.See Fig. 1, shown in Figure 2, with accurate basic mode CO
2Laser is thermal source, laser power 80W, defocusing amount+4mm.Along weld seam 1 direction trolley coach stainless steel car body outside plate 2 back deformed regions 3 are moved heating, translational speed 0.5m/min.Simultaneously be blown into protective gas N to being heated the zone
2Protective gas is blown into after LASER HEATING; Protective gas is restrainted parallel by 4 and is formed along the air-flow of LASER HEATING moving direction word order; Protective gas is blown into direction and the LASER HEATING moving direction is 60 ° of angle theta
1, protective gas is blown into direction and outside plate 2 back surfaces are 80 ° of angle theta
2Shield gas flow rate is 40L/min.Move heating 2 times, to heat the thermal source moving direction identical at every turn.
Embodiment two:
Adopt acetone to trolley coach stainless steel car body outside plate 2 back deformed regions 3 are cleaned, to remove surface and oil contaminant.Outside plate 2 is the SUS304 cold rolled stainless steel sheet with outside plate reinforcement 4 sheet materials, outside plate 2 thick 2.0mm, outside plate reinforcement 4 thick 1.0mm, fusion penetration 1.2mm.Seeing Fig. 1, shown in Figure 2, is thermal source with basic mode YAG laser, laser power 100W, defocusing amount+2mm.Along weld seam 1 direction trolley coach stainless steel car body outside plate 2 back deformed regions 3 are moved heating, translational speed 0.3m/min.Simultaneously be blown into protective gas Ar to being heated the zone.Protective gas is blown into after LASER HEATING; Protective gas is restrainted parallel by 5 and is formed along the air-flow of LASER HEATING moving direction word order; Protective gas is blown into direction and the LASER HEATING moving direction is 75 ° of angle theta
1, protective gas is blown into direction and outside plate 2 back surfaces are 70 ° of angle theta
2Shield gas flow rate is 35L/min.Move heating 3 times, to heat the thermal source moving direction identical at every turn.
Claims (4)
1. the non-penetration laser weld of a corrosion resistant plate back part is out of shape seamless laser antidote; it is characterized in that; with laser is thermal source; along weld seam (1) direction trolley coach stainless steel car body outside plate (2) back deformed region (3) is moved heating; simultaneously be blown into protective gas to being heated the zone; move the heating number of times more than or equal to once, to heat the thermal source moving direction identical at every turn.
2. seamless laser antidote according to claim 1 is characterized in that, outside plate (2) sheet material is SUS301L or SUS304 cold rolled stainless steel sheet.
3. seamless laser antidote according to claim 1 is characterized in that described laser is YAG laser, CO
2Laser, optical-fiber laser, semiconductor laser a kind of, pattern is basic mode or accurate basic mode.
4. seamless laser antidote according to claim 1 is characterized in that described protective gas is He, Ar, N
2, CO
2A kind of; Protective gas is restrainted parallel by 3～7 and is formed along the air-flow of LASER HEATING moving direction word order; Protective gas is blown into direction and the LASER HEATING moving direction is 55～70 ° of angle theta
1, protective gas is blown into direction and outside plate 2 back surfaces are 65～90 ° of angle theta
2Shield gas flow rate is 20～50L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100372316A CN102151988A (en) | 2011-02-14 | 2011-02-14 | Traceless laser correction method for back deformation of stainless steel plate subjected to non-penetration laser welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100372316A CN102151988A (en) | 2011-02-14 | 2011-02-14 | Traceless laser correction method for back deformation of stainless steel plate subjected to non-penetration laser welding |
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| CN102151988A true CN102151988A (en) | 2011-08-17 |
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| CN2011100372316A Pending CN102151988A (en) | 2011-02-14 | 2011-02-14 | Traceless laser correction method for back deformation of stainless steel plate subjected to non-penetration laser welding |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104002044A (en) * | 2014-06-03 | 2014-08-27 | 湖南大学 | Non-penetration laser welding apparatus and non-penetration laser welding method |
| CN106573335A (en) * | 2014-07-17 | 2017-04-19 | 西门子能源有限公司 | Laser correction of metal deformation |
| CN108296636A (en) * | 2018-01-18 | 2018-07-20 | 上海业识科技有限公司 | The seamless no color differnece welding procedure of surface stainless steel plate surface based on pulse laser |
| CN108311787A (en) * | 2018-01-18 | 2018-07-24 | 上海业识科技有限公司 | Stainless steel faceplate surface soldered technique based on continuous laser, quasi-continuous lasing |
| CN112008273A (en) * | 2020-07-09 | 2020-12-01 | 中船第九设计研究院工程有限公司 | Ship T-shaped section welding deformation correction method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104002044A (en) * | 2014-06-03 | 2014-08-27 | 湖南大学 | Non-penetration laser welding apparatus and non-penetration laser welding method |
| CN104002044B (en) * | 2014-06-03 | 2015-10-28 | 湖南大学 | A kind of non-penetration laser welding equipment carries out the method for welding |
| CN106573335A (en) * | 2014-07-17 | 2017-04-19 | 西门子能源有限公司 | Laser correction of metal deformation |
| CN108296636A (en) * | 2018-01-18 | 2018-07-20 | 上海业识科技有限公司 | The seamless no color differnece welding procedure of surface stainless steel plate surface based on pulse laser |
| CN108311787A (en) * | 2018-01-18 | 2018-07-24 | 上海业识科技有限公司 | Stainless steel faceplate surface soldered technique based on continuous laser, quasi-continuous lasing |
| CN108296636B (en) * | 2018-01-18 | 2019-09-24 | 上海业识科技有限公司 | The seamless no color differnece welding procedure of surface stainless steel plate surface based on pulse laser |
| CN112008273A (en) * | 2020-07-09 | 2020-12-01 | 中船第九设计研究院工程有限公司 | Ship T-shaped section welding deformation correction method |
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Application publication date: 20110817 |