CN102627123B - Laser butt welding body structure suitable for box structure and welding method thereof - Google Patents
Laser butt welding body structure suitable for box structure and welding method thereof Download PDFInfo
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- CN102627123B CN102627123B CN 201210124181 CN201210124181A CN102627123B CN 102627123 B CN102627123 B CN 102627123B CN 201210124181 CN201210124181 CN 201210124181 CN 201210124181 A CN201210124181 A CN 201210124181A CN 102627123 B CN102627123 B CN 102627123B
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Abstract
The invention discloses a laser butt welding body structure suitable for a box structure and a welding method thereof, and belongs to the field of car body structure. In order to enhance the overall strength of a car body, the car body comprises an upper stamping part in steel channel shape with a downward opening, a lower stamping part in steel channel shape with a upward opening, and a box body with openings at the front and rear ends formed by butting the upper stamping part and the lower stamping part, wherein the box body is provided with a deformation-preventing component for preventing a welded seam between the upper stamping part and the lower stamping part from denting inward in welding. The welding method of the invention has a high butting precision of welded seams, can fix the position of a box component rapidly, ensure the butting precision in laser butt welding, and can enhance the strength of a beam.
Description
Technical field
The present invention relates to the automotive body structure field, specifically describe the framing structural member into auto body, as body rail structure, vehicle body floor structure etc.
Background technology
At present, laser welding is existing in the automobile body welding field to be used morely, as the welding on body side wall, top cover, door closure, floor etc.Adopt laser welding, can not only improve quality of connection, welding speed, and can improve the assembly precision of vehicle body.Laser weld joint commonly used on the vehicle body has patterns such as butt joint, overlap joint and corner connection.The most high strength steel that zinc coating is arranged that adopt of bodywork parts are to improve its resistance to corrosion.When adopting overlapped joint, the existence of zinc coating is connected to certain influence to laser beam welding, because in the welding process, zinc fume can destroy the stability in molten bath, influences welding quality.And adopting abutment joint can eliminate the influence of zinc fume, this adopts overlapped joint to be welded with remarkable advantages relatively.But adopt the welding of abutment joint pattern very high to the merging precision requirement of workpiece, this focus diameter with laser beam is relevant.The focus diameter of laser beam is generally 0.6mm, has enough laser beam energies to act on workpiece for making, guarantees when requiring the workpiece butt joint that the butt joint gap is within permissible value.In actual production, bodywork parts often adopts blanked part, and the resilience that exists after the punching press makes part produce misalignment when the butt joint welding, influence welding quality, thereby the power that need apply is corrected the part misalignment.
Summary of the invention
For the merging precision of the commissure that guarantees automotive body structure and improve the bulk strength of auto body, the present invention aims to provide a kind of body structure that is applicable to the laser butt welding of box like structure.
For achieving the above object, the technical solution used in the present invention is: a kind of body structure that is applicable to the laser butt welding of box like structure, its constructional feature is, the following blanked part that comprises the last blanked part of the channel-section steel shape that Open Side Down and the channel-section steel shape that opening makes progress, should go up the box body of the front and back end opening that blanked part and the butt joint of following blanked part form, the anti-deformation member of indent when being provided with the commissure that prevents blanked part and following blanked part in the described box body and welding.
Indent when realizing limiting the commissure welding, the left and right two ends of described anti-deformation member link to each other with the butt weld of last blanked part with following blanked part.
As a kind of concrete structure example, described anti-deformation member is preferably a plurality of cruciform construction spares, the last underarm of described a plurality of cruciform construction spares links to each other with following blanked part with last blanked part respectively, and the left and right arms of these a plurality of cruciform construction spares links to each other with the butt weld of last blanked part with following blanked part respectively.Certainly, the anti-deformation member also can be other version, and as rich character form component etc., described anti-deformation member can also be the foamed aluminium that matches with the inboard wall of cartridge shape, namely adopts foamed aluminium directly to make the member of fitting fully with box like structure part inwall.
Among the present invention, the butt joint gap of the butt weld of described last blanked part and following blanked part is less than 0.2mm, and the unfitness of butt joint of last blanked part and following blanked part is less than 0.3mm.
Further, the present invention also provides a kind of method that is applicable to the laser butt joint welding body structure of automobile box like structure, the weld seam outside of body structure that is applicable to the laser butt welding of box like structure as mentioned above is provided with fixing device, in the laser beam welding, do not apply the part of gripping power on elder generation's welded seam, withdraw fixing device then, welding does not have the weld seam part of welding again.
Below in case deformation element is example for cruciform construction spare, introduce the present invention in detail.
A kind of body structure that is applicable to the laser butt welding of box like structure, it comprises a box like structure part and several cruciform construction spares, applicable to the girder construction on the vehicle body and floor panel structure etc., the box like structure part is welded by the laser butt joint by upper and lower two parts, before the welding, cruciform construction spare is placed within the box like structure part, and the upper and lower end face of cruciform construction spare is fitted with the upper and lower two-part inside face of box like structure part respectively, is used for the location of short transverse.The left and right both ends of the surface of cruciform construction spare are fitted with the upper and lower two-part left and right inside face of box like structure part respectively, are used for the location of Width.By applying gripping power cruciform construction spare is fixed within the box like structure part then, utilizes laser that both are welded into an integral body at last.The number of described cruciform construction spare can increase and decrease according to the length of box like structure part structure, guarantees that upper and lower two-part butt joint gap and the wrong variable of box like structure part when clamping meets the demands.
The upper and lower end face of described cruciform construction spare is fitted with the upper and lower two-part inside face of box like structure part respectively, is used for the location of short transverse.The left and right both ends of the surface of described cruciform construction spare are fitted with the upper and lower two-part left and right inside face of box like structure part respectively, are used for the location of Width.
The described weld seam outside of going up blanked part and following blanked part when welding in welding process, described box like structure part is applied gripping power, the position that applies gripping power is the position of cruciform construction spare correspondence, and after guaranteeing to clamp, the upper and lower two-part butt joint gap of box like structure part is less than 0.2mm, and unfitness of butt joint is less than 0.3mm.
In laser beam welding, weld seam is the upper and lower two-part docking location of box like structure part, and sequence of welding applies the device of gripping power for welding does not earlier apply the part of gripping power about withdrawing then, will weld less than the part of welding again.
Adopt after the above-mentioned design plan, upper and lower two parts of the box like structure part of having good positioning are applied gripping power, guarantee butt joint gap and unfitness of butt joint, utilize laser that upper and lower two parts and the cruciform construction spare of box like structure part are welded into an integral body then.
Compared with prior art, the invention has the beneficial effects as follows: the merging precision height of commissure of the present invention, and the location that can finish the box like structure part rapidly, the merging precision when guaranteeing the laser butt welding, and the intensity of energy strengthened beam.
The present invention is further elaborated below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the structure principle chart of an embodiment of the present invention;
Fig. 2 is that Fig. 1 removes the constructional drawing behind the blanked part on the box like structure part;
Fig. 3 is the section drawing of anti-deformation member of the present invention and box like structure part joint place;
Fig. 4 is the position view at weld seam of the present invention place;
Fig. 5 is the scheme drawing when adopting the foamed aluminium member as the anti-deformation member;
Fig. 6 is another instance graph that the present invention uses at vehicle body.
The specific embodiment
A kind of body structure that is applicable to the laser butt welding of box like structure, as shown in Figure 1, the following blanked part 2 that comprises the last blanked part 1 of the channel-section steel shape that Open Side Down and the channel-section steel shape that opening makes progress, should go up the box body of the front and back end opening that blanked part 1 and 2 butt joints of following blanked part form, the anti-deformation member 3 of indent when being provided with weld seam 4 places that prevent blanked part 1 and following blanked part 2 in the described box body and welding.Described anti-deformation member 3 is several cruciform construction spares, and last blanked part 1, following blanked part 2 and anti-deformation member 3 three parts form an integral body by laser welding, Figure 4 shows that the position at weld seam 4 places.
Described cruciform construction spare 3 is used for blanked part 1 and following blanked part 2 two-part location and clampings on the box like structure part.Upper and lower two parts of described box like structure part are sheet stamping member, owing to there is a punching press resilience, so both can produce misalignment and gap when docking, and apply gripping power by location and the external world of cruciform construction spare, can eliminate its butt joint gap and misalignment.When the location, two end faces up and down of cruciform construction spare 3 are fitted with last blanked part 1 and the following blanked part 2 two-part inside faces of box like structure part respectively, are used for the location of short transverse; The left and right both ends of the surface of cruciform construction spare 3 are fitted with last blanked part 1 and the following blanked part 2 two-part left and right inside faces of box like structure part respectively, are used for the location of Width, as shown in Figure 3.After having good positioning, apply gripping power in the position at cruciform construction spare 3 places again, the upper and lower two-part butt joint gap of assurance box like structure part and misalignment are all within the range of permission.
In the welding process, the position that cruciform construction spare is not namely laid at the position that will not apply gripping power earlier welds.Remove fixing device then, the position of laying cruciform construction spare is welded.Because cruciform construction spare 3 left and right sides both ends of the surface and last blanked part 1 and following blanked part 2 two-part inside faces fit tightly, be equivalent to and box like structure part tie welding, therefore cruciform construction spare 3 and box like structure part can be welded as a whole.Simultaneously, cruciform construction spare 3 places within the box like structure part, has increased the intensity of total.
The content that above-described embodiment is illustrated should be understood to these embodiment and only is used for being illustrated more clearly in the present invention, limit the scope of the invention and be not used in, after having read the present invention, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
Claims (3)
1. body structure that is applicable to the laser butt welding of box like structure, it is characterized in that, comprise the last blanked part (1) of the channel-section steel shape that Open Side Down and the following blanked part (2) of the channel-section steel shape that opening makes progress, should go up the box body of the front and back end opening of blanked part (1) and following blanked part (2) butt joint composition, be provided with the anti-deformation member (3) of weld seam (4) indent when locating to weld that prevents blanked part (1) and following blanked part (2) in the described box body;
The left and right two ends of described anti-deformation member (3) link to each other with the butt weld (4) of last blanked part (1) and following blanked part (2);
Described anti-deformation member (3) is a plurality of cruciform construction spares, the last underarm of described a plurality of cruciform construction spares links to each other with following blanked part (2) with last blanked part (1) respectively, and the left and right arms of these a plurality of cruciform construction spares links to each other with the butt weld (4) of last blanked part (1) and following blanked part (2) respectively.
2. the body structure that is applicable to the laser butt welding of box like structure according to claim 1, it is characterized in that, the butt joint gap of the butt weld of last blanked part (1) and following blanked part (2) is less than 0.2mm, and the unfitness of butt joint of last blanked part (1) and following blanked part (2) is less than 0.3mm.
3. one kind is applicable to that the laser of automobile box like structure docks the method for welding body structure, it is characterized in that, to be provided with fixing device as weld seam (4) outside of the body structure of the laser butt welding that is applicable to box like structure as described in one of claim 1～2, in the laser beam welding, do not apply the part of gripping power on elder generation's welded seam (4), withdraw fixing device then, welding does not have the weld seam part of welding again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210124181 CN102627123B (en) | 2012-04-25 | 2012-04-25 | Laser butt welding body structure suitable for box structure and welding method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210124181 CN102627123B (en) | 2012-04-25 | 2012-04-25 | Laser butt welding body structure suitable for box structure and welding method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102627123A CN102627123A (en) | 2012-08-08 |
| CN102627123B true CN102627123B (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201210124181 Expired - Fee Related CN102627123B (en) | 2012-04-25 | 2012-04-25 | Laser butt welding body structure suitable for box structure and welding method thereof |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11200397A (en) * | 1998-01-10 | 1999-07-27 | Komatsu Ltd | Manufacture of box-shaped structure for construction-equipment working machine |
| JP2001246488A (en) * | 2000-03-01 | 2001-09-11 | Tokai Rika Co Ltd | Manufacturing method for container |
| JP4753259B2 (en) * | 2007-02-22 | 2011-08-24 | 株式会社日本製鋼所 | Manufacturing method of pressure vessel |
| CN101264562B (en) * | 2008-05-07 | 2010-12-08 | 湖北省博物馆 | Damaged deformation bronze ware correcting locating and repairing method |
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2012
- 2012-04-25 CN CN 201210124181 patent/CN102627123B/en not_active Expired - Fee Related
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| CN102627123A (en) | 2012-08-08 |
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Inventor after: Zhong Zhihua Inventor after: Deng Qianwang Inventor after: Zhang Yi Inventor after: Chen Genyu Inventor before: Zhang Yi Inventor before: Tan Lipeng Inventor before: Chen Genyu Inventor before: Cai Xing |
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