CN101169642A - Differential thickness high intensity steel laser tailor-welded blanks curved welding line arrangement and forming method - Google Patents
Differential thickness high intensity steel laser tailor-welded blanks curved welding line arrangement and forming method Download PDFInfo
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- CN101169642A CN101169642A CNA2007101905453A CN200710190545A CN101169642A CN 101169642 A CN101169642 A CN 101169642A CN A2007101905453 A CNA2007101905453 A CN A2007101905453A CN 200710190545 A CN200710190545 A CN 200710190545A CN 101169642 A CN101169642 A CN 101169642A
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Abstract
The invention relates to the laser welding plate forming research field, and is mainly applied to such occasion as layout and forming of different thickness high-strength steel laser welding board curved welding seams. The invention is provided with a curved welding seam which has different forms for a laser welding board, thereby getting reasonable seam layout through the welding seam moving an analytical model and the accurate modeling approach thereof, and improving the forming performance of the welding board; wherein, the flow of materials is improved and the layout and the good forming of different thickness high-strength steel plate laser welding board curved welding seam are achieved based on the variable blank-holder force, variable stamping speed, clamping in weld, designing cope hole with welding thick base metal, and other advanced forming technologies. By the method, the layout of the welding board curved welding seam is optimized, thereby increasing the forming performance of a curved welding seam welding board, and widely using.
Description
Technical field
The invention belongs to welding plate stamping and forming field, refer in particular to a kind of curved welding seam of differential thickness high intensity steel laser welding plate and arrange and manufacturing process, be mainly used in and adopt curved welding seam differential thickness high intensity steel laser welding plate to manufacture and design the occasion of body outer skin.Curved welding seam can adapt to the characteristics of body outer skin part large scale, complex space curved surface better.Adopt this method can realize the weld seam layout of differential thickness high intensity steel laser welding plate, increase the dirigibility that curved welding seam is arranged, improve the forming property of welding plate, the assurance forming quality.
Background technology
The welding plate is meant two or more than two slab welded together and carries out punching press to satisfy the requirements such as performance thickness of vehicle body different parts part.These plates can be identical, also can have different thickness, mechanical property and plating type.The welding plate stamping and forming has overcome the shortcoming of traditional separating shaped method and integral forming method simultaneously.Differential thickness high intensity steel laser tailor-welded blanks curved welding line layout and manufacturing process are studied, can be instructed for its application in the vehicle body manufacturing provide theory and technology.
The influence to weight saving of different weld shapes and position has been studied by Thyssen Krupp, under the situation that satisfies the design of part requirement, by different weld seam arrangement forms, can design multiple door-plate reaching the purpose of plate weight saving, not arrange the result that influences the sheet forming performance but specify different weld seams.
Klaus Siegert carries out real dashing when testing at the welding plate to three different-thickness combinations and has arranged different position while welding (Fig. 1), and a weld seam is a straight bead, and one is oblique line weld seam (having angle with material flow direction).Forming process has illustrated that the oblique line weld seam partly is the sheet forming critical area, and along with the difference of these two kinds of position while weldings, the difference of tailor welded blank forming performance is also bigger.The author points out in follow-up research that rational weld seam is arranged and can optimize weld movement, and proposed curved welding seam and can restrain weld movement, but he does not make a concrete analysis of.
The high test of Ghassan T.Kridli limit of utilization vault, (Fig. 2: weld seam and center line are at 45 to have studied the weld seam of three kinds of diverse locations, cross weld at center line, approach the cross weld that lateral deviation is moved from the center alignment) to aluminium alloy tailor welded blank forming Effect on Performance, the result shows that position while welding has very big influence to forming property: the forming property of 45 ° of weld seams is better than other two kinds of weld seams and arranges.The author here studies the oblique line weld seam, but the oblique line weld seam of diverse location is not carried out concrete research.
Above-mentioned research relates generally to different position while weldings to the tailor welded blank forming Effect on Performance, the layout and the shaping of curved welding seam is not specifically studied.Curved welding seam is arranged more flexible, alleviating plate weight, improving on the tailor welded blank forming performance and have more advantage, adopt suitable curved welding seam to arrange the weld movement amount that can reduce in the punching course simultaneously, therefore be necessary to introduce curved welding seam in the welding plate, the present invention produces under this background.
Summary of the invention
The present invention mainly arranges multi-form curved welding seam and manufacturing process is provided high intensity steel laser welding plate, to improve the dirigibility of body outer skin design under the prerequisite that guarantees forming quality.The present invention uses the weld movement analytic model and the accurate modeling method of weld seam realizes differential thickness high intensity steel laser welding plate curved welding seam layout and good the shaping; The present invention adopts pressure variable edge force, becomes advanced forming techniques such as drawing velocity, weld seam clamping column and forming technology hole, control the weld movement amount, material flows when improving tailor welded blank forming, realize the curved welding seam layout of differential thickness high intensity steel laser welding plate, obtain good forming effect.
The concrete arrangement of curved welding seam is versatile and flexible, and the present invention adopts curved welding seam and has the arrangement (Fig. 3) that certain angle changes, and arranges with the body outer skin weld seam in the practical application to conform to.Weld movement has bigger influence to the forming property of welding plate, and the foundation that curved welding seam is arranged is: (1). obtain less weld movement amount as far as possible; (2). the tailor welded blank forming quality is good.
1. weld movement analytic model prediction and calculation weld movement amount (Fig. 4).
The thickness of differential thickness high intensity steel laser welding plate is respectively t
AAnd t
B(t
A＜t
B), F
1And F
2Expression acts on 1 and 2 two external force on the direction.The oblique line section weld seam of the curved welding seam of arranging can be with the point on the weld seam to plate center line M
1M
2Represent apart from d, represent that with s spot projection on the weld seam is to M
1M
2The back is to plate center line N
1N
2Distance (Fig. 4 b), can approach the weld movement amount of side mother metal:
ε wherein
1 AThe thin strain size of side mother metal on 1 direction of expression, β
AThe ratio of the thin side mother metal strain on strain on 2 directions and 1 direction of expression.
The curved welding seam of arranging and plate center line have certain angular relationship, under the certain situation of material parameter, the weld movement amount is relevant with angle θ, increases little trend along with the increase weld movement of weld seam angle presents.
2. use the accurate modeling method of weld seam the welding plate is carried out finite element analysis.
Adopt shell unit, weld seam to adopt body unit that the welding plate is carried out accurate modeling by using the Abaqus finite element software to mother metal, improve the finite element analysis precision, improve forming quality.
3. at curved welding seam differential thickness high intensity steel laser welding plate, adopt different stamping technology and auxiliary process, realize the curved welding seam part forming.
(1) for curved welding seam differential thickness high intensity steel laser welding plate, adopt linear pressure variable edge force (Fig. 5) or linear decrescence change drawing velocity technology (Fig. 6) decrescence to reduce thin side material strain and concentrate respectively, reduce the weld movement amount, improve forming property, realize the curved welding seam part forming.
(2) at curved welding seam differential thickness high intensity steel laser welding plate, adopt linear pressure variable edge force decrescence and linear change drawing velocity technology decrescence simultaneously, realize the curved welding seam part forming.
(3) at curved welding seam differential thickness high intensity steel laser welding plate, adopt clamping column and design circular fabrication hole (Fig. 7) at thick side mother metal at thick side mother metal, to increase flowing of thickened sides material, make thick side plate material distortion more abundant, the distortion of curved welding seam differential thickness high intensity steel laser welding plate is more even.
For the high intensity steel laser tailor welded blank forming of different curved welding seams, along with the increase of weld seam angle, the weld movement amount presents the trend that reduces; Along with the increase of layout angle, the deformation extent of thin side mother metal welded seam area is weakening, and it is safer to be shaped, and determines that finally the weld seam layout of angle in 120 ° to 150 ° scopes can obtain to weld preferably the shaping of plate.
Advantage of the present invention:
The present invention mainly is by weld movement analytic model and the accurate modeling method of weld seam, realizes the layout of curved welding seam, guarantees that curved welding seam differential thickness high intensity steel laser welding plate has good forming property.
The present invention introduces pressure variable edge force, becomes drawing velocity, adopts advanced forming techniques such as weld seam clamping column, fabrication hole at differential thickness high intensity steel laser welding plate, realizes that the curved welding seam of differential thickness high intensity steel laser welding plate is arranged.
Description of drawings
Fig. 1 Klaus Siegert is real to be arranged towards pilot seam
The high pilot seam of Fig. 2 Ghassan T.Kridli limit vault is arranged
Fig. 2 (a) weld seam and center line are at 45
Fig. 2 (b) is at the cross weld of center line
The cross weld that Fig. 2 (c) moves from the thin lateral deviation of center alignment
Fig. 3 curved welding seam arrangement
Fig. 4 weld movement analytic model
Fig. 4 (a) three-dimensional model Fig. 4 (b) three-dimensional model vertical view
Fig. 5 linearity pressure variable edge force loading technique decrescence
Fig. 6 linearity change drawing velocity loading technique decrescence
Fig. 7 weld seam clamping column and fabrication hole synoptic diagram
Among the figure: 1. vertical weld 2. oblique line weld seams 3. material flow direction 4. approach blank holder 9. curved welding seams 10. oblique line section weld seams 11. clamping columns 12. fabrication holes of the punch 8. Φ 132.6mm of side mother metal 5. thick side mother metal 6. cross welds 7. Φ 101.6mm
Embodiment
The present invention as research object, uses weld movement analytic model and the accurate modeling method of weld seam with the used laser assembly solder plate of body outer skin, realizes that the curved welding seam of differential thickness high intensity steel laser welding plate is arranged and good the shaping; Realize the curved welding seam layout and the good shaping of differential thickness high intensity steel laser welding plate based on advanced forming techniques such as pressure variable edge force, change drawing velocity, employing weld seam clamping column, forming technology holes.
(1) curved welding seam arranges with Fig. 3 to be example, according to weld movement analytic model prediction and calculation curved welding seam amount of movement.
The thickness of differential thickness high intensity steel laser welding plate is respectively t
AAnd t
B(t
A＜t
B), F
1And F
2Expression acts on 1 and 2 two external force on the direction.The oblique line section weld seam of the curved welding seam of arranging can be with the point on the weld seam to plate center line M
1M
2Represent apart from d, represent that with s spot projection on the weld seam is to M
1M
2The back is to plate center line N
1N
2Distance (Fig. 4 b), can approach the weld movement amount of side mother metal:
ε wherein
1 AThe thin strain size of side mother metal on 1 direction of expression, β
AThe ratio of the thin side mother metal strain on strain on 2 directions and 1 direction of expression.
(2) use the Abaques finite element analysis software welding plate welding seams is carried out accurate modeling, arrange the forming property that the change of shape obtains welding plate by weld seam.
Adopt shell unit, weld seam to adopt body unit that the welding plate is carried out accurate modeling to mother metal, improve the finite element analysis precision, improve forming quality.
At curved welding seam differential thickness high intensity steel laser welding plate, embodiment adopts different stamping technologies and auxiliary process, realizes the curved welding seam part forming:
Embodiment 1: to adopting the step blank holder to load with punch travel linearity pressure variable edge force (see figure 5) decrescence respectively in the curved welding seam differential thickness high intensity steel welding plate punching course, or adopt the linear change drawing velocity technology (Fig. 6) decrescence can moving direction and the size of control panel materials flow, guarantee that curved welding seam differential thickness high intensity steel laser welding plate has obtained forming property preferably.
Embodiment 2: adopt linear pressure variable edge force and linearity change drawing velocity technology decrescence decrescence simultaneously, and these two kinds of technology are carried out coordination optimization, improve the forming property of curved welding seam differential thickness high intensity steel laser welding plate.
Embodiment 3: control weld movement at thick side mother metal near commissure 5 clamping columns of design, and be the fabrication hole (Fig. 7) of 100mm near commissure design circular radius at thick side mother metal, increase flowing of thickened sides material, make that thick side plate material distortion is more abundant, realize that differential thickness high intensity steel laser welding plate has obtained forming property preferably.
Difform curved welding seam differential thickness high intensity steel laser welding plate, the weld seam in 120 ° to 150 ° scopes is arranged can obtain forming property preferably.If the curved welding seam differential thickness high intensity steel laser tailor welded blank forming poor-performing of being arranged maybe can't be shaped, can adopt pressure variable edge force, become drawing velocity, adopt advanced forming techniques such as weld seam clamping column, forming technology hole to realize being shaped.
Claims (4)
1. a differential thickness high intensity steel laser tailor-welded blanks curved welding line is arranged and manufacturing process, it is characterized in that may further comprise the steps:
(1) weld movement analytic model prediction and calculation weld movement amount
The thickness of differential thickness high intensity steel laser welding plate is respectively t
AAnd t
B(t
A＜t
B), F
1And F
2Expression acts on 1 and 2 two external force on the direction; The oblique line section weld seam of the curved welding seam of arranging can be with the point on the weld seam to plate center line M
1M
2Represent apart from d, represent that with s spot projection on the weld seam is to M
1M
2The back is to plate center line N
1N
2Distance, must approach the weld movement amount of side mother metal:
ε wherein
1 AThe thin strain size of side mother metal on 1 direction of expression, β
AThe ratio of the thin side mother metal strain on strain on 2 directions and 1 direction of expression;
(2) use the accurate modeling method of weld seam the welding plate is carried out finite element analysis
Using the Abaqus finite element software adopts shell unit, weld seam to adopt body unit that the welding plate is carried out accurate modeling to mother metal;
(3) at curved welding seam differential thickness high intensity steel laser welding plate, adopt different stamping technology and auxiliary process, realize the curved welding seam part forming.
2. differential thickness high intensity steel laser tailor-welded blanks curved welding line according to claim 1 is arranged and manufacturing process, it is characterized in that adopting respectively linear pressure variable edge force or linearity change drawing velocity technology decrescence decrescence, realizes the curved welding seam part forming.
3. differential thickness high intensity steel laser tailor-welded blanks curved welding line according to claim 1 is arranged and manufacturing process, it is characterized in that adopting simultaneously linear pressure variable edge force decrescence and linear change drawing velocity technology decrescence, realizes the curved welding seam part forming.
4. differential thickness high intensity steel laser tailor-welded blanks curved welding line according to claim 1 is arranged and manufacturing process, it is characterized in that described auxiliary process makes thick side plate material distortion more abundant for adopting clamping column at thick side mother metal and designing circular fabrication hole at thick side mother metal, realizes the curved welding seam part forming.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101905453A CN100507776C (en) | 2007-11-30 | 2007-11-30 | Differential thickness high intensity steel laser tailor-welded blanks curved welding line arrangement and forming method |
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| CNB2007101905453A CN100507776C (en) | 2007-11-30 | 2007-11-30 | Differential thickness high intensity steel laser tailor-welded blanks curved welding line arrangement and forming method |
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| CN101169642A true CN101169642A (en) | 2008-04-30 |
| CN100507776C CN100507776C (en) | 2009-07-01 |
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Cited By (8)
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| CN102950185A (en) * | 2012-11-16 | 2013-03-06 | 华中科技大学 | Variable speed and variable blank holder force linked sheet drawing process |
| CN103291194A (en) * | 2012-03-02 | 2013-09-11 | 铃木株式会社 | Door inner panel as automobile parts and method of manufacturing same |
| CN103752651A (en) * | 2014-01-09 | 2014-04-30 | 上海飞机制造有限公司 | Laser shock shape-correcting method for welded integral panels |
| CN105188978A (en) * | 2013-02-08 | 2015-12-23 | 杰富意钢铁株式会社 | Press-forming analysis method |
| CN106054666A (en) * | 2016-05-30 | 2016-10-26 | 湖南大学 | Car covering piece welding line back calculation method |
| CN107614139A (en) * | 2015-05-22 | 2018-01-19 | 新日铁住金株式会社 | Compressing product and its design method |
| CN109967588A (en) * | 2019-04-12 | 2019-07-05 | 北京卫星制造厂有限公司 | A kind of thick welding sheet hydroforming method of aluminium alloy difference |
| CN115255704A (en) * | 2022-06-13 | 2022-11-01 | 中国第一汽车股份有限公司 | Process optimization method for crack of tailor-welded joint of tailor-welded blank stamped parts with different thicknesses |
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- 2007-11-30 CN CNB2007101905453A patent/CN100507776C/en not_active Expired - Fee Related
Cited By (16)
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| CN103291194A (en) * | 2012-03-02 | 2013-09-11 | 铃木株式会社 | Door inner panel as automobile parts and method of manufacturing same |
| CN103291194B (en) * | 2012-03-02 | 2015-06-17 | 铃木株式会社 | Door inner panel as automobile parts and method of manufacturing same |
| CN102950185A (en) * | 2012-11-16 | 2013-03-06 | 华中科技大学 | Variable speed and variable blank holder force linked sheet drawing process |
| CN102950185B (en) * | 2012-11-16 | 2014-10-29 | 华中科技大学 | Variable speed and variable blank holder force linked sheet drawing process |
| CN105188978A (en) * | 2013-02-08 | 2015-12-23 | 杰富意钢铁株式会社 | Press-forming analysis method |
| US10161892B2 (en) | 2013-02-08 | 2018-12-25 | Jfe Steel Corporation | Method of analyzing press forming |
| CN105188978B (en) * | 2013-02-08 | 2017-03-29 | 杰富意钢铁株式会社 | Punch forming analytic method |
| CN103752651A (en) * | 2014-01-09 | 2014-04-30 | 上海飞机制造有限公司 | Laser shock shape-correcting method for welded integral panels |
| CN107614139A (en) * | 2015-05-22 | 2018-01-19 | 新日铁住金株式会社 | Compressing product and its design method |
| CN107614139B (en) * | 2015-05-22 | 2019-05-10 | 新日铁住金株式会社 | Compression moulding product and its design method |
| CN106054666A (en) * | 2016-05-30 | 2016-10-26 | 湖南大学 | Car covering piece welding line back calculation method |
| CN106054666B (en) * | 2016-05-30 | 2019-02-22 | 湖南大学 | A kind of automobile panel weld seam anti-calculate method |
| CN109967588A (en) * | 2019-04-12 | 2019-07-05 | 北京卫星制造厂有限公司 | A kind of thick welding sheet hydroforming method of aluminium alloy difference |
| CN109967588B (en) * | 2019-04-12 | 2020-07-14 | 北京卫星制造厂有限公司 | Liquid filling forming method for aluminum alloy differential thickness tailor-welded blank |
| CN115255704A (en) * | 2022-06-13 | 2022-11-01 | 中国第一汽车股份有限公司 | Process optimization method for crack of tailor-welded joint of tailor-welded blank stamped parts with different thicknesses |
| CN115255704B (en) * | 2022-06-13 | 2024-06-11 | 中国第一汽车股份有限公司 | Process optimization method for split joint of unequal-thickness split-welded plate stamping part |
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Assignee: Jiangsu Youbang Precision Industries Co., Ltd. Assignor: Jiangsu University Contract record no.: 2010320000786 Denomination of invention: Differential thickness high intensity steel laser tailor-welded blanks curved welding line arrangement and forming method Granted publication date: 20090701 License type: Exclusive License Open date: 20080430 Record date: 20100623 |
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Granted publication date: 20090701 Termination date: 20131130 |