白车身激光焊接过程的变形预测及几何补偿方法
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摘要
针对白车身激光焊接过程中热成形钢板变形较大的问题,通过几何补偿方法消除焊接变形对装配过程的影响,建立了钢板焊接变形的几何补偿优化流程,通过基于有限元方法的焊接过程模拟来预测激光焊接的板件变形程度,并结合最优拉丁超立方采样、Kriging近似模型与粒子群优化算法对B柱加强板进行几何补偿优化.结果表明,优化后的B柱加强板经过激光焊接后与原设计型面吻合较好.
Aimed at the problem that hot-forming steel parts occur large distortion after the laser welding of body-in-white,ageometry compensation method was presented to eliminate the impact of weld-induced distortion,and the process of this method was established.The welding-induced distortion was accurately predicted based on finite element method.The geometry compensation solution of B-pillar was obtained utilizing optimal Latin hypercube method,Kriging metamodel technology and particle swarm optimization algorithm.Results show that the optimized B-pillar is in a good agreement with the ideal design after laser welding procedure.
Aimed at the problem that hot-forming steel parts occur large distortion after the laser welding of body-in-white,ageometry compensation method was presented to eliminate the impact of weld-induced distortion,and the process of this method was established.The welding-induced distortion was accurately predicted based on finite element method.The geometry compensation solution of B-pillar was obtained utilizing optimal Latin hypercube method,Kriging metamodel technology and particle swarm optimization algorithm.Results show that the optimized B-pillar is in a good agreement with the ideal design after laser welding procedure.
引文
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[2]SHANMUGAM N S,BUVANASHEKARAN G,SANKARANARAYANASAMY K,et al.Some studies on temperature profiles in AISI 304stainless steel sheet during laser beam welding using FE simulation[J].The International Journal of Advanced Manufacturing Technology,2009,43(1/2):78-94.
[3]ZAIN-UL-ABDEIN M,NELIAS D,JULLIEN J F,et al.Prediction of laser beam welding-induced distortions and residual stresses by numerical simulation for aeronautic application[J].Journal of Materials Processing Technology,2009,209(6):2907-2917.
[4]ISLAM M,BUIJK A,RAIS-ROHANI M,et al.Process parameter optimization of lap joint fillet weld based on FEM-RSM-GA integration technique[J].Advances in Engineering Software,2015,79:127-136.
[5]GOLDAK J,CHAKRAVARTI A,BIBBY M.Anew finite element model for welding heat sources[J].Metallurgical and Materials Transactions B,1984,15(2):299-305.
[6]FERRO P,ZAMBON A,BONOLLO F.Investigation of electron-beam welding in wrought Inconel706-Experimental and numerical analysis[J].Materials Science and Engineering A,2005,392(1/2):94-105.
[7]董文超,陆善平,李殿中.焊接顺序对大型薄板装甲钢结构焊接变形的影响[J].焊接学报,2015,36(7):43-46.DONG Wenchao,LU Shanping,LI Dianzhong.Effect of welding sequence on welding distortion of large-sized thin armor steel structure[J].Transactions of the China Welding Institution,2015,36(7):43-46.
[8]FAHLSTRM K,ANDERSSON O,MELANDERA,et al.Correlation between laser welding sequence and distortions for thin sheet structures[J].Science and Technology of Welding and Joining,2017,22(2):150-156.
[9]JIN R,CHEN W,SUDJIANTO A.An efficient algorithm for constructing optimal design of computer experiments[J].Journal of Statistical Planning and Inference,2005,134(1):268-287.
[10]HOLLAND J H.Adaptation in natural and artificial system:An introduction with application to biology,control and artificial intelligence[M].Ann Arbor,USA:University of Michigan Press,1975.