The Model for the Spring-back Variation of Lap Welding Joint of Auto Body Flexible Sheet
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摘要: 当前汽车车身薄板件点焊回弹模型采用薄板端部的点接触模型,未考虑实际点焊工艺中设置的搭边量,因此不适用于实际装配质量分析.通过对柔性薄板定位装配过程的研究及实际点焊生产工艺的分析,建立了面接触搭边悬臂梁结构,并在对焊接接头受力分析的基础上提出了一种考虑搭边量的点焊回弹偏差数学模型,后与无搭边回弹偏差模型作参数敏感性对比分析.最后,通过分析矩形薄板件实例的装配偏差,表明了该偏差分析模型的有效性.Abstract: The current spring-back variation model for spot welding of auto body flexible sheet,in which the points contact at the edge of sheet does not consider the lap width set in the spot welding production,therefore it does not apply to the analysis of assembly quality. In this paper,a cantilever structure with surface contacting is firstly established by analyzing the locating and assembly process of the flexible sheet and the spot welding process. Then,a model for the spring-back variation of lap welding joint considering lap width is presented based on the analysis of welding joint force. The sensitivity of parameters is verified by comparing the traditional spring-back variation model without lap width. Finally,a case of rectangular sheet metal assembly was used to reveal the effectiveness of the assembly variation model.
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Key words:
- ABAQUS /
- assembly /
- auto body flexible sheet /
- automobile bodies
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[1] LiuSC,Hu S J, Woo T C. Tolerance analysis for metalassemblies [J]. Journal of Mechanical Design,1996,118(3)}62-67 [2] 吴兴敏,王立刚汽车车身构造[M]北京:人民邮电出版社,2010Wu X M,Wang L G. The structaure of automobilebody [M]Beijing;People's Posts and TeleconmmnicationsPress,2010 (in Chinese) [3] Liu S C,Hu S J. Variation simulation for deformablesheet metal assemblies using finite element methods[J[Journal of Manufactauring Seience and Engineering,1997,119 (3);368-374 [4] 胡敏,来新民,林忠钦,等多柔性件并联点焊装配误差的数学模型[J]上海交通大学报,2001,35(1);139-143Hu M,Lai X M,Lin Z Q,et al. Mathematic model ofmulti-flexible parts spot welding assembly variation inparallel[J]Journal of Shanghai Jiaotong University,2001,35(1):139-143(in Chinese) [5] Dahlstrom S, Lindkvist L. Variation simulation of sheetmetal assemblies using the method of influence coellicientswith c:ontaca modeling[J]Journal of ManufactauringScience and Engineering,2007,129(3);615-622 [6] Camelio J A, Hu S J, Marin S P. Compliant assemblyvariation analysis using component geometric: covariance [J]Journal of Manufactauring Science and Engineering,2004,126(2):355-36 [7] 0CaiW,Wang P C, Yang WAssembly dimensionalpredication for self-piercing riveted aluminum panels[J]International Journal of Machine Tools and Manufactaure,2005,45(6);695-704 [8] 宋晓琳汽车车身制造工艺学[M]北京:北京理工大学出版社,2006Song X L. Automobile bomanufactauring engineering } M]Beijing;Beijing Institute of Technology Press,2006(in Chinese) [9] 张圣勤MATLAB7.0实用教程[M]北京:机械工业出版,Zhang S Q. MATLAB7. 0 practaical tutorials[M]Beijing:China Machine Press,2006(in Chinese) [10] 庄茁,由小川基于ABAQUS的有限元分析和应用[M]北京:清华大学出版社,2009Zhuang Z, You X C. Finite element analysis and applicationbased on ABAQUS[M]Beijing; Tsinghua UniversityPress,2009(in Chinese)
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