摘要
目的研究白车身顶盖与侧围激光钎焊装配尺寸控制方法,提高顶盖侧围激光钎焊焊缝装配精度,降低激光焊缺陷率。方法顶盖与侧围焊接配合形面由传统的面贴合设计更改为线贴合,降低对车身焊接合拼精度的要求;顶盖与侧围模具结构上采用整体整形及压料镶块提升零件的尺寸精度,避免因镶块交接造成的翻边面缺陷而影响激光钎焊质量;顶盖与侧围的成形焊夹具设计成y向浮动以及在激光焊夹具上设计z向夹紧功能,来实现侧围与顶盖装配间隙的调整。结果实际应用表明,侧围与顶盖激光钎焊装配尺寸得到了有效控制,满足激光钎焊的要求。结论顶盖与侧围产品的设计优化、冲压模具工艺和结构的创新和优化以及焊装焊接夹具的柔性化适配功能,可以有效保证白车身顶盖钎焊搭接部位尺寸精度。
The paper aims to research control methods for dimensional accuracy of laser beam braze welding for BIW roof and side panel to improve the assembly joint dimensional accuracy of side panel and roof for laser beam braze welding (LBBW) and decrease the defects of LBBW. First, the match mode of side panel and roof at the assembly joint was changed from surface match to line match to decrease the requirement on the welding assembly accuracy of body. Second, the integral restrike and pressing insert block were introduced to increase the dimensional accuracy of the parts to avoid the flange defect at the joint area of the inserts from affecting the LBBW quality. Thirdly, the y floating fixture and special z clamps were used at the roof forming station and the LBBW station to adjust the assembly clearance between side panel and roof. The practical application indicated that the assembly joint dimensional accuracy of the side panel and roof for LBBW was well controlled and the requirements on LBBW were met. Design optimization of roof and side panel product, innovation and optimization of DIEL process and structure as well as the flexible self-adaption function of weld fixture, could effectively guarantee the LBBW dimensional accuracy of BIW.
作者
余魁
朱亮
陆磊
柳玉起
YU Kui;ZHU Liang;LU Lei;LIU Yu-qi(State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science andTechnology, Wuhan 430074, China;Technical Center of Dongfeng Motor Corporation, Wuhan 430058, China)
出处
《精密成形工程》
2019年第4期140-146,共7页
Journal of Netshape Forming Engineering
关键词
激光钎焊
整体整形镶块
浮动工装
尺寸控制
laser beam braze welding
integral restrike and pressing insert block
flexible self-adaption weld fixture
dimensional control
