余魁,朱亮,陆磊,等.白车身顶盖激光钎焊焊缝装配尺寸控制方法研究[J].精密成形工程,2019,11(4):140-146.
YU Kui,ZHU Liang,LU Lei,et al.Control Method of BIW Roof Laser Beam Braze Welding Joint Assembly Dimensional Accuracy[J].Journal of Netshape Forming Engineering,2019,11(4):140-146. |
| 白车身顶盖激光钎焊焊缝装配尺寸控制方法研究 |
| Control Method of BIW Roof Laser Beam Braze Welding Joint Assembly Dimensional Accuracy |
| 投稿时间：2019-04-24 修订日期：2019-07-10 |
| DOI：10.3969/j.issn.1674-6457.2019.04.019 |
| 中文关键词: 激光钎焊 整体整形镶块 浮动工装 尺寸控制 |
| 英文关键词: laser beam braze welding integral restrike and pressing insert block flexible self-adaption weld fixture dimen-sional control |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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. |
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