Abstract: The transportation deformation issue of parts during manufacturing process directly affects product quality. Currently, the research of transportation deformation issue mainly focuses on fatigue analysis of transportation racks, while little research and application find on the transportation deformation issue of body parts in the early stage of virtual assessment. In this article, finite element simulation method is proposed to apply to the analysis of transportation deformation of body parts in the early virtual assessment stage. And the quality risk caused by the deformation of the parts during the early stage of the design can be identified. At the same time, methods such as modifying part placement posture, material rack locator layout and product design proposal proposed to optimize transportation deformation issue. Combined with actual project cases, the effectiveness of the analysis method. The results indicate that, compared with the pre-optimization state, the transportation deformation or stress level of the parts has been reduced by more than 50%. This provides theoretical guidance for the design of both parts and transportation racks, shortens the product or rack verification cycle, and reduces manufacturing costs.

Key words: body; transportation deformation; finite element simulation method

摘要： 制造过程中零件的运输变形问题直接影响到产品交付质量，目前针对运输变形问题的 研究主要集中于运输料架等疲劳分析中，针对车身零件运输变形问题在前期虚拟评估中研究 和应用较少。文章提出了在前期虚拟评估阶段，将有限元仿真方法应用于车身零件运输变形 分析中，可以在早期设计阶段识别零件运输变形造成的质量风险；同时，提出了改进零件放 件姿态、料架支撑点布置方案及产品设计方案等方法优化运输变形问题，并结合实际项目案 例对分析方法进行了验证。结果表明，与优化前相比，零件的运输变形量或应力减少了 50% 以上，从而为零件和运输料架设计提供理论指导，缩短产品或料架验证周期，降低制造成 本。

关键词: 车身；运输变形；有限元仿真方法