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摘要：
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以乘用车门外板为研究对象，研究了表面曲率对零件表面缺陷的影响。通过对多种零件的数据对比和经验分析，提出了零件表面斜度与表面缺陷等级的对应关系，即：当斜度小于0.003时，表面缺陷不可见；当斜度大于0.009时，表面缺陷不可接受。利用表面曲率分析的方法，对门外板高风险区域进行识别，结合Autoform软件对冲压过程中的滑移线以及面畸变等缺陷进行预测，并根据分析结果采取相应的补偿措施。结果表明，优化后的门外板经过GSQE检测，表面缺陷可得到有效抑制和消除，达到了乘用车门外板的质量要求。
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For the automobile door outer panel, the influences of surface curvature on the surface defects of parts were studied, and the corresponding relationship between the surface slope of parts and the surface defect level was proposed by the data comparison and the experience analysis of various parts. When the slope was less than 0.003, the surface defects were not visible, and when the curvature was greater than 0.009, the surface defects were not acceptable. Then, the high-risk area of door outer panel was identified by the surface curvature analysis method, and the slip line and the surface distortion in the stamping process were predicted combined with software Autoform. According to the analysis results, the corresponding compensation measures were conducted. The results show that after the optimized door outer panel is tested by GSQE, the surface defects are effectively suppressed and eliminated to meet the quality requirement of automobile door outer panel.
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基金项目：
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广西创新驱动发展专项课题（桂科AA18118040）；柳州市科技计划课题（2018AD50301）
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作者简介：
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李恒佰（1983-），男，学士，工程师，E-mail：hengbai.li@sgmw.com.cn
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