汽车覆盖件模面设计中的复杂大孔洞填充算法  

Filling algorithm on complex large hole in die face design for automotive cover panels

作　　者：李行 章志兵[1] 柳玉起[1] 王振[1] Li Xing;Zhang Zhibing;Liu Yuqi;Wang Zhen(State Key Laboratory of Material Processing and Die&Mould Technology,Huazhong University of Science&Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《锻压技术》2023年第1期53-58,共6页Forging & Stamping Technology

基　　金：广东省重点领域研发计划项目(2021B0101220001)。

摘　　要：为了解决汽车覆盖件模面设计中复杂大孔洞填充的质量问题,提出了基于能量优化网格和分区曲面拟合的孔洞填充算法。该算法利用控制线对孔洞进行拓扑分区,降低大孔洞的填充难度;采用网格预填充和分区曲面拟合的方法,间接构造填充曲面,提高了复杂孔洞填充的稳定性;采取分区三角剖分和整体网格优化的策略构造补孔网格,生成的网格兼具整体光顺性和分区独立性,保证后续分区拟合曲面的正确性。采用该算法对实际汽车覆盖件零件进行了孔洞填充测试,结果表明,该算法生成的填充曲面质量好且满足边界处的G0连续。提出的算法支持基于控制线自动分区构造填充曲面,填充的稳定性和质量好,适合复杂线框孔洞的填充,具有工程应用价值。In order to solve the problem of filling quality for complex large holes in die face design of automotive panels, a hole filling algorithm based on energy optimization mesh and partition surface fitting was proposed, which used control lines to partition the holes topologically to reduce the difficulty of filling large holes. Then, the filling surfaces were constructed indirectly to improve the stability of complex hole filling by using the method of mesh pre-filling and partition surface fitting. Furthermore, the strategy of partition triangulation and overall mesh optimization was adopted to construct the patching mesh, and the generated mesh had both overall smoothness and partition independence, which ensured the correctness of the subsequent partition fitting surfaces. Finally, the algorithm was used to test the hole filling of the actual automotive panels. The results show that the filling surface generated by the algorithm is of good quality and meets G0 continuity at the boundary. The proposed algorithm supports the automatic partition construction of filling surfaces based on control lines, which has good filling stability and quality. Moreover, the proposed algorithm is suitable for filling complex wireframe holes, and has engineering application value.

关 键 词：孔洞填充 控制线 区域分割 网格模型 汽车覆盖件 

分 类 号：TG386.3[金属学及工艺—金属压力加工] TP319[自动化与计算机技术—计算机软件与理论]