基于计算机辅助的ECU支架注塑成型平面度优化

Optimization of Flatness of ECU Bracket Injection Molding Based on Computer Aided Engineering

随着新能源汽车的发展,电子控制单元(ECU)及其支架的数量越来越多。ECU支架采用塑料化方案可以大幅降低质量和成本,但需要解决翘曲变形导致的平面度的问题。基于计算机辅助技术探究了ECU支架注塑成型平面度的工艺优化方案。针对初始工艺下平面度超标的问题,以模腔温度、注射时间、保压时间和熔体温度等为自变量设计正交试验并进行分析。结果表明:模腔温度对平面度的影响达到极显著程度,注射时间和保压时间对平面度的影响为显著,熔体温度对平面度的影响为不显著;优化的工艺参数组合为A_(2)B_(1)C_(3)D_(2)。优化工艺的仿真结果显示:平面度由初始工艺的8.685 2 mm降至3.978 2 mm,优化率达到54.2%,达到设计要求,且外观状态良好。基于优化工艺的试模样品外观状态及平面度测试结果均满足要求,验证了此优化工艺的正确性。

With the development of new energy vehicles,the number of electronic control units(ECU) and their brackets are increasing.The use of plasticization for ECU bracket can significantly reduce weight and cost,but it is necessary to solve the flatness issue caused by warpage deformation.Based on computer aided technology,the process optimization scheme of injection molding flatness of ECU bracket was explored.Aiming at the issue of excessive flatness in the initial process,an orthogonal test was designed and analyzed with mold cavity temperature,injection time,holding time,and melt temperature as independent variables.The results show that the influence of mold cavity temperature on flatness is extremely significant.The influence of injection time and holding time on flatness is significant,while the influence of melt temperature on flatness is not significant.The optimized process parameter combination is A_2B_1C_3D_2.The simulation results of the optimized process show that the flatness is decreased from 8.685 2 mm in the initial process to 3.978 2 mm,with an optimization rate of 54.2%,which meets the design requirements and has a good appearance.The appearance status and flatness test results of the trial mold samples based on the optimized process meet the requirements,thus verifying the correctness of the optimized process in the article.