基于气辅技术与正交试验的汽车门把手成型工艺优化

Optimization of Molding Process of Automobile Door Handle Based on Gas Assisted Technology and Orthogonal Test

以某汽车门把手为例,填充物为PP+20%GF,通过CAE技术进行气辅成型仿真模拟,针对气体体积百分比和总翘曲变形量的双质量指标为要求。通过正交试验,建立了五因子四水平的正交试验矩阵L16(4^(5)),运用综合评分法,将双质量指标进行相应的标准化处理,并计算其线性组合得到综合得分值。通过极差的方法分析综合得分值,得到影响质量指标权重的因子从大到小分别是气体压力(D),熔体温度(B),气体延迟时间(C),模具温度(A),气体时间(E)。最后,通过优化的最佳工艺参数A1B2C2D2E3进行数值模拟,得到塑件的气体体积百分比为33.25%,总翘曲变形量为1.756mm,实际试模结果也比较理想,同时也证明了正交试验的实际可行性。

Taking an automobile door handle as an example, the filler is PP + 20% GF. The simulation of gas assisted molding is carried out through CAE technology. The double quality indexes of gas volume percentage and total warpage deformation are required. Through the orthogonal test, the orthogonal test matrix L16(4^(5)) with five factors and four levels is established.The double quality indexes are standardized by using the comprehensive scoring method, and the comprehensive score value is obtained by calculating their linear combination. By analyzing the comprehensive score value through the range method, it is obtained that the factors affecting the weight of quality index are gas pressure(D), melt temperature(B), gas delay time(C), mold temperature(A) and gas time(E). Finally, through the numerical simulation of the optimized process parameter A1B2C2D2E3, it is obtained that the gas volume percentage of the product is 33.25% and the total warpage deformation is 1.756mm. The actual mold test results are also ideal. At the same time, it also proves the practical feasibility of the orthogonal test.