文章基于计算机辅助工程技术模拟了充电口盖的注塑成型，并计算分析其充电孔轴心偏差。通过分析浇口匹配性和流动阻力确定了最佳的浇口位置和进胶方案。采用初始工艺分析得到大孔轴心偏差为2.315 5 mm，不满足设计要求。以工艺参数为自变量设计正交试验，模拟计算不同工艺参数组合下的轴心偏差，探究工艺参数的优化方案。结果表明：模具温度及注射时间的影响为极显著，速度压力切换体积的影响为显著，料筒温度的影响为不显著，优化工艺参数为A₁B₃C₁D₁。通过工艺优化，大孔轴心偏差降至0.854 9 mm，小孔轴心偏差降至0.692 9 mm，并达到设计要求。仿真模拟及实际试模也验证了该优化工艺应用于实际的可行性。

Based on computer aided engineering technology, the injection molding of charging port cover is simulated, and the axial deviation of charging hole is calculated and analyzed. Through the analysis of gate matching and flow resistance, the best gate position and glue feeding scheme are determined. According to the initial process analysis, the shaft deviation of the large hole is 2.315 5 mm, which does not meet the design requirements. The orthogonal test was designed with process parameters as independent variables, and the axial deviation under different combination of process parameters was simulated and calculated, and the optimization scheme of process parameters was explored. The results show that the influence of mold temperature and injection time is extremely significant, the influence of velocity-pressure switching volume is significant, and the influence of barrel temperature is not significant. The optimized process parameter is A₁B₃C₁D₁. Through process optimization, the shaft deviation of the large hole is reduced to 0.854 9 mm, and the shaft deviation of the small hole is reduced to 0.692 9 mm, meeting the design requirements. Simulation and actual model test also verify the feasibility of the optimized process in practice.