研究通过UG 12.0软件对减速器箱体进行三维建模，确保模型的几何形状和尺寸的精确性与完整性，为后续注塑模拟分析提供基础。模型构建后，通过Moldflow软件对聚对苯二甲酸丁二醇酯（PBT）、丙烯腈-丁二烯-苯乙烯共聚物（ABS）、聚碳酸酯（PC）进行注塑模拟分析，验证材料的注塑加工性。为了预测翘曲行为，在模拟验证阶段，将双域Tait模型和Cross-WLF模型拟合获得的参数输入Moldflow软件进行模拟计算，得出优化后的最佳工艺参数组合。模拟结果显示，在优化工艺参数下，制件翘曲变形量显著减少。PBT、ABS、PC制件的实际翘曲变形量分别减少90.32%、89.81%和90.89%。

In this study, the three-dimensional modelling of the gearbox was carried out by UG 12.0 software to ensure the accuracy and completeness of the geometry and dimensions of the model, which provided the basis for the subsequent injection moulding simulation analysis. After the model was constructed, injection moulding simulation analysis of polybutylene terephthalate (PBT), acrylonitrile-butadiene-styrene copolymer (ABS) and polycarbonate (PC) were carried out to verify the injection moulding processability through Moldflow software. In order to predict the warpage behaviour, the best combination of optimized process parameters was derived by inputting the parameters obtained from the fitting of the dual-domain Tait model and Cross-WLF model into Moldflow software for simulation calculations during the simulation verification stage. The simulation results showed that the warpage deformation of the fabricated parts was significantly reduced under the optimized process parameters. Under the optimized process parameters, the actual warpage deformation of PBT, ABS and PC parts was reduced by 90.32%, 89.81% and 90.89%, respectively.