【摘要】 采用NSGA-Ⅱ及正交实验法与门铃挂架注塑成型有限元模拟技术,确定了符合产品质量特性和能效的多目标最佳工艺方案。以门铃塑件注塑工艺参数为实验变量,翘曲总变形、产品重量及能耗为响应优化指标,基于Moldflow模流分析设计多因素多水平多目标正交试验模型,并借助正交表进一步设计NSGA-Ⅱ优化模型。利用极差分析方法及Pareto前沿解分析了各因素对多目标优化指标的影响规律,并通过试模实验验证了2种优化实验模型的可行性及其优化效果。研究发现,保压压力和熔体温度是影响产品质量特性和能耗的主要因素,并获得多目标优化最佳成型工艺方案。优化后的成型工艺方案提高了PIM过程的稳定性,产品翘曲变形值、重量及能耗分别降低了16. 3%、3. 0%、18. 9%,符合企业绿色制造的要求。更多还原

【Abstract】 The NSGA-Ⅱ,orthogonal experiment method and the doorbell hanger injection molding finite element simulation technology were applied to determine the multi-objective optimal process scheme in compliance with product quality characteristics and energy efficiency. The plastic injection molding process parameters were taken as experimental variables,and the warp deformation value,product weight,and energy efficiency as the response optimization targets,and the multifactor,multi-level and multi-target orthogonal test model was designed based on Moldflow simulation,and the NSGA-Ⅱ optimization model by means of orthogonal tableswas designed. The influence of various factors on the optimization targets were explored by using range analysis and pareto-optimal front,the feasibility and optimization effect of the optimized experimental model were verified through the injection molding. The result found that the major factors of the product quality characteristics and energy efficiency were packing pressure and melt temperature,and the best injection molding process of the plastic multitarget optimal was got. The optimized molding process scheme significantly improved the stability of the PIM process,and the warp deformation value,product weight,and energy consumption of the product were reduced by 16. 3% 、3. 0% 、18. 9%,respectively,which corresponded with the company’s green manufacturing requirements.更多还原