基于响应面设计的汽车精密制品翘曲分析及试验研究  

Analysis and Experiments of Buckling of Precision Products for Automotive Based on the Response-surface Methodology

作　　者：涂恒强[1] 辛勇[1] 

机构地区：[1]南昌大学机电工程学院,南昌330031

出　　处：《机械科学与技术》2015年第4期565-569,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：江西省自然科学基金项目(2012BAB206014);江西省高等学校科技落地计划项目(KJLD12058);江西省研究生创新专项资金项目(YC2012-S011)资助

摘　　要：旨在研究复杂曲面类汽车精密制品的翘曲变形情况,在试验设计初期,根据模流分析设计原则,初步确定了影响变形的主要因素的参数值(包括注射时间、模具温度、熔体温度、保压压力曲线和冷却液温度等)。以Z方向的最大变形值作为优化指标,采用CCD(Central Composite Design)二阶响应面设计法,选取熔体温度、保压压力曲线和冷却液温度为试验变量,将响应受多个变量影响的问题进行建模并进行模流分析获得试验结果,采用F检验法检验回归方程的显著性,得出可用的响应面方程,并以此来优化响应,获得最优工艺参数组合,并进行CAE(Computer Aided Engineering)分析检验优化方案的可靠性。对汽车门拉手进行现场跟踪测量,结果表明,与无试验优化的注射成型相比,最优方案可使翘曲变形量减少16%左右,满足精密制品外观功能要求。Aiming at of the buckling of precision products with complex surface for automotive,the parameters of the main factors influencing deformation values including injection time,mold temperature,melt temperature,packing pressure curve and the coolant temperature in the early stages of the design of experiments are determined according to the design principles of mold flow. The maximum value in Z direction as a optimization target,a model for issue of response affected by multiple variables is established by using the CCD second order response surface design method and selecting the melting temperature,the curve of packing pressure and coolant temperature for testing variables,and the analysis of mold flow is carried out so as to obtain the testing results. The optimal combination of process parameters is obtained under the conditions of multiple criteria by identifying the significance of regression equation via F test and drawing the available response surface equation,and the reliability of the optimization scheme is verified by using the CAE analysis. By tracking and measuring the car door handle,the results show that the optimal solution will enable to decrease the amount of buckling above 16%,and to meet the appearance and functional requirements of precision products,comparing with that of injection mold without experimental optimization.

关 键 词：响应面设计 汽车精密制品 翘曲分析 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]