汽车仪表盘贴膜仿真及其工艺参数优化

Simulation of Film Posting of Instrument Panels of Cars and Optimization of Process Parameters

以聚甲基丙烯酸甲酯(PMMA)为薄膜材料,对仪表盘外壳进行模外装饰(OMD)贴膜,采用有限元方法对该成型过程进行模拟仿真,获得了薄膜厚度的分布及其在x、y方向变形分布,分析了影响薄膜成型的因素。以成型后薄膜厚度平均值的标准偏差及其在x、y方向变形量的标准偏差同时最小为目标,采用试验设计(DOE)中的正交数组法对其各项工艺参数进行优化分析。结果表明,优化之后,薄膜的最大厚度为0.2013 mm,最小厚度为0.1883mm,相比优化前减小了0.5%;薄膜在x方向、y方向的最大变形量分别为3.125、3.250mm,相比优化前减小了5.5%。

The meter shell was decorated with a polypropylene film. And the film thickness and its deforming distribution in x, y direction were obtained through finite element simulation, and the influencing factors of film forming were analyzed. Aiming at the goal of the minimum standard deviation of average film thickness and its deforming distribution in x, y direction, the process parameters were optimized and analyzed using design of experiment method. Optimization gave the maximum film thickness of 0. 2013 mm, and the minimum thickness was 0. 1883 mm. The maximum deformation of the film in x and y direction were 3. 125 and 3. 250 mm, respectively.