塑料三通挤胀成型过程的有限元模拟

FEM Simulation of Plastic Tee Bulge Forming Process

塑料挤胀成型是一种新的塑料固态成型方法,目前还没有关于塑料挤胀成型方法系统的研究报道。通过对塑料三通挤胀成型过程进行有限元分析,研究了轴向压缩、胀形压力、过渡圆角和平衡压力等工艺参数对硬质聚氯乙烯管材挤胀成型三通的影响。研究表明,采用有限元分析能够确定合理的胀形压力区间和平衡压力大小,能够预测不同轴向压缩作用和不同模具过渡圆角条件下管坯的变形情况,从而为优化挤胀成型工艺和设计合理的挤胀成型模具及设备参数提供了可靠的依据。

Plastic bulge forming(PBF) process is a newly emerged polymer solid state forming technology.There are few papers published to deal with the PBF process systematically.FEM(finite element method) analysis of plastic tee bulge forming process is conducted.The effects of axial compression,bulge pressure,transition fillet and counterpressure on UPVC (unplasticized polyvinyl chloride) plastic tee forming process are discussed.The results show that FEM analysis can be used to determine the reasonable processing windows such as the magnitudes of bulge pressure and counterpressure.This provides reliable data for establishing the optimum process parameters and designing the molds and equipment of PBF process.