压力容器用拱形膜片液压胀形工艺的有限元模拟  

Finite Element Simulation of Arch Diaphragm Bulging Process for Pressure Vessels

作　　者：成鹏飞 孙嘉麟 许岗[1] 许军锋[1] CHENG Pengfei;SUN Jialin;XU Gang;XU Junfeng(School of Materials and Chemical Engineering,Xi’an Technological University,Xi’an 710021,China)

机构地区：[1]西安工业大学材料与化工学院,西安710021

出　　处：《西安工业大学学报》2021年第1期54-59,73,共7页Journal of Xi’an Technological University

基　　金：陕西省青年科技新星项目(2016KJXX 87)。

摘　　要：为了探究拱形膜片的加工工艺对膜片成型精度(特别是拱高)的影响,本文采用有限元模拟法研究了一种正拱带槽形膜片(泄放口径100 mm,厚度0.5 mm,刻槽0.2 mm)的液压胀形过程,分析了加载压力、加载速度、加载路径、夹具圆角等因素对拱高的影响规律。结果表明:随加载压力上升,拱高呈线性增加;随着加载速度减小,拱高略有降低,并趋于稳定;胀形过程加载变速会导致拱高成型时偏离设计尺寸,因此需要全程匀速加载;随夹具圆角半径增加,拱高增加,夹持部位边缘等效应力减小,膜片夹持部位变形范围增大。该结果可应用于拱形膜片的加工工艺优化。The study is aimed to explore the influence the process for arch diaphragm on the forming precision(especially the arch height).The finite element simulation method was used to study the hydraulic bulging process of a normal arch and grooved diaphragm,whose relief diameter was 100 mm,thickness 0.5 mm,and groove 0.2 mm).The effects of loading pressure,loading speed,loading path and clamping fixture rounded corners on the arch height were discussed.The results show that the arch height increases linearly with the increase of loading pressure.With the decrease of loading speed,the arch height decreases slightly and tends to be unchanged.Variable loading speed will cause the arch height to deviate from the design value,so constant loading is necessary in the whole process;with the increase of the fillet radius and arch height,the equivalent stress at the edge of the clamping part decreases,but the deformation range of the clamping part increases.

关 键 词：拱形膜片 液压胀形 拱高 有限元 

分 类 号：TQ12[化学工程—无机化工]