棱柱腔剖分式钢丝缠绕超高压模具数值模拟

Numerical Simulation of Prism Cavity Split Type Ultrahigh Pressure Die Based on Steel Wire Winding

在由剖分式压缸、支撑环和钢丝缠绕层等部分组成的新型高压模具上,研究了圆弧型腔体和棱柱型腔体对模具应力大小和应力分布的影响。通过理论计算得出钢丝等剪应力缠绕下压缸所能承受的极限内压和需要的缠绕层数,用有限元方法进行计算,从压缸和支撑环剪切应力以及钢丝层轴向应力等多角度进行分析。数值模拟结果表明,相比于圆弧型腔钢丝缠绕剖分式模具,棱柱型腔模具的应力和应力分布更加合理,压缸内部压力向外传递的能力更强,材料利用率高,因此棱柱型腔压缸能够承受更高的内压。

We propose a novel structure of ultrahigh-pressure die which consists of a split compression cylinder,a support ring,and steel wire winding,and the effects of the circular and prismatic cavities on the stress level and stress distribution of the mold are investigated.First,it is determined theoretically what the maximum cavity pressure and the necessary number of winding layers would be.Then,the finite element method is used to calculate and compare the stresses from various angles,such as the shear stresses of the press cylinder and the support ring,and the axial stresses of the steel wire layer.The numerical simulation results show that compared with the circular cavity steel wire winding split mold,the stress and stress distribution of the prismatic cavity mold is more reasonable,and the pressure inside the cylinder is more capable of transferring to the outside,with high material utilization.The findings indicate that the prismatic cavity cylinder can withstand higher internal pressure.