Numerical simulation for inverse extrusion forming of the hole of a rigging joint based on DEFORM

Abstract

In order to study the feasibility of hot forging forming process for rigging joints, the numerical simulation of hot inverse extrusion forming technology of the hole of a rigging joint is analyzed with finite element method, and the formability of rigging joint hole is analyzed from both metal flow regularity and metal streamline distribution. The relationships of rigging joints under different extrusion conditions between stress field, strain field and change of grain size of the extrusion parts are studied. The extrusion technological parameters are obtained which are initial temperature of 1 100~1 150 ℃ and extrusion speed of 10 mm/s. Through finite element analysis, after forming of the hole under extrusion, the simulation results show that the distribution of metal flow line is reasonable, there is no obvious cross or fracture, the forming result is good, and the dimensional accuracy is high. So the hot inverse extrusion forming of the hole of the rigging joint is feasible.

Keywords

• plastic forming processing and equipment
• rigging joint
• inverse extrusion
• forming of the hole
• numerical simulation
• molding process