Research on Superplastic Gas Bulging Forming of 5A06 Aluminium Alloy Sheet

Abstract

Based on Backofen constitutive equation of 5A06 aluminum alloy at high temperature tensile test, get 5A06 aluminum alloy best superplastic constitutive equation parameters: when T= 400°C,m=0.39, K=270.34.5A06-O aluminum alloy cup gas bulging forming process is simulated with using the method of MARC finite element analysis .By designing a variety of shapes of bilge preform die, to align the bulging parts first post mode when carries on the different effects of the thinning deformation, and analyzes its influence on cup final thickness distribution of the rule.The superplastic test and positive and negative bulging simulation study results of 5A06-O aluminium alloy plate for commercial supply condition (the original thickness of 2 mm) show that the optimized blow the thinning deformation is greatly improve the cylindrical pieces of the final wall thickness distribution, the most in thin wall thickness from the simple was blowing bulging of increased by 0.94 mm, 0.65 mm Wall thickness distribution index is 0.079.