Cheng Y.-Q.,Guangdong University of Technology |
Liu Y.-F.,Guangdong University of Technology |
Xu S.-N.,Guangdong University of Technology |
Guo Q.,BYD Company Ltd Co.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2012
In order to explore the effect of the velocity mode on backward extrusion forming of AZ31 magnesium alloy cup, the finite element method and experiment were used to analyze the procedure on servo press, which was compared with the forming on ordinary crank press and hydraulic press.The results of finite element analysis indicated that the maximum damage of backward extrusion for servo press and hydraulic press at the final forming stage were 3.41 and 3.30 respectively, which were lower than 6.08 for ordinary crank press.The maximum difference temperature was only 45°C for servo press, 127°C for ordinary crank press and 70°C for hydraulic press.The experimental results proved that the backward extrusion cup of AZ31 magnesium alloy with the thickness of 3mm could be formed under the 1100kN servo press, while the fracture appeared at the flange under the ordinary crank press.The experimental results were agreed with the numerical results.