The Numerical Simulation Of Warm Deep Drawing With Magnesium Alloy Square Box

As the lightest metal material in the engineering application, magnesium alloy getsmore and more concern on vehicle lightweight and property improvement, and gets moreand more extensive use in Aero-space, automobile, communication and electronicsindustry. Since the poor ability of plastic deformation at normal temperature, easyoxidation under high temperature and special requirements of molds when hot forming,study on the forming process at lower temperature of magnesium alloy sheet has importanttheoretical value and practical significance.In this paper, the uniaxial tensile tests are conducted and get the true stress-straincurves of AZ31B magnesium alloy between100℃and300℃. The test data is treated andanalyzed to provide accurate process parameters to finite element simulation.In this paper, the warm deep drawing of AZ31B magnesium alloy square box wastaken as the research object, and the isothermal deep drawing process was simulated byABAQUS, and the effect of forming temperature, blank-holder gap, blank diameter,friction coefficient and blank holder force on the warm deep drawing was analyzed, at thesame time the reasonable range of processing parameters were determined. The materialflow law and thickness distribution in the warm deep drawing process were analyzed.At the same time, the differential temperature drawing process was simulated, theinfluence law of punch temperature, blank-holder gap, blank diameter, friction coefficient,blank holder force, fillet and rounds on the differential temperature drawing process ofAZ31B magnesium alloy square box, and the reasonable range of processing parameterswere determined. After comparing the two different forming processes, the thicknessdistribution, crack position and forming depth in the process of differential temperaturedrawing were analyzed, and got the conclusion that the differential temperature drawingprocess could greatly improve the formability of magnesium alloy sheets.