Experiment Research On Warm Deep Drawing Forming Of Magnesium Alloy Square Box

With the rapid development of the automotive, aerospace, electronics and othermodern industry, it is become particular important to save energy, protect the environmentand improve efficiency in production and use. As the lightest metal material ofengineering applications, magnesium alloy is widely recognized because of its excellentperformance and has a broad application prospect. Magnesium alloy has a higher strengthand plastic property due to the smaller grain size and less segregation after deforming thancasting.AZ31B and AZ91are the most widely used of deforming magnesium alloy at present.In this paper, AZ31B is used in the one directional tensile test to analyze the basicstamping formability, and the effect of main process factors such as temperature, andstrain rate on the deformation is identified.A die system of heat drawing is designed to help to study this subject. This system iscompleted on the basis of the improved existing die-set. The heating system uses theeconomical and practical heater bars as the heat source, and a controlled temperatureheating system is set up in it.Through the warm deep drawing experiments for square box of AZ31B magnesiumalloy, the influence of alternated single factor on deep drawing process in condition ofdifferential temperature drawing is emphatically analyzed on the premise that theisothermal experiments are brief analyzed. The influence law of the main formingparameters such as die temperature, punch temperature, blank-holder gap and drawingvelocity of square box in condition of differential temperature drawing process is obtained.At last, several groups of experiments with the orthogonal experimental design are madeto discuss the influence order of these parameters on the deep drawing process of squarebox, a better combination of these four parameters is got, and the drawing depth for squarebox forming of AZ31B magnesium alloy is improved.