| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 98 === This study investigates the formability of AZ31 magnesium alloy sheet when pressing the product with concave and convex shapes by embossing process. Firstly, finite element software DEFORM is applied to simulate the effect of process parameters on forming characteristics under embossing process. Process parameters considered in the study includes die radius, constant friction factor, draft angle and indentation depth of embossing. By the changes of process parameters, the forming loads and completeness of die pattern with concave and convex shapes are discussed. Secondly, take one set of simulated parameters to fabricate an experimental die, embossing experiments are carried out by using magnesium alloy sheet, the experimental results are compared with the simulated results to prove the accuracy of simulation model.
Finally, from the measurement of hardness and metallographic observation of embossed part, the influence of forming temperatures on the strengths and microstructures of magnesium alloy sheet under embossing process can be evaluated.
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