外文翻译---笔记本上盖外壳的镁合金薄板冲压模具设计 英文版.doc

PAGE 设计巴巴工作室 Die design for stamping a notebook case with magnesium alloy sheets Content Summary In the present study，the stamping processfor manufacturing anotebook top cover case with LZ91 magnesium–lithium alloy sheet at roomtemperature was examined using both the experimental approach and the finite element analysis. A four-operation stamping process was developed to eliminate both the fracture and wrinkle defects occurred in the stamping process of the top cover case. In order to validate the finite element analysis，an actua four-operation stamping process was conducted with the use of 0.6mm thick LZ91 sheetas the blank. A good agreement in the thickness distribution at various locations between the experimental data and the finite element results confirmed confirmed the accuracy and efficiency of the ementanalysis.The super or for mability of LZ91 sheet at room temperature was also demonstrated in the present study by successful manufacturing of the notebook topcover case. The proposed four operation process lend sit selftoan efficient approach to form the hinge in the notebook with less number of operational procedures than that required in the current practice. It also confirms that the notebook cover cases can be produced with LZ91 magnesium alloy sheet by the stamping process. It provides an alternative to the electronics industry in the application of magnesium alloys. Keywords: Notebook case；LZ91 magnesium–lithium alloy sheet；stamping； Multi-operation；Formability 1. Introduction Due to It slight weight and good performance in EMI resistance, magnesium alloy has been widely used for structural components in the electronics industry, such as cellular phones and notebook cases. Although the prevailing manufacturing process of magnesium alloy products has been die casting，the st- amping of magnesium all sheet has drawn interests from industry because of its competitive productivity and performance in the effective production of thin-walled structural