鎂合金數位相機外殼衝壓成形之多道次製程設計與分析

Design and Analysis of Multi-pass Stamping for Digital Camera Cover of Mg Alloy

陳國洲(Guo-Zhou Chen)

指導教授 ： 楊東昇

國立虎尾科技大學/工程學院/創意工程與精密科技研究所/碩士(2010年)

摘要

由於現在的電子產品都是輕薄短小，例如：隨身碟、行動電話、筆記型電腦等，因此需要使用如鎂合金等較輕的金屬，才能減輕產品的重量，可是大部分的鎂合金在常溫下之成形性差，因此鎂合金之溫間金屬成形技術也漸受到重視。本文為研究鎂合金的照相機外殼之多道次衝模設計與製造，並使用有限元素分析軟體模擬鎂合金相機外殼溫間之深引伸及精密剪切過程，探討不同參數如模具圓角半徑、壓料力、衝頭與模具的間隙等參數之影響。其次設計較佳之製程參數及模具尺寸，使得相機外殼符合尺寸公差且得到較佳之斷面品質。最後，由實驗對深引伸與精密剪切模擬結果做比對，證實有限元素法可準確預測深引伸與剪切製程之結果。並利用所預測之深引伸與剪切之參數建構出適用於相機外殼之沖壓與剪切模具開發。

關鍵字

鎂合金深引伸 ； 有限元素法 ； 溫間成形 ； 精密剪切

並列摘要

In this paper the magnesium alloy of the digital camera cover as design and manufacturing is studied systematically. First, by uniaxial tension tests at room and mid-high temperatures, the basic formability of stamping of AZ31 magnesium-alloy sheets. The simulation stamping formability of AZ31 magnesium-alloy sheets, such as the sphericity and rectangle deep drawing formability, shearing and so on, are studied by Finite element method and experiments, which offers the basic reference criterion for the stamping processing. The experiment results show that the formability of stamping of AZ31 magnesium-alloy sheets is lower at room temperature and higher at mid-high temperature.
Second, better design of process parameters and die size, such as die temperature sheet temperature, distortion velocity, lubricating agent, were studied by the numbers in producting AZ31 magnesium alloy digital camera cover. Experiments in mechanical forge machine made clear that bug of deep - drawing crack could be resolved, so long as die parameters, die temperature, distortion velocity lubricating agent were accurately controlled, so magnesium alloy digital camera cover can be produced successfully by punch.

並列關鍵字

Magnesium alloy ； Deep drawing ； Finite element method ； Warm deep drawing

參考文獻

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