近年來由於3C產業快速發展,因應輕薄短小的要求,鎂合金逐漸受到產業界的重視,目前用於沖壓製程之鎂板以AZ31為主,然而因為其在常溫的成形性不佳,而鎂鋰合金藉由鋰元素的添加,可改善其常溫之成形性。 本研究利用有限元素分析軟體Dynaform針對應用於鎂鋰合金金屬板材之板液壓成形進行有限元素分析,藉由模擬板件在成形過程中之厚度分佈與減薄率,深入探討各項製程參數對於板件的成形性影響。 首先藉由材料試驗取得金屬板材之基本材料性質,以現有的模具透過有限元素分析進行板液壓成形的模擬,並與實驗相互驗證成形結果,檢視有限元素分析的準確性。並建構出板液壓成形製程之有限元素模型,配合田口法進行參數設計與最佳化。
Magnesium alloys have been widely used for structural components due to its lightweight and high specific strength. The ductility of magnesium alloys can be improved with addition of lithium composition. This research used Dynaform to analyze the hydroforming process for magnesium alloy LZ91 sheet, and examined the formability of metal sheet by measuring the thickness distribution and thinning ratio. These two indications will be influenced by important factors. The material properties were first obtained through experiments for the authenticity of simulation. This research will use the existing tooling constructing the simulation model, and verify the authenticity through experiments. And then the concept with Taguchi method was used to realistically mimic the pressure loading in the finite element model.
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