- 期刊
Process Parameters Analyses on Stainless Steel Circle Cup by Micro Drawing Process
不鏽鋼圓杯微引伸製程參數之分析
摘要
本研究之目的在於探討不同模具角度（α=-15°~15°）對於製作微形圓杯之影響，並進行微引伸實驗來分析模具角度對微形圓杯成形性之影響。本文以Prandtl-Reuss之塑流法則，結合有限元素變形理論與修正材料的應力-應變關係式，建立一增量型彈塑性變形有限元素分析程式，來模擬圓杯微引伸製程，此分析程式是採用廣義之rmin演算法處理彈塑性狀態與模具接觸面之接觸問題。藉由有限元素分析程式的模擬，可獲得圓杯微引伸製程的全部變形履歷、衝頭負荷與衝程之關係、厚度分佈以及應力與應變的分佈圖，藉以觀察成形過程之變化。將模擬與實驗結果做比較，獲得相當一致性之趨勢；亦顯示微形圓杯成形製程，容易產生破裂之區域，均發生在杯緣處。
關鍵字
無資料並列摘要
This study used a micro drawing to determine the effects of die angle (α=-15°~15°) on the formability of micro circle cups. A program for finite element analysis of incremental elastic-plasticity deformation is developed by combining the flow rule of Prandtl-Reuss with finite element deformation theory and the stress-strain relation of correction materials. The program is then used to simulate the circle cup micro drawing process. The program uses general rmin algorithm to solve problems of elastic-plasticity status and die contact. Simulations performed using the finite element analysis program acquire the relations among deformation, punch load, stroke, thickness distribution, stress, and strain distribution during the circle cup micro drawing process, which indicate the changes in the forming process. The simulation was consistent with experimental results, i.e., easily-cracked areas in the micro circle cup forming process appear on the punch fillet.