伺服沖床可透過編程精準控制沖頭滑塊之位置與速度以實現變速引伸，縮短引伸加工製程所需時間並提升引伸深度。本研究針對影響引伸沖壓曲線之各加工參數與材料特性進行討論，探討變速引伸之運作機制。分析材料性質、引伸比、引伸料片直徑、沖模之模孔直徑、沖頭圓角半徑等相關參數對引伸結果之影響。並透過等速引伸實驗與變速引伸實驗，輔以有限元素法模擬，整合成為變速引伸沖壓曲線制定規則。同時使用動力計量測引伸過程中之沖壓力，透過分析沖壓力變化情形解釋變速引伸作用之原理。
實驗結果可整合成為以各項參數為依據之最大引伸深度預測公式、多次引伸變速公式、引伸曲線規劃關係表，做為引伸沖壓曲線優化之依據。本研究亦提供一引伸沖壓曲線優化範例，做為實際應用之參考。優化後之變速引伸曲線可減少約20%之引伸時間，並提升25%之最大引伸深度。

Servo press are capable of controlling slider motions to generate variable speed drawing profiles, which can save the time of drawing process and increase the drawing depth. This study analyze the influence of material factor, drawing ratio, diameter of drawing material, diameter of die opening, and punch corner radius in drawing process. Making a rule of thumb to generate drawing motion profiles by doing both constant and variable speed experiments. Finite element analyzation and drawing force measurement are also included.
In conclusion, a parameter-based rule of thumb, speed changing formula, drawing profile generating chart, and an example of optimal design process have been made. The optimal drawing profiles can save 20% drawing time and increase 25% drawing depth as a result.

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