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題 名 | 機械式沖床滑體驅動機構之運動特性 |
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作 者 | 孫義偉; 顏鴻森; 黃文敏; 邱顯堂; | 書刊名 | 金屬工業 |
卷 期 | 28:4 1994.07[民83.07] |
頁 次 | 頁88-97 |
分類號 | 446.8923 |
關鍵詞 | 沖床; 滑體; 運動特性; 機械式; 機構; 驅動; |
語 文 | 中文(Chinese) |
中文摘要 | 本文的目的在於對現有機械式沖床滑體驅動機構進行運動分析,以瞭解各設計參數對運動特性的影響。文中依剪斷、彎曲、引伸以及壓延等四種加工,歸納出滑體應有的運動特性。由運動分析之結果,得到以下結論。曲柄滑塊機構連接桿長度愈長愈佳,採用偏置並無太大意義。蘇格蘭軛機構由於構造簡單,動平衡易達成,最適於高速沖床進行剪斷加工。Bruderer機構亦用於高速沖床進行剪斷加工,滑動運動特性與曲柄滑塊機構類似,但構造複雜、接頭數多是其缺點。六連桿肘節機構的特點是在下死點附近時,小小的位移能有相當大的力量改變率且滑體有較長的停留,因此特別適合壓印和冷鍛等加工。史蒂芬生型肘節機構、瓦特型肘節機構、八連桿肘節機構以及齒輪五連桿驅動機構設計參數多,理論上適用於各種加工,但實際上則用於滑體運動曲線較複雜的加工;這些機構構造上較複雜,如果用於高速運轉,動平衡問題有待解決。本研究成果有助於機械式沖床動力設計之研究。 |
英文摘要 | The purpose of this work is to study the kinematics characteristics of the slide-driving mechanisms of mechanical presses, and conclude the influence of design veriables. We introduce the motion characteristics of slides based on shearing, bending, drawing, and compression. In conclusion, the length of the connecting rod of slider crand mechanisms should be as long as possible, and the offset is not suggested. Scotch yoke mechanisms are suitable for high speed operations due to the characteristics of simple harmonic motion. Bruderer mechanisms, which are more complex, are used in high speed presses for blanking. The disadvantage of this mechanism is that too many joints make tolerance accumulate. Near the buttom dead center, the knuckle joint mechanism has large mechanical advantage and the slide has loger dwell time, so it is suitable for coining and cold forging. Stephenson type toggle mechanismsms, Watt type toggle mechanisms, eight-bar toggle mechanisms, and geared five-bar drive linkages that have multiple desing veriables, are theoretically suitable for any sheet metal forming processes. They are widely used in the situation that the slide motion is more complex. However, the dynamic balancing in high speed operations is a problem. The dynamic balancing in high speed operations is a problem. The result of this work is benificial to the dynamic design of mechanical presses. |
本系統中英文摘要資訊取自各篇刊載內容。