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題 名 | 高速主軸結構設計問題之分析與修改=Analysis and Modification of Structural Design Problems for a High Speed Spindle |
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作 者 | 陳炘鏞; 徐榮駿; | 書刊名 | 遠東學報 |
卷 期 | 24:3 2007.09[民96.09] |
頁 次 | 頁287-295 |
分類號 | 446.874 |
關鍵詞 | 拉刀機構; 動態剛性; 模態測試; 有限元素分析; Clamping mechanism; Dynamic stiffness; Modal testing; Finite element analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 本文主要為探討高速主軸之結構設計問題,針對某廠商之高速主軸原始設計 結果進行分析與實驗。發現存在有兩個主要問題,分別為拉刀機構之組裝與 主軸運轉之共振問題。就拉刀機構之組裝問題,原始設計上,拉刀機構之盤 型彈簧是鬆散排列於拉桿上,無法設定拉刀力,故先藉由有限元素分析與模 態測試法重新設計拉刀機構,於本研究中提出一新型拉刀機構。就主軸運轉 之共振問題而言,因拉刀機構屬細長結構,在高速主軸之操作頻率範圍內較 可能發生共振現象,為改善拉刀機構的動態剛性,本研究採用增加支撐點的 方式,以提高拉刀機構之動態剛性,同時因拉刀機構為一可移動件,支撐點 不可以固定,故以 O 型環提供必要之支撐,達到提高拉刀機構剛性的目的。 經實驗分析結果顯示: 此改良型拉刀機構具有較原拉刀機構更高之動態剛性 與動態阻尼,且於主軸之操作頻率範圍內已沒有共振現象,完整地解決了原 有的問題點。 |
英文摘要 | In this paper, the structural design problems of a high speed spindle are discussed. The original high speed spindle designed by a manufacturer is analyzed and tested. There exist two important problems. One is the assembly problem of the clamping mechanism and another is the resonant problem. In the assembly problem of clamping mechanism, the disk springs are loose alignment on the draw-bar, and the clamping force cannot be set. Therefore, the original clamping mechanism is redesigned firstly using finite element analysis and modal testing method. A new clamping mechanism, then, is proposed in this study. In the resonant problem of spindle, since, the clamping mechanism is a slender structure. Resonance is more possible to occur in the operating frequency range of high speed spindle. In order to improve its dynamic stiffness, the additive supporting locations are added. Because the draw-bar is also a movable part and cannot be fixed. Hence, the O-ring is used to reach the demand for increasing the dynamic stiffness of clamping mechanism. The results obtained from experimental analysis indicate: the modified clamping mechanism has higher dynamic stiffness and dynamic damping than the original one. There is no resonant phenomenon in the operating frequency range of the spindle. The problems are improved completely |
本系統中英文摘要資訊取自各篇刊載內容。