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題 名 | Geometric Models for Improving NC Machining Efficiency and Accuracy of Propeller with a Constant Pitch=幾何方法應用於等距螺槳數控加工效率與精度之改善 |
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作 者 | 郭興家; 任秉銀; 唐余勇; 詹為淵; | 書刊名 | 中國機械工程學刊 |
卷 期 | 20:5 1999.10[民88.10] |
頁 次 | 頁449-455 |
分類號 | 444.7 |
關鍵詞 | 幾何方法; 等距螺槳葉片; 數控加工; Driving face of propeller blade; NC machining; Ballend cutter; Geometric model; |
語 文 | 英文(English) |
中文摘要 | 本文以計算幾何與微分幾何理論解析等距螺槳葉片的工作面方程。據此方程建立 螺槳葉面數控機製時,尋求對應球銑刀之最大容許半徑,並給出數控加工中行距及步長的定 量分析與計算模型。應用此相關之幾何模型就能計算出該封閉曲面才具最大之實際加工誤差 量。最後以實例驗證了上述是屬可行且可靠之方法和模型,而在加工效率與精度方面亦能優 於傳統之方法。 |
英文摘要 | By Means of the theorics of computational geometry and differential geometry, the equation of the driving face of a propeller blade with a constant pitch is presented. The model for defining maximal admissible ball-end cutter radius used in the NC machining of propeller blade surface is deduced. The models for numerical analysis and for calculation of step lengths and path intervals are also provided. Besides, the related geometric model for calculating the actual maximal error by using the envelope surface of the cutter is presented. Finally, the fesibility and reliability of the proposed models and methods are verified by an example. It is also verified that the proposed method provides improved machining efficiency and accuracy relative to many other common contemporary methods. |
本系統中英文摘要資訊取自各篇刊載內容。