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博碩士論文 etd-0721100-173921 詳細資訊
Title page for etd-0721100-173921
論文名稱
Title
規則曲面葉輪之加工研究
A Study on Machining of Impellers with Ruled Surfaces
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
61
研究生
Author
指導教授
Advisor
召集委員
Convenor

口試委員
Advisory Committee
口試日期
Date of Exam
2000-07-05
繳交日期
Date of Submission
2000-07-21
關鍵字
Keywords
側銑加工、曲面交接、電腦輔助設計與電腦輔助製造
Blending, Flank Cutting, CAD/CAM
統計
Statistics
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中文摘要
葉輪 (Impeller) 為精密機械、航太工業與能源技術中一項重要的關鍵性零組件。
由於葉輪形狀複雜且具有高度的干涉程度,如何將葉輪精確的加工,實為精密加工
之一大挑戰。

葉輪的加工方法包括點切削與側銑切削,點加工雖為一般所常用之方法,但由
於其加工後之表面會因加工的路徑密度而改變,且較為耗時。為改善這方面的缺點
,而發展出側銑加工的方式來改善點加工的不足。側銑加工法是利用刀具側面之刀
刃對葉輪之葉片曲面進行切削加工,可以大幅縮短加工時間,加工表面刀痕亦較少


本論文之研究目的係利用側銑加工的方法加工葉輪之葉片表面,以線切削的方
式取代點切削,以提高加工的效率,並改善刀具所留下的刀痕,並針對側銑加工所
產生的過切誤差進行探討。在論文中,首先是建構葉片曲面,再針對所設計的曲面
做加工路徑規劃及過切的預防,並配合目前的五軸加工機,實際切削葉輪曲面,建
立葉輪五軸側銑加工技術。並使用以上所提出之方法,建構一套CAD/CAM軟體,提
供葉輪曲面幾何設計、加工程式規劃及切削模擬等功能。
Abstract
Impellers are important components in the field of precision machine, energy
technology, and aerospace industries. Due to their complex geometries and higher
degrees of interference, to produce a impeller with high precision dimension is a
challenging technology.

In this study, flank milling is used to machine blade surfaces of impeller instead
of point cutting. Flank milling can provide a surface better than point cutting without
addition processes. When blades of an impeller are designed by ruled surfaces, the
impeller can be machined by flank cutting technology. Based on the type of a five-axis
CNC machine, the objective of this project is aimed to develop the technology of five-axis
machining for impellers. The involved techniques are : the identification of undercutting
in flank cutting for ruled surfaces, five-axis tool paths generation, coordinate transformations
for five-axis machining, and determination of cutting parameters. In addition, a practical
application example is provided to show the feasibility and effectiveness of the developed
procedure.
目次 Table of Contents
第一章 緒論
1.1 前言
1.2 文獻回顧
1.3 論文大綱

第二章 葉輪曲面特徵
2.1 葉輪簡介
2.2 B-splines曲線插值
2.3直紋曲面
2.4刀具軸心曲面

第三章 刀具位置與誤差分析
3.1刀具軸心誤差分析
3.2刀尖誤差補正
3.2.1建立葉片偏置曲面
3.2.2建立交接曲面與刀尖點位置
3.3五軸座標轉換
3.4五軸進給速度計算

第四章 應用實例
4.1加工機簡介
4.2電腦軟體說明
4.3加工實例

第五章 結論

參考文獻
參考文獻 References
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Choi, B. K. and Ju, S., 1989, "Constant-Radius Blending in Surface Modeling," Computer-Aided Design, Vol. 21, pp.213-220.

Choi, B. K., Lee, C. S., Hwang, J. S., and Jun, C. S., 1988, "Compound Surface Modeling and Machining, " Computer-Aided Design, Vol. 20, pp. 127-136.

de Boor, C., 1978, A Practical Guide to Splines, Springer-Verlag, New York.

do Carmo, M. P., 1976, Differential Geometry of Curves and Surfaces, Prentice-Hall Publishing Company.

Elber, G. and Fish, R., 1997, "5-axis Freeform Surface Milling Using Piecewise Ruled Surface Approximation," ASME Journal of Manufacturing Science and Engineering, Vol. 119, pp. 383-387.

Goetz, A., 1970, Introduction to Differential Geometry, Addison-Wesley Publishing Company.

Gurunathan, B. and Dhande, S. G., 1987, "Algorithms for Development of Certain Classes of Ruled Surfaces," Computer and Graphics, Vol. 11, No. 2, pp. 105-112.

Her, M. J., 1995, "A Study on Ruled Surfaces for Five-Axis Machining," M. S. Thesis, NSYSU.

Lee E. T. Y., 1989, "Choosing nodes in parametric curve interpolation," Computer-Aided Design, Vol. 21, pp. 363-370.

Li, S. and Jerard, R., 1994, "5-Axis Machining of Sculptured Surface with a Flat-End Cutter," Computer-Aided Design, Vol. 26, pp. 165-178.

Liu, Y. T., 1994, "Surface Generation of Impellers of Centrifugal Compressors," M. S. Thesis, NSYSU.

Marciniak, K., 1987, "Influence of surface shape on admissible tool positions in 5-axis face milling," Computer-Aided Design, Vol. 19, No. 5, pp. 233-236.

Max-5 User's Guide, 1990, Northern Research and Engineering Corporation, Woburn, Massachusetts, USA.

Michael, E. M., 1985, Geometric Modeling, John Wiley & Sons, Inc.

Ravani, B. and Ku, T. S., 1991, "Bertrand Offsets of Ruled and Developable Surfaces," Computer-Aided Design, Vol. 23, No.2, pp. 145-152.

Ravani, B. and Chen, Y. J., 1986, "Computer-Aided Design and Machining of Composite Ruled Surfaces," ASME Journal of Mechanisms, Transmissions, and Automation in design, Vol. 108, No. 2, pp. 217-223.

Rehsteiner, F., 1993, "Collision-Free Five-Axis Milling of Twisted Ruled Surfaces," CIRP Annals, Vol. 42, No. 1, pp. 457-461.

Rogers, D. F. and Adams, J. A., 1989, Mathematical Elements for Computer Graphics, McGraw-Hill Publishing Company.

Stute, G., Storr, A., and Sielaff, W., 1979, "NC Programming of Ruled Surfaces for Five-Axis Machining," CIRP Annals, Vol. 28, No. 1, pp. 267-271.
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Takeuchi, Y. and Idemura, T., 1991, "5-Axis Control Machining and Grinding Based on Solid Model," CIRP Annals, Vol. 40, pp. 455-458.

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Tsay, D. M., Yan, W. F., and Ho, H. C., 1999, "Generation of Five-Axis Cutter Paths for Turbomachinery Components," accepted, ASME Journal of Engineering for Gas Turbine and Power.

Tsay, D. M. and Her, M. J., 2000, "Identification of Undercutting and Machining of Twisted Ruled Surfaces," revised, ASME Journal of Manufacturing Science and Engineering.

Tsay, D. M., Chen, H. C., and Her, M. J., 2000, "A Study on Five-Axis Flank Machining of Centrifugal Compressor Impellers," ASME IGTI Conference, May 8-11, 2000-GT-0324, Munich, Germany, also accepted for Publication in ASME Journal of Engineering for Gas Turbine and Power.

Wu, C. Y., 1995, "Arbitrary Surface Flank Milling of Fan, Compressor, and Impeller Blades," ASME Journal of Engineering for Gas Turbine and Power, Vol. 117, pp. 534-539.
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