以刀具中心點控制為基的多軸加工刀具軸平滑化之研究

現今五軸加工曲面精度與複雜度要求越高的情況下，當自由曲面的刀具路徑產生不連續的現象時，容易使機台震動造成工件表面粗糙度不佳，因此如何使刀具軸均勻的變化成為需要改善的問題。使用刀具軸平滑化需要搭配刀具中心點控制的功能，本論文提出的方法由五軸工具機的三種基本構型所延伸出的數學模組，設計出工作台傾斜型、主軸傾斜型、工作台/主軸傾斜型之轉換介面，使用四元數法插補刀具路徑檔再透過後處理演算法轉出工具機所需的控制程式，再將兩項功能整合達到具刀具中心點控制刀具軸平滑化的功能。本論文開發出視窗介面可依照不同型態的工具機進行刀具軸平滑插補，再將產生出的數控程式經由實體模擬切削軟體VERICUT做驗證，最後，將數控程式應用於PC-based控制器，驗證本研究所發展之演算法的正確性。

關鍵字

五軸加工；刀具軸平滑化；刀具中心點控制；五軸工具機

並列摘要

Nowadays, as the requirements in terms of accuracy and complicity for surface curve by five-axis machining is more demanding, when the cutting tool paths on the free surface curve have any discontinuity, it is easy to cause the vibration of machine that compromises the surface roughness. Thus, how to evenly vary the axles of cutting tools becomes an issue to be improved. The tool axis smoothing requires the combination of the functions for tool center point control. The method presented in this paper is a mathematic module extended from 3 typical five-axis machine tool’s configurations to design the transformation interfaces of table/table, head/head, and table/head. With the quaternion to interpolate the cutting tool path file, the numerical control program required by machine is converted by Postprocessor algorithm. The above two functions are integrated to achieve the function to tool axis smoothing by tool center points control. This paper develops Windows interfaces that can conduct interpolation for tool axis smoothing in accordance with different types of machines. The generated control program can be compared with the solid cutting simulation software, VERICUT. At last, the numerical control program is applied on PC-based controller to verify the correctness of algorithm developed by this research.

並列關鍵字

five-axis machining ； tool axis smoothing ； tool center point control ； five-axis machine

參考文獻

[1]D. N. Reshetov，V. T. Portman，1998，“Accuracy of Machine Tool”，ASME press, New York.

Google Scholar

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