五軸加工精確輪廓誤差控制實作與分析

Implementation and Analyses on Precision Contour Error Control for Five-Axis Machining

張恒維(Chang-heng-wei)

指導教授 ： 林榮信

國立中正大學/工學院/機械工程學系/碩士(2013年)

摘要

近年來CNC工具機已被廣泛使用在許多工業上，高精度、較少的加工時間及複雜的工件也成為CNC工具機加工的重點，而我們會在傳統的三軸工具機上加設旋轉軸來滿足以上的加工需求。加設旋轉軸後的多軸工具機雖然有許多的優點，但包含旋轉軸的多軸工具機在同動的時候，會產生額外的輪廓誤差，與一般三軸工具機所產生更大的誤差，精度也較低，而對於目前工業界的需求高精度是很重要的研究目標，本研究分析多軸同動實切的輪廓誤差。
　　多軸工具機利用線性軸配合旋轉軸時，所運動的實際軌跡不會是直線而且會產生過切的現象，而加工的誤差會隨著機台的構型、工件所設置的位置與旋轉中心的距離及旋轉角度的大小有所不同，研究中使用的機台構型為工作台傾斜式的五軸工具機，是利用線性軸搭配旋轉軸同動時所產生的誤差，並驗證模擬的成果來分析。接著精確控制輪廓誤差法來改善誤差增加加工工件精度。

關鍵字

工具機 ； 輪廓誤差

並列摘要

CNC machine tools have been widely used in many industries for many years. The requirements for high precision, less processing time and complexity appearance become more and more important on CNC machining. Usually, the industry sets up additional rotating axis on traditional three-axis machine tool to meet the above trends. There are many advantages after add multi-axis rotation axis machine tools, but when includes rotation axis, it will have other contour error. It's very important to have high accuracy for the current industrial field. So, this research analyzes real machining contour error.
　　When multi-axis machine tools use linear axis with rotation axis, the actual trajectory of the movement will not be a straight line and will produce the phenomenon of undercutting. The contour error depends on different configuration of the machine, the distance between of the workpiece location and the rotation center, and the step size of the rotation angle. The machine tool that we use in this research is configuration of the Table-Tilting type five-axis machine tools. We will analyze the contour error when linear axis and rotation axis moving at the same time. In the end of this researcher, we use Precision Contour Error Control to improved contour error.

參考文獻

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