- 學位論文
曲面上多區塊螺旋切削路徑建構及五軸加工
Curved Surface Multiple Spiral Tool Paths Generation and 5-axis Machining
摘要
本研究提出一套螺旋刀具路徑的建構方法，並以五軸加工法令刀具切削曲面紋路時保持刀軸方向垂直於(法向於)曲面，使曲面上螺旋保持相同的切削深度及路徑間隔，有利於加工面品質或後續的表面處理。 本文建構螺旋刀具路徑切削模式，係由曲面中心點開始連續切削往外螺旋到曲面外圍，也可以建構陣列式多區塊的螺旋路徑。以欲加工之曲面參數方程式為基礎，及刀具半徑資料等條件，透過編寫的程式進行分析及疊代運算，可找到曲面上的等參數刀具路徑切削點資料，經轉換成刀端中心的移動座標軌跡，即能進行五軸切削模擬。 本研究以三次方的Bezier曲面切削為例子，建構多區塊的刀具路徑，經由CAD/CAM軟體模擬及切削驗證，結果顯示曲面利用本方法進行多區塊刀具切削路徑建構，可達到所要求的等參數紋路溝槽加工。
並列摘要
One new spiral tool-path construction is used in this paper. The tool-axial will be perpendicular on the curved surface when the tool moved to cut the curved line and spiral tool-path will keep the same cutting depth and interval of the path on the curved surface, it would advantage for surface treatment or get a quality work-piece after machining. This continuous path will be cutting from inside to peripheral of the curved surface, which started machining at the center point. We can construct array multi-block spiral path as well, which is the cutting mode for the spiral tool-path of this paper. According to Matlab analysis, iterative computation manner and based on curved surface parametric equations and tool radius, the tool-path cutting points can be found on the curved surface. Converted the cutting points into tool-path trajectory, and it will be able to be simulated. Manipulate the Bezier curved surface to construct a spiral tool-path as an example in this paper, the results showed that we could acquire the constant-parameter spiral tool-path on the curved surface by using the present method to simulate via CAD / CAM software.