扇形高度控制法在加工路徑分析之應用

Applied Scallop Height Method to Cutting Path Analysis

劉履新(Lu-Sin Liu) ； 林尚志(Shang-Jhih Lin)

《中華科技大學學報》 46期 (2011/01) Pp. 1-13

https://doi.org/10.7095/JCUST.201101.0001

摘要

本研究是針對球形端銑刀切削曲面的路徑規劃進行研究探討，提出一套能因應切削曲面的表面粗糙度和尺寸精度需求，同時也是加工時間最短的刀具路徑規劃法。規劃分析程序，首先本文應用Pro/E軟體建立加工件之模型，根據模型所設定之加工參數，進行加工曲面之曲率分析以獲得相應可用之最大的球形端銑刀半徑R。其次以PRO/NC系統以及VERICUT軟體對應用兩種模擬方法進行刀具路徑分析，一種是扇形高度控制法，該刀具路徑的徑向進給率會隨著曲面的曲率變化而改變，在曲率變化量較小的地方會加大刀具路徑的間隔，在曲率變化量較大的地方也會減小刀具路徑的間隔；另一種徑向切深控制法是以曲率分析的方式獲取出符合扇形高度要求的刀具路徑的徑向進給率，則刀具路徑的間隔為固定值；最後兩種方法都以不同入刀角度切削以探討切削時間的差異。根據本文分析結果可以得到較佳之切削路徑建議以減少加工時間。

關鍵字

扇形高度 ； 弦高誤差 ； 球形端銑刀

並列摘要

This research is aims at the path plan of BALL MILL cutting curved surface proceeding research, proposed a set of cutter path plan law that conform to the surface roughness and dimensional precision of cutting curved surface, simultaneously also be the machining period shortest. The plan analysis program, this article establishment model by the Pro/E software first, according to the machining parameters model hypothesis, proceeding curvature analysis of machining curved surface to obtain the biggest radius R of BALL MILL. Secondly, proceeding cutter path analysis by the PRO/NC system as well as the VERICUT software with two simulation methods, one is the Scallop-Height control method, this radial feed rate of cutter path will changes with the curvature variation, enlarge the interval of cutter path when the curvature variation small, and reduce the interval of cutter path when it is big; another is radial depth of cut control method, using the curvature analysis obtain the radial feed rate of cutter path which tallies with Scallop-Height, then the interval of cutter path is a fixed; finally, two methods both cutting by differently angle to discuss the difference of cutting time. According to the analysis result of this article gained the better suggest of cutting path to reduce the machining period.

並列關鍵字

Scallop-Height ； Chord Errors ； Ball Mill