含孤岛型腔铣削加工的螺旋刀轨生成算法

doi:10.7527/S1000-6893.2015.0122

Abstract

Abstract:

Conventional contour-parallel tool path patterns are inapplicable for milling pockets with islands at high speed because of sharp turning corners. To solve this problem, a new tool path generation algorithm is presented. Firstly, the setting-out points are set on the boundary of island and pocket, and a spiral fashion polyline is created by linearly interpolating the setting-out straights which are connected from the setting-out points of island and pocket. Then, the control points are inserted into the polyline under exponential regularization. Finally, the smooth tool path is generated via any order B-spline curve fitting. The tool path is applicable to pockets with bias island. The experimental results show that compared with the traditional contour-parallel tool path, high-order B-spline curve tool path can be sent directly to machine controller with NURBS interpolation function, the change range of cutting force will be decreased, meanwhile the machining accuracy of island and machining efficiency of pocket will be improved.

Key words: pocket with island, high-speed milling, tool path, setting-out, B-spline

CLC Number:

WANG Jiabin, WANG Xuanrun, LI Shaochen, SONG Yongfeng, LI Xiongbing. Spiral tool path generation algorithm for milling pocket with island[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(5): 1689-1695.

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Spiral tool path generation algorithm for milling pocket with island

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