含孤岛型腔铣削加工的螺旋刀轨生成算法
收稿日期: 2015-03-25
修回日期: 2015-05-04
网络出版日期: 2015-05-08
基金资助
国家自然科学基金(61271356,51205031);中南大学大学生创新训练项目(CL14080)
Spiral tool path generation algorithm for milling pocket with island
Received date: 2015-03-25
Revised date: 2015-05-04
Online published: 2015-05-08
Supported by
National Natural Science Foundation of China (61271356, 51205031);Central South University Innovation Training Project (CL14080)
王家斌 , 王炫润 , 李劭晨 , 宋永锋 , 李雄兵 . 含孤岛型腔铣削加工的螺旋刀轨生成算法[J]. 航空学报, 2016 , 37(5) : 1689 -1695 . DOI: 10.7527/S1000-6893.2015.0122
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
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