Space cutter compensation method for five-axis nonuniform rational basis spline machining

作者：Ding, Yanyu^*; Wang, Taiyong; Li, Bo; Dong, Jingchuan; Liu, Zhe

来源：Advances in Mechanical Engineering, 2015, 7(7): 1687814015594125.

DOI：10.1177/1687814015594125

• Space cutter compensation
• five-axis machining
• triple nonuniform rational basis spline
• computer numerical control

In view of the good machining performance of traditional three-axis nonuniform rational basis spline interpolation and the space cutter compensation issue in multi-axis machining, this article presents a triple nonuniform rational basis spline five-axis interpolation method, which uses three nonuniform rational basis spline curves to describe cutter center location, cutter axis vector, and cutter contact point trajectory, respectively. The relative position of the cutter and workpiece is calculated under the workpiece coordinate system, and the cutter machining trajectory can be described precisely and smoothly using this method. The three nonuniform rational basis spline curves are transformed into a 12-dimentional Bezier curve to carry out discretization during the discrete process. With the cutter contact point trajectory as the precision control condition, the discretization is fast. As for different cutters and corners, the complete description method of space cutter compensation vector is presented in this article. Finally, the five-axis nonuniform rational basis spline machining method is further verified in a two-turntable five-axis machine.

• 出版日期2015-7
• 单位天津大学