Directional Tool Radius Compensation Solution of STS Turning Based on Segment Approximation

In STS turning of complex surfaces, compensated values of all linear servo axes were created by normal cutter compensation algorithm. This algorithm was not optimal when surfaces had sudden changing normal vector, while applying compensated value in linear servo axis with less load was optimal choice. A directional cutter compensation numerical algorithm was introduced based on segment approximation, which might solve the directional compensated value, and the normal error was convergence by further optimization of radius subdivision strategy. Verification of algorithm examples and comparison with related algorithm show that the proposed algorithm may be applied in cutter radius compensation of point cloud surfaces or piecewise surfaces. © 2020, China Mechanical Engineering Magazine Office. All right reserved.