Curve turning interpolation algorithm with three parameters path planning

YU Zhen1, YI Lei1, TANG Qiuhua1, LI Ming1，2, CAO Jun1
(1.College of Machinery and Automation, Wuhan University of Science and Technology, Wuhan 430081, China;
2.College of Sciences, Wuhan University of Science and Technology, Wuhan 430081, China)

Abstract: Aiming at maintaining the machining accuracy of components with complex curve in CNC turning, a turning interpolation algorithm with three parameters path planning based on ordinary two parameters process was proposed. The interpolation process was decomposed into the optimal path searching and selecting problem between several interpolation points. Decision variable was set, value was discriminated according to the machining requirements, thus three parameters were integrated to achieve the interpolation of parts with complex curve, and adjustment of tool was accomplished. According to the related calculation examples, the results indicate that the smoothness of processing curve can be guaranteed through the proposed approach, and the machining quality is improved,also lower computational scale, smaller solution time and less processing error are achieved.
Key words: CNC turning; triparameters curve interpolation; path planning algorithm