关键词: 五轴加工, 等距双非均匀有理B样条曲线, 参数同步, 插补算法

Abstract: The isometric double-NURBS toolpath for five-axis machining was generated by discrete tool path data,which parameters were not synchronous.For this problem,a parameter synchronization model of isometric double NURBS toolpath was proposed,and the synchronous motion of two NURBS curve parameters in the interpolation process was realized.The stable three-axis machining NURBS curve interpolation algorithm was utilized to interpolate the cutter tip points NURBS curve of isometric double NURBS toolpath for five-axis machining.In terms of parameter synchronization model,interpolation algorithm could be mapped to cutter points NURBS curve.MATLAB simulation results showed that the proposed model could make the tool interpolate synchronously along the isometric double-NURBS tool path,and could achieve high process precision which was mainly concentrated on the 10-6mm series.

Key words: five-axis machining, isometric double-NURBS curves, parameter synchronization, interpolation algorithm