Application of the cubic NURBS interpolation for fairing of high speed machining toolpath

Abstract

The paper presents the method for fairing of High Speed Machining toolpaths to improve quality and efficiency of machining process. The proposed method has adopted the cubic Non-Uniform Rational B-Spline (NURBS) interpolation and C2- condition to generate a transition toolpath that connects two discontinuous machining toolpaths to be a smooth toolpath. Proposed method was applied to generate the transition toolpath for two cases: (i) corner-machining toolpath; (ii) layer-connection toolpath. The transition toolpath was proposed of circle form for the first case; and of helical form for the second one. Application of the cubic NURBS model for interpolation of transition toolpath satisfies C2 -condition at the toolpath-connection point. Therefore it ensures stability, quality and productivity of High Speed Machining process.