An adaptive tool path generation algorithm for precision surface machining

摘要: Abstract In this article an adaptive CNC tool path generation algorithm for precision machining of parts with free-form surfaces is proposed. It aimed at developing a generic methodology suitable having analytical curves/surfaces and/or sculptured (parametric) surfaces, as opposed to most existing NC programming techniques which are unable handle surface cutting. The proposed desired be robust that it can applied generate paths CAD models both two- and three-dimensional curves surfaces. the method, parametric curve on (3D) approximated by sequence linear segments. From current reference point cutting tool, method has capability predicting next given feed. If predicted does not satisfy specified dimension tolerance, then will adjust itself according rules. As result, deviations between generated surfaces/curves always fall within tolerances. addition, conditions all minimum adjustments such tolerance requirement fulfilled analyzed presented. Based adjustment information together position cutter, corrected cutter obtained. A general used test effectiveness method. At respective feedrates 10 30 mm/s, only able replicate contour but also steer constantly stay allowable range tolerance. Therefore, proved effective in generating due its error correction mechanism. This makes suited serve add-on mechanism conventional generators. Particularly, free-form/sculptured where accurate based model real challenge.