Fast Estimation Method of Workpiece Shape in NC Machining Process for Prediction of Instantaneous Cutting Force

This study deals with geometric calculation method to predict instantaneous cutting force in NC machining process. In this paper, a new algorithm to introduce performance of new graphics hardware (GPU) is proposed. In the developed algorithm, GPU in rendering process estimates distance from viewpoint to tool swept volumes, initial workpiece shape and locus surface of cutting edge and detects the nearest surface from reference plane on each view line. By referring color on rendered image, GPU can detect a part of cutting edge removing workpiece in each cutter location and rotate angle in short time.