Abstract
This study deals with new geometric calculation method to predict instantaneous cutting force in NC machining process. In previous studies, estimation of undeformed chip form is achieved by geometric calculation with CPU. In this paper, we propose new algorithm based on performance of graphics hardware (GPU). In the proposed algorithm, GPU in rendering process estimates distance from view point 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 in short time. By referring color on rendered image, we can estimate a part of cutting edge removing workpiece in each cutter location and rotate angle. The developed prototype system can predict the instantaneous cutting force at arbitrary position of cutting tool within dozens of milliseconds.
