Nose radius oblique tool: Cutting force and built-up edge prediction

A semi-empirical machining theory is described for predicting cutting forces and temperatures for oblique nose radius tools from cutting conditions and a knowledge of work material flow stress and thermal properties. By defining an equivalent cutting edge based on the chip flow direction, predictions are made for different cutting conditions and tool geometries (nose radii and rake angles in particular). It is shown how the cutting conditions giving a built-up edge can be determined from the predicted temperatures. For finishing conditions a comparison between predicted and experimental results is made and this shows good agreement.