Abstract
Ball end mills are widely used in machining of parts with sculptured surfaces. The properties required for ball end milling are high productivity, high machining accuracy and integrity of machined surface. In this study the machining error theory is applied to the analysis of spherical surfaces. The workpiece material used is plain carbon steel. Cutting tool is a cobalt enriched high-speed steel (Co-HSS) ball end mill. The machining errors are examined for various cutting conditions and cutting modes. The machining error of upper part of machined surface is lager than that of lower part in up cut mode. Furthermore, it is seen that the machining error increases as milling position angle decreases.
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