Abstract
Cutting edge configuration of the tool which changed inclination of rake face of a spherical portion is geometrically analyzed, and variation of inclination angle and normal rake angle along the cutting edge is shown. Geometric quantities such as undeformed chip thickness and area of cutting cross-section in milling with ball end mills having cutting edge of from one to six are compared under same cutting conditions. Cutting forces in milling with above various shaped ball end mills are calculated by using a cutting model and energy method proposed in previous papers. Effect of those tool angles and number of cutting edge on cutting forces are discussed As a result, by increasing the number of cutting edge from two to four, it is found that the changing of cutting forces can be reduced considerably. In addition, to clarify the tool behavior in milling process, an FEM model for a ball end mill having four cutting edges is constituted by using geometric data of cross section of standard type end mill.
