Abstract
This paper describes the prediction of the fracture area and fracture probability in failure of a cemented carbide end-mill under side cutting and side-end cutting operation by the method introduced in previous paper.The prediction method by FEM computer simulation is applied to several cutting conditions mainly using the two-flute end-mills with helix angle 30°. The main results obtained are as follows : (1) It is theoretically predicted that the failure of an end-mill originates at the cutter sweep and the fixed end independently of cutting condition. (2) Only by modifying of applied cutting load, the calculation result approximately agrees with the experimental result. (3) Only by calculation, influence of the depth of cut, feed, cutting position, the position of cutter sweep and helix angle, on the fracture probability and failure position, is investigated. (4) A four-flute end-mill is safer than a two-flute end-mill under the same cutting condition.
