Thermal Crack in the Carbide Face-Milling Cutter : 1 st Report, Results Obtained from the Fundamental Cutting Experiments

Abstract

Fundamental characteristics and cause of the thermal crack which appears in the carbide face-milling cutter have been investigated. The observation of a thermal crack has revealed a lot of interesting features of the initiation and growth of the thermal crack. The cause of a thermal crack of the carbide face-milling cutter has been considered from the view-point that, as generally said, it is due to the thermal shock accompanying the intermittent cutting. Next, the influence of cutting conditions on the thermal crack has been investigated and sometimes found explainable by the above consideration. At last, several grades of carbide have been examined experimentally in respect to the occurrence of the thermal crack.