びびり振動下の切削工具摩耗の解析的推定

抄録

The paper presents an analytical method which enables us to presume carbide tool wear quantitatively in turning operation with chatter vibration, based only upon the measured wave form of the vibration during the operation. The method consists of determination of stresses on both flank and crater wears using dynamic cutting models and the wave form, numerical calculation of temperature upon the wear surfaces, and computer simulation of the wear progress with a wear characteristic equation. The presumed results through the method are in good agreement with the experimental results. It is revealed that chatter vibration increases the flank wear, but decreases the crater wear. appreciably in both the wears. The increase could be attributed mainly to the large normal stress on the flank wear generated during the vibration, while the decrease would be resulted from the reduced contact time between chip and tool face due to the cyclic variance of the undeformed chip thickness.