In the process of processing GH4169 nickel?based superalloy, serious work hardening would occur, as well as difficult machining problems caused by excessive cutting force. The finite element model of two?dimensional orthogonal turning was established by ABAQUS software. The influence of cutting speed and amplitude on cutting force and the change of tool path of GH4169 ultrasonic elliptical vibration turning were analyzed. The results were compared with those of ordinary turning process. The results show that the cutting process parameters in the ultrasonic elliptical vibration turning of nickel?based superalloys have a significant effect on the cutting force. Choosing reasonable process parameters can effectively reduce the cutting force and improve the machining quality.

Finite element analysis software ABAQUS was used to study the process of micro texture PCBN tool turning Cr12MoV, Taguchi method was used to carry out orthogonal experimental design. The variation law of the actual contact area between tool and chip, cutting force and cutting temperature with texture parameters was studied by signal?to?noise ratio analysis method, and the optimal combination of texture parameters was obtained. The results indicate that the actual tool?chip contact area decreases with the increase of texture groove width and texture edge pitch respectively. Texture groove width and texture edge pitch have the most significant influence on cutting performance of the tool; Compared with the non?textured tool, the micro?textured PCBN tool with the optimal texture parameter combination can reduce the cutting force by 5.2% and the cutting temperature by 4.7%.