In order to study the effect of processing parameters on cutting force and surface quality

the cutting forces in ultrasonic cutting and conventional cutting were theoretically analyzed. On this basis

ultrasonic cutting tests of Nomex honeycomb core with disc cutter were conducted to obtain the influence of the feeding speed

rotating speed and ultrasonic amplitude on cutting force. Further

the number and length of tearing defect were selected as characterization parameters of surface quality and the influence of processing parameters on the surface quality of honeycomb core were quantitatively studied. The test results show that the cutting forces decrease with the increase of rotating speed and the decrease of feeding speed in conventional cutting. As the ultrasonic amplitude increases

the cutting forces decrease significantly. Compared with the conventional cutting

the cutting forces in feeding direction and axis direction of cutter are separately reduced by 53.1% and 33.9% when the ultrasonic amplitude increases to 35μm. The test results of cutting force are consistent with the theoretical analysis. In addition

the number of tearing defects of Nomex honeycomb core decreases with the increase of rotating speed and the decrease of the feeding speed

and the number and length of tearing defects are simultaneously improved in ultrasonic cutting. The conclusions provide guidance for selection of processing parameters in ultrasonic cutting of Nomex honeycomb core.