In order to solve the problems of complex machining and poor quality of the contour boundary along the axial direction in Nomex honeycomb core components

an ultrasonic trepanning method was proposed based on the trepanning process. The ultrasonic trepanning of Nomex honeycomb cores was carried out. Trepanning force measurement and incision quality observation tests were carried out under the tool spindle speed of 500–1500r/min and the feed speed of 1000–3000mm/min

respectively. The experimental results show that compared with the traditional trepanning process

the ultrasonic trepanning with the amplitude of 20μm can effectively reduce the trepanning force under the above machining parameters

with an average reduction of about 20%. The trepanning incision of Nomex honeycomb core processed by ultrasonic trepanning is smoother

more neat and without burrs than that of traditional trepanning. Combined with the experimental results

the relative motion relationship between the tool and the workpiece and the trepanning force during the ultrasonic trepanning process were further analyzed

and the reasons for the low trepanning force and good trepanning quality in ultrasonic trepanning process were theoretically explained.