Structural design of wide edge ultrasonic cutter
                                                               ZHANG Yun dian, CHEN Jian, CHU Rui, DONG Chang shuai
                                     （School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China）

Abstract: Aiming at the traditional cutting method of large size brittleness, sticky food cutting, will produce debris, extrusion and other issues, the model for the design of 20 kHz wide blade ultrasonic food cutter, cutter of transverse vibration and so on were studied. According to the design theory of composite horn, the basic size of the cutter was determined, the transverse vibration of the cutter methods was restrained in the specific location on the slotted cutter. According to the optimization of flow chart, the modal analysis was carried out to obtain the optimal cutting tool model in the ANSYS environment, so that the tool in the 20 kHz frequency around edge vibration mainly by longitudinal vibration, uniform overall vibration amplitude. The laser displacement sensor was used to measure the amplitude of the tool nose and find that the tool vibration isstable. Ultrasonic cutting knife for cutting bread experiment was presented. The results indicate that the ultrasonic cutting knife blade width for food when cutting the overall vibration of uniform, not produce debris, extrusion and other issues.

Key words: ultrasonic cutter; resonant frequency; amplitude distribution