Design of aerogel ultrasonic milling circular tool
                                                            ZHANG Yun dian, CHU Rui, DONG Chang shuai, CHEN Jian
                                          (School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract: In order to solve the problem of dust, material sag, damage in processing of aerogel with traditional mechanical, the processing method and cutting tool of aerogel was studied. the method of ultrasonic milling was presented. The structure of circular knife was designed and the vibration characteristics of circular knife which is under the external force, damping force and the sound wave and the natural frequency f under free vibration were analyzed, ultrasonic milling force equation was established to improve that the ultrasonic milling force is smaller than the ordinary milling force from the perspective of theory. ANSYS Workbench software was used to get each modal analysis and get a contrast between the modal vibration mode and vector graph. The results indicate that the vibration along the circular knife radial transmission and the amplitude on the edge of knife is maximum when f=19 407 Hz, its ideal mode of ultrasonic milling, the method of ultrasonic milling has high processing efficiency and can reduce the milling force, improve the the quality of processing and other functions.

Key words: ultrasonic milling; circular knife vibration; modal analysis; milling force equation