SPDT vibration imprinting device for tool tip microstructure and application

LV Junjie, YU Hongfei, REN Xu, FENG Kai, WANG Yimeng

(College of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract: Aiming at the problem that the front face of broach is concave and hard, it is difficult to realize the microstructure machining of tool tip surface, the machining principle of single point diamond tool (SPDT) vibrating press printing microstructure was studied. A tool tip microstructure SPDT vibratory imprinting device was proposed. 3 rows and 30 columns of round pit microstructure was successfully prepared on the front of the test broach by this device. Their maximum circular section diameter was 30 μm and the depth was 10 μm. And the test broach was compared with the conventional broach. The effect of tool tip microstructure on broaching load was studied. The results show that in the stable broaching stage, compared with the conventional broach, the average broaching load, maximum and minimum broaching load of the test broach respectively is achieved by 5.20%, 5.04% and 12.33%. It shows that the broaching load can be effectively reduced after the microstructure is prepared at the front of the broach, which is helpful to improve the broaching performance and the existing machining technology.