Research on the Material Removal of TC17 Titanium Alloy by Picosecond Laser Assisted Belt Grinding

doi:10.3901/JME.2023.09.360

Abstract

Abstract: Titanium alloy has the characteristics of high strength and high thermal strength, which is a typical difficult-to-machine material. Laser assisted machining can change the properties of a material and significantly improve its machinability. A new method of picosecond laser assisted belt grinding of TC17 titanium alloy is proposed, and the influence of laser parameters on surface preheating temperature and different initial pressures of single grain on the main cutting force and material removal behavior is studied based on the picosecond laser-assisted single grain scratching. Simulation results show that the laser power and laser scanning speed have a significant impact on the surface temperature, and the maximum temperature of the laser irradiation surface is 2 019℃ when the laser power is 4.8 W and the laser scanning speed is 300 mm/s, which exceeds the melting point of TC17. Experimental results show that compared with single grain scratch, picosecond laser-assisted single grain scratch can significantly reduce the main cutting force, which can be at a max reduction of 58.7%. The material removal ability has been improved under reasonable laser power, and the laser power is optimal when the laser power is 1.8~2.4 W, while the large laser power will lead to the weakening of the material removal ability. The material removal behavior is still mainly manifested as plastic removal by laser assisted machining, and the chips are transformed into zigzag chips with the increase of laser power. The results of the picosecond laser assisted belt grinding show that the thermal-mechanical coupling effect in the grinding area is reduced, and the processing quality of the surface has been improved.

Key words: picosecond laser assisted belt grinding, single grain, titanium alloy, material removal behavior

CLC Number:

TG178

HE Yi, XIAO Guijian, ZHU Shengwang, LIU Gang, HUANG Yun. Research on the Material Removal of TC17 Titanium Alloy by Picosecond Laser Assisted Belt Grinding[J]. Journal of Mechanical Engineering, 2023, 59(9): 360-372.

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