Laser-assisted Micromachining System Building And Cutting Experimental Study

To achieve processing precision three-dimensional micro engineering ceramic material parts fastly and efficiently, this paper especially designed and constructed laser-assisted micromachining system, and carried out cutting experiments to Al₂O₃ ceramic rod utilizing autonomously constructed laser-assisted micromachining system.To predict workpiece temperature distribution during heating by laser, this paper carried out mathematical modeling and temperature field simulation to Al₂O₃ ceramic rod utilizing ANSYS software. And utilizing FLIR infrared camera actually measured the temperature field of laser heated workpiece, to verify the accuracy of simulation results. Give an introduction to the four main components of laser-assisted micromachining system in detail.Adopting single factor method conducted laser-assisted micromachining experiments on Al₂O₃ ceramic rod.Workpiece temperature changing trend in simulation is consistent with the actually measured results, and workpiece temperature results in simulation are slightly higher than actually measured value. Laser-assisted micromachining experiments testified laser power is the main factor affecting the processed surface quality, tool wear and cutting force.Compared with conventional cutting method, in laser-assisted micromachining when laser power P=240W, the surface roughness value can reach 0. 451?m, decreased about 47%, tool wear in the length direction decreased about 42.3%, in the depth direction decreased about29.2%, and the cutting force decreased about 78.5%. During cutting process, tool wear,processed surface roughness value and cutting force can reach the best under small feed rate.