Experimental Study on “ Overburning ” of Corner Cut by Three Dimensional Laser

 Yang Haihua,  Feng Aixin,  ZhaoYing , Cheng Hao. Experimental Study on “ Overburning ” of Corner Cut by Three Dimensional Laser [J]. Hot Working Technology，2019,48(01):59-63

Abstract

When a workpiece with corner is cut by 3D laser, overburning occurs at the corner due to excessive energy.The cutting of 45 steel corner was studied by 3D laser cutting machine integrated by 2 kW Rofin fiber laser, RX160L Staubli robot and auxiliary equipment. Reducing the process parameter points at the corner, optimizing the motion posture of the robot in the laser cutting process and optimizing the process parameters were put forward to reduce the overburning phenomenon. The research results show that when the laser power is 600W, the cutting speed is 25mm/s and the auxiliary gas O 2 pressure is 0.21MPa, overburning phenomenon of corner cutting can be effectively avoided after process optimization, the cut section obtained is smooth and has no slag after the process optimization. With the increase of laser power and auxiliary gas pressure ，the width of the slit increases ； with the increase of cutting speed, the width of the slit decreases. With the increase of laser power, the cutting surface roughness decreases; with the increase of cutting speed and auxiliary gas pressure, the cutting surface roughness decreases first and then increases.