Material processing by the internai path type CO2 laser robot

摘要

The AMPI has introduced CO2 laser processing equipment featuring 50kW class output which is the greatest in the world. The equipment integrates a 50kW class CO2 laser oscillator, with a portal three-dimensional processing device and an internal path type CO2 laser robot, that is, robot with an integrated laser path. It offers a high degree of freedom in access to workpieces, enabling thereby flexible processing. The essential parameters which exert significant influence upon the laser welding performance are the defocused distance at the laser-irradiated point, the stand-off height (distance between welding nozzle and workpiece), as well as the kind and flow rate of shielding gas. The authors investigated the relationship between the penetration depth and these parameters for workpieces of mild steel and stainless steel respectively, in order to determine optimal values of the parameters. Besides, on the basis of the optimal values thus obtained, the relationship between penetration depth and welding speed was studied. This paper reports the summary of the equipment and main characteristics of the high power CO2 laser robot demonstrated by the investigation.