Laser Welding Application for Side Panel in Car Body Manufacturing

摘要

Laser welding application for car body manufacturing has many advantages in thernstiffness and the lightness of vehicle, the productivity of assembly line, and the degree ofrnfreedom in design. This presentation will express the innovation of car body manufacturingrnincluding parameter optimization, process modeling, and system integration. In thisrnapplication the investment for systems was cut down dramatically by real time switchingrnover the laser path between two welding stations. Points of technical discussion are asrnfollows: optimization of parameters such as laser power, robot speed and trajectory, compactrnand useful design of jig & fixture to assure welding quality for 3 sheet-layer zinc-coatedrnsteel, system integration between 4kW Nd:YAG laser device and the other systems, on-linernreal time welding quality monitoring system, perfect safety standards for high power laser,rnminimization of consumption costs such as arc lamp, protective glass for optic, etc.rnLaser welding has found a place on Hyundai’s production plant in conjunction withrnthe startup of mass production of new sports car, and this production system is the result of arncollaboration of its engineers. Outer side sheets are joined to inner side sheets by 122 stitchrnwelds totally. And the length is about 2.4meter.