In recent years, laser welding machine in the fabrication of car white body, the thick plate welding and cutting, coating of the tube plate cutting, pipeline engineering, shipbuilding industrial application of new progress, and the running cost is falling and the improvement of traditional processing methods or alternative, the production efficiency and product quality improved, constitutes the demand for laser processing technology and strong drive.

With higher energy density and shorter thermal action time, laser welding machine can effectively reduce the metallurgical damage, thermal stress and deformation of welding structure in the weld area, improve the comprehensive mechanical properties of welded joints, and greatly improve the welding efficiency. In recent years, the composite heat source of laser and arc has been developed. On the other hand, the laser can guide the arc, so that the resistance of the arc column decreases, the field strength decreases, and the stability of the arc is improved.

Application of laser welding technology in foreign automobile industry

Robot control system is the brain of robot, which is the main factor to determine the function and performance of robot. The main task of industrial robot control technology is to control the movement position, attitude, trajectory, operation sequence and action time of industrial robot in the working space. At present, the application engineering of robot develops from a single robot workstation to a robot production line. The network technology of robot controller makes the monitoring, diagnosis and management of robot production line more convenient.

At present, robot welding has been widely used in automobile manufacturing industry, such as automobile chassis, seat frame, guide rail, muffler and hydraulic torque converter. Toyota USES spot welding as a standard to equip all its spot welding robots in Japan and abroad. This technique can improve the welding quality, and even try to replace some arc welding operations. Meanwhile, the movement time in short distance is greatly reduced. The company introduced a low-altitude spot-welding robot that can be used to weld underbody parts. The short spot welding robot can also be assembled with a taller robot to work together on the upper part of the body, reducing the length of the entire welding line. Car rear axle, vice frame, rocker arm, suspension, shock absorber and other chassis parts are mostly based on inert gas protection welding, Metal - InertGasWelding, MIG) give priority to the stress of the safety parts, the main components adopt stamping welding, averaged 1.5 ~ 4 mm thickness, welding is mainly in the form of lap joint, Angle joint is given priority to, high welding quality requirement, its quality directly affect the safety performance of cars. After the application of robot welding, the appearance and internal quality of welding parts are greatly improved, the stability of quality is guaranteed, the labor intensity is reduced, and the working environment is improved.