Laser welding is a necessary process method in modern mechanical manufacturing industry, which is widely used in automobile manufacturing. With the progress of science and technology, the welding of coated steel plates and light metal materials poses new challenges to automobile welding. Robot and automatic laser welding technology in the process of automobile welding have greatly improved the appearance of automobile welding. With the rapid development of the automotive industry, automatic laser welding robot technology has opened a new era of automotive welding.
In the automotive manufacturing process, welding is an indispensable process on the automotive assembly line. Generally speaking, vehicle body welding mainly includes resistance welding, seam welding, carbon dioxide welding, and other methods. In the welding of parts, the welding technologies applied include flash welding, electron beam welding, electric bolt welding, pulse welding, friction welding, and so on. In recent years, automatic laser welding robot technology has emerged and developed rapidly in the world.
Unlike the current traditional spot welding process, automatic laser welding robot can achieve molecular bonding between two steel plates. Generally speaking, the hardness of the welded steel plate is equivalent to a whole steel plate, which increases the strength of the vehicle body by 30%, and the bonding accuracy of the vehicle body is also greatly improved. Of course, the practical significance of automatic laser welding robot is not limited to this. Generally speaking, the bumps from the ground when the vehicle is traveling on the road can be converted into thousands of twisting movements per minute to test the vehicle body. If the accuracy and strength of the vehicle body are not enough, the abnormal noise in the vehicle may be frequent and loud, and in serious cases, it may cause damage to components installed on the vehicle, such as the transmission, front and rear axles, or the vehicle body to break.
Automatic laser welding robot is characterized by minimal deformation of the workpiece being welded, almost no connection gap, and a high welding depth/width ratio. Therefore, the welding quality is higher than traditional welding methods. However, how to ensure the quality of laser welding, that is, laser welding process monitoring and quality control, is an important content in the field of laser utilization, including the use of various sensors such as inductance, capacitance, acoustic wave, photoelectric, and electronic computer processing to achieve projects such as weld tracking, defect detection, and weld quality monitoring for different welding objects and requirements, and the adjustment of welding process parameters through feedback control, Thereby realizing automatic laser welding. Therefore, automatic laser welding robot is a highly technical advanced manufacturing process.
