Application of laser welding method in automobile field
In the automotive industry, laser welding is usually used in the key positions of body welding and the parts with special requirements for the process, such as: for the welding of the roof and side wall panels, it can solve the problems of welding strength, efficiency, appearance and sealing. ;Used for rear cover welding to solve the problem of right-angle overlap; laser tailor welding for door assembly can effectively improve welding quality and efficiency. Different laser welding methods are often used in the welding of different body parts. The following is a list of several laser welding methods commonly used in the automotive industry.
Features of laser welding car body
1. Non-contact processing
The most important advantage of laser welding in automotive manufacturing is the advanced non-contact processing method. The traditional processing methods such as screw fastening and gluing can no longer meet the requirements of modern automobile manufacturing for precision and robustness, and the application of new materials also makes the traditional processing methods slightly inferior. Laser welding is non-contact. During processing, precision welding can be achieved without touching the product, and the technology has achieved a leap in the firmness, seamlessness, precision and cleanliness of the connection.
2. Laser welding improves the lightweight of automobiles
The use of laser welding can replace castings with more stampings in automobile manufacturing, and replace scattered spot welds with continuous laser welds, which can reduce the lap width and some reinforcements, and reduce the volume of the body structure itself, thereby reducing weight. The weight of the body is reduced to meet the requirements of energy saving and emission reduction of automobiles.
3. Improve body assembly accuracy and rigidity
There are hundreds of parts in the body and chassis of a car. How they are connected together directly affects the rigidity of the entire body. Laser welding can be used to weld almost all metal materials of different thicknesses, grades, types and grades. When connected together, the welding accuracy and assembly accuracy of the body are greatly improved, and the rigidity of the body is increased by more than 30%, thereby improving the safety of the body.
4. Laser hybrid welding improves process stability
Compared with pure laser welding technology, the use of laser hybrid welding technology can greatly improve the connection ability of sheet metal gaps, allowing enterprises to more fully utilize the process stability of arc welding in the high-speed laser welding process.
In addition, the use of laser welding can also reduce the cost of stamping and assembly in the manufacturing process of the automobile body, shorten the production cycle, reduce the number of parts, and improve the integration of the body. Laser welding parts, the welding part of the parts has almost no deformation, the welding speed is fast, and no post-weld heat treatment is required. At present, laser welding parts have been widely used, commonly used in transmission gears, valve lifters, door hinges, etc.