The characteristics of laser welding of automobile body

1. Non-contact production and processing

The key advantages of laser welding in automobile manufacturing are reflected in non-contact production and processing methods. Traditional production and processing methods such as screw tightening and viscose connection cannot take into account the requirements for accuracy and firmness in contemporary automobile manufacturing, and the use of new materials also makes traditional production and processing methods slightly disadvantageous. Laser welding is non-contact. In the production process, fine electric welding can be completed without touching the product. In terms of connection firmness, seamless splicing, accuracy and cleanability, the processing technology has been insisted on innovation-driven development. .

2. Laser welding improves the lightweight of automobiles

Using laser welding can choose a large number of metal stamping parts to replace cast iron parts in automobile manufacturing, and use continuous laser welding to replace scattered spot welding, which can reduce the overall width of steel bars and some lifting components, and reduce the volume of the car body structure itself. This further reduces the net weight of the car body and takes into account the regulations on energy conservation and consumption reduction of automobiles.

3. Improve the installation precision and bending stiffness of the car body

There are many kinds of parts in the body of a car and the chassis of the car. How to connect them together has an immediate impact on the rigidity of the car body. The use of laser welding can basically make all the different thicknesses and models, type and grade of metal composite materials are connected together, the precision of electric welding and the installation precision of the car body are further improved, and the bending stiffness of the car body is increased by more than 30%, thereby improving the safety factor of the car body.

4. Laser hybrid welding improves the reliability of processing technology

Compared with pure laser welding technology, the use of laser hybrid welding process can further improve the connection work ability of the gap between sheet metal parts, thereby enabling the company to more fully use the laser high-speed electric welding process reliability of arc laser welding.

In addition, the selection of laser welding can also reduce the cost of stamping dies and installation in the whole process of automobile body production, reduce the production cycle, reduce the total number of parts, and improve the overall level of the body. Laser welding parts, the welding position of the parts is almost not deformed, the welding speed is faster, and no heat treatment after welding is required. At this stage, laser welding parts have been widely selected, which are more common in transmission gears, cylinder tappets, door hinges, etc.