Laser brazing is also called laser filler wire brazing. In the welding process, the laser beam is used as the heat source, and the focused beam is irradiated on the surface of the filler wire. Under the continuous heating of the beam energy, the wire melts to form a high temperature liquid metal. The liquid solder is used to wet the base metal, fill the joint gap and diffuse with the base metal to realize the connection.

It has the following characteristics:            

1. Local heating, parts are not easy to produce heat damage, heat affected area is small, and welding can be carried out without damaging the base metal.            

2. It can be used for negative defocusing heating, melting bandwidth, no splashing, natural wetting after melting of filler, good weld appearance quality, and can be used for steel plate welding in appearance area.           

3. The laser beam is easy to be divided into two parts: half lens, reflector, prism, scanning mirror, etc., which can realize multi-point symmetrical welding at the same time.           

4. The light beam is easy to transmit and control, and the welding torch and nozzle do not need to be replaced frequently, which significantly reduces the auxiliary time of shutdown, and has a high load coefficient and production efficiency.        

5. It is easy to realize automation and can effectively control the beam intensity and fine positioning.          

The application of laser brazing technology in welding not only makes the product more beautiful and improves the sealing, but also significantly improves the strength of the welding area and improves the safety performance of the vehicle.