This product is innovatively developed by combining the advantages and disadvantages of relevant products at home and abroad, and has the following characteristics: 1. It requires higher stability and accuracy of stamping parts. 2. By adopting laser welding process, the power consumption of new welding process is reduced, and the work amount of welding bead grinding is reduced, which is convenient for users to realize automatic welding and grinding. 3. Comprehensive comparison of various welding and grinding costs reduces production and manufacturing costs. Provide steel column export enterprises with radiator fittings of the same European factory quality to enhance the market competitiveness of radiator export enterprises.