1. a, Beams processing: the aluminum alloy material is heated to 700-720 ° C for smelting, the aluminum alloy melt is poured into an aluminum alloy round ingot, homogenization treatment: heating to 455-470 ° C, holding for 24 hours; After sawing, it is heated to 410-430 ° C and then incubated for 2-4 hours, subjected to free forging treatment and die forging treatment, and then quenched, then subjected to artificial aging treatment and finally finished by metal cutting machine; at the same time, coil processing: The aluminum alloy material is heated to 700-720 ° C for melting, the aluminum alloy melt is cast into an aluminum alloy ingot, and the aluminum alloy ingot is processed into a coil by extrusion;

2. Welding two Beams at both ends of the coil by means of argon arc welding;

3. after the surface of the welded parts is oxidized, the pan head is obtained.