All wing plates and webs are made of standard steel plates or cut strips, which are directly processed into final wing plates and webs by special equipment. The splicing is included in the flow process, and the hole making is also completed synchronously; It adopts a series of advanced technologies such as computer aided automatic cutting, high efficiency welding, rigid fixation, hydraulic forming, etc., and a precision manufacturing method without allowance; Double handpieces are adopted, φ 1.6mm double wire, special high-speed welding flux, welded under the condition of hydraulic positioning and feeding, with the speed up to 1.5~2.0m/min.
