Manufacturing method of tubular crane lifting beam

The invention discloses a manufacturing method of a tubular crane lifting beam, which comprises the following steps: S1, cutting a sectional material according to drawing information of lifting beams of different models, and placing the sectional material on a conveyor belt; s2, the conveying belt transfers the sectional material to a first hole site cutting position, and walking wheel holes are machined; s3, the conveying belt continues to transfer the sectional material to a second hole site cutting position, and a mounting hole and a mounting through groove are machined; s4, the conveying belt continues to transfer the profile to the tailor-welding position, and internal rib plates are welded to form a lifting beam; and S5, the surface of the lifting beam is subjected to corrosion prevention, then boring is conducted, and finally surface paint spraying is conducted. The manufacturing method is simple, convenient and easy to operate, compared with a traditional method, the machining time can be shortened by