Research on Intelligent Manufacturing Processes for Double-Welded Hot-Rolled Square and Rectangular Hollow Sections and Structural Members

At present, the production processes of square and rectangular steel tubes mainly involve welding four steel plates together or cold forming. The welded square and rectangular tube components have problems such as large amounts of longitudinal and electroslag welding work and suboptimal mechanical performance at beam-column joints. The cold-formed square and rectangular tube components have issues like cold work hardening at the four corners of the cross-section and poor weldability at the cold-formed parts. Additionally, the above production processes of square and rectangular tube components are complex and not suitable for high-efficiency intelligent manufacturing. Focusing on intelligent manufacturing of steel structures, a production process for double-welded seam hot-rolled square and rectangular tube components is proposed. The square and rectangular tube components are fabricated by welding two equal-thickness hot-rolled channel steels together, with separate partition plates and other processes, and are manufactured efficiently using intelligent manufacturing methods. This paper mainly introduces the technical requirements of the square and rectangular tube profiles, the design of structural nodes, and the intelligent manufacturing process, providing guidance for the development of such components.