Five Stand Rough Forming Tube Mill Machine ZY16 Φ8-18mm HF Welded Steel Pipe

Problem Trying to form tube in too few passes overworks the strip edges, causing edge strain, thinning at the weld line, springback and inconsistent weld gaps. Cause Heavy forming in a single pass concentrates bending at the edges, so the strip yields unevenly, edges thin and the weld gap varies along the pipe, which the welder cannot correct. Solution The ZY16 spreads the bend across five rough forming stands, gradually closing the strip toward an open-tube profile. Each