Production of block having ribs made from welded round pipes and rims comprises forming round pipes from strip material forming welding seam, deforming round pipes into oval pipes and further processing

摘要

Production of a block having ribs made from welded round pipes and rims comprises forming the round pipes (1) from a strip material (4) forming a welding seam (2), deforming the round pipes into oval pipes so that the welding seam lies on the large axis (d1) of the oval pipes, moving the oval pipes so that the axes containing the welding seam are aligned parallel, aligning expanding tools on the position of the oval pipes and on the position of the welding seam and expanding the oval pipes against the rims in the ribs using the expanding tools to produce round pipes with a final diameter.