Metodu tal-iffurmar naturali: Il-metodu tal-iffurmar naturali jissejjaħ ukoll il-metodu tal-iffurmar tar-rombli (CFE). Il-karatteristiċi ta 'dan il-metodu tal-iffurmar huma li fil-proċess tal-iffurmar, il-grupp tar-roll huwa kkonfigurat tul it-tarf tat-twaħħil vertikali biex jikkontrolla l-estensjoni tat-tarf. Fl-istess ħin, il-gruppi ta 'roll huma mrażżna minn barra.
Extend the edge as a compressed deformation form to absorb, so that the forming process of the tanded steel is close to the forming method of natural bending shape. Therefore, it is a forming method that can prevent the edge extension and absorb marginal extension, which is suitable for the inhabitant medium -caliber thin wall tube (D>400mm).
