Natural molding method: Natural molding method is also called the roller forming method (CFE). The characteristics of this molding method are that in the process of forming, the roll group is configured along the vertical bonding edge to control the edge extension. At the same time, the roll groups are restrained from the outside.
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).
