27.6. What is the role of molding?

Under the action of the former, the steel strip of the required width, thickness and corresponding material is rolled into the steel pipe of the required specification according to the set forming process parameters, and the forming method is divided into two types: up-winding and down-winding, and we use the up-winding method. In essence, the principle of the former and the leveling machine is the same, both under the interaction of three rollers, so that the steel belt bears a certain bending moment, and the bending moment overcomes the yield strength of the material, resulting in plastic deformation, so as to roll into steel pipe.