Production Process of Spiral Welded Pipe - The Role of Forming

In the forming process, the steel strip of the required width, thickness, and material is rolled into a steel pipe of the desired specification according to the set forming process parameters using the former. The forming method is divided into upward rolling and downward rolling, and we adopt the upward rolling method. The former we use belongs to the external-clamping type in terms of its operating principle. Essentially, the principle of the former is the same as that of the leveling machine. Both involve the interaction of three rolls, causing the steel strip to bear a certain bending moment. When the bending moment overcomes the yield strength of the material, plastic deformation occurs, thereby rolling the steel strip into a steel pipe.