The roll forming process is mainly processed by plastic movement of materials into various shapes of shafts, valve cores and special fasteners. Rolling deformation is a line contact, which is carried out continuously and stepwise, and the required deformation force is small, and one stroke can produce one or several workpieces. Compared with the cutting and grinding processes, the roll forming process not only has high production efficiency, saves materials, but also has high product strength and stable quality. This process is especially suitable for processing workpieces with long and short machining difficulties, especially for annual production. Millions of high-volume products are most advantageous with the roll forming process and the most economical benefits.