rough the rolling mill so that the cross section, shape and size change periodically along the length of the method. This method has the characteristics of continuous production. Rolling die with the cycle of mass production parts section blank, than free forging or forging methods can significantly increase production, reduce the metal, mold and energy consumption. Section rolling cycle in half of the 19th century for the production of wrenches, hoes and other hand tools. From the 20th century 50's, the rolling cycle method section except with the longitudinal rolling, but also with cross rolling and rolling way of producing steel balls, rollers, bushings, spindle spinning, train axis, etc. blank.
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