随着近代工业的发展,铁道车辆、汽车、轴承等工业部门所需要的轴承环、轮箍、齿圈、车轮等环形零件的数量急剧增长,而且对其精度的要求也越来越高。这些环形零件,过去一般都是在压力机或锤上自由锻、胎模锻或模锻成形,或用各种断面形状的条料焊接成形。1851年德国Alfred Krupp公司开始用辗压方法制造环形零件。关于车轮的辗压方法,1906年在日本已开始运用。1919年美国的William Todd—Steel公司开始采用车轮辗压机及2000吨油压机制 With the development of modern industry, the number of ring-shaped parts such as bearing rings, wheel bands, ring gears and wheels required by industrial sectors such as railway vehicles, automobiles and bearings has rapidly increased, and the requirements for its accuracy have also become higher and higher. These ring-shaped parts, the past are generally free-forging presses or hammers, forging or die forging, or with a variety of cross-sectional shape of the strip welding. In 1851 Germany Alfred Krupp companies began to use rolling method of manufacturing ring parts. On the wheel rolling method, 1906 in Japan has begun to use. In 1919 William Todd-Steel of the United States began to use the wheel rolling machine and 2000 tons of hydraulic mechanism