近年来 ,用户对大断面圆棒材的质量要求日益提高。为了适应这种要求 ,日本爱知钢铁公司将大型厂轧制Φ1 3 5～Φ2 50ｍｍ的三辊式精轧机更新为高刚度二辊可逆式轧机 ,提高了棒材的质量水平。该厂生产大断面棒材时通过方一椭孔型系粗轧和 2道次精轧而成形为圆形 ,故用以往刚度低 In recent years, users of the large cross-section of the quality requirements of the bar is increasing. In order to meet this demand, Aichi Steel Works of Japan updated the three-roll finishing mill with Φ1 35 ~ Φ250mm rolling at a large mill to a high-rigidity two-roll reversing rolling mill to improve the quality of the bar. The factory production of large cross-section of the bar by a square Oval rough rolling and 2 finishing rolling and formed into a circular, so with the previous low stiffness