The causes of the head size over tolerance of large size hot rolled ribbed bars are analyzed.By improving the structure bearing bracket,this problem was resolved well. 分析了在横列式轧机轧制大规格热轧带肋钢筋时头部葫芦状尺寸超差的产生原因，通过改进轴承座结构，有效地解决了这一问题。
It is a key factor of choosing master material for cold rolled ribbed bars which affect the final product properties. 冷轧带肋钢筋母材的选用是影响冷轧带肋钢筋性能的关键因素，介绍了冷轧带肋钢筋专用母材的技术开发。
