本文介绍了19号槽帮钢的断面特征、产品孔型设计特点以及轧制中金属在孔型中变形情况。提出了获得关键部位中间爪部小台尺寸的几项措施。分析了产品轧制缺陷及消除缺陷的方法。对成品孔采用万能机架的优缺点及其设计要点作了充分的评述。 This paper introduces the section features of No. 19 grooved steel, the design features of the product holes and the deformation of the metal in the hole during rolling. Several measures were proposed to obtain the size of the small claw in the middle part of the key part. The product rolling defect and the method of eliminating the defect were analyzed. The advantages and disadvantages of the finished hole using universal rack and its design points made a full comment.