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改进钢管生产工艺的最主要的目的之一是提高钢管壁厚与外径的精度。苏联车里雅宾斯克轧管厂与全苏函授机器制造学院及乌拉尔管材科学研究所在140自动式轧管机组上进行了旨在提高钢管精度的各种分析研究。穿孔机采用阶梯形轧辊孔型,导板的轧制带凸起成平台状,顶头鼻尖即在此平台区内,这能增加轧辊入口锥处的局部压下量和总变形量并将顶前椭圆度从1.12减小到1.07。顶头位置也可在导板平台区移
One of the most important purposes to improve the steel pipe production process is to increase the precision of the steel pipe wall thickness and outer diameter. The Chelyabinsk rolling mill plant in the Soviet Union and All-Soufer Faculty of Machine-Building and Ural Institute of Pipe Materials carried out various analytical studies aimed at improving the accuracy of steel pipes on the 140 automatic mill units. Piercing machine with a step-shaped roll pass, the guide plate rolling into a convex platform, the nose tip that is in this platform area, which can increase the roll entrance cone at the local reduction and total deformation and the top anterior elliptical Degree decreased from 1.12 to 1.07. Head position can also be moved in the guide plate platform