The article introduces forming roller pass design principle, design process and calculating formula of each layer former roller parameter in ellipse pipe rolled by turks-head roll.

介绍了采用土耳其头轧制椭圆管的成型辊孔型设计原则、设计步骤以及各架次成型辊参数的计算公式。

This article has described the function of the screw-down device of the three roll pipe mill, meanwhile the control technology for the screw-down device adjustment has been analyzed as well.

介绍了三辊轧管机压下装置的功能，并对压下装置调整的控制技术进行了分析。

Simultaneously, round steel ingots which are used to produce pipes with large diameters and thick walls are provided without modifying roll shapes of rolling pipe piercers.

同时既能提供生产大口径、厚壁管所需的圆钢锭，又不需要对轧 管穿孔机的辊型进行修改。

The paper analyzed the causes of roll displacement on mini-stretch reducing mill and the influences of displacement on external-surface quality of steel pipe.

分析了微张力减径机轧辊位移的产生原因以及对钢管外表面质量的影响。

The product quality and further processing are affected by the curvature of seamless steel pipe caused during rolling through the three-roll size reducing mill.

无缝钢管经过三辊定减径机轧制生产工序后，有时会产生弯曲，影响产品质量和深加工。