Φ100mm自动轧管机组穿孔方头缺陷的产生及消除方法

对Φ１００ｍｍ自动轧管机组穿孔方头缺陷产生的原因进行了分析。方头的形成是由顶杆位置过后，轧辊径向颤动及穿孔变形时椭圆度系数过大等原因造成的。同时提出了相应的解决方法。

FORMING OF THE SQUARE-END DEFECT OF TUBE DURING Φ100mm PLUG PIPE MILL OPERATION AND COUNTERMEASURES

The paper presents an investigation into the elements responsible for formation of the squareend defect of tube during the Φ100 mm plug pipe mill operation,The result shows that the said defect is caused by such elements as over rear-positioned plug bar,radial vibration of the roll and over-big ovality factor during shell deformation under piercing,etc,Accordingly countermeasures are proposed.