Φ140 mm浮动芯棒连轧管机组再认识

Further Discussion on Φ140 mm Floating Mandrel Mill Operation Line

简述了宝山钢铁股份有限公司Φ140 mm浮动芯棒连轧管机组的工艺流程、生产效率及生产品种调整情况,介绍了包括浮动芯棒连轧管机"竹节"控制、张力减径机CEC控制和多边化孔型、穿孔机改造、穿孔管壁厚偏心率控制效果等在内的重大工艺技术创新与发展。通过品种调整、工艺技术创新和长期数据积累,始终保持了该机组优秀的生产业绩。对于Φ180 mm以下规格连轧管机组,Φ140 mm浮动芯棒连轧管机组仍然是具有竞争力的机组。

Briefed in the paper are the main aspects of the Ф140 mm floating mandrel mill located at Baoshan Iron ＆ Steel Co., Ltd., including the manufacturing process flow, production efficiency and adjustment of the product category, etc. Also described here are some important technological innovations and development related to the mill operation line, involving ＂bulging＂ control for the floating mandrel mill proper, the CEC control and the polygonization groove of the stretch reducing mill, modification of the piercing mill, and W.T. eccentricity ratio control of the pierced shell, etc. The mill operation line is always maintained with excellent production performance owing to proper product category adjustment, technological innovation and long-term acuminated data package. Up to now, among the domestic mandrel mill plants engaged in producing pipes under Ф180 mm, the said Ф140 mm floating mandrel mill line still remains rather competitive.