全浮動芯棒連軋管機(jī)組軋件與芯棒速度及摩擦系數(shù)研究(下)

Study on Workpiece vs Mandrel Velocity and Friction Factor Relationship of Fully-floating Mandrel Mill(Part Ⅲ)

摘要: 對寶山鋼鐵股份有限公司的全浮動芯棒連軋管機(jī)組各機(jī)架軋制壓力、芯棒運(yùn)動速度等一系列參數(shù)進(jìn)行了綜合測試,獲得了軋件速度曲線,并探討了軋件與芯棒速度之間的關(guān)系;分析了軋件與芯棒間的摩擦狀態(tài),并推算出兩者間在各機(jī)架處的摩擦系數(shù)（為0.033～0.074）,該系數(shù)沿軋制方向呈增大的趨勢。以上結(jié)果為清楚認(rèn)識連軋管過程中金屬變形規(guī)律和芯棒摩擦作用機(jī)理提供了依據(jù)。

Abstract: An overall measurement of all the relevant parameters of each roll stand of the fully-floating mandrel pipe mill located at Baoshan I & S Co., Ltd., including rolling force and mandrel velocity, etc., resulting in the workpiece speed characteristics.Furthermore, the workpiece vs mandrel velocity relationship is studied, and the friction condition between the workpiece and the mandrel is analyzed.It is identified that the friction factor of the two at each individual roll stand is 0.033~0.074, and the factor goes up along the rolling direction.The conclusion provides basis for identifying the metal deformation law and the mandrel friction effect mechanism during the mandrel mill rolling process.