二次冷轧机组下切水橡皮综合优化技术

Comprehensive Optimization Technology of Bottom Water-cutting Rubber in Double Cold Rolling Mill

针对以往没有考虑切水橡皮对二次冷轧机组轧制润滑性的影响,充分结合二次冷轧机组润滑系统的设备与工艺特点,在分析切水橡皮对轧制变形区油膜厚度影响的基础上,建立切水橡皮的接触压力与工作辊表面附着油膜厚度破坏剩余率的数学关系模型,对下表面切水橡皮与下工作辊接触压力进行综合优化,并将其应用到某1220二次冷轧机组的生产实践中,有效降低了带钢表面乳化液斑迹缺陷的发生率,创造了较大的经济效益,具有进一步推广应用的价值。

As the lack of consideration of water-cutting rubber(WCR)that has effect on rolling lubricity of double-cold rolling(DCR)mills,based on the analysis of the influence of WCR towards the oil thickness in rolling deformation zones,this paper fully considered the equipment and technique characteristics of DCR lubricity system and established a mathematical relationship model between the contact pressure of WCR and residual ratio of the oil thickness that covers the working roll sur face.In addition,the paper synthetically optimized the contact pressure between the bottom WCR and the beneath working roll.Applying the optimized methods into practical production of a 1220-DCR mill,the occurrence ratio of the strip surface emulsion mottle defect has been effectively reduced,which brings great economic benefits for the enterprice and is worth to be further spread.