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目前中国热轧厂采用的四辊轧机普遍存在工作辊夹住板带轴向的移动现象,简称“叼板窜辊”弊端。按“微尺度静定”设计理论分析得知,轧辊轴承座与机架窗口立柱之间的微小间隙约1 mm(后随衬板磨损加大)易使辊系处于静不定状态,进而产生辊间错位及交叉工况,因此在特定条件下会发生叼板窜辊现像。原有设置辊间偏移距布放辊系的设计忽视了控制微小间隙的必要性,经分析发现,叼板窜辊原因的关键在于科学控制“不得已间隙”。通过开发智能衬板,保证轧机轧辊平行、定位稳定、可靠运转,消除叼板窜辊带来的能量消耗,充分利用轧机的高档能力,采纳大压下轧制新工艺,生产高强度新品种精品,实现4/6辊热冷轧机改造和更新换代,达到降本増效的目的。
At present, the four-high rolling mill used in China’s hot rolling mill generally has the phenomenon that the work roll clamps the axial movement of the strip, and is referred to as the shortcoming of “shifting plate roller”. According to the theory of “micro-scale statics” design theory, it is found that the slight gap between the roll chock and the upright post of the frame is about 1 mm (the wear of the liner increases) Resulting in misalignment between rollers and cross-working conditions, so under certain conditions will occur Diaoguan channeling roll phenomenon. The original design of the roll offset between the rollers has neglected the necessity of controlling the small gap. According to the analysis, it is found that the key to the reason of the roller shifting is the scientific control “the last resort ”. Through the development of intelligent liner to ensure that the mill roll parallel to the positioning of stable and reliable operation to eliminate Diaoguan channeling roll bring energy consumption, take full advantage of the high-end mill capacity to adopt a large pressure rolling new technology to produce high-strength new varieties of fine , To achieve 4/6 roll hot and cold rolling mill transformation and upgrading, to achieve the purpose of reducing costs.