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首页> 外文会议>National Conference on Machines and Mechanisms >Conversion to Oil Hydraulics for Improvement in Strip Shape at Five Stand Tandem Cold Mill
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Conversion to Oil Hydraulics for Improvement in Strip Shape at Five Stand Tandem Cold Mill

机译：转换为石油液压系统，以改善条带形状的五架串联冷轧机

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The shape or flatness defects develop due to mismatch of the profiles of incoming strip and the active roll gap resulting in a transverse stress distribution and variation in elongation along the width of the strip. The roll bending and balancing system creates the positive or negative bending on the work rolls to counter the thermal crown developed on the roll during rolling and to achieve better shape of the strip. The water hydraulic system, used for roll bending system and mill auxiliary drive units at Tandem Cold Mill (TCM) of Bokaro Steel Limited (BSL), led to often failure of bending cylinders and pumps due to damage and leakage of seals. It resulted improper control of roll bending system and affected the product quality as well as productivity. In order to have a better control on shape and flatness of the cold rolled strip, the water hydraulics system had been converted to oil hydraulics for roll bending and balancing system. The new oil hydraulics system had resulted in improvement in strip shape by 18%, reduced mill delays by 25% and reduced leakages with higher viscosity hydraulic oil.
机译：由于进入条带的曲线和有源辊间隙的曲线不匹配而产生的形状或平坦度缺陷产生导致横向应力分布和沿着条带宽的伸长率的变化。滚动弯曲和平衡系统在工作辊上产生正面或负弯曲，以对轧制过程中卷上开发的热冠并实现更好的条带。用于轧辊弯曲系统和串联冷轧机（TCM）的轧辊弯曲系统（TCM）的水液压系统，导致由于密封件损坏和泄漏而导致弯曲气缸和泵的失效。它导致对辊弯系统的控制不当，并影响了产品质量以及生产率。为了更好地控制冷轧带的形状和平坦度，水液压系统已被转换为用于滚动弯曲和平衡系统的油液压系统。新型油液压系统导致条带形状的改善18％，较低的轧机延迟减少25％，粘度较高的液压油泄漏减少。

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