D0I:10.13374/i.issnl00It03.2009.08.014 第31卷第8期 北京科技大学学报 Vol.31 No.8 2009年8月 Journal of University of Science and Technology Beijing Aug:2009 武钢2250热轧平整机不均匀磨损及板形调控特性 杨光辉)张杰)周一中)王安苏)朱新宇) 1)北京科技大学机械工程学院，北京1000832)武汉钢铁（集团）公司热轧厂，武汉430083 摘要针对首次采用的兼有HCW和WRS两种机型特点的武钢2250热轧带钢平整机在平整过程表现出的工作辊磨损严 重且不均匀、工作辊存在特殊的弯辊调节现象等问题，由连续跟踪测试发现该平整机在轧制服役过程中存在典型的“W”形工 作辊磨损规律，通过定义磨损影响系数对W“形磨损进行了分析·研究了工作辊磨损、工作辊窜辊和弯辊对板形调控的综合 影响，并通过实验证明最终解释了热轧平整机特殊的弯辊调节现象·指出随着工作辊磨损的加剧，工作辊形成了特殊的“W” 形磨损，使工作辊在板宽范围内形成了一定量的正凸度，造成辊缝凸度减小，必须通过使用工作辊由正弯辊向负弯辊逐渐变 化的调节手段来增大承载辊缝凸度，以补偿平整过程中工作辊磨损和窜辊引起的承载辊缝凸度的减小，从而保证承载辊缝凸 度的相对稳定 关键词平整机：轧辊：板形控制；磨损：热轧 分类号TG333.7+1 Work roll non-uniform wear and shape control performance of the 2250 hot temper mill in WISCO YANG Guang-hui).ZHA NG Jie).ZHOU Yi-zhong,WANG An-su2).ZHU Xinyu2) 1)School of Mechanical Engineering.University of Science and Technology Beijing.Beijing 100083.China 2)Hot Rolling Plant.Wuhan Iron &Steel (Group)Corp-.Wuhan 430083.China ABSTRACT A 2250 hot temper mill was first adopted in WISCO (Wuhan Iron Steel (Group)Corp.)of China for wide strip production and it has both HCW and WRS mill type characteristics.During operation.some problems were found,for example,work rolls were worn badly and non-uniformly,there were especial adjusting phenomena of work roll bending force,and shape control was not satisfied.Continuous tracking measurements were carried out and the typical characteristic of W-shape work roll wear was found in a roll serving period.The influence coefficient of roll wear was proposed for analyzing the W-shape wear.The synthetical influences of work roll wear.bending force and axial shifting on the shape control were studied.The especial adjusting phenomena of work roll bending force were analyzed and explained on the base of trials.It is pointed that,with the roll wear increasing.the occurrence of W- shape work roll wear leads to the decrease in gap crown because of the positive crown of the work roll within the strip width range, and the method of gradually changing the bending force from positive to negative is to increase the gap crown for compensating the de- crease in gap crown caused by work roll wear and axial shifting.which makes the loaded gap invariant. KEY WORDS leveler;roll:shape control:wear:hot rolling 热轧平整机平整作为热轧带钢生产接近成品的 的磨损不仅缩短了工作辊的服役期，同时还会导致 一道工序，直接影响成品的力学性能、板形和表面质 工作辊辊形的变化，影响平整机的板形调控性能， 量等质量指标，热轧平整与冷轧平整及冷热轧相 武钢热轧厂2250热轧带钢平整机是由意大利 比，由于带钢表面有明显的氧化层、平整完全在无润 MIN0公司引进的国内第1台可以平整1900mm 滑和无冷却的条件下进行、轧辊的换辊周期长等工 宽度以上带钢的平整机，工作辊一端带有台阶，使用 艺特点，工作辊的磨损问题非常突出)，工作辊 辊面段与台阶段的直径差约为8mm,平整机可以 收稿日期：2008-11-28 作者简介：杨光辉(1977-)，男，讲师，博士，Emal:yanggh9246@163.com武钢2250热轧平整机不均匀磨损及板形调控特性 杨光辉1） 张 杰1） 周一中2） 王安苏2） 朱新宇2） 1） 北京科技大学机械工程学院‚北京100083 2） 武汉钢铁（集团）公司热轧厂‚武汉430083 摘 要 针对首次采用的兼有 HCW 和 WRS 两种机型特点的武钢2250热轧带钢平整机在平整过程表现出的工作辊磨损严 重且不均匀、工作辊存在特殊的弯辊调节现象等问题‚由连续跟踪测试发现该平整机在轧制服役过程中存在典型的“W”形工 作辊磨损规律‚通过定义磨损影响系数对“W”形磨损进行了分析．研究了工作辊磨损、工作辊窜辊和弯辊对板形调控的综合 影响‚并通过实验证明最终解释了热轧平整机特殊的弯辊调节现象．指出随着工作辊磨损的加剧‚工作辊形成了特殊的“W” 形磨损‚使工作辊在板宽范围内形成了一定量的正凸度‚造成辊缝凸度减小‚必须通过使用工作辊由正弯辊向负弯辊逐渐变 化的调节手段来增大承载辊缝凸度‚以补偿平整过程中工作辊磨损和窜辊引起的承载辊缝凸度的减小‚从而保证承载辊缝凸 度的相对稳定． 关键词 平整机；轧辊；板形控制；磨损；热轧 分类号 TG333∙7＋1 Work roll non-uniform wear and shape control performance of the 2250 hot temper mill in WISCO Y A NG Guang-hui 1）‚ZHA NG Jie 1）‚ZHOU Y-i z hong 2）‚W A NG A n-su 2）‚ZHU Xin-yu 2） 1） School of Mechanical Engineering‚University of Science and Technology Beijing‚Beijing100083‚China 2） Hot Rolling Plant‚Wuhan Iron ＆ Steel （Group） Corp．‚Wuhan430083‚China ABSTRACT A2250hot temper mill was first adopted in WISCO （Wuhan Iron ＆ Steel （Group） Corp．） of China for wide strip production and it has both HCW and WRS mill type characteristics．During operation‚some problems were found‚for example‚work rolls were worn badly and non-uniformly‚there were especial adjusting phenomena of work roll bending force‚and shape control was not satisfied．Continuous tracking measurements were carried out and the typical characteristic of W-shape work roll wear was found in a roll serving period．T he influence coefficient of roll wear was proposed for analyzing the W-shape wear．T he synthetical influences of work roll wear‚bending force and axial shifting on the shape control were studied．T he especial adjusting phenomena of work roll bending force were analyzed and explained on the base of trials．It is pointed that‚with the roll wear increasing‚the occurrence of W￾shape work roll wear leads to the decrease in gap crown because of the positive crown of the work roll within the strip width range‚ and the method of gradually changing the bending force from positive to negative is to increase the gap crown for compensating the de￾crease in gap crown caused by work roll wear and axial shifting‚which makes the loaded gap invariant． KEY WORDS leveler；roll；shape control；wear；hot rolling 收稿日期：2008-11-28 作者简介：杨光辉（1977—）‚男‚讲师‚博士‚E-mail：yanggh9246＠163．com 热轧平整机平整作为热轧带钢生产接近成品的 一道工序‚直接影响成品的力学性能、板形和表面质 量等质量指标．热轧平整与冷轧平整及冷热轧相 比‚由于带钢表面有明显的氧化层、平整完全在无润 滑和无冷却的条件下进行、轧辊的换辊周期长等工 艺特点‚工作辊的磨损问题非常突出［1—4］．工作辊 的磨损不仅缩短了工作辊的服役期‚同时还会导致 工作辊辊形的变化‚影响平整机的板形调控性能． 武钢热轧厂 2250 热轧带钢平整机是由意大利 MINO 公司引进的国内第1台可以平整1900mm 宽度以上带钢的平整机‚工作辊一端带有台阶‚使用 辊面段与台阶段的直径差约为8mm‚平整机可以 第31卷 第8期 2009年 8月 北 京 科 技 大 学 学 报 Journal of University of Science and Technology Beijing Vol．31No．8 Aug．2009 DOI:10．13374／j．issn1001－053x．2009．08．014