热轧薄带平整机支撑辊辊型优化的研究与应用

doi:10.13228/j.boyuan.issn0449-749x.20210653

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摘要某热轧薄带平整机轧辊长度为1 800 mm,带钢宽度为1 320 mm,两者相差太大,造成工作辊与支撑辊间有害接触区长度过大,在轧辊自身挠度作用下,辊间应力峰值集中于带钢边部位置。随轧制公里数延长,工作辊边部磨损加剧,不利于后期板形控制,同时会缩短轧辊使用寿命。针对热轧薄带平整机工作辊磨损不均匀问题,设计优化支撑辊辊型,通过支撑辊两端倒角设计,减小工作辊与支撑辊间有害接触区长度。并借助数值模拟技术建立平整机三维弹塑性有限元模型,模拟了不同平整工艺、不同支撑辊辊型条件下工作辊的使用情况。通过模拟结果,对比分析不同辊型的板形控制效率、凸度调节域、承载辊缝横向刚度和工作辊接触应力等指标。模拟数据表明,3种倒角支撑辊辊型改善了工作辊应力分布均匀性,有利于提高轧辊服役周期;辊间有害接触区长度明显减小;弯辊力板形调控效率由0.048 μm/kN提高到0.130 μm/kN。考虑到带钢有跑偏风险,如果支撑辊倒角插入量过大,支撑辊倒角易窜入到带钢内部,造成边部拉紧甚至断带,因此选择倒角插入量最小的V+25辊型,并应用于现场调试。现场数据表明,平整机板形调控能力明显增强,单位轧制周期内平整量显著增加。工作辊平均使用寿命由1 500 t提高至1 800 t,产品合格率由95%提升至98%以上。

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	张建雷
	张杰
	秦松
	陆佳栋
	岳重祥

关键词 ：平整机, 辊型设计, 数值模拟, 弯辊力调控功效, 有载辊缝调节域, 横向刚度, 应力分布均匀性

Abstract：The roll length of a hot rolled thin strip temper rolling mill is 1 800 mm and the strip length is 1 320 mm. The difference between the two is too large, which results in the too large length of harmful contact area between work roll and backup roll. Under the action of roll bending, the peak stress is concentrated at the strip edge. With the extension of rolling kilometers, the edge wear of work roll intensifies, which is not conducive to the later shape control and shorten the life of roll. In view of work roll uneven wear problem for hot rolled thin strip temper rolling mill, the backup roll profile curve was designed. Through the chamfer design at both sides of the backup roll, the length of harmful contact area between the work roll and the backup roll was reduced. With the help of numerical simulation, a three-dimensional elastic-plastic finite element model of temper rolling mill was established to simulate the roll usage under different temper rolling processes and roll profile parameters. It was compared and analyzed from four evaluation indexes, shape control efficiency, crown adjustment region, lateral stiffness of bearing roll gap and contact stress of work roll. The simulation results show that three roll profile improves the stress distribution uniformity of the work roll, helps to improve the service cycle of the roll. The length of harmful contact area between rollers is significantly reduced. The regulation efficiency of bending roll force is increased from 0.048 μm/kN to 0.130 μm/kN. Considering the risk of the strip running deviation, if the chamfer insertion of the backup roll is too large, the chamfer of the backup roll is easy to jump into the strip steel, resulting in edge tension or even belt breakage. Therefore, the V + 25 roll profile with the smallest chamfer insertion amount was selected and applied to the site commissioning. The field data show that flatness control ability of the temper rolling mill is significantly increased, and the roll tonnage per unit rolling cycle is significantly increased. The average life of work roll is increased from 1 500 t to 1 800 t, and the product qualification rate is increased from 95% to more than 98%.

Key words： temper rolling mill roll shape design numerical simulation regulation effect of bending roll force adjustment domain of bearing roll gap lateral stiffness uniformity of stress distribution

收稿日期: 2021-10-11

引用本文:

张建雷, 张杰, 秦松, 陆佳栋, 岳重祥. 热轧薄带平整机支撑辊辊型优化的研究与应用[J]. 钢铁, 2022, 57(4): 79-87. ZHANG Jian-lei, ZHANG Jie, QIN Song, LU Jia-dong, YUE Chong-xiang. Research and application of backup roll profile optimization for hot rolled thin strip temper rolling mill[J]. Iron and Steel, 2022, 57(4): 79-87.

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[1] 马银涛, 李宁, 杨涛. 薄板坯连铸连轧无头轧制技术的应用[J]. 河北冶金, 2021 (6): 37.(MA Yin-tao,LI Ning,YANG Tao.Application of the generation thin slab continuous casting and rolling endless rolling technology[J]. Hebei Metallurgy, 2021 (6): 37.)
[2] 康永林, 田鹏, 朱国明. 热宽带钢无头轧制技术进展及趋势[J]. 钢铁, 2019, 54(3): 1. (KANG Yong-lin, TIAN Peng, ZHU GUO-ming. Progress and trend on hot wide strip endless rolling technology[J]. Iron and Steel, 2019, 54(3): 1.)
[3] 朱丽业, 周坚刚. 薄带连铸连轧关键模型与控制技术[J]. 宝钢技术, 2018(4): 67.(ZHU Li-ye, ZHOU Jian-gang. Key models and control techniques of strip casting line[J]. Baosteel Technology, 2018(4): 67.)
[4] 王利民. 热轧超薄带钢ESP无头轧制技术发展和应用[J]. 冶金设备, 2014 (增刊1): 60.(WANG Li-min. Development and application of endless strip production(ESP) technology of ultra-thin hot-rolled strip[J]. Metallurgical Equipment, 2014 (s1): 60.)
[5] 韦军尤, 赵文博, 陈利, 等. 热轧带钢边部翘皮缺陷成因分析[J]. 连铸, 2020 (6): 48. (WEI Jun-you, ZHAO Wen-bo, CHEN Li, et al. Causes analysis of surface upwarping defects on hot rolled strip[J].Continuous Casting, 2020 (6): 48.)
[6] 马超, 孙丽钢, 张玮, 等. 包钢CSP热轧卷板纵裂缺陷分析与控制[J]. 连铸, 2020 (4): 54. (MA Chao, SUN Li-gang, ZHANG Wei, et al. Analysis and control of longitudinal crack on hot rolled coil in CSP plant of Baotou Steel[J].Continuous Casting, 2020 (4): 54.)
[7] 张旭辉, 王举金, 孔祥玉, 等. Q195热轧带钢凝固冷却过程非金属夹杂物生成热力学及工业实践[J]. 连铸, 2020 (1): 61. (ZHANG Xu-hui, WANG Ju-jin, KONG Xiang-yu, et al. Thermodynamics and industrial practice of non-metallic inclusions formation during solidification and cooling of Q195 hot rolled strip[J].Continuous Casting, 2020(1): 61.)
[8] 孙宁波. 极薄带钢搭接焊热影响区断带问题分析与改善[J]. 中国冶金, 2021, 31(7): 112. (SUN Ning-bo. Analysis and improvement for strip breakage in HAZ of lap welding of ultra thin strip steel[J]. China Metallurgy, 2021, 31(7):112.)
[9] 周东生, 冯庆晓, 李化龙. 薄带铸轧产品特性及应用进展[J]. 连铸, 2020(6): 21. (ZHOU Dong-sheng, FENG Qing-xiao, LI Hua-long. Product characteristics and application progress of thin strip casting and rolling[J].Continuous Casting, 2020 (6): 21.)
[10] 李芳. 薄带钢热连轧活套起套控制研究及优化[J]. 中国冶金, 2017, 27(7): 62. (LI Fang. Research and optimization of raising-up control of looper of thin strip hot rolling line[J]. China Metallurgy, 2017, 27(7): 62.)
[11] 焦海涛, 蔺晓雪, 谢信祥, 等. 轧制工艺对薄带铸轧无取向硅钢组织性能的影响[J]. 轧钢, 2021, 38(5): 18.(JIAO Hai-tao, LIN Xiao-xue, XIE Xin-xiang, et al. Effect of rolling process on microstructure and properties of strip casting non-oriented silicon steel[J].Steel Rolling, 2021, 38(5):18.)
[12] 白少金, 孙广兴. 日钢2 150 mm热轧带钢产线薄板坯轧制技术的研究[J]. 轧钢, 2021, 38(3): 98.(BAI Shao-jin, SUN Guang-xing. Study on thin slab rolling technology in 2 150 mm hot strip rolling line of Rizhao Iron and Steel Co., Ltd[J]. Steel Rolling, 2021, 38(3): 98.)
[13] 徐文军, 东占萃, 郭维进, 等. 四辊轧机主传动系统轴向窜动问题分析与改善[J]. 中国冶金, 2020, 30(8): 69. (XU Wen-jun, DONG Zhan-cui, GUO Wei-jin, et al. Analysis and improvement of axial movement of main drive system of four high rolling mill[J]. China Metallurgy, 2020, 30(8):69.)
[14] 班胜利. 提高冷轧平整机组板型控制能力的措施[J]. 有色金属文摘, 2015, 30(4): 110.(BAN Sheng-li. Measures to improve the shape control ability of cold rolling temper mill[J]. Nonferrous Metals Abstract,2015, 30(4): 110.)
[15] 白振华,徐纪栓,董航哲,等. 平整轧制过程中工作辊粗糙度衰减模型[J]. 钢铁, 2019, 54(4): 43. (BAI Zhen-hua,XU Ji-shuan, DONG Hang-zhe, et al. Roller roughness attenuation model in leveling rolling process[J]. Iron and Steel, 2019, 54(4): 43.)
[16] 宋光义,杨荃,王晓晨,等. 热轧带钢平整机工作辊磨损规律[J]. 钢铁, 2017, 52(9): 54. (SONG Guang-yi,YANG Quan,WANG Xiao-chen,et al. Work roll wear law for hot strip temper mill[J]. Iron and Steel, 2017, 52(9): 54.)
[17] CHEN X L, YANG G, ZHANG Q D, et al. Varying contact back-up roll for improved strip flatness[J]. Engineering Structures, 1996, 18(10): 786.
[18] 刘云峰,王东,彭兴东.冷轧MR T-4钢镀锡原板表面划伤的原因和控制[J].上海金属,2021, 43 (6):7.(LIU Yun-feng,WANG Dong,PENG Xing-dong. Cause and control of scratch on cold-rolled uncoated tinplate base of MR T-4 steel[J]. Shanghai Metal,2021, 43 (6):7.)
[19] 于洋, 王畅, 王林, 等. 热轧板带生产中氧化的基本特点及麻点缺陷的成因与控制[J]. 轧钢, 2021, 38(5): 1.(YU Yang, WANG Chang, WANG Lin, et al. Basic characteristics of oxidation and formation mechanism and control of salt and pepper defects in hot rolled strip production[J]. Steel Rolling, 2021, 38(5): 1.)
[20] 马兵智, 齐春雨, 娄德诚, 等. 薄宽带钢平整机支撑辊辊型设计[J]. 轧钢, 2020, 37(1): 53.(MA Bing-zhi, QI Chun-yu, LOU De-cheng, et al. Research on roll shape design of temper rolling mill for wide and thin gauge strip[J]. Steel Rolling, 2020, 37(1): 53.)
[21] 王东城, 马庆龙, 刘宏民. 冷轧带钢平整机支撑辊辊型优化技术的研究[J]. 钢铁, 2009, 44(8): 56.(WANG Dong-cheng, MA Qing-long, LIU Hong-min. Study of backup roll contour optimization for cold strip temper rolling mill[J]. Iron and Steel, 2009, 44(8): 56.)
[22] 郑均干, 张青树. 梅钢1 420平整机组辊型及轧制工艺参数优化[J]. 机械工程与自动化, 2012(4): 113.(ZHENG Jun-gan, ZHANG Qing-shu. Optimization of roll profile and rolling process parameters of 1 420 temper mill in Meisteel[J]. Mechanical Engineering and Automation, 2012 (4): 113.)
[23] 张喜榜, 王凤琴, 李彬, 等. 热轧平整板形与轧机表面调控特性研究[J]. 轧钢, 2016, 33(4): 13.(ZHANG Xi-bang, WANG Feng-qin, LI Bin, et al. Study on flatness control and surface improvement in hot rolling temper mill[J]. Steel Rolling, 2016, 33(4): 13.)
[24] 杨超, 寇劲松, 刘鹏, 等. 棒材高精度轧制工艺与实践[J]. 轧钢, 2021, 38(5): 116.(YANG Chao, KOU Jing-song, LIU Peng, et al. High precision rolling technology for bar and its practice[J]. Steel Rolling, 2021, 38(5): 116.)
[25] 王永明, 吴迪, 郭利宏. 钢轨全万能轧制技术研究与实践[J]. 轧钢, 2021, 38(5): 109.(WANG Yong-ming, WU Di, GUO Li-hong. Study and practice of rails rolled by full universal finishing pass[J]. Steel Rolling, 2021, 38(5): 109.)