.512. 北京科技大学学报 第29卷 击峰值同样极为重要. [4]曹建国，张杰，陈先霖，等。热轧带钢板形板厚耦合特性变化 (5)采取防护措施后，可以有效防止裂纹扩展 机理与参数求解.北京科技大学学报.2001,23(5)：452 [5]镰田正诚.板带连续轧制.北京：冶金工业出版社，2002 造成主轴断裂后对周围设备产生伤害，在无裂纹情 [6]日本钢铁协会.王国栋，吴国良，译.板带轧制理论与实践 况下，加固轴与原传动轴相比缩颈部位最大扭矩应 北京：中国铁道出版社，1990 力可相对减少9.94%.但是加固改进后的传动轴最 [7]Takano.Endless hot strip rolling at Kawasaki Steel Chiba Works. 高应力区仍然在原裂纹附近，因此该局部区域仍然 Iron Steel Eng.1997.74(2):41 是传动轴的薄弱环节. [8]邹家祥.轧钢机械.北京：治金工业出版社，1989 [9]Salganik V.Mathematical modeling of roll load and deformation in 参考文献 a four-high strip mill.J Mater Process Technol.2002.125/126; 695 [1]Cao JG.Zhang J.Chen X L.et al.Control of roll contour for [10]Whight J.Mill drive system to minimize torque amplification. strip profile and flatness in hot rolling//44th Mechanical Working Iron Steel Eng:1976,53(7):58 and Steel Processing Conference Proceeding-Florida.2002:1001 [11]Knight C W.Hardy S J.Lees A W,et al.Influence of roll [2]Ginzburg V B.High quality Steel Rolling:Theory and Practice. speed mismatch on strip curvature during the roughing stages of New York:Dekker Ine,1993 a hot rolling mill.J Mater Process Technol.2005.168:184 [3]陈火红，Marc有限元实例分析教程.北京：机械工程出版社， 2003 Breakage mechanism and application of the bottom main drive spindle in a R2 roughing mill during hot rolling by finite element analysis WEI Gangcheng),CAO Jianguo,ZHANG Jie,DAI Jiangbo2) 1)Mechanical Engineering School.University of Science and Technology Beijing.Beijing 100083.China 2)Wuhan Iron and Steel Company.Wuhan 430083,China ABSTRACI With special supporting structure for heavy loading,a bottom main drive spindle s breakage ap- pears in strip production of the R2 roughing stand in a 2250 mm hot strip mill.Based on the Marc software package,a 3-dimensional finite element model was constructed to analyze the combined bend and torsion stress state of a bottom main drive spindle in the R2 roughing mill.Under different loading situations of torsion,bend- ing or both them,the results of finite element analysis show that the stress in the special supporting area is greater 60%than that in other normal areas of the spindle in different computing cases.It is also shown that torque is the main reason leading to cracking and breakage of the spindle.The maximum stress in the main drive spindle supporting area after replacing original hollow structure with improved solid structure is reduced by 21%0.The reinforced main drive spindle was successfully applied in production of the roughing mill. KEY WORDS hot rolling:roughing mill;main drive spindle;finite element method击峰值同样极为重要． （5） 采取防护措施后‚可以有效防止裂纹扩展 造成主轴断裂后对周围设备产生伤害．在无裂纹情 况下‚加固轴与原传动轴相比缩颈部位最大扭矩应 力可相对减少9∙94％．但是加固改进后的传动轴最 高应力区仍然在原裂纹附近‚因此该局部区域仍然 是传动轴的薄弱环节． 参 考 文 献 ［1］ Cao J G‚Zhang J‚Chen X L‚et al．Control of roll contour for strip profile and flatness in hot rolling∥44th Mechanical Working and Steel Processing Conference Proceeding．Florida‚2002：1001 ［2］ Ginzburg V B．High-quality Steel Rolling：Theory and Practice． NewYork：Dekker Inc‚1993 ［3］ 陈火红．Marc 有限元实例分析教程．北京：机械工程出版社‚ 2003 ［4］ 曹建国‚张杰‚陈先霖‚等．热轧带钢板形板厚耦合特性变化 机理与参数求解．北京科技大学学报‚2001‚23（5）：452 ［5］ 镰田正诚．板带连续轧制．北京：冶金工业出版社‚2002 ［6］ 日本钢铁协会．王国栋‚吴国良‚译．板带轧制理论与实践． 北京：中国铁道出版社‚1990 ［7］ Takano．Endless hot strip rolling at Kawasaki Steel Chiba Works． Iron Steel Eng‚1997‚74（2）：41 ［8］ 邹家祥．轧钢机械．北京：冶金工业出版社‚1989 ［9］ Salganik V．Mathematical modeling of roll load and deformation in a four-high strip mill．J Mater Process Technol‚2002‚125／126： 695 ［10］ Whight J．Mill drive system to minimize torque amplification． Iron Steel Eng‚1976‚53（7）：58 ［11］ Knight C W‚Hardy S J‚Lees A W‚et al．Influence of roll speed mismatch on strip curvature during the roughing stages of a hot rolling mill．J Mater Process Technol‚2005‚168：184 Breakage mechanism and application of the bottom main drive spindle in a R2 roughing mill during hot rolling by finite element analysis WEI Gangcheng 1‚2）‚CAO Jianguo 1）‚ZHA NG Jie 1）‚DAI Jiangbo 2） 1） Mechanical Engineering School‚University of Science and Technology Beijing‚Beijing100083‚China 2） Wuhan Iron and Steel Company‚Wuhan430083‚China ABSTRACT With special supporting structure for heavy loading‚a bottom main drive spindle’s breakage ap￾pears in strip production of the R2roughing stand in a2250mm hot strip mill．Based on the Marc software package‚a3-dimensional finite element model was constructed to analyze the combined bend and torsion stress state of a bottom main drive spindle in the R2roughing mill．Under different loading situations of torsion‚bend￾ing or both them‚the results of finite element analysis show that the stress in the special supporting area is greater60％ than that in other normal areas of the spindle in different computing cases．It is also shown that torque is the main reason leading to cracking and breakage of the spindle．The maximum stress in the main drive spindle supporting area after replacing original hollow structure with improved solid structure is reduced by 21％．The reinforced main drive spindle was successfully applied in production of the roughing mill． KEY WORDS hot rolling；roughing mill；main drive spindle；finite element method ·512· 北 京 科 技 大 学 学 报 第29卷