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CVC轧机辊间接触压力分布不均,辊间压力峰值易引起严重的支撑辊不均匀磨损,甚至造成轧辊的剥落。采用影响函数法,分析了轧件宽度、工作辊横移位置、弯辊力以及支撑辊凸度对辊间压力分布的影响;研究了在应力集中最严重的横移位置时,支撑辊端部采用圆弧形倒角和抛物线形倒角时,倒角参数变化对辊间压力分布的影响规律。结果表明:CVC轧机辊间压力成S形分布,在轧辊右端存在较大的应力集中;轧件越宽,应力集中越严重;横移位置为负向最大时,辊间应力集中最严重;增加支撑辊凸度能减小辊间接触压力的峰值,但是对辊间压力分布的改善不明显;弯辊力对辊间压力有较大的影响;使用合适的抛物线形倒角和圆弧形倒角均能很好的减小辊间接触压力的峰值,并使辊间压力分布更均匀。研究结果可为CVC轧机支撑辊辊形设计提供理论依据。
CVC rolling mill roller contact pressure distribution is uneven, the pressure peaks between the rollers can easily lead to serious uneven wear of the support roller, or even cause the roller spalling. The impact function method was used to analyze the influence of rolling width, work roll shifting position, bending force and backing roll crown on the pressure distribution between rolls. When the stress concentration was most serious, When circular arc chamfering and parabolic chamfering are used, the influence of chamfering parameters on the pressure distribution between rolls is analyzed. The results show that there is an S-shaped distribution of pressure between the rolls in the CVC mill and a large stress concentration at the right end of the roll. The wider the rolling stock is, the more severe the stress concentration is. The stress concentration is the most serious when the traverse is in the negative direction. The convexity of backup roll can reduce the peak value of the contact pressure between rolls, but the pressure distribution between the rolls is not obvious. The bending force has a great influence on the pressure between the rolls. Using suitable parabolic chamfer and circular arc Angle can be very good to reduce the peak contact pressure between the rollers, and the pressure distribution between the rollers more evenly. The results can provide a theoretical basis for the roll shape design of CVC rolling mill.