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四辊轧机在轧制过程中,辊系受力非常复杂,研究辊系的振动除考虑其它因素外还应考虑万向接轴附加弯矩的影响。建立工作辊耦合动力学模型,证明辊系振动存在水平和垂直方向的耦合关系,并进行数值仿真,得出万向轴倾角的存在使部分扭振转换成万向接轴弯振,进而影响辊系的动力学特性;仿真表明,万向轴倾角在一定角度下位移响应会出现分岔等现象。
During the rolling process of the four-high rolling mill, the force of the roller system is very complicated. The vibration of the roller system should also consider the additional bending moment of the universal joint shaft, besides considering other factors. The dynamic coupling model of work roll was established to prove the coupling relationship between horizontal and vertical vibration of roll system and the numerical simulation was carried out. The results showed that the existence of gimbal inclination changed some torsional vibration into universal joint bending vibration, The dynamic characteristics of the system show that the displacement of the cardan shaft at a certain angle can cause bifurcation and so on.