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连铸机的辊子是主要的工作部件,数量大、寿命短。由于断辊现象时有发生,破坏了连铸机作业的连续性,大大降低了生产效率。现场调查结果表明,辊子断裂的直接原因是在拉坯过程中,辊子横截面内产生了非均匀分布的周期变化的温度场,由于内部材料之间相互约束,使各部分材料的热膨胀受到限制,从而产生了热应力;由于热应力水平很高,从而导致了辊子的断裂。要讨论辊子承受热应力的大小,首先必须对辊子横截面内的温度场进行分析计算。本文将用有限元法求解辊子温度场和热应力的结果,进行分析和研究。
Caster roll is the main working parts, a large number of short life. Due to the phenomenon of broken rollers have occurred, undermining the continuity of continuous casting machine, greatly reducing production efficiency. The field survey results show that the direct cause of the roller fracture is the nonuniform temperature distribution in the cross section of the roller. Due to the mutual restraint of the internal materials, the thermal expansion of each material is limited, Resulting in thermal stress; due to the high level of thermal stress, which led to the rupture of the roller. To discuss the size of the roller to withstand thermal stress, the temperature field in the cross-section of the roller must first be analyzed and calculated. This paper will use the finite element method to solve the roller temperature field and thermal stress results for analysis and research.