组合式轧辊轧制过程的稳定性分析

Stability analysis of assembled milling rolls in milling process

采用MAC软件计算组合式轧辊辊芯与辊套温度场,建立相应的传热方程与热应力分析模型及其边界条件。研究结果表明:与轧件接触的轧辊表面的温度在开始轧制时迅速上升,随着轧制过程的进行,温度趋于呈稳定周期性变化,温度达到稳定的时间大约为2h;当轧辊旋转到与轧件接触处,温度达到最高,最高温度约为300℃,此时辊套轧辊结构稳定,据此生产的组合式轧辊在轧制过程中性能优越。

A new method based on MAC was proposed to analyze the temperature and stress fields of assembled rolls, and the heat transfer equation and thermal stress model was set up. The results indicate that the temperature at the surface of roller contacted with bar increases rapidly at the beginning of rolling, and it tends to periodically vary along with the rolling process, and this process will cost about 2 h. The temperature of the roller surface reaches the top point which is about 300℃ when the roller is circumrotated to position contacted with bar. New assembled milling rolls have excellent result in milling process.