粗轧带钢头部翘曲原因分析及控制措施

造成带钢头部翘曲的主要因素包括：板坯上下表面温度差、上下轧辊摩擦系数不等、上下轧辊辊速不等、上下辊辊径不同等。采用Marc有限元软件热力耦合分析法分析了各个影响因素对热轧带钢头部翘曲的影响规律,结果表明,翘曲量随上下表面温度差、摩擦系数比、辊速比及辊径比的增大而增大,但增大趋势各有不同。同时,提出了优化轧制规程、改善加热条件、采用适当的配辊方案、合理选择速度参数等解决带钢翘曲的措施。

Cause Analysis and Control Measures of Strip Head Bending in Rough Rolling

There are many reasons resulting in the head bending of steel strip. The asymmetry in the upper and lower layers of the steel strip is the main factor, including uneven temperature, different friction, different peripheral velocity, unequal radius of the upper roll and lower roll, etc. Marc finite element analysis software was adopted to study bending of the steel strip. Two-dimension thermal-mechanical coupled models were proposed to simulate rolling of strip. The results showed that curling at the front end of steel strip was increased with the uneven temperature, friction coefficient ratio, roller speed ratio and the roller diameter ratio, but the increasing trends are different. At the same time, the measures that can solve the curling at the front end of steel strip were put forward, that were optimizing the schedules and the heating conditions, the adoption of appropriate roller programs, selecting the reasonable parameter of the speed.