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针对目前MPM限动芯棒机组连轧过程由于轧制负荷和轧辊速度不匹配容易引起的轧机效率低、钢管金属堆积、拉裂、拉凹等问题,采用相对等负荷的设计方法建立数值模拟方案,研究关键的可调参数(辊缝值和轧制速度)对连轧力及金属堆拉的影响。研究结果表明:适当增大受轧制力过大的轧辊辊缝值,可以减少其轧制力,反之,可以增大轧制力,调整产生堆拉现象的对应轧辊的轧制速度,解决金属堆拉的问题。通过现场试验数据验证了有限元模型的正确性。根据优化后获得的参数,建立模型并对轧制力进行了模拟分析比较。
In view of the problems such as low mill efficiency, pile-up of metal pipe, cracking and drawing in the continuous MPM mandrel bar rolling process due to mismatch of rolling load and roll speed, a numerical simulation scheme , Study the key adjustable parameters (roll gap and rolling speed) on the rolling force and the impact of the metal stacker pull. The results show that: the appropriate increase of roll gap by the rolling force is too large, can reduce the rolling force, on the contrary, you can increase the rolling force, adjusting the stack pulling phenomenon corresponding roll rolling speed to solve the metal Heap pull problem. The field test data verify the correctness of the finite element model. Based on the parameters obtained after optimization, the model was established and the rolling force was simulated and compared.