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中轧区辊缝调整不当易使轧件在进一步扭转及后续轧制过程中产生表面折叠,为了减少折叠缺陷的产生,确定了高线中轧区合适的宽展模型,在满足孔型充满度条件下计算出辊缝调整的极限区间。参照辊缝调整区间,建立合理的有限元模型,模拟轧件在高线中轧区轧制变形过程,根据模拟结果,分析轧件变形及金属局部流动状况。研究发现,当中轧区辊缝超出调整范围时,金属横向变形过大,轧件容易产生耳子。辊缝调整范围在实际应用后发现可以有效减少表面折叠。
Misalignment of the roll gap in the rolling zone tends to cause surface folding of the rolling stock during further twisting and subsequent rolling. In order to reduce the occurrence of folding defects, a suitable wide- Under the conditions calculated roll gap adjustment limit interval. According to the adjustment range of the roll gap, a reasonable finite element model is established to simulate the rolling deformation of the rolling stock in the high rolling line. Based on the simulation results, the deformation of the rolling stock and the local flow of the metal are analyzed. The study found that the roll gap in the rolling area exceeds the adjustment range, the metal deformation is too large, easy to produce rolling ears. Roll gap adjustment range found in practice can effectively reduce the surface fold.