A serials of problems of miss position of roll,easy damage of guide and guard,scuff mark of piece were common during oval piece entering round pass by 2-h horizontal mill.

• 在用水平二辊连轧机轧制中,椭圆轧件进入圆孔型翻转时易出现错辊、导卫装置损坏、轧件划伤等一系列问题。