The pass system was optimized for inhomogeneous slitting and bad stability of three-strands slitting rolling for bar.A pre-slitting pass was added,and good effects were obtained.

• 针对棒材三线切分生产过程中切分不均匀、稳定性较差问题,对孔型系统进行了优化,增加了一个预切分道次,结果较理想。