二棒Ф25 mm二切分K3孔改立椭圆实践应用

Practice of Changing K3 Rolling Hole into Vertical Elliptical Hole for Two-Slice Rolling of Ф25 mm Rebar in No2 Rebar Rolling Line

分析水钢二棒线二切分轧制Ф25 mm螺纹钢,现K4与K3采用椭圆-圆孔型系统,圆孔型轧制时轧件稳定性差和容易出耳子等缺点,考虑K3孔改为立椭圆解决此问题。

The two-slice rolling of Ф25 mm rebar in No.2 rebar rolling line in Shuigang is analyzed.At present,K4 and K3 rolling holes are elliptical and round respectively.When the rolling hole is round,the stability of rolled pieces is poor and ears are easy to come out from rolled pieces.It is planned to change K3 rolling hole to vertical elliptical hole to solve the problem.