| 摘要 |
PURPOSE:To prevent the rolling trouble occuring in the looping between stands in a block mill which has a specified gear ratio for each of stands and rolls a wire rod under application of specified tension by disposing alternately flat rolls and round rolls to said mill. CONSTITUTION:Flat rolls and round caliber rolls are alternately disposed and a wire rod is rolled with such rolls in a finishing mill for wire rods which is disposed alternately with the rolls of the respective stands with each 45 deg. deviation to eliminate the need for twisting the steel material, has a specified gear ratio for each of the respective stands on account of mechanical construction, drives each stand with a single driving motor and rolls the steel material under application of slight tension. The ratio (drawing ratio) between the sectional area of the steel material in the inlet of each stand and the sectional area of the steel material in the outlet is maintained at <=13.0 and the forward slip at <=6%. The rolling is thus made possible even if the rolling mill has no caliber rolls specific to product sizes for each of the respective stands. |
