Cold Rolling

Line Quantity (Six-stand Continuous Cold Rolling Mill) 1
Strip width 700~1050mm
Material Thickness 1.8~4.0mm
Product Thickness 0.18~0.5mm
Rolling speed(max.) 800meter/min
Coil diameter(max.) 2000mm
Coil Weight(max.) 20T
Work rolls 330mm
Middle rolls 450mm
Support rolls 1150mm
Roll length 1200mm
Total power Capacity 22.5mw

It is the first six-stand continuous cold rolling mill in China. The mill consists of six stand six-roller stands in tandem, in which the strip is rolled between two work rolls. Because of the high rolling force, the work rolls needs large diameter support rolls.

The length of the steel strip is increased during cold rolling, depending on the reduction in thickness in the individual stands. The maximum speed in the last stand of the six-stand tandem cold rolling mills is 800m/min. To ensure the highest production quality and minimum tolerances, the continuous cold rolling mill in Youfu has adopted the following technologies:

  1. Minimized thickness tolerance achieved by Auto Gauge Control (AGC)
  2. Automatic material coil feeding and cold rolled coil separating
  3. Automated work roll replacement on all six stands
  4. Hydraulic roll bending system effectively controlling strip flatness

To maintain a high-speed and high-efficiency cold rolling, a mixed lubricant consisting of rolling oil and water mixture is used. In addition, the strips and rolls have to be cooled with water to absorb the heat generated during rolling. The rolling process is computer controlled to ensure effective control of production and quality