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    • December

      15

      2016
    • 1911
    Shape Control

    Shape Control

    Looking at the photo, you can see there is a shape coming out of the exit side of the mill  Shape may include stretched edges or center buckle.  The operator can see this when operating the mill.  Many shape controls are adjusted by the operator at speeds up to 7,000 FPM.  Instead of having gauges

    • December

      8

      2016
    • 2731
    DC Motors and AC to DC Drives

    DC Motors and AC to DC Drives

    DC motors can do everything AC drives can do, however, the disadvantage of a DC motor is that it requires brushes and these types of motors are open and require some maintenance.  Rolling mills usually run around the clock, and DC motors may cause downtime and are expensive to maintain such as the continuous need

    • November

      28

      2016
    • 2803
    Automation for Reverse Mill Rolling

    Automation for Reverse Mill Rolling

    A pit type coil car receives coils from the rack over a pit.  The coil car places the coil onto the single-end hydraulic expanding mandrel uncoiler.  The uncoiler is equipped with an electric motor regenerative brake or a water cooled brake system.  The uncoiler has a hold down roll and peeler blade that is adjustable

    • November

      17

      2016
    • 2807
    Hydraulic Screwdowns

    Hydraulic Screwdowns

    Practically all new rolling mills today are equipped with hydraulic screwdowns for hot or cold rolling.  A disadvantage of mechanical screwdowns is the fact that you cannot adjust accurately while the screwdowns are under pressure.  When you want to move upward with a roll gap, you always have some mechanical backlash.  Even though you can

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