Thick rolled, when large or larger barrel diameter of the workpiece material strength, a small amount should be decreased by the movable roll and several roll forming.
When rolling rolls are thick, large diameter barrels or workpieces with a large rife material strength, a small amount of downward rolling rollers shall be reduced and molded by multiple rolls.
When rolling thick and large diameter cylinder or workpieces with large material strength, a small amount of down moving roll shall be used and rolled for several times.<br>