Patent ID: 6497127
Filing Date: 2002-12-24
Classification: B21B,Y02P

Abstract:
A method for supplying rolling oil for cold rolling, comprising:supplying emulsion rolling oil using both: (i) a first rolling oil supply system supplying the emulsion rolling oil to a roll and a steel sheet being rolled in a recirculation mode and (ii) a second rolling oil supply system for supplying the emulsion rolling oil to only the front and back surface of the steel sheet being rolled, wherein the emulsion rolling oil supplied by the first and second rolling oil supply systems comprise an emulsifier of a same type and concentration, and the second rolling oil supply system is controlled so that an average particle diameter of emulsion is larger than an average particle diameter of emulsion of the first rolling oil supply system; and joining the emulsion of the second rolling oil supply system, which has not stuck onto the steel sheet being rolled, to the emulsion of the first rolling oil supply system.