Patent ID: 8356501
Filing Date: 2013-01-22
Classification: B21B

Abstract:
1. A method of supplying lubricating oil in cold-rolling by emulsion lubrication, comprising: detecting a load during rolling, an outlet side sheet speed, and a roll speed, calculating a friction coefficient from an inlet side sheet thickness and an outlet side sheet thickness obtained from a reduction schedule, and the load, the outlet side sheet speed, and the roll speed, controlling at least one of emulsion supply, emulsion concentration, emulsion temperature, and plateout length so that the friction coefficient matches a target value, wherein said controlling is performed by a method comprising: α: supply efficiency which is determined as a function of rolling rate, emulsion supply, emulsion concentration, plateout length, emulsion temperature, rolled material width or work roll barrel length, rolling load, grade of rolled material, and type of lubricating oil hemu: oil film thickness of emulsion lubrication under said specific rolling lubrication conditions hneat: oil film thickness of neat lubrication under said specific rolling lubrication conditions.