Formation Mechanism and Influence Factors of Roll Surface Oil Film Thickness in the Double Cold Reduction Mill

Abstract

In the double cold rolling process, the emulsion entering the roll gap during the double cold rolling process has the characteristics of high concentration and small flow rate so that the roll surface oil film thickness will affect roll gap oil film thickness, which in turn affects the rolling friction coefficient. This paper analyzes the formation mechanism and evolution process of the roll surface oil film thickness by considering the equipment and process characteristics of the emulsion direct injection application lubrication system. Then, based on the principle of fluid dynamics, the roll surface oil film thickness model in the double cold rolling process is established, and the prediction of the roll surface oil film thickness during the double cold rolling process is realized. Subsequently, the effects of five factors, such as rolling speed, work roll roughness, maximum contact stress between rolls, emulsion initial dynamic viscosity, and emulsion pressure viscosity coefficient, on the roll surface oil film thickness are quantitatively analyzed, and the corresponding influence laws are given. Finally, the relevant model and software that are applied to the 1220 double cold reduction mill have achieved good results.

PZT-based Antiferroelectric Material Based on Building Roof Film Rolling Process and Preparation Method Thereof

“…This physical quantity is complex, also known as complex dielectric constant. The magnitude of this physical quantity is related to frequency and temperature, and its functional relationship spectrum with electric field frequency and ambient temperature is called dielectric spectrum [9]. The dielectric spectrum whose frequency is higher than the dielectric spectrum is called the optical frequency dielectric spectrum, which is also called the resonant dielectric spectrum.…”