The surface condition of the roller and the roller parts, rolling deformation area’s oil film thickness does not depend entirely on the fluid pressure, but is opposite to the contact area changes, which is consistent with the characteristics of lubrication. In the rolling deformation zone, the smaller the contact surface roughness, the larger the contact area, the smaller the thickness of the oil film, the greater the friction factor, but the better the surface quality of the rolled material when the oil film strength is large enough. When the velocity increases, the velocity effect becomes larger and the surface roughness effect decreases gradually. Under fluid lubrication, the roughness effect will disappear completely. But the size of the roughness will affect the bite into the rolling, so the contact surface roughness should be properly controlled, thereby improving the lubrication performance. The work roll roughness is controlled from 0.50 μm to 0.55 μm.
With the intensification of market competition, customers on the quality of aluminum plate put forward higher requirements. Strip surface oil seriously affect the appearance of quality. Although the cold rolling mill has taken a number of degreasing technology, the installation of a variety of degreasing device, but the aluminum strip surface degreasing is a very complex work, but also aluminum sheet processing industry to face a common problem. The same time as
At present, most of the cold rolling mill are used to block oil, oil, purge, suction, scraping oil, oil and other measures to reduce the plate with oil. But also must cooperate with the control of blanks, rolls, rolling oil, etc., in order to truly stable control of cold-rolled aluminum strip surface oil, to further optimize the surface quality. Through the above measures, slab oil is effectively controlled.
