Therefore, an optimized combination and ratio of emulsifiers, surface active agents, dispersant, other performance additives and required saponification value were selected based on the chemistry and nature of the emulsifiers to get a composition of rolling oil suitable for thin and thick gauge steel sheet rolling.
Steel is required for almost all types of industrial, construction and daily use. Over the years, rolling speeds have been continually increasing in order to raise productivity.
Positive and negative work-roll bending is employed on stands F5 and F6 for fine flatness control.
Reasonable time minutes for each additive was given to dissolve one additive before addition of the next additive. US Patent 5, describes the method and apparatus for lubricating metal strip with an oil-water emulsion.
Example of synthetic ester is TMP trioleate. Both may be expressed as absolute measurements or as relative measurements. This is important because mass flow of the material Performance of rolling oil in tandem be preserved, and the more a material is reduced, the more it is elongated.
The lubrication requirement also changes from mill to mill depending upon the final Performance of rolling oil in tandem of the rolled sheet. While waiting for the strip, the mandrel is set to a smaller diameter than normal.
The additives selected and used in the present invention are based on sulphur, phosphorous, chlorine and zinc as single component or mixture of components of above. Example  An emulsion roll coolant of blend-5 which contain 1. A new hybrid lubrication system was investigated, and it successfully enabled flexible controllability of lubrication conditions and achieved the high-speed stable rolling, while maintaining an oil consumption rate equal to that of recirculation systems.
These types of mills are commonly used to hot roll wide plates, most cold rolling applications, and to roll foils. Some technological details about the feedback control of flatness are given in. In actual site of the customers, the customer water which varies from DM water to ppm water used for the preparation of emulsion preparation and rolling operation.
The benefits of controlled rolling include better mechanical properties and energy savings. These backup rolls are larger and contact the back side of the smaller rolls.
A cluster mill has more than 4 rolls, usually in three tiers. The metastable emulsion as claimed in claim 16, which has an oil concentration in the range of 0.
Antioxidant used to prevent the conversion of ester to the fatty acid. The key to realizing the new lubricant system is control of plate-out oil film formation on the strip surface under high-speed rolling conditions. Alkyl aromatics specified are nonyl benzene, dodecyl benzene, nonyl naphthalene, and dinonyl naphthalene.
Actually a cold rolling oil emulsion requires a "metastable" emulsion stable to loose emulsion with to some extent oil or mixture of oil and cream separation characteristics.
In this study, a new hybrid lubrication system is proposed and its effectiveness is clarified. The oil can form a metastable emulsion with water and separates oil, cream or their mixture during rolling application. US Patent 4, describes a rolling oil formulation which used a dibasic acid along with other ingredients refined animal fat, minor portions of lubricity additives, antioxidants, emulsifiers and other additives to reduce the friction coefficient of the formulation.
The disadvantage to this system is the workpiece must be lifted and lowered using an elevator. Still further the oil separation, metastability and the lubrication property are not studied together properly.(3) Lubrication performance of rolling oil is improved by the addition of EP agent and emulsifier, and it becomes possible to use palm oil emulsion of which concentration is lower (15N20 %) than before ('30 %).
A composition of oil suitable for thin and thick gauge steel sheet rolling in Tandem Rolling Mills comprising a blend of emulsifier(s) / surfactant(s) / and dispersant(s) in one or more oils/fats along with different performance additives selected from extreme pressure, antiwear, anti-oxidants, antifoam and the like.
developing new cold rolling oil technology, which Development of high-performance rolling oils be operated in most cold rolling tandem mills anywhere in the world.
H o w e v e r, a new coupled tandem mill presented a severe challenge for. Tandem cold mills Cold rolling. Home Plants All Plants Tandem cold mills High performance tandem cold mill design - All in one solution for efficient cold rolling SMS group has banked 60 years of experience supplying all generations of oil film bearings to rolling mills in the steel and non-ferrous industry worldwide.
Today, you can. Quaker Chemical is dedicated to engineering the best cold rolling oils for your specific rolling process. used as a last stand cleaner in tandem mills; remove rolling debris and oxidized organic compounds generated by the rolling process. High performance synthetic ester-based rolling oil developed for high lubricity applications with.
A rolling oil dispenser at the entry side of each stand further reduces roll wear and strip-surface defects. Furthermore, the oil dispenser decreases electrical power consumption.
Laminar-flow water cooling is applied on both the top and bottom surfaces of the strip after the finishing stands.Download