Cold rolling oil pdf file

Rolling tension was constant because it could not be adjusted at each reduction. Study of oiliness agent for cold rolling oil of copper and. Rolmet 7 is made out of highly refined low viscosity base oil having ultralow sulfur and aromatic content. Hence, water oil mixtures are used with a percentage of oil in water of approx. The tandem cold rolling of metal strip is one process in a sequence of processes performed to convert raw materials into a finished product the rolling strip contact length can be approximated 6. Chapter 6 development of a thermal analysis test for predicting rolling oil performance with respect to metallic coating quality 314 in this study, the effect of twelve commercial cold rolling oil formulations on 55al43. Cold rolling can also reduce the grain size of the metal resulting in hallpetch hardening. Sendzimir, 1985 introduction at the beginning of 1985, the steel and nonferrous industries found themselves in a bind they were faced with low consumption, shrinking markets, higher costs, increased quality demands, and lower prices.

Wiping of oils and emulsion from steel strip in cold rolling mills introduction in the cold rolling process, the surface of the rolled strip is contaminated by cooling oil or emulsion and other pollutants that could considerably influence the final quality of the strip. Fundamentals of roll cooling and control of flatness at. The lubrication performance of such newly developed waterbased synthetic lubricants. The unit operates at higher pressure, which enables it to produce thicker, drier solids discharge, as well as better filtration throughout the cold rolling mill process. Friction, wear and lubrication are closely involved in the.

The protective oil, which is used to treat cold rolled sheet, has a. However, compared to the cold rolling process, high levels of lubricant degradation and wear are. Development and lubricating properties of rolling oil for. Unfortunately, this will usually become visible only after subsequent. Systems custom designed with the coolant flow rate, cleanliness and heat dissipation meeting the special requirements of the rolling mill. It can be removed by using conventional hot alkaline cleaning methods or solvents. Analysis of cold rolling oils by nmr and ir techniques article pdf available in lubrication engineering 524 april 1996 with 57 reads how we measure reads. Quaker chemical is dedicated to engineering the best cold rolling oils for your specific rolling process.

Rolling was carried out with lubricant of micro emulsion wherein water is the continuous phase and the oil dis. Rolmet 7 is a neat cold rolling oil for use in cold rolling of stainless steels requiring high degree of ba finish bright annealing, very smooth surface texture with spot free finish. It is a deformation process in which the thickness of the strip is reduced by. Measurements of surface roughness in cold metal rolling in. Development and lubricating properties of rolling oil for stainless steel cold rolling article in china petroleum processing and petrochemical technology 2. Cold rolled sheets and strips come in various conditions.

Unfortunately, this will usually become visible only after subsequent operations such as annealing, galvanising, phosphate or powder coating, etc. Steel cold rolled full hard sheet is produced to either nominal or cold rolled full hard sheet product january 28, 2016. Hot rolling is also commonly used to create railroad rails, and cold rolling is often used to make beverage cans. Traditional laboratory lubrication tests often involve neat oils. Development and lubricating properties of rolling oil for stainless.

If further processing is required to flatten the strip to apply oil or to remove offgauge material, cold rolled full hard processed sheet must be ordered. After a roll change or a mill stop rolls need some time to return to stable thermal conditions, every new bar entering the mill creates an impact. This is done for cold rolling, both of an al alloy and a low carbon steel. Therefore, during the cold rolling mill process, the friction coefficient of steel cold rolling mill equipment should be reduced to a minimum, thereby increasing the productivity of cold rolling mill. Such high loads are required that it is difficult to visualize a lubricant layer of more than. In the process of rolling the most significant aspect is the generation of heat through friction and deformation in the roll bite and in a typical cold tandem mill, work roll temperatures normally fall in the range of 55oc 70oc with strip recoil temperatures and interstand strip temperature rarely exceeding 160 oc depending on product. Saponification number determination of fats in rolling oil. Chapter 6 development of a thermal analysis test for predicting rolling oil performance with respect to metallic coating quality 3 the strip surface and the condensation and oxidation of zinc on the steel surface. As we all know, the friction is easy to produce excess power and waste of limited force. Its viscosity has a significant effect on the quantity of lubricant entering the roll bite and the control of the rolling operation. These references include speeds, tensions, forces and thickness settings. Oil company wocorol 0 series the wocorol 0 series of products is the workhorse of the wallover line of rolling oils.

Pdf analysis of cold rolling oils by nmr and ir techniques. In our daily use of cold rolling mill,we will encounter many problems, such as equipment overheating,spare parts damage,so we need to use lubricants to ensure the normal operation of cold rolling mill,because the lubricant has the function of cooling, lubrication and maintenance equipment parts and it has brought a lot of promoting cold rolling. You benefit from our 20high mills because they are packed with stateoftheart mechanics, hydraulics, electrics, and automation. Cold rolling metal oil is based on highly refined paraffinic base oil and selected additives to enhance lubricity and load carrying ability benefits. Rolling consists essentially in plastic compression of strip between moving rolls. Rolling oil formulations consist largely of mineral oils, glycerides andor synthetic esters, fatty acids, emulsifiers and additives. Ppt cold rolling oils powerpoint presentation free to. In order to prevent whipping of the work rolls, they are supported by means of intermediate. Soluble oils are metalworking fluid concentrates containing a high percentage of oil, usually greater than 50%.

Strip thickness control of cold rolling mill with roll. Introduction oil for the cold rolling of copper and copper alloys is gen. During the cold reduction of steel sheet in a rolling mill, rolling oils are used for lubrication to provide the desired steel surface. In a production flat everything is fine when the belts transport correctly and rolls are doing a fine job. The protective oil, which is used to treat cold rolled sheet, has a mineral oil base with resistance to corrosion, staining and emulsification. Rolling is the process of reducing the thickness or changing the cross section of a long workpiece by compressive forces applied through a set of rolls, as shown in figure 51. The spectra of rougrless for both the initial and rolled. Considering the above, cold rolling oil potential would be about 3500 5000 kl per annum. Pdf emulsions versus neat oils in the cold rolling of carbon. Cold rolling oil free download as powerpoint presentation. Cold rolled sheet, when not adequately protected, is susceptible to corrosion and users are advised to take the following precautions. Our products today are sold world wide for all types of metals, including carbon and stainless steels, titanium, copper, brass, bronze, beryllium copper and aluminum alloys.

Cold mills, in a wide range of types and sizes are available. This product is blended from selected base oils and high performance additives to permit excellent reduction capabilities, low oil consumption, and excellent cooling ability. In the cold rolling process, the surface of the rolled strip is contaminated by cooling oil or emulsion and other pollutants that could considerably influence the final quality of the strip. Cold rolling oils and water miscible fluids etna products, inc. Process references are optimized to provide power, force and tension distributions between the stands to produce a quality product.

Rolling is in the mixed lubrication regime, where there is both asperity contact and hydrodynamic action. In most cases emulsions are the common coolants for cold rolling, where the oil and the water form a pseudosolution. Multiroll cold mill stands are described using different terms depending on their type and manufacturer. With its low viscosity, and additive package for wetting and extreme pressure, wocorol 6000 series of products will aid greatly in shape control and other heat related problems. Cold rolling cannot reduce the thickness of a workpiece as much as hot rolling in a single pass. A basic understanding of the mechanics of rolling mill rolls file. Aluminium sheet is cold rolled from 6 mm to 3 mm with totally reduction of 50% in thickness through three passes. Some aspects on lubrication and roll wear in rolling mills diva portal. Pdf low carbon steel strips were cold rolled using various lubricants. Federal register chicago cold rolling, a subsidiary of.

Cold rolling mill productivity and product quality depend on the lubricant chemistry and composition, as well as on such physical factors as operation. Atkins department of mechanical engineering, university of michigan, ann arbor, u. Problems of cold rolling mill lubricating oil usage. The control of the fat content gives an indicator if it is aged or must be replaced by better. After being sprayed, the coolant is collected and returned to the main holding reservoir through a filtration system. Stresses from hertzian pressure in 4high cold mill back up rolls were measured years ago, the results were never published, but of high interest also, maybe later. Our cold rolling oils and water miscible fluids allow the rod or wire to be mechanically worked into its final shape by passing through a. The mechanism of lubrication in cold rolling is still controversial.

Cold rolling of steel strips with metalworking coolants mdpi. Advances in cold rolling technology sendzimir zhigh cold rolling mills in the 1980s michael g. Multiroll cold rolling mills are used to process high grade steel strip and nonferrous metal strip. Novel laboratory lubrication tests for cold rolling emulsions. The strip is in the asreceived condition before rolling, with a continuous spectrum of roughness wave lengths. Cold rolling speeds vary but modern mills operate at exit speeds as high as 3000 m per. Pdf cold rolling of steel strips with metalworking coolants. Fullhard rolling reduces the thickness by 50%, while the others involve less of a reduction. Cold mill setup csu cold mill setup calculates process regulator references and gains for rolling a specific product. In accordance with section 223 of the trade act of 1974 19 u. Dlc diamond like carbon coating for cold rolling dlc an excellent coating for cold rolling operations, including flat, foil and ring rolling, roll bending, roll forming and profile rolling. Received 7 september 1972, and in revised form 4 may 1973 s,mmaryparticular attention has been paid to the effects of roll flattening and to the. Generally speaking, rolling oils used in the production of stainless steel cold rolling can play a significant role for cooling and rust prevention. Rolls can work only properly when they are for example with rolling oil.

This quality is depending on the contents of fats in the rolling oil. The specific oil consumption for this period was 77. Advances in cold rolling technology t sendzimir inc. Depending on the product mix, rolling capacities between 200,000 and 400,000 tyear are possible in a singlestand cold rolling mill. The rolling oil contained 15% ester and about 1% alcohol in a mineral oil of viscosity 4. Both hot rolling and cold rolling are used to create sheet metal. As cold rolling of steel requires a lubricant in order to fulfil the lubrication role, oil is necessary. The rolling oil must have good antifriction quality.

Optimization of rolling mill oils evaluation using ftir. Conclusions a hot rolling oil was successfully developed in authors laboratory which was successfully commercialized in indian steel plant. Our experience with cold rolling oils dates back more than 60 years when we blended our first product for a sendzimir mill rolling stainless steel in pennsylvania. The straight cut 60 sus base oil is extremely stable and displays good natural resistance to oxidation. The cold rolling oil filter also has a minimum of moving parts, as it does not clam shell open and close, which provides better overall plant hygiene, reduced maintenance costs.