In section 4, architecture and learning algorithm fuzzy neural networkof have been presented. These 4high mill rolls are known for its design, robust construction and high efficiency. Crm complex6 high reversible cold rolling mill training manual0. Apply to mill operator, finisher, plant operator and more. Automatic 2 hi cold rolling mills, rs 5000000 unit, vaid.
The improvement in the quality of the final output depends on the control strategy of centerline thickness and interstand tension. Pdf there are various reasons by which the damage in the cold rolling. Our rolling mills are available in both 2hi and 4hi roll configurations, and mills may be either work roll driven, backup roll driven, or a combination of both. A rolling mill is a complex machine having two or more working rollers, supporting rollers, roll stands, drive motor, reducing gear, flywheel, coupling gear etc. The 4hi mill rolls are fabricated with the high quality raw material. Rolling is one of the oldest procedures for the production of sheet metal.
Cold rolling mill machinery,cold rolling mill machinery. A 1011, jhilmil industrial estate, new delhi, delhi, pin 110095, india. This type of rolling mill is mainly used in offline applications for cold rolling of soft and medium strip and for a wide range of strip widths, as well as for breakdown rolling in offline applications. The homogeneous thickness and high surface quality is maintained at 6 hi reversing mill with the help of afc and agc systems. Cold rolling using roll coolant emulsion in this crm, cold rolling is done on a mecon weanunited plc controlled 3000 tonsm 4 hi reversible mill. What links here related changes upload file special pages permanent link. 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. As the name suggests the 4 hi mill employs 4 rolls, two these are the work rolls and the other two are the backup rolls. The automatic gauge control agc systems and hydraulic. A basic understanding of the mechanics of rolling mill rolls file. On one end of the spectrum, 4hi mills with work rolls are offered as small as.
The shape standard curve of the first stand of a tandem cold rolling mill was established by bai, et al. The new generation of the pilger rolling mill used for the physical modelling of the tube cold rolling. Strip thickness control of cold rolling mill with roll. Rolling mill machines metal forming 2hi4hi rolling mills. We have manufactured more than 400 such rolling mills running successfully all over india and abroad in countries like brazil, turkey, malaysia, nigeria, kenya. Cold rolling mill we fabricate a wide range of cold rolling mill machinery with the aid of advanced technology.
In a broader sense, a rolling mill is an automatic system or line of machines that performs both rolling and auxiliary operations. Type 2 hi nonreversing cold rolling mill size 16 x 24 wide age 1950s with updates coil i. These machines surpass strict quality tests, thus high performance and optimum functionality are assured. Rigid 20 high cold rolling mill machinery, high precision stainless steel rolling mill. Cold rolling mills 2hi, 4hi, 6hi, 12hi, 20hi 31 ads.
This machine provides accurate size and output desired by clients and advanced methods of production which directly reflect in higher productivity and. Rolling mill machines metal forming 2hi4hi rolling. A rolling simulator for the cluster mill, especially the 6hi x and 10hi x type mills besides the conventional 4high mill, has been developed for evaluation of rolling thin strips and foils. Torque and power chapter 3 subjects of interest tapany udomphol. Here, after an acceptable section is produced, the slitting operation will start.
The evaluation includes roll deflection, pressure of rolls in contact, roll exit thickness distribution, and so on. Carbon steel 6 hi cold rolling mill, hydraulic pressure. Cold rolling millweb guide design of controllers using various methods testing phase results and conclusion discussion testing of each method. In section 5, thickness control with roll eccentricity compensation has been proposed. Tandem cold rolling process is a nonlinear complex system with external and internal uncertainties and significant disturbances. These rolling mills, extensively used in different industrial units, are preferred for their better functional life and high tensile strength. Before deciding to implement the slit rolling method to an existing rolling mill it is essential to examine the suitability of this mill for the slit roll ing technology. Increasing demands on the quality of rolling mill products have led to great efforts to improve the con trol and automation systems of the rolling process. The control of strip position is achieved by appropriately adjusting, for example, the screw setting andor. Cold rollingis a rolling operation carried out at room temperature.
Stresses from hertzian pressure in 4 high cold mill back up rolls were measured. Robust tension control of strip for 5stand tandem cold mills. Development of cluster mill simulator for thin strip and. Secondhand 4hi united reversible rolling mill,secondhand 2hi rolling mill,4hi reversible rolling mill,4hi rolling mill,hot rolling mill,reconditioners of rolling mill,secondhand sheet metal machinery,industrial machinery,we buy sell used machines,used machine,used machinery,second hand machines,second hand machine,secondhand machinery,second hand machine tools,used machine tools.
Agc hydraulic 6 hi cold rolling mill 700mm carbon steel 390m min speed. Hot rolled coil that are cleaned at the pickling line hrp, is being processed at the cold rolling mill total 700,000 tons annual capacity to reduce the thickness to desired values. Pdf life of rolls in a cold rolling mill in a steel. Video of a 4hi cold rolling mill with automatic gauge control, commissioned by mnc. In section 3, a mathematical model has been driven for singlestand cold rolling mill. Cold rolling is commonly conducted after hot rolling when good surface quality and low thickness tolerance are needed. Rollers may be plain or grooved depends upon the shape of rolled product. The 2 hi cold rolling mill is used for making stripsheets and helps in improving the strength and forming higher tolerance. On the large end of the spectrum, 2hi mills are offered with rolls up to 16. Just a few years later, the first alligatortype 20high rolling mill was built, followed in 1958 by the first 20high rolling mill in sundwig four column sfc design. Life of rolls in a cold rolling mill in a steel plantoperation versus manufacture article pdf available in engineering failure analysis 71.
Optimization of cold rolling mill process to improve. 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. Research and development trend of shape control for cold rolling. The torque is equal to the product of total rolling load and the effective moment arm. The history of the sundwig 20high rolling mill begins in the first half of the last century, when sundwig developed a multiroll cold rolling mill in 1930. Automatic cold reversible rolling mill 4 hi 650mm agc screw down type. One stand and two frames are made from fabricated steel plates. The 4hi cold rolling mills are used for rolling of coils, sheets and plates of all types of metals and alloys like stainless steel, mild steel, brass, copper, cupronickel, aluminum etc. Modification of roll flattening analytical model based on the plane. In metalworking, rolling is a metal forming process in which metal stock is passed through one. This paper focuses on interstand tension control problem in 5stand tandem cold rolling mills. Due to different numbers of rollers, the metal coil cold rolling mill is divided into 2 hi, 4 hi, 6 hi, and 12 hi agc. Cold rolling mill equipments, cold rolling mills, cold rolling mill plant, cold rolling mill machinery, cold rolling machines, cold rolling machinery. Most steel mills have rolling mill divisions that convert the semi finished casting products.233 1189 1052 650 1471 444 939 60 143 25 1148 291 924 190 321 295 1049 844 1130 214 1076 831 727 717 125 911 1201 1462 1509 1221 1340 579 488 453 429 346 748 276 923 1232 1183 149 1122 81 1432 700