Rolling mill design pdf

Pdf design and fabrication of rolling mill irjet journal. I agree thomas, the smaller the rolls the steeper the climb. In this webinar mathworks engineers demonstrate the benefits of using simulink as a platform for modeling and control system design for a sheetmetal rolling application. If the temperature does drop below this temperature the material must be reheated before more hot rolling. The stable and reliable rolling of thin strip in the finishing mill of linked casting and rolling processes such as arvedi esp endless strip production and compact strip production csp, or in conventional hotstrip mills, has increased the requirements for precise massflow and thickness control. Project included electrical engineering and installation for danieli supplied equipment and siemens supplied electrical equipment, with smi steel acting as their own general contractor. Outline of reversing cold rolling mill 1 outline of reversing cold rolling mill and rolling method as illustrated in figure 1, a reversing cold rolling mill is comprised mainly of a mill proper, a winding machine payoff reel, an entry winding machine entry tension reel and delivery winding machine delivery tension reel. The design provides a plain body part which serves for the early rolling. Different types of rolling roll mills used by steel roll. After surveying the various types of hot rolling mill units for heavy ingots and their evolution, the author selects for description certain examples of progressive design. Complete set of structural design drawings of an industrial building. Thanks to a new generation of precision machining, pepetools ultra series rolling mills are stronger than ever. I once saw a book on rolling mill design that had the angle of reductionhp calculations in it. The plant began producing large ingots, weighing 60 tons and more, in 19351936, which allowed to manufacture large backup rolls for rolling mills.

Coiling is the last key production step in hot rolling procedure, which is done by the coilers. With this new design, mills were able to produce 15 times more output per day than with a. The customers demands are high on the products flatness, which is controlled by the. Because of exceptionally high requirements to the quality of metal used for production of cold mill rolls, retooling and modernization of the production plant were carried out by the 1940. This book discusses as well the different types of rolls for various rolling mills, including blooming, plate, sheet, sheet bar, small section, heavy product, skin passing, and cold rolling mills. Pdf this article describes a scientific design procedure that begins from a given product mix to a customized rolling mill. In 1783, a patent was issued to henry cort for his use of grooved rolls for rolling iron bars. Their main task is to coil the strip out of the finishing mill, and then transport to the next.

Jul 02, 2014 design analysis of universal joint shaft for rolling mills 1. The design of the long product rolling mill is required to provide right solutions for the required performance requirements which include high speed production, microstructure qualities of the product, and shortest changeover time from one product to other product etc. Two basic models the force model and the crownshape model dominate major tasks of mill design. Technical characteristics of projected multifunctional mill allow producing the hot rolled and coldrolled thin strips of steel and alloys, copper strips of thickness of. Materials are manually charged and discharged and the final products are rods, strips etc. Tandem rolling mills the tandem rolling mills comprises of a set of two or three strands of roll set in parallel alignment. Rolling mill classification rolling mill is used to reduce successively the thickness of the metal strip as per the requirement. The rolling unit accommodates a single pass design from stand 1 through the last stand of the finishing block. Used in a combination bar and rod mill, both the morgan rod reducingsizing mill and morgan bar reducingsizing mill are integrated to work with the same singlefamily pass design. This furnace is mainly used for heating up scrap, small ingots and billets weighing 2 to 20 kg for re rolling. A mechanism, commonly called a roller table, directs the work piece to the rolls, and another roller table for. Failure of chocks in a cold rolling mill is basically because of higher stressed generated during start up and shut down condition of rolling mill so for a design of chocks for a cold rolling mill it is essential to know the maximum load acting on a chock to prevent from a failure. Automated procedure for roll pass design article pdf available in journal of materials engineering and performance 183.

Hot rolling mills are used for mass thickness reduction at high temperatures, whereas the cold rolling mills are used as secondary rolling operations to attain more precise dimensional and mechanical properties. From rolling mills to forming tools, from polishing machines to planishing tools, durston tools can meet your workshop needs. Pepetools engineered a unique housing that maximizes durability and increases strength, all while decreasing overall mass. The layout of a rolling mill varies, from a simple single stand mill to several stands positioned either side by side or in a line. Roll pass design is a set of methods for determining the dimensions, shape, number, and type of arrangement of rolling mill passes. The paper investigates the main issues of design and modeling of. Pdf proposal for 10 tph tmt bar rolling mill rizwan. It is generally known that the most unique feature of universal joints is misalignment capabilities of 15 or greater. Large amount of flexibility is available in modern long products rolling mills. A four high rolling mill is used for the hot rolling of armor and other plates as well as cold rolling of plates, sheets and strips. Design and function of cvc rolls as a flatness actuator in.

Rolling models serve as theoretical foundation of mill design. Rolling of steel in a modern long product rolling mill. Development of a rational roll pass design for a rolling. Design and selection of universal joints for rolling mills. Basics of rolling a rolling mill consist of several, at least two rolls cylindrical or nearly cylindrical bodies which are termed as roll and which rest in bearings at their ends. A mechanism, commonly called a roller table, directs the work piece to the rolls, and another roller table for handling the pieces emerging out of the roll. Designing a rolling mill machinery general discussions i. A free powerpoint ppt presentation displayed as a flash slide show on id. With this new design, mills were able to produce 15 times more output per day than with a hammer. In most modem hot rolling procedure, the strips are coiled up in continuity. This article focuses on ball and rod mills excluding sag and ag mills. The first in the ussr rolls for hot rolling mills were produced from ingots weighing up to 40 tons at uralmashplant in 1934. In metalworking, rolling is a metal forming process in which metal stock is passed through one.

As a consequence, the market is demanding a rolling mills revamp to mitigate roll neck breakage in the fillet ring area under severe loading conditions. Designing a rolling mill machinery general discussions. A designer of rolling mills will find here the principles for selection and calculation of roll neck bearings. Although their concepts are very similar, they are not discussed here. Simulating a multistage rolling mill process, part 1. 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.

Although cort was not the first to use grooved rolls, he was the first to. Their mounting and maintenance is also covered in detail. Featuring rolling and processing primetals technologies. Initially the mills were classified into classes, designed for purposes as follows. Rolling mills are often divided into roughing, intermediate and finishing rolling cages. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. 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. Optimization of schedules on rolling mills by multicriteria dynamic. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users.

This technology as applied to bar mills enables the production of two or more bars from one billet. A continuous pass might be possible through each one with the change in the direction of the material. Basics of rolling a rolling mill consist of several, at least two rolls cylindrical or nea. The choice of bearing selection can play an important and.

This includes all rotating mills with heavy grinding media loads. Larger rollers reduce this but put more metal in contact with the rolls,increasing the force on the roll bearings and more contact absorbs more heat from the metal. Design and function of cvc rolls as a flatness actuator in a cold rolling mill keywords flatness, actuators, cvc, cluster mill, cold rolling, strip summary when cold rolling thin steel strips with high tensile strength, reversible cluster mills are used. Many mill rolls manufacturers provide quality tandem rolling mills to various industries. During shape rolling, an initial billet round or square with edge of diameter typically ranging between 100140 mm is continuously deformed to produce a certain finished product with smaller cross section dimension and geometry.

Our rigorous attention to detail both in terms of design, components and manufacturing means we consistency create products that are second to. See more ideas about rolling mill, jewelry tools and metal jewelry. Design and selection of universal joints for rolling mills abstract the application of universal joints has significantly increased in steel and aluminum rolling mills. Hence there is a need for compact rolling mills with a low cost which can roll very small thickness plates. This is a revolutionary new machine that in any other era would have been patented and made the inventor huge profits. Oct, 2012 i once saw a book on rolling mill design that had the angle of reductionhp calculations in it.

In this work a rolling mill is designed to roll a maximum. The final chapter explains the purpose of roll pass design to ensure the maximum output at minimum cost as well as to reduce the roll wear to a minimum. Besides normal rolling conditions a stable, theoretical assumption mills experience many different. Santanu chakraborty, in treatise on process metallurgy. Using an efficient algorithm developed for mdp, the optimum design problem. High mill efficiency can be maintained without regard. There is a scope to improve a chock design both theoretically as well as using finite element analysis which will help manufacturer to minimize a failure rate of rolling mill and also maintain a. Mill, motor and the whole process of roll pass design.

Two high rolling mill rolling is a bulk deformation process in which the thickness of the work is reduced by compressive forces exerted by two opposing rolls. This paper describes how the digitalization of information collection and distribution will lead to a revolution in longproduct rolling mill control systems. Ppt rolling mill powerpoint presentation free to view. It has been observed that more failure of rolling mill of this type is related to chock which make an entire failure or rolling mill assembly. Jun 18, 2014 roll pass design is an essential part of long product rolling process, since the long products are rolled between the shaped rolls in the long product rolling mills.

Steel frame hangar complete design drawings cad dwg,dxf and pdf steel frame hangar complete design drawings. This is the first in a threepart webinar series that will highlight the use of mathworks products for modeling and control of a multistage rolling mill process. Fag rolling bearings in rolling mills schaeffler group. The coilers are indispensable important equipment in hot strip rolling line. Equipment consisted of a new 256 cooling bed, 1200 h.

Outline of reversing cold rolling mill 1 outline of reversing cold rolling mill and rolling method as illustrated in figure 1, a reversing cold rolling mill is comprised mainly of a mill proper, a winding machine payoff reel, an entry winding machine entry tension reel and. After surveying the various types of hot rolling mill units for heavy ingots and their evolution, the author selects for description certain examples of progressive design from his own recent exper. The slit rolling technology is a combination of special roll pass design with designated guide guiding is our business equipment to shape and longitudinally separate the incoming billet into two or more. Eight optimization steps pass schedule generation, work roll determination, backup roll diameter, mill type selection, mill window layout, mill housing dimension. Most steel mills have rolling mill divisions that convert the semi finished casting. Through this a design of the low cost rolling mill is proposed and then the mill has been fabricated as per the design and the estimated cost. Modern rolling practice can be attributed to the pioneering efforts of henry cort of funtley iron mills, near fareham, england. The rolling mills complex was proposed to include a light and medium merchant mill with breakdown group of stands for rolling blooms into billets and an intermediate inline heat compensating furnace. Photographs of a glass ended laboratory ball mill show action of ball mass within the mill. Pdf on the optimization procedure of rolling mill design. Common types of grinding mills include ball mills and rod mills.

A selection of publications covering rolling mill bearing arrangements and fundamental subjects in bearing arrangement engineering, such as dimensioning, mounting and dismounting, lubrication and maintenance is given in the list on page 52 of this publication. Suitable course for mechanical engineers, steel mill supervisor, technicians and those are interested about physics, math, metallurgy. The normal and average center distance from the center of one roll to the center of o. Roll pass design is an essential part of long product rolling process, since the long products are rolled between the shaped rolls in the long product rolling mills. This complete design can be used either as a ready to go solution, as an example or even as a template for future similar projects.