Nnhot rolling mill pass design pdf

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. A rolling mill guide for use in rod mills, merchant mills, and the like, comprising a guide box, two opposed blocks mounted in the guide box on opposite sides of the mill pass line and having longitudinally extending channels in their adjacent faces, separate metal plates bridging the respective channels and shaped to flt closely against the. Guiding equipment, steel rolling mill guiding equipment. Watch how an optimum roll pass design leads to the distribution of loads across rolls, ensuring better rolling quality and reduction in specific power consumption. Pdf numerical simulation in roll pass design for bar rolling. In rolling mill, the accuracy and quality of the strip exit hickness aret very important factors.

The coilers are indispensable important equipment in hot strip rolling line. In most modem hot rolling procedure, the strips are coiled up in continuity. Automated procedure for roll pass design article pdf available in journal of materials engineering and performance 183. Steel frame hangar complete design drawings cad dwg,dxf and pdf steel frame hangar complete design drawings. Designing a rolling mill machinery general discussions i. Rolling mills are facilities that carry out a series of processes including rolling the billets, blooms, slab and beam blanks extracted from the reheating furnace into the prescribed size and correcting any bending, cutting them into given lengths, then piling or bundling as needed for shipment. Roll pass design rpd is a principal factor that determines process efficiency, product quality and resource consumption. Development of a rational roll pass design for a rolling mill. Roll wear is amongst the key criteria for devising a rational roll pass design. We pride ourselves for developing the highest quality roll pass design to ferrous and nonferrous hot rolling mills for production of the most challenging sections. Jul 29, 2010 roll pass designing in continuous bar mill billet size area finished size area of finished bar coefficient of elongation no. Operation of rolling mills schweitzer rolling technology. The course will provide the participants with the theoretical knowledge, practical skills, and confidence to deal with daytoday roll pass, quality, and production issues. Numerical simulation in roll pass design for bar rolling article pdf available in metalurgija sisak then zagreb 541.

Metal forming nonuniformity and efficiency coefficients, which determine the degree of working of a metal microstructure in rolling of section bars, are used as performance criteria. Pdf roll pass design for hot flat rolling of plain carbon steel tariq. Planetary roll mill rolls are arrangement in the form of planetary movement. In this webinar mathworks engineers demonstrate the benefits of using simulink as a platform for modeling and control system design for a sheetmetalrolling application. Steel sections are generally rolled in several passes, whose number is determined by the ratio of initial input material and final cross section of finished product. 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. Extend the size range of products already rolled on an existing mill. Roll pass design in continuous bar mills linkedin slideshare.

Standards, roll pass design, layout, equipment and guiding system and discuss the. See more ideas about rolling mill, jewelry tools and metal jewelry. Redesigning passes of an existing product to roll the same cross section out of a different material. Development of detailed groove drawings, roll barrel layouts, roll stress calculations, rolling power, torque and separating force predictions, and roller setup sheets. For mills that use rollers to crush grain or stone, see roller mill. Complete set of structural design drawings of an industrial building.

Roll pass design using slitting passes roll pass design in case of ribbed bars with longitudinal slitting is based on the application of special shaping passes socalled cuttingin passes in the final stage of the rolling process 1,6,7. Rolling mill all ove r the world have started using this grade getting wide benefits. Tandem roll mill continuous arrangement of rolls are used for continuous rolling. The accuracy and speed of working and roll life are all related to his design and choice of ma. The mcdonald mill is not just a set of plans but a fantastic invention. Cluster roll mill a number of rolls are used in conjunction. Roll pass design generally means the cutting of grooves in the roll body through which steel to be rolled is made to pass sequentially to get the desired contour and size. I once saw a book on rolling mill design that had the angle of reductionhp calculations in it. Coiling is the last key production step in hot rolling procedure, which is done by the coilers. There are two types of rolling process flat and profile rolling. A model has been used to calculate pass design of a finishing train of a continuous billet mill producing 60 mm square billet. In flat rolling the final shape of the product is either. However, the concept of a true rolling mill is first found as. A comparison of roberts formulation with the experimental method rajinder singh me deptt.

Roll pass designing in continuous bar mill billet size area finished size area of finished bar coefficient of elongation no. This is a revolutionary new machine that in any other era would have been patented and made the inventor huge profits. Rolling in slitting passes is of great significance considering succeeded. The leading provider of efficient wire rod mill technology with morgan vee notwist mills, red ring stands, morgan reducingsizing mills, controlled cooling systems and. The process considered is a rolling of round bar in roughing mill group which consist of four passes. Wicon the versatile tool for long products rolling simulation, optimization, process design and product quality. 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.

Thus, the groove geometry, roll pass schedule and rolling mill parameters and temperature can be optimised for best product quality and yield. Figure 1 shows a fishbone diagram that classifies the rolling system components for. Mar 09, 2018 watch how an optimum roll pass design leads to the distribution of loads across rolls, ensuring better rolling quality and reduction in specific power consumption. Hot rolling is among the most widely used manufacturing techniques.

Pdf a new method for roll pass design optimisation sead. The normal and average center distance from the center of one roll to the center of o. Effect of pass schedule and groove design on the metal deformation. Their main task is to coil the strip out of the finishing mill, and then transport to the next. Roll pass designs projects typically follow the following timeline. Strip thickness control of cold rolling mill with roll. Computeraided roll pass design for continuous billet mill. 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. Factbox 1 abb and rolling mills footnote 1 a pass is one deformation step consisting of the different phases threading, rolling at constant speed, deceleration and tailout of the strip through the mill.

Report on best available techniques bat in the german. This continuous mill consists of 25 stands arranged in 5 groups and is able for rolling. In this paper, we design pi controller in outer loop. With over 30 years experience with hot rolling mills and oems of rolling mill equipment, we have the knowhow to solve your problems and develop new products for you. Nov 30, 2016 hot rolling is among the most widely used manufacturing techniques. Process overview the mill layout for the investigation of the tbar rolling process was determined based on a common arrangement for hbeam rolling as shown in fig. Turnkey solutions for complete hot rolling mills design process of rolling mills. Multipass rolling experiments simulating the rolling passes with a universal roughing mill and an edger mill were carried out. I agree thomas, the smaller the rolls the steeper the climb. Rolling of soft metals like gold, silver and perhaps lead was first performed by goldsmiths for making jewelry. The present work examines the computer aided roll pass design of round bars. Hot rolling practice an attempted recollection saral dutta. As long rollings technology pioneers, primetals technologies applies knowledge and experience to supply your ferrous and nonferrous mills best solution. And manager for wire rod mill mr nils degerman for their support blem solving.

Thumb rules in rolls pass design pass groove angle bottom angle relief radius bottom radius box pass 810 deg 10 diamond pass 90 deg 18 square pass 45 deg around 90 deg 5 oval pass 60 deg 30 deg 5 round pass 60 deg 60 deg 0. However, rolling mills are major resource consumers. Simulating a multistage rolling mill process, part 1. For example, providing a design for 8 mm x 3 rebar on a mill that already rolls 10 mm x 2 rebars.

Operation of rolling mills rolls rolls are the tools of the rolling trade and the way they are used to execute their duty of deforming steel is in many cases largely determined by the roll pass designer. Ugi engineering works private limited is one of the most prestigious manufacturer, exporter, supplier, and consultant of high grade hot rolling mill. Roll pass design methods includes determining the dimensions, shape, number and type of arrangement of rolling mill passes. A new technique is developed to analyze the roll pass design of a section rolling mill. May 18, 2015 thumb rules in rolls pass design pass groove angle bottom angle relief radius bottom radius box pass 810 deg 10 diamond pass 90 deg 18 square pass 45 deg around 90 deg 5 oval pass 60 deg 30 deg 5 round pass 60 deg 60 deg 0.

The subject of the paper is a study of the material behaviour during hot rolling. Automated procedure for roll pass design on researchgate, the professional network for scientists. To realize high accuracy in the strip exit thickness, the automatic gauge control agc system is used. The work diameter of the rolls of the twohigh rolling stand was. Rolling mills are facilities that carry out a series of processes including rolling the billets, blooms, slab and beam blanks extracted from the reheating furnace into the prescribed size and correcting any bending, cutting them into given lengths. In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The hot rolling process the primary function of the hot strip mill is to reheat semifinished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process. 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. Rolls in a hot mill have to withstand radial loads up to 12 mn and high temperatures.

A pass schedule is a series of values for the pass, such as thickness, speeds and forces presets. I have tried to give an idea that what pass designing actually is. Rolling mill pass design crusher mills, cone crusher, jaw. Roll pass design for improved flexibility and quality in wire rod. 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. However, the concept of a true rolling mill is first found as a sketch in the notebook of leonardo da vinci. The hot rolling process california steel industries.

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. Because of roll eccentricity in backup rolls, the exit thickness deviates periodically. Jing, limei 2001 rolling mill roll design, durham theses, durham university. The computer simulation of the process shows that the local plastic deformations which appear in the material are extremely large. The system of roll passes intended for the production of a round bar 28 mm in diameter is used as an example to analyze. Besides normal rolling conditions a stable, theoretical assumption mills experience many different. Therefore, it is important to optimise rpd including the selection of roll. The roll pass design of a whole rolling line for round bars can be carried out successfully using the actual pc. Oct, 2012 i once saw a book on rolling mill design that had the angle of reductionhp calculations in it. During this time we will cover the basics of metal deformation, the rolling of steel, and roll pass design concepts. 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.