rolling mill horsepower calculation

  • Fundamental concept of metal rollingmtixtl

    Fundamental concept of metal rolling 1) The arc of contact between the rolls and the metal is a part of a circle. 2) Example Calculate the rolling load if steel sheet is hot rolled 30 from a 40 mm-thick slab using a 900 mm-diameter roll. The slab is 760 mm wide.

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  • Some Basics of Rolling and Rolling MillsIspatGuru

    May 30 2013 · Rolling mills are designed with different types of roll configurations (Fig 1). Rolls configuration can be reversing (rolls can rotate in forward and backward direction) or non reversing (Rotation of rolls is in a single direction). In the reversing types of rolls for reversing the rolls must be stopped reversed and then brought back up to the

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  • Roll pass designDefinitionsSlideShare

    Jan 08 2014 · Design a new product to roll on an existing mill. Creating the rolling plan calculating the power and roll loads and analyzing the suitability of the equipment to provide the necessary power and torque and withstand the rolling loads. The units of power are horsepower ( HP ) per ton per hour or HP hour / ton. The x-axis is elongation. To

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  • Some Basics of Rolling and Rolling MillsIspatGuru

    May 30 2013 · Rolling mills are designed with different types of roll configurations (Fig 1). Rolls configuration can be reversing (rolls can rotate in forward and backward direction) or non reversing (Rotation of rolls is in a single direction). In the reversing types of rolls for reversing the rolls must be stopped reversed and then brought back up to the

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  • ROLLING

    is 300 mm and the rolls rotate at 100 rpm. Calculate the roll force and the power required. For annealed copper it has a true stress of about 80 Mpa in the unstrained condition and at a true strain of 0.223 true stress is 280 Mpa. FOUR HIGH ROLLING MILL. PROBLEMS AND DEFECTS IN ROLLED PRODUCTS Porosity Cavity Blow Holes occurred in the

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  • Rolling of Metals Process and Principles (With Diagram)

    The rolling process is shown in Fig. 2.1 Rolling is done both hot and cold. It is accomplishes in rolling mills. 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. Rollers may be plain or grooved depends upon the shape of rolled product.

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  • (PDF) Methodology for Calculation of Rolling Load and

    Rolling load calculation 3.1 Properties of Material to be used for Hot Rolling MaterialA36 Mild Steel UTS400 Mpa Yield Strength250 Mpa Elongation20 Carbon0.26 Density7800 kg/m 3 Poisons ratio0.26 Shear Modulus79.3 Gpa Table 1 Effect of Temp on UTS PASSES TEMPARATURE ( ̊C) ULTIMATE TENSILE STRENGTH

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  • A brief history of metal rolling for sheet and plate

    A brief history of metal rolling for sheet and plate products. On the first day of our Aluminium Rolling Technology Course I run a session entitled "Machinery and Process Overview". Part of this covers the history of metal rolling from the first known drawings of a mill to the state-of-the-art rolling

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  • Rolling processesAl-Mustansiriya University

    Rolling processes 5-1 introduction 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 (5-1). Fig. (5-1) Most rolling is carried out by hot working called hot rolling owing to the large amount of deformation required.

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  • Understanding Rolling Process in Long Product Rolling Mill

    Nov 27 2015 · Calculation of roll force is important because calculation of torque and power in a rolling mill is based on calculation of roll force. Accurate prediction of roll force for grooved rolling is considerably more difficult than predicting the geometry of the rolling stock. There are essentially three problems present during the rolling as well

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  • 3B(2) Deformation of Rolling Mill

    The mill modulus is 500-1 000 ton/mm for plate rolling mills and ton/mm for cold rolling mills. The larger the diameter of the back-up rolls the higher the mill modulus. A rolling force of the order of 1 000 tons is generated during rolling so that mill deformation of more than 1mm occurs.

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  • Roller Mill Maintenance00CPM

    Roller mill maintenance can be broken down into three general areas rolls bearings and drives. Maintenance requirements may vary from application to application but are most directly linked to the horsepower connected to the equipment. Those machines with more horsepower connected will require more maintenance and attention. The

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  • 3B(2) Deformation of Rolling Mill

    The mill modulus is 500-1 000 ton/mm for plate rolling mills and ton/mm for cold rolling mills. The larger the diameter of the back-up rolls the higher the mill modulus. A rolling force of the order of 1 000 tons is generated during rolling so that mill deformation of more than 1mm occurs.

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  • Load Analysis and Driven Power Calculation (Symmetrical 3

    Calculation of driving power 3.1 Lower roller drive moment. The lower roller of the plate rolling machine is the driving roller and the driving torque on the lower roller is used to overcome the deformation torque T n1 and the friction torque T n2.. In the process of steel plate rolling the deformation capabilities which stored in AB section of steel plate (see Fig 1a and Fig 2) is 2Mθ the

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  • AC Replacement for DC Mill-Duty MotorsTMEIC

    determined the horsepower and speed capa-bilities. This will be discussed in more detail later when comparing the AC mill-duty motor speed and torque capabilities against the standard and DC mill-duty motors supplied by motor manufacturers. Voltage Source — The standard calls for 230 VDC ratings but suitable for operation at 500

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  • Calculating Mill Drive RPMs Is Your Mill Up to Speed

    Calculating Mill Drive RPMs Is Your Mill Up to Speed By Robert A. Sladky Vice President Tube Mill Engineering Many "W" style mills that have the ability to shim up the bottom driven shafts in each section to maintain metal line after tooling is reworked and are many times also equipped with a individual motor drive in each of the three sections as illustrated below.

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  • Horsepower FormulaScience Struck

    Horsepower (denoted with hp) is a unit of power which is defined as the rate at which work is done per unit time.The unit has nothing to do with horses other than the fact that it has an etymological and historical origin in comparison of machine power with animal power nceptualized by James Watt it was first used in measuring the power output provided by steam engines in comparison with

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  • A determination of the total roll separating force during

    rolling of bimetallic rods. A subject of the paper is a development of analytical model of rolling force during rolling of bimetallic rods. Re-sults of calculation by analytical model are compared with results of FEM model and experimental data. Therefore the present study has derived theoretical for-

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  • Method of load calculation of electrical drives of rolling

    During manufacturing of heavy strips and plates from difficult-to-form steel grades on sheet and wide-strip rolling mills there is a problem of exact calculation of power parameters of rolling.

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  • The calculation of rolling forceInnoval Technology

    The calculation of rolling force. When manufacturing sheet products it s important to understand the rolling force. This is because you need it to set the appropriate roll gap on the mill accounting for the stretch of the stand. The prediction of rolling force can be challenging due to the large number of inter-connected process variables

    Read More
  • Roll pass designDefinitionsSlideShare

    Jan 08 2014 · Design a new product to roll on an existing mill. Creating the rolling plan calculating the power and roll loads and analyzing the suitability of the equipment to provide the necessary power and torque and withstand the rolling loads. The units of power are horsepower ( HP ) per ton per hour or HP hour / ton. The x-axis is elongation. To

    Read More
  • Rolling (metalworking)Wikipedia

    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 to make the thickness uniform and/or to impart a desired mechanical property. The concept is similar to the rolling of dough.Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its

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  • Fundamental concept of metal rollingmtixtl

    Fundamental concept of metal rolling 1) The arc of contact between the rolls and the metal is a part of a circle. 2) Example Calculate the rolling load if steel sheet is hot rolled 30 from a 40 mm-thick slab using a 900 mm-diameter roll. The slab is 760 mm wide.

    Read More
  • Rolling Mill Startup Torque Calculation

    excell sheet calculation torque speed power for rolling mill. high performance hot rolling mills high . x pact for hot rolling mills pools our special process . emergency power

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  • Method of load calculation of electrical drives of rolling

    During manufacturing of heavy strips and plates from difficult-to-form steel grades on sheet and wide-strip rolling mills there is a problem of exact calculation of power parameters of rolling.

    Read More
  • rolling mill calculation

    The Calculation of Roll Force and Torque in Hot Rolling Mills. Equations are derived for the normal roll pressure specific roll load and torque in hot rolling mills using the condition for plastic deformation in rolling derived by Orowan together with von Kármán s equation of

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  • ROLLING

    is 300 mm and the rolls rotate at 100 rpm. Calculate the roll force and the power required. For annealed copper it has a true stress of about 80 Mpa in the unstrained condition and at a true strain of 0.223 true stress is 280 Mpa. FOUR HIGH ROLLING MILL. PROBLEMS AND DEFECTS IN ROLLED PRODUCTS Porosity Cavity Blow Holes occurred in the

    Read More
  • (PDF) On the Optimization Procedure of Rolling Mill Design

    This article proposes URC Technology to optimize the mill design from model software calculation to mill window layout and even to level-2 optimal set up. It is a combination of software and

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  • (PDF) Roll Pass design for hot flat rolling of plain

    As much as 15–20 of GDP of industrialized nations comes from metal forming industry. 1.1. Roll pass design It is a set of methods for determining the dimensions shape number and type of arrangement of rolling mill passes. It also includes the calculation of pressing forces and

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  • HOT ROLLING PRACTICEAn Attempted Recollection

    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. 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

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  • A BASIC UNDERSTANDING OF THE MECHANICS OF

    only under so called "normal rolling conditions" and even these change continuously with progressive wear in the contact zone. Besides "normal rolling conditions"a stable theoretical assumptionmills experience many different changes in rolling conditions. After a roll change or a mill stop rolls need some time to return to stable

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  • The calculation of rolling forceInnoval Technology

    The calculation of rolling force. When manufacturing sheet products it s important to understand the rolling force. This is because you need it to set the appropriate roll gap on the mill accounting for the stretch of the stand. The prediction of rolling force can be challenging due to the large number of inter-connected process variables

    Read More
  • A BASIC UNDERSTANDING OF THE MECHANICS OF

    only under so called "normal rolling conditions" and even these change continuously with progressive wear in the contact zone. Besides "normal rolling conditions"a stable theoretical assumptionmills experience many different changes in rolling conditions. After a roll change or a mill stop rolls need some time to return to stable

    Read More
  • HOT ROLLING PRACTICEAn Attempted Recollection

    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. 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

    Read More
  • Solved A Rolling Mill Has Two Rolls Of Diameter = 20 In

    A rolling mill has two rolls of diameter = 20 in. Each roll can exert a maximum force of 250 000 lb. The mill (set of two rolls) has a total maximum power of 80 hp. It is desired to reduce the thickness of a 2 in thick billet by the maximum possible draft (ho-he) in one pass. The starting billet is 8

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  • Horsepower FormulaScience Struck

    Horsepower (denoted with hp) is a unit of power which is defined as the rate at which work is done per unit time.The unit has nothing to do with horses other than the fact that it has an etymological and historical origin in comparison of machine power with animal power nceptualized by James Watt it was first used in measuring the power output provided by steam engines in comparison with

    Read More

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