Fundamentals of Rolling

Fundamentals of Rolling presents the theoretical knowledge of longitudinal rolling in a comprehensive procedure. This book discusses the basic theory and principles of rolling processes. Comprised of seven chapters, this book begins with an overview of the three principal methods of rolling, including longitudinal, transverse, and skew rolling processes. This text then illustrates the constrained yield stress distribution along the gap due to work hardening on cold rolling between ideally smooth rolls. Other chapters consider the range of application of various types of rolls and show the basic dimensions of a roll. 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. 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. This book is a valuable resource for rolling mill engineers.

ForewordPreface1. Phenomena Occurring during Plastic Working of Metals 1.1. Plastic Working by Rolling 1.2. Fundamental Phenomena Occurring in Plastic Working 1.3. Deformation of Single Crystals and Polycrystalline Aggregates 1.4. Cold Work and Strain-hardening of Metal 1.5. Recrystallization 1.6. Hot Working2. Fundamental Principles of Plastic Working of Metals 2.1. Symbols, Formula, and Definitions 2.2. Constancy of Volume and Laws of Plastic Deformation 2.3. Stress-Strain Relationships and Condition of Plasticity 2.4. Yield Stress 2.5. Resistance of Metal to Deformation 2.6. Work of Plastic Deformation3. Fundamentals of Rolling Processes 3.1. Basic Concepts and Symbols in Rolling 3.2. Geometrical and Trigonometrical Relations in Rolling 3.3. Flow of Metal in Rolling 3.4. Interdependence of Draught, Elongation and Spread of Metal in Hot Rolling 3.5. Calculation of Draught, Elongation and Spread in Symmetrical Passes During Rolling of Bars 3.6. Mechanism of Bite and Friction in Rolling 3.7. Calculation of Rolling Temperature 3.8. Calculation of Rolling Speed 3.8.1. Neutral Angle and Forward Slip when Rolling with Spread 3.8.2. Neutral Angle in Hot and Cold Rolling without Spread 3.8.3. Calculation of Rolling Speed of Bars and Sections4. Roll Pressure, Torque, Work, and Power in Rolling 4.1. Roll Pressure and Load 4.1.1. Measurements of Pressure Distribution along the Arc of Contact in Hot and Cold Rolling 4.1.2. Determination of Roll Forces in Hot Rolling 4.2. Calculation of Roll Force in Hot Rolling 4.2.1. Tselikov's Method of Calculation of Roll Force [70] 4.2.2. Golovin-Tiagunov's Method of Calculation of Roll Force [70] 4.2.3. Samarin's Method of Calculation of Roll Force [70] 4.2.4. Ekelund's Method of Calculation of Roll Force [10] 4.2.5. Orowan-Pascoe Method of Calculation of Roll Force [10, 60] 4.2.6. Geleji's Method of Calculation of Roll Force [20] 4.2.7. Cook and McCrum's Method of Calculation of Roll Force [67] 4.2.8. Siebel's Method of Calculation of Roll Force [61] 4.3. Work, Torque, and Power in Rolling 4.3.1. Influence of Additional Friction and Deformation when Rolling in Box Passes [109] 4.3.2. Influence of Additional Friction and Deformation when Rolling in Breaking Down Passes [157] 4.3.3. Basic Formula for Calculation of Roll Power 4.3.4. Calculation of Rolling Work and Drive Power from Energy and Power Consumption Diagrams 4.4. Calculation of Roll Force in Cold Rolling 4.4.1. Tselikov's Method of Calculation of Roll Force in Cold Rolling 4.4.2. Ekelund's Method of Calculation of Roll Force in Cold Rolling 4.4.3. Siebel's Method of Calculation of Roll Force in Cold Rolling 4.4.4. Calculation of Roll Force in Cold Rolling from the Mean Resistance to Deformation [15, 31] 4.4.5. Calculation of Roll Force in Cold Rolling of Strip with Applied Front and Back Tension 4.4.6. Bland, Ford and Ellis's Graphical Method for Calculation of Roll Force 4.4.7. Trinks's Graphical Method for Determination of Roll Force in Keller's Form 4.4.8. Korolev-Nikolayevski's Method of Calculation of Roll Force in Cold Rolling 4.5. Calculation of Roll Torque and Power in Cold Rolling 4.5.1. Ford's Method of Calculation of Roll Torque 4.5.2. Tselikov's Method of Calculation of Roll Torque 4.5.3. Bland, Ford and Ellis's Graphical Method of Calculation of Roll Torque 4.5.4. Ford's Method of Calculation of Roll Torque with Applied Tension 4.5.5. Bland, Ford and Ellis's Method of Calculation of Roll Torque with Applied Tension 4.5.6. Other Methods of Calculation of Roll Torque 4.5.7. Effect of Strip Tension 4.6. Power of the Main Driving Motors5.