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Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.

Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.

Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.

Source: Digital Library of India Scanning Centre: C-DAC, Noida Source Library: Central Library, Bits- Pilani Date Accessioned: 6/24/2015 0:44 The Digital Library of India was a project under the auspices of the Government of India.

146 p. : 22 cm

146 p. : 22 cm

This book provides an extensive overview of engineering principles, focusing on materials, manufacturing processes, and machine tool operations. The first chapters lay the foundation by addressing essential topics such as engineering materials, including metals, alloys, and heat treatments, and progressing to drawing techniques, tolerances, and fits. The content explains how to interpret engineering drawings, the importance of precision in machining, and the different types of machine tools, along with their drives and electrical components. Special emphasis is placed on grinding wheels and the intricacies of the grinding process, detailing the types of cutting tools, abrasive materials, and methods for inspecting and measuring precision during the manufacturing process. Later chapters delve into practical aspects of engineering mechanics, including motion, forces, friction, and the principles of mechanisms. The text explores the technicalities of grinding, offering a detailed look at the forces involved, power calculations, and cooling systems. Additionally, chapters on maintenance and operational accuracy of grinding machines highlight the importance of proper setup and lubrication. The final sections focus on the automation of grinding operations, safety techniques, and the standard procedures used for ensuring quality control, making the book a comprehensive guide for engineers involved in machine tool operation, material selection, and precision manufacturing. Translated from the Russian by G. Isserlis Introduction 9 Chapter 1: Engineering Materials 11 1-1. General Information on Metals 11 1-2. Basic Properties of Metals 12 1-3. Cast Irons 19 1-4. Steels 20 1-5. Heat Treatment and Case Hardening of Metals 24 1-6. Cutting Alloys 27 1-7. Non-ferrous Metals and Alloys 29 1-8. Corrosion of Metals 33 1-9. Non-metallic Materials 35 1-10. The Fabrication of Metals 37 Chapter 2: Heading Drawings 44 2-1. Drawings and Sketches 44 2-2. Methods of Representation in Drawings 45 2-3. Lines on Drawings 48 2-4. Dimensioning, Specifying Geometrical Features and Surface Finish on Drawings 50 2-5. Revolved and Removed Sections 52 2-6. Other Sectional Views 53 2-7. Representation of Screw Threads and Gears 56 2-8. Assembly Drawings 60 2-9. Graphical Symbols of Machine Parts and Units Used in Diagrams 61 2-10. Rules for Reading Drawings 64 2-11. Taking Measurements Chapter 3: Tolerances and Fits 65 3-1. Interchangeability of Parts 65 3-2. Machining Accuracy 66 3-3. Nominal, Actual and Limiting Sizes 66 3-4. Tolerances 68 3-5. Clearances and Interferences 69 3-6. Fits 71 3-7. Notation of Tolerances and Fits 74 3-8. Grades of Accuracy 75 3-9. Surface Finish 87 Chapter 4: Measuring Inspection Equipment and Techniques 82 4-1. Importance of Quality Inspection in Machine Building 82 4-2. Accuracy of Measurement 83 4-3. Instruments for Measuring Linear Dimensions 83 4-4. Instruments for Checking and Measuring Angles 89 4-5. Inspection of Threads 96 4-6. Lever-type Measuring Instruments 97 4-7. Limit Gauges 104 4-8. Gauge Blocks 105 4-9. Optical, Pneumatic, and Electrical Measuring Devices 101 4-10. Automatic Gauging in Grinding 108 Chapter 5: Aspects of Engineering Mechanics 111 5-1. Types of Motion 111 5-2. A Force 111 5-3. Friction and Its Role in Engineering 116 5-4. Principles of Mechanisms and Machines 117 5-5. Deformation 118 Chapter 6: Grinding Wheels 120 6-1. Types of Cutting Tools and Their Action 120 6-2. Abrasive Materials 121 6-3. Grain Size of Abrasive Materials 128 6-4. Bonding Materials 133 6-5. Hardness of Grinding Wheels 135 6-6. Structure of a Grinding Wheel 136 6-7. Wheel Shapes and Markings 131 6-8. Testing Grinding Wheels 141 6-9. Coated Abrasives 141 Chapter 7: Tile Cutting Process in Grinding 142 7-1. Characteristics of the Grinding Process 142 7-2. Grinding Conditions 143 7-3. The Process of Cutting Metal with a Grinding Wheel 141 7-4. Forces Acting in the Grinding Process 150 7-5. Calculation of the Power Required in Grinding 152 7-6. Wheel Life 153 7-7. Heating of the Workpiece During Grinding 155 7-8. Cooling and Cooling Fluids 157 Chapter 8: Typical Units of Metal-cutting Machine Tools 160 8-1. Classification of Metal-cutting Machine Tools 160 8-2. Gear Trains of Machine Tools 161 8-3. Spindles and Their Supports 162 8-4. Types of Transmission 166 8-5. Hydraulic Drives 177 8-6. Electrical Drives 188 Chapter 9: Electrical Equipment of Metal-cutting Machine Tools 190 9-1. Direct Current 190 9-2. Alternating Current 192 9-3. Induction Motors 194 9-4. Starting Devices 196 9-5. Protective Devices 199 9-6. Electrical Safety Measures 199 Chapter 10. Grinding Machines 10-1. Construction of Cylindrical Grinders - 202 10-2. Cylindrical Grinder Model 312M - 204 10-3. Hydraulic System of the Model 312M Grinder - 220 10-4. Setting up the Model 312M Grinder for Internal Grinding - 224 10-5. Lubrication and Cooling Systems of the Model 312M Grinder - 225 10-6. Semi-Automatic Cylindrical Grinder, Model 315 - 226 10-7. Internal Grinders - 229 10-8. Internal Grinder, Model 3250 - 230 10-9. Centreless Grinding - 233 10-10. Centreless Grinder, Model 3180 - 233 10-11. Service Manual of a Machine Tool - 236 10-12. Operating Accuracy of a Grinding Machine - 238 10-13. Grinder Maintenance Rules - 240 Chapter 11. Grinding Practice 11-1. The Manufacturing Process - 241 11-2. Selecting the Grinding Wheel - 245 11-3. Mounting and Balancing the Grinding Wheel - 248 11-4. Dressing and Tilting the Wheel - 249 11-5. Accessories and Attachments - 252 11-6. Preparing and Setting up the Machine for Grinding - 262 11-7. Grinding External Cylindrical Surfaces - 265 11-8. Face Grinding - 272 11-9. Grinding External Papered Surfaces - 274 11-10. Grinding Cylindrical and Tapered Holes - 281 11-11. Form Grinding - 284 11-12. High-Speed Grinding - 282 11-13. Automation of Grinding Operations - 289 11-14. Ejections and Measures Taken to Prevent Them - 291 11-15. Safety Techniques - 293 Index - 296

Book digitized by Google from the library of the University of Wisconsin - Madison and uploaded to the Internet Archive by user tpb.

Book digitized by Google from the library of the University of Wisconsin - Madison and uploaded to the Internet Archive by user tpb.

1Letters of John Keats to His Family and Friends

By Sidney Colvin and John Keats

These are the letters of John Keats, as written to family, close friends and others during his brief, eventful years as an artist. (However, the editor chose to exclude love letters to Fanny Brawne, respecting their private nature.) The celebrated Keats letters were written between 1816–1820, and include those colorful entries penned during his 44-day tour with Charles Brown as they rambled through England, Ireland and Scotland. Also included are the famous, lengthy "journal letters," written to his brother George and sister-in-law in America. Not only a poetic genius, Keats shines in epistolary form. His letters brim with the emotion, wit and intelligence he routinely shared with intimates. - Summary by NemoR