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IC Gupta's Engineering Metrology: A Comprehensive and Systematic Book for Mechanical Engineers (PDF)


- Overview of the book: What are the main topics covered and how is it organized? - Benefits of reading the book: How can it help you learn the various shop-floor measurement techniques and the basics of mechanical measurements? H2: Principles and Standards of Measurement - Definition and classification of measurement - Measurement errors and uncertainty - Measurement standards and traceability - Calibration and verification of measuring instruments H2: Limits, Fits and Tolerances - Definition and types of limits, fits and tolerances - Systems of limits and fits: ISO, ANSI, BIS - Selection and design of fits - Tolerance analysis and allocation H2: Linear Measurements - Definition and methods of linear measurements - Linear measuring instruments: Vernier calipers, micrometers, dial indicators, height gauges, etc. - Measurement of straightness, flatness, parallelism and squareness - Measurement of screw threads: Thread gauges, pitch measuring instruments, etc. H2: Angular Measurements - Definition and methods of angular measurements - Angular measuring instruments: Protractors, bevel protractors, sine bars, angle gauges, etc. - Measurement of tapers and slopes - Measurement of circularity and cylindricity H2: Comparators - Definition and types of comparators - Mechanical comparators: Dial gauge, Johansson Mikrokator, Sigma comparator, etc. - Electrical comparators: LVDT, capacitive comparator, etc. - Optical comparators: Zeiss Ultra-Optimeter, Fizeau interferometer, etc. H2: Optical Measurements - Definition and principles of optical measurements - Optical measuring instruments: Autocollimator, alignment telescope, toolmaker's microscope, etc. - Optical flats and interferometry - Laser metrology: Laser interferometer, laser micrometer, laser tracker, etc. Table 2: Article with HTML formatting Engineering Metrology by IC Gupta: A Comprehensive Guide for Mechanical Engineers




Engineering metrology is the science and practice of precise measurement of physical quantities in engineering applications. It involves the use of various instruments, methods and standards to ensure the accuracy and reliability of measurements. Engineering metrology is essential for the design, manufacture, inspection and quality control of engineering products and processes.




engineering metrology by ic gupta free download.zip



If you are a mechanical engineer or a student of mechanical engineering, you might be interested in reading a book that covers the fundamentals and applications of engineering metrology in a comprehensive and systematic way. One such book is Engineering Metrology by IC Gupta, published by Dhanpat Rai Publications.


This book is a textbook designed for students of mechanical, production and allied disciplines to facilitate learning of various shop-floor measurement techniques and also understand the basics of mechanical measurements. It covers the topics of engineering metrology in 12 chapters, each with a clear introduction, objectives, summary, review questions and solved examples. The book also includes appendices on units and conversion factors, symbols and abbreviations, glossary of terms and index.


In this article, we will give you an overview of the book and its main topics, and also highlight some of the benefits of reading it. By the end of this article, you will have a better idea of what this book can offer you and how it can help you improve your knowledge and skills in engineering metrology.


Principles and Standards of Measurement




The first chapter of the book introduces the basic concepts and principles of measurement. It defines measurement as the process of assigning a numerical value to a physical quantity by comparing it with a standard unit. It also classifies measurement into direct and indirect, absolute and relative, static and dynamic types.


The chapter then discusses the sources and types of measurement errors and uncertainty, and how they can be minimized and estimated. It explains the concepts of accuracy, precision, sensitivity, resolution, repeatability and reproducibility of measuring instruments.


The chapter also covers the topics of measurement standards and traceability. It describes the different types of standards such as primary, secondary, working and reference standards, and their roles in establishing a hierarchy of measurement accuracy. It also explains the concept of traceability as the property of a measurement result that relates it to a national or international standard through an unbroken chain of comparisons.


The chapter concludes with a section on calibration and verification of measuring instruments. It defines calibration as the process of determining the relationship between the output of a measuring instrument and the value of the input quantity. It also defines verification as the process of checking whether a measuring instrument conforms to a specified requirement or performance.


Limits, Fits and Tolerances




The second chapter of the book deals with the topics of limits, fits and tolerances. These are important concepts for ensuring interchangeability and functionality of engineering components.


The chapter defines limits as the maximum and minimum permissible values of a dimension or a parameter. It also defines fits as the degree of tightness or looseness between two mating parts. It further defines tolerances as the permissible variation in a dimension or a parameter from its nominal value.


Linear Measurements




The third chapter of the book covers the topic of linear measurements. It defines linear measurement as the measurement of length or distance along a straight line. It also describes the methods of linear measurement such as direct, indirect, contact and non-contact methods.


The chapter then discusses the various linear measuring instruments such as vernier calipers, micrometers, dial indicators, height gauges, etc. It explains the principle, construction, operation and applications of each instrument. It also gives the formulae for calculating the least count and the measurement error of each instrument.


The chapter also covers the topics of measurement of straightness, flatness, parallelism and squareness. It defines these geometrical characteristics and explains how they can be measured using instruments such as straight edges, surface plates, angle plates, spirit levels, etc.


The chapter concludes with a section on measurement of screw threads. It defines screw threads as helical grooves formed on a cylindrical or conical surface. It also describes the various elements and parameters of screw threads such as pitch, lead, angle, depth, form, etc. It then explains how screw threads can be measured using instruments such as thread gauges, pitch measuring instruments, thread micrometers, etc.


Angular Measurements




The fourth chapter of the book deals with the topic of angular measurements. It defines angular measurement as the measurement of angle or rotation between two lines or planes. It also describes the methods of angular measurement such as direct, indirect, contact and non-contact methods.


The chapter then discusses the various angular measuring instruments such as protractors, bevel protractors, sine bars, angle gauges, etc. It explains the principle, construction, operation and applications of each instrument. It also gives the formulae for calculating the least count and the measurement error of each instrument.


The chapter also covers the topics of measurement of tapers and slopes. It defines tapers as conical surfaces that gradually decrease in diameter from one end to another. It also defines slopes as inclined surfaces that form an angle with a horizontal plane. It then explains how tapers and slopes can be measured using instruments such as taper gauges, clinometers, inclinometers, etc.


The chapter concludes with a section on measurement of circularity and cylindricity. It defines circularity as the condition of a surface of revolution where all points on the surface are equidistant from a common axis. It also defines cylindricity as the condition of a surface of revolution where all points on the surface are equidistant from two parallel lines. It then explains how circularity and cylindricity can be measured using instruments such as roundness testers, cylindrical testers, etc.


Comparators




The fifth chapter of the book covers the topic of comparators. It defines comparators as instruments that compare an unknown dimension or parameter with a known standard or reference. It also classifies comparators into mechanical, electrical and optical types.


Johansson Mikrokator, Sigma comparator, etc. It also describes the working principle and features of electrical comparators such as LVDT (linear variable differential transformer), capacitive comparator, etc. It further describes the working principle and features of optical comparators such as Zeiss Ultra-Optimeter, Fizeau interferometer, etc.


The chapter also covers the topics of selection and application of comparators. It explains the factors that influence the choice of a comparator such as accuracy, sensitivity, range, speed, reliability, cost, etc. It also gives some examples of applications of comparators such as measurement of length, diameter, thickness, flatness, roundness, etc.


Optical Measurements




The sixth chapter of the book deals with the topic of optical measurements. It defines optical measurement as the measurement of physical quantities using light waves or rays. It also explains the principles and advantages of optical measurement such as high accuracy, non-contact, high speed, etc.


The chapter then discusses the various optical measuring instruments and their applications. It describes the working principle and features of autocollimator, alignment telescope, toolmaker's microscop