JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Systems of limits and fits: Introduction, normal size, tolerance limits, deviations, allowance, fits and their types – unilateral and bilateral tolerance system, hole and shaft basis systems – interchangeability and selective assembly. Indian standard Institution system – British standard system, International Standard system for plain ad screwed work. Linear Measurement: Length standard, line and end standard, slip gauges – calibration of the slip gauges, Dial indicator, micrometers.

UNIT - II

Measurement of Angles and Tapers: Different methods – Bevel protractor – angle slip gauges – spirit levels – sine bar – Sine plate, rollers and spheres used to determine the tapers. Limit Gauges: Taylor’s principle – Design of go and No go gauges, plug ring, snap, gap, taper, profile and position gauges. Optical Measuring Instruments: Tool maker’s microscope and its uses – collimators, optical projector – optical flats and their uses, interferometer. Flat Surface Measurement: Measurement of flat surfaces – instruments used – straight edges – surface plates – optical flat and auto collimator.

UNIT - III

Surface Roughness Measurement: Differences between surface roughness and surface waviness-Numerical assessment of surface finish – CLA,R, R.M.S Values – Rz values, Rz value, Methods of measurement of surface finish-profilograph. Talysurf, ISI symbols for indication of surface finish. Measurement Through Comparators: Comparators – Mechanical, Electrical, and Electronic Comparators, pneumatic comparators, and their uses in mass production. Screw Thread Measurement: Element of measurement – errors in screw threads – measurement of effective diameter, angle of thread and thread pitch, profile thread gauges. Gear Measurement: Gear measuring instruments, Gear tooth profile measurement. Measurement of diameter, pitch pressure angle and tooth thickness. Coordinate Measuring Machines: Types of CMM, Role of CMM, and Applications of CMM.

UNIT - IV

Machine Tool Alignment Tests: Requirements of Machine Tool Alignment Tests, Alignment tests on lathe, milling, drilling machine tools.. Preparation of acceptance charts.

R16 B.TECH AUTOMOBILE ENGG.

UNIT - V

Surface Engineering: Surface texture and properties, Surface cleaning techniques, Surface integrity, Wear and its measurements, Lubricants and its selection for reducing wear, Principles of corrosion and remedial measures, Laser applications for surface modifications. Surface Treatments: Mechanical surface treatment and coating, casehardening and surface coating, thermal spraying, Vapour deposition, Ion implantation, Diffusion coating, Electro plating, Electroless plating and Electro forming, Ceramic, Organic and Diamond coating

TEXT BOOKS:

• 1. Manufacturing Engineering and Technology, Serope Kalpakjian and Steven R. Schmid, Ed. 4, Pearson Publications, 2001
• 2. Metrology and Measurement, Anand Bewoor, Vinay A. Kulakarni, TMH, 2009
• 3. Principles of Engineering Metrology, R. Rahendra, JAICO Publications, 2008

REFERENCES:

• 1. Fundamentals of Dimensional Metrology, 4e , Connie Dotson, Thomson, 2003
• 2. Surface Engineering with Lasers/ Dehosson J.T.
• 3. Surface Engineering for corrosion and wear resistance / JR Davis/ Woodhead Publishers.
• 4. Precision Engineering and Manufacturing/ R.L Murty/ New Age Publications, 2009 R16 B.TECH AUTOMOBILE ENGG.