ME3592
METROLOGY AND MEASUREMENTS
COURSE OBJECTIVES
1.
To learn basic concepts of the metrology and importance of measurements.
2.
To teach measurement of linear and angular dimensions assembly and transmission
elements.
3.
To study the tolerance analysis in manufacturing.
4.
To develop the fundamentals of GD & T and surface metrology.
5.
To provide the knowledge of the advanced measurements for quality control in
manufacturing industries.
UNIT – I
BASICS OF METROLOGY
Measurement
– Need, Process, Role in quality control; Factors affecting measurement -
SWIPE; Errors in Measurements – Types – Control – Measurement uncertainty –
Types, Estimation, Problems on Estimation of Uncertainty, Statistical analysis
of measurement data, Measurement system analysis, Calibration of measuring
instruments, Principle of air gauging- ISO standards.
UNIT – II
MEASUREMENT OF LINEAR, ANGULAR DIMENSIONS, ASSEMBLY AND TRANSMISSION
ELEMENTS
Linear
Measuring Instruments – Vernier caliper, Micrometer, Vernier height gauge,
Depth Micrometer, Bore gauge, Telescoping gauge; Gauge blocks – Use and
precautions, Comparators – Working and advantages; Opto-mechanical measurements
using measuring microscope and Profile projector – Angular measuring
instruments – Bevel protractor, Clinometer, Angle gauges, Precision level, Sine
bar, Autocollimator, Angle dekkor, Alignment telescope. Measurement of Screw
threads - Single element measurements – Pitch Diameter, Lead, Pitch.
Measurement of Gears – purpose – Analytical measurement – Runout, Pitch
variation, Tooth profile, Tooth thickness, Lead – Functional checking – Rolling
gear test.
UNIT – III
TOLERANCE ANALYSIS
Tolerancing–
Interchangeability, Selective assembly, Tolerance representation, Terminology,
Limits and Fits, Problems (using tables IS919); Design of Limit gauges,
Problems. Tolerance analysis in manufacturing, Process capability, tolerance
stackup, tolerance charting.
UNIT – IV
METROLOGY OF SURFACES
Fundamentals
of GD & T- Conventional vs Geometric tolerance, Datums, Inspection of
geometric deviations like straightness, flatness, roundness deviations; Simple
problems – Measurement of Surface finish – Functionality of surfaces,
Parameters, Comparative, Stylus based and Optical Measurement techniques,
Filters, Introduction to 3D surface metrology- Parameters.
UNIT – V
ADVANCES IN METROLOGY
Lasers
in metrology - Advantages of lasers – Laser scan micrometers; Laser
interferometers – Applications – Straightness, Alignment; Ball bar tests,
Computer Aided Metrology - Basic concept of CMM – Types of CMM – Constructional
features – Probes – Accessories – Software – Applications – Multisensor CMMs. Machine
Vision - Basic concepts of Machine Vision System – Elements – Applications -
On-line and inprocess monitoring in production - Computed tomography – White
light Scanners.
TOTAL:
45 PERIODS
OUTCOMES:
At
the end of the course the students would be able to
1.
Discuss the concepts of measurements to apply in various metrological
instruments.
2.
Apply the principle and applications of linear and angular measuring
instruments, assembly and transmission elements.
3.
Apply the tolerance symbols and tolerance analysis for industrial applications.
4.
Apply the principles and methods of form and surface metrology.
5.
Apply the advances in measurements for quality control in manufacturing
Industries.
TEXT BOOKS:
1.
Dotson Connie, “Dimensional Metrology”, Cengage Learning, First edition, 2012.
2.
Mark Curtis, Francis T. Farago, “Handbook of Dimensional Measurement”,
Industrial Press, Fifth edition, 2013.
REFERENCES:
1.
AmmarGrous, J “Applied Metrology for Manufacturing Engineering”, Wiley-ISTE,
2011.
2.
Galyer, J.F.W. Charles Reginald Shotbolt, “Metrology for Engineers”, Cengage
Learning EMEA; 5th revised edition, 1990.
3.
National Physical LaboratoryGuideNo. 40, No. 41, No. 42, No. 43, No. 80, No.
118, No. 130, No. 131. http://www.npl.co.uk.
4.
Raghavendra N.V. and Krishnamurthy. L., Engineering Metrology and Measurements,
Oxford University Press, 2013.
5.
Venkateshan, S. P., “Mechanical Measurements”, Second edition, John Wiley
&Sons, 2015.