MSBTE 22342 Engineering Metrology Notes |
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Here's a general overview of the
topics usually covered:
1.
Introduction to Metrology:
·
Importance of Metrology in Manufacturing and
Quality Control.
·
Fundamental concepts: precision, accuracy,
repeatability, reproducibility.
2.
Measurement Standards:
·
Primary, secondary, and working standards.
·
International and national standards
organizations (like ISO).
3.
Linear Measurements:
·
Instruments: vernier calipers, micrometers,
height gauges, slip gauges.
·
Comparators: mechanical, optical, pneumatic, and
electronic comparators.
4.
Angular Measurements:
·
Instruments: sine bar, angle gauges, vernier
bevel protractor.
·
Measurement of taper, angle, and flatness.
5.
Form Measurements:
·
Measurement of roundness, straightness,
cylindricity, and flatness.
·
Surface finish measurements: Ra, Rz, Rmax, and
their significance.
6.
Advanced Measuring Instruments:
·
Coordinate Measuring Machines (CMM): types,
construction, applications.
·
Toolmaker's microscope, profile projector,
interferometers.
7.
Gauge Design:
·
Taylor's principle of gauge design.
·
Types of gauges: plug gauge, ring gauge, snap
gauge, thread gauge.
8.
Temperature and Pressure Measurements:
·
Thermometers, thermocouples, and pyrometers.
·
Manometers, pressure gauges, vacuum gauges.
9.
Optical Metrology:
·
Principles of interference and diffraction.
·
Optical flats, interferometers, and their
applications in metrology.
10.
Metrology in Machine Tools:
- Measurement of machine tool accuracy: alignment
tests.
- Acceptance tests for different machine tools.
11.
Modern Trends in Metrology:
·
Introduction to nanometrology.
·
Non-contact measurement techniques: laser-based,
ultrasonic, eddy current.
12.
Metrological Instruments Calibration:
- Need for calibration.
- Methods, frequency, and standards for calibration.