Unit 1
METROLOGY LAB LINEAR AND ANGULAR MEASUREMENTS:
Slip gauges, Micrometers, Verniers, Dial gauges and Surface plates – Comparators: Mechanical, Electrical, Pneumatic and Optical comparator. Angular measuring instruments – Sine bar, Angle gauges, Spirit level, Auto collimators.
MEASUREMENT OF SURFACE FINISH AND MEASURING MACHINES:
Surface finish: Definitions – Types of Surface texture: Surface roughness, Measurement of run out and concentricity, Optical projection comparator – Tool makers microscope.
MEASUREMENT OF SCREW THREADS AND GEARS:
Internal / External Screw thread: Terminology, Measurement of various elements of threads – Thread micrometer method, Gear Terminology, Measurement of various elements.
MEASUREMENTS LAB
Calibration of Pressure Gauge, Thermocouple, LVDT, Load cell. Measurement of load, torque, speed, angular displacement. Study of strain gauge rosettes, determination of modulus of elasticity using strain gauges. Study of stress concentration using photo-elasticity for simple components like plate with a hole under tension or bending, circular disk with circular hole under compression.