LINEAR AND ANGULAR MEASUREMENTS Length Standards - Length Measuring instruments - Vernier instruments - micrometer, height gauge, dial indicators, Bore gauges, Slip gauges, Comparators - Mechanical, Electrical, Optical and Pneumatic, Optical Projector. Angle measuring instruments - Bevel protractor, Spirit level, Sine bar, Autocollimator, Angle Decker.
FORM MEASUREMENT Screw thread terminology- Measurement of effective diameter by two wire and three wire methods - errors in threads- Measurement of pitch, profile errors and total composite errors, Gear tooth terminology-Methods of measurements of run out, pitch, profile, lead, backlash, tooth thickness-composite method of inspection - Parkinson gear tester - Measurement of surface finish - Stylus probe instruments - Tomlinson and Talysurf instrument-Straightness, Flatness and Roundness measurement.
ADVANCES IN METROLOGY Precision instruments based on Laser- laser interferometer – Universal Measuring Machine- Tool maker’s microscope - Coordinate Measuring Machine (CMM): need, construction, types, applications- Computer Aided Inspection, Machine Vision - Introduction to Nanometrology
PROCESS CONTROL FOR VARIABLES AND ATTRIBUTES Definition and concept of quality - significance of SQC - benefits and limitations of SQC - Quality assurance - Quality cost - Process capability – process capability studies – Construction and uses of control chart – Control chart for variables – X bar chart, R- chart, S-chart- Control chart for attributes – c- chart, u- chart, p- charts.
ACCEPTANCE SAMPLING Lot by lot sampling - probability of acceptance in single, double, multiple sampling techniques – OC curves – producers’ risk and consumers risk. AQL, LTPD, AOQL concepts-standard sampling plans for AQL and LTPD.
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