MEEG 219
Metrology
3 Cr.
Course objective:
The objective of this course is to develop the general rules and basic philosophies of:
1. Design of part, tolerances and fits.
2. Principles of measuring instruments and gauges and their uses.
3. Evaluation and inspection of surface roughness.
4. Inspection of spur gear and thread elements.
Module Details:
Module 1:
General measurement concept - Principles of achieving accuracy. Methods for estimating accuracy and precision. precision versus accuracy. Systematic and constant errors.
Module 2:
General principles of measurements - Line and end measurements. Standards. Linear measurements. Tolerance. Systems of limits and fits. Selecting and assigning of fits.
Module 3:
Gauges - Classification. Design of gauges; gauge makers' tolerance, wear allowance. Gauge material and gauge manufacture. Tools of checking straightness; flatness and squareness.
Module 4:
Measurements of angles and tapers - Sine bar and angle gauges. Taper gauges, bevel protractors.
Module 5:
Measurement of Surface Finish - Definition; elements of surface finish. Symbols for specifying surface finish. Instruments for surface finish measurement.
Module 6:
Measurement of Screw Threads – Screw thread terminology. Standard specifications of threads. Thread gauge measurement, measuring equipment for threads
Module 7:
Gear measurement - Measuring methods for run-outs. Pitch profile, lead, backlash and tooth thickness; composite elements; inspection equipment.
Evaluation Scheme:
Final Evaluation – 75% and Internal Evaluation – 25%
Final Evaluation Breakdown: Objective Questions (20%), Subjective Questions (55%)
Internal Evaluation Breakdown: Internal Assessments (15%), Assignments (5%) and Presentations (5%)
References:
Following books will be used as reference materials for this course.
1. N.V. Raghavendra, “Engineering Metrology And Measurements”, Oxford University Press.
2. R.K Jain, "Metrology", Khanna Publication, New Delhi.
3. Sharpe, "Metrology",ELBS.
4. Hume, "Metrology", McDonald & Co.