Standard |
AEP 108 - Dimensional Measurement
Introduces precision measurement using both English and metric units. Students also develop skills in using precision measuring tools. Topics include: measurement; micrometer and vernier measurement; surface plate and accessory instruments; fixed, adjustable, and pneumatic gages; dial indicators and comparators; optical and electronic measurements; and coordinate measuring machines.
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Competency Areas |
Hours
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Measurement |
Class |
3 |
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Micrometer and Vernier Measurement |
D. Lab |
2 |
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Surface Plate and Accessory Instruments |
P. Lab/O.B.I. |
0 |
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Fixed, Adjustable, and Pneumatic Gauges |
Credit |
4 |
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Dial Indicators and Comparators |
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Optical and Electronic Measurements |
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Coordinate Measuring Machines |
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Prerequisite: |
Program admission |
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Corequisite: |
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Course Guide |
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Competency |
After completing this
section, the student will: |
Hours |
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Class |
D.Lab |
P.Lab/ O.B.I. |
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MEASUREMENT |
3 |
0 |
0 |
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S. I. |
Recognize International System of Units measurements. |
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Conversion |
Convert English system measurements into metric and vice versa. |
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Metric and English |
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MICROMETER AND VERNIER MEASUREMENT |
3 |
2 |
0 |
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Vernier measuring tools |
Make measurements using vernier measuring tools to an accuracy of +.0005 inch (+.000125 mm). |
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Micrometer |
Measure specimens using micrometer or related instrument (depth gage, screw thread and others) to an accuracy of +.0005 inch (+.000125 mm). |
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Bevel protractor |
Measure angles of a given part to an accuracy of +.25 degrees. |
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Care and handling |
Demonstrate the proper handling and cleaning of micrometers, vernier calipers, and other precision measuring instruments. |
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SURFACE PLATE AND ACCESSORY INSTRUMENTS |
6 |
4 |
0 |
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Plate theory |
Explain the theory of the surface plate as a true reference surface. |
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Instruments |
Demonstrate how instruments are used with the surface plate to inspect parts including: vernier height gage with height-measuring standard, angle plate and block with parallels and squares, sine bars, sine plate, and test indicators. |
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Care and handling |
Demonstrate the procedures for the proper care and handling of surface plates. |
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FIXED, ADJUSTABLE, AND PNEUMATIC GAUGES |
4 |
3 |
0 |
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Set up |
Set up fixed gages with permissible variation from specified dimensions. |
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Go and no-go gauges |
Explain the principle of go and no-go gages. |
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Adjustable gauges |
Set up an adjustable gage to show the amount of variation from the specified dimensions. |
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Features |
Check surface feature, flatness, straightness and concentricity. |
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DIAL INDICATORS AND COMPARATORS |
4 |
4 |
0 |
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Comparison measurements |
Make comparison measurements with dial indicators. |
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Balance vs. continuous dials |
Differentiate between the precision capabilities of balance dial and continuous dials, both in metric and English. |
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Correction factors |
Interpret correction factors associated with test indicators. |
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Verify indicator calculations. |
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Care and handling |
Demonstrate the proper procedures for the care and handling of indicators. |
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OPTICAL AND ELECTRONIC MEASUREMENTS |
5 |
2 |
0 |
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Optical measurements |
Explain the operation of a toolmaker's microscope. |
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Take measurements with a toolmaker's microscope. |
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Set up a comparator for the precision required in production. |
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Explain the operation of an optical comparator. |
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Electronic measurement |
Explain the use of instruments used for electronic measurement. |
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COORDINATE MEASURING MACHINES |
5 |
5 |
0 |
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Theory |
Discuss the theory of basic coordinate machines with three axes (X, Y, and Z) to an accuracy of +.0005 inch. |
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Demonstrate the set up of various complex parts on coordinate measuring machines. |
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Demonstrate proper procedures for the care and handling of coordinate measuring machines (stress sensitivity of machine). |
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Suggested Resources |
Busch & Wilkie Brothers Foundation Staff. (1989).
Fundamentals of dimensional metrology
(2nd ed.). Albany, NY: Delmar.
Center for Occupational Research &
Development Staff. (1984). Course 30:
Mechanical inspection. Waco, TX: Author.
Center for Occupational Research &
Development Staff. (1987). Metrology.
Waco, TX: Author.
Freeman, H. (1989). Machine vision for inspection and measurement. Oshkosh, WI:
Academic Press.
Hewitt, P. L. (1984). Modern techniques in metrology. Teaneck, UT: World Scientific.
Instrument Society of America. (1985). Proceedings of the international instrumentation
symposium, 31st. Research Triangle Park, NC: Author.
Instrument Society of America. (1986). Proceedings of the international
instrumentation symposium, 32nd. Research Triangle Park, NC: Author.
Instrument Society of America. (1987). Proceedings of the international
instrumentation symposium, 33rd. Research Triangle Park, NC: Author.
Instrument Society of America. (1988). Proceedings of the international
instrumentation symposium, 34th. Research Triangle Park, NC: Author.
Karmer, B. (1989). The art of measurement: Metrology in fundamental & applied physics.
New York: VCH.
Tse & Morse. (1989). Measurement & instrumentations in the laboratory. New York:
Dekker.
Tustin, W. (1985). Aerospace vibration testing, measurement, analysis & calibration.
Santa Barbara, CA: Tustin Technical Institute.
Busch & Wilkie
Brothers Foundation Staff. (1989). Fundamentals of dimensional metrology (2nd
ed.). Albany, NY: Delmar.
Center for Occupational
Research & Development Staff. (1984). Course 30: Mechanical inspection. Waco,
TX: Author.
Center for Occupational
Research & Development Staff. (1987). Metrology. Waco, TX: Author.
Freeman, H. (1989). Machine
vision for inspection and measurement. Oshkosh, WI: Academic Press.
Hewitt, P. L. (1984). Modern
techniques in metrology. Teaneck, UT: World Scientific.
Instrument Society of America. (1985). Proceedings
of the international instrumentation symposium, 31st. Research Triangle Park,
NC: Author.
Instrument Society of America. (1986). Proceedings
of the international instrumentation symposium, 32nd. Research Triangle Park,
NC: Author.
Instrument Society of America. (1987). Proceedings
of the international instrumentation symposium, 33rd. Research Triangle Park,
NC: Author.
Instrument Society of America. (1988). Proceedings
of the international instrumentation symposium, 34th. Research Triangle Park,
NC: Author.
Karmer, B. (1989). The
art of measurement: Metrology in fundamental & applied physics. New York:
VCH.
Tse & Morse. (1989).
Measurement & instrumentations in the laboratory. New York: Dekker.
Tustin, W. (1985). Aerospace vibration testing,
measurement, analysis & calibration. Santa Barbara, CA: Tustin Technical
Institute.