Standard |
Provides instruction in advanced techniques of milling machine operations. Emphasis is placed on skill development through laboratory practice. Topics include: indexing; rotary table; boring, facing, and turning; straddle milling, and safety.
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Competency Areas |
Hours
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Indexing |
Class |
3 |
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Rotary Table |
D. Lab |
4 |
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Boring, Facing, and Turning |
P. Lab/O.B.I. |
3 |
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Straddle Milling |
Credit |
6 |
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Safety |
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Prerequisite: |
MCA 201 |
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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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INDEXING |
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General information |
Identify the parts of a dividing head. |
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Explain a 40:1 and 5:1 indexing ratio. |
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Setup |
Demonstrate setting up a dividing head and milling machine to cut a specified number of cuts on a round workpiece. |
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ROTARY TABLE
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Explain how to determine the ratio for a rotary table. |
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Set up a rotary table to cut circular features on a workpiece. |
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BORING, FACING, AND TURNING |
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Setup |
Set up a milling machine to drill a bore hole to .002 of an inch of specified size using a fly cutter. |
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Calculate the feeds and speeds needed to bore with a fly cutter. |
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Application |
Face a workpiece using a fly cutter, a shell mill, and an end mill. |
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Complete all calculations of feeds and speeds required for each type cutter. |
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Set up a rotary table for turning using feed dials and edge fingers to the set machine table to cut a specified diameter. |
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STRADDLE MILLING |
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Setup |
Define side milling cutters and explain how two can be set up on the arbor to specified dimensions between the cutting surfaces. |
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Calculate the cutting speed and feeds for the size, type of cutter and material, and number of teeth on the cutters. |
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Set up the cutters to mill two ends of a workpiece square. |
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Application |
Cut parallel shoulders on a workpiece to a specified depth. |
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Use a dividing head and straddle milling to cut round stock to a hexagonal shape. |
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Set up a gang milling operation to square two sides, and square the top surface of the workpiece. |
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SAFETY |
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Suggested Resources |
ASM International. (1987). Tool materials for high-speed machining.
Materials Park, OH: Author.
ASM International. (1988). Machining source book. Materials Park,
OH: Author.
ASM International. (1989). Machining metals handbook (Vol. 16).
Materials Park, OH: Author.
Baril, R. (1987). Modern machining technology. Albany, NY: Delmar.
Business Communications Staff. (1986). Advanced high technology machining systems.
Norwalk, CT: Author.
Gingery, D. J. (1982). The milling machine. Springfield, MO: Author.
Kibbe, R. A. (1985). Milling machine operations. New York: John Wiley & Sons.
McGeough, J. A. (1988). Advanced methods of machining. New York: Chapman & Hall.
Rizzo, L. (1984). Milling machine explained. Garden City, NJ: Bergwall.
Smith, G. T. (1989). Advanced machining. New York: Springer-Verlag.