Machining 12 (The Best of All Trades) Purpose: Provide hands on
experience in machining to engineering students
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Bridging the Gap l Engineers design and supervise construction
of mechanical devices. l Machinists build the devices l The skill
and knowledge each has compliments the other.
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Goal l Gain familiarity with fundamental machining concepts and
operations
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What is Machining Anyway? l Historically machining has been any
number of material removal processes. Generally performed to a high
degree of accuracy l More recently additive manufacturing has been
included (3D printing)
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What is a Machinist l A person with specialized knowledge in
the art of machining and skill in precision work. l Types: l Manual
l CNC l Tool and Die l Specialist
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Methods of Machining l Cutting l EDM l 3D printing l Precision
grinding
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Cutting l Milling l Turning
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EDM l Using high amperage electric discarge to evaporate
metal.
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3D Printing l Building a component by putting down thin layers
of material until a 3D object is produced
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Grinding l Abrasive removal of stock
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Thoughts on Precision l 1/16 in. is.0625 of an inch l Human
hair is.003 inch l Machinists work with tolerances near a human
hair l Tool Makers work with.0001 inch l Light Waves are
near.000016 Inchs l Gage blocks used by machinist/ tool makers are
accurate to.000002 inches
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Precision Measurement
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l 1. Plan ahead l 2. Motion ain't necessarily progress l 3.
Safety first, last, and ALWAYS: Particularly over appearance l 4.
Horseplay has no place in any workshop l 5. Last, but not least
Never underestimate the power of a wily old machinist!