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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!