met 1321 machining and welding. introduction to machining
TRANSCRIPT
The Lathe
A machine in which a workpiece in a workholding device is rotated while a stationary cutting tool is forced against it. Some operations performed on a lathe include turning, boring, facing, thread cutting, drilling, and reaming.
Drill Press
A machine that rotates a drill against stationary material with sufficient pressure to cause the drill to penetrate the material. It is primarily used for cutting round holes.
Grinding Machine
A machine that removes material by rotating an abrasive wheel or belt against the work.
Surface GrinderSurface Grinder
Bench Grinder
Belt Grinder
Broaching Machine
A machining process for flat, round, and contoured surfaces, both internal and external. A broach is pushed or pulled across the work, with each tooth removing only a small portion of the material. Cutting a key is typically a broaching process.
Electrical Discharge Machining (EDM)
A process by which an electric spark is used to erode away small amounts of material from a workpiece. EDM is used to machine soft or hard materials that are difficult to work by conventional machining.
Ultrasonic Machining
A machining process in which sound waves above the audible range propel an abrasive for use as a metal-cutting tool.
Electron Beam Machining(EBM)
A metal removing process in which heat is produced by a sharply focused electron beam.
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