Fundamentals of Chip-Type Machining Processes_1

Fundamentals of Chip-Type Machining Processes_1 -...

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Unformatted text preview: Fundamentals of Chip-Type Machining Processes Chapter 20 Why machine parts? Create prototypes, models, molds, tool and dies, one-offs, Repair parts Create unique features Sharp corners O-ring grooves Flat, smooth surface for mating two pieces Curved, mating surfaces (piston and cylinder) Produce a part(s) dimensionally more accurate than castings When it is not economical to cast Types of Parts Machined Shafts Tube fittings Molds for plastic injection molding of parts Fasteners (bolts, screws, nuts) IC engine parts Tool and dies for stamping Bearings, gears, sprockets Jewelry Materials that can be machined Metal Wood Plastics Ceramics Composites (cutting, drilling, finishing) Stone (include jewelry) Concrete (cutting, drilling) Basic Machining Processes Shaping Turning Milling Drilling Sawing Broaching Grinding Variables in the Machining Process Independent Variables Tooling Workpiece material, condition, temperature Machining Parameters Cutting Fluid Machine tool Fixturing Variables in the Machining Process Dependent Variables Type of chip produced Force and energy dissipated in the cutting process Temperature rise in workpiece, chip, tool Wear and failure of the tool Surface finish produced Basic Machining Parameters Speed (V) Primary motion provided by a machine tool Relative motion between tool and workpiece...
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Fundamentals of Chip-Type Machining Processes_1 -...

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