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Chapter23ba - Materials Processes in Manufacturing ME 151...

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©2003 Bill Young 1 Materials & Processes in Manufacturing ME 151 Chapter 23 Turning, Boring, and Related Processes ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bill Young 2 Introduction Introduction ______ - Process of machining external cylindrical and conical surfaces Straight Turning - Tool fed parallel to axis of rotation Taper Turning - Tool fed at angle to axis of rotation Form Turning - Tool has specific form and fed inward Related Operations: Facing - Tool fed at 90 o to axis of rotation Parting or Cut-Off - Tool fed to axis and part is cut off Necking - Similar to parting only part is not cut off ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bill Young 3 Introduction Introduction _____ - Basically internal turning Threading - Creating or “chasing” threads Knurling - Process producing a straight or diamond pattern Drilling - Creation of a hole ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________
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©2003 Bill Young 4 Dimensional Accuracy & Precision Dimensional Accuracy & Precision Factors affecting dimensional accuracy and precision: Tool Wear Creates changes in diameter Increases cutting forces Increases deflection Creates built-up edge on tool Surface roughness Workpiece shape and material Rigidity of material, tools, and equipment Surface finish Vibration ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________
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  • Spring '08
  • AlanT.Male
  • 175, Screw machine, Bill Young, ___________________________________ ___________________________________, Automatic Screw Machines

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