Secondary and Finishing Operations
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Questions and Answers

What is the main limitation of the processes described before?

  • They cannot produce shiny bearing surfaces
  • They require manual labor for finishing
  • They cannot be used for secondary operations
  • They cannot make parts to their final dimensions and surface finish (correct)

    • What kind of operations are being referred to?

  • Quality control operations
  • Secondary and finishing operations (correct)
  • Packaging and shipping operations
  • Primary manufacturing operations

    • What is the importance of surface finish in part production?

  • It affects the part's durability
  • It affects the part's weight
  • It affects the part's functionality (correct)
  • It affects the part's aesthetic appeal

    • What does the text imply about the processes described before?

    <p>They have limitations in terms of surface finish and dimensions</p> Signup and view all the answers

    What is the context of the part production being discussed?

    <p>Production of high-precision mechanical parts</p> Signup and view all the answers

    What is the term for the angle between the major flank and the cutting plane?

    <p>Clearance angle</p> Signup and view all the answers

    What is the main goal of machining by cutting?

    <p>To remove material from the workpiece</p> Signup and view all the answers

    Which of the following is NOT a type of material used for machining tools?

    <p>Glass</p> Signup and view all the answers

    In the context of machining, what is the 'workpiece'?

    <p>The material being cut or shaped</p> Signup and view all the answers

    What is the direction in which the cutting tool moves during machining?

    <p>Cutting direction</p> Signup and view all the answers

    What is the primary effect of reducing friction between the cutting tool and work-piece?

    <p>Reduced wear of the tool</p> Signup and view all the answers

    What is the result of reducing the friction between the cutting tool and work-piece on the tool's temperature?

    <p>The tool's temperature decreases</p> Signup and view all the answers

    What is the primary benefit of reducing the friction between the cutting tool and work-piece?

    <p>Improved tool lifespan</p> Signup and view all the answers

    What happens to the wear of the tool when friction between the cutting tool and work-piece is reduced?

    <p>The wear of the tool decreases</p> Signup and view all the answers

    What are the two effects of reducing friction between the cutting tool and work-piece?

    <p>Reduced tool heating and reduced tool wear</p> Signup and view all the answers

    What is the tool angle a measure of?

    <p>The angle between the tool face and the flank</p> Signup and view all the answers

    What is the flank in relation to the tool?

    <p>The side of the tool</p> Signup and view all the answers

    What is the wedge in the context of the tool?

    <p>The tool itself</p> Signup and view all the answers

    What is the focus of the description provided?

    <p>Tool geometry</p> Signup and view all the answers

    What is the critical aspect of the tool face in relation to the flank?

    <p>The angle between the tool face and the flank</p> Signup and view all the answers

    What is the primary purpose of a face plate in a turning operation?

    <p>To hold the workpiece</p> Signup and view all the answers

    What type of chuck is typically used for holding symmetrical workpieces?

    <p>3-jaw chuck</p> Signup and view all the answers

    What is the primary difference between straight turning and taper turning?

    <p>The diameter of the workpiece</p> Signup and view all the answers

    What is the formula to calculate the average diameter of the ring in a turning operation?

    <p>Davg = (D + d) / 2</p> Signup and view all the answers

    What is the unit of cutting speed in a turning operation?

    <p>m/min</p> Signup and view all the answers

    What is the formula to calculate the cutting time in a turning operation?

    <p>t = l / v</p> Signup and view all the answers

    What is the primary purpose of knurling in a turning operation?

    <p>To create a textured surface</p> Signup and view all the answers

    What is the term for the process of cutting a groove on the external surface of a workpiece?

    <p>External grooving</p> Signup and view all the answers

    Study Notes

    Secondary and Finishing Operations

    • Shiny bearing surfaces of a part cannot be made to their final dimensions and surface finish by any of the processes described before.

    Tool Materials

    • Alloy tool steel
    • High speed steel
    • Carbides
    • Ceramics
    • Diamond

    Machining by Cutting

    • Cutting direction is involved in the process
    • Depth to be cut is a factor
    • Tool and workpiece are involved in the process

    Clearance (Relief) Angle

    • It is the angle between the major flank and the cutting plane
    • Reduces friction between the cutting tool and work-piece, reducing heat and wear of the tool

    Tool (Wedge) Angle

    • It is the angle between the tool face and flank

    Work Piece Holding

    • Face plate can be used
    • 4-jaw chuck can be used
    • 3-jaw chuck can be used
    • Between two centers can be used

    Tool Holding

    • Tool post can be used

    Main Turning Operations

    • Straight turning: involves multiple depths of cut
    • Taper turning: involves a tapered shape
    • Turning and external grooving: involves cutting a groove
    • Facing: involves cutting a flat surface
    • Cutting with a form tool: involves cutting a specific shape
    • Boring and internal grooving: involves cutting a hole and a groove
    • Drilling: involves cutting a hole
    • Recessing and Cutting off: involves cutting a recess and cutting off a piece
    • Threading: involves cutting a thread
    • Knurling: involves cutting a textured surface

    The Turning Process

    • The average diameter of the ring can be calculated using Davg = (D+d) / 2
    • The cutting speed V (m/min) can be calculated using v = (πDN) / 1000
    • The cutting time can be calculated using t = l / v

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    Description

    This quiz covers the processes that cannot be used to achieve final dimensions and surface finish of a part. It explores the limitations of various manufacturing processes.

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