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Forging @ Www.07 Met.Tk

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Transcript

  • 1.  
  • 2.
    • FORGING
    • Forging is the working into a useful shape by hammering or pressing.
    • A wide variety of forging machinery.
    • Small to large components, such as a bolt to a turbine rotor or an entire airplane wing.
    • Most forging operations are carried out hot.
  • 3.
    • Two major classes of equipment :
    • The forging hammer or drop hammer delivers rapid impact blows to the surface of the metal.
    • The forging press subject the metal to a slow-speed compressive force.
    • Two broad categories of forging processes:
    • Open-die forging
    • Closed-die forging
  • 4.
    • Open-die forging is carried out between flat dies or dies of very simple shape.
    • Mostly for large objects or when the number of parts produced is small.
    • Often open-die forging is used to preform the work-piece for closed-die forging.
    • In closed-die forging the work-piece is deformed between two die halves which carry the impression of the desired final shape.
    • The work-piece is deformed under high pressure in a closed cavity, and thus precision forgings with close dimensional tolerances can be produced
  • 5. Forging operations: (a,b) Edging; (c) Fullering; (d) Drawing; (e) Swaging; (f) Piercing; (g) Punching.
  • 6. Schematic drawings of forging equipment.
  • 7.  
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