Forging of Metals - PowerPoint PPT Presentation

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Forging of Metals

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Lading-gear components for the C5A and C5B transport aircraft, ... Steps involved in forging a bevel gear with a shaft. Outline of Forging and Related Operations ... – PowerPoint PPT presentation

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Title: Forging of Metals


1
Forging of Metals
2
Introduction
  • A metal is shaped by compressive forces
  • Oldest metal working process 4000BC
  • Can be performed with a hammer and anvil
  • Typical forged products
  • Bolts
  • Rivets
  • Connecting rods
  • Gears

3
Lading-gear components for the C5A and C5B
transport aircraft, made by forging.
  • Steps involved in forging a bevel gear with a
    shaft.

4
Outline of Forging and Related Operations
5
Grain Structure
  • Parts have good strength
  • High toughness
  • Forgings require additional heat treating
  • Fig A part made by three different procedures,
    showing grain flow (a) casting (b) machining (c)
    forging

6
Open-Die Forging
  • Is the simplest forging process
  • Sizes can very from very small parts to very
    large parts

7
Open-Die Forging
  • Upsetting or flat-die forging a solid workpiece
    is placed between flat dies and is compressed
  • Barreling
  • caused by frictional forces at the die-workpiece
    interfaces
  • Can be minimized if a lubricant is used
  • Thermal effects caused by barreling can be
    minimized by using heated dies

8
Open-Die Forging
  • Forging force

9
Impression-Die Closed-Die Forging
  • The workpiece acquires the shape of the die
    cavities while being forged between the two
    shaped dies

10
Impression-Die Closed-Die Forging
  • The blank to be forged is prepared by
  • Cutting from a bar stock
  • Preformed blank
  • Casting
  • Preformed blank from prior forging

11
Impression-Die Closed-Die Forging
  • Fullering edging are used to distribute the
    material
  • Fullering material is distributed away from an
    area
  • Edging material is gathered into an area
  • Blocking rough shaping of the part
  • Impression dies give the part its final shape

12
Precision Forging
  • Used for economic reasons
  • The part formed is close to the final dimensions
  • Less machining is needed
  • Higher capacity equipment is needed
  • Aluminum and Magnesium alloys work well in the
    process

13
Coining
  • Closed-die forging process
  • Used for minting coins, medallions, jewelry
  • Lubricants can not be used in coining
  • Can be used to improve surface finish

14
THE END
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