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Concept
 Introduction
 Techniques of Coining
 Advantages of Coining
 Industrial Application
Introduction
Coining is a cold working process that uses a great deal
of force to plastically deform a workpiece, so it
conforms to a die. Coining can be done using a gear
driven press, a mechanical press, or more commonly a
hydraulically actuated press. Coining typically requires
higher tonnage presses than stamping, because the
workpiece is plastically deformed and nor actually cut.
The coining process is preferred when there is a high
tonnage.
Techniques of Coining
Completely closed dies are used for this process.
High pressure is applied on the closed die containing
the metal work piece.
As a result of the high deformative stress, the metal
conforms to the shape of the die.
Lubricants are not used in coining as they are
incompressible.
Coining Process
Advantages Of Coining
Provide finer and detailed surface finish
Provide accurate bends in a consistent manner
Does not require expensive machinery
The work hardened surface can resist impact and
abrasion
Eliminate the need for complex finishing processes
Plastic flow reduces the surface grain size and work
hardens the surface.
Industrial Applications
Minting of coins and medallions
Making of jewelry
Making badges, buttons, precision- energy springs
Making complex electronic parts
Making precision parts that require finer polished
surface finishes.
END

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Coining process

  • 1.
  • 2. Concept  Introduction  Techniques of Coining  Advantages of Coining  Industrial Application
  • 3. Introduction Coining is a cold working process that uses a great deal of force to plastically deform a workpiece, so it conforms to a die. Coining can be done using a gear driven press, a mechanical press, or more commonly a hydraulically actuated press. Coining typically requires higher tonnage presses than stamping, because the workpiece is plastically deformed and nor actually cut. The coining process is preferred when there is a high tonnage.
  • 4. Techniques of Coining Completely closed dies are used for this process. High pressure is applied on the closed die containing the metal work piece. As a result of the high deformative stress, the metal conforms to the shape of the die. Lubricants are not used in coining as they are incompressible.
  • 6. Advantages Of Coining Provide finer and detailed surface finish Provide accurate bends in a consistent manner Does not require expensive machinery The work hardened surface can resist impact and abrasion Eliminate the need for complex finishing processes Plastic flow reduces the surface grain size and work hardens the surface.
  • 7. Industrial Applications Minting of coins and medallions Making of jewelry Making badges, buttons, precision- energy springs Making complex electronic parts Making precision parts that require finer polished surface finishes.
  • 8. END