Coining process

Coining Process

1. Coining Process By Avinash N. Fulbaria

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.

5. Coining Process

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.

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