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Differentiate between blanking and piercing with diagram.
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written 8.5 years ago by
teamques10
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| Blanking | Piercing |
|---|---|
| Punching or blanking is a process in which the punch removes a portion of material from the larger piece or a strip of sheet metal. If the small removed piece is the useful part and the rest is scrap, the operation is called blanking | It is a process by which a hole is cut (or torn) in metal. It is different from punching in that piercing does not generate a slug. Instead, the metal is pushed back to form a jagged flange on the back side of the hole. |
| The piece cut out is called as blank and may be further processed. Blanks are often cut out of a sheet or strip | A pierced hole looks somewhat like a bullet hole in a sheet of metal |
| Blanking wastes certain amount of material. When designing a sheet metal blanking process the geometry of blanks should be nestled as efficiently as possible to minimize the material waste. | Size of the component is generally larger in piercing than blanking. |
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