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venkatking.v
venkatking.v • Jul 6, 2012

De formation process

What is different between coining, embossing and knurling..?
All are making impression on the work piece.I don't know the exact different between among them..can u tell to me..?
zaveri
zaveri • Jul 6, 2012
Knurling is a process of making an array of diamond-shaped indents on a smooth surface, to improve gripping. on cylindrical surfaces this can be done using a lathe machine fixed with a knurling tool.

embossing is a process of creating raisied features on a smooth surfaces, such as in coins.

but coining is a mettalurgical process. it is a process of hardening the material by applying high stress and thus reducing the grain size. the finer the grains, the more stronger a material is.
Knurling is a process of making an array of diamond-shaped indents on a smooth surface, to improve gripping. on cylindrical surfaces this can be done using a lathe machine fixed with a knurling tool.
Emobossing has same design on the both side of the sheet metal.
This process can be made by means of matched male and female roller dies, or by passing sheet or a strip of metal between rolls of the desired pattern.
Coining operation produces different shape or design on both side of the sheet metal.
Example : coin where both side have different design.

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