Wednesday, 6 November 2013

Cogging

Successively reducing the thickness of a bar with open die forging
•Also called drawing out
•Reducing the thickness of a long section of a bar without
excessive forces or machining

a cogging operation on a rectangular bar. Blacksmiths use this process to reduce the thickness of bars by hammering the part on an anvil. Note the barreling of the workpiece.




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