Nibbling

Nibbling is a shearing process that utilizes a series of overlapping cuts to make complex shapes from sheet metal.

Process Characteristics

Sheet metal thickness usually does not exceed 0.25 in. 
Utilizes a press with an oblong or rectangular punch and die or shear blade
Machines usually stroke 300 to 900 times per minute
Produces complex shapes form sheet metal material

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Information provided is from Manufacturing Processes Reference Guide by Robert H. Todd, Dell K. Allen, and Leo Alting.--1st ed. Published by Industrial Press Inc., 1994.