Punching blanks or articles with or without obtaining scrap (cutting nails or pins from strips or sheet material B21G3/26); Notching

Child Classifications

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• B21D 28/04 Centering the work; Positioning the tools IPC+CPC Available in IPC and CPC
• B21D 28/06 Making more than one part out of the same blank; Scrapless working IPC+CPC Available in IPC and CPC
• B21D 28/10 Incompletely punching in such a manner that the parts are still coherent with the work IPC+CPC Available in IPC and CPC
• B21D 28/12 Punching using rotatable carriers +1 CPC IPC+CPC Available in IPC and CPC
• B21D 28/14 Dies (ejecting or stripping-off devices arranged in punching machines or tools B21D45/00) +1 CPC IPC+CPC Available in IPC and CPC
• B21D 28/16 Shoulder or burr prevention IPC+CPC Available in IPC and CPC
• B21D 28/18 Yieldable, e.g. rubber, punching pads IPC+CPC Available in IPC and CPC
• B21D 28/20 Applications of drives IPC+CPC Available in IPC and CPC
• B21D 28/22 Notching the peripheries of circular blanks, e.g. laminations for dynamo-electric machines IPC+CPC Available in IPC and CPC