Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1982-09-28
1984-11-13
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
With testing or indicating
30360, B23Q 1700, B26F 100
Patent
active
044817002
ABSTRACT:
A method and apparatus for cutting a hole with at most one line of symmetry in, for example, a sheet metal panel is disclosed wherein a plurality of holes are first drilled in the panel and thereafter a punch is positioned on one side of the panel and a die on the other side which are threadedly coupled together by a plurality of bolts passing through the panel holes so that tightening one or more of the bolts will draw the punch and die toward one another forming the desired hole. Typically, a central one of three bolts is tightened to perform the cutting operation while the remaining two are primarily for punch and die alignment purposes but may also be tightened to compensate for misalignment or when cutting a particularly heavy gauge sheet metal panel. Additional threaded holes in the die may be provided for threadedly ejecting a slug cut from a panel and additional punch supported pointed screws for center-punching the panel for a subsequent drilling operation may also be included.
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Goldberg Howard N.
Nichols Steven
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