Method and apparatus for nibbling cutouts with rectilinear and curvilinear contours by rotation of tooling with cutting surfaces of rectilinear and curvilinear contours and novel tooling therefor
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United States of America Patent
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Sep 29, 1987
Grant Date -
N/A
app pub date -
Oct 18, 1984
filing date -
Oct 18, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A punch press has a punch support and die support which are rotatable about a common vertical axis, and a drive mechanism for rotating and effecting the reorientation of the tooling relative to the X and Y axes of the punch press. In this fashion, rotation of the tooling will enable reorientation of single cutting surface, and location of various of the differently contoured cutting surfaces at the desired cutting position to effect cutouts of different contours or angular orientation in a workpiece relative to the X and Y axes. The punch has a cutting portion which is of a cross section providing at least one arcuate cutting surface A.sup.1 defined by the radius R.sup.1 and at least one rectilinear cutting surface A.sup.2. In accordance with one embodiment, the punch tooling is desirably of elongated cross section with a length L in its elongated axis and a width W in its transverse axis which is less than 1/2 L. Movement of the sheet material along the X and Y axes together with rotation of the tooling enables relatively smooth curvilinear and rectilinear contoured surface portions to be nibbled with a single set, or limited number of sets, of tooling.
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