| 摘要 |
<p>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 A1 defined by the radius R1 and at least one rectilinear cutting surface A2. 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.</p> |
