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
US4696211A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1984 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Oct 18, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9428
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.