Method and apparatus for trepanning workpieces
US4896944A · kind A · utility
Inventors
Key dates
| Filing date | Jul 25, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Jul 25, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/389
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for trepanning a workpiece by controlling laser energy on variable diameters thereof includes the method steps of directing a collimated beam of energy against the workpiece and shifting and rotating the collimated beam so as to orbit a focal point on the workpiece to change the trepanning diameter. Apparatus for practicing such method includes a lens housing with a lens holder which is easily removable and is also positionable with respect to a reference axis by a pneumatic pressure acting against a spring loaded stop and further including means for rotating the lens housing on the reference axis to orbit the focal point of a collimated beam of laser energy about the reference axis to vary the trepanning diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.