Cut-out piece removing method in electric discharge machining and an apparatus therefor
US5183987A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1991 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Dec 5, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and an apparatus for easily and reliably removing cut-out pieces cut out from a workpiece by wire-cut electric discharge machining, in which, upon completion of cutting a piece (41) out, a constraining assembly (63) mounted on the distal end of a piston (62) is brought close to the top surface of the piece under the control of a numerical control unit, and machining fluid is upwardly jetted from a lower nozzle (19) toward the bottom surface of the piece, to thereby hold the piece in the workpiece, with the piece kept away from the lower nozzle and prevented from being detached upwardly from the workpiece. While jetting the machining fluid, a worktable is horizontally moved to cause the cut-out piece to move in unison with the workpiece away from the lower nozzle in the horizontal direction. At a moved position where the machining fluid jet normally no longer acts on the bottom surface of the piece, the table movement is stopped and the machining fluid is downwardly jetted from auxiliary nozzles (70) toward the top surface of the piece, to thereby forcibly drop the piece off the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.