Wire electrode guide apparatus in a wire-cut electric discharge machine
US5045661A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1989 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Nov 3, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wire electrode guide apparatus (1) in a wire-cut electric discharge machine includes a switch valve (80) for supplying pressurized air and preventing the supply of the air to an air pressure-operated actuator (70) for driving a movable piece (40) for three point-support of a wire electrode (3) between the movable piece and a stationary piece. During wire extension, an air supply port (88) of the switch valve is communicated to a switch port (87) thereof through which the pressurized air is supplied to the actuator to move a piston rod (73) of the actuator away from the movable piece to release an urging force acting upon the same, resulting in easy insertion of the wire electrode between the stationary and movable pieces. During electric discharge machining, the switch port is disconnected from the pressurized air supply port to prevent the air supply to the actuator, so that the movable piece is urged by the actuator for wire support. A highly pressurized working fluid injected from a nozzle (51) and penetrating into the actuator through gaps between apparatus components is discharged outside the apparatus through the switch port and a pressure relief port (89) in communication …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.