Wire electrode type electric discharge machining device with preventable application of external force to its lower arm
US4808786A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Oct 7, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wire electrode type electric discharge machining device including a wire electrode confronting a workpiece with a small space therebetween, wherein electric discharge is caused to take place in the small space to machine the workpiece; an upper wire guide for slidably supporting the wire electrode above the workpiece; a lower wire guide for slidably supporting the wire electrode below the workpiece; a driver for supporting and moving the workpiece relative to the wire electrode in the horizontal direction; a lower arm for holding the lower wire guide at a position confronting the upper wire guide means. The electric discharge machining device further includes a protecting cover for covering the lower arm with a space therebetween, a splash preventing device which is movable with expansion and contraction with the movement of the workpiece for preventing machining solution jetted towards the small space between the workpiece and the wire electrode from splashing, and a holding device for fixedly holding the splash preventing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.