| 摘要 |
A machining-fluid ejection device for a wire electric discharge machining apparatus includes a nozzle for ejecting machining-fluid into an inter-electrode gap between a workpiece (W) and a wire electrode (E), a casing ( 16 ) fixed to a machining head ( 15 ) disposed above or below the workpiece (W), a coupling member ( 18 ) for coupling the casing ( 16 ) and a nozzle ( 17 ), having a predetermined elastic coefficient, and deforming according to the machining-fluid pressure; an assemblage of the coupling member ( 18 ) and the nozzle ( 17 ) has hollow portions, formed with an inlet side internal diameter (D 2 ) and an outlet side internal diameter (D 1 ) on a machining-fluid inlet side and outlet side respectively, whose sectional areas do not change, and a hollow portion, formed with a minimum internal diameter (D 0 ) between the machining-fluid inlet side and the outlet side, whose sectional area does not change. Machining productivity may be raised for nozzle contact machining and nozzle separation machining.
|
