Wire electric discharge machining apparatus
AssigneeSodick Co., Ltd.
InventorMasashi Sakaguchi
Life of this patent
Estimating the term…
Abstract
A wire electric discharge machining apparatus includes upper and lower wire guide units including wire guides configured to position and guide a wire electrode and a jet nozzle configured to supply a jet flow coaxially with the wire electrode, and a core holding pad having a through-hole passing therethrough in an upward/downward direction, and in which a plurality of protrusion sections having an equal distance from upper surfaces thereof to a lower surface of the workpiece are formed. The core holding pad is disposed on the lower wire guide unit such that the core holding pad approaches the lower surface of the workpiece as closely as possible.
Claims9
A wire electric discharge machining apparatus for pushing up a core cut out of a workpiece through wire electric discharge machining using a jet pressure of a jet flow and separating the core from the workpiece, the wire electric discharge machining apparatus comprising:
- an upper wire guide unit and a lower wire guide unit including wire guides installed above and below with the workpiece sandwiched therebetween and configured to position and guide a wire electrode, and a jet nozzle being configured to supply a jet flow of a working fluid coaxially with the wire electrode;
- and
- a core holding pad in which a through-hole passing therethrough in an upward/downward direction, a plurality of protrusion sections having an equal distance from upper surfaces thereof to a lower surface of the workpiece, and gaps between the plurality of protrusion sections are formed, and the core holding pad has an upper surface and an outer lateral surface opened through the gaps between the plurality of protrusion sections and connected to the through-hole,
- wherein the core holding pad is disposed on the lower wire guide unit such that the jet nozzle is disposed in the through-hole and the core holding pad approaches the lower surface of the workpiece as closely as possible to hold a lower surface of the core cut out of the workpiece, and
- a working fluid injected during cutting-out and after cutting-out is discharged from the through-hole through the gaps between the plurality of protrusion sections toward the upper surface side and the outer lateral surface side.
A wire electric discharge machining method using a wire electric discharge machining apparatus characterized in that:
- the wire electric discharge machining apparatus comprising:
- an upper wire guide unit and a lower wire guide unit including wire guides installed above and below with the workpiece sandwiched therebetween and configured to position and guide a wire electrode, and a jet nozzle being configured to supply a jet flow of a working fluid coaxially with the wire electrode;
- and a core holding pad,
- the core holding pad has a through-hole passing therethrough in an upward/downward direction, a plurality of protrusion sections having an equal distance from upper surfaces thereof to a lower surface of the workpiece, and gaps between the plurality of protrusion sections, and
- the core holding pad has an upper surface and an outer lateral surface opened through the gaps between the plurality of protrusion sections and connected to the through-hole,
- wherein the core holding pad is disposed on the lower wire guide unit such that the jet nozzle is disposed in the through-hole and the core holding pad approaches the lower surface of the workpiece as closely as possible to hold a lower surface of the core cut out of the workpiece,
- during cutting-out machining, injecting the working fluid from the jet nozzle of the lower wire guide unit toward a machining gap and discharging the working fluid from the through-hole through the gaps between the plurality of protrusion sections toward the upper surface side and the outer lateral surface side of the core holding pad,
- after termination of cutting-out, injecting again the working fluid from the jet nozzle of the lower wire guide unit toward a center of gravity of the core, pushing up the core in a state in which the lower surface of the core is horizontally held by the upper surface of the core holding pad by the jet pressure of the working fluid, and discharging the working fluid from the through-hole through the gaps between the plurality of protrusion sections toward the upper surface side and the outer lateral surface side of the core holding pad.
Dependencies are inferred from the claim text.