US3740519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for electro-erosion machining electrode
Assignee: Individual
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Filing: 1972-03-27
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Granted: 1973-06-19
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Expires: 1992-03-27
Abstract
Abstract Apparatus for and a method of electro erosion machining with increased stock removal rate with a fine finish is disclosed. The electro erosion machining apparatus disclosed includes an electrode having a plurality of separate portions insulated from each other and separately connected to a single source of pulsed electrical energy whereby the current from the source of pulsed electrical energy is divided among the separate electrode portions to provide a small current for each electrode. The method of the invention includes varying the current passed through each portion of the electrode, limiting the current through each portion of the electrode to a single direction and moving the electrode transversely of the direction of movement of the electrode toward a workpiece during electrical erosion machining to provide rapid total form machining.
Inventors
- 👤 Connor T O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:26
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
337 words
Apparatus for electrical erosion of a workpiece comprising a machine tool including a work tank for receiving a workpiece to be machined, a ram movable with respect to the tank toward and away from a workpiece positioned therein, an electrode secured to the ram including an insulating base, means secured to the base for securing the electrode to a ram or the like, a plurality of openings extending through the insulating base, a plurality of separate electrode portions having threaded recesses in one end thereof, hollow tubular members threaded at opposite ends extending through the openings in the insulating base and engaged at one end in the threaded recess in corresponding electrode portions on one side of the insulating base and nuts threadedly secured to the other ends of the tubular members on the other side of the insulating base for securing the separate electrode portions to the insulating base in spaced apart relation with respect to each other, insulating means positioned between the separate electrode portions for maintaining them in spaced apart relation, extending over most of the length of the electrode portions but in spaced relation from the end thereof opposite said one end of the electrode portions, a servo system operable in response to an electrical signal between the electrode and workpiece for maintaining a predetermined gap between the electrode and workpiece, means connected to the machine tool for flushing a fluid through the gap between the electrode and workpiece, a single power supply for supplying electrical energy to each of the separate portions of the electrode simultaneously to produce electro erosion or the workpiece, a separate diode and variable resistor connected in series between the power supply and each of the separate portions of the electrode for limiting current through each separate portion of the electrode individually and restricting the current therethrough to a unidirectional current, and means positioned between the ram and electrode for reciprocating the electrode transversely of the direction of movement of the ram toward and away from a workpiece.
Claim 2
Dependent Claim
337 words
Apparatus for electrical erosion of a workpiece comprising a machine tool including a work tank for receiving a workpiece to be machined, a ram movable with respect to the tank toward and away from a workpiece positioned therein, an electrode secured to the ram including an insulating base, means secured to the base for securing the electrode to a ram or the like, a plurality of openings extending through the insulating base, a plurality of separate electrode portions having threaded recesses in one end thereof, hollow tubular members threaded at opposite ends extending through the openings in the insulating base and engaged at one end in the threaded recess in corresponding electrode portions on one side of the insulating base and nuts threadedly secured to the other ends of the tubular members on the other side of the insulating base for securing the separate electrode portions to the insulating base in spaced apart relation with respect to each other, insulating means positioned between the separate electrode portions for maintaining them in spaced apart relation, extending over most of the length of the electrode portions but in spaced relation from the end thereof opposite said one end of the electrode portions, a servo system operable in response to an electrical signal between the electrode and workpiece for maintaining a predetermined gap between the electrode and workpiece, means connected to the machine tool for flushing a fluid through the gap between the electrode and workpiece, a single power supply for supplying electrical energy to each of the separate portions of the electrode simultaneously to produce electro erosion or the workpiece, a separate diode and variable resistor connected in series between the power supply and each of the separate portions of the electrode for limiting current through each separate portion of the electrode individually and restricting the current therethrough to a unidirectional current, and means positioned between the ram and electrode for reciprocating the electrode transversely of the direction of movement of the ram toward and away from a workpiece.
Claim 3
Dependent Claim
208 words
An electrode for use in electrical erosion of a workpiece or the like, comprising an insulating base, means secured to the base for securing the electrode to a ram or the like, a plurality of openings extending through the insulating base, a plurality of separate electrode portions having threaded recesses in one end thereof, hollow tubular members threaded at opposite ends extending through the openings in the insulating base and engaged at one end in the threaded recess in corresponding electrode portions on one side of the insulating base and nuts threadedly secured to the other ends of the tubular members on the other side of the insulating base for securing the separate electrode portions to the insulating base in spaced apart relation with respect to each other, insulating means positioned between the separate electrode portions for maintaining them in spaced apart relation, extending over most of the length of the electrode portions but in spaced relation from the end thereof opposite said one end of the electrode portions and a separate diode and variable resistor connected in series with each of the separate portions of the electrode for limiting current through each separate portion of the electrode individually and restricting the current therethrough to a unidirectional current.
Claim 4
Dependent Claim
208 words
An electrode for use in electrical erosion of a workpiece or the like, comprising an insulating base, means secured to the base for securing the electrode to a ram or the like, a plurality of openings extending through the insulating base, a plurality of separate electrode portions having threaded recesses in one end thereof, hollow tubular members threaded at opposite ends extending through the openings in the insulating base and engaged at one end in the threaded recess in corresponding electrode portions on one side of the insulating base and nuts threadedly secured to the other ends of the tubular members on the other side of the insulating base for securing the separate electrode portions to the insulating base in spaced apart relation with respect to each other, insulating means positioned between the separate electrode portions for maintaining them in spaced apart relation, extending over most of the length of the electrode portions but in spaced relation from the end thereof opposite said one end of the electrode portions and a separate diode and variable resistor connected in series with each of the separate portions of the electrode for limiting current through each separate portion of the electrode individually and restricting the current therethrough to a unidirectional current.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |