Patent US4193852A successfully refreshed from Google Patents.
US4193852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electrical machining with a multi-guided travelling electrode
Assignee: Japan Kinoko Research Center Foundation
•
Filing: 1978-06-13
•
Granted: 1980-03-18
•
Expires: 1998-06-13
Abstract
Abstract A traveling wire electrical machining system makes use of a single-strand traveling wire which is guided in a plurality of passes across a workpiece to cut through the latter at a plurality of parallel locations. According to the invention, the machining power supply has a plurality of outputs each of which is connected to a respective stretch of the traveling wire, thereby equalizing the machining current for each of the multiple stretches.
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
B; B23; B23H; B23H5/00; B23H5/06; B23H7/00; B23H7/02
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
90 words
A method of operating a traveling-wire electrical machining apparatus wherein a single-strand traveling wire is guided in a plurality of passes in juxtaposition with a workpiece, said method comprising the steps of: relatively displacing said workpiece and said wire so that respective stretches of the wire cut through said workpiece at respective locations; applying a machining liquid to said locations; and applying across the workpiece and each of said stretches individually a machining current from a common power supply, thereby equalizing the current distribution to said stretches of said wire.
Claim 2
Independent Claim
90 words
A method of operating a traveling-wire electrical machining apparatus wherein a single-strand traveling wire is guided in a plurality of passes in juxtaposition with a workpiece, said method comprising the steps of: relatively displacing said workpiece and said wire so that respective stretches of the wire cut through said workpiece at respective locations; applying a machining liquid to said locations; and applying across the workpiece and each of said stretches individually a machining current from a common power supply, thereby equalizing the current distribution to said stretches of said wire.
Claim 3
Dependent Claim
13 words
The method defined in claim 1 wherein said machining liquid is distilled water.
Claim 4
Dependent Claim
13 words
The method defined in claim 1 wherein said machining liquid is an electrolyte.
Claim 5
Dependent Claim
15 words
The method defined in claim 1 wherein said machining liquid contains abrasive particles in suspension.
Claim 6
Dependent Claim
39 words
The method defined in claim 4 wherein said abrasive particles are composed of at least one substance selected from the group consisting of diamond, boron nitride, boron carbide, silicon carbide, zinc oxide, silicon oxide, aluminum oxide and silicon nitride.
Claim 7
Dependent Claim
15 words
The method defined in claim 1 wherein said wire electrode has abrasive particles bonded thereon.
Claim 8
Dependent Claim
39 words
The method defined in claim 6 wherein said abrasive particles are composed of at least one substance selected from the group consisting of diamond, boron nitride, boron carbide, silicon carbide, zinc oxide, silicon oxide, aluminum oxide and silicon nitride.
Claim 9
Dependent Claim
21 words
The method defined in claim 1 wherein said wire electrode has a diameter in the range between 0.05 and 0.5 mm.
Claim 10
Dependent Claim
31 words
The method defined in claim 8 wherein said wire electrode is composed at least in part of a substance selected from the group consisting of piano wire, tungsten, copper and brass.
Claim 11
Dependent Claim
49 words
The method defined in claim 1 wherein said workpiece consists of a material of a specific resistivity of at least 50 ohm-cm, said machining fluid having a specific resistivity of at least 10 3 ohm-cm, and said common power supply has a voltage level of at least 50 volts.
Claim 12
Dependent Claim
41 words
The method defined in claim 10 wherein said machining fluid includes distilled water prepared by ion-exchange treatment and a rust-preventing agent in an amount sufficient to render the water to be of a specific resistivity of at least 10 3 ohm-cm.
Claim 13
Independent Claim
114 words
An apparatus for electrical machining comprising: a single continuous wire-type electrode; means for axially moving said electrode; support members for multi-guiding said electrode in a plurality of turns in the form of the plurality of moving wire segments extending in parallel with one another in juxtaposition with a workpiece to be machined thereby across respective machining gaps; means for supplying said respective machining gaps with a machining fluid; and a multiple-output single power supply for energizing said wire electrode with said workpiece, said power having an individual output provided respectively for each moving wire segment and a common output of a polarity opposite to that of the individual outputs and connectible to the workpiece.
Claim 14
Independent Claim
114 words
An apparatus for electrical machining comprising: a single continuous wire-type electrode; means for axially moving said electrode; support members for multi-guiding said electrode in a plurality of turns in the form of the plurality of moving wire segments extending in parallel with one another in juxtaposition with a workpiece to be machined thereby across respective machining gaps; means for supplying said respective machining gaps with a machining fluid; and a multiple-output single power supply for energizing said wire electrode with said workpiece, said power having an individual output provided respectively for each moving wire segment and a common output of a polarity opposite to that of the individual outputs and connectible to the workpiece.
Claim 15
Dependent Claim
40 words
The apparatus defined in claim 12 wherein said power supply comprises a first output terminal connected to said workpiece and a plurality of second output terminals which correspond in number to and are respectively connected to said different wire segments.
Claim 16
Dependent Claim
15 words
The apparatus defined in claim 12 wherein said wire electrode has abrasive particles bonded thereon.
Claim 17
Dependent Claim
26 words
The apparatus defined in claim 12, further comprising means for supplying abrasive particles to the regions of the machining gaps in suspension in said machining fluid.
Claim 18
Dependent Claim
42 words
The apparatus defined in claim 14 or claim 15 wherein said abrasive particles are composed of at least one substance selected from the group consisting of diamond, boron nitride, boron carbide, silicon carbide, zinc oxide, silicon oxide, aluminum oxide and silicon nitride.
Claim 19
Dependent Claim
21 words
The apparatus defined in claim 12 wherein said wire electrode has a diameter in the range between 0.5 to 0.5 mm.
Claim 20
Dependent Claim
31 words
The apparatus defined in claim 17 wherein said wire electrode is composed at least in part of a substance selected from the group consisting of piano wire, tungsten, copper and brass.
Claim 21
Independent Claim
228 words
An apparatus for electrical machining comprising: a single continuous wire-type electrode; means for axially moving said electrode; support members for multi-guiding said electrode in a plurality of turns in the form of the plurality of moving wire segments extending in parallel with one another in juxtaposition with a workpiece to be machined thereby across respective machining gaps; means for supplying said respective machining gaps with a machining fluid; and a multiple-output single power supply for energizing said wire electrode and said workpiece, said power supply having an individual output provided respectively for each moving wire segment, said power supply comprising: a first output terminal connected to said workpiece and a a plurality of second output terminals which correspond in number to and are respectively connected to said different wire segments; input means for receiving a commercial alternating current; a rectifier for converting said commercial alternating current to a direct current; means for pulsing said direct current to produce a high-frequency alternating-current or pulse output at a frequency much higher than that of said commercial alternating current; and a transformer for transforming the voltage magnitude of said high-frequency output to a desired level, said transformer having a primary winding operatively connected to said pulsing means and a plurality of secondary windings corresponding in number to and being connected at said output terminals to said plurality of wire segments, respectively.
Claim 22
Independent Claim
228 words
An apparatus for electrical machining comprising: a single continuous wire-type electrode; means for axially moving said electrode; support members for multi-guiding said electrode in a plurality of turns in the form of the plurality of moving wire segments extending in parallel with one another in juxtaposition with a workpiece to be machined thereby across respective machining gaps; means for supplying said respective machining gaps with a machining fluid; and a multiple-output single power supply for energizing said wire electrode and said workpiece, said power supply having an individual output provided respectively for each moving wire segment, said power supply comprising: a first output terminal connected to said workpiece and a a plurality of second output terminals which correspond in number to and are respectively connected to said different wire segments; input means for receiving a commercial alternating current; a rectifier for converting said commercial alternating current to a direct current; means for pulsing said direct current to produce a high-frequency alternating-current or pulse output at a frequency much higher than that of said commercial alternating current; and a transformer for transforming the voltage magnitude of said high-frequency output to a desired level, said transformer having a primary winding operatively connected to said pulsing means and a plurality of secondary windings corresponding in number to and being connected at said output terminals to said plurality of wire segments, respectively.
Claim 23
Dependent Claim
38 words
The apparatus defined in claim 19 wherein each individual secondary winding is connected to each wire segment via a rectifier so that a succession of unidirectional pulses are applied between each of the wire segments and the workpiece.
Claim 24
Dependent Claim
15 words
The apparatus defined in claim 19 wherein said wire electrode has abrasive particles bonded thereon.
Claim 25
Dependent Claim
31 words
The apparatus defined in claim 19, further comprising means for supplying abrasive particles to machining gaps between each of said wire segments and said workpiece in suspension in said machining fluid.
Claim 26
Dependent Claim
18 words
The apparatus defined in claim 19 wherein said wire electrode has a diameter between 0.05 and 0.5 mm.
Claim 27
Dependent Claim
31 words
The apparatus defined in claim 19 wherein said wire electrode is composed at least in part of a substance selected from the group consisting of piano wire, tungsten, copper and brass.
Claim 28
Independent Claim
150 words
An apparatus for electrical machining comprising: a single continuous wire-type electrode; means for axially moving said electrode; support members for multi-guiding said electrode in a plurality of turns in the form of the plurality of moving wire segments extending in parallel with one another in juxtaposition with a workpiece to be machined thereby across respective machining gaps; means for supplying said respective machining gaps with a machining fluid; and a multiple-output single power supply for energizing said wire electrode and said workpiece, said power supply having an individual output provided respectively for each moving wire segment, said power supply comprising: a first output terminal connected to said workpiece and a plurality of second output terminals which correspond in number to and are respectively connected to said different wire segments; and a direct-current source having a plurality of resistors corresponding in number to and connected to said plurality of wire segments.
Claim 29
Independent Claim
150 words
An apparatus for electrical machining comprising: a single continuous wire-type electrode; means for axially moving said electrode; support members for multi-guiding said electrode in a plurality of turns in the form of the plurality of moving wire segments extending in parallel with one another in juxtaposition with a workpiece to be machined thereby across respective machining gaps; means for supplying said respective machining gaps with a machining fluid; and a multiple-output single power supply for energizing said wire electrode and said workpiece, said power supply having an individual output provided respectively for each moving wire segment, said power supply comprising: a first output terminal connected to said workpiece and a plurality of second output terminals which correspond in number to and are respectively connected to said different wire segments; and a direct-current source having a plurality of resistors corresponding in number to and connected to said plurality of wire segments.
Claim 30
Dependent Claim
51 words
The apparatus as defined in claim 25, further comprising a switching network arranged between said direct-current source and said resistors for producing a succession of machining pulses to be delivered to each machining gap between each of said wire segments and the workpiece via the respective one of said output resistors.
Claim 31
Dependent Claim
16 words
The apparatus as defined in claim 25 wherein said wire electrode has abrasive particles bonded thereon.
Claim 32
Dependent Claim
31 words
The apparatus defined in claim 25, further comprising means for supplying abrasive particle to machining gaps between each of said wire segments and said workpiece in suspension in said machining fluid.
Claim 33
Dependent Claim
18 words
The apparatus defined in claim 25 wherein said wire electrode has a diameter between 0.05 and 0.5 mm.
Claim 34
Dependent Claim
31 words
The apparatus defined in claim 25 wherein said wire electrode is composed at least in part of a substance selected from the group consisting of piano wire, tungsten, copper and brass.
References Cited (Backward Citations)
US2526423A
Cited
US3538289A
Cited
US3436322A
Cited
US3642601A
Cited
US3831576A
Cited
US3928163A
Cited
US3928163B1
Cited
US4052274A
Cited
US4103137A
Cited
US4052584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-18 | 1983-09-17 | 1984-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-18 | 1987-09-17 | 1988-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-18 | 1991-09-17 | 1992-03-18 | $7700.00 | Window Closed / Lapsed |