US3795604A - Electrolytic machining electrode - Google Patents

Electrolytic machining electrode Download PDF

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Publication number
US3795604A
US3795604A US00245375A US3795604DA US3795604A US 3795604 A US3795604 A US 3795604A US 00245375 A US00245375 A US 00245375A US 3795604D A US3795604D A US 3795604DA US 3795604 A US3795604 A US 3795604A
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US
United States
Prior art keywords
electrode
electrolyte
workpiece
guide member
electrolytic machining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00245375A
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English (en)
Inventor
Kinney L Mc
W Ferrin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
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Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US3795604A publication Critical patent/US3795604A/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/14—Making holes
    • B23H9/16—Making holes using an electrolytic jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/14—Making holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/30—Application in turbines
    • F05B2220/302—Application in turbines in gas turbines

Definitions

  • An improved electrode having dual mode capability for use in electrolytic machining, particularly small holes comprises a dielectric electrolyte guide member having a hollow interior adapted to receive and to discharge electrolyte towarda conductive workpiece. Within the hollow interior is a first electrode and carried by the guide mem- -ber ⁇ out'wardly of its dielectric wall is a second electrode, conveniently shaped as a collar, and having a tool surface facing the workpiece.
  • Apparatus adapted for electrolytic machining using such a cathode-tool includes means to supply to the first electrode electric current at a first potential sufiicient to create in the electrolyte directed from the guide member a condition at least of incipient glow, and means to supply to the second electrode electric current at a second .potential less than the first potential to provide electrolytic machining in the normal'electrolysis range below incipient glow.
  • This invention relates to electrochemical material removal and, more particularly, to a dual mode tool and apparatus for cavity or hole generation.
  • Another object is to provide such an electrode which will be capable of the electrolytic generation of a cavity using a stream of cathodically charged electrolyte in a condition at least of incipient glow and be capable of generatl 3,795,604 Patented Mar. 5, 1974 ing a diffuser or tapered mouth by ordinary electrochemical machining in the normal electrolysis range.
  • the present invention in one form, provides an improved cathode-tool for use in apparatus for removing material electrolytically from a conductive workpiece.
  • the apparatus includes means to supply electrical power, an electrolyte supply and means to hold the cathode-tool in opposed relationship with the workpiece.
  • the cathode-tool comprises an electrolyte guide member having dielectric walls defining a hollow interior adapted to receive electrolyte..
  • the guide member terminates in an electrolyte discharge port which directs electrolyte in the stream toward the workpiece.
  • Within the hollow interior is a first elecrode.
  • FIGQl is a fragmentary, partially sectional, partially diagrammatic ⁇ view of the cathode-tool of the present invention in operation;
  • FIG. 2 is a partially sectional, enlarged view of the cathode-tool of FIG. 1;
  • FIG. 3 is a sectional view taken on line 3 3 of FIG. 2.
  • the dual mode operation of the cathode-tool of the present invention involves the direction of a stream of electrolyte 12 in FIG. 1, charged cathodically with respect to workpiece 14 ⁇ from electrolyte discharge port-15 in FIG. 2 toward and into contact with such workpiece.
  • a first electric potential generated from first electric power source shown generally at 20.
  • Such first potential is sufficient to create in the electrolyte stream between first cathode 16 and workpiece 14 a condition at least of incipent glow.
  • the potential impressed by first electric power source 20l is at least about 200 volts.
  • the stream of cathodically charged electrolyte 12 is in the unusual electrical condition at least of incipient glow, it is necessary that the walls of electrolyte guide member 118 contacting the electrolyte be electrically isolated from other components of the system.
  • dielectric is used herein to denote such electrical isolation. Such isolation is necessary from both the electrolyte stream as well as from theanodic workpiece which, as shown in the drawing, the guide member penetrates. This avoids premature dissipation of the electric charge in the electrolyte stream.
  • the electrolyte guide member is made of glass.
  • a second electrode 22 Carried by and electrically isolated from guide member 18, outwardly of its walls, is a second electrode 22 shown in the drawing as a shaped metal collar surrounding guide member 18.
  • Second electrode 22 preferably includes a dielectric surface or coating 26, other than on tool surface 24, to avoid stray electrolytic action with the workpiece.
  • Tool surface 24 is positioned so that it will electrolytically remove material from workpiece 14 in a desired contour, for example as shown in FIG. 3. This creates a diifuser mouth in the entrance of the hole which was created by the action of cathodically charged stream of electrolyte 12 on workpiece y14.
  • a second potential is impressed between electrode 22 and workpiece 14 by second electric power source shown generally at 28 in FIG. l.
  • Such second electric potential is less than the irst electric potential impressed between rst electrode 16 and anodic workpiece 14. Also, it is less than the potential which is suflicient to create in the eleca'aaeot trolyte the condition at least of incipient glow discussed p
  • Electrolytewhich supports the electrolytic machining action between second electrode l22 and the workpiece comes from the same electrolyte source 30 as that used to produce cathodic electrolyte stream 12. Initially stre '112, in the condition at least of incipient glow, contacts the workpiece and participates in theenhanced electrolytic material removal discussed above.
  • electrolyte illow 32 between the workpiece and tool surface 24.
  • second electrolyte power source 218 impresses electric potential between second ⁇ electrode 22 and-workpiece 14 to make the second electrode cathodic with respect to the workpiece, normal electrolytic machining occurs between the i second electrode and the workpiece as the second electrode approaches the workpiece.
  • a cathode-tool comprising:
  • an electrolyte guide member having a Wall of a dielectric material deiining a hollow interior adapted to receive electrolyte and terminating in an electrolyte discharge port which directs electrolyte in a stream toward the workpiece;
  • the wall of the electrolyte guide member being located betweenV and extending beyond the lirst and second cathodes.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
US00245375A 1972-04-19 1972-04-19 Electrolytic machining electrode Expired - Lifetime US3795604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24537572A 1972-04-19 1972-04-19

Publications (1)

Publication Number Publication Date
US3795604A true US3795604A (en) 1974-03-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00245375A Expired - Lifetime US3795604A (en) 1972-04-19 1972-04-19 Electrolytic machining electrode

Country Status (8)

Country Link
US (1) US3795604A (fr)
JP (1) JPS4921342A (fr)
BE (1) BE795869A (fr)
CA (1) CA1006846A (fr)
DE (1) DE2311695A1 (fr)
FR (1) FR2180987A1 (fr)
GB (1) GB1433033A (fr)
IT (1) IT983838B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3880745A (en) * 1974-03-28 1975-04-29 United Aircraft Corp Helically fluted deep hole cathode and method of making same
US4002518A (en) * 1974-03-28 1977-01-11 United Technologies Corporation Helically fluted deep hole cathode and method of making same
US4721838A (en) * 1984-10-29 1988-01-26 Abdukarimov Erkin T Tool for electrical discharge piercing of intricately-shaped holes and method of using same
WO1988010017A1 (fr) * 1987-06-01 1988-12-15 Technical Manufacturing Systems, Inc. Electrode d'usinage par procede electrolytique et procede de formage d'une telle electrode
US5418345A (en) * 1994-02-28 1995-05-23 United Technologies Corporation Method for forming shaped passages
WO2016023865A1 (fr) * 2014-08-13 2016-02-18 pEMTec SNC Dispositif et procédé d'usinage électrochimique dans le contour de pièces à symétrie de rotation
US11241751B2 (en) * 2016-06-30 2022-02-08 General Electric Company Drilling tool for use in machining a conductive work piece

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039444U (ja) * 1983-08-22 1985-03-19 株式会社新潟鐵工所 位置決め装置
JPH0611733Y2 (ja) * 1986-10-30 1994-03-30 日東工器株式会社 ワ−ク取り付け用パレツト
JPH0475852A (ja) * 1990-07-12 1992-03-10 Canon Inc ターレツト式実装機における基板回転機構
US5605639A (en) * 1993-12-21 1997-02-25 United Technologies Corporation Method of producing diffusion holes in turbine components by a multiple piece electrode
DE102015219233A1 (de) * 2015-10-06 2017-04-06 Continental Automotive Gmbh Vorrichtung zum Bearbeiten eines Werkstücks für einen Fluidinjektor und Verfahren zum Herstellen eines Düsenkörpers für einen Fluidinjektor
CN108188513A (zh) * 2018-01-02 2018-06-22 青岛理工大学 一种用于激光电化学复合加工的双刃环形电极

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3880745A (en) * 1974-03-28 1975-04-29 United Aircraft Corp Helically fluted deep hole cathode and method of making same
US4002518A (en) * 1974-03-28 1977-01-11 United Technologies Corporation Helically fluted deep hole cathode and method of making same
US4721838A (en) * 1984-10-29 1988-01-26 Abdukarimov Erkin T Tool for electrical discharge piercing of intricately-shaped holes and method of using same
WO1988010017A1 (fr) * 1987-06-01 1988-12-15 Technical Manufacturing Systems, Inc. Electrode d'usinage par procede electrolytique et procede de formage d'une telle electrode
US4819325A (en) * 1987-06-01 1989-04-11 Technical Manufacturing Systems, Inc. Method of forming electro-discharge machining electrode
US5418345A (en) * 1994-02-28 1995-05-23 United Technologies Corporation Method for forming shaped passages
WO2016023865A1 (fr) * 2014-08-13 2016-02-18 pEMTec SNC Dispositif et procédé d'usinage électrochimique dans le contour de pièces à symétrie de rotation
US11241751B2 (en) * 2016-06-30 2022-02-08 General Electric Company Drilling tool for use in machining a conductive work piece

Also Published As

Publication number Publication date
FR2180987A1 (fr) 1973-11-30
CA1006846A (en) 1977-03-15
IT983838B (it) 1974-11-11
GB1433033A (en) 1976-04-22
JPS4921342A (fr) 1974-02-25
DE2311695A1 (de) 1973-10-25
BE795869A (fr) 1973-06-18

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