US3616427A - Apparatus for the electrolytic treatment of metallic pieces - Google Patents

Apparatus for the electrolytic treatment of metallic pieces Download PDF

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Publication number
US3616427A
US3616427A US760475A US3616427DA US3616427A US 3616427 A US3616427 A US 3616427A US 760475 A US760475 A US 760475A US 3616427D A US3616427D A US 3616427DA US 3616427 A US3616427 A US 3616427A
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United States
Prior art keywords
movable electrode
treated
electrolyte
gaseous jet
electrode
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Expired - Lifetime
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US760475A
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English (en)
Inventor
Paul Marie Gaston Linden
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Safran Aircraft Engines SAS
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SNECMA SAS
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Publication date
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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
    • B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
    • B23H3/10—Supply or regeneration of working media

Definitions

  • the apparatus comprises a movable electrode disposed near to the work piece to be treated, a current generator whose two terminals are respectively connected to the electrode and to the work piece, and supply means for depositing an electrolyte between the workpiece and the electrode.
  • Deflection means are provided for giving the layer of electrolyte the character of a thin film. These deflection means can be in the form of a blade, flexible or rigid, urged elastically against the electrode, or in the form of a gaseous jet tangent to or striking the electrode at a point between the supply means and the workpiece.
  • This invention relates to apparatus for the electrolytic treatment of metallic pieces, that is to say for removing a certain quantity of the metal constituting the piece subjected to the treatment or for depositing on that piece a certain quantity of a partly metallic material.
  • the apparatus to which the present invention is directed comprises at least one electrode movable with respect to the piece to be treated and disposed near to this piece, a current generator whose two terminals are respectively connected to the movable electrode and to the piece to be treated, and supply means arranged so as to bring an electrolyte of composition appropriate for the treatment envisaged to occupy the space comprised between the piece to be treated and the movable electrode.
  • the invention is more particularly, but not exclusively, concerned with apparatus of this type intended for the electrolytic treatment consisting of removing a certain quantity of the metal constituting the piece to be treated.
  • the electrolytic treatment takes place in the regions where an intimate connection between the piece to be treated and the movable electrode is ensured by the electrolyte.
  • the supply means deposited the electrolyte on the movable electrode in the form of a relatively thick layer.
  • This relative thickness of the layer and the small value that it is appropriate to give to the distance between the movable electrode and the piece to be treated in order that the treatment envisaged can be effected in favorable conditions (minimum duration of the treatment and minimum consumption of energy) were then the cause of an accumulation of electrolyte outside of the space separating the movable electrode from the piece to be treated, which accumulation did not permit the localization of the treatment in a precise manner, that is to say to only the part of the piece to be treated facing the movable electrode.
  • the chief object of this invention is to provide apparatus of the type in question which fulfills, the various requirements of practice, and in particular, which permits the localization of the treatment in a precise manner while avoiding the accumulation of electrolyte outside of the space separating the movable electrode from the piece to be treated.
  • Apparatus of the type in question comprises deflection means acting on the flow of electrolyte between the supply means and the space comprised between the piece to be treated and the movable electrode, these deflection means being arranged so as to cause a decrease of the thickness of the layer of electrolyte deposited on the movable electrode by said supply means, so that this layer of electrolyte has the character of a thin film and preserves this thin film character at least as far as the space comprised between the piece to be treated and the movable electrode.
  • the invention is characterized by the fact that these deflection means comprise essentially, on the one hand, a pressure element constituted by a flexible blade or by a rigid blade, and on the other hand, elastic return means arranged so as to bear this pressure element against the movable electrode.
  • the invention is characterized by the fact that the deflection means are of thegaseous jet" type and comprise essentially at least one nozzle delivering a gaseous jet at high speed, this nozzle being oriented so that the gaseous jet is tangent to or strikes the movable electrode, the point of tangency or the point of impact of the gaseous jet on the movable electrode being situated between the supply means and the piece to be treated.
  • the deflection means are of thegaseous jet" type and comprise essentially at least one nozzle delivering a gaseous jet at high speed, this nozzle being oriented so that the gaseous jet is tangent to or strikes the movable electrode, the point of tangency or the point of impact of the gaseous jet on the movable electrode being situated between the supply means and the piece to be treated.
  • FIG. I shows a schematic view of an apparatus according to a first embodiment of the invention
  • FIG. 2 is an enlarged view explaining the operations of the apparatus shown in FIG. I;
  • FIGS. 3 to 5 illustrate respectively, by partial schematic views, other embodiments of the invention.
  • FIGS. 1 to 5 The embodiments shown in the drawings relate to apparatus for the electrolytic treatment of metallic pieces consisting of removing a certain quantity of the metal constituting the piece to be treated.
  • Such apparatus comprises, as shown in FIGS. 1 to 5,
  • this movable electrode 1 being advantageously constituted by a disc rotating about its axis and carried by a mechanism 3 arranged in a manner to communicate to the movable electrode l a movement tending to move this electrode towards the piece to be treated 2.
  • a current generator 4 preferably a continuous current generator, whose negative terminal is connected to the movable electrode 1 and whose positive terminal is connected to the piece to be treated 2, 1
  • the disc constituting the movable electrode 1 can be entirely or partially metallic and that it can be or not charged with an abrasive.
  • this apparatus comprises deflection means 8 acting on the flow of electrolyte 6 between the supply means 5 and the space 7 comprised between the piece to be treated 2 and the movable electrode 1, these deflection means 8 being arranged so as to cause a decrease of the thickness of the layer of electrolyte 6 deposited on the movable electrode 1 by these supply means 5, so that this layer of electrolyte 6 has the character of a thin film 9 and preserves this thin film character at least as far as the space 7 comprised between the piece to be treated 2 and the movable electrode 1.
  • the clean break of the peripheral part of the thin film 9 is favored by the fact that this thin film 9 is driven with a speed at least equal to the tangential speed of the movable electrode 1 at the level of its greatest radius.
  • the deflection means 8 are of the mechanical type and comprise essentially,
  • a pressure element 10 constituted by a flexible blade (FIG.
  • return means ll arranged so as to bear this pressure element [0 against the movable electrode 1, these return means 11 being constituted by an elastic blade (FIG. I) or by a helical spring (FIG. 3).
  • the deflection means 8 are of the gaseous jet" type, and comprise essentially at least one nozzle 12 delivering a gaseous jet 13 at high speed, this nozzle 12 being oriented so that the gaseous jet 13 is tangent to the movable electrode 1 (FIG 4) or strikes the movable electrode 1 (FIG 5), the point of tangency or the point of impact of this gaseous jet 13 on the movable electrode 1 being situated between the supply means 5 and the piece to be treated 2.
  • the present invention provides apparatus for the electrolytic treatment of metallic pieces for removing a certain quantity of the metal constituting the piece to be treated which permits the localization of the treatment in an extremely precise manner, and, accordingly, permits the realization of very tine machining.
  • Apparatus for the electrolytic treatment of metallic elements comprising, at least one electrode movable with respect to the element to be treated and disposed adjacent the ele' ment to be treated, a current generator having first and second terminals respectively connected to the movable electrode and to the element to be treated, supply means for supplying an electrolyte of a composition appropriate for the treatment envisaged to the space located between the element to be treated and the movable electrode, and deflection means for acting on the flow of electrolyte between the supply means and'the space located between the element to be treated and the movable electrode so as to cause a decrease in the thickness of the layer of electrolyte deposited on the movable electrode by the supply means such that the layer of electrolyte has the character of a thin film and preserves this thin film character as far as the space located between the piece to be treated and the movable electrode, said deflection means comprising a pressure member comprising a blade, and resilient means for urging said pressure member towards said movable electrode, the angle between the pressure
  • said deflection means comprising at least one nozzle for delivering a gaseous jet at high speed, said at least one nozzle being oriented such that the gaseous jet makes contact with the movable electrode, the point of contact between the gaseous jet and the movable electrode being located between the supply means and the element to be treated and the angle between the gaseous jet and an extension of the vector representing the tangential velocity of the movable electrode in the area of said pressure element being less that so that a wedge of electrolyte is formed
  • Apparatus according to claim 4 wherein said at least one nozzle is oriented so that said gaseous jet is tangent to the movable electrode, the point of tangency then being said point of contact.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
US760475A 1967-09-26 1968-09-18 Apparatus for the electrolytic treatment of metallic pieces Expired - Lifetime US3616427A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR122333A FR1544791A (fr) 1967-09-26 1967-09-26 Perfectionnements apportés aux installations pour le traitement électrolytique de pièces métalliques

Publications (1)

Publication Number Publication Date
US3616427A true US3616427A (en) 1971-10-26

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ID=8639010

Family Applications (1)

Application Number Title Priority Date Filing Date
US760475A Expired - Lifetime US3616427A (en) 1967-09-26 1968-09-18 Apparatus for the electrolytic treatment of metallic pieces

Country Status (4)

Country Link
US (1) US3616427A (fr)
CH (1) CH490507A (fr)
FR (1) FR1544791A (fr)
GB (1) GB1235339A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013526A (en) * 1974-04-12 1977-03-22 Inoue-Japan Research Inc. Electrochemical grinding with a conductivity-controlled wheel electrode

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996020060A1 (fr) * 1994-12-28 1996-07-04 Skf Industrial Trading & Development Company B.V. Procede d'usinage electrochimique et palier usine selon ledit procede

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013526A (en) * 1974-04-12 1977-03-22 Inoue-Japan Research Inc. Electrochemical grinding with a conductivity-controlled wheel electrode

Also Published As

Publication number Publication date
GB1235339A (en) 1971-06-09
FR1544791A (fr) 1968-11-08
CH490507A (fr) 1970-05-15

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