EP1902162A1 - Procede et dispositif de traitement d'au moins deux pieces par traitement electrochimique - Google Patents

Procede et dispositif de traitement d'au moins deux pieces par traitement electrochimique

Info

Publication number
EP1902162A1
EP1902162A1 EP06764055A EP06764055A EP1902162A1 EP 1902162 A1 EP1902162 A1 EP 1902162A1 EP 06764055 A EP06764055 A EP 06764055A EP 06764055 A EP06764055 A EP 06764055A EP 1902162 A1 EP1902162 A1 EP 1902162A1
Authority
EP
European Patent Office
Prior art keywords
electrolytic
workpieces
workpiece
treatment solution
processing elements
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.)
Withdrawn
Application number
EP06764055A
Other languages
German (de)
English (en)
Inventor
Jens Dahl Jensen
Ursus KRÜGER
Uwe Pyritz
Gabriele Winkler
Jan Steinbach
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1902162A1 publication Critical patent/EP1902162A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06—Suspending or supporting devices for articles to be coated
    • C25D17/08—Supporting racks, i.e. not for suspending
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/02—Tanks; Installations therefor
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10—Electrodes, e.g. composition, counter electrode
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating

Definitions

  • the present invention relates to a method for machining ⁇ th least two workpieces by means of electrochemical treatment as well as an apparatus for performing the method.
  • EP 1 094 134 A1 describes a method and a device for the electrochemical removal of a metal coating from a turbine blade.
  • the turbine blade is placed as an anodically poled working electrode in a container with an electrolytic bath.
  • the electrolytic bath also has a number of cathodes forming counter-electrodes to the turbine blade.
  • a voltage is built up between the turbine blade and the cathodes.
  • the turbine blade and the counter electrodes are assigned a voltage source, which supplies them with the necessary voltage.
  • a method for producing galvanic coatings is described in EP 0 748 883 A1.
  • the inserted workpiece to be coated in a galvanic bath ⁇ is introduced.
  • the coating material is dissolved in the form of positively-charged ge ⁇ ions in the electroplating bath.
  • the dissolved metal ions are transported to the workpiece surface, where they deposit as a coating.
  • the workpieces are placed as working electrodes in an electrolytic treatment solution.
  • each workpiece is assigned a counter-electrode arrangement , which can consist only of a single electrode or of a plurality of counter-electrodes.
  • a workpiece and its associated counter electrode arrangement together form an electrolytic processing element.
  • the electrolytic processing elements are connected in series according to the invention.
  • the series connection is to be understood in this case as meaning that at least a predominant part of the electrochemical flow of current flowing successively through the electrolytic treatment elements.
  • a current flow is selectively counteracted by the electrolytic treatment solution between the electrolytic processing elements. This can be done, for example, by shielding the individual electrolytic processing elements from the electric fields of the other electrolytic processing elements. The current can then flow, for example via cables, from one electrical processing element to another.
  • the forming of the series circuit may for example take place in that the workpiece is of an electrolytic processing element with the counter electrode assembly of another electrolytic processing element via an electrically conductive path having which a much lower electrical resistance paths as possible current ⁇ through the electrolytic treatment solution between the electrolytic processing elements.
  • workpieces and counter electrode arrangements which are connected to one another via such a low-resistance electrically conductive path, are at the same electrical potential.
  • the counter electrode arrangement of an electrolytic processing element lies on the same
  • the inventive method allows the simultaneous
  • a counter electrode arrangement is arranged or to be introduced per workpiece.
  • the counter electrode assembly may comprise a single or multiple counter electrodes.
  • a voltage source to be electrically conductively connected to a workpiece and to a counter-electrode arrangement is present.
  • the inventive device allows a series scarf ⁇ tion of the electrolytic processing elements and thus performing the method according to the invention. It therefore offers the advantages already described with reference to the method.
  • means may solvent for suppressing a current flow through the electrolytic treatment ⁇ be present between two electrolytic processing elements.
  • These devices can be, for example, Faraday walls, for example in the form of grounded wire mesh.
  • the means of a solution to the electrolytic treatment chemically inert material are produced. In this way it can be ensured that a flow of current through the electrolytic treatment solution between adjacent electrolytic processing elements can be effectively suppressed over a longer period of time.
  • FIG. 1 shows a first embodiment of the device according OF INVENTION ⁇ dung.
  • Fig. 2 shows a second embodiment for the apparatus according OF INVENTION ⁇ dung.
  • the devices described below with reference to FIGS. 1 and 2 for the electrochemical machining of at least two workpieces can be used in all galvanic processes that are controlled via a pulsed or unpulsed current.
  • Such processes are in ⁇ example, the electrochemical stripping of Werkstü ⁇ bridges, the electrochemical coating of workpieces, the electrochemical cleaning of workpieces, the electrochemical polishing of workpieces, etc.
  • a turbine blade is positively as a so anodically polarized Ar ⁇ beitselektrode in an electrolytic treatment solution, for example a saline solution, is introduced.
  • the electro-lytic treatment solution also contains a counterelectrode arrangement which is poled negatively, ie cathodically. Due to the current flow, the metal ions released from the MCrAlY coating are transported away from the turbine blade.
  • the device shown in Fig. 1 for the electrochemical treatment of workpieces comprises a container 1 in which an electrolytic treatment solution 3 can be filled.
  • an electrolytic treatment solution 3 By means of wire mesh 5, the container in different shots 6 divided.
  • the electrolytic treatment solution 3 may either have previously been filled into the container 1 or may be filled into the container after the introduction of the workpieces 7.
  • the workpieces 7 and the associated counter electrode arrangements 9 are introduced into the container 1 in such a way that exactly one workpiece 7 and one associated counter electrode arrangement 9 are located in each receptacle.
  • a workpiece and an associated counter-electrode arrangement 9 thereby form an arrangement referred to below as the electrochemical processing element.
  • One of the workpieces 7d is connected to the positive pole of a clamping ⁇ voltage source 11 electrically connected.
  • the this workpiece 7d associated counter electrode assembly 9d is liehst a possible low resistance electrical connection 13c with the work piece ⁇ 7c connected to the next electrochemical processing element.
  • Its counter-electrode arrangement 9c is in turn connected to the workpiece 7b of the third electrochemical machining element via a low-electrical connection 13d as possible.
  • Its counter-electrode arrangement 9b is in turn connected to the workpiece 7a of the last electrochemical processing element via a preferably low-resistance electrical connection 13a.
  • the counterelectrode assembly 9a of this electrochemical machining element is finally connected to the negative pole of the voltage source 11.
  • the electrically conductive connections 13 between the workpieces 7 and the counterelectrode arrangements 9 of different electrochemical treatment elements lead to a series connection of the individual electrochemical treatment elements.
  • each electrochemical surgeonsele ⁇ ment forms one element of the series circuit, in which the workpiece 7 is anodically polarized and the associated counter-electrode arrangement is polarized cathodically.
  • the electrical connects fertil 13 is such low impedance chosen so that a workpiece 7 is at the same potential as the connected to it via the elekt ⁇ generic link 13 counter electrode assembly 9.
  • the wire grid 5 make it sure that for current flow between the two poles Voltage source 11 only borrowed a single current path is available, namely that via the electrical connections 13 and - in the individual electrolytic processing elements - by the electrolytic treatment solution 3 between the workpiece 7 and the associated counter electrode assembly.
  • the voltage source 11 provides a voltage of 8 volts and, as shown in FIG. 1, four electrolytic treatment elements are connected in series, one falls over each electrolytic treatment element. ne voltage of two volts. In other words, between the workpiece 7 and the associated counter electrode 9 of an electrochemical treatment element is always a Span ⁇ tion of two volts. The potentials on which the individual workpieces 7 and counterelectrodes 9 lie are indicated in FIG.
  • the electrolytic treatment solution are exchanged 3 via appropriate inlets and outlets continuously, reindeer, for example, introduced into the electrolytic treatment solution during stripping of the turbine blades ionboundtransportie ⁇ .
  • reindeer for example, introduced into the electrolytic treatment solution during stripping of the turbine blades ionboundtransportie ⁇ .
  • the supply and Ab ⁇ flows are preferably arranged so that all images have substantially the same ion density.
  • a single inflow and a single outflow are basically sufficient, since all the receptacles 6 are fluidically connected with one another on account of the meshes of the grids 5.
  • the container of the surrounded with reference to FIG. 1 beschrie ⁇ device four images on, but it can also have more than four or less than four shots. Accordingly, the series connection can be made up of more or fewer than four electrolytic treatment elements. Limits to the number of electrolytic treatment elements from which the series circuit can be constructed, resulting from the desired voltage drop between the
  • Workpieces and associated counter electrode assemblies in conjunction with the voltage that can be provided by the power source.
  • the size of the container 1 also has to be adjusted in relation to the size of the container. workpieces is a restriction on the possible number of shots.
  • the electro ⁇ lytic editing process as with an electrolytic individual cell can be done about the current density.
  • FIG. 2 differs from the device shown in Figure 1 only in that the grounded wire mesh 5 are replaced by walls 50 of insulator material. Like the material of the wire grid in the first exemplary embodiment, the material of the insulator walls 50 is also selected such that it is chemically inert with regard to the electrolytic treatment solution 3.
  • the other elements of the embodiment shown in Figure 2 correspond to those of Figure 1. They are therefore denoted by the same reference numerals as in Figure 1 and will not be explained again at this point.
  • the apparatus shown in Figure 2 is configured to coat a workpiece, such as a turbine blade, with a metallic coating.
  • a workpiece such as a turbine blade
  • the voltage source 11 set opposite the Darge in Figure 1 ⁇ voltage source is reversed.
  • the work piece 7 forms a cathodic disch polarized electrode in the illustrated in Figure 2 polarity, while the counter electrode assembly 9 forms an anodically polarized electrode.
  • a current flow through the electrolytic treatment solution 3 between the individual electrolytic treatment elements is prevented by the insulator walls 50.
  • metal ions are supplied to the electrolytic treatment solution 3, which are transported to the surfaces of the workpieces 7 due to the voltage applied between the workpieces 7 and the associated counterelectrode arrangements 9 and deposit there to form a coating.
  • each receptacle 6 in the container Since the insulator walls 50 constitute flow barrier, is associated with its own inlet and its own outlet for elektrolyti ⁇ specific treatment solution in the second embodiment, each receptacle 6 in the container. 1

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

L'invention concerne un procédé de traitement d'au moins deux pièces (7) par traitement électrochimique. Selon ledit procédé, les pièces (7) sont disposées en tant qu'électrodes de travail dans une solution de traitement électrolytique (3) dans laquelle un système de contre-électrode (9) est affecté à chaque pièce (7). Une pièce (7) et le système de contre-électrode correspondant (9) forment un élément de traitement électrolytique. Les éléments de traitement électrolytique sont montés en série.
EP06764055A 2005-07-08 2006-07-04 Procede et dispositif de traitement d'au moins deux pieces par traitement electrochimique Withdrawn EP1902162A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005032738A DE102005032738B3 (de) 2005-07-08 2005-07-08 Verfahren und Vorrichtung zum Bearbeiten wenigstens zweier Werkstücke mittels elektrochemischer Behandlung
PCT/EP2006/063859 WO2007006690A1 (fr) 2005-07-08 2006-07-04 Procede et dispositif de traitement d'au moins deux pieces par traitement electrochimique

Publications (1)

Publication Number Publication Date
EP1902162A1 true EP1902162A1 (fr) 2008-03-26

Family

ID=36954626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06764055A Withdrawn EP1902162A1 (fr) 2005-07-08 2006-07-04 Procede et dispositif de traitement d'au moins deux pieces par traitement electrochimique

Country Status (5)

Country Link
US (1) US20090188803A1 (fr)
EP (1) EP1902162A1 (fr)
CN (1) CN101218379A (fr)
DE (1) DE102005032738B3 (fr)
WO (1) WO2007006690A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2045370A1 (fr) * 2007-10-02 2009-04-08 Siemens Aktiengesellschaft Procédé de suppression électrochimique d'un revêtement métallique
DE102008008894A1 (de) * 2008-02-13 2009-08-20 Man Turbo Ag Verfahren zur Herstellung eines Bauteiles für eine thermische Maschine
US8062496B2 (en) * 2008-04-18 2011-11-22 Integran Technologies Inc. Electroplating method and apparatus
CN104302815A (zh) * 2014-08-11 2015-01-21 深圳崇达多层线路板有限公司 一种电镀槽及电镀装置
CN108890052B (zh) * 2018-06-29 2020-04-07 南京航空航天大学 注气辅助绝缘式电解切割加工方法
CN113106532B (zh) * 2021-04-07 2023-04-11 江苏源清动力技术有限公司 一种航空发动机和燃气轮机热部件热障涂层去除工艺
EP4379096A1 (fr) * 2022-11-30 2024-06-05 Semsysco GmbH Système de distribution pour le traitement de surface chimique et/ou électrolytique d'au moins deux substrats simultanément

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE905329C (de) * 1950-05-24 1954-03-01 Franz Klinke Verfahren zur Herstellung von Aluminium-Offsetdruckplatten
US3909368A (en) * 1974-07-12 1975-09-30 Louis W Raymond Electroplating method and apparatus
DE3736076A1 (de) * 1987-10-24 1989-05-03 Schott Glaswerke Verfahren zur beschickung eines elektrochromen systems mit wasserstoff
DE19521323A1 (de) * 1995-06-12 1996-12-19 Abb Management Ag Teil mit einer galvanisch aufgebrachten Beschichtung und Verfahren zur Herstellung von galvanischen Schichten
DE19736351C1 (de) * 1997-08-21 1998-10-01 Atotech Deutschland Gmbh Verfahren und Vorrichtung zum präzisen Galvanisieren von Werkstücken
US6165345A (en) * 1999-01-14 2000-12-26 Chromalloy Gas Turbine Corporation Electrochemical stripping of turbine blades
US6352636B1 (en) * 1999-10-18 2002-03-05 General Electric Company Electrochemical system and process for stripping metallic coatings
US7470351B2 (en) * 2002-09-12 2008-12-30 Teck Cominco Metals Ltd. Discrete particle electrolyzer cathode and method of making same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007006690A1 *

Also Published As

Publication number Publication date
WO2007006690A1 (fr) 2007-01-18
CN101218379A (zh) 2008-07-09
DE102005032738B3 (de) 2006-11-23
US20090188803A1 (en) 2009-07-30

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