CN101218379A - Method and device for processing at least two workpieces by means of electrochemical treatment - Google Patents
Method and device for processing at least two workpieces by means of electrochemical treatment Download PDFInfo
- Publication number
- CN101218379A CN101218379A CNA2006800249361A CN200680024936A CN101218379A CN 101218379 A CN101218379 A CN 101218379A CN A2006800249361 A CNA2006800249361 A CN A2006800249361A CN 200680024936 A CN200680024936 A CN 200680024936A CN 101218379 A CN101218379 A CN 101218379A
- Authority
- CN
- China
- Prior art keywords
- workpiece
- electrochemical machining
- treatment liquid
- electrolysis treatment
- counter electrode
- 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.)
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Classifications
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- 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
Abstract
The invention relates to a method for processing at least two workpieces (7) by means of electrochemical treatment. During the method, the workpieces (7) are provided as working electrodes in an electrolytic treatment solution (3) inside of which a counter-electrode arrangement (9) is assigned to each workpiece (7). One workpiece (7) and the assigned counter-electrode arrangement (9) form an electrolytic processing element. The electrolytic processing elements are connected in series.
Description
The present invention relates to a kind of method and a kind of equipment of implementing this method by at least two workpiece of electrochemical treatment processing.
Nowadays the method for electrochemical treatment workpiece for example is used for coating or delamination, workpiece polishing or the workpiece cleaning of workpiece.Concrete application examples is turbine blade coating or removal coating in this way.
EP1094134A1 has introduced a kind of method and a kind of equipment is used to turbine blade electrochemistry to remove metal plating.Turbine blade is put into a container that electrolyzer is arranged as the working electrode of anodic polarization.Some negative electrodes are in this electrolyzer in addition, and they constitute the counter electrode of turbine blade.In order to remove metal plating, between turbine blade and negative electrode, apply voltage.For turbine blade and counter electrode set power supply, this power supply is to the necessary voltage of their supplies.
In EP0748883A1, introduced a kind of method that is used to make electrolytic coating.According to said method, the workpiece of coating to insert in the plating tank.Coating material is dissolved in the plating tank with the form of positive charge ion.By apply voltage between the counter electrode of the workpiece of cathodic polarization and anodic polarization, the dissolved metal ion is carried to workpiece surface, and they are deposited on the there as coating.
Introduce a kind of turbine blade electrochemistry among this external US6165345 and removed the method for coating.
Compare with the prior art that has illustrated, the purpose of this invention is to provide a kind of method and a kind of equipment, they can realize the extensive electro-chemical machining of workpiece effectively.
In by the method by at least two workpiece of electrochemical treatment processing of the present invention, workpiece is put into electrolysis treatment liquid as working electrode.For each workpiece sets a counter electrode device, the latter can only form by single electrode or by a plurality of counter electrodes in electrolysis treatment liquid.Workpiece and the counter electrode device that sets for it are formed an electrochemical machining element respectively.By these electrochemical machining element series connection of the present invention.
Series connection here is interpreted as, and the overwhelming majority at least of mobile electric current successively flows through these electrolysis treatment elements when electrochemical treatment.In order to guarantee the circuit series connection, advantageously eliminate electric current targetedly by electrolysis treatment liquid between the electrochemical machining element.This for example can reach like this: make the electromagnetic field of electrochemical machining element shielding from other electrochemical machining elements.So can for example flow to another from an electromachining element by the cable rated current.
Substitute shield electromagnetic, also can stipulate the mutual electrical isolation of electrolysis treatment liquid of each electrochemical machining element.
Can for example take following measure to realize the formation of series circuit, promptly, make the workpiece of an electrochemical machining element be connected by a conductive path with the counter electrode device of another electrochemical machining element, this conductive path has one than the little a lot of resistance of the possible current path that passes through electrolysis treatment liquid between the electrochemical machining element.Preferably, be in same current potential by interconnected workpiece of this type of low-resistance conductive path and counter electrode device.In other words, the working electrode that is attached thereto by low-resistance path of the counter electrode device of an electrochemical machining element and next electrochemical machining element is in same current potential.This working electrode is electrically connected with the counter electrode device that sets in this electrochemical machining element in this electrochemical machining element by electrolysis treatment liquid then, and this counter electrode device is connected by the working electrode of low resistance path with another electrochemical machining element again.There is a potential difference respectively between working electrode in each electrochemical machining element and the counter electrode that sets here.
Can under the situation of only using single power supply, process a plurality of workpiece simultaneously by method of the present invention.Based on series circuit, can reach basic identical by the electric current of all workpiece.Therefore the control of process can be undertaken by current density as so far.Because do not need to establish for each workpiece the power supply of oneself in by method of the present invention, as the generator of oneself, thereby the investment can reduce large-scale industrial application the time causes expensive generator quantity because can reduce.
By the equipment of the present invention by at least two workpiece of electrochemical treatment processing, comprise a container, but can be used as working electrode, a kind of electrolysis treatment liquid of its filling and workpiece insert wherein.In container, be provided with or insert a counter electrode device for each workpiece.The counter electrode device can comprise single or multiple counter electrodes.At last, exist one to conduct electricity the power supply that is connected with workpiece and with the counter electrode device.Electrochemical machining element of a workpiece and the common formation of the counter electrode device that sets, wherein, at least one workpiece of an electrochemical machining element is connected by conductive path with the counter electrode device of another electrochemical machining element, and this conductive path has than the much smaller resistance of electrolysis treatment liquid between two electrochemical machining elements.
By equipment of the present invention can realize the electrochemical machining element series circuit and thereby can implement by method of the present invention.Therefore have those advantages that illustrated at method by equipment of the present invention.
In order to guarantee successively to flow through each electrochemical machining element basically adding the man-hour electric current, can exist some devices to be used to cut off electric current by electrolysis treatment liquid between two electrochemical machining elements.These devices can for example be for example to be the faraday wall of grounded metal silk grid in form.But also can be different with it, these devices are realized by the wall of electrically insulating material system.In both cases advantageously, these devices are chemically inert material manufacturing with a kind of to electrolysis treatment liquid.Can guarantee in this way, even through still effectively suppressing electric current after the long time by electrolysis treatment liquid between the adjacent electrochemical machining element.
By providing other features of the present invention, characteristic and advantage to the explanation of embodiment referring to accompanying drawing.
Fig. 1 represents first kind of embodiment by present device.
Fig. 2 represents second kind of embodiment by present device.
Referring to the equipment that is used at least two workpiece of electro-chemical machining of Fig. 1 and 2 explanation, can be used in all electrolytic processes by pulsation or the control of non-pulsatory current.These processes for example are the delamination of workpiece electrochemistry, workpiece electrochemical plating, the cleaning of workpiece electrochemistry, workpiece electrochemical etching etc.
Remove turbine blade MCrAlY coating explanatory view 1 apparatus shown at electrochemistry below.By this electrochemistry delamination method, turbine blade is as positive pole, that is the working electrode of anodic polarization, inserts electrolysis treatment liquid for example in the salt solution.The counter electrode device of negative pole, that is cathodic polarization in addition also is in the electrolysis treatment liquid.Based on electric current, will remove from turbine blade from the metal ion of MCrAlY coating lixiviate.
The equipment that the electrochemical treatment workpiece of representing in Fig. 1 is used, but comprise the container 1 of a kind of electrolysis treatment liquid 3 of wherein filling.By wire grid 5 container is divided into different holding grooves 6.In each holding groove 6, insert the turbine blade of wanting delamination as the workpiece 7 that constitutes working electrode, and the counter electrode device 9 that sets for workpiece 7.Electrolysis treatment liquid 3 or can inject in advance in the container 1, or can perfusion again after workpiece 7 is inserted container.
Workpiece 7 is inserted in the container 1 by this way with the counter electrode device 9 that sets, that is, making just in time respectively has a workpiece and a counter electrode device 9 that sets in each holding groove.Here a workpiece and a counter electrode device that sets 9 constitute the configuration of electro-chemical machining element hereinafter referred to as.
One of workpiece 7d is electrically connected with the positive pole of power supply 11.The counter electrode device 9d that sets for this workpiece 7d is connected with the workpiece 7c of next electro-chemical machining element by the as far as possible little electric connection line 13c of resistance.The latter's counter electrode device 9c is connected with the workpiece 7b of the 3rd electro-chemical machining element by the as far as possible little electrical connection 13b of resistance again.The latter's counter electrode device 9b is connected with the workpiece 7a of last electro-chemical machining element by the as far as possible little electrical connection 13a of resistance again.The counter electrode device 9a of this last electro-chemical machining element is connected with the negative electricity of power supply 11.
Wire grid 5 ground connection that each holding groove 6 and the electro-chemical machining element that is mounted in it are separated each other, and make the electromagnetic field of these electrochemical treatment elements shieldings from other electrolysis treatment elements.Can effectively cut off electric current in this way by electrolysis treatment liquid between each electrolysis treatment element.For avoiding the material of galvanic corrosion wire grid 5, will adopt a kind ofly to be chemically inert material for electrolysis treatment liquid 3.
The workpiece 7 of variant electrochemical treatment element and the connection of the conduction between the counter electrode device 9 13 cause a kind of series circuit of each electrochemical treatment element.Here each electrochemical treatment element constitutes the part in the series circuit respectively, and wherein the workpiece 7 anode ground polarization and the counter electrode device negative electrode ground of attaching troops to a unit polarize.Low resistance is selected in this electrical connection, and workpiece 7 is in it by being electrically connected the identical current potential of 13 counter electrode devices that link to each other 9.Wire grid 5 guarantees that the electric current between power supply 11 the two poles of the earth only supplies with a unique current path in this case, that is that is by the electric connection line 13 and the current path of electrolysis treatment liquid at each electrochemical machining element internal and between by workpiece 7 and the counter electrode device 9 that sets.
If power supply 11 is for example supplied with 8 volts voltage, and four the electrolysis treatment elements of connecting as shown in Figure 1, then reduce 2 volts through each electrolysis treatment element voltage.In other words, between the workpiece 7 of an electrochemical machining element and the counter electrode device 9 that sets, apply 2 volts of voltages all the time.Each workpiece 7 and counter electrode device 9 residing current potentials in Fig. 1, have been represented.
In electrochemical treatment process, for example in order to export the ion that adds when the turbine blade delamination in the electrolysis treatment liquid, electrolysis treatment liquid 3 can by appropriate flow into and flow out continuously change.Can supply with new ion continuously by flowing into when coating, they can be used as coating and are deposited on workpiece 7 surfaces.Influx and relief outlet preferably are arranged as, and make all holding grooves that same ion density be arranged basically.In equipment shown in Figure 1, there are single influx and single relief outlet just much of that in principle, because be intercommunication on flow technique based on all holding grooves of mesh of grid 5.
Although the container 1 at the equipment of Fig. 1 explanation has four holding grooves, yet container also can have more than four or be less than four holding grooves.Correspondingly this series circuit can be by constituting greater or less than four electrolysis treatment elements.According to the volts lost of expecting between workpiece and the counter electrode device that sets and the voltage that can be provided by power supply is provided, restriction can be made of the electrolysis treatment number of elements of series circuit them.In addition, the ratio of the size of container 1 and the size of the workpiece that will process also means it is a kind of restriction for the possible quantity of holding groove.
Because make by the electric current of all electrochemical machining elements based on series circuit identical, so electrochemical machining process control is undertaken by current density as when the single electrolyzer.
Referring to the second kind embodiment of Fig. 2 explanation by present device.The equipment of representing among Fig. 2 and the difference of equipment shown in Figure 1 only are that wire grid 5 usefulness of ground connection wall 50 made of insulating material replaces.The same with the material of wire grid in first kind of embodiment, the material of insulating wall 50 is chosen as also that to make it for electrolysis treatment liquid 3 be chemically inert.Other elements of embodiment shown in Figure 2 are consistent with among Fig. 1 those.Therefore they use with Fig. 1 in identical Reference numeral represent and here need not to set forth once more.
Equipment design shown in Figure 2 is used to for example turbine blade plated metal coating of workpiece.This means that power supply 11 compares polarity conversion with power supply shown in Figure 1.In other words, workpiece 7 constitutes the electrode of cathodic polarization under polar situation shown in Figure 2 in each electrolysis treatment element, and counter electrode device 9 constitutes the electrode of anodic polarization.Electric current by electrolysis treatment liquid 3 between each electrode processing element is insulated wall 50 cut-outs.
For giving workpiece 7 coating, supply with metal ions to electrolysis treatment liquid 3, they are based on also being deposited as a coating at the voltage that applies between workpiece and the counter electrode device that sets there to workpiece 7 surface transport.
Because it is the electric current barrier that insulating wall 50 means, so in second kind of embodiment, set one of electrolysis treatment liquid oneself influx and oneself relief outlet for each holding groove 6 in the container 1.
Claims (12)
1. method by at least two workpiece of electrochemical treatment processing (7), wherein, these at least two workpiece (7) are put into a kind of electrolysis treatment liquid (3) as working electrode, in this electrolysis treatment liquid (3), set a counter electrode device (9) for each workpiece (7), wherein, each workpiece (7) and the counter electrode device (9) that set constitute an electrochemical machining element respectively and these electrochemical machining elements are connected mutually.
2. in accordance with the method for claim 1, wherein, eliminate electric current targetedly by electrolysis treatment liquid (3) between each electrochemical machining element.
3. in accordance with the method for claim 2, wherein, described each electrochemical machining element shielding is from the electromagnetic field of other electrochemical machining elements.
4. in accordance with the method for claim 2, wherein, the mutual electrical isolation of electrolysis treatment liquid of described each electrochemical machining element.
5. according to the described method of one of all claims in prostatitis, it is characterized by, for forming described series circuit, the workpiece of an electrochemical machining element (7) is connected by a low resistance conductive path (13) with the counter electrode device (9) of another electrochemical machining element, and the latter has than the possible little a lot of resistance of the current path that passes through electrolysis treatment liquid (3) between each electrochemical machining element.
6. in accordance with the method for claim 5, it is characterized by, be in same current potential by interconnected described workpiece of described low resistance conductive path (1 3) (7) and described counter electrode device (9).
7. the equipment by electrochemical treatment at least two workpiece of processing (7) comprises
-one container (1) is inserted wherein but a kind of electrolysis treatment liquid of its filling (3) and described workpiece (7) can be used as working electrode,
-each workpiece (7) has one to be located in the container (1) or to insert counter electrode device (9) in the container (1), and
-one power supply (11) that should be connected with workpiece (7) and counter electrode device (9) conduction, wherein, electrochemical machining element of each workpiece (7) and the common respectively formation of the counter electrode device (9) that is set, and, at least one workpiece (7) of an electrochemical machining element is connected by a conductive path (13) with the counter electrode device (9) of another electrochemical machining element, and the latter has than the littler resistance of electrolysis treatment liquid (3) between these two electrochemical machining elements.
8. according to the described equipment of claim 7, in this equipment, exist some devices (5,50) to be used for cutting off the electric current that passes through electrolysis treatment liquid (3) between two electrochemical machining elements.
9. according to the described equipment of claim 8, it is characterized by, the described device that is used for cutting off by the electric current of electrolysis treatment liquid (3) between two electrochemical machining elements is faraday wall (5).
10. according to the described equipment of claim 9, wherein, the wire grid (5) that is provided with ground connection is as described faraday wall.
11. according to the described equipment of claim 8, it is characterized by, the described device that is used for cutting off by the electric current of electrolysis treatment liquid (3) between two electrochemical machining elements is an electricity consumption wall made of insulating material (50).
12. according to the described equipment of one of claim 9 to 11, wherein, the wall (50) of described faraday wall (5) or electrically insulating material system is chemically inert material manufacturing with a kind of to electrolysis treatment liquid (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005032738.9 | 2005-07-08 | ||
| DE102005032738A DE102005032738B3 (en) | 2005-07-08 | 2005-07-08 | Electrochemical treatment of multiple workpieces comprises connecting units comprising a workpiece and a counterelectrode in series |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101218379A true CN101218379A (en) | 2008-07-09 |
Family
ID=36954626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800249361A Pending CN101218379A (en) | 2005-07-08 | 2006-07-04 | Method and device for processing at least two workpieces by means of electrochemical treatment |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20090188803A1 (en) |
| EP (1) | EP1902162A1 (en) |
| CN (1) | CN101218379A (en) |
| DE (1) | DE102005032738B3 (en) |
| WO (1) | WO2007006690A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302815A (en) * | 2014-08-11 | 2015-01-21 | 深圳崇达多层线路板有限公司 | Plating slot and plating device |
| CN113106532A (en) * | 2021-04-07 | 2021-07-13 | 江苏源清动力技术有限公司 | Process for removing thermal barrier coating of thermal component of aero-engine and gas turbine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2045370A1 (en) * | 2007-10-02 | 2009-04-08 | Siemens Aktiengesellschaft | Method for electrochemical removal of a metal coating |
| DE102008008894A1 (en) * | 2008-02-13 | 2009-08-20 | Man Turbo Ag | Method for producing a component for a thermal machine |
| US8062496B2 (en) * | 2008-04-18 | 2011-11-22 | Integran Technologies Inc. | Electroplating method and apparatus |
| CN108890052B (en) * | 2018-06-29 | 2020-04-07 | 南京航空航天大学 | Gas injection auxiliary insulation type electrolytic cutting machining method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE905329C (en) * | 1950-05-24 | 1954-03-01 | Franz Klinke | Process for the production of aluminum offset printing plates |
| US3909368A (en) * | 1974-07-12 | 1975-09-30 | Louis W Raymond | Electroplating method and apparatus |
| DE3736076A1 (en) * | 1987-10-24 | 1989-05-03 | Schott Glaswerke | METHOD FOR FEEDING AN ELECTROCHROMIC SYSTEM WITH HYDROGEN |
| DE19521323A1 (en) * | 1995-06-12 | 1996-12-19 | Abb Management Ag | Part with a galvanically applied coating and method for producing galvanic layers |
| DE19736351C1 (en) * | 1997-08-21 | 1998-10-01 | Atotech Deutschland Gmbh | Precision galvanising of workpieces |
| 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 |
-
2005
- 2005-07-08 DE DE102005032738A patent/DE102005032738B3/en not_active Expired - Fee Related
-
2006
- 2006-07-04 EP EP06764055A patent/EP1902162A1/en not_active Withdrawn
- 2006-07-04 US US11/988,496 patent/US20090188803A1/en not_active Abandoned
- 2006-07-04 CN CNA2006800249361A patent/CN101218379A/en active Pending
- 2006-07-04 WO PCT/EP2006/063859 patent/WO2007006690A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302815A (en) * | 2014-08-11 | 2015-01-21 | 深圳崇达多层线路板有限公司 | Plating slot and plating device |
| CN113106532A (en) * | 2021-04-07 | 2021-07-13 | 江苏源清动力技术有限公司 | Process for removing thermal barrier coating of thermal component of aero-engine and gas turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1902162A1 (en) | 2008-03-26 |
| US20090188803A1 (en) | 2009-07-30 |
| DE102005032738B3 (en) | 2006-11-23 |
| WO2007006690A1 (en) | 2007-01-18 |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080709 |