CN109158720A - The means of defence in non-processing face in electrical-chemistry method - Google Patents
The means of defence in non-processing face in electrical-chemistry method Download PDFInfo
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- CN109158720A CN109158720A CN201811127963.2A CN201811127963A CN109158720A CN 109158720 A CN109158720 A CN 109158720A CN 201811127963 A CN201811127963 A CN 201811127963A CN 109158720 A CN109158720 A CN 109158720A
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- electrical
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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
-
- 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
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The present invention relates to electrolytic processing process technical field is related to, a kind of means of defence in non-processing face in electrical-chemistry method is proposed.Workpiece to be machined is electrically connected with the anode of processing power source; anode as electrical-chemistry method; machining tool is electrically connected with the cathode of processing power source; cathode as electrical-chemistry method; swiftly flowing electrolyte is full of in the gap of the workpiece to be machined and the machining tool, this method comprises: conductive protection plate is arranged between the non-processing face and the machining tool of the workpiece to be machined；Protection power source is set between the conductive protection plate and the workpiece to be machined; the conductive protection plate is electrically connected with the anode of the protection power source; as the anode in protection circuit, the workpiece to be machined is electrically connected with the cathode of the protection power source, as the cathode in protection circuit.
Description
Technical field
The present invention relates to electrolytic processing process technical field, more particularly in a kind of electrical-chemistry method non-processing face it is anti-
Maintaining method.
Background technique
Integral blade disk blade profile electrical-chemistry method is the main integral blade disk blade profile of another kind in addition to high-speed numeric control milling
Manufacturing process belongs to special process method.It is using Anodic solution principle removal metal and by means of processing and forming
Electrode (cathode), by workpiece (anode) by a kind of process of the shape and size machine-shaping of cathode.Process principle are as follows: add
Working hour processing and forming electrode connects processing power source cathode, and workpiece connects processing power source anode, two interpolars apply certain voltage and keep compared with
Small gap processes and is full of swiftly flowing electrolyte in gap, the feed motion with processing and forming electrode to workpiece, gradually
Workpiece dissolution is shaped.
Integral blade disk blade profile electrical-chemistry method realizes leaf basin, blade back, root R and runner by two Combined machining electrodes
Machine-shaping while face.Different from individual blade electrical-chemistry method, integral blade disk blade profile electrical-chemistry method is needed in annular
Continuous maching goes out tens blades of uniform dense distribution on disk body circumference, and the spacing between blade is smaller.Due in whole leaf
When each blade profile electrical-chemistry method of disk, entire disk body is in the electric field and flow field of electrical-chemistry method foundation, therefore current
The process of blade must influence other positions, especially neighbouring manufactured blade and root flow passage area.
These regions are typically in lower or extremely low current density regions, general more or less all to there is smaller or minimum stray electrical
Stream, the presence of stray electrical current would potentially result in non-processing face (the blade and blade basin of machined completion, blade back, root R runner and wheel hub
Side etc.) generate spuious spot corrosion.Especially such as titanium alloy material more sensitive to low current density, spuious spot corrosion are more bright
It is aobvious.Therefore it prevents or avoids in non-processing face, it is integral blade disk electrochemistry that dispersion corrosion, which occurs, in especially manufactured surface
Technology has to the critical issue for solving to overcome.
Previous main use is coated or is applied the physical barriers method of insulating layer coating — that is, before currently processing blade, adopt
The manufactured blade of periphery and root R and runner are coated or are coated insulating materials and protect by mode by hand, but
It is that this physical barriers method needs after the completion of one or a set of blade processing, stops after manually protect operation again
Continue the processing of other blade profiles, cannot achieve the continuous automatic processing of entire leaf dish blade profile, significantly impacts production and processing effect
Rate.
Therefore, a kind of means of defence in non-processing face in electrical-chemistry method is inventor provided.
Summary of the invention
The embodiment of the invention provides a kind of means of defences in non-processing face in electrical-chemistry method, are able to solve integral blade disk
In electrochemical machining process, due to there are problems that stray electrical current causes non-processing face to generate spuious spot corrosion.
The embodiment of the present invention proposes a kind of means of defence in non-processing face in electrical-chemistry method, by workpiece to be machined with
The anode electricity of processing power source, as the anode of electrical-chemistry method, machining tool is electrically connected with the cathode of processing power source, as electricity
The cathode of chemical process is full of swiftly flowing electrolyte in the gap of the workpiece to be machined and the machining tool, should
Method includes:
Conductive protection plate is set between the non-processing face and the machining tool of the workpiece to be machined；
Protection power source is set between the conductive protection plate and the workpiece to be machined, the conductive protection plate with it is described
The anode electrical connection of protection power source, as the anode in protection circuit, the cathode of the workpiece to be machined and the protection power source
Electrical connection, as the cathode in protection circuit.
Further, the conductive protection plate is metal plate.
Further, the voltage of the protection power source is smaller than the voltage of the processing power source.
Further, the voltage of the protection power source is 0~5V.
Further, when the machining tool carries out electrical-chemistry method to the workpiece to be machined, the protection power source
Voltage be set as 1V~1.5V.
Further, the workpiece to be machined is integral blade disk blank, and the machining tool is to match with leaf dish blade profile
Forming metal tool, for by the integral blade disk blank electrical-chemistry method at the leaf dish blade profile for meeting pre-provisioning request.
Further, two or more machining tool combinations, synchronize or successively to the integral blade disk hair
Base carries out electrical-chemistry method, leaf basin, blade back and the root R and stream of the forming surface of the machining tool and molding impeller blade
Road face matches.
Further, the material of the integral blade disk blank is titanium alloy.
To sum up, in electrical-chemistry method of the invention non-processing face means of defence, pass through and introduce protection power source and conductive protect
Conductive protection plate is electrically connected with the anode of protection power source, as anodic protection electrode, can offset or block by electricity by backplate
The stray electrical current generated between the anode and cathode of chemical process, to play the work of protection to the non-processing face of work piece
With the problem of eliminating spuious spot corrosion.Further, it is also possible to reasonable voltage is set using the relationship of voltage and metal passivation, it can
Stray electrical current is eliminated, and does not cause to generate electric current between the non-processing face of workpiece to be machined and anodic protection electrode, has been reached both
The non-processing face of workpiece to be machined is protected, and anodic protection electrode itself will not be made to be dissolved the purpose consumed quickly.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the setting schematic diagram of the guard method in non-processing face in electrical-chemistry method of the invention.
Fig. 2 is Anodic solubility curve schematic diagram in passivity electrolyte.
In figure:
1- processing power source；2- workpiece to be machined；3- machining tool；4- conductive protection plate；5- protection power source；6- electrolyte enters
Mouthful；7- processes electric field；8- protects electric field；9- electrolyte outlet.
Specific embodiment
It is previous main using painting for the spuious pitting problem in non-processing face present in integral blade disk blade profile electrical-chemistry method
Lid or apply insulating layer coating physical barriers method — that is, before currently processing blade, using manual mode by periphery
The blade and root R and runner processed is coated or is coated insulating materials and protected, and three kinds of modes are generallyd use: first is that pasting
Insulating tape；Second is that set isolating shrinkable tube, makes it be close to machined blade surface after heating baking；Third is that coating photosensitive insulating cement
Film makes it be solidificated in machined surface by heating and photosensitive irradiation.Three kinds of methods respectively have deficiency, paste insulating tape and require quilt
It protects surface clean and dry, is fallen off in process due to otherwise being leaned on because being pasted not strongly；Set isolating shrinkable tube increases
Scene heating roasting procedure, but the position that can not cannot cover heat-shrink tube to root runner etc. is protected；Coat photosensitive insulating cement
The method of film can protect each position, but carry out coating operation after needing to disassemble leaf dish from process equipment, apply
It covers complex procedures and there is individual point coatings the case where instead resulting in point spuious spot corrosion exacerbation appearance not in place.
The maximum common issue of these methods is: needing after the completion of one or a set of blade processing, stops and carry out people
It is further continued for carrying out other blade profile processing after work protection operation, cannot achieve the continuous automatic processing of entire leaf dish blade profile, very big shadow
Production and processing efficiency is rung.The present invention will use unique anode electrode guard method, by theory analysis and engineer testing, dash forward
Broken technology implement on difficult point, solve integral blade disk continuously need to carry out spuious spot corrosion to non-processing face in processing automatically it is anti-
The problem of shield.
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment it is detailed
Thin description and attached drawing cannot be used to limit the scope of the invention for illustratively illustrating the principle of the present invention, i.e., of the invention
It is not limited to described embodiment, covers components, connection type and operation under the premise of without departing from the spirit of the present invention
Any modification, replacement and the improvement of mode.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to accompanying drawings and in conjunction with the embodiments.
The present invention provides a kind of means of defences in non-processing face in electrical-chemistry method.As shown in Figure 1, by workpiece to be machined
2 are electrically connected with the anode of processing power source 1, as the anode of electrical-chemistry method, by the negative electricity of machining tool 3 and processing power source 1
Connection, as the cathode of electrical-chemistry method, (electrolyte entrance 6 and electrolysis in the gap of workpiece to be machined 2 and machining tool 2
Between liquid outlet 9) it is full of swiftly flowing electrolyte.Means of defence of the invention includes:
Conductive protection plate 4 is set between the non-processing face and machining tool 3 of workpiece to be machined 2；
Protection power source 5, conductive protection plate 4 and protection power source 5 are set between conductive protection plate 4 and workpiece to be machined 2
Anode electrical connection, as the anode in protection circuit, workpiece to be machined 2 is electrically connected with the cathode of protection power source 5, as protection electricity
Cathode in road.
Further, the voltage of protection power source 5 is smaller than the voltage of processing power source 1.As a kind of alternative embodiment, protection electricity
The voltage in source 5 is preferably 0~5V.Conductive protection plate 4 is metal plate, preferably uses stainless steel plate in the present embodiment.
As another alternative embodiment, when machining tool 3 carries out electrical-chemistry method to workpiece to be machined 2, protection electricity
The voltage in source 5 is set as 1V~1.5V.
In other alternative embodiments, workpiece to be machined 2 is integral blade disk blank, and machining tool 3 is and leaf dish blade profile phase
Matched forming metal tool, for by integral blade disk blank electrical-chemistry method at the leaf dish blade profile for meeting pre-provisioning request.
It is possible to further be combined using two or more machining tool 3, synchronize or successively to integral blade disk
Blank carries out electrical-chemistry method, leaf basin, blade back and the root R and stream of the forming surface of machining tool 3 and molding impeller blade
Road face matches.
As shown in Figure 1, in process, conductive protection plate 4 and workpiece to be machined 2 as anodic protection electrode it is non-
New electro-chemical systems are established between machined surface, in this new electro-chemical systems, the current potential of anodic protection electrode is positive,
The non-processing face current potential of workpiece is negative, and produces and newly protects electric field 8.Machining tool 3 (cathode) leads to workpiece to be machined 2 originally
The power line of the processing electric field 7 (presence of exactly these processing electric fields 7 causes non-processing face to generate spuious spot corrosion) in non-processing face
It is blocked, the root for generating stray electrical current between machining tool 3 (cathode) and non-processing face is eliminated, to play to non-processing
The purpose of face protection.
It is theoretical according further to electrochemical dissolution of the metal in passivity electrolyte, referring to figs. 1 and 2, when the two poles of the earth it
Between voltage start from scratch when being gradually increased, metal surface is in the state of activation, and two interpolars generate electric current, and anode begins with molten
Solution, and electric current increases with voltage and is gradually increased, but when voltage continues to increase to certain value (generally in 1V or so), anode table
Transformation of the activation to passivation occurs for face, and electric current drops to 0, and dissolving metal stops, and metal surface is in passive state, when voltage again
When continuing to rise to certain value (different rapidoprints, this value is different, needs to test determination, generally 3V~5V it
Between), metal surface will turn again to the state of activation of ultra-passivation from passive state, electrode current again from 0 with the raising of voltage and
Increase, anode surface is activated, and dissolution continues and is normally carried out (see Fig. 2).Therefore, it is protected using anodic passivity area, if
When fixed reasonable protection voltage, it can make not generate electric current between the non-processing face of workpiece to be machined 2 and conductive protection plate 4, reach
Not only the non-processing face of workpiece to be machined 2 is protected, but also so that the conductive protection plate 4 as anodic protection electrode (is can be
The conductive metals such as stainless steel) purpose consumed is dissolved quickly for itself.
To sum up, the present invention is changed by the anti-desultory point etching method for using insulating materials to be physically separated originally based on sun
The anti-desultory point etching method that the electrochemistry of pole guard electrode blocks, realizes pair in integral blade disk blade profile electrochemical machining process
The on-line automatic of non-processing surface prevents spuious spot corrosion, it is no longer necessary to which breaking working carries out after the completion of one or a set of blade processing
Artificial protection operation, is further continued for carrying out other blade processings later, is truly realized the full-automation of all blade profiles of integral blade disk
Electrochemical machining process greatly improves processing efficiency.In addition, the electrochemistry based on metal in passivity electrolyte is molten
Solution is theoretical, and anodic solution passivation region is utilized and is protected, in the electrical-chemistry method of all blade profiles of integral blade disk, ensure that work
For the service life of the conductive protection plate of anodic protection electrode.
It should be clear that all the embodiments in this specification are described in a progressive manner, each embodiment it
Between the same or similar part may refer to each other, the highlights of each of the examples are it is different from other embodiments it
Place.For the embodiment of method, related place can be found in the part explanation of apparatus embodiments.The invention is not limited to upper
Literary particular step described and shown in figure and structure.Also, it for brevity, omits here to known method technology
Detailed description.
The above description is only an example of the present application, is not restricted to the application.The scope of the present invention is not being departed from
In the case where to those skilled in the art, various changes and changes are possible in this application.It is all in spirit herein and
Any modification, equivalent replacement, improvement and so within principle, should be included within the scope of claims hereof.
Claims (8)
1. workpiece to be machined is electrically connected by the means of defence in non-processing face in electrical-chemistry method with the anode of processing power source, as
Machining tool is electrically connected, as the cathode of electrical-chemistry method, described by the anode of electrical-chemistry method with the cathode of processing power source
Swiftly flowing electrolyte is full of in the gap of workpiece to be machined and the machining tool, which is characterized in that the described method includes:
Conductive protection plate is set between the non-processing face and the machining tool of the workpiece to be machined；
Protection power source, the conductive protection plate and the protection are set between the conductive protection plate and the workpiece to be machined
The anode electrical connection of power supply, as the anode in protection circuit, the workpiece to be machined and the cathode of the protection power source are electrically connected
It connects, as the cathode in protection circuit.
2. the means of defence in non-processing face in electrical-chemistry method according to claim 1, which is characterized in that the conductive guarantor
Backplate is metal plate.
3. the means of defence in non-processing face in electrical-chemistry method according to claim 1, which is characterized in that the protection electricity
The voltage in source is smaller than the voltage of the processing power source.
4. the means of defence in non-processing face in electrical-chemistry method according to claim 1, which is characterized in that the protection electricity
The voltage in source is 0~5V.
5. the means of defence in non-processing face in electrical-chemistry method according to claim 4, which is characterized in that in the processing
When tool carries out electrical-chemistry method to the workpiece to be machined, the voltage of the protection power source is set as 1V~1.5V.
6. the means of defence in non-processing face in electrical-chemistry method according to claim 1, which is characterized in that described to be processed
Workpiece is integral blade disk blank, and the machining tool is the forming metal tool to match with leaf dish blade profile, and being used for will be described whole
Body leaf dish blank electrical-chemistry method is at the leaf dish blade profile for meeting pre-provisioning request.
7. the means of defence in non-processing face in electrical-chemistry method according to claim 6, which is characterized in that two or two
Above machining tool combination, synchronizes or successively carries out electrical-chemistry method, the processing work to the integral blade disk blank
The forming surface of tool and leaf basin, blade back and the root R and pipes' analysis of molding impeller blade match.
8. the means of defence in non-processing face in electrical-chemistry method according to claim 6, which is characterized in that the entirety leaf
The material of disk blank is titanium alloy.
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| CN201811127963.2A CN109158720A (en) | 2018-09-27 | 2018-09-27 | The means of defence in non-processing face in electrical-chemistry method |
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| CN201811127963.2A CN109158720A (en) | 2018-09-27 | 2018-09-27 | The means of defence in non-processing face in electrical-chemistry method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112191962A (en) * | 2020-09-29 | 2021-01-08 | 中国航发动力股份有限公司 | Electrolytic machining process method of open type blisk |
| CN114734101A (en) * | 2022-04-21 | 2022-07-12 | 南京航空航天大学 | Device and method for electrochemical machining of blisk |
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| CN112191962A (en) * | 2020-09-29 | 2021-01-08 | 中国航发动力股份有限公司 | Electrolytic machining process method of open type blisk |
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Application publication date: 20190108 |