CN108393547A - Improve the tool cathode and method of electrolysis milling processing soffit plane degree - Google Patents
Improve the tool cathode and method of electrolysis milling processing soffit plane degree Download PDFInfo
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- CN108393547A CN108393547A CN201810047135.1A CN201810047135A CN108393547A CN 108393547 A CN108393547 A CN 108393547A CN 201810047135 A CN201810047135 A CN 201810047135A CN 108393547 A CN108393547 A CN 108393547A
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- tool cathode
- abrasive grain
- processing
- tool
- cathode
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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
- B23H5/00—Combined machining
- B23H5/06—Electrochemical machining combined with mechanical working, e.g. grinding or honing
- B23H5/08—Electrolytic grinding
-
- 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
- B23H5/00—Combined machining
- B23H5/10—Electrodes specially adapted therefor or their manufacture
Abstract
The present invention relates to a kind of tool cathodes and method for improving electrolysis milling and processing soffit plane degree, belong to electrolysis milling Compound Machining field.The tool cathode side wall of the present invention has conductive abrasive grain layer and insulation abrasive grain layer, and bottom surface is insulated.When work, bottom surface insulating layer reduces the current density of processing bottom surface central region, lateral wall insulation abrasive grain layer can reduce the current density in bottom edge region, so as to improve the big problem of bottom surface current density difference when electrolysis milling processing, and then improve the soffit plane degree of electrolysis milling processing.
Description
Technical field
The present invention relates to a kind of tool cathodes and method for improving electrolysis milling and processing soffit plane degree, belong to electrolysis milling
Compound Machining field.
Background technology
It is high, heat-resist using specific strengths such as titanium alloy, high temperature alloys with the demand that Aeronautics and Astronautics field is developed
The part of material preparation is more and more applied.For example, the compressor disc and blade that are only manufactured by using titanium alloy,
The weight for mitigating aero-engine, just can make its thrust-weight ratio reach 8 or more；GH4169 alloys account for respectively CF6 engines,
34%, 56% and the 57% of CY2000 engines and PW4000 engine total weights.However, since the hardness of these materials is high, heat conduction
Can force difference, the features such as deformation coefficient is small, cutting force is big when mechanical processing, machining area temperature is high, and tool wear is serious, especially
When the part that machining feature is complicated, structure is frivolous, such as the combustion chamber Thin-Wall Outer Casing of aero-engine, part is processed into from blank
Material removal than general up to 60%~80%, even more bring lot of challenges to manufacturing technology.
Electrochemical grinding is a kind of mutually compound by the effect of electrolysis and mechanical grinding and realizes the processing method that material removes.
Traditional electrochemical grinding processing generally use conduction grinding wheel is as the electrolyte in tool cathode, with anode workpiece processing gap
It is provided by external nozzle.When energization processing, the metal of workpiece surface layer occurs Anodic and dissolves and generate one layer of hardness
Smaller oxide layer is struck off by the abrasive grain on conductive grinding wheel immediately, exposes new metal surface and is electrolysed again, repeatedly
It carries out, the processing request until reaching needs.In electrochemical grinding process, metal material is mainly gone in the form of an ion
Remove, when grinding force ratio mechanical grinding small more, therefore the abrasion of tool is very small, and the thermal damage after material processing is also small, very
Metal material suitable for difficult processing cutting.However, limited by grinding wheel structure and feed liquid way, cutting-in when electrochemical grinding
Small, efficiency is low, and processing flexibility is poor, is unfavorable for the application of the technology.
In order to improve this problem, electrolysis milling processing technology is suggested, i.e., using rodlike bistrique as tool cathode, with
The generation line of profile is collectively formed by the rotary motion of bistrique electrode and the feed motion of workpiece for the mode of similar numerical control milling, is led to
Cross the method that processing is formed in phase cutting method.It is processed compared to traditional electrochemical grinding, the mode of numerical control milling can carry significantly
The flexibility of height processing, it is convenient to type face, cavity, thin-walled and boss is isostructural transforms into processing.Moreover, rodlike bistrique due to
The feed flow of interior liquid-spraying type may be implemented in simple shape, solves electricity in machining area when big cutting-in under outer hydrojet feed liquid way
The problem of solution liquid is insufficient, product is difficult to wash away in time, the material thickness that can be removed when improving single feed significantly improves
Material remove rate further improves the efficiency of electrolysis milling processing.
Currently, the generally circular electrode of tool cathode of interior hydrojet electrolysis milling processing, when preparation first in tool cathode
The heart processes blind hole as liquid inlet, then several mouth sprays is processed in base side walls, finally again in matrix effective machining
Domain electroplated diamond abrasive grain.When carrying out electrolysis milling plane machining using the cathode of this structure, due to cathode bottom and workpiece
Between electrolysis so that workpiece surface machined surface occur re-electrolysis, cause workpiece material further ablation and
Dispersion corrosion, the plane finally processed often show concave configuration, reduce the flatness of processing bottom surface.In patent
It refers to open up the tool cathode of insulation tank in bottom surface in CN105921834A, but by its side wall and the shadow of bottom surface outer ring conduction
It rings, after electrolysis milling processing, apparent recessed, the flatness of bottom surface occurs in the workpiece surface opposite with tool bottom surface outer edge
Still poor.Therefore, the flatness for how improving processing bottom surface, the promotion and application for being electrolysed Milling techniques have important meaning
Justice.
Invention content
The object of the present invention is to provide a kind of tool cathodes for improving electrolysis milling and processing soffit plane degree, for reducing electricity
The re-electrolysis for solving machined bottom surface in milling processing, improves soffit plane degree.
A kind of tool cathode improving electrolysis milling processing soffit plane degree, it is characterised in that：The tool cathode bottom surface
Insulation processing is carried out, bottom surface insulating layer is formed；The tool cathode side wall lower ends are divided into upper and lower two regions；In side wall lower ends
Square region forms conductive abrasive grain layer by plating mode mosaic diamond abrasive grain；Side wall lower ends lower zone passes through resin-bonded
Agent mosaic diamond abrasive grain forms insulation abrasive grain layer；There is blind hole at the tool cathode center, and side wall distribution is several to be connected to blind hole
Spray hole.
The application method of the tool cathode of the described raising electrolysis milling processing soffit plane degree, it is characterised in that including with
Lower process：Tool cathode is mounted in lathe shaft, and connects power cathode, and workpiece connects positive pole；When processing, electrolyte
It is sprayed by tool cathode spray hole, the side clearance full of tool cathode and workpiece and bottom surface gap；Tool cathode side is work
Make face, workpiece material is removed under the electrolysis of conductive abrasive grain layer, ablation and the ablation for the abrasive grain layer that insulate；
It insulate under abrasive grain layer and bottom surface insulating layer collective effect, reduces the current density on processing bottom surface, improve electrolysis milling and process bottom
The flatness in face.
The tool cathode side wall lower ends are formed insulation abrasive grain layer, are used by resinoid bond mosaic diamond abrasive grain
It is cloudy to reduce tool for resinoid bond, the purpose that can be played mosaic diamond abrasive grain and insulate to tool cathode side wall lower ends
Re-electrolysis of the pole side wall to the machined bottom surface of electrolysis milling；It is logical that the tool cathode side wall is close to insulation abrasive grain layer upper area
Plating mode mosaic diamond abrasive grain is crossed, mosaic diamond abrasive grain can be played using plating mode by forming conductive abrasive grain layer,
The electrolysis between tool cathode side wall and workpiece is not influenced again；The tool cathode bottom surface carries out insulation processing, forms bottom
Face insulating layer can largely reduce the current density of workpiece machined surface, have to tool cathode bottom surface all insulation
The flatness of bottom surface is processed conducive to raising electrolysis milling.
The tool cathode of the raising electrolysis milling processing soffit plane degree, it is characterised in that：Bottom surface thickness of insulating layer
No more than 0.1mm.After the insulation of tool cathode bottom surface, bottom conductive area is reduced, and the current density for processing bottom surface is caused to reduce
（See Fig. 4）.Workpiece ablation speed is small under low current density, and processing gap also reduces, it is therefore desirable to control bottom surface thickness of insulating layer
Bottom surface insulating layer is avoided to be in direct contact and be worn with workpiece.
The present invention has the following advantages：
1, the tool cathode of isolation recesses is opened up using bottom surface（See Fig. 2）, the abrasive grain layer of side wall lower ends still falls within conductive region,
There are conducting rings in bottom surface outer circle region, these all can generate re-electrolysis to workpiece machined surface, reduce bottom surface machining accuracy.
And tool cathode provided by the invention（See Fig. 1）, side wall lowermost distal end region is using resinoid bond by diamond abrasive grain and work
Have cathode to combine, forms insulation abrasive grain layer, reduce the conductive area of side wall, bottom surface, can be notable by the way of all insulation
The current density for reducing processing bottom surface, reduces the re-electrolysis of machined surface, improves the soffit plane degree of processing.
2, the current density distribution and electricity that can utilize simulation software simulation inventive article cathode base surface area are distributed
（Such as Fig. 4 and 6）, determine the suitable insulation abrasive grain floor height under the conditions of different cathode diameters, machining voltage, electrolyte parameter etc.
Degree, experiment that need not be repeatedly determine, to simplify tool design, shorten the design cycle.
3, electrolysis milling tool cathode provided by the invention, side wall successively pass through resinoid bond and plating mode mosaic gold
Hard rock abrasive grain, bottom surface then use simple all insulation mode, and tool cathode is simple in structure, and preparation difficulty is low, and processing cost is low.
Description of the drawings
Fig. 1 is tool cathode schematic diagram provided by the invention；
Fig. 2 is the tool cathode schematic diagram that bottom surface opens up isolation recesses；
Fig. 3 is inventive article catholyte milling machining sketch chart；
Fig. 4 is the current density distributing figure that inventive article cathode processes bottom surface Electric Field Simulation；
Fig. 5 is the current density distributing figure for the tool cathode processing bottom surface Electric Field Simulation that bottom surface opens up isolation recesses；
Fig. 6 is the electricity comparison diagram of Electric Field Simulation when different tool cathodes are processed；
Figure label title：1, tool cathode；2, diamond abrasive grain；3, conductive abrasive grain layer；4, insulate abrasive grain layer；5, bottom insulation
Layer；6, workpiece；7, bottom surface is processed；8, power supply.
Specific implementation mode
With reference to specific attached drawing, the present invention is described in further detail.
As shown in Figure 1, a kind of electrolysis milling machining tool cathode provided by the invention, it is characterised in that：The tool is cloudy
1 bottom surface of pole carries out insulation processing, forms bottom surface insulating layer 5；1 side wall lower ends of the tool cathode are divided into upper and lower two regions；Side
Wall lower end upper area forms conductive abrasive grain layer 3 by plating mode mosaic diamond abrasive grain 2；Side wall lower ends lower zone is logical
Resinoid bond mosaic diamond abrasive grain 2 is crossed, insulation abrasive grain layer 4 is formed；There are blind hole, side wall distribution in 1 center of the tool cathode
Several spray holes being connected to blind hole.
As shown in figure 3, the application method of the tool cathode of the raising electrolysis milling processing soffit plane degree, feature
It is to include following procedure：When processing, electrolyte is sprayed by 1 spray hole of tool cathode, is full of the side of tool cathode 1 and workpiece 6
Face gap and bottom surface gap；1 side of tool cathode be working face, 6 material of workpiece conductive abrasive grain layer 3 electrolysis, grinding
It is removed under effect and the ablation of insulation abrasive grain layer 4；Under insulation abrasive grain layer 4 and 5 collective effect of bottom surface insulating layer, reduce
The current density on bottom surface 7 is processed, the flatness of electrolysis milling processing bottom surface is improved.
As shown in Fig. 4 ~ 6, since tool cathode matrix is cylinder, to shorten simulation time, it is imitative that this sentences static field
It is very emulated instead of rotating electric field, static field simulation parameter is：Anode voltage 30V, tool cathode diameter 10mm, between processing
Gap 0.4mm, machining area length are 13.4mm, electrolytic conductivity 15S/m, a diameter of 9mm of bottom surface isolation recesses, this hair
Bright tool cathode lateral wall insulation abrasive grain floor height 0.5mm.When opening up the tool cathode electrolysis milling processing of isolation recesses using bottom surface,
It is influenced by bottom surface outmost turns conductive region, the prodigious annular region of current density occurs in workpiece surface（Fig. 5）, use this hair
After bright tool cathode, since side wall bottom is insulated, bottom surface all insulation greatly reduces the current density of processing bottom surface（Figure
4）, and the distribution of current density is more uniform.According to Ferrari law, when Electrolyzed Processing, the matter of workpiece anode material removal
Measure with by electric current it is linear, in order to preferably observe the advantage of inventive article cathode, take shown in Fig. 4 and Fig. 5
Straight line, if the electricity done on line when calculating processing（Fig. 6）, it can be seen that when using the tool cathode processing for opening up groove,
It processes that there are the very high outburst areas of two electricity at bottom surface both ends, and twice of about intermediate region electricity, thus can make
At processing bottom surface both ends severe depression, soffit plane degree is reduced.When tool cathode using the present invention, the electricity at bottom surface both ends is processed
Outburst area is measured to disappear, the electricity of most areas distributes very evenly on line, and with the tool cathode phase that opens up groove
Than the former power spikes are even less than the 1/4 of the latter intermediate region electricity, and therefore, inventive article, which can not only improve, to be added
The flatness of work bottom surface, moreover it is possible to significantly reduce the mistake amount of cutting of processing bottom surface.
The present invention can improve the bottom surface flatness of electrolysis milling processing, but above description can not be interpreted as to this hair
The limitation of bright patent.It should be noted that for others skilled in the art, before not departing from present inventive concept
It puts, several improvement can also be made, these should all fall into the protection of patent of the present invention.
Claims (3)
1. a kind of tool cathode improving electrolysis milling processing soffit plane degree, it is characterised in that：
The tool cathode（1）Bottom surface carries out insulation processing, forms bottom surface insulating layer（5）；
The tool cathode（1）Side wall lower ends are divided into upper and lower two regions；Side wall lower ends upper area is inlayed by plating mode
Diamond abrasive grain（2）, form conductive abrasive grain layer（3）；Side wall lower ends lower zone passes through resinoid bond mosaic diamond abrasive grain
（2）, form insulation abrasive grain layer（4）；
The tool cathode（1）Center has blind hole, side wall to be distributed several spray holes being connected to blind hole.
2. the tool cathode according to claim 1 for improving electrolysis milling processing soffit plane degree, it is characterised in that：Bottom surface
Insulating layer（5）Thickness is not more than 0.1mm.
3. the application method of the tool cathode according to claim 1 for improving electrolysis milling processing soffit plane degree, special
Sign is to include following procedure：
Tool cathode（1）In lathe shaft, and connect power supply（8）Cathode, workpiece（6）Connect power supply（8）Anode；
When processing, electrolyte is by tool cathode（1）Spray hole sprays, and is full of tool cathode（1）And workpiece（6）Side clearance with
Bottom surface gap；Tool cathode（1）Side is working face, workpiece（6）Material is in conductive abrasive grain layer（3）Electrolysis, grinding make
With with insulation abrasive grain layer（4）Ablation under be removed；In insulation abrasive grain layer（4）With bottom surface insulating layer（5）Under collective effect,
Reduce processing bottom surface（7）On current density, improve electrolysis milling processing bottom surface flatness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047135.1A CN108393547A (en) | 2018-01-18 | 2018-01-18 | Improve the tool cathode and method of electrolysis milling processing soffit plane degree |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810047135.1A CN108393547A (en) | 2018-01-18 | 2018-01-18 | Improve the tool cathode and method of electrolysis milling processing soffit plane degree |
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| Publication Number | Publication Date |
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| CN108393547A true CN108393547A (en) | 2018-08-14 |
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ID=63094734
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810047135.1A Pending CN108393547A (en) | 2018-01-18 | 2018-01-18 | Improve the tool cathode and method of electrolysis milling processing soffit plane degree |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175552A (en) * | 2018-10-08 | 2019-01-11 | 深圳市圆梦精密技术研究院 | Electrode and preparation method thereof and electrochemical machining apparatus |
| CN111215709A (en) * | 2020-02-24 | 2020-06-02 | 广东工业大学 | Novel electrode composite electric machining device and machining method |
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| CN105215488A (en) * | 2015-10-15 | 2016-01-06 | 南京航空航天大学 | Electrolysis milling Compound Machining negative electrode grinding head device |
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Patent Citations (6)
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| JPH10225821A (en) * | 1997-02-13 | 1998-08-25 | Shinko Pantec Co Ltd | Electrolytic polishing jig |
| CN201168839Y (en) * | 2008-02-21 | 2008-12-24 | 常州工学院 | Composite cathode for numerical control electrolysis machine tool |
| US20120006691A1 (en) * | 2010-07-08 | 2012-01-12 | Yuefeng Luo | Method, apparatus and system for flexible electrochemical processing |
| CN105215488A (en) * | 2015-10-15 | 2016-01-06 | 南京航空航天大学 | Electrolysis milling Compound Machining negative electrode grinding head device |
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| CN109175552A (en) * | 2018-10-08 | 2019-01-11 | 深圳市圆梦精密技术研究院 | Electrode and preparation method thereof and electrochemical machining apparatus |
| CN109175552B (en) * | 2018-10-08 | 2020-05-05 | 深圳市圆梦精密技术研究院 | Electrode, method for producing same, and electrochemical machining apparatus |
| CN111215709A (en) * | 2020-02-24 | 2020-06-02 | 广东工业大学 | Novel electrode composite electric machining device and machining method |
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Application publication date: 20180814 |