CN101052751A - Electrochemical machining tool and method for machining a product using the same - Google Patents
Electrochemical machining tool and method for machining a product using the same Download PDFInfo
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- CN101052751A CN101052751A CN 200580031236 CN200580031236A CN101052751A CN 101052751 A CN101052751 A CN 101052751A CN 200580031236 CN200580031236 CN 200580031236 CN 200580031236 A CN200580031236 A CN 200580031236A CN 101052751 A CN101052751 A CN 101052751A
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Abstract
An electrochemical machining tool (1) for electrochemical machining includes an electrode body (11). The electrochemical machining tool (1) and associated method can conduct simultaneous electrochemical machining of at least two of a radial dynamic pressure generating groove (43), an axial dynamic pressure generating groove (44) , and a removal of a burr (42) associated with an oil pool (41). Electrochemical machining is performed with groove machining electrodes (12, 13) and deburring electrodes (14). A sleeve (4) machined using the electrochemical machining tool (1) and associated method has the radial dynamic pressure generating groove (43) , the axial dynamic pressure generating groove (44) , and the deburred oil pool (41). The sleeve (4) can be used in a hydrodynamic pressure bearing for use in a spindle motor of a hard disk drive.
Description
The cross reference of related application
The application based on the Japanese patent application No.2004-272505 that submitted on September 17th, 2004 and the Japanese patent application No.2005-207881 that submitted on July 15th, 2005 and in conjunction with them as a reference.
Technical field
The present invention relates to electro-chemical machining (ECM), relate more specifically to electrochemical machiningtool and use this electrochemical machiningtool to make for example working method of bearing sleeve of high-quality product with low cost.
Background technology
For example comprise electrode and have direct supply and the pulse current source that is used for applying pulsed current of control device to workpiece and electrode at the traditional electrical chemical process equipment that is used for deburring described in the Japanese patent application H10-277842 of not authorization.Electrode comprises the machined electrode and the electrode that is used to detect the location of workpiece that is used for to the workpiece deburring.Be supplied with electrolytic solution between workpiece and electrode, workpiece aligns with respect to electrode at specified location.
For direct supply, positive terminals (+) are connected to workpiece, and negative terminals (-) are connected to workpiece machined electrode and the electrode that is used to detect the location of workpiece via control device.But should be pointed out that above-mentioned document will be used for the workpiece machined electrode of deburring and pulse current source describes as the universal that is not easy to by those of ordinary skill in the art realizes.
As for example not the authorization Japanese patent application 2000-198042 described in, also known during electro-chemical machining, using honing (hone) electrode tool---this honing electrode tool has with hone that acts on ultrasonic machining and the structure that is used for the electrode tool of electro-chemical machining, has the inner wall surface that the roughly ultrasonic vibration of uniform strength can directly be transmitted to the machining hole of workpiece.Simultaneously, electrochemical effect is based on the electro-chemical machining on the inner wall surface of the machining hole of workpiece and work.As a result, because the effect and the electrochemical effect of ultrasonic vibration, the part with recess that traditional brush can't arrive obtains effective cleaning.Metal fragment and burr, for example fine particle and swarf can effectively be removed.
Known in addition, comprise that at traditional electro-chemical machining in electrochemical deburring and the electrochemical etching process, any in deburring and the polishing process all can be carried out separately, perhaps the two can carry out simultaneously.In addition, when guaranteeing to have stable conductivity, can form in some way, with the particular result that obtains to be associated with processing with the electrolytic solution of work in-process.For example, electrolytic solution can comprise can promote surface oxidation so that the oxygenant of metallic surface of dissolving workpiece to be processed can be kept the polarity toughener of concentration polarization, and the inhibitor that can suppress the workpiece metal surface corrosion that caused by etched elements.Among Shen Ding the Japanese patent application H07-316899 such electrolyte solution has not been described, it comprise have oxygenant, one or more the combination in a kind of, two kinds or all three kinds the various electrolytic solution in polarity toughener or the inhibitor.
In addition, as for example not the authorization Japanese patent application H11-207530 described in, electro-chemical machining equipment can have machined electrode, and these machined electrodes are arranged to form the groove with designated shape by the electro-chemical machining that the interior perimeter surface of cover for seat member is carried out.Machined electrode can comprise the groove machined electrode that can form one or more grooves and can carry out the truing electrode of finishing (finishing) operation, in finishing process, cover for seat member and machined electrode along specified related side to moving, the groove machined electrode forms groove on the interior perimeter surface of cover for seat member, and the described interior perimeter surface of truing electrode finishing.
But the processing radial dynamic pressure of going up in interior week of understanding present cover produces groove although above-mentioned reference is put it briefly, and the processing of the specified location on cover for seat edge axial hydrodynamic is not produced groove and describes.
Summary of the invention
In order to overcome the above-mentioned restriction of known process tool and method, the invention provides the working method of a kind of electrochemical machiningtool and use this electrochemical machiningtool as herein described, described tool and method can be with the high-quality converted products of low cost production.More specifically, electrochemical machiningtool of the present invention and working method have reduced and the processing work quantity of the step that is associated of hydrodynamic pressure bearing cover for seat for example, because the setting of the placement of workpiece cover for seat or setting and electrochemical machining of workpiece only need be carried out once.
As described, for example high quality and the processing cheaply of bearing sleeve can realize with the quantity that is used for other operation that cover for seat processes by reducing the operation relevant with installing (set-up) workpiece.For example, workpiece and electrochemical machiningtool can once be installed, and available according to electrochemical machiningtool according to the present invention carry out operation with simultaneously or optionally in workpiece the specified location on the perimeter surface carry out the processing that radial dynamic pressure produces groove, specified location on the edge surface of workpiece or cover for seat is carried out the processing of axial hydrodynamic groove, and carries out deburring processing so that the oil sump on the interior perimeter surface of workpiece or cover for seat (oil pool) locates to remove the burr that machine processes.
Be appreciated that described electrochemical machiningtool and working method can be used to processing work and also produce thus to satisfying the needs product processed of high speed, high-precision applications, for example can be used in the hydrodynamic pressure bearing of hard disk Spindle Motor.Like this, when explanation electrochemical machiningtool of the present invention and working method, although the focus that illustrates concentrate on unique aspect of the present invention for example radial dynamic pressure produce the formation that groove and axial hydrodynamic produce groove, but will illustrate as this paper, can on different surfaces, form a series of this grooves, to be used for for example work of the cover for seat of hydrodynamic pressure bearing.When explanation electrochemical machiningtool of the present invention and method, term " workpiece " can be used to replace cover for seat, because producing product for example during cover for seat, tool and method of the present invention is applied to according to workpiece of the present invention, for example a metal charge etc.
Electrochemical machiningtool comprises electrode body, and this electrode body can be arranged to carry out any electro-chemical machining operation, for example axial groove processing, radial slot processing and deburring; Electrochemical machiningtool also comprises the insulation guiding tool, and this insulation guiding tool has electrolyte passage and forms function and be used to make machined electrode with respect to workpiece or the localized positioning function of cover for seat.In one embodiment, electrode body has the electro-chemical machining electrode that is used to process axial and radial slot, and the electrochemical deburring electrode.In this embodiment, all courses of processing can be carried out simultaneously.
Electrochemical machiningtool is arranged to move back and forth to and fro along an axis on demand, thus electrochemical machiningtool removable away from or move near and contact workpiece cover for seat for example that the support tool supporting arranged.Be pressed against by edge on the end face of the edge that will form the axial hydrodynamic groove thereon of cover for seat or support tool and can realize contacting very closely guiding tool.Because the edge of guiding tool is pressed against, and can guarantee that an electro-chemical machining gap is to be used to comprise electrolyte stream.
More specifically, guiding tool can have and protuberance, and this protuberance is arranged to force together with the edge that will form the axial hydrodynamic groove thereon of workpiece or the edge of work mounting s instrument, so that guarantee to be used to form the electro-chemical machining gap of electrolyte passage.Guiding tool and electrode body can manufacture by slide mechanism and screw and relative to one another (relative to each other) move so that these two parts can be regulated relative to one another.Therefore, when the wearing and tearing of protuberance for example, guiding tool and electrode body can be readjusted guaranteeing during operation and closely contact and keep-up pressure.Therefore, by changing the relative position of guiding tool and electrode body, they can be readjusted relative to one another.
According to the first embodiment of the present invention, the electrode body of electrochemical machiningtool can comprise to be arranged to simultaneously to produce on groove, the interior perimeter surface at workpiece and form the machined electrode that radial dynamic pressure produces groove and can remove the machined burrs of oil sump forming axial hydrodynamic on the edge of workpiece.Machined burrs is relevant with the independent processing of oil sump, and oil sump is that mechanical workout is come out on the interior perimeter surface of workpiece.The oil sump that is formed by mechanical workout can be arranged on the optional position on the perimeter surface in the workpiece.For example, it can be machined in radial dynamic pressure and produce on the inboard between the groove, or is machined on the outside that radial dynamic pressure produces groove.
Perhaps, the electrode body of electrochemical machiningtool can comprise the machined electrode of being arranged to produce at formation axial hydrodynamic on the edge of workpiece simultaneously formation radial dynamic pressure generation groove on groove and the interior perimeter surface at workpiece.Removing the deburring processing of the machined burrs of oil sump carries out separately.
According to a second embodiment of the present invention, the electrode body of electrochemical machiningtool can comprise that being arranged to the while forms the electro-chemical machining electrode that axial hydrodynamic produces groove and electrochemical deburring or removes the machined burrs of the oil sump that mechanical workout goes out on the perimeter surface in workpiece on the edge of workpiece.The electro-chemical machining that radial dynamic pressure on the interior perimeter surface of workpiece produces groove carries out separately.
A third embodiment in accordance with the invention, the electrode body of electrochemical machiningtool can comprise is arranged to form simultaneously the machined electrode that radial dynamic pressure produces groove and deburring or removes the machined burrs of oil sump on the interior perimeter surface of workpiece.The electro-chemical machining that axial hydrodynamic on the edge of workpiece produces groove carries out separately.
But the electrode body of electrochemical machiningtool of the present invention and ECM method production cover for seat as herein described.The electro-chemical machining of the electrochemical machiningtool of the application of the invention is made cover for seat by for example metal charge.Perhaps, cover for seat also can represent have an above-mentioned cover for seat be used for for example hydrodynamic pressure bearing of hard disk Spindle Motor of Spindle Motor.
Electrochemical machiningtool of the present invention and method for electrochemical machining allow the axial hydrodynamic that carries out in the specified location of the edge of work produce the processing of groove, the radial dynamic pressure that carries out in the specified location of work piece inner surface produces the processing of groove and the deburring processing of the oil sump on the work piece inner surface is carried out simultaneously as single process, and the position of workpiece and machined electrode is only set once.According to independent example, electrochemical machiningtool and method for electrochemical machining allow workpiece is carried out handling flexibly by allowing to carry out operation or their combination simultaneously or in succession as described above.
For example, processing and deburring processing with axial hydrodynamic generation groove of similar electro-chemical machining condition can at first be carried out, and can carry out the processing that radial dynamic pressure produces groove then.As a result, compare, can reduce the quantity of independent processing step with the electro-chemical machining of once carrying out a processing step of prior art.In addition, according to the present invention, after the set positions of workpiece and machined electrode was good, workpiece and machined electrode were maintained fixed motionless, kept thus rather than had reduced precision.In addition, can omit common required scrubbing (brushing) process after the deburring process of prior art, this allows further to reduce cost and keeps or improve precision.
Description of drawings
With following detailed description together in conjunction with in this manual and the accompanying drawing that constitutes this specification sheets part be used for all further setting forth each embodiment and explaining various principle and advantages according to the present invention, identical in the accompanying drawings label is represented the identical or intimate element in each independent view.
Figure 1A illustrates to comprise the diagram of the cross sectional view of the parts of electrochemical machiningtool and cover for seat support tool according to an embodiment of the invention.
Figure 1B illustrates to comprise the diagram of another cross sectional view of the parts of electrochemical machiningtool and cover for seat support tool in accordance with another embodiment of the present invention.
Fig. 2 is one the diagram that illustrates in two cross sectional view of Figure 1A and Figure 1B, comprises the parts of electrochemical machiningtool according to an embodiment of the invention.
Fig. 3 illustrates to comprise the diagram of the cross sectional view of the parts of electrochemical machiningtool in accordance with another embodiment of the present invention.
Fig. 4 illustrates the diagram of the enlarged view of oil sump and deburring electrode according to an embodiment of the invention.
Fig. 5 illustrates the diagram that machined electrode and electrolyte passage according to an embodiment of the invention form schematic representation of apparatus.
Fig. 6 is the diagram that the synoptic diagram of the electrode body that machined electrode is shown according to an embodiment of the invention is shown.
Fig. 7 is the diagram that the skeleton view of the exemplary sleeve that each embodiment according to the present invention processes is shown.
Fig. 8 is the diagram that the hydrodynamic pressure bearing that uses electrochemical machiningtool that adopts each embodiment according to the present invention and the cover for seat that method produces is shown.
Embodiment
The present invention is described in detail with reference to the accompanying drawings now.For some parts, those skilled in the art are understood not necessarily local demonstration and the explanation of omitting them of the present invention in their appearance.
Figure 1A and Figure 1B illustrate two views of electrochemical machiningtool 1.The protuberance 22 of the insulation guiding tool 2 shown in Figure 1A leans against on the cover for seat support tool 3.Shown in Figure 1B, protuberance 22 leans against workpiece for example on the cover for seat 4.
As reference Figure 1A, Figure 1B and shown in Figure 2, electrochemical machiningtool 1 comprises electrode body 11, be used for forming in cover for seat 4 machined electrode 12 that radial dynamic pressure produces groove, be used for forming cover for seat 4 in the deburring machined electrode 14 by the burr of the mechanical workout generation of cover for seat 4 that axial hydrodynamic produces the machined electrode 13 of groove and is used to remove oil sump place on the interior perimeter surface of cover for seat 4 for example.Electrochemical machiningtool 1 also can comprise insulation guiding tool 2, electrolyte entrance 21, protuberance 22 and cover for seat support tool 3.Hereinafter will be described in more detail these and other parts.Should be appreciated that as described cover for seat 4 can be counted as workpiece, and be cited like this interchangeably in this article.Can for example refer to have cover for seat axial and radial dynamic pressure generation groove for quoting of exemplary cover for seat 4, for example be used for the cover for seat of hydrodynamic pressure bearing.
Fig. 5 illustrates electrode body 11, machined electrode 12, machined electrode 13 and deburring electrode 14. Machined electrode 12,13 and 14 can be arranged to remove body refuse by the reverse switching that can be applied to the electric current on machined electrode 13, machined electrode 12 and the deburring electrode 14.
As described, the present invention allows to carry out simultaneously the axial hydrodynamic generation groove course of processing of carrying out in the specified location on the edge of work, the radial dynamic pressure that the specified location in workpiece on the perimeter surface is carried out produces the groove course of processing, and the deburring course of processing of being arranged to the burr that for example the removal machine of the oil sump place on the perimeter surface processes in workpiece.
Perhaps, the axial hydrodynamic that can use electrode body 11 to have similar electro-chemical machining condition simultaneously produces the electro-chemical machining of groove and the electrochemical deburring of oil sump, and for example using again in independent step, another electrode body (not shown) carries out the electro-chemical machining that radial dynamic pressure produces groove.Should be pointed out that according to present embodiment electrode body 11 can include only machined electrode 13, for example as shown in Figure 3, and be arranged to for example deburring electrode 14 of the burr that goes out of machining of fin cutting.The processing of the radial dynamic pressure of the specified location on perimeter surface generation groove can use the independent electrode body that includes only machined electrode 12 to carry out in workpiece subsequently.
In addition, the radial dynamic pressure of the specified location in workpiece on the perimeter surface produces the processing of groove can at first carry out, and then carries out processing and deburring processing that axial hydrodynamic produces groove simultaneously.
Should be pointed out that for example as shown in Figure 4 in the mechanical workout of the interior perimeter surface of having carried out cover for seat 4 and formed oil sump 41 in cover for seat 4 after, machined burrs 42 remains in and adds in the Ministry of worker.Electrode body 11 of the present invention can have deburring electrode 14 so that remove machined burrs 42 by electro-chemical machining.
For example as shown in Figures 2 and 3, electrochemical machiningtool 1 of the present invention can be included in the electrode body 11 on its edge.Electrode body 11 can comprise the small diameter portion that diameter is slightly smaller than the internal diameter of cover for seat 4 less than the external diameter of cover for seat 4 greater than the major diameter part and the diameter of the internal diameter of cover for seat 4.Be arranged in specified location on the edge of cover for seat 4 and form the machined electrode 13 that axial hydrodynamic produces groove and be arranged on the surface of major diameter part, form radial dynamic pressure on the interior perimeter surface of cover for seat 4 and produce the machined electrode 12 of groove and/or be arranged to the oil sump place on the interior perimeter surface of cover for seat 4 for example and remove the deburring electrode 14 of the burr that machine processes and be arranged on the outer surface of small diameter portion and be arranged in.Electrochemical machiningtool 1 of the present invention also can comprise lining 5, and this lining can use screw etc. to be installed on the electrode of processing units.In addition, except on machined electrode 12,13 and 14, the surface coverage that contacts with electrolytic solution of electrode body 11 has insulating coating.
More specifically, as will be described in more detail, the insulation guiding tool 2 that is installed on the electrode body 11 can move around with electrochemical machiningtool 1.For example can see from Figure 1A that insulation guiding tool 2 can be positioned to protuberance 22 by making insulation guiding tool 2 and promptly be pressed against together from the edge of outstanding slightly part of the major diameter of electrode body 11 part and the support tool 3 that is used to support cover for seat 4 and closely contact with support tool 3.Perhaps, insulation guiding tool 2 can be arranged to be pressed against together by the edge that makes insulation protuberance 22 of guiding tool 2 and cover for seat 4 and closely contact with for example cover for seat 4, as for example being supported appreciable from Figure 1B.
By pushing the protuberance 22 of insulation guiding tool 2 in the above described manner, the electrolyte passage that cover for seat adds in the Ministry of worker is formed, and electrolytic solution can be introduced from the inlet 21 of insulation guiding tool 2, thereby allows the edge of cover for seat 4 and the specified portions of interior perimeter surface are carried out electro-chemical machining.Should be pointed out that and to use synthetic resins on sale on pottery on sale on the market or the market to form insulation guiding tool 2.Be to be understood that, the preferred synthetic resins that uses obtains desired flexibility, and this is because the flexibility of the protuberance 22 of insulation guiding tool 2 makes that electrolytic solution is difficult to leakage when insulation guiding tool 2 closely contacts with the edge of support tool 3 or cover for seat 4 as mentioned above under pressure.
Except the 2 aforesaid motions of insulation guiding tool, insulation guiding tool 2 and the support tool 3 that is used for cover for seat 4 can move around, thus the protuberance 22 that allows insulation guiding tool 2 under pressure with the edge of cover for seat 4 or be used for the edge contact of the support tool 3 of cover for seat 4.Therefore, electrolytic solution can be introduced and not leak from the inlet 21 of electrolyte passage, and forms electrolyte passage in cover for seat processing portion, allows thus the edge of cover for seat 4 and the specified portions of interior perimeter surface are carried out electro-chemical machining.
For how the formation of understanding electro-chemical machining and electrolyte passage better realizes as described above, can carry out some commentaries with reference to electrode body shown in Figure 5 11.Electrochemical machiningtool 1 of the present invention has the basic structure that comprises electrode body 11 and insulation guiding tool 2.Insulation guiding tool 2 is installed on the electrode body 11 and the motion of insulation guiding tool 2 and electrode body 11 can be carried out as described above.
But should be pointed out that protuberance 22 can wearing and tearing, for example this be since as Fig. 2 and Fig. 3 in detail shown in, protuberance 22 is pressed against the axial hydrodynamic groove lateral margin of cover for seat 4 or is used for the edge of the support tool 3 of cover for seat 4.Therefore, can use for example aforesaid lining 5 of slide mechanism and screw and corresponding screw that insulation guiding tool 2 and electrode body 11 are relatively moved.Should be pointed out that lining 5 is used for electrochemical machiningtool is attached on the electro-chemical machining equipment.In addition, when when the smaller diameter side machined electrode is looked, form the axial hydrodynamic that axial hydrodynamic produces groove and produce groove machined electrode 13 for example to construct in the mode shown in Fig. 5 bottom.
Those skilled in the art will appreciate that electrode uses electro-conductive material to obtain electro-chemical machining result described herein.The electrode body material that is used for electrochemical machiningtool of the present invention---comprise handle or machined electrode---be exemplified as copper alloy or iron alloy.One of copper alloy is exemplified as brass, iron alloy be exemplified as austenitic stainless steel, be the steel that for example has for Japanese Industrial Standards (JIS) title of SUS303, SUS304 etc. at this austenitic stainless steel known in the art.Although many materials all can be used as the part except that electrode that insulating resin comes the insulated electro polar body, insulating material should have ionogen NaNO for example
3The high resistance of (SODIUMNITRATE) and should have the tack of good counter electrode body material.Ideally, should select Resins, epoxy, urethane resin or polyimide resin, wherein Resins, epoxy has superior performance characteristic.Be used for exemplary workpiece for example the ideal base material of cover for seat 4 also can be selected from copper alloy or iron alloy.As mentioned above, one of copper alloy is exemplified as brass, and the example of iron alloy is for example to be the austenitic stainless steel of SUS303, SUS304 etc.
Although following paragraph shows detailed example and embodiment, they only are used for exemplary purpose.The invention is not restricted to these embodiment.
According to first embodiment, use electrochemical machiningtool 1 of the present invention to carry out the electro-chemical machining that electro-chemical machining, axial hydrodynamic that radial dynamic pressure produces groove produce the electro-chemical machining of groove and be used for deburring simultaneously.
Be appreciated that oil sump 41 forms by mechanical processing process.To use electrochemical machiningtool 1 of the present invention to carry out electro-chemical machining by the cover for seat 4 that forms through rough machined austenite stainless alloy as described.
As shown in Figure 2, electrochemical machiningtool 1 of the present invention comprises insulation guiding tool 2 and electrode body 11.Electrode body 11 comprises the machined electrode 13 that forms axial hydrodynamic on the edge that is positioned at its major diameter part and is arranged in cover for seat 4 and produce groove, be positioned at the small diameter portion of electrode body 11 and be arranged in and form radial dynamic pressure on the perimeter surface of cover for seat 4 and produce the machined electrode 12 of groove and be positioned at the small diameter portion of electrode body 11 equally and be arranged to remove the deburring electrode 14 of machined burrs at oil sump 41 places of the perimeter surface of cover for seat 4.With reference to Fig. 4 should be pointed out that oil sump 41 by mechanical workout for example the turning of cover for seat 4 on lathe form.Deburring is to use can be undertaken by the electrochemical machiningtool of the present invention 1 that austenitic stainless steel is made as mentioned above.
The support tool 3 of electrochemical machiningtool 1, insulation guiding tool 2 and maintenance cover for seat 4 can be set or be placed in and specify or the predetermined position.Carry out electro-chemical machining cover for seat 4 be placed in the depression support of support tool 3.Electrochemical machiningtool 1 descends then, and under a certain size the effect of power, the edge of the protuberance 22 of insulation guiding tool 2 is pushed on the edge of cover for seat 4, guarantees electrolytic solution flowing to carry out electro-chemical machining in the electro-chemical machining gap thus.
Be appreciated that, by as hereinafter will being described in more detail in cover for seat 4 and comprise therein on the electrode body 11 of machined electrode 12,13 and deburring electrode 14 and apply machining voltage, the electrolytic solution in the electro-chemical machining gap can be from electrode surface by electrolytic solution to cover for seat 4 conduction current and the molecule that reacts and be associated with the local surfaces of cover for seat 4 with the surface of cover for seat 4 with by electrochemical reaction ionization and removal.In cover for seat 4, form thus with electrode body 11 on the corresponding groove of electrode pattern that exposes.
As well known, electrolytic solution can cycling and reutilization.For example, the electrolytic solution in the electrolyzer can be fed to the sludge removal (not shown) to be used to remove the body refuse that produces during electro-chemical machining.The electrolytic solution of having removed body refuse can return, reclaim or be fed to again the electrolytic solution source of supply.Recovery electrolytic solution in the electrolytic solution source of supply can be fed to electrolyzer with the transfer pump (not shown).Should be understood that, described in the Japanese patent application H11-207530 of above-mentioned not authorization, the inlet 21 of electrochemical machiningtool 1 of the present invention can comprise that known electrolytic solution retrieving arrangement is to make the circulation of elecrolyte in the electrolyzer (not shown) during electro-chemical machining as for example.Electrolytic solution is fed to the electrolytic solution retrieving arrangement and from the supply of electrolytic solution retrieving arrangement, the electrolytic solution retrieving arrangement for example comprises the transfer pump of the sludge removal that has strainer, the container tanks that comprises electrolytic solution and supply electrolytic solution.
The size of the size of the small diameter portion by control electrode body 11 or the internal diameter of cover for seat 4, the gap between the electrode 12,13,14 of the internal surface of cover for seat 4 and electrode body 11 is controlled, and to make the position that the center of the center of present cover 4 and machined electrode 12,14 overlaps be the distance of tens microns (μ m).The those of ordinary skill in ECM field can be understood the importance that clearance distance is controlled.In addition, about the gap between the edge of electrode 13 and the cover for seat 4 that is supported, the height that preestablishes protuberance 22 makes that this gap becomes tens microns (μ m) under the tight state of contact that is under the pressure.The edge of the protuberance 22 of insulation guiding tool 2 and the edge of the cover for seat 4 that is supported closely contact under constant pressure and are maintained fixed motionless.In cover for seat 4 and 1 fixed while of electrochemical machiningtool, electrolyte supply is in the electro-chemical machining gap.
Should be pointed out that electrolyte supply from electrolytic solution source of supply (not shown) supply is to the inlet 21 of insulation guiding tool 2.The gap that interior perimeter surface from the gap between the edge of axial hydrodynamic generation groove machined electrode 13 and cover for seat 4 to cover for seat 4 and radial dynamic pressure produce groove machined electrode 12 and the deburring electrode 14 forms electrolyte passage.Electrolytic solution can flow through this passage so that can carry out electro-chemical machining as described herein thus.
Between electrode 12,13,14 and direct supply, be provided with the Drive and Control Circuit (not shown).Electrolytic solution is supply as described above also.By using Drive and Control Circuit that machining voltage is added on three electrodes 12,13 and 14, the radial dynamic pressure on the axial hydrodynamic generation groove 44 on the edge of cover for seat 4 and the interior perimeter surface of cover for seat 4 produces groove 43 and forms as illustrated in fig. 7.In addition, the machined burrs 42 at oil sump 41 places is removed.
Perhaps, can use electrochemical machiningtool 1 of the present invention to carry out radial dynamic pressure simultaneously and produce the electro-chemical machining of groove and the electro-chemical machining that axial hydrodynamic produces groove.Different with first embodiment, the electro-chemical machining that is used for deburring carries out separately.In this possibility, electrode body 11 includes only radial dynamic pressure and produces groove machined electrode 12 and axial hydrodynamic generation groove machined electrode 13.
Behind the electro-chemical machining that has carried out expection, cover for seat 4 is removed and can scrubs or clean the body refuse that is produced by electro-chemical machining to remove.Can carry out rinsing and drying to cover for seat 4 then.As a result, obtained to have the cover for seat 4 that radial dynamic pressure produces groove and axial hydrodynamic generation groove.
According to second embodiment, axial hydrodynamic produces the electro-chemical machining and the deburring processing of groove to carry out simultaneously, and the electro-chemical machining of radial dynamic pressure generation groove carries out separately.
As shown in Figure 4, the turning process that for example uses lathe, milling machine, lathe etc. to carry out by mechanical workout forms oil sump 41, to make the cover for seat of being made by for example austenitic stainless steel 4.For example as shown in Figure 3, predetermined or specified location are laid or be set in to the support tool 3 of electrochemical machiningtool 1, insulation guiding tool 2 and maintenance or supporting cover for seat 4.Cover for seat 4 is included in the depression support of support tool 3.Electrochemical machiningtool 1 descends then, and under a certain size the effect of power, the edge of the protuberance 22 of insulation guiding tool 2 is pushed on the edge of cover for seat 4, thereby determines the position of the machined electrode of electrochemical machiningtool 1 in the axial direction reliably.Therefore, guaranteed electrolytic solution flowing in the electro-chemical machining gap.
The corresponding position of specified location of the cover for seat 4 that insulation guiding tool 2 can move back and forth back and forth and be set in and will process by a control device (not shown).Cover for seat 4 is included in the depression support of support tool 3 and is supported in specified location thus.The size of the size of the small diameter portion by control electrode body 11 or the internal diameter of cover for seat 4, gap between the electrode 12,14 of the internal surface of cover for seat 4 and electrode body 11 is controlled, and to make the position that the center of the center of present cover 4 and machined electrode 12,14 overlaps be the distance of tens microns (μ m), so that carry out electro-chemical machining as described herein.
In addition, about the gap between the edge of electrode 13 and cover for seat 4, the height that can preestablish protuberance 22 makes that this gap becomes tens microns (μ m) when the edge of protuberance 22 and cover for seat 4 closely contacts under pressure.The edge of the protuberance 22 of insulation guiding tool 2 and the edge of the cover for seat 4 that is supported closely contact under predetermined pressure and are maintained fixed motionless in the fixed position.In cover for seat 4 and 1 fixed while of electrochemical machiningtool, electrolyte supply is in the electro-chemical machining gap.
The electrochemical machiningtool 1 of present embodiment can comprise the electrode body 11 that is positioned at its front end or edge.Electrode body 11 can comprise that axial hydrodynamic produces groove machined electrode 13 and deburring electrode 14.Radial dynamic pressure on the interior perimeter surface of cover for seat 4 produces groove and forms separately.
In the present embodiment, as mentioned above, axial hydrodynamic produces the electro-chemical machining and the deburring processing of groove to carry out simultaneously.Using above-mentioned Drive and Control Circuit (not shown) that machining voltage is added in axial hydrodynamic produces on groove machined electrode 13 and the deburring electrode 14.As shown in Figure 3, electrochemical machiningtool 1 comprises the electrode body 11 that has machined electrode 13, and machined electrode 13 is arranged to carry out the electro-chemical machining that axial hydrodynamic on the edge of cover for seat 4 produces groove.Electrode body 11 also comprises the deburring machined electrode 14 of the machined burrs 42 at oil sump 41 places on the interior perimeter surface of being arranged to remove cover for seat 4.
Can supply with from the inlet 21 of insulation guiding tool 2 from the electrolytic solution of electrolytic solution source of supply (not shown) supply.Interior perimeter surface and the gap the deburring electrode 14 from the gap between the edge of axial hydrodynamic generation groove machined electrode 13 and cover for seat 4 to cover for seat 4 form electrolyte passage.Electrolytic solution can flow through these gaps thus.
As described, between electrode 13,14 and direct supply, be provided with the Drive and Control Circuit (not shown).Can supply electrolytic solution and by for example using driving circuit that machining voltage is added on two electrodes 13 and 14, can on the edge of cover for seat 4, process axial hydrodynamic and produce groove 44 and the machined burrs 42 by deburring electrode 14 removal oil sumps 41 places.In an independent operation, can use such electrochemical machiningtool 1 to process radial dynamic pressure and produce groove, this electrochemical machiningtool 1 is used and is only had the electrode body 11 that radial dynamic pressure produces groove electro-chemical machining electrode 12.
Behind the electro-chemical machining that has carried out expection, cover for seat 4 is removed and can scrubs or clean the body refuse that is produced by electro-chemical machining to remove.Can carry out rinsing and drying to cover for seat 4 then.As a result, obtained to have the cover for seat 4 that radial dynamic pressure produces groove and axial hydrodynamic generation groove.
According to the 3rd embodiment, electrochemical machiningtool of the present invention is used to form the electro-chemical machining process that radial dynamic pressure produces the electro-chemical machining process of groove and is used to remove the burr that is produced by mechanical processing process simultaneously.The electro-chemical machining process that is used to form axial hydrodynamic generation groove is carried out separately.
The electrochemical machiningtool 1 of present embodiment is corresponding to for example as shown in Figure 2 electrochemical machiningtool 1, wherein is used to process the electrode 13 that axial hydrodynamic produces groove and is omitted.In other words, electrochemical machiningtool 1 has electrode body 11 on its front end or edge.Electrode body 11 comprises that radial dynamic pressure produces groove machined electrode 12 and deburring electrode 14.One Drive and Control Circuit (not shown) is got involved between electrode 12,14 and direct supply.By using Drive and Control Circuit, the voltage that is used for processing simultaneously with the deburring process can be added in electrode 12 and 14 in desired mode.In this configuration, the electrode 12 of electrochemical machiningtool 1 and 14 can have point-device relative position, and this is not to be subjected to the influence that electrode 13 exists because can make point-device position of these electrodes on similar face lean on very closely.As a result, the overall accuracy of electrochemical machiningtool 1 increases, and the operation of the installing during the electro-chemical machining process becomes easier.
Be appreciated that, according to present embodiment, the electro-chemical machining process that is used for formation axial hydrodynamic generation groove on the end face of cover for seat is carried out separately by using such electrochemical machiningtool 1, and 11 of the electrode body of this electrochemical machiningtool 1 have the electrode 13 that is used for electro-chemical machining axial hydrodynamic generation groove.About present embodiment, except the textural difference of above-mentioned exemplary electrode 11, its working method is identical with second embodiment, and has obtained identical result; Therefore, omission is to the detailed description of electro-chemical machining process.
According to the foregoing description, electrochemical machiningtool of the present invention can be used for making the hydrodynamic pressure bearing of use cover for seat 4 as shown in Figure 7.Can see that as shown cover for seat 4 can be configured to be roughly the tubular of hollow, this tube has edge surface at its each end, also has interior perimeter surface and outer surface.Can see that on one of the edge surface of cover for seat 4 part axial hydrodynamic produces groove 44, can see that on the interior perimeter surface of cover for seat 4 radial dynamic pressure produces groove 43, also can see oil sump 41 on the interior perimeter surface of cover for seat 4.
As shown in Figure 8, the hydrodynamic pressure bearing that is obtained comprises that radial dynamic pressure on the perimeter surface that is positioned at cover for seat 4 produces groove 43 and the axial hydrodynamic that is positioned on the edge section of cover for seat 4 produces groove 44.Cover for seat 4 also can comprise oil sump 41, and oil sump 41 can as above for example obtain about first, second and the 3rd embodiment describedly.
The turning axle 6 that flange 61 is installed on the one end can insert or be assemblied in the cover for seat 4 so that rotate freely.End cap 7 and tubular sleeve 9 can be used for comprising the parts of hydrodynamic pressure bearing.End cap 7 can have the axial hydrodynamic that for example uses principle as herein described to be formed on its edge surface and produce groove.The end of the periphery of end cap 7 and tubular sleeve 9 can weld together to form cup-shaped.Tubular sleeve 9 is assemblied on the periphery of cover for seat 4 of hydrodynamic pressure bearing and at the outer surface place of hydrodynamic pressure bearing and is sealed to airtight conditions with tackiness agent 15, so that the top of flange 61 and bottom margin produce groove 44 in the face of the axial hydrodynamic of cover for seat 4 respectively and the axial hydrodynamic that is formed on the end cap 7 produces groove 71.
Distance between the surface of the end face of hydrodynamic pressure bearing and end cap 7 can be arranged to use distance piece 8 to form suitably big or small gap, space, cavity etc., and turning axle 6 and flange 61 can be suspended in these gaps, space, the cavity.With hydrodynamic pressure bearing, end cap 7 with comprise that space that the turning axle 6 of flange 61 forms or gap are filled with lubricating oil 10 so that, also will be described further to this during rotation by produce the lubricated and suspension that the dynamic pressure that produces in the oil 10 promotes to comprise the turning axle 6 of flange 61 that acts on of groove by dynamic pressure as herein described.
When turning axle 6 and flange 61 rotations, produce between the groove 43 at the radial dynamic pressure on the interior perimeter surface of turning axle 6 and cover for seat 4, and at flange 61 and be formed on that axial hydrodynamic on the edge section of cover for seat 4 produces groove 44 and the axial hydrodynamic that is formed on the end plate 7 produces between the groove 71, in lubricating oil 10, produce axially and radial dynamic pressure.By with rotation during the relevant castering action of dynamic pressure that produces, turning axle 6 and flange 61 can rotate freely.Importantly should be understood that, although in this article the processing of axial hydrodynamic generation groove and the processing of radial dynamic pressure generation groove are illustrated according to the present invention, but for example as shown in the drawing, the suspension of turning axle 6 and flange 61 is with in the above described manner around the periphery of for example cover for seat 4 or spread all over a series of these class grooves that the edge surface of cover for seat 4 forms and realize.
Electrochemical machiningtool of the present invention and method for electrochemical machining allow radial dynamic pressure produce the processing of groove, the axial hydrodynamic that carries out in the specified location of the internal surface of cover for seat 4 produces the processing of groove and the deburring processing of the oil sump 41 on cover for seat 4 internal surfaces is carried out as single process, and the position of cover for seat 4 and machined electrode 12,13,14 is only set once.Radial dynamic pressure produces electro-chemical machining and the resulting cover for seat that groove, axial hydrodynamic produce groove and the burr relevant with oil sump and provides condition for the production in enormous quantities ability, causes the high industrial applicability (industrialavailability) of associated components or sub-component thus.
Present disclosure is used for explaining how to construct and to use according to various embodiments of the present invention, and is not (exhaustive) of exhaustive or is not that the present invention is limited to disclosed precise forms.Can make amendment or change according to above-mentioned instruction.Selected and explanation to embodiment is to be used for setting forth better principle of the present invention and practical application thereof, and make those of ordinary skill in the art utilize the present invention with the various embodiment and the modification that are suitable for specific expection application, in described various embodiment and modification are in by claims and the determined scope of the present invention of all equivalents thereof when the quilt scope fair, legal, that give equitably according to them makes an explanation.
Claims (23)
1. electrochemical machiningtool that is used for processing work, this electrochemical machiningtool comprises:
Electrode body, this electrode body are arranged to carry out simultaneously at least two in the and the following: the axial hydrodynamic on the described workpiece produces first electro-chemical machining of groove; Be positioned at second electro-chemical machining of the radial dynamic pressure generation groove on the described workpiece; Remove with the electrochemistry that is positioned at the burr on the described workpiece; And
Insulation guiding tool, this insulation guiding tool are configured to make described electrode body also to form electrolyte passage simultaneously with respect to described workpiece location.
2. electrochemical machiningtool according to claim 1, it is characterized in that, when carrying out simultaneously for two in the electrochemistry removal of described first electro-chemical machining, described second electro-chemical machining and described burr, another during the electrochemistry of described first electro-chemical machining, described second electro-chemical machining and described burr is removed carried out separately.
3. electrochemical machiningtool according to claim 1 is characterized in that,
Described workpiece is supported by a support tool; And
Described insulation guiding tool comprises an edge, and this edge is arranged to be pressed against on one of the end face of described support tool and edge of described workpiece, so that guarantee electrolytic solution flowing in described electrolyte passage.
4. electrochemical machiningtool according to claim 1 is characterized in that,
Described workpiece is supported by a support tool; And
What described insulation guiding tool comprised a protuberance and further was configured to this protuberance is pressed against the end face of described support tool and described workpiece produces on one of edge that described first electro-chemical machining of groove is associated with described axial hydrodynamic, so that guarantee electrolytic solution flowing in described electrolyte passage, described electrolyte passage is associated with described first electro-chemical machining that described axial hydrodynamic produces groove.
5. electrochemical machiningtool according to claim 1 is characterized in that, described first electro-chemical machining that described axial hydrodynamic produces groove carries out on the edge of described workpiece.
6. electrochemical machiningtool according to claim 1 is characterized in that, described second electro-chemical machining that described radial dynamic pressure produces groove carries out on the interior perimeter surface of described workpiece.
7. electrochemical machiningtool according to claim 1 is characterized in that, described electrode body is arranged to carry out simultaneously:
Described axial hydrodynamic on the edge of described workpiece produce groove described first electro-chemical machining and
The described deburring electro-chemical machining of described burr.
8. electrochemical machiningtool according to claim 1 is characterized in that, described electrode body is arranged to carry out simultaneously:
Described axial hydrodynamic on the edge of described workpiece produce groove described first electro-chemical machining and
Described radial dynamic pressure on the interior perimeter surface of described workpiece produces described second electro-chemical machining of groove.
9. electrochemical machiningtool according to claim 1 is characterized in that, described insulation guiding tool and described electrode body can be movable relative to each other.
10. one kind is used electrochemical machiningtool that workpiece is carried out the method for electro-chemical machining, comprising:
Carry out at least two in the and the following simultaneously:
Axial hydrodynamic on the described workpiece produces first electro-chemical machining of groove,
Radial dynamic pressure on the described workpiece produce groove second electro-chemical machining and
Be positioned at the deburring electro-chemical machining of the burr on the described workpiece.
11. method according to claim 10 is characterized in that, described electrochemical machiningtool comprises an electrode body, and described method comprises that also described electrode body in location and described workpiece are to form electrolyte passage between them.
12. method according to claim 10, it is characterized in that, this method also comprise the described axial hydrodynamic of independent execution produce in the described deburring electro-chemical machining that described first electro-chemical machining of groove, described radial dynamic pressure produce described second electro-chemical machining of groove and described burr remaining that.
13. method according to claim 10 is characterized in that, carries out described axial hydrodynamic simultaneously and produces described first electro-chemical machining of groove and the described deburring electro-chemical machining of described burr.
14. method according to claim 10 is characterized in that, carries out described axial hydrodynamic simultaneously and produces described first electro-chemical machining of groove and described second electro-chemical machining that described radial dynamic pressure produces groove.
15. method according to claim 10 is characterized in that, described workpiece comprises the cover for seat that is associated with hydrodynamic pressure bearing.
16. method according to claim 15 is characterized in that, described hydrodynamic pressure bearing is associated with Spindle Motor.
17. one kind is used for carrying out of and the following or carrying out wherein two or multinomial electrochemical machining apparatus simultaneously: axial hydrodynamic produces the electro-chemical machining of groove, radial dynamic pressure produces the electro-chemical machining of groove and is used for the electro-chemical machining of fin cutting, described axial hydrodynamic produces the pre-position of electro-chemical machining on the end face of a cover for seat of groove to carry out, described radial dynamic pressure produces first pre-position of electro-chemical machining on the interior perimeter surface of described cover for seat of groove to carry out, and the mechanical processing process that described burr is carried out separately by second pre-position on the interior perimeter surface of described cover for seat produces, and described electrochemical machining apparatus comprises:
Be used to keep the cover for seat holding device of described cover for seat;
Be arranged to carry out described one or carry out the electrode unit of two or more electro-chemical machining processes simultaneously; And
The insulation guiding tool, this insulation guiding tool is configured to:
Form the electrochemical solution of a passage with described electrode unit and described cover for seat to be used for being associated with described electro-chemical machining process, and
Determine the position of electrode with respect to described cover for seat,
Wherein said electrochemical machining apparatus is arranged to move along an axis and is produced the end face of groove side and upper surface of described cover for seat holding device one of with the axial hydrodynamic of described cover for seat with the end face of guaranteeing described insulation guiding tool under pressure and contact, and electrochemical solution flows into described passage thus.
18. electrochemical machining apparatus according to claim 17 is characterized in that, described electrode unit comprises:
Be used on the described end face of described cover for seat, carrying out the machined electrode that described axial hydrodynamic produces the electro-chemical machining of groove; And
The burr that is used to carry out the electro-chemical machining of fin cutting is removed machined electrode, and described burr is produced by described independent mechanical processing process, and described second predetermined position comprises the oil-containing portion section on the interior perimeter surface of described cover for seat.
19. electrochemical machining apparatus according to claim 17 is characterized in that, described electrode unit comprises:
Be used on the described end face of described cover for seat, carrying out first machined electrode that described axial hydrodynamic produces the electro-chemical machining of groove; And
Be used on the interior perimeter surface of described cover for seat, carrying out second machined electrode that described radial dynamic pressure produces the electro-chemical machining of groove.
20. electrochemical machining apparatus according to claim 17 is characterized in that, described electrode unit comprises:
Be used on the interior perimeter surface of described cover for seat, carrying out the machined electrode that described radial dynamic pressure produces the electro-chemical machining of groove; And
The burr that is used to carry out the electro-chemical machining of fin cutting is removed machined electrode, and described burr is produced by described independent mechanical processing process, and described second predetermined position comprises the oil-containing portion section on the interior perimeter surface of described cover for seat.
21. electrochemical machining apparatus according to claim 17 is characterized in that, described electrode unit comprises:
Be used on the described end face of described cover for seat, carrying out first machined electrode that described axial hydrodynamic produces the electro-chemical machining of groove;
Be used on the interior perimeter surface of described cover for seat, carrying out second machined electrode that described radial dynamic pressure produces the electro-chemical machining of groove; And
The burr that is used to carry out the electro-chemical machining of fin cutting is removed machined electrode, and described burr is produced by described independent mechanical processing process, and described second predetermined position comprises the oil-containing portion section on the interior perimeter surface of described cover for seat.
22. electrochemical machining apparatus according to claim 17, it is characterized in that, described insulation guiding tool comprises the salient that is used to guarantee a gap, this gap is used to carry out the course of processing that is used to form axial hydrodynamic generation groove, and described salient produces the end face of groove side with the axial hydrodynamic of described cover for seat under pressure or the upper surface of described cover for seat holding device contacts.
23. electrochemical machining apparatus according to claim 17 is characterized in that, described insulation guiding tool and described electrode unit can relatively move.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP272505/2004 | 2004-09-17 | ||
| JP2004272505 | 2004-09-17 | ||
| JP207881/2005 | 2005-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101052751A true CN101052751A (en) | 2007-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580031236 Pending CN101052751A (en) | 2004-09-17 | 2005-08-25 | Electrochemical machining tool and method for machining a product using the same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102814562A (en) * | 2012-08-27 | 2012-12-12 | 大连工业大学 | Electrochemical machining apparatus of dispersed suspended cathode |
| CN103084683A (en) * | 2011-11-02 | 2013-05-08 | 苏州长风机电科技有限公司 | Electrochemical deburring equipment and electrochemical deburring method applicable to cylinders of diesel engines |
| CN104392732A (en) * | 2013-08-01 | 2015-03-04 | 希捷科技有限公司 | Electro-chemically machining with a motor part including an electrode |
| CN104593830A (en) * | 2013-11-01 | 2015-05-06 | 无锡华臻新能源科技有限公司 | Electrochemical additive manufacturing method with measuring feedback, and apparatus thereof |
| CN106471252A (en) * | 2014-05-15 | 2017-03-01 | 贝克休斯公司 | Rotor for screw pump or the method for electrochemical machining of stator |
| CN108436206A (en) * | 2018-06-01 | 2018-08-24 | 西北工业大学 | A kind of adaptive, adjustable type combination tool electrode assembly |
| CN109570667A (en) * | 2019-01-18 | 2019-04-05 | 广西玉柴机器股份有限公司 | A kind of cylinder block electrochemical deburring device |
| CN113909594A (en) * | 2021-11-09 | 2022-01-11 | 中国航空制造技术研究院 | Electrochemical machining device and electrochemical machining method for island-shaped special-shaped boss |
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- 2005-08-25 CN CN 200580031236 patent/CN101052751A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084683A (en) * | 2011-11-02 | 2013-05-08 | 苏州长风机电科技有限公司 | Electrochemical deburring equipment and electrochemical deburring method applicable to cylinders of diesel engines |
| CN102814562A (en) * | 2012-08-27 | 2012-12-12 | 大连工业大学 | Electrochemical machining apparatus of dispersed suspended cathode |
| CN104392732A (en) * | 2013-08-01 | 2015-03-04 | 希捷科技有限公司 | Electro-chemically machining with a motor part including an electrode |
| CN104593830A (en) * | 2013-11-01 | 2015-05-06 | 无锡华臻新能源科技有限公司 | Electrochemical additive manufacturing method with measuring feedback, and apparatus thereof |
| CN106471252A (en) * | 2014-05-15 | 2017-03-01 | 贝克休斯公司 | Rotor for screw pump or the method for electrochemical machining of stator |
| CN106471252B (en) * | 2014-05-15 | 2019-10-18 | 贝克休斯公司 | For the rotor of screw pump or the method for electrochemical machining of stator |
| CN108436206A (en) * | 2018-06-01 | 2018-08-24 | 西北工业大学 | A kind of adaptive, adjustable type combination tool electrode assembly |
| CN108436206B (en) * | 2018-06-01 | 2019-07-19 | 西北工业大学 | A kind of adaptive, adjustable type combination tool electrode assembly |
| CN109570667A (en) * | 2019-01-18 | 2019-04-05 | 广西玉柴机器股份有限公司 | A kind of cylinder block electrochemical deburring device |
| CN109570667B (en) * | 2019-01-18 | 2023-08-15 | 广西玉柴机器股份有限公司 | Electrolytic deburring device for cylinder block |
| CN113909594A (en) * | 2021-11-09 | 2022-01-11 | 中国航空制造技术研究院 | Electrochemical machining device and electrochemical machining method for island-shaped special-shaped boss |
| CN113909594B (en) * | 2021-11-09 | 2022-08-09 | 中国航空制造技术研究院 | Electrochemical machining device and electrochemical machining method for island-shaped special-shaped boss |
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