CN107225299A - Two-tube collapsible tool negative electrode and its electrolysis milling combined machining method - Google Patents
Two-tube collapsible tool negative electrode and its electrolysis milling combined machining method Download PDFInfo
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- CN107225299A CN107225299A CN201710305002.5A CN201710305002A CN107225299A CN 107225299 A CN107225299 A CN 107225299A CN 201710305002 A CN201710305002 A CN 201710305002A CN 107225299 A CN107225299 A CN 107225299A
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- outer tube
- tube
- inner tube
- hole
- fluid hole
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Classifications
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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
- B23H3/04—Electrodes specially adapted therefor or their manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The present invention relates to a kind of two-tube collapsible tool negative electrode and its electrolysis milling combined machining method, belong to electrochemical grinding Compound Machining field.Two-tube collapsible tool negative electrode proposed by the present invention includes inner tube, outer tube, rubber seal and bolt.Wherein, outer tube fluid hole diameter is more than inner tube fluid hole diameter and centerline hole is overlapped, inner tube length is more than outer length of tube, diamond abrasive grain layer is electroplate with outer tube, inner tube is positioned with outer tube by inner tube positioning boss, rubber seal is located at the lower surface that inner tube connects boss, connects the screwed hole on boss using bolt connection outer tube pilot hole and inner tube and fastens inner and outer pipe.During processing, electrolyte is flowed into from interior pipe through-hole, and flowing to outer tube through inner tube liquid outlet goes out night hole, then is sprayed onto the finished surface of workpiece.The slightly solubility processing product flowed back in pole clearance enters in the ring-shaped chamber between inner and outer pipe through outer tube fluid hole, can be effectively improved phenomenon of the processing product accumulation in fluid hole.When diamond abrasive grain layer serious wear, outer tube only need to be changed.The present invention is remarkably improved the processing stability and processing efficiency of electrolysis milling Compound Machining.
Description
Technical field
The present invention relates to a kind of two-tube collapsible tool negative electrode and its electrolysis milling combined machining method, belong to electrochemical grinding
Compound Machining field.
Background technology
To mitigate construction weight, reducing number of parts, raising engine thrust-weight ratio, integrated member is more and more used
In contemporary aircraft, such as integral wheel, integral casing, overall diffuser etc..Titanium alloy, height are used these integrated members more
The hard-cutting materials such as temperature alloy, and size is big, feature is complicated, structure is frivolous, and ratio is removed with higher material.For example, China
Aircraft titanium alloy edge strip part, will process muscle thickness 3mm, web thickness on 1300 × 500 × 90mm of size blank
3 ~ 6mm edge strip class part, its roughing material removal amount reaches about 90%.Therefore, how the economic difficult cutting alloy of realization
Efficient removal, be still the problem that modern manufacturing industry faces.
At present, for the integrated member of the hard-cutting materials such as machining titanium alloy, high temperature alloy, conventional manufacturing process has number
Control milling, electrical discharge machining, Electrolyzed Processing.However, because the thermal conductivity factor low and high temperature intensity of these materials is high, using numerical control
Cutting force is big during Milling Process, cutting temperature is high so that tool wear is fast, processing hardening is serious, workpiece residual stress is big, causes
Processing efficiency is low, high processing costs, workpiece are yielding.When using electrical spark working man-hour, not only processing efficiency is still limited, and
Workpiece machining surface easily forms recast layer, heat affected area and micro-crack, can influence the fatigue strength and working life of integrated member.
Although Electrolyzed Processing has the advantages that tool cathode is lossless, high in machining efficiency, it is unstressed to process, in anodic dissolution processes
In, workpiece surface easily forms the passivating film of higher resistive, compact structure, can hinder the progress of cell reaction.Particularly work as electrolysis
Machining titanium alloy etc. from passivity stronger material when, generally the active electrolyte from chloride ion-containing etc. goes to destroy passivating film, knot
Fruit causes serious dispersion corrosion again, causes machining accuracy relatively low.
To improve the defect of above-mentioned manufacturing process, electrolysis milling Combined Machining Technology has been suggested, that is, uses bar-shaped mill
Head is processed motion control in the way of similar to vertical numerical control milling, dissolved using Anodic as tool cathode
The material removal process of workpiece is realized with the Compound Machining mechanism of mechanical grinding.Electrolysis milling Compound Machining there is high efficiency, it is low
The advantages of cost, high flexibility, on the difficult cutting alloy such as nickel base superalloy, titanium alloy processing type face, die cavity, thin-walled,
The structures such as boss, this manufacturing process has obvious advantage.At present, being further introduced into interior injection feed liquid way, electricity
Solution liquid can be directly injected to by bistrique endoporus in processing gap, and takes away processing product rapidly.As a result, single feed is removed
Material thickness be significantly improved, be more beneficial for high efficiency, the big surplus of the difficult cutting alloy of realization of low cost and remove.
For the roughing of integrated member, to pursue high material removing rate, generally using high feed speed.However,
Found in the electrolysis milling Compound Machining using interior hydrojet tool cathode, have little time a small amount of slightly solubility processing product meeting of discharge
Flow back and be attached in tool cathode fluid hole.With the lasting progress of processing, the processing of aggregation is produced in tool cathode fluid hole
Thing gradually increases, and the actual logical liquid level product of fluid hole is gradually reduced, and the flow for spraying electrolyte is gradually reduced so that pole clearance
Electrolyte inside electrical conductivity is reduced, and causes Anodic corrosive power to weaken, i.e. anode material dissolution velocity slows down.As a result, exist
Under constant feed speed processing, stable balance machining state was broken originally, started to frequently occur spark phenomenon, processing becomes
Obtain and no longer stablize, and cause cutter and workpiece surface damage, or even occur short circuit, finally force processing stopping.The problem is serious
Constrain the further genralrlization and commercial Application of electrolysis milling Combined Machining Technology.
The content of the invention
The invention reside in view of the above-mentioned problems, propose that a kind of two-tube collapsible tool negative electrode and its electrolysis milling are combined and added
Work method, improves processing stability and processing efficiency of the technology when big surplus is removed.
A kind of two-tube collapsible tool negative electrode, it is characterised in that：Including inner tube, outer tube, rubber seal, bolt；
The outer tube hub has outer tube blind hole, and lower end outside is electroplate with diamond abrasive grain layer, the diamond abrasive grain layer height of plating
Equal to the working depth needed for processing；
The length of said inner tube is more than the length of the outer tube, and interior tube hub has on the outside of the interior pipe through-hole run through, interior pipe end and had
There is the inner tube connection boss of ring-type in outside in the middle part of the inner tube positioning boss of ring-type, inner tube；
The external diameter of said inner tube positioning boss and inner tube connection boss is equal to the internal diameter of the outer tube；Said inner tube is located at outer tube
In；The lower surface of said inner tube positioning boss is contacted with the outer tube blind hole bottom surface；
The side wall of said inner tube is provided with some inner tube fluid holes communicated with its interior pipe through-hole, and the side wall of the outer tube is provided with some
The outer tube fluid hole communicated with its outer tube blind hole；
Be provided with some Internal Pipe Thread holes on the periphery of said inner tube connection boss, be provided with the outside of the upper end of the outer tube it is some with
The corresponding outer tube pilot hole in above-mentioned Internal Pipe Thread hole, the i.e. center line of Internal Pipe Thread hole and outer tube pilot hole are overlapped and quantity phase
Deng；The bolt passes through the outer tube pilot hole and connected and is anchored in said inner tube screwed hole；The rubber seal is enclosed on
On the side wall of said inner tube, the lower section of boss is connected positioned at said inner tube.
The two-tube collapsible tool negative electrode, it is characterised in that：The outer tube fluid hole and inner tube fluid hole center line weight
Close and quantity is equal；And the diameter of inner tube fluid hole is less than the diameter of the outer tube fluid hole.
The two-tube collapsible tool negative electrode, it is characterised in that：The upper edge of said inner tube positioning boss goes out with the outer tube
The Down Highway of fluid apertures is concordant.
The two-tube collapsible tool negative electrode, it is characterised in that：Said inner tube material is stainless steel.
Utilize the electrolysis milling combined machining method of described two-tube collapsible tool negative electrode, it is characterised in that including following
Process：
The inner tube upper end of the tool cathode is vertically clamped in machine tool chief axis end, and connects power cathode；Electrolyte is first along interior
Pipe through-hole entering tool negative electrode, outer tube fluid hole is flowed to through inner tube fluid hole, then is sprayed onto the finished surface of workpiece, at the same inner tube and
Ring-shaped chamber between outer tube is also filled with electrolyte；
During processing, diamond abrasive grain layer region is the working region of tool cathode on outer tube；Turn on the power, operating voltage be set,
Tool cathode rotates along direction, workpiece feeding, workpiece material quilt in the case where Anodic corrodes the collective effect with mechanical grinding
Remove, wherein most slightly solubility processing product takes machining area, a small amount of indissoluble out of by the electrolyte sprayed from outer tube fluid hole
Property processing product flowed back into along outer tube fluid hole in the annular volume between inner tube and outer tube, it is to avoid slightly solubility process product
It is gathered in outer tube fluid hole；
When outer tube needs to change, the kinetic control system withdrawing of lathe is first passed through, turning tool dismounting bolt is reused and removes
Old outer tube, and its fluid hole is positioned using new outer tube pilot hole and Internal Pipe Thread hole, then pass through fastening using turning tool
Bolt connection inner and outer pipe.
The present invention has advantages below：
1st, diameter of the diameter more than inner tube fluid hole of the outer tube fluid hole of the collapsible tool negative electrode of the invention provided, and interior,
There is ring-shaped chamber between outer tube.Therefore be back in process in outer tube fluid hole slightly solubility processing product may proceed into
Enter in ring-shaped chamber, it is to avoid continue to build up in inner tube fluid hole.Compared with hydrojet tool cathode in conventional integral type, this hair
The bright phenomenon for being effectively improved flow of electrolyte decline caused by fluid hole internal cause slightly solubility processing product accumulation, so as to improve
Difficult cutting alloy processing stability when big surplus is removed.
2nd, the outer length of tube of collapsible tool negative electrode that the present invention is provided is less than inner tube and only outer tube hub has blind hole, and normal
Hydrojet tool cathode is compared in the integral type of rule, and the aspect ratio of institute's processing blind hole is significantly reduced.Further, since inner tube uses corrosion resistant
The stainless steel material of erosion, and inner and outer pipe is bolted, therefore when diamond abrasive grain layer loss is serious, need to only change outer
Pipe, inner tube can be with Reusability.These features advantageously reduce the manufacturing cost of tool cathode.
3rd, the Internal Pipe Thread hole of collapsible tool negative electrode that the present invention is provided not only acted as with outer tube pilot hole be connected it is interior,
The effect of outer tube, can also be respectively used to process positioning when inner tube fluid hole, outer tube fluid hole, can effectively ensure that in after assembling
Pipe fluid hole is overlapped with the centerline hole of outer tube fluid hole.Meanwhile, inner tube positioning boss and inner tube connection boss are filled in inner and outer pipe
Positioning action is also played during matching somebody with somebody, and the use of rubber seal then improves the sealing property of assembling.These design tables
Understand that the present invention has good reliability and feasibility
4th, the collapsible tool negative electrode that provides of the present invention can be designed according to specific process requirements suitable outer tube external diameter and wall thickness,
Diameter and number of fluid hole etc. on inner tube external diameter and wall thickness and inner and outer pipes, with good applicability, are easy to promote and answer
With.
Brief description of the drawings
The two-tube collapsible tool negative electrode schematic diagrames of Fig. 1；
Fig. 2 inner tube matrix schematic diagrames；
Fig. 3 outer tube matrix schematic diagrames；
The two-tube collapsible tool catholyte milling Compound Machining principle schematics of Fig. 4；
Label title in figure：1st, inner tube；2nd, outer tube；3rd, rubber seal；4th, bolt；5th, diamond abrasive grain layer；6th, Internal Pipe Thread
Hole；7th, inner tube fluid hole；8th, interior pipe through-hole；9th, inner tube positioning boss；10th, inner tube connection boss；11st, outer tube blind hole；12nd, outer tube
Pilot hole；13rd, outer tube fluid hole；14th, electrolyte flow direction；15th, tool cathode direction of rotation；16th, slightly solubility processing product；
17th, workpiece；18th, workpiece direction of feed；19th, power supply.
Embodiment
With reference to specific accompanying drawing, the present invention is described in further detail.
As shown in Fig. 1 ~ 3, a kind of two-tube collapsible tool negative electrode, including inner tube 1, outer tube 2, rubber seal 3 and bolt
4, diamond abrasive grain layer 5 is plated on the outside of outer tube 2.There is interior pipe through-hole 8 at the center of inner tube 1, and side wall is provided with some logical with inner tube
The inner tube fluid hole 7 that hole 8 is communicated, the distal end faces edge of inner tube 1 is provided with the inner tube positioning boss 9 of ring-type upwards, and the middle part of inner tube 1 is outer
Inner tube of the side provided with ring-type connects boss 10 and is provided with some Internal Pipe Thread holes 6 on inner tube connection boss 10.The center of outer tube 2
There is outer tube blind hole 11, side wall is provided with some outer tube fluid holes 13 and outer tube pilot hole 12, and the internal diameter of outer tube 2 is positioned equal to inner tube
Boss 9 and inner tube connect the external diameter of boss 10, the vertical range between the Down Highway of outer tube fluid hole 13 and the bottom surface of outer tube blind hole 11
Equal to the height of inner tube positioning boss 9.Positioned using the first Internal Pipe Thread hole 6 processed on inner tube positioning boss 9 in remaining
Pipe thread hole 6 and inner tube fluid hole 7, similarly, remaining outer tube are positioned by the first outer tube pilot hole 12 processed on outer tube 2
Pilot hole 12 and outer tube fluid hole 13.
When assembling the tool cathode, rubber seal 3 is enclosed on to the inner tube 1 that the lower section of boss 10 is connected positioned at inner tube first
On the wall of side；Secondly inner tube 1 is fitted into outer tube 2, the lower surface of inner tube positioning boss 9 is contacted with the bottom surface of outer tube blind hole 11, inner tube
The side wall of positioning boss 9 is contacted with the side wall of outer tube blind hole 11, then makes the Internal Pipe Thread hole 6 of first processing and outer tube pilot hole 12 same
Led on the heart, the inner tube positioning boss 9 after positioning twice along, Internal Pipe Thread hole 6 concordant with the Down Highway of outer tube fluid hole 13 with outer tube
To the centerline hole in hole 12 is overlapped, inner tube fluid hole 7 is overlapped with the centerline hole of outer tube fluid hole 13；Finally use turning tool
By bolt 4 is through outer tube pilot hole 12 and connects in fastening and Internal Pipe Thread hole 6, you can complete assembling
As shown in figure 4, carrying out electrolysis milling Compound Machining using the two-tube collapsible tool negative electrode shown in Fig. 1, its method is main
Comprise the following steps：
Step 1, the vertical clamping in upper end of the inner tube 1 of the tool cathode in machine tool chief axis end and connected into the negative pole of power supply 19,
Workpiece 17 after clamping is connected into the positive pole of power supply 19 to complete to knife, the outer tube 2 of the tool cathode is navigated to initial manufacture position；
Step 2, setting electrolyte operating pressure and temperature, electrolyte enter the instrument along flow direction 14 from interior pipe through-hole 8
Negative electrode, is sprayed onto on the work surface of workpiece 17 by inner tube fluid hole 7 and outer tube fluid hole 13, tool cathode inner tube 1 and outer
Ring-shaped chamber between pipe 2 is also filled with electrolyte；
Step 3, turn on the power 19, operating voltage is set, and tool cathode is rotated along direction 15, and workpiece 17 is fed along direction 18, work
The material of part 17 is removed in the case where Anodic corrodes the collective effect with mechanical grinding, wherein most slightly solubility processing product
16 take machining area out of by the electrolyte sprayed from outer tube fluid hole 13, and a small amount of slightly solubility processes product 16 along outer tube fluid hole
13 flow back into the annular volume between inner tube 1 and outer tube 2, assemble outside so as to effectively improve slightly solubility processing product 16
Phenomenon in pipe fluid hole 13, improves the processing stability and processing efficiency when big surplus is removed.
Step 4, when needing to change outer tube, stop processing, withdrawing, using turning tool demounting bolt 4 and remove old
Outer tube 2, new outer tube 2 is enclosed on the outside of inner tube 1, Internal Pipe Thread hole 6 is positioned at by outer tube pilot hole 12, reuse rotation
Bolt 4 is passed through outer tube pilot hole 12 and connected and is fastened in Internal Pipe Thread hole 6 by instrument, is then followed by since step 1, is continued
It is processed, until process finishing.
Claims (5)
1. a kind of two-tube collapsible tool negative electrode, it is characterised in that：
Including inner tube（1）, outer tube（2）, rubber seal（3）, bolt（4）；
The outer tube（2）There is outer tube blind hole at center（11）, lower end outside be electroplate with diamond abrasive grain layer（5）, the diamond of plating
Abrasive grain layer（5）Highly it is equal to the working depth needed for processing；
Said inner tube（1）Length be more than the outer tube（2）Length, interior tube hub has the interior pipe through-hole run through（8）, inner tube end
There is the inner tube positioning boss of ring-type in end outside（9）, there is the inner tube connection boss of ring-type in inner tube middle part outside（10）；
Said inner tube positioning boss（9）Boss is connected with inner tube（10）External diameter be equal to the outer tube（2）Internal diameter；In described
Pipe is located in outer tube；Said inner tube positioning boss（9）Lower surface and the outer tube blind hole（11）Bottom surface is contacted；
Said inner tube（1）Side wall be provided with it is some with its interior pipe through-hole（8）The inner tube fluid hole communicated（7）, the outer tube（2）'s
Side wall is provided with some and its outer tube blind hole（11）The outer tube fluid hole communicated（13）；
Said inner tube connects boss（10）Periphery on be provided with some Internal Pipe Thread holes（6）, the outer tube（2）Upper end on the outside of
It is provided with some and above-mentioned Internal Pipe Thread hole（6）Corresponding outer tube pilot hole（12）, i.e. Internal Pipe Thread hole（6）With outer tube pilot hole
（12）Center line overlap and quantity is equal；The bolt（4）Through the outer tube pilot hole（12）And connect be anchored on it is described
Internal Pipe Thread hole（6）It is interior；The rubber seal（3）It is enclosed on said inner tube（1）Side wall on, positioned at said inner tube connect boss
（10）Lower section.
2. two-tube collapsible tool negative electrode according to claim 1, it is characterised in that：The outer tube fluid hole（13）With it is interior
Pipe fluid hole（7）Center line is overlapped and quantity is equal；And inner tube fluid hole（7）Diameter be less than the outer tube fluid hole（13）'s
Diameter.
3. two-tube collapsible tool negative electrode according to claim 1, it is characterised in that：Said inner tube positioning boss（9）'s
Upper edge and the outer tube fluid hole（13）Down Highway it is concordant.
4. two-tube collapsible tool negative electrode according to claim 1, it is characterised in that：Said inner tube material（1）To be stainless
Steel.
5. utilize the electrolysis milling combined machining method of the two-tube collapsible tool negative electrode described in claim 1, it is characterised in that
Including procedure below：
By the inner tube of the tool cathode（1）Upper end is vertically clamped in machine tool chief axis end, and connects power supply（19）Negative pole；Electrolyte
First along interior pipe through-hole（8）Entering tool negative electrode, through inner tube fluid hole（7）Flow to outer tube fluid hole（13）, then it is sprayed onto workpiece（17）
Finished surface, while inner tube（1）And outer tube（2）Between ring-shaped chamber be also filled with electrolyte；
During processing, diamond abrasive grain layer on outer tube（5）Region is the working region of tool cathode；Turn on the power（19）, work is set
Make voltage, tool cathode is along direction（15）Rotation, workpiece feeding, workpiece material corrodes in Anodic and mechanical grinding is total to
It is removed under same-action, wherein most slightly solubility processing product（16）By from outer tube fluid hole（13）The electrolyte of ejection is taken out of
Machining area, a small amount of slightly solubility processing product is flowed back into the annular volume between inner tube and outer tube along outer tube fluid hole,
Slightly solubility is avoided to process product accumulation in outer tube fluid hole；
Work as outer tube（2）When needing to change, the kinetic control system withdrawing of lathe is first passed through, turning tool is reused and removes bolt
（4）Remove old outer tube（2）, and utilize new outer tube pilot hole（12）With Internal Pipe Thread hole（6）Its fluid hole is positioned, is then used
Turning tool passes through fastening bolt（4）Connect inner and outer pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710305002.5A CN107225299B (en) | 2017-05-03 | 2017-05-03 | Two-tube collapsible tool cathode and its electrolysis milling combined machining method |
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|---|---|---|---|
| CN201710305002.5A CN107225299B (en) | 2017-05-03 | 2017-05-03 | Two-tube collapsible tool cathode and its electrolysis milling combined machining method |
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| CN107225299B CN107225299B (en) | 2018-11-09 |
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Cited By (5)
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| CN108480804A (en) * | 2018-05-30 | 2018-09-04 | 西安工业大学 | Small size inner wall annular groove Electrolyzed Processing cathode and its application method |
| CN108672854A (en) * | 2018-05-24 | 2018-10-19 | 常州工学院 | A kind of special-shaped blind hole rotating cathode electrolytic machining device |
| CN109226914A (en) * | 2018-10-23 | 2019-01-18 | 常州工学院 | A kind of free form surface type chamber cathode for electrochemical machining |
| CN112091338A (en) * | 2020-08-26 | 2020-12-18 | 南京航空航天大学 | Combined type electrochemical machining tool cathode and method for improving flatness of machined bottom surface |
| CN112222545A (en) * | 2020-09-29 | 2021-01-15 | 扬州大学 | Electrochemical machining switching device for inner cavity of revolving body and design method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112091338A (en) * | 2020-08-26 | 2020-12-18 | 南京航空航天大学 | Combined type electrochemical machining tool cathode and method for improving flatness of machined bottom surface |
| CN112222545A (en) * | 2020-09-29 | 2021-01-15 | 扬州大学 | Electrochemical machining switching device for inner cavity of revolving body and design method thereof |
| CN112222545B (en) * | 2020-09-29 | 2023-11-10 | 扬州大学 | Electrolytic machining switching device for cavity in rotating body and design method thereof |
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| Publication number | Publication date |
|---|---|
| CN107225299B (en) | 2018-11-09 |
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