CN102266989B - Special tool cathode for electrochemical machining of micro concave pits at inner hole wall surface of part - Google Patents
Special tool cathode for electrochemical machining of micro concave pits at inner hole wall surface of part Download PDFInfo
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- CN102266989B CN102266989B CN2011102246290A CN201110224629A CN102266989B CN 102266989 B CN102266989 B CN 102266989B CN 2011102246290 A CN2011102246290 A CN 2011102246290A CN 201110224629 A CN201110224629 A CN 201110224629A CN 102266989 B CN102266989 B CN 102266989B
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Abstract
The invention provides a special tool cathode for electrochemical machining of micro concave pits at an inner hole wall surface of a part. An electrical insulator of the special tool cathode is pipe-shaped and is made of elastic materials. The electrical insulator is provided with hollow hole groups for the passing-through of electrolyte. A conductive body is arranged in the electrical insulator in a penetration manner along the axial direction. A gap exists between the outer wall of the conductive body and the inner wall of the electrical insulator. A front pipe head and a back pipe head are same in structure and respectively comprise a cone-shaped shell and a conductive body fixing pipe. Each cone-shaped shell and the corresponding conductive body fixing pipe are arranged coaxially. Support spokes are arranged between the inner wall of each cone-shaped shell and the outer wall of the corresponding conductive body fixing pipe for supporting and fixing. Two ends of the conductive body penetrate through the conductive body fixing pipes of the front pipe head and the back pipe head respectively in a matching manner. Small heads of the cone-shaped shells of the front pipe head and the back pipe head are detachably embedded in the front end and the back end of the electrical insulator. The cone-shaped shells of the front pipe head and the back pipe head are closely embedded with the front end and the back end of the electrical insulator. The tool cathode in the invention can be used for increasing the production efficiency and the operability of electrochemical machining.
Description
Technical field:
The present invention relates to technical field of electrolysis processing, especially a kind of tool cathode that is used for the fine pit Electrolyzed Processing of part endoporus wall.
Background technology:
At present; Application shows; Surperficial texture such as fine pit, groove can store lubricating fluid, hold abrasive dust, reduce surface adsorption power, produce turbulent structure at the metal parts inner wall, thereby play the heat transfer property that reduces to rub, avoid surface adhesion, strengthens heat exchanger channels.At present, the surperficial texture that is of a size of several microns to hundreds of microns small pit shape successfully is applied to heat exchanger channels inwall turbulent structures such as friction surfaces such as hard disc of computer, mechanical dynamic seal, sliding bearing and preheater, condenser, heat exchanger.Yet, in processing, especially the minute yardstick scope of part endoporus wall bowl configurations, but be a manufacturing difficult problem.
At present; The processing method of the fine bowl configurations of metal parts inner wall has following several kinds: (1) self-excited vibration processing: the surface micro-pit ultrasonic machining device is contained on the planker of lathe; Processed parts with frication pair (for example cylinder sleeve) is contained on the machine tool chief axis and with certain rotating speed and rotates; Little hole ultrasonic machining device can be vertically and the horizontal direction feeding; Control the degree of depth in little hole through traverse feed, promote horn through ultrasonic transducer and apply ultrasonic vibration, rely on vibratory impulse to form separate little hole at the cylinder sleeve working surface with certain distributed rule and certain size parameter to tool heads.This method must possess the condition of related flutter of the vibration shape or the flutter of regeneration type, otherwise is difficult to realize the Steady Self vibration.Moreover, can't adopt high density, the non-cutting element head of high efficiency matrix type, working (machining) efficiency is low.(2) laser honing: this method is according to actual needs; Employing has the laser beam of particular energy density, on purpose on the workpiece work surface, processes evenly continuous, as to have given shape, angle, the degree of depth, width, density cavity, lines, groove etc.This processing method workpiece thermal stress is little, need not cooling, environmental pollution is little.Yet, needing through the thick top gem of a girdle-pendant, laser stereo lithography and smart top gem of a girdle-pendant three process, technology is loaded down with trivial details, and laser has ablation and microcosmic vaporization to cylinder jacket material, causes the variation of material property.In addition, laser honing apparatus expensive, complicated operation, maintenance difficult, little hole processing cost height.(3) Electrolyzed Processing: this method is based on metal material generation electrochemical dissolution principle under the "on" position; Utilize custom-designed tool-electrode; The control machining voltage, realize the processing of dimple structure process time; Stress and distortion can not occur, machined surface quality is high, has overcome the defective of above-mentioned two kinds of processing methods.But the tool-electrode that Electrolyzed Processing is used or the making of mask structure but are its core difficult problems.The Chinese patent CN101259549A that filed an application on September 10th, 2008 has disclosed a kind of electrolytic processing process and device of small bore diameter inner wall surface fine groove; It adopts ultraviolet light mask curing technology earlier; Solidify the insulating barrier of one deck given shape at the outer surface of conductive wire; By developer solution uncured portion is removed afterwards and formed exposed conductive layer; Utilize electroforming process at wire exposed part deposition one deck metal suitable at last, finally obtain the alternate forming tool negative electrode of insulating segment and conductive segment with thickness of insulating layer.The Chinese patent CN1943951A that on April 11st, 2007 filed an application has disclosed a kind of electrolytic processing method for ribbed deep small holes and special tool cathode, and it has produced the forming tool negative electrode through in the groove of metal tube outer surface, applying epoxide-resin glue.The common deficiency that these two kinds of methods exist is a tool-electrode process complex manufacturing process; And insulating cement and electric conductor combine firm inadequately, and tool-electrode is easy to take place the glued membrane obscission in the electrolytic process, causes electrolysis to go on; Even workpiece scraps, and practicality is not high.In addition, because surface to be machined does not adopt shielding measure, electrochemical machining process is prone to produce the dispersion corrosion phenomenon.The Chinese patent CN101491851B that announced on December 8th, 2010 has disclosed a kind of electrochemical machining process of metal parts inner wall turbulence structure; It passes through directly in part endoporus wall coating insulating glue; With the Electrolyzed Processing that does not need working position to shield to realize the fine pit of part endoporus wall, evenly apply cohesive force Electrolyzed Processing strong, high structure precision reliably at the deep hole wall and use mask but this method is extremely difficult.Above-mentioned Electrolyzed Processing with the not enough big limitations in the manufacture craft of tool-electrode its applying in industry.Therefore, develop the important realistic meaning of electrode special tool that is suitable for the fine pit Electrolyzed Processing of part endoporus wall that a kind of manufacture craft is simple, practical, the electrochemical machining process dispersion corrosion is little.
Invention
Content:
The purpose of this invention is to provide a kind of special tool cathode that is suitable for the fine pit Electrolyzed Processing of part endoporus wall.
The fine pit Electrolyzed Processing of a kind of part endoporus wall special tool cathode; Wherein: comprise electrical insulator, electric conductor, preceding tube head, back tube head; Electrical insulator in a tubular form, the outer wall specification of electrical insulator matches with part endoporus specification to be processed, the outer wall of electrical insulator and part inner hole wall to be processed are pressed close to mutually and can freely be penetrated taking-up; Electrical insulator adopts elastomeric material, and electrical insulator is provided with and is used for the hollow hole crowd that electrolyte passes through; Electric conductor is arranged in the electrical insulator vertically, has the gap between electric conductor outer wall and the electrical insulator inwall; Preceding tube head is identical with back tube head structure; Include an awl cylindrical case and an electric conductor stationary pipes; Awl cylindrical case and the coaxial setting of electric conductor stationary pipes; By supporting the spoke support fixation, the electric conductor two ends cooperate respectively in the electric conductor stationary pipes that is arranged in preceding tube head, back tube head between awl cylindrical case inwall and the electric conductor stationary pipes outer wall; The microcephaly of the awl cylindrical case of preceding tube head, back tube head removably is embedded in the forward and backward end of electrical insulator, and the awl cylindrical case of preceding tube head and back tube head and the end, front and back of electrical insulator are closely chimeric.
The fine pit Electrolyzed Processing of described part endoporus wall special tool cathode, wherein: electrical insulator is cylindrical.
The fine pit Electrolyzed Processing of described part endoporus wall special tool cathode, wherein: electric conductor is bar-shaped or tubulose.
The fine pit Electrolyzed Processing of described part endoporus wall special tool cathode, wherein: the gap between electric conductor outer wall and the electrical insulator inwall is not less than 1 millimeter.
The fine pit Electrolyzed Processing of described part endoporus wall special tool cathode, wherein: the shell of preceding tube head, back tube head adopts nylon material.
The fine pit Electrolyzed Processing of described part endoporus wall special tool cathode, wherein: the shell of preceding tube head, back tube head adopts the TVP polyester material.
The fine pit Electrolyzed Processing of described part endoporus wall special tool cathode, wherein: the shell of preceding tube head, back tube head adopts the TPEE polyester material.
The present invention will reach following technique effect after adopting technique scheme:
The fine pit Electrolyzed Processing of part endoporus wall of the present invention special tool cathode; Electrical insulator is inserted in the part endoporus to be processed; Electric conductor is inserted electrical insulator; It is chimeric that forward and backward tube head inserts the forward and backward end of electrical insulator respectively, and electric conductor embeds on the forward and backward tube head fixing in the electric conductor stationary pipes, pushes forward and backward tube head in opposite directions; Extruding force through forward and backward tube head tightly is pressed in the insulator tube wall on the inner hole wall of workpiece; Electrolyte flows out from the gap between electrical insulator and the workpiece hole wall when preventing Electrolyzed Processing, and electrolyte feeds through the shell of preceding tube head and the supporting spokes interspace between the electric conductor, and electrolyte is shell and the outflow of the supporting spokes interspace between the electric conductor through the back tube head again.
As above, the characteristics of technical scheme of the present invention are following:
(1) the present invention utilizes the elasticity electrical insulator to receive the pressure in opposite directions of forward and backward tube head and adds electrolyte inside pressure effect in man-hour and the characteristic that swells; The zone that part bore wall to be processed need not be processed shields; Therefore do not need loaded down with trivial details operations such as gluing, exposure; Manufacturing process is simple; And the fine pit Electrolyzed Processing of part endoporus wall of the present invention special tool cathode is reusable, has reduced part endoporus wall fine pit Electrolyzed Processing tool cathode production cost and cycle, has improved working (machining) efficiency;
(2) shape through controlling hollow hole crowd on the fine pit Electrolyzed Processing of the part endoporus wall of the present invention special tool cathode with arrange mode, can electrolysis go out complicated shape and the multiple fine pit of arranging mode;
(3) hole depth is unrestricted in the machinable part of the present invention, can be used for the fine pit Electrolyzed Processing of wall of deep hole.
To sum up analyze; The fine pit Electrolyzed Processing of part endoporus wall of the present invention special tool cathode is made simple, reusable; The processing cost and the cycle of the fine pit Electrolyzed Processing of part endoporus wall tool cathode have been reduced; Improve the production efficiency and the operability of the fine pit Electrolyzed Processing of part endoporus wall, more helped realizing the suitability for industrialized production of the fine pit Electrolyzed Processing of part endoporus wall.
Description of drawings:
Fig. 1 is the structure chart with broken section of the fine pit Electrolyzed Processing of part endoporus wall of the present invention special tool cathode;
Fig. 2 is the fine pit Electrolyzed Processing of part endoporus wall of the present invention special tool cathode adds man-hour to the part endoporus an assembling schematic diagram.
Label title among the figure: 1 electrical insulator, 2 electric conductors, 3 wheel hubs, 4 spokes, tube heads before 5,6 back tube heads, 7 parts processed.
The specific embodiment:
The fine pit Electrolyzed Processing of a kind of part endoporus wall of the present invention special tool cathode; Like Fig. 1, comprise electrical insulator 1, electric conductor 2, preceding tube head 5, back tube head 6, electrical insulator 1 is in a tubular form; The outer wall specification of electrical insulator 1 matches with part endoporus specification to be processed; The outer wall of electrical insulator 1 is pressed close to mutually with part inner hole wall to be processed and can freely be penetrated taking-up, and electrical insulator 1 adopts elastomeric material, and electrical insulator 1 is provided with and is used for the hollow hole crowd that electrolyte passes through; Electric conductor 2 is arranged in the electrical insulator 1 vertically, has the gap between electric conductor 2 outer walls and electrical insulator 1 inwall; Preceding tube head 5 is identical with back tube head 6 structures; Include an awl cylindrical case and an electric conductor stationary pipes 3; Electric conductor stationary pipes 3 also can be described as wheel hub; Awl cylindrical case and the 3 coaxial settings of electric conductor stationary pipes, by supporting spoke 4 support fixation, electric conductor 2 two ends cooperate in the electric conductor stationary pipes 3 that is arranged in preceding tube head 5, back tube head 6 detachable fixing respectively between awl cylindrical case inwall and electric conductor stationary pipes 3 outer walls; The microcephaly of the awl cylindrical case of preceding tube head 5, back tube head 6 removably is embedded in the forward and backward end of electrical insulator 1, and the awl cylindrical case of preceding tube head 5 and back tube head 6 and the forward and backward end of electrical insulator 1 are closely chimeric.
In the present embodiment, electrical insulator 1 is cylindrical, and electric conductor 2 is bar-shaped or tubulose, and the gap between electric conductor 2 outer walls and electrical insulator 1 inwall is not less than 1 millimeter; The shell employing nylon material of preceding tube head 5, back tube head 6 or TVP (polyurethane elastomer), TPEE polyester materials such as (thermoplastic polyester elastomers).
Like Fig. 2, being 5mm at internal diameter, being that the processing diameter is that 0.2mm, pitch of holes are that the fine pit of 0.6mm is an example on the stainless steel part endoporus wall of 20mm deeply, technical scheme of the present invention is done further detailed job description:
According to the requirement of workpiece to be processed 7, to produce external diameter be 4.9mm, run through group bore dia is that 0.18mm, pitch of holes are that 0.6mm, pipe thickness are 0.1mm, longly are the tubular polyimide electrical insulator 1 of 22mm.
With electrical insulator 1 and diameter is that 3mm, long stainless steel tube electric conductor 2 for 30mm cooperate in the hole of inserting workpiece to be processed 7.
Being 1:10, big footpath with tapering is 5.3mm, high for the preceding tube head 5 of 8mm and back tube head 6 place the two ends in workpiece 7 holes respectively, and the outer wall that makes forward and backward tube head 5,6 overlaps with the forward and backward inner tubal wall of insulator 1 respectively, front and back tapered tube head 5 and 6 wheel hub 3 and electric conductor 2 coaxial cross-under.
Push forward and backward tube head 5,6 in opposite directions, tightly be pressed in electrical insulator 1 tube wall on the hole wall of workpiece 7, and then electrolyte flows out from the gap between electrical insulator 1 and workpiece 7 hole walls when preventing Electrolyzed Processing with extruding force through forward and backward tube head 5,6.
Spoke 4 gaps through preceding tube head 5 feed electrolyte, and regulate the electrolyte rate of discharge that tube head 6 flows out from the back, to regulate the inside and outside differential pressure of electrical insulator 1 tube wall; When the tube wall internal pressure of electrical insulator 1 during greater than its external pressure, the continuous elasticity of the tube wall of electrical insulator 1 swells, and fits tightly up to the hole wall with part 7.
Energized just can utilize this tool-electrode to carry out Electrolyzed Processing.
Claims (7)
1. the fine pit Electrolyzed Processing of part endoporus wall special tool cathode; It is characterized in that: comprise electrical insulator, electric conductor, preceding tube head, back tube head; Electrical insulator in a tubular form, the outer wall specification of electrical insulator matches with part endoporus specification to be processed, the outer wall of electrical insulator and part inner hole wall to be processed are pressed close to mutually and can freely be penetrated taking-up; Electrical insulator adopts elastomeric material, and electrical insulator is provided with and is used for the hollow hole crowd that electrolyte passes through; Electric conductor is arranged in the electrical insulator vertically, has the gap between electric conductor outer wall and the electrical insulator inwall; Preceding tube head is identical with back tube head structure; Include an awl cylindrical case and an electric conductor stationary pipes; Awl cylindrical case and the coaxial setting of electric conductor stationary pipes; By supporting the spoke support fixation, the electric conductor two ends cooperate respectively in the electric conductor stationary pipes that is arranged in preceding tube head, back tube head between awl cylindrical case inwall and the electric conductor stationary pipes outer wall; The microcephaly of the awl cylindrical case of preceding tube head, back tube head removably is embedded in the forward and backward end of electrical insulator, and the awl cylindrical case of preceding tube head and back tube head and the end, front and back of electrical insulator are closely chimeric.
2. the fine pit Electrolyzed Processing of part endoporus wall as claimed in claim 1 special tool cathode, it is characterized in that: electrical insulator is cylindrical.
3. the fine pit Electrolyzed Processing of part endoporus wall as claimed in claim 2 special tool cathode, it is characterized in that: electric conductor is bar-shaped or tubulose.
4. the fine pit Electrolyzed Processing of part endoporus wall as claimed in claim 3 special tool cathode, it is characterized in that: the gap between electric conductor outer wall and the electrical insulator inwall is not less than 1 millimeter.
5. like claim 1 or the fine pit Electrolyzed Processing of 2 or 3 or 4 described part endoporus walls special tool cathode, it is characterized in that: the shell of preceding tube head, back tube head adopts nylon material.
6. like claim 1 or the fine pit Electrolyzed Processing of 2 or 3 or 4 described part endoporus walls special tool cathode, it is characterized in that: the shell of preceding tube head, back tube head adopts the TVP polyester material.
7. like claim 1 or the fine pit Electrolyzed Processing of 2 or 3 or 4 described part endoporus walls special tool cathode, it is characterized in that: the shell of preceding tube head, back tube head adopts the TPEE polyester material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102246290A CN102266989B (en) | 2011-08-08 | 2011-08-08 | Special tool cathode for electrochemical machining of micro concave pits at inner hole wall surface of part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102246290A CN102266989B (en) | 2011-08-08 | 2011-08-08 | Special tool cathode for electrochemical machining of micro concave pits at inner hole wall surface of part |
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| CN102266989A CN102266989A (en) | 2011-12-07 |
| CN102266989B true CN102266989B (en) | 2012-08-01 |
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| CN2011102246290A Expired - Fee Related CN102266989B (en) | 2011-08-08 | 2011-08-08 | Special tool cathode for electrochemical machining of micro concave pits at inner hole wall surface of part |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106346094B (en) * | 2016-09-20 | 2018-08-24 | 河南理工大学 | A kind of device for the anti-clip slot of Electrolyzed Processing super thin metal cutting sheet |
| CN110842307B (en) * | 2019-11-22 | 2020-07-17 | 合肥工业大学 | Electrochemical machining tool for complex inner wall structure with poor accessibility |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1696197A1 (en) * | 1989-09-24 | 1991-12-07 | Тульский Политехнический Институт | Method of electrochemical formation of regular relief |
| DE19854793A1 (en) * | 1998-11-27 | 2000-06-08 | Univ Stuttgart Inst Fuer Ferti | Electrodes for electrochemical machining of metallic part, have metal body coated with ceramic or polymer |
| JP2002307249A (en) * | 2001-04-10 | 2002-10-23 | Mitsubishi Heavy Ind Ltd | Hole machining method and hole machining electrode |
| CN1511668A (en) * | 2002-12-27 | 2004-07-14 | ͨ�õ�����˾ | Electric working using perforating electrode |
| CN1943951A (en) * | 2006-10-20 | 2007-04-11 | 南京航空航天大学 | Electrolytic processing method for ribbed deep small holes and special tool cathode |
| CN201168839Y (en) * | 2008-02-21 | 2008-12-24 | 常州工学院 | Composite cathode for numerical control electrolysis machine tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07285027A (en) * | 1994-04-15 | 1995-10-31 | Tokin Corp | Electrolytic polishing method |
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- 2011-08-08 CN CN2011102246290A patent/CN102266989B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1696197A1 (en) * | 1989-09-24 | 1991-12-07 | Тульский Политехнический Институт | Method of electrochemical formation of regular relief |
| DE19854793A1 (en) * | 1998-11-27 | 2000-06-08 | Univ Stuttgart Inst Fuer Ferti | Electrodes for electrochemical machining of metallic part, have metal body coated with ceramic or polymer |
| JP2002307249A (en) * | 2001-04-10 | 2002-10-23 | Mitsubishi Heavy Ind Ltd | Hole machining method and hole machining electrode |
| CN1511668A (en) * | 2002-12-27 | 2004-07-14 | ͨ�õ�����˾ | Electric working using perforating electrode |
| CN1943951A (en) * | 2006-10-20 | 2007-04-11 | 南京航空航天大学 | Electrolytic processing method for ribbed deep small holes and special tool cathode |
| CN201168839Y (en) * | 2008-02-21 | 2008-12-24 | 常州工学院 | Composite cathode for numerical control electrolysis machine tool |
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