CN103084682B - Method of liquid beam jet flows electrolyzing and processing dimples - Google Patents
Method of liquid beam jet flows electrolyzing and processing dimples Download PDFInfo
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- CN103084682B CN103084682B CN201310015000.4A CN201310015000A CN103084682B CN 103084682 B CN103084682 B CN 103084682B CN 201310015000 A CN201310015000 A CN 201310015000A CN 103084682 B CN103084682 B CN 103084682B
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Abstract
The invention discloses a method of liquid beam jet flows electrolyzing and processing dimples. Sizes of the dimples are controlled by adjusting diameter sizes of liquid beams of jetted electrolytes and jetted time, numbers of the dimples are controlled through numbers of jets, and processing speed is controlled by controlling the distance between a jet electrode and a surface which is waiting for being processed. Operation is simple, processing accuracy and processing efficiency are high, application range is extensive, shapes of processing surfaces are not restrained, processing links are fewer, and process cost is low. Meanwhile, light liquid state electric insulation mediums are used to be shield masks, adaptability is good, being tightly attached on the processed surface, non-processing parts of the surface which is waiting for being processed are protected to be easy to recover and revise, stray corrosion effects around processed areas are weakened effectively, locality of dimple processing and thin size processing ability are improved, and processing accuracy is high.
Description
Technical field
The present invention relates to the method in the micro-hole of a kind of Electrolyzed Processing, particularly relate to the method in the micro-hole of a kind of liquid beam stream Electrolyzed Processing.
Background technology
In many brake friction pairs, working surface is in relative motion and interactional state, therefore, certainly exists friction and wear phenomenon, and they are work mechanism energy losses, efficiency reduces, friction pair lost efficacy, one of the key factor of the lost of life.Research shows, the surface texture with micro-pit array can reduce fretting wear effectively.And the size and shape in micro-hole directly affects the form that it stores lubricating oil, and then affect lubricant effect and the serviceability of friction pair.The surface characteristic in micro-hole and geometric properties and processing method closely related.
Common micro-pit array-processing method has: self-excited vibration processing method, spark erosion machining, digital control laser honing method, fine Ultrasonic machining method, Electrolyzed Processing method etc.Wherein, because have, instrument in process does not directly contact with workpiece Electrolyzed Processing, surface of the work high without tool electrode loss, working (machining) efficiency can not produce the advantages such as machining stress, distortion and heat affected area, one of important technical of the fine array structures such as processing micro-hole, micropore, very promising.
Micro-pit array method at present based on Electrolyzed Processing principle mainly contains following several:
1. mask Electrolyzed Processing, after carrying out electrochemical corrosion, obtains required microcellular structure array at workpiece work surface by the region defined patterned mask.Because the method processes required mask at every turn, complex operation, working (machining) efficiency is low, and process costs is high.
2. group act on sets formula processing, adopts micro-electrode array to carry out piecemeal processing, to obtain micro-pit array.Because the method needs the conduction micro-electrode array of high-quality big L/D ratio, electrode manufacture difficulty is very big, and the cycle is long, and cost is high; And the method machining accuracy and uniformity wayward, be not suitable for and carry out micro-pits machining on curved surface.
Summary of the invention
The object of this invention is to provide the method in the micro-hole of a kind of liquid beam stream Electrolyzed Processing, the shortcomings such as processing link is complicated, process costs is high, machining accuracy is on the low side can be overcome in existing micro-pit array-processing method, have simple to operate, the scope of application is wider, machining accuracy and working (machining) efficiency is high, process costs is low advantage.
The present invention adopts following technical proposals:
The method in the micro-hole of liquid beam stream Electrolyzed Processing, comprises the following steps
A: workpiece is placed in electrolyte, makes workpiece to be processed peak protrude from electrolyte layer, then adds light liquid electric insulating medium, make workpiece work surface be immersed in light liquid electric insulating medium completely;
B: regulate the nozzle of jetelectrode and the relative distance of workpiece work surface;
C: by the nozzle of jetelectrode with electrolyte liquid bundle form off and on to workpiece work surface jet electrolytic liquid;
D: connect the Electrolyzed Processing power supply be connected between jetelectrode negative pole and workpiece work surface anode, carry out Electrolyzed Processing;
E: after reaching processing request, turns off Electrolyzed Processing power supply, closes down jet electrolytic liquid liquid bundle, takes out workpiece.
Described light liquid electric insulating medium is water-fast, that density ratio water is little electric insulating medium.
The nozzle of described jetelectrode and the minimum range of workpiece work surface are not less than 0.1mm.
The nozzle of described jetelectrode and the distance of workpiece work surface are 0.1mm ~ 10mm.
The metal material that described jetelectrode is corroded by acid and alkali resistance is made.
Described jetelectrode is provided with one or more nozzle.
Described light liquid electric insulating medium is kerosene, silicone oil or paraffin oil.
The present invention controls the size in micro-hole by the liquid beam diameter size and injecting time regulating institute's jet electrolytic liquid, micro-hole quantity is controlled by nozzle number, controlled working speed is carried out by the distance controlling jetelectrode and work surface, simple to operate, machining accuracy and working (machining) efficiency high, applied widely, the shape of finished surface is unrestricted, processing link is few, and process costs is low.Simultaneously; the present invention adopts light liquid electric insulating medium as shield mask; adaptability is good; fit closely with machined surface; all the time can protect the non-processing part of to be processed, be easy to restore and revise, effectively reduce the dispersion corrosion effect around machining area; improve locality and the fine sizes working ability of micro-pits machining, machining accuracy is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of liquid beam stream Electrolyzed Processing of the present invention micro-hole method operative installations;
Fig. 2 is that electrolyte impacts the schematic diagram opening light liquid electric insulating medium formation fluid course.
Detailed description of the invention
The method in the micro-hole of liquid beam stream Electrolyzed Processing of the present invention comprises the following steps:
A: the work surface of workpiece 5 is placed in electrolyte 8, makes to be processed peak of workpiece 5 give prominence to electrolyte 8 layers, then adds light liquid electric insulating medium 4, workpiece 5 work surface is immersed in light liquid electric insulating medium 4 completely.Light liquid electric insulating medium 4 is water-fast, that density ratio water is little electric insulating medium.On the one hand, lightweight electric insulating medium 4 can swim on electrolyte 8 all the time, not by the impact of electrolyte 8 cyclic process, and can continue to wrap workpiece 5 work surface; On the other hand, lightweight electric insulating medium 4 can be used as flexible shielding film, can carry out electric field shielding, and lightweight electric insulating medium 4 can adapt to the work surface of any shape to the non-machining area of workpiece 5; Lightweight electric insulating medium 4 can adopt kerosene, silicone oil or paraffin oil.
B: regulate the nozzle 2 of jetelectrode 1 and the relative distance of workpiece 5 work surface.The nozzle 2 of jetelectrode 1 is excessive with the distance of workpiece 5 work surface, then electrolyte liquid bundle 3 easily disperses, and concentration class reduces, beam diameter poor controllability, and required machining voltage is large, and cost is high, and processing locality is low.In addition, due to the required certain thickness electric insulation layer protection of workpiece 5 work surface, and elaboration products need be discharged from the gap of two electrodes, and therefore, two interelectrode distances again can not be too little, and namely nozzle 2 must not be too small with the distance of workpiece 5 work surface.Therefore, the nozzle 2 limiting jetelectrode 1 is 0.1mm ~ 10mm with the distance of workpiece 5 work surface, electrochemical machining process can either be made to meet technological requirement, can possess good adjustability again.
The metal material that jetelectrode 1 is corroded by acid and alkali resistance is made, and to prevent electrode from being corroded by electrolyte 8, affects service life; Jetelectrode 1 according to process requirements, can be provided with one or more nozzle 2, increases work efficiency.
C: by the nozzle 2 of jetelectrode 1 with the form of electrolyte liquid bundle 3 off and on to workpiece 5 work surface jet electrolytic liquid 8.When electrolyte liquid bundle 3 penetrates the electric insulating medium covered on workpiece 5 work surface, will be formed between the machining area that nozzle 2 is corresponding with its electrolyte liquid bundle 3 can the fluid course of conductive electric current, and other region cannot be conducted electricity because of the electric screening action of electric insulating medium.
D: connect the Electrolyzed Processing power supply 6 be connected between jetelectrode 1 negative pole and workpiece 5 work surface anode, carry out Electrolyzed Processing.After opening Electrolyzed Processing power supply 6, under the effect of electric field, the region on workpiece 5 work surface corresponding to each electrolyte liquid bundle 3 will be etched electrochemically, and forms pit; And other region is because the shielding of electric insulating medium and barrier effect, electrolyte 8 cannot be received or the electrolyte 8 that receives is wrapped in dielectric, cannot delivered current effectively, electrical-chemistry method is made to be difficult to carry out, thus the dispersion corrosion effect effectively reduced around machining area, improve locality and the fine sizes working ability of micro-pits machining.Reacted electrolyte 8 due to not with light liquid electric insulating medium 4 phased soln, and there is density contrast, can separate from light liquid electric insulating medium 4 under gravity and depart from area to be machined, be unlikely to impact electrochemical machining process.After sustained firing certain hour, after the several seconds to several minutes, stop spraying.Now, fluid course will be filled by light liquid electric insulating medium 4 and lose electric conductivity, and electrochemical machining process stops automatically.Within this period, integrality and the insulation characterisitic of light liquid electric insulating medium 4 screen layer are restored, to keep good working effect.After electric insulation layer completes recovery, then spray processing a period of time, then rest ... so repeatedly, until arrive processing request, processing is stopped.
Actually add man-hour, need according to injecting time and the idle hours because usually determining each nozzle 2 such as the thickness of light liquid electric insulating medium 4 layers, electrolyte liquid bundle 3 diameter, the flow velocity of jet electrolytic liquid liquid bundle 3, the distance between nozzle 2 and machining area.
E: after reaching processing request, turns off Electrolyzed Processing power supply 6, closes down jet electrolytic liquid liquid bundle 3, takes out workpiece.
Apparatus structure schematic diagram used in the present invention as shown in Figure 1, comprises jetelectrode 1, nozzle 2, light liquid electric insulating medium 4, workpiece 5, Electrolyzed Processing power supply 6, circulating pump 7, electrolyte 8.Under the effect of circulating pump 7, nozzle 2 can spray electrolyte liquid bundle 3.
When using the method in the micro-hole of liquid beam stream Electrolyzed Processing of the present invention:
The first step: the work surface level of cylindrical workpiece 5 is placed in the NaNO of 20%
3in electrolyte 8, to be processed peak of workpiece 5 is made to give prominence to electrolyte 8 layers of about 5mm, then light liquid electric insulating medium 4 is added, in the present embodiment, light liquid electric insulating medium 4 adopts kerosene, the work surface of cylindrical workpiece 5 is immersed in kerosene completely, and kerosene floor height is in workpiece 5 work surface peak 2mm;
Second step: will 10 nozzles 2 be horizontally disposed with and the jetelectrode 1 that nozzle diameter is 0.01mm is placed in directly over workpiece 5 work surface, make the orientation of nozzle 2 parallel with the axis direction of workpiece 5 work surface, nozzle 2 end on adjustment jetelectrode 1 and the distance of workpiece 5 work surface peak are to 3mm;
3rd step: the both positive and negative polarity of Electrolyzed Processing power supply 6 is connected with jetelectrode 1 negative electrode with workpiece 5 work surface anode respectively;
4th step: start circulating pump 7, by the nozzle 2 of jetelectrode 1 to workpiece 5 work surface jet electrolytic liquid liquid bundle 3, after electrolyte liquid bundle 3 penetrates kerosene and forms stable fluid course, opens Electrolyzed Processing power supply 6;
5th step: rest after electrolyte liquid bundle 3 sprays 5 seconds 5 seconds, and then spray and within 5 seconds, rest 5 seconds ... so repeatedly, until the micro-pit array of workpiece 5 work surface reaches processing request; As processed other position, moving nozzle 2 or turning of work piece 5 to relevant position, then carry out Electrolyzed Processing; When after whole workpiece 5 completion of processing, turn off Electrolyzed Processing power supply 6, close down jet electrolytic liquid liquid bundle 3, take out workpiece 5.
Lightweight electric insulating medium processes micro-hole on the surface technical process at cylindrical workpiece 5 that what this example described just utilize kerosene to do, can also utilize other lightweight electric insulating medium 4 such as silicone oil, paraffin oil in plane or other curved surfaces, carry out the Electrolyzed Processing in micro-hole in practice, the injection direction of electrolyte liquid bundle 3 also needs to do corresponding adjustment.
Claims (6)
1. the method in the micro-hole of liquid beam stream Electrolyzed Processing, is characterized in that: comprise the following steps
A: workpiece is placed in electrolyte, makes workpiece to be processed peak protrude from electrolyte layer, then adds light liquid electric insulating medium, make workpiece work surface be immersed in light liquid electric insulating medium completely; Light liquid electric insulating medium is water-fast, that density ratio water is little electric insulating medium;
B: regulate the nozzle of jetelectrode and the relative distance of workpiece work surface;
C: by the nozzle of jetelectrode with electrolyte liquid bundle form off and on to workpiece work surface jet electrolytic liquid;
D: connect the Electrolyzed Processing power supply be connected between jetelectrode negative pole and workpiece work surface anode, carry out Electrolyzed Processing;
E: after reaching processing request, turns off Electrolyzed Processing power supply, closes down jet electrolytic liquid liquid bundle, takes out workpiece.
2. the method in the micro-hole of liquid beam stream Electrolyzed Processing according to claim 1, is characterized in that: the nozzle of described jetelectrode and the minimum range of workpiece work surface are not less than 0.1mm.
3. the method in the micro-hole of liquid beam stream Electrolyzed Processing according to claim 2, is characterized in that: the nozzle of described jetelectrode and the distance of workpiece work surface are 0.1mm ~ 10mm.
4. the method in the micro-hole of liquid beam stream Electrolyzed Processing according to claim 3, is characterized in that: the metal material that described jetelectrode is corroded by acid and alkali resistance is made.
5. the method in the micro-hole of liquid beam stream Electrolyzed Processing according to claim 4, is characterized in that: described jetelectrode is provided with one or more nozzle.
6. the method in the micro-hole of liquid beam stream Electrolyzed Processing according to claim 5, is characterized in that: described light liquid electric insulating medium is kerosene, silicone oil or paraffin oil.
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| CN201310015000.4A CN103084682B (en) | 2013-01-16 | 2013-01-16 | Method of liquid beam jet flows electrolyzing and processing dimples |
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| CN201310015000.4A CN103084682B (en) | 2013-01-16 | 2013-01-16 | Method of liquid beam jet flows electrolyzing and processing dimples |
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| CN103084682B true CN103084682B (en) | 2015-04-22 |
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| CN104096931B (en) * | 2014-06-30 | 2017-05-17 | 河南理工大学 | Method for electrochemically machining micro-pit array |
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