CN107598668A - A kind of Surface Texture method of electric-field enhancing emulsion lubrication - Google Patents
A kind of Surface Texture method of electric-field enhancing emulsion lubrication Download PDFInfo
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- CN107598668A CN107598668A CN201710724588.9A CN201710724588A CN107598668A CN 107598668 A CN107598668 A CN 107598668A CN 201710724588 A CN201710724588 A CN 201710724588A CN 107598668 A CN107598668 A CN 107598668A
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Abstract
The present invention relates to a kind of Surface Texture method of electric-field enhancing emulsion lubrication, belong to lubrication technology and Surface Texture technical field.The method of the invention be by the use of emulsion in droplet size, Stern layers and the surface of solids distance as surface of solids texture size design considerations, and the attraction using extra electric field to chargeding oil droplet in emulsion, oil droplet in emulsion is fixed in the suitable Surface Texture of size, it can ensure that oil droplet directly reaches CONTACT WITH FRICTION area and oil film will not rupture, enhance oil droplet to form boundary lubricant film or carry the ability and its stability of oil film, improve its bearing capacity and lubricating ability；The surface antifriction processing that methods described can be widely applied under the emulsion environments such as tool for cutting machining.
Description
Technical field
The present invention relates to a kind of Surface Texture method of electric-field enhancing emulsion lubrication, belong to lubrication technology and Surface Texture
Technical field.
Background technology
Fretting wear in mechanical industry is to cause the principal element of surface failure, and such as cutter, bearing, gear are present bright
The surface abrasion of the part of aobvious relative motion and failure.Actual machinery part surface has certain roughness, in friction,
Real contact area compares simply small part with apparent area, and actual contact area is that rough surface is rough
Microcell.When contacting surface generation relative motion, load is distributed only in limited contact area so that is existed to surface of rubbing bright
Aobvious extruding, friction and high temperature, it is due to the effects such as mechanism, the effect of the high temperature thermal softening of frictional heat of frictional force that it, which wears,
Synthesis result.Except various classical surface treatment skills such as face coat, surface machinery, heat, chemistry or Ion Implantation Strengthenings
Art, the main method for reducing fretting wear at present are mainly rational surface-texturing processing and select suitable lubricant.
Surface Texture is the non-light for being processed as having specific function Mechanical Builds by even curface using specific method
Sliding surface, existing research have fully proved that its tool is significantly improved mantle friction state and antifriction function.And Surface Texture skill
Art is typically based on reducing frictional force, reduce friction, cooling effect is considered relatively fewer.For requiring to reduce the portion to rub
Position, the lubricant in industry is usually lubricating oil, the use for also having a small amount of kollag in recent years, and its cooling performance is general
All over poor.Although green manufacture technology is quickly grown, fluid lubricant is still indispensable in mechanical industry.It is wherein newborn
Change the advantages of liquid has good oil lubricity, water cooling function admirable concurrently, be commonly used as cutting in metal cutting process industry at present
Liquid.
Chinese patent CN204127307U is described one kind and reduced using secondary vortices caused by Koch snowflake types texture inside
The method of frictional resistance in motion process；Chinese patent CN103028746A describes a kind of compound texture self-lubricating ceramics of micro-nano
Cutter and preparation method thereof, it can prevent to bond, reduce friction, reduce abrasion, improve cutter life；Chinese patent
CN102000841A describes the cutter of the miniature antifriction groove with filled solid lubricant, can effectively reduce tool wear；In
State patent CN104355283A describes produces capillary wedge effect using the wedge shaped features of Surface Texture, makes liquid single on surface
Direction is sprawled and moved, and enhances the lubricating function of liquid.
However, it is dependent in existing report for technologies such as the micro- texture in surface of friction surface anti-attrition and increase lubricants
It is less to consider under lubricating fluid microstructure characteristic and high pressure, high speed in surface geometry design and lubricating fluid self performance
Influence of micro- texture to lubrication membrane stability.
The content of the invention
In view of this, it is an object of the invention to provide a kind of Surface Texture method of electric-field enhancing emulsion lubrication, institute
The method of stating be by the use of emulsion chargeding oil droplet size and the distance on Stern layers and surface as the design of Surface Texture size according to
According to, the good chargeding oil droplet of lubricity is fixed in the suitable Surface Texture of size by the attraction of chargeding oil droplet using electric field,
So as to effectively improve the bearing capacity of interface oil film and lubricating ability, methods described can be widely applied to tool for cutting machining etc.
Surface antifriction processing under emulsion environment.
The purpose of the present invention is achieved through the following technical solutions.
A kind of Surface Texture method of electric-field enhancing emulsion lubrication, methods described are the chis according to emulsion chargeding oil droplet
The distance of very little, Stern layers and the surface of solids processes the groove of corresponding size in the surface of solids, and in the surface of solids plus suitable
Potential, reach fix emulsification in oil droplet purpose, comprise the following steps that：
(1) cutting liquid stock solution of commercialization is diluted with water, is well mixed, obtains emulsion；
Wherein, in the emulsion, the quality of cutting liquid stock solution and the mass ratio of water are 1:19~1:9；
(2) the average diameter D of oil droplet in emulsion is obtained using the measurement of nano particle size meter；
The solid-liquid interface Zeta potential between the surface of solids that emulsion and needs lubricate is measured using zeta potential instrument
Form electric double layer between emulsion and the surface of solids that lubricates of needs, by double electrode layer theory calculate Stern layers with
The approximate distance L of the surface of solids lubricated, i.e. electric double layer thickness are needed, calculation formula is as follows,
Wherein, σ is surface charge density, Cm-2, can be measured with electric charge tester is charged by friction；ε is that medium dielectric is normal
Number, Fm-1, can table look-up to obtain；For surface potential, V, that is, the solid-liquid interface Zeta potential measured；δ is electric double layer thickness, m；
(3) groove in the surface of solids processing section for needing to lubricate for semicircle, and a diameter of (D+2L) of section semicircle；
The depth of groove is (D/2+L+ Δs), and Δ is (0~0.3) D；Consider the greasy property of oil droplet micro-structural in emulsion, right
The influence of contact strength, the center spacing of adjacent grooves is 2 (D+2L)；
According to different contact movement situations, and the material of solid is combined, select the value of Δ：Non-high-speed, non-heavily loaded bar
Δ can be ignored under part, and Δ is (0.1~0.2) D under high-speed condition, and Δ is (0.2~0.3) D under fully loaded transportation condition；Different materials
The definition of the high-speed cutting of the solid of matter also differs, as the high-speed cutting speed of the solid of aluminium material is not less than 1000m/min,
The high-speed cutting speed of the solid of stainless steel is not less than 300m/min, and Δ takes in (0.1~0.2) D under high-speed condition appoints
Meaning value；Heavily loaded processing situation will be defined, it is necessary to consider cutting speed, cutting deeply according to the pressure under different operating modes
Degree and the amount of feeding, as when Heat-Resistant Steel Cutting Cutting speed is 90min, cutting depth 5mm, the amount of feeding are 0.9mm/r, Δ is (0.2
~0.3) arbitrary value is taken in D；
(4) applying intensity to the surface of solids after texture isPotential after, be dipped in emulsion immersion and be not less than
2min, using suction-operated of the surface of solids electric field to chargeding oil droplet in emulsion, oil droplet can be assembled in the groove of texture；
In to the surface of solids friction process that rubs, continue to the surface of solids apply intensity bePotential.
Beneficial effect：
The method of the invention be by the use of emulsion in the distance of droplet size, Stern layers and the surface of solids be used as solid
The design considerations of Surface Texture size, and the attraction of chargeding oil droplet in emulsion will be moistened in emulsion using extra electric field
The good oil droplet of slip is fixed in the suitable Surface Texture of size, it is ensured that oil droplet directly reaches CONTACT WITH FRICTION area and oil film will not
Rupture；Electric field, texture enhance oil droplet and form boundary lubricant film or the ability for carrying oil film and its steady to the fixation of oil droplet
It is qualitative, improve its bearing capacity and lubricating ability；The good water of cooling performance also reaches CONTACT WITH FRICTION area, energy in emulsion
Enough temperature for effectively reducing friction zone, the thermal softening of material is reduced, so as to reduce surface abrasion.The method of the invention is by surface
The advantages of texture and emulsion lubrication/cooling, combines, and strengthens lubrication of the emulsion in micro- texture surface using electric field action
Performance, a kind of new design considerations is proposed to Surface Texture, and this method can be widely applied to the emulsification pendular ring such as tool for cutting machining
Surface antifriction processing under border.
Brief description of the drawings
Fig. 1 is the microstructure schematic diagram of oil droplet in emulsion.
Fig. 2 is self assembly schematic diagram of the oil droplet in surface of solids texture in the emulsified liquid of DC Electric Field.
Fig. 3 is that Surface Texture during rubbing and extra electric field are illustrated to the enhancing effect of emulsion lubrication, cooling effect
Figure.
Embodiment
The present invention is further elaborated with reference to the accompanying drawings and detailed description, wherein, methods described is as without especially
Explanation is conventional method, and the raw material can obtain from open commercial sources unless otherwise instructed.
Embodiment 1
LEUCHSOL RGX commercializations cutting liquid stock solutions are with deionized water according to 1:19 mass ratio is mixed, and is emulsified
Liquid；Due to the selective absorption effect of surfactant contained in cutting liquid stock solution, the oil droplet outermost layer in emulsion is in
Now obvious charged characteristic, as shown in Figure 1；
6 parts of samples are taken out from emulsion, droplet size in 6 parts of samples is measured using Malvern nano particle size meter respectively,
The average diameter D for calculating oil droplet in acquisition emulsion is 4 μm；
Using zeta potential instrument measurement emulsion and the carbide tool surfaces of SNMG 120408 of KENNAMETAL productions
Solid-liquid interface Zeta potential, measureFor -72.3mV；
Electric double layer is formed between emulsion and tool surface, electric double layer thickness is calculated according to equation below,
Wherein, σ is surface charge density, uses electric charge tester to measure surface charge density σ as -7.45 × 108C·m-2；ε is dielectric permittivity, and because 95% is all water in emulsion, then ε is approximately equal to the dielectric constant 81Fm of water-1；For
Surface potential, it is worth for -72.3mV；It is 7.86nm that the thickness δ of electric double layer, which then can be calculated, according to formula, i.e., Stern layers with
The approximate distance L of tool surface is 7.86nm, can be ignored in the design process of groove size；
Tested according to theory of metal cutting or actual cut, analyze the tool-chip contact area of rake face in working angles
Position, region friction is most violent, the abrasion of cutter also most serious, so the region surface in new cutter processes rule
A diameter of 4 μm of hemispherical groove of distribution；It is non-high-speed, non-heavily loaded processing in the working angles described in the present embodiment
Condition, so the depth design of groove is into 2 μm；In addition, consider the greasy property of oil droplet micro-structural in emulsion, to contact
The influence of intensity, the center spacing of adjacent grooves is 8 μm；
Applying intensity to the tool surface after texture isPotential, and cutter is placed in emulsion and soaks 2min,
Using suction-operated of the tool surface extra electric field to chargeding oil droplet in emulsion, oil droplet can be adsorbed, assembled and is fixed on and knitted
In the groove of structure, as shown in Figure 2；
During actual cut, continue holding is to tool surface application intensityElectrical potential conditions, contact press
Oil droplet deforms in the presence of power and frictional force, and the suction-operated of electric field and micro- texture are mechanically fixed effect, it is ensured that
Oil droplet after deformation is fixed in micro- texture, as shown in Figure 3；Oil droplet deformation can increase loaded area, improve bearing capacity and drop
Low-friction coefficient；The water of interface then can effectively reduce the temperature in CONTACT WITH FRICTION area, thus can effectively reduce rubbing for interface
Wipe.
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's
Within protection domain.
Claims (2)
- A kind of 1. Surface Texture method of electric-field enhancing emulsion lubrication, it is characterised in that：Methods described comprises the following steps that,(1) cutting liquid stock solution of commercialization is diluted with water, is well mixed, obtains emulsion；(2) the average diameter D of oil droplet in emulsion is obtained using the measurement of nano particle size meter；The thickness δ of the electric double layer formed between emulsion and the surface of solids for needing to lubricate is calculated by equation below,Wherein, σ is surface charge density, and ε is dielectric permittivity,For surface potential；The thickness of electric double layer is Stern layers With the approximate distance L for the surface of solids for needing to lubricate；(3) groove in the surface of solids processing section for needing to lubricate for semicircle, and a diameter of (D+2L) of section semicircle, groove Depth be (D/2+L+ Δs), the center spacing of adjacent grooves is 2 (D+2L), and Δ is (0~0.3) D；(4) be to the surface of solids application intensity after texture-Potential after, be dipped in emulsion immersion and be not less than 2min, Take out；In to the surface of solids friction process that rubs, continue to the surface of solids apply intensity for-Potential.
- A kind of 2. Surface Texture method of electric-field enhancing emulsion lubrication according to claim 1, it is characterised in that：Emulsification In liquid, the quality of cutting liquid stock solution and the mass ratio of water are 1:19~1:9.
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| CN101343592A (en) * | 2008-08-20 | 2009-01-14 | 哈尔滨工业大学 | Magnetized oil emulsion and preparation thereof |
| CN102000841A (en) * | 2010-09-26 | 2011-04-06 | 山东大学 | Self-lubricating and self-cooling dry cutter and manufacturing method thereof |
| CN202556807U (en) * | 2012-05-24 | 2012-11-28 | 福建船政交通职业学院 | Indium-lubrication surface texture |
| CN102966829A (en) * | 2012-11-20 | 2013-03-13 | 浙江万里学院 | Method for lubricating textured and magnetized surface with magnetic liquid |
| CN103028746A (en) * | 2012-11-09 | 2013-04-10 | 山东大学 | Micro-nano composite texture self-lubricating ceramic tool and manufacture method thereof |
| CN104117773A (en) * | 2014-07-17 | 2014-10-29 | 西安交通大学 | Self-lubricating anti-attrition composite structure surface manufacturing method based on laser texturing |
| CN204127307U (en) * | 2014-08-06 | 2015-01-28 | 昆明理工大学 | A kind of mechanical seal ring based on snowflake curve Surface Texture drag reduction |
| CN106531392A (en) * | 2016-12-01 | 2017-03-22 | 东莞市佳乾新材料科技有限公司 | Method for lubricating texture and magnetized stainless steel surface employing magnetic liquid |
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2017
- 2017-08-22 CN CN201710724588.9A patent/CN107598668B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343592A (en) * | 2008-08-20 | 2009-01-14 | 哈尔滨工业大学 | Magnetized oil emulsion and preparation thereof |
| CN102000841A (en) * | 2010-09-26 | 2011-04-06 | 山东大学 | Self-lubricating and self-cooling dry cutter and manufacturing method thereof |
| CN202556807U (en) * | 2012-05-24 | 2012-11-28 | 福建船政交通职业学院 | Indium-lubrication surface texture |
| CN103028746A (en) * | 2012-11-09 | 2013-04-10 | 山东大学 | Micro-nano composite texture self-lubricating ceramic tool and manufacture method thereof |
| CN102966829A (en) * | 2012-11-20 | 2013-03-13 | 浙江万里学院 | Method for lubricating textured and magnetized surface with magnetic liquid |
| CN104117773A (en) * | 2014-07-17 | 2014-10-29 | 西安交通大学 | Self-lubricating anti-attrition composite structure surface manufacturing method based on laser texturing |
| CN204127307U (en) * | 2014-08-06 | 2015-01-28 | 昆明理工大学 | A kind of mechanical seal ring based on snowflake curve Surface Texture drag reduction |
| CN106531392A (en) * | 2016-12-01 | 2017-03-22 | 东莞市佳乾新材料科技有限公司 | Method for lubricating texture and magnetized stainless steel surface employing magnetic liquid |
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