CN106837982A - Increase fastener working surface coefficient of friction improves the scheme of its locking functions - Google Patents
Increase fastener working surface coefficient of friction improves the scheme of its locking functions Download PDFInfo
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- CN106837982A CN106837982A CN201710227277.1A CN201710227277A CN106837982A CN 106837982 A CN106837982 A CN 106837982A CN 201710227277 A CN201710227277 A CN 201710227277A CN 106837982 A CN106837982 A CN 106837982A
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- Prior art keywords
- friction
- coefficient
- working surface
- fastener
- nut
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- Pending
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- 239000000463 material Substances 0.000 claims abstract description 28
- 239000004033 plastic Substances 0.000 claims abstract description 24
- 229920003023 plastic Polymers 0.000 claims abstract description 24
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 238000007590 electrostatic spraying Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 abstract description 4
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 abstract 1
- 238000012856 packing Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
Scheme the present invention relates to improve its locking functions with increase fastener working surface coefficient of friction.It is characterized in that at home and abroad the plain washer of each standard, spring washer, wave washer, the working surface electrostatic spraying mode of nut spray one layer of coefficient of friction numerical value rubber-plastics material higher.Also magnetic washer can be directly prepared into larger rubber and plastic magnet, the NdFeB material of magnetic, be used to increase it with connected compcnent and with the coefficient of friction between nut working surface.The product of fastening force and coefficient of friction is equal to due to frictional force.When the timing of fastening force one, coefficient of friction numerical value are higher, then stiction is bigger, but during stiction force of sliding friction greatly therebetween, the fastener such as nut would not produce Relative sliding, therefore will not also produce loosening.Using new departure of the invention, process is simple, implementation are easy, and the new technology of electrostatic plastic spraying, used in fastener workpiece surface, is dexterously particularly expanded the new application of the new technology.The new technology is not only nontoxic pollution-free, and the recyclable reuse of its waste material, greatlys save cost.
Description
Technical field
The scheme of its locking functions is improved the present invention relates to increase fastener working surface coefficient of friction, particularly can be extensive
Apply and to fastener locking requirement is strict, reliable occasion, be greatly enhanced the effective method of its locking functions, category machinery neck
Domain.
Background technology
Invent and apply plain washer since forefathers, since spring washer, wave washer and threaded fastener, above-mentioned fastener
Each kind is all used widely on the equipment of all trades and professions, facility, scarce classic products can not be neglected as the mankind, from now on
It is eliminated all without withdrawing from the market in the age very long.
But its is inherent to have the disadvantage, due to itself there is some locking functions in static working environment, particularly
The threaded fastener of standard is respectively provided with the function of self-locking.But it is frequent in vibration, but seem in the larger installations and facilities of alternate stress
It is helpless, or even be stymied by, because fastener locking function is unreliable in reality, and the equipment breakdown for leading to occurs repeatedly,
The event of hurting sb.'s feelings can be found everywhere.
Due to the popularization of high-speed railway, the appearance of large bridge is prevented threaded fastener and all kinds of fastenings with parts
Pine requires all to propose more urgent demand.Therefore, the related technical staff in various countries has done substantial amounts of experimental study, bullet is such as used
Simultaneously tight mode, binding nut etc. are a series of locking or self-locking for spring packing ring, nylon panelling nut, deformation screw nut, double nut
Fastener kind improves the locking functions of fastener, but little for important occasion still effect.
In recent years, a collection of high-end anti-loose fastener researched and developed by the technical staff of the states such as the U.S., Japan, Sweden, Germany should
Transport and give birth to, enrich in international fastener high-end market, the Spiralock nuts in such as U.S., the eccentric nut of Japan, Sweden
Special jail packing ring ... of history etc., belongs to the category of frictional force locking the characteristics of its is common, and using being carried by the way of increase normal pressure
High its stiction between connected compcnent improves locking functions.
It is well known that stiction is multiplied by coefficient of friction, i.e. F=μ Q equal to normal pressure, in formula F for stiction be pretension
Power, μ is the coefficient of friction between two articles, and Q is that the stiction F between normal pressure, the bigger two articles of normal pressure Q value is bigger.When
When stiction is more than the force of sliding friction between two articles, will not produce sliding, for fastener, then will not between the two articles
Produce loosening, but normal pressure Q values again can not infinity, typically its numerical value can only take fastener material yield limit 0.5~
0.7 times, and fastener either plain cushion, spring washer or bolt and nut and the connected compcnent overwhelming majority are the steel such as carbon steel, therebetween
Coefficient of friction between 0.1~0.15, even if therefore normal pressure is big again, both be multiplied after its numerical value then very little, therefore quiet rub
Power is wiped with regard to very little, when its numerical value is less than force of sliding friction, sliding will be produced between the two, will result in loosening.Here it is tight
Firmware produces the basic reason for loosening.
The content of the invention
Principle according to F=μ Q of the invention, as long as after two articles are fastened, its working surface does not occur relative displacement, i.e.,
Sliding friction phenomenon is not produced, all the time in static friction state, it is possible to effectively and reliably prevent fastener from being released.For this
In the case where normal pressure Q is certain, as long as coefficient of friction numerical value of the increase between μ values, i.e. two articles contact surface, also can reach fastening
The locking purpose of part.
It is exactly using μ values that the present invention improves its locking scheme its purpose using coefficient of friction between increase fastener working surface
Then its stiction is greatly improved after being enhanced, and can effectively prevent to produce Relative sliding therebetween, is also achieved that fastening
After part fastening, loosening is not produced in severe vibration environment, prevent accident from occurring.Rubbed between its increase fastener working surface
The method of coefficient is as follows, and one layer of friction system is sprayed in the working surface of fastener plain washer, spring washer, wave washer, nut
Number numerical value nonmetallic materials higher；The magnetic washer being made of magnetic material；And using the method for equlvalent coefficient of friction
Increase the coefficient of friction numerical value between threaded fastener and connected compcnent working surface to improve the locking work(of above-mentioned each fastener
Energy.Specific method be plain washer, spring washer, wave washer working surface at least one side, it is preferably two-sided, using electrostatic
The technology mode of spraying, one layer of coefficient of friction numerical value of solidification rubber-plastics material higher.Equally also in the front-end surface of nut, i.e., with
The working surface of connected compcnent contact, one layer of coefficient of friction numerical value rubber and plastic material higher is solidified using the technology mode of electrostatic spraying
Material.Also, using the contraction principle of nut is shunk, reference can be made to my number of patent application is 201611164322.5 entitled " footpaths
To the Anti-loosen stop nut of locking " text, make the friction between screw thread pair thread therebetween, the friction by steel to steel, transformation
Into steel to rubber-plastics material, so as to improve coefficient of friction numerical value therebetween.And using the device of radial contraction, malleation therebetween
Power directs at the radial direction of bolt axial line, then coefficient of friction therebetween also transitions into equlvalent coefficient of friction, and screw thread pair can be improved again
Between coefficient of friction numerical value.
Additionally, the magnetic washer of the relatively high magnetism being made as raw material using ferro-gum, ndfeb magnet, in nut
After fastening, it, due to the effect of magnetive attraction, makes to rub therebetween between nut working surface and the connector working surface for being fastened
Coefficient is greatly increased, and the frictional resistance of generation can also improve the locking functions of fastener after nut screwing clamping.
In sum, several core parts for improving fastener locking function before, its essence is exactly to improve each fastening unit
The coefficient of friction numerical value of part working surface, so as under conditions of normal pressure is constant, greatly improve it and be rubbed with the quiet of connected compcnent
Power is wiped, is not allowed produce therebetween and is slided relatively, so as to also can effectively prevent the loosening of fastener.Due to steel and the friction coefficient μ of steel
Be worth is 0.1~0.15；And the friction coefficient μ value of steel and rubber-plastics material can be 0.6~0.8, if from one factor of coefficient of friction
Consider, it is quiet using carrying out in above-mentioned fastener working surface under conditions of normal pressure Q values are constant using the solution of the present invention
The scheme of electrospray rubber-plastics material, can make stiction increase 4 to 8 times, and the pretension of stiction i.e. threaded fastener
Power, under conditions of keeping former pretightning force magnitude numerical value constant, if friction coefficient μ value increases 4 to 8 times, according to F=μ Q institutes
Show, normal pressure Q values can then reduce 4 to 8 times, then greatly facilitating bolt fastener can work under secure conditions.
Specific embodiment
The present invention, increase fastener surface coefficient of friction improves the scheme of its locking functions, and specific embodiment is to accord with
The conjunction world, GB standard, American Standard, Ying Biao, moral mark, day mark ... wait plain washer, spring washer, the ripple of domestic external fastening element standard
The fasteners such as shape packing ring, nut, in its working surface using the application mode of electrostatic powder coating, solidify last layer as body
Coefficient of friction numerical value rubber-plastics material higher.The technology mode of concrete operations is first to enter the working surface of above-mentioned fastener
Row decontamination, the cleaning work of rust cleaning simultaneously make one layer of its Surface Creation anticorrosive, and can increase " the phosphatization of spray-on coating adhesive force
Layer "；Secondly, using high performance static plastic spraying machine, the powder of rubber-plastics material, using the principle of Electrostatic Absorption, equably sprays
Apply on the work surface；Then, this layer of rubber-plastics material powder that will be sprayed on working surface is heated to 185 DEG C or so, insulation
15 minutes, make it in working surface levelling, solidification；Finally, blow-on is taken out and is cooled down.So as to complete to work in above-mentioned fastener
Surface, spraying solidification one layer of coefficient of friction numerical value rubber-plastics material higher and between carbon steel of attachment.The layer film thickness only has 25 μ
M --- 250 μm, do not influence the normal of above-mentioned all kinds of fasteners to use after general spraying.
The present invention, increase fastener working surface coefficient of friction improves the scheme of its locking functions, and it is used in a device
Method be that will spray the fasteners such as plain washer, spring washer, the wave washer of rubber-plastics material in a conventional way to cover respectively
Upper bolt is arranged between connected compcnent and clamp nut, when screw up with a wrench clamp nut after, then rubbing between working surface
Factor v is wiped, by conventional steel to steel friction, becomes steel to the friction between rubber plastic, and it is known that steel is to rubber plastic
Coefficient of friction between material hinders the stiction F=μ Q of nut loosening i.e. much larger than the coefficient of friction numerical value between steel to steel
In the case that normal pressure Q values are constant, the more big then locking functions of friction coefficient μ value are better.
Similarly, when the plain washer, spring washer, wave washer that are made of magnetic material are substituted ordinary carbon steel material and be made
Above-mentioned tightening member when, its installation and application ibid, due to the worksheet in connected compcnent working surface and clamp nut
Installed between face be with magnetic all kinds of packing rings, therebetween due to magnetic action, then the coefficient of friction between each working surface
Greatly increase, therefore the locking functions of fastener also can be greatly improved with this scheme.
To the standard fastening type nut of domestic and international various countries, as long as also in the worksheet that it is contacted with packing ring or connected compcnent
Face one end, the technology mode that above-mentioned use electrostatic spraying is also adopted by thereon solidifies one layer of rubber powder, it is same its on bolt with quilt
When connector working surface is contacted, coefficient of friction therebetween is also greatly improved, therefore the locking functions of the clamp nut are also with big
To improve, one layer of rubber plastic is also sprayed on the rear end internal thread thread surface of the nut in addition, then it is between bolt thread
Coefficient of friction is also greatly improved.Again by nut back end outer cone fluting boss under the tightening for tightening up nut, compression nut rear end
Internal thread thread, will normal direction hold-down bolt thread.At this moment the coefficient of friction between the screw thread pair then develops into equivalent friction system
Number, is that its equlvalent coefficient of friction is greater than the normal coefficient of friction of its original for 60 ° or 55 ° of fastening thread to angle of thread
, therefore can also improve the locking functions of the nut fastener.
In sum, the present invention, increase fastener working surface friction system improves the scheme of locking functions, abandons conventional
The mode of axle power in unlimited increase nut pretightning force, or increased by the way of contact area between the increase fastener such as flange nut
Big frictional force, is used to the mistaken ideas for preventing fastener from loosening.It is off the beaten track, with electrostatic spraying coefficient of friction numerical value rubber and plastic material high
Material, is solidificated in the working surface of all kinds of conventional fasteners, and its body is still for common ordinary metallic material, and its strong rigidity is not received
Influence.And just starting the new technology of electrostatic powder plastic-spraying promoted the use of in recent years, the not only repeatable recovery of waste material is used, and
Nontoxic free from environmental pollution, its main function is generally used for antiseptic and rustproof protection and beautifying and decorating table to various parts
Face.The present invention is exactly dexterously using the good characteristics of electrostatic spraying on metalwork surface, particularly fastener working surface, spray
Apply one layer of firm coefficient of friction numerical value rubber-plastics material high.Its frictional resistance is improved to improve locking functions.And body is still
It is the metal material fastener of conventional standard, its locking functions can match in excellence or beauty with domestic and international existing various fasteners.
Claims (4)
1. increase fastener working surface coefficient of friction improves the scheme of its locking functions, it is characterized in that：Fastener plain washer,
Spring washer, wave washer, the working surface of nut, the larger nonmetallic materials of one layer of coefficient of friction numerical value of spraying, using magnetic
Property the magnetic washer that is made of material, and using the method for equlvalent coefficient of friction, increase threaded fastener works with connected compcnent
Coefficient of friction numerical value between surface improves the locking functions of above-mentioned fastener.
2. according to claim 1, increase fastener working surface coefficient of friction improves the scheme of its locking functions, and it is special
Levy and be：Fastener plain washer, spring washer, wave washer working surface, i.e., its contacted with connected compcnent surface, nut
Surface, at least one side is preferably two-sided, and the technology mode using electrostatic spraying solidifies one layer of coefficient of friction rubber and plastic material higher
Material.
3. according to claim 1, increase fastener working surface coefficient of friction improves the scheme of its locking functions, and it is special
Levy and be：In the front-end surface of nut, i.e., the working surface for being contacted with connected compcnent, using the technology mode of electrostatic spraying, Gu
Change one layer of coefficient of friction numerical value rubber-plastics material higher, in addition in another working surface of the nut, i.e., contacted with bolt thread
Internal thread thread surface, be also adopted by the mode of electrostatic spraying, one layer of coefficient of friction numerical value of solidification rubber-plastics material higher, and
Using the contraction principle for shrinking nut, reference can be made to my number of patent application is 201611164322.5 entitled " radially lockings
The text of Anti-loosen stop nut ", makes the friction between screw thread pair thread therebetween, by steel to steel, is transformed into steel to rubber and plastic material
Material, improves coefficient of friction numerical value therebetween, and the device tightened up using radial direction, then normal pressure therebetween directs at the axial line of bolt
Radial direction, then coefficient of friction therebetween be also transformed into equlvalent coefficient of friction, the coefficient of friction numerical value between screw thread pair can be improved again.
4. according to claim 1, increase fastener working surface coefficient of friction improves the scheme of its locking functions, its feature
It is：Using rubber and plastic magnet, ndfeb magnet as raw material, the magnetic washer of relatively high magnetism is made, after nut fastening, its
With between nut working surface and the connector working surface for being fastened, due to the effect of magnetive attraction, make coefficient of friction therebetween big
Big to increase, the frictional resistance of generation after nut screwing clamping, can also improve the locking functions of fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710227277.1A CN106837982A (en) | 2017-03-28 | 2017-03-28 | Increase fastener working surface coefficient of friction improves the scheme of its locking functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710227277.1A CN106837982A (en) | 2017-03-28 | 2017-03-28 | Increase fastener working surface coefficient of friction improves the scheme of its locking functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106837982A true CN106837982A (en) | 2017-06-13 |
Family
ID=59146461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710227277.1A Pending CN106837982A (en) | 2017-03-28 | 2017-03-28 | Increase fastener working surface coefficient of friction improves the scheme of its locking functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106837982A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630907A (en) * | 2017-10-25 | 2018-01-26 | 北京临近空间飞行器系统工程研究所 | A kind of derotation self-locking loose-proof thread fastener and its application method |
| CN109773714A (en) * | 2018-12-28 | 2019-05-21 | 常熟市常力紧固件有限公司 | A kind of fastening parts of automobiles coefficient of friction control method |
| CN111207147A (en) * | 2020-03-03 | 2020-05-29 | 中铁隆昌铁路器材有限公司 | Magnetic ring for preventing looseness of threaded fastener and using method thereof |
-
2017
- 2017-03-28 CN CN201710227277.1A patent/CN106837982A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630907A (en) * | 2017-10-25 | 2018-01-26 | 北京临近空间飞行器系统工程研究所 | A kind of derotation self-locking loose-proof thread fastener and its application method |
| CN109773714A (en) * | 2018-12-28 | 2019-05-21 | 常熟市常力紧固件有限公司 | A kind of fastening parts of automobiles coefficient of friction control method |
| CN111207147A (en) * | 2020-03-03 | 2020-05-29 | 中铁隆昌铁路器材有限公司 | Magnetic ring for preventing looseness of threaded fastener and using method thereof |
| CN111207147B (en) * | 2020-03-03 | 2021-07-16 | 中铁隆昌铁路器材有限公司 | Magnetic ring for preventing looseness of threaded fastener and using method thereof |
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Application publication date: 20170613 |