CN101817968A - Novel powder-base friction material and application method thereof - Google Patents
Novel powder-base friction material and application method thereof Download PDFInfo
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Abstract
The invention discloses a novel powder-base friction material and an application method thereof. The friction material comprises the following components in portions by weight: 10-15 portions of modified phenol-formaldehyde resin, 5-10 portions of powdered acrylonitrile-butadiene rubber, 5-10 portions of aramid fiber, 20-25 portions of composite reinforced fiber, 5-10 portions of friction regulator, 5-10 portions of graphite, 8-12 portions of barite powder, 1-5 portions of zinc oxide, 8-12 portions of mica or vermiculite powder, 1-3 portions of feldspar powder, 1-5 portions of ferrite yellow and 5-8 portions of brass powder. The novel powder-base friction material of the invention has sufficient and stable moment of friction under the conditions of different pressures and different speeds, and greatly increases the thermal decomposition temperature of the resin friction material.
Description
Technical field:
The present invention relates to a kind of friction materials and using method thereof, particularly a kind of novel powder friction materials and using method thereof that is used for the high-speed overload operating mode.
Background technology:
Clutch coupling is the vital security arrangement of motor device such as automobile, motorcycle, and friction materials is to produce frictional force in clutch coupling and the friction gear to be used to absorb the critical material that kinetic energy transmits moment of torsion, and its performance quality direct relation reliability of system operation and stability.Along with the raising of each developed country's developing of automobile industry and modern society's environmental consciousness, the operational conditions of friction materials is more and more harsher, and is also more and more higher to its performance requriements, for example enough and stable frictional coefficient will be arranged, and the difference of dynamic and static frictional coefficient is little; Good thermal conductivity, bigger thermal capacity and certain high temperature physical strength are arranged; Good wear resistance and block resistance are arranged, be difficult for the scratch mating plate, noiseless; Low cost, environmentally safe etc.High-quality friction material especially adapts to the high-quality friction material of vehicle high speed and heavy loading and demands exploitation urgently.
From domestic and international research and applicable cases analysis, there are some problem demanding prompt solutions in present friction materials:
The one, the friction and wear behavior of friction materials.The polishing machine of material is under certain working conditions, the general performance of machinery, physics and the chemical property of material itself and mating material.The wearing and tearing of composite friction material are subjected to the influence of proportioning size, distribution situation, morphology, texture structure and form, bonding strength to each other (interface binding power), technological process and the applying working condition etc. of each component in the material.It is generally acknowledged under low temperature and underload that main abrasion mechanism is existing thinks abrasive wear, also have and think adhesive wear or fatigue wear; And in the high-temperature zone, the organism decomposes in the material and mainly show as thermal fatigue wearing and tearing and thermooxidizing wearing and tearing and cause frictional coefficient decline.
The 2nd, high-temperature comprehensive property changes.Under high speed and high pressure effect, friction materials and antithesis surface can reach very high temperature, and be therefore, very high to the high-temperature comprehensive property requirement of friction materials.And for the polymer-based carbon friction materials, because the resistance toheat and the heat conductivility of matrix organic materials are lower, therefore mainly be to add highly heat-conductive material by the matrix resin modification with in matrix material to improve its high-temperature behavior at present.
Therefore, mainly the friction and wear characteristic to friction plate has carried out requirement in the standards system of countries in the world, and again to intensity, impelling strength, hardness propose certain requirement.
Summary of the invention:
The 1st technical problem to be solved by this invention provides a kind of novel powder-base friction material that can not produce heat fading and thermal wear under the Working environment of high-voltage high-speed heavy duty.
The 2nd technical problem to be solved by this invention is the using method of above-mentioned friction materials.
The technical scheme of technical solution problem of the present invention is: novel powder-base friction material, contain following material and weight part:
Modified phenolic resins 10～15
Powdered acrylonitrile-butadiene rubber 5～10
Aramid fiber 5～10
Composite reinforcing fiber 20～25
Friction regulator 5～10
Graphite 5～10
Ground barium sulfate 8～12
Zinc oxide 1～5
Mica or vermiculite power 8～12
Feldspar Powder 1～3
Iron oxide yellow 1～5
Brass powder 5～8.
The length of described aramid fiber is 1～2mm.
The length of described composite reinforcing fiber is 2.0～9.0mm.
The model of described friction regulator is YM2013, and plasticizing company provides by the Hongyuan, Hangzhou.
A kind of using method of powder-base friction material comprises following operation successively:
A) dispersion step: 1000-1500r/min high-speed stirring 2 times, it was uniformly dispersed in each 2～3 minutes aramid fiber;
B) burden process: with the aramid fiber after the above-mentioned dispersion and composite reinforcing fiber, resin modified phenol resin, Powdered acrylonitrile-butadiene rubber, filler weighing and burden;
C) mixed processes: more than 2 times, it was mixed in each 20～30 minutes with the 1000-1500r/min high-speed stirring above-mentioned batching;
D) hot pressing process: the powder that mixes is inserted the hot pressing die die cavity, put the steel backing adhesive, be hot pressed into friction plate, hot pressing temperature is 140～160 ℃, pressure 25～28MPa, insulation 20-30 minute, exits therebetween 1～2 time;
E) thermosetting operation: the friction plate that hot pressing is good, be warming up to 172 ± 5 ℃ after, isothermal curing 5～6 hours, the outage insulation air cooling of coming out of the stove after 2 hours;
F) solidify back work in-process polish plane, turning, the machining of mill outer arc;
G) mark warehouse-in.
Since the fiber support that the friction materials wearing and tearing manifest the time the most of load between the contact surface, so fiber can improve the over-all properties of matrix material.In the prescription of the present invention, seek the reasonably combined of assorted fibre, use high-strength, that resistance to elevated temperatures is excellent aramid fiber, composite reinforcing fiber to mix mutually, the reasonably combined best effect that reaches.
Aramid fiber has good adsorption, can be well with resin and filler is moistening combines, outstanding its thermostability that is a little of aramid fiber, but its is at 180 degrees centigrade of life-time service down, 200 degrees centigrade of strength degradation of 50 hours only 10%.Descend 50% in the time of 300 degrees centigrade, initial heat decomposition temperature is up to 800 degrees centigrade, so, contain this aramid fiber in the friction materials goods, present stable friction factor, wear rate is low, and product density is low, hardness is low, and brake noise is low, does not damage characteristics such as braking antithesis.
Composite reinforcing fiber is that Nanjing is received Kefeng Co., Ltd and produced, be to be main raw material with selected basalt, diabase, limestone, rhombspar, metallurgical coke, add a certain proportion of mixture, main production is to carry out spinning and carry out surface treatment by the high-temperature smelting pot above 1000 ℃.Through the fiber that high-temperature fusion is made, its major advantage is wear resistance, heat-resisting, enhancing.But fiber accounts for volume fraction and crosses senior general and reduce the uniformly dispersed of bounding force between polymkeric substance and the fiber and fiber in matrix material, thereby influences its tribological property.Fibre reinforced composites also are subjected to multiple factor affecting in wear process in addition.Think: cross when low when fibre content, fiber ruptures because of stretching or shearing, and reinforced effects is also not obvious: and fibre content is too high, causes that inhomogeneous and defective appears in material internal, thus cause wearing and tearing to increase.
In order to obtain wear resistance preferably, there is a scope of application in its reinforced fiber content usually, so the present invention contains the aramid fiber short fibre of 5-10 weight part, the composite reinforcing fiber of 10-20 weight part.
Evidence powder-base friction material of the present invention is under different pressures, friction-motion speed, enough and stable moment of frictions are arranged, increase substantially the heat decomposition temperature of resin friction materials simultaneously, solved resin rubber friction materials easy difficult problem that produces heat fading and thermal wear under the Working environment of high-voltage high-speed heavy duty well.Therefore this novel powder-base friction material has sufficiently stable moment of friction under the high-speed overload operating mode, heat resistanceheat resistant decline property, does not damage excellent frictional wear over-all properties such as antithesis.
The major ingredient of friction regulator is the friction powder, has stable frictional coefficient, reduces noise, reduces abrasion;
Barite: at high temperature, it can form stable friction interlayer, can prevent the mating material galled spots, makes the antithesis surface grind brighter and cleanlyer;
Feldspar Powder: belong to hard filler, it is remarkable to increase the effect of rubbing;
Mica powder or vermiculite power: have performance high temperature resistant preferably, friction resistant;
Ground barium sulfate: at high temperature, it can form stable friction interlayer, can prevent the mating material galled spots, makes the antithesis surface grind brighter and cleanlyer;
Graphite: belonging to the antifriction solid lubricant, is a kind of special material, and thermal conductivity is 0.1, can reduce the wearing and tearing that frictional coefficient can reduce mating material again, thereby improves the work-ing life of friction materials:
Zinc oxide: the high temperature friction properties modifier, in higher friction working temperature zone more than 250 ℃ until 400 ℃, i.e. resin generation pyrolysated temperature province has good frictional coefficient.
The fiber of the filler of certain proportioning and certain content can obtain enough big driving torque, and wear rate is low under high-temperature situation, is specially adapted to the friction plate of high-speed overload.
The production process of traditional resin rubber friction materials is generally as follows: raw material weighs → mixes → glue be smelt open → hot pressing → curings → mill processing → check puts in storage.In preparation technology of the present invention, moulding and bonding novel process are finished in raw material blending powdered base frication materials such as aramid fiber after employing will be broken up and composite reinforcing fiber, caking agent, filler and a hot pressing of steel backing spare, need not the mixing one-tenth of resin rubber based raw material is opened, simplify technical process, increased substantially production efficiency.Owing to be to have adopted multiple blending in of fibers powdered base frication materials such as aramid fiber, composite reinforcing fiber, the miscellaneous effect has determined the performance of material self and the degree that mixes to a great extent between fiber and resin glue, the filler in the novel powder-base friction material prescription of the present invention.Because aramid fiber has extremely strong electronegativity, the uniform mixing difficulty is bigger.In order to prevent that aramid fiber and composite reinforcing fiber from twining mutually, form little group respectively, can't be even, therefore at first adopt high speed rotating (1000-1500rpm) stirrer at first aramid fiber is carried out 2 times and disperses, and then stir for 20～30 minutes 2 times at a high speed with 1000r/min with other raw materials and to make it be mixed into powder-base friction material.The main effect of stirring makes between the raw material and mixes, and is beneficial to have between each fibre fractionation well to mix effect and they fully contact with resin, the infiltration degree of raising resin.If stir insufficiently, then mix effect and be difficult to reach.The mixed batch mixing outward appearance of novel powder-base friction material of the present invention is velvet-like, evenly, various fibers are interlaced, filler and toner distribute wherein, resin material has good wetting property and snappiness, has guaranteed that each component such as resin and filamentary material, stopping composition etc. can be bonding well, therefore only needs a hot pressing, need not friction materials glue is smelt and open, just can finish friction materials moulding and bonding.
And hot pressing temperature depends primarily on the resin system in the powder-base friction material, and hot pressed time and temperature and state of resin have certain relation, and the heat pressing process temperature of this process using is 140～160 ℃, pressure 25～25Mpa, and the dwell time is 20 minutes.
Novel powder-base friction material of the present invention has following advantage: under different pressures, friction-motion speed, enough and stable moment of frictions are arranged, increase substantially the heat decomposition temperature of resin friction materials simultaneously, solved general resin rubber friction materials easily produces heat fading and thermal wear under the Working environment of high-voltage high-speed heavy duty a difficult problem well.This novel powder-base friction material not only has sufficiently stable moment of friction under the high-speed overload operating mode, heat resistanceheat resistant decline property, wear rate be little, do not damage excellent high temperature friction and wear over-all properties such as antithesis, and need not glue and be smelt and open, once hot-forming and bonding, production technique is simple, energy-conserving and environment-protective.Novel powder-base friction material of the present invention and current domestic and international outstanding product contrast have certain advantage, wherein, are applied in the motorcycle engine, compare with the Japanese Yamaha product, and the product towing time of the present invention is 40～45 seconds, than its big 10～15s.Raw materials cost of the present invention is lower, and technology is simple, and very big advantage is arranged on cost performance.
Embodiment
Below in conjunction with embodiment the present invention is done detailed explanation.
Aramid fiber of the present invention is provided by Hongyuan, Hangzhou plasticizing company.
Composite reinforcing fiber is received Kefeng Co., Ltd by Nanjing and is produced.
Powdered acrylonitrile-butadiene rubber is produced by Mount Huang China blue chemical industry company limited.
Modified phenolic resins is produced by the good permanent company in Qingdao.
Friction regulator is provided by Hongyuan, Hangzhou plasticizing company.
Embodiment 1:
With 6 weight part length is 1～2mm aramid fiber 1000r/min high-speed stirring 2 times, each 2～3 minutes, after stirring is uniformly dispersed it, with 20 weight part composite reinforcing fibers, 6 weight part Powdered acrylonitrile-butadiene rubber, 11 weight part modified phenolic resinss, 10 weight part friction regulators, 6 weight part graphite, 8 weight part ground barium sulfates, 5 part by weight of zinc oxide, 12 weight part mica or vermiculite powers, 3 weight part Feldspar Powders, 5 weight part iron oxide yellows, 8 weight part brass powders are with the high-speed stirring of 1000r/min 2 times, each 20～30 minutes, make it be mixed into powder-base friction material, insert the hot pressing die die cavity, putting the steel backing adhesive, is finished product through 20 minutes hot pressing.Wherein hot pressing temperature is 140～160 ℃, pressure 25～28MPa, insulation 20 minutes, exits therebetween 1～2 time; After then finished product being placed curing oven and being warming up to 172 ± 5 ℃, isothermal curing 5～6 hours, the outage insulation air cooling of coming out of the stove after 2 hours, finished product is finished product after through polishing plane, turning, the machining of mill outer arc behind the air cooling.
Friction materials of the present invention is detected by wet type (non-metal kind) friction materials, State Standard of the People's Republic of China (GB/T13826-2008) through QM1000-II type Wet-type friction material performance aircraft by embodiment 1 products made thereby, and it is measured result such as table 1 under different pressure, speed:
Table 1
Embodiment 2:
With 8 weight part aramid fibers 1000r/min high-speed stirring 2 times, after it being uniformly dispersed in each 2～3 minutes, with 23 weight part composite reinforcing fibers, 7 weight part Powdered acrylonitrile-butadiene rubber, 13 weight part modified phenolic resinss, 8 weight part friction regulators, 8 weight part graphite, 7 weight part ground barium sulfates, 4 part by weight of zinc oxide, 10 weight part mica or vermiculite powers, 1 weight part Feldspar Powder, 4 weight part iron oxide yellows, 7 weight part brass powders are with 1000r/min high-speed stirring 2 times, each 20～30 minutes, make it be mixed into powder-base friction material, insert the hot pressing die die cavity, putting the steel backing adhesive, is finished product through 20 minutes hot pressing.Wherein hot pressing temperature is 140～160 ℃, pressure 25～28MPa, insulation 20 minutes, exits therebetween 1～2 time; After then finished product being placed curing oven and being warming up to 172 ± 5 ℃, isothermal curing 5～6 hours, the outage insulation air cooling of coming out of the stove after 2 hours, finished product is finished product after through polishing plane, turning, the machining of mill outer arc behind the air cooling.
Friction materials of the present invention is detected by embodiment 2 products made therebies and embodiment 1 same procedure, and it is measured result such as table 2 under different pressure, speed:
Table 2
Embodiment 3:
With 10 weight part aramid fibers 1000r/min high-speed stirring 2 times, after it being uniformly dispersed in each 2～3 minutes, with 25 weight part composite reinforcing fibers, 10 weight part Powdered acrylonitrile-butadiene rubber, 15 weight part modified phenolic resinss, 5 weight part friction regulators, 7 weight part graphite, 8 weight part ground barium sulfates, 2 part by weight of zinc oxide, 8 weight part mica or vermiculite powers, 2 weight part Feldspar Powders, 2 weight part iron oxide yellows, 6 weight part brass powders are with 1000r/min high-speed stirring 2 times, made it be mixed into powder-base friction material in each 20～30 minutes, insert the hot pressing die die cavity, putting the steel backing adhesive, is finished product through 20 minutes hot pressing.Wherein hot pressing temperature is 140～160 ℃, pressure 25～28MPa, insulation 20 minutes, exits therebetween 1～2 time; After then finished product being placed curing oven and being warming up to 172 ± 5 ℃, isothermal curing 5～6 hours, the outage insulation air cooling of coming out of the stove after 2 hours, finished product is finished product after through polishing plane, turning, the machining of mill outer arc behind the air cooling.
Friction materials of the present invention is detected by embodiment 3 products made therebies and embodiment 1 same procedure, and it is measured result such as table 3 under different pressure, speed:
Table 3
Above result shows: along with the increase of speed and pressure, surface temperature rise also constantly increases, but friction material layer absorption power of the present invention also increases gradually, so surface temperature rise is little, and the frictional coefficient heat fading is little.
The results show: novel powder-base friction material of the present invention has following advantage: under different pressures, friction speed, enough and stable moment of frictions are arranged, increased substantially simultaneously the heat decomposition temperature of resin friction material, not only has sufficiently stable moment of friction under the high-speed overload operating mode, heat fading is little, wear rate is little, do not damage the excellent high temperature friction and wear combination property such as antithesis, and production technology is simple, energy-conserving and environment-protective. The outer outstanding product contrast of novel powder-base friction material of the present invention and Present Domestic also has certain advantage, wherein, be applied in the motorcycle engine, through vowing that fast rotating speed durability experiment stand pulls long duration test under half-clutch state, the product towing time of the present invention is 40～45 seconds, than the towing time of Japanese Yamaha product big 10～15s.
Claims (4)
1. novel powder-base friction material is characterized in that: contain following material and weight part:
Modified phenolic resins 10～15
Powdered acrylonitrile-butadiene rubber 5～10
Aramid fiber 5～10
Composite reinforcing fiber 20～25
Friction regulator 5～10
Graphite 5～10
Ground barium sulfate 8～12
Zinc oxide 1～5
Mica or vermiculite power 8～12
Feldspar Powder 1～3
Iron oxide yellow 1～5
Brass powder 5～8.
2. novel powder-base friction material according to claim 1 is characterized in that: the length of described aramid fiber is 1～2mm.
3. novel powder-base friction material according to claim 1 is characterized in that: the length of described composite reinforcing fiber is 2.0～9.0mm.
4. the using method of the described novel powder-base friction material of claim 1 comprises following operation successively:
A) dispersion step: 1000-1500r/min high-speed stirring 2 times, it was uniformly dispersed in each 2～3 minutes aramid fiber;
B) burden process: with the aramid fiber after the above-mentioned dispersion and composite reinforcing fiber, resin modified phenol resin, Powdered acrylonitrile-butadiene rubber, filler weighing and burden;
C) mixed processes: more than 2 times, it was mixed in each 20～30 minutes with the 1000-1500r/min high-speed stirring above-mentioned batching;
D) hot pressing process: the powder that mixes is inserted the hot pressing die die cavity, put the steel backing adhesive, be hot pressed into friction plate, hot pressing temperature is 140～160 ℃, pressure 25～28MPa, insulation 20-30 minute, exits therebetween 1～2 time;
E) thermosetting operation: the friction plate that hot pressing is good, be warming up to 172 ± 5 ℃ after, isothermal curing 5～6 hours, the outage insulation air cooling of coming out of the stove after 2 hours;
F) solidify back work in-process polish plane, turning, the machining of mill outer arc;
G) mark warehouse-in.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604571A (en) * | 2011-01-19 | 2012-07-25 | 上海壬丰复合材料有限公司 | Adhesive used for brake shoe for urban rail transit and its manufacturing method |
| CN102993635A (en) * | 2012-12-03 | 2013-03-27 | 浙江科马摩擦材料股份有限公司 | Method for preparing clutch facing through taking water soluble phenol-formaldehyde resin as adhesion agent |
| CN103527683A (en) * | 2013-10-18 | 2014-01-22 | 江苏祥龙摩擦材料有限公司 | Novel metal-free carbon ceramic disc brake block and manufacturing method thereof |
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| US4111891A (en) * | 1976-11-12 | 1978-09-05 | Johns-Manville Corporation | Friction material for railroad disc brakes |
| CN101235153A (en) * | 2008-01-09 | 2008-08-06 | 韩德忠 | Asbestos-free composite enhancement fibre for friction material and producing technique thereof |
| CN101613516A (en) * | 2008-06-26 | 2009-12-30 | 比亚迪股份有限公司 | Be used to prepare the friction material composition and the friction materials of brake facing |
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2010
- 2010-03-12 CN CN2010101247060A patent/CN101817968B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4111891A (en) * | 1976-11-12 | 1978-09-05 | Johns-Manville Corporation | Friction material for railroad disc brakes |
| CN101235153A (en) * | 2008-01-09 | 2008-08-06 | 韩德忠 | Asbestos-free composite enhancement fibre for friction material and producing technique thereof |
| CN101613516A (en) * | 2008-06-26 | 2009-12-30 | 比亚迪股份有限公司 | Be used to prepare the friction material composition and the friction materials of brake facing |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604571A (en) * | 2011-01-19 | 2012-07-25 | 上海壬丰复合材料有限公司 | Adhesive used for brake shoe for urban rail transit and its manufacturing method |
| CN102993635A (en) * | 2012-12-03 | 2013-03-27 | 浙江科马摩擦材料股份有限公司 | Method for preparing clutch facing through taking water soluble phenol-formaldehyde resin as adhesion agent |
| CN102993635B (en) * | 2012-12-03 | 2014-04-02 | 浙江科马摩擦材料股份有限公司 | Method for preparing clutch facing through taking water soluble phenol-formaldehyde resin as adhesion agent |
| CN103527683A (en) * | 2013-10-18 | 2014-01-22 | 江苏祥龙摩擦材料有限公司 | Novel metal-free carbon ceramic disc brake block and manufacturing method thereof |
| CN103527683B (en) * | 2013-10-18 | 2016-05-04 | 江苏祥龙摩擦材料有限公司 | A kind of without metal carbon ceramics disc brake pad and preparation method thereof |
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| CN101817968B (en) | 2011-11-09 |
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