CN106051001A - Environmentally friendly three-dimensional composite reinforced organic brake pad and preparation technology thereof - Google Patents
Environmentally friendly three-dimensional composite reinforced organic brake pad and preparation technology thereof Download PDFInfo
- Publication number
- CN106051001A CN106051001A CN201510822623.1A CN201510822623A CN106051001A CN 106051001 A CN106051001 A CN 106051001A CN 201510822623 A CN201510822623 A CN 201510822623A CN 106051001 A CN106051001 A CN 106051001A
- Authority
- CN
- China
- Prior art keywords
- brake block
- parts
- dimensional
- brake pad
- dimensional composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses an environmentally friendly three-dimensional composite reinforced organic brake pad and a preparation technology thereof and relates to the technical field of automobile brake pad material preparation. Modified hot-pressing process preparation technology is adopted, the three different-dimensional inorganic functional fillers of zero-dimensional cenospheres, one-dimensional potassium hexatitanate whiskers and two-dimensional crystalline flake graphite are combined and added into a formula of a non-asbestos organic (NAO) brake pad, and thus brake pad material forms an environmentally friendly stable three-dimensional composite reinforced space network mixed structure. The material comprises the following components of, by weight, 8-13 parts of phenolic resin, 2-5 parts of aramid fibers, 13-17 parts of ceramic fibers, 22-31 parts of barite, 4-6 parts of rubber powder, 4-6 parts of talcum powder, 4-6 parts of vermiculite, 1-4 parts of artificial graphite, 3-7 parts of cashew nut shell oil modified friction powder, 1-3 parts of brown aluminium oxide, 6-20 parts of the cenospheres, 4-13 parts of potassium hexatitanate whiskers and 6-10 parts of modified flake graphite. The raw materials used by the brake pad are wide in source and low in price, and the formed formula is free of copper or heavy metal or asbestos and environmentally friendly. The brake pad is high in mechanical property, the friction coefficient is stabilized at 0.44-0.47, heat fading resistance is good at the high temperature of 300 DEG C or above, and the abrasion rate is low.
Description
Technical field
The present invention relates to automobile brake sheet technical field of material, particularly provide a kind of brake pad material making design to have three-dimensional collaborative hybrid structure, compositing formula have without copper, heavy metal free, without asbestos characteristic of environmental protection obvious design of material method and low cost technology of preparing thereof.
Background technology
Automobile brake sheet is to ensure that the vitals of ride safety of automobile.Along with auto industry and the development of social civilization, at a high speed, fast pace, heavy load, high efficiency and personalized purposes etc. are increasing to the Comprehensive performance requirement of brake block, the popular of the consumption concepts such as the resources conservation especially globalized, environment friendly and pollution-free, low-carbon energy-saving is popularized, and existing automotive brake pad material all suffers from many challenges from being designed into technology of preparing.
First, it is the environmental issue of brake block compositing formula.Along with disabling the asbestos reinforcing agent relatively early used in brake block formula due to effects on environment and health (as can carcinogenecity) comprehensively, preferable alternative compositions metallic copper and other heavy metal raw material as asbestos material function cause extensive concern the most day by day to the hazardness of environment and human body.Within 2010, begin, Deng Duojia mechanism of american car employer's organization signature cooperation memorandum, combine initiation " without copper brake block " action, to reduce environmental pollutions such as rivers.Washington states etc. have promulgated legislation the most, force to limit copper content in brake block, are reduced to not higher than 0.5% in 2023 by being initially not higher than the 5% of quality of brake pad.Also the content of beary metal in brake pad material is any limitation as (Poh Wah Lee simultaneously, Peter Filip, Wear 302 (2013) 1,404 1413) because the heavy metal mainly produced by the brake block abrasive dust such as oxidation reaction in atmosphere containing Sb sulfide can form stable carcinogenic compound (D.
Varrica, F. Bardelli, G. Dongarrà, E.
Tamburo, Atmospheric Environment 64 (2013) 18 24).Therefore, reducing copper and heavy metal component content in brake block formula, researching and developing the brake block without copper, heavy metal free content has become international automobile industry development trend.And at home, the environmental issue of common brake block does not the most cause enough attention.Existing relevant environmental protection is prepared in patent documentation without copper NAO type and ceramic brake, does not nearly all have heavy metal component clearly to limit use (CN 102585767A as functional stuffing；CN 104179860 A；CN
103821582 A；CN 102191016 A；CN 101823856A).
Secondly, it is the stability problem of brake block combination property.At present, the main flow friction material formulation on market mainly has semimetal formula, low metal formulations and NAO (organic without asbestos) formula.The major advantage of NAO brake block is no matter high temperature or low temperature can control braking effect well, be effectively reduced brake noise, good friction and wear behavior adjustability etc..Being a kind of typical multi-element composite material without asbestos organic (NAO) brake block, with resin binder, fibre reinforcement, filler and frictional property regulator are basic composition.Its combination property can include the performances such as stable mechanics, calorifics and mechanical friction abrasion, and they depend on compositing formula design and the preparation technology of employing of original material.Although it has been reported the evaluation model about organic brake block performance formula and analysis method both at home and abroad, extension assessment approach (the member Rong Ping of such as domestic scholars, Lv Yafei, nonmetallic ore 32 (2009) 72-73) and the perfect solution analogy method (Bhabani of document report
K.Satapathy, Abhijit Majumdar, et al, Materials
And Design 31 (2010) 1,937 1944) etc..But, due to brake pad material composition complexity and the diversity of preparation technology, universal brake block factory formula design still also exists the choosing of such as raw material type, the coupling of material performance and optimization and the reasonable theoretical to brake block performance phenomenon is explained and the series engineering technical problem such as performance prediction.For the stability of brake block combination property recognize with formula design associate safeguards technique, all lack system in-depth study, more less than the most succinctly, clearly theoretical model method give scientific explarnation.Such as, on Vehicles Collected from Market, brake block formula has thousands of kind, the selection of various raw materials is all to draw according to brake block manufacturer experience and lot of experiments, take substantial amounts of manpower and materials and financial resources, sometimes there is also length research cycle, workload is big and random chance is big problem and the most unified theoretical foundation.
3rd, it is the efficient technology of preparing problem of brake block.The environmental-protecting performance fierce in current brake block market requires and under the dual-pressure of low cost technology of preparing, and the innovation of the technology of preparing of brake block has been crucial and the content of core.Both at home and abroad in disclosed document and patented technology, explore respectively use biomass material (such as Pericarpium Musae, bamboo fibre), trade waste (flyash and lime-ash) etc. as brake block filler succedaneum (Idris,
U.D. et al., Journal of King Saud University–Engineering
Sciences (2013)；Zheng Kaikui, high really brightness etc., Chinese science and technology paper 10(2015) 1935-1938；CN 101724378 A).Alternative materials can be greatly reduced material preparation cost under not losing original serviceability such as mechanics and high-temperature hot degenerative premise.But, the Performance Match problem of other component raw material in alternative materials and brake block has become the outstanding problem during production and application, and alternative materials has the strongest region dependency and source unstability.Therefore, alternative materials cheap, abundant is usually associated with improving further and the stable control of the quality of production of brake block scale manufacturing technique.
Summary of the invention
Three the prominent technical problems existed based on current above-mentioned brake block preparation field, it is an object of the invention to provide that a kind of low production cost, environmental pollution be little, frictional behaviour is good without copper, heavy metal free, without asbestos organic braking automobile design method and technology of preparing thereof.It is exactly in various dimensions mixed raw material standby automobile brake sheet production technology starting stage that the three-dimensional composite strengthening that the present invention proposes works in coordination with hybrid structure modular concept, by precise controlling, priority selects zero dimension cenosphere, one-dimensional modified potassium titanate fibre, the modified crystalline flake graphite of two dimension etc. has different spaces dimension functional material order and adds in brake block basic components, utilize the overlapping and physical and chemical performance complex effect that intersects between its Spatial Dimension, produce the complementation on dimension and yardstick with collaborative enhancing, reach the purpose making brake block combination property be stabilized raising.
For achieving the above object, the present invention is by the following technical solutions:
A kind of environmental protection organic brake block of three-dimensional composite strengthening, its material prescription is the component composition of following parts by weight: phenolic resin 8-13, aramid fiber 2-5, ceramic fibre 13-17, barite 22-31, rubber powder 4-6, Pulvis Talci 4-6, Vermiculitum 4-6, Delanium 1-4, cashew nut oil modified Frication powder 3-7, Brown Alundum 1-3, cenosphere 6-20, crystal whisker of hexa potassium titanate 4-13, modified crystalline flake graphite 6-10.
Further, the component that the better performance formula brake pad material developed according to the principle of the invention comprises following parts by weight forms: phenolic resin 10, aramid fiber 3, alumina-silicate ceramic fibre 15, barite 30, rubber powder 5, Pulvis Talci 5, Vermiculitum 5, Delanium 2, cashew nut oil modified Frication powder 3, Brown Alundum 2, cenosphere 7.5, crystal whisker of hexa potassium titanate 5, modified crystalline flake graphite 7.5.
The technology of preparing of a kind of environmental protection organic brake block of three-dimensional composite strengthening, comprises the following steps:
(1) batch mixing is weighed: according to the percentage composition of raw materials various determined by formula, the cenosphere KER-200B type standard screen in raw material is carried out sizing staged care stand-by；First will cross cenosphere and crystal whisker of hexa potassium titanate, the crystalline flake graphite low speed batch mixing 5min in plough type batch mixer of 80 mesh sieves,
Aramid fiber and blanc fixe powder body are put into HX0280 type friction material dedicated mixer again and first carries out the premix of 10min, more above-mentioned two sections of material and other filler are stirred batch mixing, persistent period 8-15min；
(2) the steel back of the body processes: the microwave cleaning oil removing of the steel back of the body of patterning process is cleaned, dries and carry out ball blast roughening treatment；After reaching appropriate roughness, then it is standby to carry out spraying and adhesive bonding agent on its surface；
(3) hot-forming: above-mentioned mixed dispensing and ready steel are carried on the back one be placed into UMD type heat pressing forming machines is carried out hot-forming, forming temperature 150 DEG C-160 DEG C, pressure 25-35MPa, dwell time 8-10min,
Period aerofluxus 5-6 time；
(4) heat treatment: put into by the brake block sample of molding and be warming up to 140 DEG C of insulation 1-2h in heat treatment box, 160 DEG C are incubated 5-7h, 180 DEG C of insulation 1-2h, and solidification end 1h unpacks and cools down and outlet；
(5) later stage machining: use FR3680 type electromagnetic type surface grinding machine, Fr4300 type grooving chamfering machine, UMD type hot air circulation drying tunnel, carries out corase grind respectively and refines, opens chamfering, sandblasting, goes the PROCESS FOR TREATMENT such as deburring, burr；
(6) coding, packaging: product code-spraying, use electrostatic painting process, and spraying equipment rotating speed is 180rpm, ambient temperature 170 DEG C；Packaging, riveting before packaging, installation adnexa, check finished product.
The technology of the present invention, compared with existing technology, has obvious beneficial effect and innovation has:
(1) present invention develop brake pad material without copper, heavy metal free, without asbestos, environment protecting is obvious.In a kind of environmental protection three-dimensional composite strengthening organic brake block formula composition, do not use the material component such as copper powder of cupric, copper fiber etc.；The most do not use the heavy metal component raw materials such as leaded, cadmium, antimony.Thus from source, cut off the secondary environmental pollution problem that brake block uses.
(2) a kind of environmental protection three-dimensional composite strengthening organic brake block stable performance that the present invention develops, combination property is high.A kind of environmental protection organic brake block of three-dimensional composite strengthening that the present invention develops, Sample FormulationsThe is above-mentioned better formula composition, tests on constant speed testing machine according to standard GB/T 5763-2008, and friction and wear behavior result is as shown in the table.
As can be seen from the table, the brake block coefficient of friction of the present invention is high, stable friction factor, heat resistanceheat resistant decline better performances；Temperature rise period, coefficient of friction was at 0.44-0.50,
Temperature-fall period coefficient of friction is good in 0.43-0.49, brake security and sensitivity, and wear rate is less, in 0.1-0.6 × 10-7cm3In the range of/N.m, it is fully achieved the quality level that national standard requires.Being arranged on by brake block of the present invention on triumphant more F car, repeatedly find after braking, the present invention brakes sensitive, and proportion is little, and heat fading is little, comfortable foot feeling, and brake noise is less；To mating material not damaged, without falling ash；And not heavy metal and the compound thereof such as cupric, environmental pollution is little；The friction material life-span reaches more than 30000 kilometers.
(3) present invention develop a kind of environmental protection organic brake pad material of three-dimensional composite strengthening and technology of preparing, raw material sources are wide, cheap, technique is simple, cost efficiency is high.First, as the cenosphere of important filler, wide material sources, cheap.It is reported, cenosphere can be separately won by rinsing choosing by substantial amounts of trade waste flyash.Cenosphere is utilized to not only facilitate the friction and wear behavior improving brake block as brake block filler, effectively alleviate the own wt of brake pad material, and be the effective way of flyash garbage high added value comprehensive utilization, there is obvious social enviroment protection and economic circulation meaning.Secondly, while latency environment pollution components raw material uses in effectively evading conventional brake slice prescription component, it is effectively utilized the high-performance potassium titanate crystal whisker of modification and modified crystalline flake graphite material synergistic combination performance.And, in order to be further ensured that novel brake pad effective efficiency and quality do not reduce, the preparation technology link that the present invention proposes strengthens the quality control that becomes more meticulous that technique produces.Particularly, in order to enable brake block intrinsic silicon to form the three-dimensional composite strengthening network structure that the present invention proposes, selecting materials, the enforcement of the process procedure such as material mixing, molding, heat treatment step by step, priority Quality Control Technology means (production technology operational flowchart is Figure of description 1).The production technology used is substantially the most general, simple production technology, it is not necessary to extra increase investment transformation, thus the further innovation and development of beneficially medium-sized and small enterprises production technology.
(4) the three-dimensional composite strengthening hybrid network structure model theory that present invention innovation proposes a kind of environmental protection, the organic brake block of high-performance has.This theory can preferably explain the excellent mechanics of the organic brake block of three-dimensional composite strengthening that the present invention develops and friction and wear behavior.This 3 d function complementary type network struture system that has formed that builds is to be network skeleton by raw materials such as feature two dimension crystalline flake graphites, intersect, the one-dimensional potassium titanate crystal whisker of interconnection is connection reinforcing body, the fillers such as zero dimension cenosphere embed its structural void, thus form stable three-dimensional space network structure.This special network structure body significantly enhances friction material internal system interface, surface property stability, give the friction and wear behavior that friction material is higher and more stable, combination property can reach cupric, serviceability requirement containing environmental contamination conventional brake sheets such as heavy metals, and this also provides a kind of new Structured Design Research Thinking for the research and development of friction material component design.
Accompanying drawing explanation
Fig. 1 is friction material die press technology for forming separate operations flow chart.
Sample CP series and embodiment sample CFP5 friction factor and temperature profile in Fig. 2-1 comparative example.
Sample FP series and embodiment sample CFP5 friction factor and temperature profile in Fig. 2-2 comparative example.
Fig. 3 embodiment and different formulations friction material sample wear rate and variations in temperature graph of a relation in comparative example.
Specimen surface stereoptics microscope figure after sample FP5 constant speed frictional experiment in Fig. 4-1 comparative example.
Specimen surface stereoptics microgram after sample CP0 constant speed frictional experiment in Fig. 4-2 comparative example.
Specimen surface stereoptics microscope figure after sample CFP5 constant speed frictional experiment in Fig. 4-3 embodiment.
Detailed description of the invention
In order to illustrate that the organic brake block of environmental protection based on three-dimensional composite strengthening hybrid network structure model theory that the present invention proposes designs and preparation principle, below in conjunction with embodiment and comparative example formulation samples performance evaluation, technical scheme and implementation result are described in further detail.
Embodiment 1 (this sample is defined as CFP5)
A kind of environmental protection organic brake block of three-dimensional composite strengthening includes the component of following parts by weight: phenolic resin 10, aramid fiber 3, alumina-silicate ceramic fibre 15, barite 30, rubber powder 5, Pulvis Talci 5, Vermiculitum 5, Delanium 2, cashew nut oil modified Frication powder 3, Brown Alundum 2, cenosphere 7.5, crystal whisker of hexa potassium titanate 5, modified crystalline flake graphite 7.5.
The technology of preparing of a kind of environmental protection organic brake block of three-dimensional composite strengthening, comprises the technical steps that:
(1) batch mixing is weighed: according to the percentage composition of raw materials various determined by formula, the hollow glass micropearl KER-200B type standard screen in raw material is carried out sizing staged care stand-by；First will cross cenosphere and crystal whisker of hexa potassium titanate, the crystalline flake graphite low speed batch mixing 5min in plough type batch mixer of 80 mesh sieves,
Aramid fiber and blanc fixe powder body are put into HX0280 type friction material dedicated mixer again and first carries out the premix of 10min, more above-mentioned two sections of material and other filler are stirred batch mixing, persistent period 12min；
(2) the steel back of the body processes: the microwave cleaning oil removing of the steel back of the body of patterning process is cleaned, dries and carry out ball blast roughening treatment；After reaching appropriate roughness, then it is standby to carry out spraying and adhesive bonding agent on its surface；
(3) hot-forming: above-mentioned mixed dispensing and ready steel are carried on the back one be placed into UMD type heat pressing forming machines is carried out hot-forming, forming temperature 150 DEG C-160 DEG C, pressure 25-35MPa, dwell time 8-10min；In the 1-3min that hot pressing starts, period aerofluxus 5-6 time；
(4) heat treatment: put into by the brake block sample of molding and be warming up to 140 DEG C of insulation 2h in heat treatment box, 160 DEG C are incubated 6h, 180 DEG C of insulation 1.5h, and solidification end 1h unpacks and cools down and outlet；
(5) later stage machining: use FR3680 type electromagnetic type surface grinding machine, Fr4300 type grooving chamfering machine, UMD type hot air circulation drying tunnel, carries out corase grind respectively and refines, opens chamfering, sandblasting, goes the PROCESS FOR TREATMENT such as deburring, burr；
(6) coding, packaging: product code-spraying, use electrostatic painting process, and spraying equipment rotating speed is 180rpm, ambient temperature 170 DEG C；Packaging, riveting before packaging, installation adnexa, check finished product.
Embodiment 2
A kind of environmental protection organic brake block of three-dimensional composite strengthening includes the component of following parts by weight: phenolic resin 12, aramid fiber 3, alumina-silicate ceramic fibre 12, barite 28, rubber powder 3.5, Pulvis Talci 3.5, Vermiculitum 3.5, Delanium 3.5, cashew nut oil modified Frication powder 6, Brown Alundum 2, cenosphere 12, crystal whisker of hexa potassium titanate 5, modified crystalline flake graphite 6；
Preparation technology is with embodiment 1.
Embodiment 3
A kind of environmental protection organic brake block of three-dimensional composite strengthening includes the component of following parts by weight: phenolic resin 8, aramid fiber 3, alumina-silicate ceramic fibre 15, barite 26, rubber powder 4.5, Pulvis Talci 4.5, Vermiculitum 4.5, Delanium 4.5, cashew nut oil modified Frication powder 6, Brown Alundum 2, cenosphere 10, crystal whisker of hexa potassium titanate 5, modified crystalline flake graphite 7；
Processing method is with embodiment 1.
Embodiment 4
A kind of environmental protection organic brake block of three-dimensional composite strengthening includes the component of following parts by weight: phenolic resin 9, aramid fiber 3, alumina-silicate ceramic fibre 15, barite 23, rubber powder 4.5, Pulvis Talci 4.5, Vermiculitum 4.5, Delanium 4.5, cashew nut oil modified Frication powder 6, Brown Alundum 2, cenosphere 14, crystal whisker of hexa potassium titanate 4, modified crystalline flake graphite 6；
Preparation method is with embodiment 1.
This sample of comparative example 1(is defined as CP0)
A kind of environmental protection organic brake block of three-dimensional composite strengthening includes following parts by weight component: phenolic resin 10, aramid fiber 3, alumina-silicate ceramic fibre 15, barite 30, rubber powder 7, Pulvis Talci 7, Vermiculitum 7, cashew nut oil modified Frication powder 1, cenosphere 20；
Processing method is with embodiment 1.
This sample of comparative example 2(is defined as CP5)
A kind of environmental protection organic brake block of three-dimensional composite strengthening includes following parts by weight component: phenolic resin 10, aramid fiber 3, alumina-silicate ceramic fibre 15, barite 30, rubber powder 7, Pulvis Talci 7, Vermiculitum 7, cashew nut oil modified Frication powder 1, cenosphere 15, crystal whisker of hexa potassium titanate 5；
Processing method is with embodiment 1.
This sample of comparative example 3(is defined as FP0)
A kind of environmental protection organic brake block of three-dimensional composite strengthening includes following parts by weight component: phenolic resin 10, aramid fiber 3, alumina-silicate ceramic fibre 15, barite 30, rubber powder 7, Pulvis Talci 7, Vermiculitum 7, cashew nut oil modified Frication powder 1, modified crystalline flake graphite 20；
Processing method is with embodiment 1.
This sample of comparative example 4(is defined as FP5)
A kind of environmental protection organic brake block of three-dimensional composite strengthening includes following parts by weight component: phenolic resin 10, aramid fiber 3, alumina-silicate ceramic fibre 15, barite 30, rubber powder 7, Pulvis Talci 7, Vermiculitum 7, cashew nut oil modified Frication powder 1, modified crystalline flake graphite 15, crystal whisker of hexa potassium titanate 5；
Processing method is with embodiment 1.
In embodiment and comparative example, disc surface hardness is tested according to standard GB/T/T5766-2007 " friction material Rockwell hardness test method "；According to the related request of standard GB/T 5763-2008 " brake spacer for automobile ", all samples are carried out constant speed frictional behaviour test on XD-MSM type constant speed formula frictional testing machine；By XJ-A type shear testing maschine test sample shear strength, and observe specimen surface pattern situation after friction and wear test with Germany's organism optometry microscope (ZEISS, Discovery V20).
Embodiment is as shown in the table with the physical and mechanical properties of brake block sample in comparative example.The friction and wear behavior relativity result of brake block sample sees Figure of description 2-1, Fig. 2-2 and Fig. 3；Brake block frictional experiment rear surface abrasion stereoptics microscope figure is given respectively by Figure of description 4-1,4-2 and 4-3.
| Physical and mechanical property | CP0 | CP5 | FP0 | FP5 | CFP5 |
| Density (g/cm3) | 2.056 | 2.096 | 2.224 | 2.110 | 2.140 |
| Hardness (HRS) | 81 | 87 | 76 | 82 | 84 |
| Shear strength (MPa) | 8.11 | 8.61 | 8.58 | 8.45 | 9.36 |
Experimental result relative analysis
As can be seen from the above table, five groups of sample rates are more or less the same.Wherein, the sample CP0 of density minimum is for containing only cenosphere filler sample, and this is that cenosphere has caused by the intrinsic feature of hollow light weight.The density of brake block is closely related with compressibility, and sample structure loosens and contributes to weakening brake noise and the effect of brake chatter.But, the mechanical property such as hardness that sample CP0 is corresponding and shear strength is relatively low.In general, in table, sample shear strength and hardness the most all meet the requirement of standard GB/T 5763-2008.Additionally, from shear strength, CP0 sample is not owing to adding potassium titanate crystal whisker, when there is frictional damping with mating plate surface, owing to only there is abrasive wear mechanism, the matrix that granule strengthens does not has the drawing effect of fiber etc., the anti-shearing stress of its microcosmic is the most weak, so its shear strength is minimum, and the CFP5 sample added with three kinds of filler mixing, owing to the spatial mixing cooperative effect of three-dimensional filler plays the strengthening action to overall brake sheet, so macroscopic view shear strength is the highest.
From Figure of description 2-1 coefficient of friction and temperature relation comparison diagram it can be seen that the CP Series of Samples containing different proportion cenosphere is under the conditions of level pressure (0.98MPa), constant speed (480r/min) frictional experiment, the higher friction factor of overall holding.Due to the abrasive grinding effect of cenosphere when CP0 sample Wear Mechanism is mainly low temperature, and resin high temperature generation viscosity flow is combined more weak with smooth bead surface, thus friction factor is on a declining curve with dish temperature rise, especially after 250 DEG C, sample coefficient of friction is remarkably decreased；The CP5 brake block sample that with the addition of appropriate crystal whisker of hexa potassium titanate is the most steady in high temperature section, it may be possible to whisker overlaps the flowing hindering cenosphere, and friction surface forms stable transfer membrane, maintains stablizing of coefficient of friction.Figure of description 2-2 display doping two-dimensional sheet graphite FP series of samples entirety coefficient of friction is relatively low.Raising with experimental temperature, sample friction factor first reaches peak, then begins to decline.This is owing to graphite has good heat conduction and complete layer structure, plays the effect of kollag in formula.During low temperature, due to slip shear action, the sheet shape crystalline flake graphite of point stripping is easy to be formed the carbonaceous transfer membrane of smooth and continuous at brake block and antithesis surface, thus stabilizes coefficient of friction.And resin is heated generation viscosity flow when high temperature, the layer structure of scale itself causes the cohesive force with binding agent to reduce, and makes material bulk strength reduce, and causes the situation the most drastically declined after moment coefficient of friction increases.Therefore, brake block formula should the content of conservative control crystalline flake graphite be 6-10 part, prevent it from causing brake safe hidden danger because of brake intensification rapidly.And it being doped with CP5, FP5, CFP5 brake block sample of crystal whisker of hexa potassium titanate, high temperature section has more stable frictional behaviour, fully confirms that potassium hexatitanate can significantly improve the heat resistanceheat resistant degenerative of friction material.Diagram CFP5 brake block sample is 100-250 DEG C of whole temperature ranges, and stable friction factor is 0.44-between 0.47, demonstrate good high-temperature stability.Under high temperature, whisker connects main body as strengthening, and zero dimension cenosphere and two dimension crystalline flake graphite mix the three-dimensional net structure that formation is implicative of each other, and develop into stable enhancing reinforced structure system.When sample is drawn and cuts iso-stress, whisker will bear and conduct corresponding load and stress, hinder the deformation fracture of goods, thus serve good enhancing, reinforcing effect.
Figure of description 3 is that the brake block sample wear rate of five groups of different ratio in embodiment and comparative example raises change curve with temperature.100-in the range of 200 DEG C, rising with temperature, wear rate entirety is in rising trend.Wherein adding the wear rate that FP0 and the FP5 brake block sample holding of crystalline flake graphite is relatively low, the lubrication property that this is with flake graphite stratiform cleavage structure has is relevant, can slow down the direct friction resistance between friction material and mating plate surface, thus reduce wear rate；Appropriate graphite plays the effect that heat conduction is wear-resisting in brake block really, but the interpolation of a large amount of graphite (sample FP0) makes friction material hardness entirety reduce, and after causing 300 DEG C, wear rate rises suddenly, abrasion aggravation.Adding CP0 and CP5 of cenosphere, wear rate the most steadily rises along with temperature rise always, because the more weak microballon having made abrasive material effect of the cohesive force of cenosphere and resin matrix can fall off under certain impact force action.During high temperature, the disc surface abrasion adding microballon shows less than the brake block wear rate adding graphite, and when high temperature is described, microballon filler can delay the abrasion of friction material.In sample CP5 and FP5 component, owing to the addition of potassium titanate crystal whisker is compared with single interpolation microballon and flake graphite (sample CP0 and FP0) filler, wearability significantly improves, and wear rate reduces.Potassium titanate crystal whisker and cenosphere are used in mixed way has collaborative complex effect in brake block system, crystal whisker of hexa potassium titanate heat conductivity is low, reduce the rising of material self-temperature during frictional heat, it is ensured that bonding good between resin matrix and reinforcement, reduce abrasion；Simultaneously, make brake block friction surface plastic deformation relatively easy in the case of with the presence of the cenosphere of appropriate level, it is more closely knit that friction surface forms transfer membrane structure, being conducive to the ditch dug with a plow plow effect slowing down itself high rigidity to mating plate surface, the two synergism makes high temperature wear rate not have obvious ascendant trend.On the other hand, the complementation on the difference in functionality filler of use produces due to multi-level space crossed eclipsing effects (hollow ball-shape, crystal whisker-shaped, flaky material) in shape yardstick and dimension is worked in coordination with enhancing and is made brake block can at high temperature keep preferable wear resistance.Therefore, using CFP5 sample that cenosphere, potassium titanate crystal whisker and crystalline flake graphite prepared as major function filler to raise, along with temperature, the variation tendency keeping mild, wear rate is relatively low, has played obvious structure and function synergic effect between three.
Figure of description 4 is brake block specimen surface optical morphology situation after constant speed wear test that in the present invention, embodiment and comparative example utilize different dimensions filler to prepare.Fig. 4-1 illustrates that the specimen surface after being worn and torn with the brake block sample FP5 of potassium titanate crystal whisker compound preparation jointly by crystalline flake graphite is smooth, and a small amount of block shape abrasive dust peels off the friction process showing this sample with adhesive wear mechanism for primary friction mechanism；By Fig. 4-2 it can be seen that the abrasion of CP0 specimen surface is more serious, the spherical graininess abrasive dust of light is cenosphere, and mating plate surface is with abrasive wear mechanism for primary friction mechanism, shows as obvious brake noise and the ash that falls；Fig. 4-3 is the brake block sample CFP5 worn surface prepared by the void fillers of three kinds of different dimensions, this shape characteristic is dispersed with rule along frictional direction, is almost parallel to each other the ditch dug with a plow shape polishing scratch of distribution and block mantle friction pull-up falls, tomography is the most smooth, illustrates with abrasive wear and adhesive wear the mixed film friction wear mechanism as dominant mechanism.Can analyze according to figure and judge, space scale cooperative compensating effect due to three kinds of fillers, play the complex effect of component material physical property, when causing fricting shearing to occur, cumulative distribution inequality effect when can conduct and slow down Mechanical loading in time and the drastically problem of temperature rise of friction induction, the effectively coefficient of friction of stability of composite materials and improve the overall wear resistance level at interface, and aforesaid experimental results has concordance.
Claims (6)
1. the environmental protection organic brake block of three-dimensional composite strengthening, it is characterised in that: its material prescription is the component composition of following parts by weight: phenolic resin 8-13, aramid fiber 2-5, ceramic fibre 13-17, barite 22-31, rubber powder 4-6, Pulvis Talci 4-6, Vermiculitum 4-6, Delanium 1-4, cashew nut oil modified Frication powder 3-7, Brown Alundum 1-3, cenosphere 6-20, crystal whisker of hexa potassium titanate 4-13, modified crystalline flake graphite 6-10.
2. a technology of preparing for the organic brake block of environmental protection three-dimensional composite strengthening, its obvious characteristic includes techniques below step:
(1) batch mixing is weighed: according to the percentage composition of raw materials various determined by formula, the cenosphere KER-200B type standard screen in raw material is carried out sizing staged care stand-by；First will cross cenosphere and crystal whisker of hexa potassium titanate, the crystalline flake graphite low speed batch mixing 5min in plough type batch mixer of 80 mesh sieves,
Aramid fiber and blanc fixe powder body are put into HX0280 type friction material dedicated mixer again and first carries out the premix of 10min, more above-mentioned two sections of material and other filler are stirred batch mixing, persistent period 8-15min；
(2) the steel back of the body processes: the microwave cleaning oil removing of the steel back of the body of patterning process is cleaned, dries and carry out ball blast roughening treatment；After reaching appropriate roughness, then it is standby to carry out spraying and adhesive bonding agent on its surface；
(3) hot-forming: above-mentioned mixed dispensing and ready steel are carried on the back one be placed into UMD type heat pressing forming machines is carried out hot-forming, forming temperature 150 DEG C-160 DEG C, pressure 25-35MPa, dwell time 8-10min, period aerofluxus 5-6 time；
(4) heat treatment: put into by the brake block sample of molding and be warming up to 140 DEG C of insulation 1-2h in heat treatment box, 160 DEG C are incubated 5-7h, 180 DEG C of insulation 1-2h, and solidification end 1h unpacks and cools down and outlet；
(5) later stage machining: use FR3680 type electromagnetic type surface grinding machine, FR4300 type grooving chamfering machine, UMD type hot air circulation drying tunnel, carries out corase grind respectively and refines, opens chamfering, sandblasting, goes the PROCESS FOR TREATMENT such as deburring, burr；
(6) coding, packaging process: product code-spraying, use electrostatic painting process, and spraying equipment rotating speed is 180rpm, ambient temperature 170 DEG C；Packaging, also packs product through riveting, installation applet programme, inspection finished product before packaging.
A kind of environmental protection organic brake block of three-dimensional composite strengthening the most according to claim 1, its composition characteristic is: brake pad material includes the component of following parts by weight: phenolic resin 10, aramid fiber 3, alumina-silicate ceramic fibre 15, barite 30, rubber powder 5, Pulvis Talci 5, Vermiculitum 5, Delanium 2, cashew nut oil modified Frication powder 3, Brown Alundum 2, cenosphere 7.5, crystal whisker of hexa potassium titanate 5, modified crystalline flake graphite 7.5.
A kind of environmental protection organic brake block of three-dimensional composite strengthening the most according to claim 1, it is technically characterized in that selected cenosphere filler is low cost, the synthesis material of wide material sources or the side-product of trade waste flyash；The crystal whisker of hexa potassium titanate used and crystalline flake graphite all combine the compatibility through the pre-modification of chemical surfactant to improve its dispersibility in brake block matrix and basal body interface；Surfactant used can be that the compounds such as oleic acid, stearic acid, magnesium stearate or sodium stearate are independent and mixed form；Described frictional property regulator includes having the raw materials such as the inorganic mineral Pulvis Talci of stratiform cleavage structure, Vermiculitum.
A kind of environmental protection three-dimensional composite strengthening organic brake block technology of preparing the most according to claim 2, it is characterised in that: the fabricating technology that the present invention proposes is the quality management &control technology becoming more meticulous the general integrated strengthening of hot press forming technology flow implementation, microcosmic；Particularly, in order to make can be formed inside brake block organic matrix the three-dimensional composite strengthening network structure that the present invention proposes, selecting materials in production technology operating process, each Technology link is implemented step by step, priority, gradient type quantify Quality Control Technology means for material mixing, molding, heat treatment etc..
6. according to a kind of environmental protection organic brake block of three-dimensional composite strengthening described in claim 1,2 and 3 and technology of preparing thereof, it is characterised in that: mechanics that the three-dimensional organic brake block of composite strengthening is excellent and friction and wear behavior are owing to building the organic network structural system with 3 d function complementary type formed in its matrix；This 3 d structure model is to be network skeleton by raw materials such as feature two dimension crystalline flake graphites, and the one-dimensional potassium titanate crystal whisker intersect, interconnected is for connecting reinforcing body, and the filler such as zero dimension cenosphere embeds its structural void, thus forms stable three-dimensional space network structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510822623.1A CN106051001B (en) | 2015-11-24 | 2015-11-24 | The organic brake block of the three-dimensional composite strengthening of one kind environmental protection and its technology of preparing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510822623.1A CN106051001B (en) | 2015-11-24 | 2015-11-24 | The organic brake block of the three-dimensional composite strengthening of one kind environmental protection and its technology of preparing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106051001A true CN106051001A (en) | 2016-10-26 |
| CN106051001B CN106051001B (en) | 2018-05-01 |
Family
ID=57179485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510822623.1A Active CN106051001B (en) | 2015-11-24 | 2015-11-24 | The organic brake block of the three-dimensional composite strengthening of one kind environmental protection and its technology of preparing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106051001B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678215A (en) * | 2016-12-20 | 2017-05-17 | 佛山市恒学科技服务有限公司 | Multi-dimensional composite high-strength brake pad |
| CN109226712A (en) * | 2018-11-05 | 2019-01-18 | 佛山市南海镕信金属制品有限公司 | A kind of die casting machine clout waste material recovery device and treatment process |
| CN109704638A (en) * | 2018-12-25 | 2019-05-03 | 桐庐宇鑫汽配有限公司 | A kind of brake spacer for automobile |
| CN109737160A (en) * | 2019-02-22 | 2019-05-10 | 中国科学院兰州化学物理研究所 | A kind of modification phenolic resin-based brake block friction material and preparation method thereof |
| CN112762119A (en) * | 2020-12-22 | 2021-05-07 | 中山市赛福特汽车配件有限公司 | Preparation method of brake pad with good heat fading resistance effect |
| CN113294464A (en) * | 2021-05-26 | 2021-08-24 | 广西荣昇新材料有限公司 | Copper powder composite material for train brake pad and preparation method thereof |
| CN113327775A (en) * | 2021-05-28 | 2021-08-31 | 河北工业大学 | Preparation method of potassium ion micro hybrid capacitor and electrode material |
| CN114672132A (en) * | 2022-04-29 | 2022-06-28 | 福州大学 | High-performance copper-free resin-based brake material prepared from fly ash hollow microspheres |
| CN114688191A (en) * | 2022-03-23 | 2022-07-01 | 北京理工大学珠海学院 | Copper-free brake pad friction material, preparation method and brake pad |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3959194A (en) * | 1972-10-31 | 1976-05-25 | Johns-Manville Corporation | Less abrasive composition railroad brake shoe material |
| JPH02219888A (en) * | 1989-02-21 | 1990-09-03 | Hitachi Chem Co Ltd | Friction material composition and preparation of friction material using same composition |
| JPH04106183A (en) * | 1990-08-27 | 1992-04-08 | Nisshinbo Ind Inc | Non-asbestos friction material |
| CN102191016A (en) * | 2011-05-21 | 2011-09-21 | 瑞阳汽车零部件（仙桃）有限公司 | Copper-free friction material composition for brake pads |
| CN102250583A (en) * | 2011-05-21 | 2011-11-23 | 瑞阳汽车零部件（仙桃）有限公司 | Less-copper friction material composition for brake block |
| CN103992769A (en) * | 2014-05-05 | 2014-08-20 | 浙江杭摩欧亿汽车零部件有限公司 | Copper-free high-performance environment-friendly type friction material for saloon car and preparation method thereof |
| CN104214249A (en) * | 2014-07-05 | 2014-12-17 | 黄惠娟 | Ceramic brake block |
-
2015
- 2015-11-24 CN CN201510822623.1A patent/CN106051001B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3959194A (en) * | 1972-10-31 | 1976-05-25 | Johns-Manville Corporation | Less abrasive composition railroad brake shoe material |
| JPH02219888A (en) * | 1989-02-21 | 1990-09-03 | Hitachi Chem Co Ltd | Friction material composition and preparation of friction material using same composition |
| JPH04106183A (en) * | 1990-08-27 | 1992-04-08 | Nisshinbo Ind Inc | Non-asbestos friction material |
| CN102191016A (en) * | 2011-05-21 | 2011-09-21 | 瑞阳汽车零部件（仙桃）有限公司 | Copper-free friction material composition for brake pads |
| CN102250583A (en) * | 2011-05-21 | 2011-11-23 | 瑞阳汽车零部件（仙桃）有限公司 | Less-copper friction material composition for brake block |
| CN103992769A (en) * | 2014-05-05 | 2014-08-20 | 浙江杭摩欧亿汽车零部件有限公司 | Copper-free high-performance environment-friendly type friction material for saloon car and preparation method thereof |
| CN104214249A (en) * | 2014-07-05 | 2014-12-17 | 黄惠娟 | Ceramic brake block |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678215A (en) * | 2016-12-20 | 2017-05-17 | 佛山市恒学科技服务有限公司 | Multi-dimensional composite high-strength brake pad |
| CN109226712A (en) * | 2018-11-05 | 2019-01-18 | 佛山市南海镕信金属制品有限公司 | A kind of die casting machine clout waste material recovery device and treatment process |
| CN109704638A (en) * | 2018-12-25 | 2019-05-03 | 桐庐宇鑫汽配有限公司 | A kind of brake spacer for automobile |
| CN109704638B (en) * | 2018-12-25 | 2021-03-26 | 桐庐宇鑫汽配有限公司 | Brake lining for automobile |
| CN109737160A (en) * | 2019-02-22 | 2019-05-10 | 中国科学院兰州化学物理研究所 | A kind of modification phenolic resin-based brake block friction material and preparation method thereof |
| CN109737160B (en) * | 2019-02-22 | 2020-02-18 | 中国科学院兰州化学物理研究所 | Modified phenolic resin-based brake pad friction material and preparation method thereof |
| CN112762119A (en) * | 2020-12-22 | 2021-05-07 | 中山市赛福特汽车配件有限公司 | Preparation method of brake pad with good heat fading resistance effect |
| CN113294464A (en) * | 2021-05-26 | 2021-08-24 | 广西荣昇新材料有限公司 | Copper powder composite material for train brake pad and preparation method thereof |
| CN113327775A (en) * | 2021-05-28 | 2021-08-31 | 河北工业大学 | Preparation method of potassium ion micro hybrid capacitor and electrode material |
| CN113327775B (en) * | 2021-05-28 | 2022-04-29 | 河北工业大学 | Preparation method of potassium ion micro hybrid capacitor and electrode material |
| CN114688191A (en) * | 2022-03-23 | 2022-07-01 | 北京理工大学珠海学院 | Copper-free brake pad friction material, preparation method and brake pad |
| CN114672132A (en) * | 2022-04-29 | 2022-06-28 | 福州大学 | High-performance copper-free resin-based brake material prepared from fly ash hollow microspheres |
| CN114672132B (en) * | 2022-04-29 | 2023-06-09 | 福州大学 | High-performance copper-free resin-based braking material prepared from coal ash hollow microspheres |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106051001B (en) | 2018-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106051001A (en) | Environmentally friendly three-dimensional composite reinforced organic brake pad and preparation technology thereof | |
| CN104533998A (en) | Non-asbestos micro-metal mineral fiber disk type brake block for automobile | |
| CN1258050C (en) | Automotiv non-asbestos high strength braking friction disk, and its prodn. method | |
| CN101033785A (en) | Asbestos-free metal-free drum brake lining used in vehicle and manufacture method therefor | |
| CN103016576B (en) | Forklift drum brake lining assembly | |
| CN101759958B (en) | Enhanced ceramic friction material and preparation method thereof | |
| CN103256325B (en) | Vibration damping de-noising driftage low speed brake rim and preparation method thereof | |
| CN105909704B (en) | A kind of composite brake sheet of fine heat radiation property | |
| CN103122959B (en) | High-temperature wear-resisting ceramic composite fiber brake block | |
| CN101886681B (en) | Wavelike bilayer structure drum brake shoe, backing material formula and production process thereof | |
| CN106674883A (en) | Composite brake pad with stable performance | |
| CN103320092B (en) | Method for preparing wet friction material of nano silicon carbide modified carbon cloth | |
| CN103351844B (en) | A kind of Environment-friendlynoise-free noise-free brake block and working method thereof | |
| CN101158382A (en) | High temperature resistant environment-friendly type high performance disc type brake block and producing method thereof | |
| CN104405804A (en) | Mineral fiber and carbon fiber automobile brake pad and preparation method thereof | |
| CN101514251B (en) | Vehicle braking composite material reinforced by confusion of natural fiber and crystal whisker and preparing method thereof | |
| CN105387107A (en) | Novel environment-friendly noise-free brake pad and machining method thereof | |
| CN103836094B (en) | A kind of Pueraria lobata fiber reinforcement environment-friendly type high performance brake block and preparation method thereof | |
| CN106641049A (en) | Method for preparing brake pad from basalt fiber | |
| CN103821852A (en) | Environment-friendly brake pad adopting copper-free microcrystalline friction materials | |
| CN102329980A (en) | Copper-based powder alloy brake material and preparation method for brake pad | |
| CN105402292A (en) | Automobile brake pad and preparation method thereof | |
| CN105443601A (en) | High-performance clutch plate for heavy truck | |
| CN105884252A (en) | Manufacturing process and method of abrasion-resisting lining part | |
| CN101876353B (en) | Clutch facing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |