CN101813148B - Low-metal ceramic-based air-pressure disk type brake pad and preparation method thereof - Google Patents
Low-metal ceramic-based air-pressure disk type brake pad and preparation method thereof Download PDFInfo
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- CN101813148B CN101813148B CN2010101779950A CN201010177995A CN101813148B CN 101813148 B CN101813148 B CN 101813148B CN 2010101779950 A CN2010101779950 A CN 2010101779950A CN 201010177995 A CN201010177995 A CN 201010177995A CN 101813148 B CN101813148 B CN 101813148B
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Abstract
The invention discloses a low-metal ceramic-based air-pressure disk type brake pad and a preparation method thereof. The low-metal ceramic-based air-pressure disk type brake pad comprises the following materials according to a formula by weight percent: 15 to 25 of ceramic adhesive, 0 to 5 of phenolic resin, 10 to 30 of non-metal assorted fibre, 10 to 25 of metal fibre, 10 to 30 of frictional property regulator, 0 to 20 of elastic flexibilizer and 10 to 20 of filler. The preparation method comprises the following production flows of: firstly, weighing sequentially, putting into a high-speed mixer, mixing evenly, then pressing according to the dry-method one-time forming process of a traditional resin-based friction material, carrying out thermosetting treatment, machining, carrying out ceramic treatment, inspecting and finally packaging. The low-metal ceramic-based air-pressure disk type brake pad prepared according to the process has larger braking moment, comfortable and stable emergency braking, no obvious degeneracy, no noise, little falling ashes, simple production process, environmental protection and extensive market prospect and is especially suitable for an air-pressure disk brake of a city bus.
Description
Technical field
The present invention relates to a kind of air-pressure disk type brake pad, particularly relate to a kind of low-metal ceramic-based brake block that is used for passenger vehicle air-pressure disc type brake system, the invention still further relates to the preparation method of this brake block.
Background technique
From technical standpoint, automobile brake utilizes friction to convert kinetic energy to heat energy exactly, makes automobile lose kinetic energy and stops.And these heat energy are mainly all being concentrated on the break, cause heat fade.This situation is particularly evident on drum brake, this be since the structures shape of drum brake its thermal diffusivity relatively poor.In growing apart from braking process, the temperature of break can rise to 500～700 ℃, even higher.The heat fade meeting causes brake performance sharply to descend, even the braking function inefficacy, thereby accidents caused.
For improving the braking ability of commercial car, air-pressure disc brake has been developed in Europe.From the seventies in last century, disk type braker begins small lot use on passenger vehicle and truck, and the nineties begins, and disk type braker obtains high volume applications, and nearly all new Heavy Duty Commercial Car has all adopted air-pressure disc brake in Europe at present.And in China, except the minority coach luxury coach begins to adopt air-pressure disc brake, most commercial car are all used drum brake.
As everyone knows, China is the state on mountain more than, 2nd/3rd of eastern region, and hills and mountain area, Midwest then mountain are higher, and the road is steeper, and landforms of China and road conditions require just more harsh to the heat fade performance of the braking system of automobile.In view of the heat resistanceheat resistant of air-pressure disc brake excellence decline property, we can say that the application of disk type braker is the effective ways that solve the malfunctioning problem of automobile brake that China's vehicle causes in the continuous descending process of mountain road.
The trend that disk type braker replaces drum brake gradually is irreversible.
The air-pressure disk type brake pad of main flow adopts semimetal or few metal-resin base frication material more in the market.Prescription characteristics from brake block, the temperature on brake block and brake disc surface is up to 500～700 ℃ during automobile brake, because resin base brake block heat resistance is not good enough, at high temperature can decompose and emit water, gas, wet goods, form thin film at friction surface, make dry friction become mixed friction or wet friction, friction factor significantly reduces, the hidden danger that exists brake to lose efficacy, simultaneously because a large amount of thermolysiss of resin, reduced its cementation, material at high temperature wearing and tearing aggravation causes significantly reduce the working life of brake block.Some ceramic automobile brake blocks on the market adopt the ceramic fiber of more amount to substitute traditional Steel Fibre at present, although its braking comfort property (comprise noise, fall ash and with the antithesis matching etc.) obviously improve, but owing to still adopt resin, caused it to have the elevated temperature heat decline and at high temperature very easily cracked and problems such as high-temperature wear behavior is relatively poor as main Bond.
Summary of the invention
First technical problem to be solved by this invention provides the long service life that is applicable to the requirement of passenger vehicle disk type braker, the low-metal ceramic-based air-pressure disk type brake pad that braking is sensitive, travelling comfort is good.
Second technical problem to be solved by this invention provides a kind of preparation method of this low-metal ceramic-based air-pressure disk type brake pad.
In order to solve above-mentioned first technical problem, low-metal ceramic-based air-pressure disk type brake pad provided by the invention, its material prescription is by weight percentage: vitrified bond 15～25, phenolic resin 0～5, nonmetal mixed fibre 10～30, steel fiber 10～25, frictional property regulator 10～30, elasticity plasticizer 0～20, filler 10～20, wherein: described vitrified bond is meant silicate; Described phenolic resin is cashew nut shell liquid modified resin, mainly plays additional adhesive, and described nonmetal mixed fibre mainly comprises aramid fiber slurry pool, carbon fiber, ceramic fiber etc., and described steel fiber is made up of Steel Fibre, red copper cotton; Described frictional property regulator mainly comprises chromite, zirconium oxide, graphite etc.; Described elasticity plasticizer is made up of acrylonitrile-butadiene rubber powder, friction powder, and its weight proportion is an acrylonitrile-butadiene rubber powder: friction powder=1: 1; Described filler is made up of barite, Paris white, and its weight proportion is a blanc fixe: Paris white=1: 1.。
Its material prescription count by weight percentage into:
Vitrified bond 15～25, aramid fibre pulp 0～5,
Carbon fiber 0～5, ceramic fiber 10～20,
Steel Fibre 10～20, red copper cotton 0～5,
Chromite 0～5, zirconium oxide 0～5,
Graphite 10～20, nitrile butadiene rubber 0～10
Friction powder 0～10, blanc fixe 5～10
Paris white 5～10, phenolic resin 0～5.
In order to solve above-mentioned second technical problem, the preparation method of low-metal ceramic-based air-pressure disk type brake pad provided by the invention comprises the steps:
(1), batch mixing: the order that load weighted each material is dropped in the high speed mixer is: earlier nonmetal, compound fibric, frictional property regulator are carried out premixing, guarantee that composite fiber is in homogeneously dispersed state, add other raw and auxiliary material then, evenly stir;
(2), hot pressing: pressing pressure 200～300kgf/cm
2, 150～160 ℃ of hot pressing temperatures, exhaust 5～8 times, the dwell time decides according to the thickness of brake block, generally is 55～65s/mm;
(3), the brake block after the moulding was warmed up to 200～220 ℃ at 5～7 hours from room temperature, be incubated 4～8 hours, cool to room temperature then with the furnace;
(4), the brake block after the heat treatment is carried out plain grinding, boring by technical requirements, under 300～400 ℃ temperature, carry out ceramic treatment then, spraying, seal mark, check, packing.
The low-metal ceramic-based air-pressure disk type brake pad that adopts technique scheme to make has that braking moment is big, emergency braking is comfortable steadily, does not have obviously decline, noise free, falls that ash and production technology are simple, environmental protection less.
In sum, the low-metal ceramic-based air-pressure disk type brake pad that makes according to described technology has that braking moment is big, emergency braking is comfortable steadily, does not have obviously decline, noise free, fall ash and production technology is simple less, environmental protection, be specially adapted to the city bus air-pressure disc brake, have vast market prospect.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
The dispensing information of low-metal ceramic-based air-pressure disk type brake pad provided by the invention
Sodium aluminosilicate 15, aramid fibre pulp 2,
Carbon fiber 5, ceramic fiber 20,
Steel Fibre 10, red copper cotton 5,
Chromite 5, zirconium oxide 5,
Graphite 10, nitrile butadiene rubber 5
Friction powder 3, blanc fixe 5
Paris white 5, phenolic resin 5.
In this formula system, described ceramic matrix is meant inorganic high-temperature agglomerants such as sial salt, metal sulfide, can significantly improve the heat resistance of material, reduce material wear extent at high temperature, also can make simultaneously material form porous structure, increase the braking stationarity, reduce brake noise, the vitrified bond that adopts in the present embodiment is a sodium aluminosilicate.For continuing to continue to use the moulding process and the manufacturing mechanism of resin base automobile brake sheet, add a spot of resin and rubber, drop into and cost of production with reduction equipment.Mineral fibre has advantages such as serviceability temperature height, humidity resistance is good, wearing and tearing are little, and can play the effect that the brake travelling comfort is strengthened and improved to microcosmic.During graphite is used as, low temperature lubricant, form the antifriction film at material surface, can increase the braking stationarity, reduce wearing and tearing, increase the service life.Chromite can improve friction factor, increases Braking efficiency.Barite, Paris white etc. are except that playing the effect that reduces cost, and the porosity ratio of can also stablize friction factor, regulating material improves the brake travelling comfort.
Preparation process's explanation of low ceramet group automobile brake block comprises the steps:
(1), batch mixing: the order that load weighted each material is dropped in the high speed mixer is: earlier nonmetal, compound fibric, frictional property regulator are carried out premixing, guarantee that composite fiber is in homogeneously dispersed state, add other raw and auxiliary material then, evenly stir;
(2), hot pressing: pressing pressure 300kgf/cm
2, 150 ℃ of hot pressing temperatures, exhaust 5 times, the dwell time is 55s/mm;
(3), the brake block after the moulding was warmed up to 210 ℃ at 6 hours from room temperature, be incubated 4 hours, cool to room temperature then with the furnace;
(4), the brake block after the heat treatment is carried out plain grinding, boring by technical requirements, under 300 ℃ temperature, carry out ceramic treatment then, spraying, seal mark, check, packing.
The performance of low-metal ceramic-based air-pressure disk type brake pad
Respectively low-metal ceramic-based brake block sample and the exemplar of Wuhan Yuan Feng DR01 are tested and estimated by GB5763-2008, QC/T479-1999 and QC/T239-1997, experimental result sees Table 1 and table 2.
Table 1DR01 sample constant speed survey report
Table 2DR01 exemplar is at Wuhan Yuan Feng air-pressure disc brake survey report
Subordinate list one: potency test key data
Subordinate list two: heat fade and recovery test key data
Sheet in three: 1 friction plate average abrasions of subordinate list amount: 0.34mm outer plate: 0.31mm
2 brake noises: do not have
Friction plate model: DR01 manufacturer: the rich cloud exemplar test in Hunan coupling air chamber: 24 '
The result shows, the braking moment of low-metal ceramic-based air-pressure disk type brake pad is big, stationarity is higher, and there is not obviously decline, friction factor maintains 0.36～0.41, braking moment maintains 20000～24000Nm, wear extent is 0.3mm, and the wear extent of antithesis is less than 0.01mm, complete, the less ash that falls of Friction Disk Surface, does not have collapse limit, flawless.
In addition, by tribology as can be known, the surface abrasion amount of friction plate and the relation between the Vehicle-Miles of Travel are obeyed the monobasic linear rule in the proper functioning phase, promptly
W＝ωL
In the formula: the total abrasion amount of W-: ω-unit stroke wear extent: L-Vehicle-Miles of Travel
Along with the continuous increase of the distance travelled of vehicle, the wearing and tearing of disk brake friction wafer are increasing, when thickness during near wear limit, concerning the driving safety of passenger vehicle, just constitute a kind of serious threat.Therefore, we are converted into the permission wear extent of friction plate the distance travelled of vehicle with the thickness of a disk brake friction wafer important indicator as the control bus safety.
The drag friction car sheet that the 20mm that adopts the present invention to make is thick leads to company's trial assembly through the Zhengzhou space, and unit stroke wear extent is about 0.0003mm/km, and general operating limit is 4mm, is about 53000km thus the working life of definite this friction plate.
Embodiment 2:
The dispensing information of low-metal ceramic-based air-pressure disk type brake pad provided by the invention
Sodium aluminosilicate 17, aramid fibre pulp 5,
Carbon fiber 5, ceramic fiber 10,
Steel Fibre 15, red copper cotton 5,
Chromite 5, zirconium oxide 0,
Graphite 10, nitrile butadiene rubber 3
Friction powder 2, blanc fixe 10,
Paris white 10, phenolic resin 3.
Preparation process's explanation of low ceramet group automobile brake block comprises the steps:
(1), batch mixing: the order that load weighted each material is dropped in the high speed mixer is: earlier nonmetal, compound fibric, frictional property regulator are carried out premixing, guarantee that composite fiber is in homogeneously dispersed state, add other raw and auxiliary material then, evenly stir;
(2), hot pressing: pressing pressure 200kgf/cm
2, hot pressing temperature 160, exhaust 8 times, the dwell time is 65s/mm;
(3), the brake block after the moulding was warmed up to 220 at 5 hours from room temperature, be incubated 8 hours, cool to room temperature then with the furnace;
(4), the brake block after the heat treatment is carried out plain grinding, boring by technical requirements, under 400 temperature, carry out ceramic treatment then, spraying, seal mark, check, packing.
The performance of low-metal ceramic-based air-pressure disk type brake pad
By GB5763-2008 the low-metal ceramic-based brake block sample of Wuhan Yuan Feng DR01 is tested and estimated, experimental result sees Table 3.
Table 3DR01 sample constant speed survey report
Embodiment 3:
The dispensing information of low-metal ceramic-based air-pressure disk type brake pad provided by the invention
Sodium aluminosilicate 25, aramid fibre pulp 0,
Carbon fiber 2, ceramic fiber 20,
Steel Fibre 20, red copper cotton 0,
Chromite 3, zirconium oxide 5,
Graphite 10, nitrile butadiene rubber 3
Friction powder 2, blanc fixe 5,
Paris white 5, phenolic resin 0
Preparation process's explanation of low ceramet group automobile brake block comprises the steps:
(1), batch mixing: the order that load weighted each material is dropped in the high speed mixer is: earlier nonmetal, compound fibric, frictional property regulator are carried out premixing, guarantee that composite fiber is in homogeneously dispersed state, add other raw and auxiliary material then, evenly stir;
(2), hot pressing: pressing pressure 200kgf/cm
2, hot pressing temperature 160, exhaust 8 times, the dwell time is 65s/mm;
(3), the brake block after the moulding was warmed up to 220 at 5 hours from room temperature, be incubated 8 hours, cool to room temperature then with the furnace;
(4), the brake block after the heat treatment is carried out plain grinding, boring by technical requirements, under 400 temperature, carry out ceramic treatment then, spraying, seal mark, check, packing.
The performance of low-metal ceramic-based air-pressure disk type brake pad
By GB5763-2008 the low-metal ceramic-based brake block sample of Wuhan Yuan Feng DR01 is tested and estimated, experimental result sees Table 4.
Table 4DR01 sample constant speed survey report
Embodiment 4:
The dispensing information of low-metal ceramic-based air-pressure disk type brake pad provided by the invention
Sodium aluminosilicate 20, aramid fibre pulp 3,
Carbon fiber 2, ceramic fiber 10,
Steel Fibre 10, red copper cotton 5,
Chromite 5, zirconium oxide 5,
Graphite 20, nitrile butadiene rubber 3
Friction powder 2, blanc fixe 5,
Paris white 5, phenolic resin 5
Preparation process's explanation of low ceramet group automobile brake block comprises the steps:
(1), batch mixing: the order that load weighted each material is dropped in the high speed mixer is: earlier nonmetal, compound fibric, frictional property regulator are carried out premixing, guarantee that composite fiber is in homogeneously dispersed state, add other raw and auxiliary material then, evenly stir;
(2), hot pressing: pressing pressure 200kgf/cm
2, hot pressing temperature 160, exhaust 8 times, the dwell time is 65s/mm;
(3), the brake block after the moulding was warmed up to 220 at 5 hours from room temperature, be incubated 8 hours, cool to room temperature then with the furnace;
(4), the brake block after the heat treatment is carried out plain grinding, boring by technical requirements, under 400 temperature, carry out ceramic treatment then, spraying, seal mark, check, packing.
The performance of low-metal ceramic-based air-pressure disk type brake pad
By GB5763-2008 the low-metal ceramic-based brake block sample of Wuhan Yuan Feng DR01 is tested and estimated, experimental result sees Table 5.
Table 5DR01 sample constant speed survey report
Claims (3)
1. low-metal ceramic-based air-pressure disk type brake pad, it is characterized in that: its material prescription is by weight percentage: vitrified bond 15～25, phenolic resin 0～5, nonmetal mixed fibre 10～30, steel fiber 10～25, frictional property regulator 10～30, elasticity plasticizer 0～20, filler 10～20, wherein: described vitrified bond is meant silicate; Described phenolic resin is cashew nut shell liquid modified resin, and described nonmetal mixed fibre comprises aramid fiber slurry pool, carbon fiber, ceramic fiber, and described steel fiber is made up of Steel Fibre, red copper cotton; Described frictional property regulator comprises chromite, zirconium oxide, graphite; Described elasticity plasticizer is made up of acrylonitrile-butadiene rubber powder, friction powder, and its weight proportion is an acrylonitrile-butadiene rubber powder: friction powder=1: 1; Described filler is made up of barite, Paris white, and its weight proportion is a blanc fixe: Paris white=1: 1.
2. low-metal ceramic-based air-pressure disk type brake pad according to claim 1 is characterized in that: its material prescription count by weight percentage into:
Vitrified bond 15～25, aramid fibre pulp 0～5,
Carbon fiber 0～5, ceramic fiber 10～20,
Steel Fibre 10～20, red copper cotton 0～5,
Chromite 0～5, zirconium oxide 0～5,
Graphite 10～20, nitrile butadiene rubber 0～10
Friction powder 0～10, blanc fixe 5～10
Paris white 5～10, phenolic resin 0～5.
3. prepare the method for the described low-metal ceramic-based air-pressure disk type brake pad of claim 1, it is characterized in that: comprise the steps:
(1), batch mixing: the order that load weighted each material is dropped in the high speed mixer is: earlier nonmetal, compound fibric, frictional property regulator are carried out premixing, guarantee that composite fiber is in homogeneously dispersed state, add other raw and auxiliary material then, evenly stir;
(2), hot pressing: pressing pressure 200～300kgf/cm
2, 150～160 ℃ of hot pressing temperatures, exhaust 5～8 times, the dwell time decides according to the thickness of brake block, and the dwell time is 55～65s/mm;
(3), the brake block after the moulding was warmed up to 200～220 ℃ at 5～7 hours from room temperature, be incubated 4～8 hours, cool to room temperature then with the furnace;
(4), the brake block after the heat treatment is carried out plain grinding, boring by technical requirements, under 300～400 ℃ temperature, carry out ceramic treatment then, spraying, seal mark, check, packing.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012088637A1 (en) * | 2010-12-30 | 2012-07-05 | 湖南博云汽车制动材料有限公司 | Low metal ceramic based automobile friction material and production method thereof |
| CN102382626A (en) * | 2011-08-25 | 2012-03-21 | 东营博瑞制动系统有限公司 | Formula of carbon fiber based friction material and manufacturing method thereof |
| CN104315045A (en) * | 2014-09-16 | 2015-01-28 | 湖南博云汽车制动材料有限公司 | Low-cost low-noise semimetal disc type brake pad and preparation method thereof |
| CN106246774A (en) * | 2016-07-27 | 2016-12-21 | 广西驰胜农业科技有限公司 | A kind of carbon fibre resin base frication material and preparation method thereof |
| CN108395669A (en) * | 2018-03-12 | 2018-08-14 | 苏州甫众塑胶有限公司 | A kind of preparation method of rubber and plastic hybrid motor brake pad material |
| CN114151481B (en) * | 2021-12-02 | 2023-06-09 | 安徽飞鹰汽车零部件股份有限公司 | Large-plate special-shaped friction plate for engineering machinery, preparation method and mold |
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| CN1421504A (en) * | 2002-12-19 | 2003-06-04 | 中国科学院兰州化学物理研究所 | Adhesive for brake block of oil field drilling machine |
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| CN1690467A (en) * | 2004-04-26 | 2005-11-02 | 徐松波 | Asbestos-free low metal content automobile brake lining |
| CN101113204A (en) * | 2007-07-17 | 2008-01-30 | 李军魂 | Formula of ceramic radical friction material for automobile braking friction facing |
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2010
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4954536A (en) * | 1988-04-20 | 1990-09-04 | Tokico Ltd. | Brake-friction material |
| CN1053951C (en) * | 1996-05-10 | 2000-06-28 | 董文瑞 | Brake pad and preparation method thereof |
| CN1431408A (en) * | 2001-11-22 | 2003-07-23 | 中国科学院山西煤炭化学研究所 | Disk type brake lining of cars and its preparing method |
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| CN101113204A (en) * | 2007-07-17 | 2008-01-30 | 李军魂 | Formula of ceramic radical friction material for automobile braking friction facing |
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