CN102766436B - New friction material and application thereof - Google Patents
New friction material and application thereof Download PDFInfo
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- CN102766436B CN102766436B CN201210239614.6A CN201210239614A CN102766436B CN 102766436 B CN102766436 B CN 102766436B CN 201210239614 A CN201210239614 A CN 201210239614A CN 102766436 B CN102766436 B CN 102766436B
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Abstract
The invention discloses a new friction material and application thereof. The new friction material comprises 14 percent of resin, 20 percent of elastic friction granules, 9 percent of graphite, 7 percent of ceramic fibers, 3 percent of tire powder, 8 percent of glass fibers, 5 percent of vermiculite, 7 percent of coke, 8 percent of barite powder, 3 percent of mica, 8 percent of wollastonite, 3 percent of zircon powder and 5 percent of talcpowder. A brake block manufactured by utilizing the new friction material has stable friction coefficients and high abrasive resistance, so that the using safety is improved, and the service life is prolonged; and the new friction material can improve the toughness of the brake block, so that the braking noise is reduced, and the comfort of a brake is improved.
Description
Technical field
The present invention relates to a kind of friction material, particularly relate to a kind of friction material for vehicle brake-holder block and application thereof.
Background technique
Friction material is that one is applied on dynamic power machine, relies on rubbing action to perform the component materials of braking and transmission agency.It mainly comprises brake facing (brake block) and clutch surface (clutch plate).Brake block is used for braking, and clutch plate is used for transmission.The various vehicles of any machinery and motion all must have to be braked or transmission device.Friction material is the critical piece on this braking or transmission device.Its topmost function absorbs or transferring power by rubbing.As clutch plate transferring power, braking plate absorbs kinetic energy.They enable machinery and various motor vehicle work safely and reliably.Friction material is that one is widely used and very crucially material thus.
The friction material of current industry belongs to macromolecule trielement composite material, and it comprises three parts: with polymeric compound be Bond, with inorganic or organic fiber be strengthen component, be frictional property regulator or compounding ingredient with filler.
1 Bond: friction material organic binder used is phenolic resinoid and synthetic rubber, and based on phenolic resinoid.Their feature and effect first then enter viscous state in softening when being under certain heating-up temperature, produce and flow and be uniformly distributed the matrix forming material in the material, finally by the vulcanization of resin solidification effect, fiber and filler are bonded together, and what form quality densification has suitable intensity and can meet the friction plate goods that friction material usability requires.
For friction material, the heat resistance of resin and rubber is very important performance index.Because vehicle and machinery are when carrying out braking and transmission work, under friction plate is in the worst hot case condition of 200 DEG C ~ about 450 DEG C.In this temperature range, the major component of fiber and filler is inorganic type, thermolysis can not occur.And for resin and rubber, organic, enter again thermolysis region.The property indices of friction material is now many can there is disadvantageous change (friction factor, wearing and tearing, mechanical strength etc.), particularly friction material is detecting and three heat (heat fade, thermal expansion, the heat crack) phenomenon that occurs in using process, and its root is all cause due to the thermolysis of resin and rubber, organic.Therefore resin and the performance of rubber to friction material is selected to have very important effect.Select different Bonds will draw different frictional behaviours and structural behaviour.Current use phenolic resin and modified resin thereof.As: cashew nut oil modified, butyronitrile powder modification, modified rubber and other phenol-formaldehyde resin modified are as the Bond of friction material.
To the quality requirement of resin be:
(1) good heat resistance, has good heat decomposition temperature and lower thermal weight loss.
(2) powdered resin fineness wants high, is generally 100 order ~ 200 orders, preferably more than 200 orders, is conducive to the uniformity of batch mixing dispersion, can reduces the consumption of resin in formula.
(3) free phenol content is low, is advisable with 1% ~ 3%.
(4) suitable curing rate 40s ~ 60s (150 DEG C) and flow distance (120 DEG C of 40 ~ 80mm).
2 reinforcing fibers: fibre reinforced materials forms the base material of friction material, its gives friction goods enough mechanical strength, can bear the impact force, shearing force, the pressure that produce due to braking and transmission in the load forces of friction plate grinding in process of production and riveted joint processing and using process.
China's related standards and automobile factory, according to the actual applying working condition condition of friction plate, propose corresponding requirement of mechanical strength to friction plate.As: impact strength, resistance to flexure, compressive strength, shear strength etc.In order to meet these strong performance requirements, need to select suitable fiber species to increase, meet strength character.
Friction material requires its fiber fraction used:
(1) strengthen effective.
(2) good heat resistance.Can not fuse at friction operation temperature, carbonization and thermolysis phenomenon.
(3) there is basic friction factor.
(4) hardness is unsuitable too high, in order to avoid produce brake noise and damage brake disc or drum.
(5) process operability is good.
3 fillers: the filler in friction material constituents, are mainly made up of frictional property regulator and compounding ingredient.Use the object of filler, mainly contain the following aspects:
(1) regulate and improve the frictional behaviour of goods, physical property and mechanical strength.
(2) control goods thermal expansion coefficient, thermal conductivity, shrinkage, increase the stability of product size.
(3) brake noise of goods is improved.
(4) manufacturing process performance and the processibility of goods is improved.
(5) products appearance quality and density is improved.
(6) cost of production is reduced.
When the formula Design of friction material, select the performance that filler must understand filler and the effect played in the various characteristics of friction material.Proper use of filler determines the performance of friction material, manufacturing process is also very important.
According to the effect of frictional property regulator in friction material, " increasing mill filler " and " anti-attrition filler " two classes can be divided into.Friction material itself belongs to friction resistance material, and for performing braking and transmission agency requires to have higher friction factor, therefore the increasing filler that rubs is the main component of frictional property regulator.The increasing effect of rubbing of different filler is different.
The Mohs hardness increasing the filler that rubs is generally 3 ~ 9.The increasing that hardness the is high Be very effective that rubs is obvious.Fillers more than 5.5 hardness belongs to hard filler, but will control its consumption, granularity.(as aluminium oxide, zircon etc.)
Anti-attrition filler: be generally low hardness material, lower than the mineral of Mohs hardness 2.As: graphite, molybdenum disulfide, French chalk, mica etc.It can reduce the wearing and tearing that friction factor can reduce again mating material, thus improves the working life of friction material.
Friction material is a kind of special material worked in heat with the environment of elevated pressures, and therefore just require that filler composition used must have good heat resistance, i.e. thermostability, comprises ermal physics effect and thermochemistry effect etc.
The packing density of filler is very large to the performance impact of friction material.The different performance requirement of friction material is also different to the requirement of the packing density of filler.
Current friction material manufacturing process is complicated, requires high, and then cause cost high to the component property of material; And the general friction material of industry adopts is all the intrinsic colour of material, resolution is not high.
Summary of the invention
The object of the invention is to for above-mentioned the deficiencies in the prior art, provide a kind of and can improve material safety and life-span and the friction material reduced costs and application thereof.
Technological scheme of the present invention is achieved in that
A kind of technological scheme: a kind of new friction material, it comprises resin 14%, elastic-friction particle 20%, graphite 9%, ceramic fiber 7%, tyre talc 3%, glass fibre 8%, vermiculite 5%, coke 7%, blanc fixe 8%, mica 3%, wollastonite 8%, zirconium English powder 3%, French chalk 5%.
Described elastic-friction particle comprises green elastic-friction particle 12%, yellow elastic friction particles 5% and red elastic-friction particle 3%.
Described resin is phenolic resin.
Another kind of technological scheme: a kind of method using above-mentioned new friction material to manufacture braking plate, it comprises the following steps:
1) electronic scale is used to prepare burden to each component by the proportion in claim 1;
2) each component after preparing is dropped into stirrer to stir, and with circulating water, stirrer is cooled, finally form mixture;
3) elder generation's brush demoulding water on liner plate, then mixture and liner plate is loaded in shaping mold cavity, mould-cavity temperature controls, at 135-145 DEG C, then to pressurize to die cavity, and force value is 240-300kg/cm2;
4) after pressurization stops, then follow procedure is exitted 3 times, then pressurize, and the dwell time is 60 seconds, forms braking plate;
5) braking plate after hot-forming is pushed in baking oven heat-treat.
Described 1) error that each component batching in terminates rear total amount is no more than 0.4kg.
Described 2) stirrer in adopts high-speed cooking pot stirrer, mixing time every pot 3 minutes; Or adopt plough type stirrer, mixing time every pot 8 minutes.
Described 4) the venting first time in continues 12 seconds, and second time and third time all continue 15 seconds.
Described 5) the heat treatment temperature control procedure in is as follows: be first raised to 125 DEG C from 25 DEG C, needs 20 minutes; Then 125 DEG C of insulations 120 minutes; Be raised to 145 DEG C from 125 DEG C, need 20 minutes; 145 DEG C of insulations 180 minutes; Be raised to 155 DEG C from 145 DEG C, need 20 minutes; 155 DEG C of insulations 240 minutes; Be raised to 160 DEG C from 155 DEG C, need 20 minutes; 160 DEG C of insulations 480 minutes; Drop to 100 DEG C from 160 DEG C, need 40 minutes.
Described 5) braking plate after hot-forming in adopts every 5 back-to-back modes to be arranged in chase in the horizontal direction, and in the vertical direction braking plate is staggeredly stacked.
The present invention is by adopting elastic-friction particle as the filler of friction material, reasonably select due to it and coordinate, making new friction material when coming in contact friction with friction pair, there is good laminating, increase friction area and play soft or hard combination, the effect of tempering toughness with gentleness; New friction material makes simple, and cost is low; The braking plate made by this new friction material has stable friction factor and fabulous wear resistance, improves its safety in utilization and life-span; This new friction material can increase the toughness of braking plate, and then reduces brake noise, improves the travelling comfort of brake.
Embodiment
A kind of new friction material of the present invention, it comprises resin 14%, elastic-friction particle 20%, graphite 9%, ceramic fiber 7%, tyre talc 3%, glass fibre 8%, vermiculite 5%, coke 7%, blanc fixe 8%, mica 3%, wollastonite 8%, zirconium English powder 3%, French chalk 5%.Wherein elastic-friction particle comprises green elastic-friction particle 12%, and yellow elastic friction particles 5% and red elastic-friction particle 3%, can change the outward appearance of traditional friction material like this, increases resolution, novel structure.Resin adopts phenolic resin, and its feature and effect first then enter viscous state in softening when being under certain heating-up temperature, produces and flow and be uniformly distributed the matrix forming material in the material, can as the effect of Bond.
A kind of method using above-mentioned new friction material to manufacture braking plate of the present invention, it comprises the following steps:
1) use electronic scale to prepare burden to each component by the proportion in new friction material, the error that each component batching terminates rear total amount is no more than 0.4kg;
2) each component after preparing is dropped into stirrer to stir, need before dosing to check in stirrer whether have residue with discharge port, after cleaning out, open stirrer and open circulating water and stirrer is cooled, stirrer can adopt high-speed cooking pot stirrer or plough type stirrer, the mixing time of corresponding often kind of stirrer be respectively every pot 3 minutes or every pot 8 minutes, finally form mixture in stirrer;
3) elder generation's brush demoulding water on liner plate, then mixture and liner plate is loaded in shaping mold cavity, mould-cavity temperature controls, at 135-145 DEG C, then to pressurize to die cavity, and force value is 240-300kg/cm2;
4) after pressurization stops, then follow procedure is exitted 3 times, and venting first time continues 12 seconds, second time and third time all continue 15 seconds, then pressurize, and the dwell time is 60 seconds, dwell time changes by the thickness of product, within 60 seconds, is the braking plate thickness of manufacturer's standard, finally forms braking plate;
5) every 5 back-to-back modes are adopted to be arranged in chase in the horizontal direction the braking plate after hot-forming, these braking plates of in the vertical direction are staggeredly stacked, then push in baking oven and heat-treat, heat treatment temperature control procedure is as follows: be first raised to 125 DEG C from 25 DEG C, needs 20 minutes; Then 125 DEG C of insulations 120 minutes; Be raised to 145 DEG C from 125 DEG C, need 20 minutes; 145 DEG C of insulations 180 minutes; Be raised to 155 DEG C from 145 DEG C, need 20 minutes; 155 DEG C of insulations 240 minutes; Be raised to 160 DEG C from 155 DEG C, need 20 minutes; 160 DEG C of insulations 480 minutes; Drop to 100 DEG C from 160 DEG C, need 40 minutes.
Test data: detect the braking plate friction factor at different temperature and wear intensity that adopt this new friction material to manufacture, impact: 3.540, hardness HRM:60
| Temperature | Friction factor | Cooling friction factor | Weight wearing and tearing g | Wear rate |
| 100 | 0.4 | 0.43 | 0.03 | 0.06 |
| 150 | 0.4 | 0.42 | 0.04 | 0.08 |
| 200 | 0.41 | 0.41 | 0.08 | 0.1 |
| 250 | 0.41 | 0.39 | 0.11 | 0.13 |
| 300 | 0.36 | 0.36 | 0.14 | 0.17 |
New friction material of the present invention and adopt this friction material to manufacture braking plate, manufacturing process is simple, and cost is low; And in new friction material, increase colored elastic-friction particle, increase resolution, improve outward appearance, novel structure; The braking plate made by testing this new friction material has stable friction factor and fabulous wear resistance, improves its safety in utilization and life-span; This new friction material can increase the toughness of braking plate, and then reduces brake noise, improves the travelling comfort of brake.
Claims (7)
1. a friction material, is characterized in that: comprise resin 14%, elastic-friction particle 20%, graphite 9%, ceramic fiber 7%, tyre talc 3%, glass fibre 8%, vermiculite 5%, coke 7%, blanc fixe 8%, mica 3%, wollastonite 8%, zirconium English powder 3%, French chalk 5%; Described resin is phenolic resin; Described elastic-friction particle comprises green elastic-friction particle 12%, yellow elastic friction particles 5% and red elastic-friction particle 3%.
2. use the friction material described in claim 1 to manufacture a method for braking plate, it is characterized in that: comprise the following steps:
1) electronic scale is used to prepare burden to each component by the proportion in claim 1;
2) each component after preparing is dropped into stirrer to stir, and with circulating water, stirrer is cooled, finally form mixture;
3) elder generation's brush demoulding water on liner plate, then mixture and liner plate is loaded in shaping mold cavity, mould-cavity temperature controls, at 135-145 DEG C, then to pressurize to die cavity, and force value is 240-300kg/cm
2;
4) after pressurization stops, then follow procedure is exitted 3 times, then pressurize, and the dwell time is 60 seconds, forms braking plate;
5) braking plate after hot-forming is pushed in baking oven heat-treat.
3. use the friction material described in claim 1 to manufacture the method for braking plate as claimed in claim 4, it is characterized in that: the error that each component batching described 1) terminates rear total amount is no more than 0.4kg.
4. use the friction material described in claim 1 to manufacture the method for braking plate as claimed in claim 4, it is characterized in that: the stirrer described 2) adopts high-speed cooking pot stirrer, mixing time every pot 3 minutes; Or adopt plough type stirrer, mixing time every pot 8 minutes.
5. use the friction material described in claim 1 to manufacture the method for braking plate as claimed in claim 4, it is characterized in that: the venting first time described 4) continues 12 seconds, and second time and third time all continue 15 seconds.
6. use the friction material described in claim 1 to manufacture the method for braking plate as claimed in claim 4, it is characterized in that: the heat treatment temperature control procedure described 5) is as follows: be first raised to 125 DEG C from 25 DEG C, need 20 minutes; Then 125 DEG C of insulations 120 minutes; Be raised to 145 DEG C from 125 DEG C, need 20 minutes; 145 DEG C of insulations 180 minutes; Be raised to 155 DEG C from 145 DEG C, need 20 minutes; 155 DEG C of insulations 240 minutes; Be raised to 160 DEG C from 155 DEG C, need 20 minutes; 160 DEG C of insulations 480 minutes; Drop to 100 DEG C from 160 DEG C, need 40 minutes.
7. use the friction material described in claim 1 to manufacture the method for braking plate as claimed in claim 8, it is characterized in that: the braking plate after hot-forming described 5) adopts every 5 back-to-back modes to be arranged in chase in the horizontal direction, and in the vertical direction braking plate is staggeredly stacked.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210239614.6A CN102766436B (en) | 2012-07-11 | 2012-07-11 | New friction material and application thereof |
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| CN201210239614.6A CN102766436B (en) | 2012-07-11 | 2012-07-11 | New friction material and application thereof |
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| CN102766436B true CN102766436B (en) | 2015-03-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103195844B (en) * | 2013-04-24 | 2015-06-24 | 江苏普华力拓摩擦材料有限公司 | Novel ceramic brake pad |
| CN105041926A (en) * | 2015-05-21 | 2015-11-11 | 江苏普华力拓摩擦材料有限公司 | Little-dust and low-metal friction material and preparation method thereof |
| CN107664169A (en) * | 2016-07-28 | 2018-02-06 | 常军 | The processing method of automobile brake sheet |
| CN108456358A (en) * | 2018-02-08 | 2018-08-28 | 合肥市大卓电力有限责任公司 | A kind of environmental protection scratch resistant material and preparation method thereof |
| CN111942330B (en) * | 2019-05-17 | 2021-12-14 | 常州中车铁马科技实业有限公司 | Shape-correcting grinder and manufacturing method thereof |
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