CN105086940A - Disk brake pad friction material, disk brake pad and disk brake pad manufacturing technique - Google Patents
Disk brake pad friction material, disk brake pad and disk brake pad manufacturing technique Download PDFInfo
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Abstract
The invention discloses a disk brake pad friction material which is prepared from the following raw materials in percentage by weight: 10-20% of phenolic resin, 1-2% of nitrile-butadiene rubber, 1-2% of hydrogenated nitrile-butadiene rubber, 10-20% of Kevlar fiber, 3-5% of carbon fiber, 8-18% of acicular wollastonite, 7-15% of steel wool, 3-8% of foam iron powder, 7-15% of graphite, 2-5% of titanium alloy, 2-3% of molybdenum disulfide, 0-1.5% of brown fused alumina, 3-5% of vermiculite, 5-15% of cashew nut shell oil friction powder, 15-25% of tire powder and 1-4% of aluminum oxide. Thus, the raw material composition has lower metal content, and is free of asbestos or any copper element. The friction material prepared by the raw material proportioning satisfies the standard for the environment-friendly friction material. The combination of the improved hydrogenated nitrile-butadiene rubber and nitrile-butadiene rubber is utilized to greatly enhance the flexibility and improve the use space and service life of the brake pad. The creative addition of the titanium alloy ensures the waterproof function of the brake pad, thereby prolonging the service life of the brake pad, improving the mixing condition among the components, reducing the dead weight of the brake pad, and having breakthrough meanings.
Description
Technical field
The present invention relates to automotive field, particularly a kind of disc brake pad friction material and a kind of disc brake pad, and disc brake pad manufacturing process.
Background technology
Brake facing is also brake rubber block, and in the brake system of automobile, brake facing is the breaking piece of most critical, plays a decisive role to the quality of braking effect.Brake facing is generally made up of steel plate, bonding thermofin and frictionshoe.Wherein, frictionshoe is made up of friction materials and tackiness agent, and during brake, frictionshoe is compressed on brake flange or brake drum and rubs with its generation, thus reaches the object making vehicle deceleration brake.Visible, friction materials is the integral part very important in manufacturing processed and use procedure of brake facing.
Friction materials can adopt synthetic materials ordinary hot platen press to obtain, and hot pressing temperature is below 200 DEG C.Wherein, the starting material of friction materials are generally divided into binding agent, fortifying fibre, frictional property regulator and filler four most of:
Binding agent is the important constituent element in friction materials, and he can affect the heat fading performance of material, restorability, polishing machine and mechanical property, and general in Automotive Friction Material what adopt is resol;
Fortifying fibre plays toughener in friction materials, traditional material be the mineral fibre such as asbestos, use steel fiber in semi-metal Automotive Friction Material, add a small amount of copper fiber and a small amount of mineral fibre thereof simultaneously;
Frictional property regulator can be divided into two classes, and a class is the antifriction material that Mohs' hardness is generally less than 2, it add the wear resistance that can improve material, reduce noise and reduce frictional coefficient.This kind of material mainly contains: graphite, molybdenumdisulphide, lead and copper etc.; Another kind of frictional property regulator is the friction resistance material that Mohs' hardness is generally greater than 4, it add the frictional coefficient that can increase material;
Filler mainly adds in the form of a powder, and its effect is a lot, such as, add copper powder and can form transfer film between friction materials and antithesis, moment of friction and stable frictional coefficient can be improved, the damage to mating plate can be reduced again, improve the wear resisting property of whole friction pair.
Along with the progress of science and technology and the raising of people's living standard, the environmental requirement of brake facing is also progressively improved.Feasibility study report shows, market abroad, without the Environment protection type friction material of asbestos, few metal, namely without asbestos organic type friction materials, has started to marketing; More American-European countries make laws with regard to the content of noxious heavy metal components and copper in limiting friction material.So at foreseeable future, in friction materials, the content of heavy metal components will become an American-European restriction of trade of friction materials outlet.
Therefore, how to increase brake facing work-ing life and suitable environment, and how to design its manufacturing process be those skilled in the art
Technical problem urgently to be resolved hurrily.
Summary of the invention
In view of this, the brake facing that the invention provides a kind of disc brake pad friction material and make of this friction materials, and the manufacturing process of this brake facing, this kind of friction materials disclosed by the invention meets the standard of Environment protection type friction material.
For achieving the above object, the invention provides following technical scheme:
A kind of disc brake pad friction material, comprises the raw material of following weight part: resol 10-20%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, Kafra fiber 10-20%, carbon fiber 3-5%, acicular wollastonite 8-18%, steel wool 7-15%, foam ferrous powder 3-8%, graphite 7-15%, titanium alloy 2-5%, molybdenumdisulphide 2-3%, Brown Alundum Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-15%, tyre talc 15-25% and aluminum oxide 1-4%.
Preferably, in above-mentioned disc brake pad friction material, comprise the raw material of following weight part: resol 10-15%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, Kafra fiber 10-20%, carbon fiber 3-5%, acicular wollastonite 10-15%, steel wool 8-10%, foam ferrous powder 3-5%, graphite 7-10%, titanium alloy 2-3%, molybdenumdisulphide 2-3%, Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-10%, tyre talc 15-20% and aluminum oxide 1-2%.
Preferably, in above-mentioned disc brake pad friction material, described resol is cashew nut oil modified alkyd resin.
Preferably, in above-mentioned disc brake pad friction material, the processing parameter of described cashew nut oil modified alkyd resin is, 150-200 order, 1.2%≤free phenol content≤2%, 150 DEG C time curing speed 40-60S, 125 DEG C time flow distance 50-60mm;
The processing parameter of described paracril is, 40-60 order, volatile content≤1%, gel content >=70%, bound acrylonitrile content 40 ± 1%;
The processing parameter of described hydrogenated nitrile-butadiene rubber is, 40-60 order, volatile content≤0.8%, gel content >=75%; The processing parameter of described Kafra fiber is, loss on ignition at 800 DEG C and the time be 1h in be not more than 10%, aerated density 0.13-1.20g/cm3, moisture content≤3%, Fibre diameter 0-20um; The processing parameter of described carbon fiber is, staple length 0.5-0.8mm, water content≤5%, proportion 1.3-1.5g/ml; The processing parameter of described acicular wollastonite is sieve 18 orders, length-to-diameter ratio > 15, density 2.6-2.9g/cm3, aerated density 160-200ml/100g;
The processing parameter of described steel wool is, equivalent diameter 40-75um, sieves 14 order 0-1%, 20 order 0-5%, 40 order 5-15%, 70 order 15-30%, 100 order 5-25%, sieve end 45-65%, aerated density 0.8-1.1g/cm
3;
The processing parameter of described graphite is, carbon content >=99%, crystal particle diameter 0.05-1.5mm.
A kind of disc brake pad, comprise brake facing backboard and be compressed on the friction materials on described brake facing backboard, described friction materials is above-mentioned disc brake pad friction material.
A manufacturing process for disc brake pad, comprises the following steps;
Steps A: raw material mixture, prepare the raw material of following weight part: resol 10-20%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, Kafra fiber 10-20%, carbon fiber 3-5%, acicular wollastonite 8-18%, steel wool 7-15%, foam ferrous powder 3-8%, graphite 7-15%, titanium alloy 2-5%, molybdenumdisulphide 2-3%, Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-15%, tyre talc 15-25%, aluminum oxide 1-4%, put it into mixture in mixer after getting out described raw material and evenly become friction materials;
Step B: hot-forming, by described friction materials good for mixture and the brake facing backboard feeding mold pressing procedure being painted with glue, processes the work in-process of disc brake pad;
Step C: solidification treatment, heat-treats baking to described disc brake pad in baking box.
Preferably, in the manufacturing process of above-mentioned disc brake pad, described steps A specifically comprises the following steps:
Steps A 1: by the raw material of following weight part, resol 10-20%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, acicular wollastonite 8-18%, steel wool 7-15%, foam ferrous powder 3-8%, titanium alloy 2-5%, molybdenumdisulphide 2-3%, Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-15%, tyre talc 15-25%, aluminum oxide 1-4%, disposablely put into stirrer, stir 4 to 7 minutes;
Steps A 2: the graphite then adding 7-15% weight part, and stir 1.5 to 3 minutes;
Steps A 3: finally add the Kafra fiber of 10-20% weight part and the carbon fiber of 3-5% weight part, then stir 2 to 4 minutes, make the compound of friction materials.
Preferably, in the manufacturing process of above-mentioned disc brake pad, the processing parameter in described step B when hot-forming is:
Hot pressing temperature 140-160 degree Celsius, the time is 250-300 second, and hot pressing pressure is 15-18MPa.
Preferably, in the manufacturing process of above-mentioned disc brake pad, in described step C to the processing parameter that described disc brake pad heat-treats baking be:
Sintering work in-process toast 1.6 to 2.5 hours at the temperature of 150 to 300 DEG C, then 160-240 DEG C of baking 2 to 3 hours.
As can be seen from above-mentioned technical scheme, in the raw material composition of the disc brake pad friction material that the embodiment of the present invention provides, metal content is lower, and not containing asbestos and any copper, with the friction materials of this kind of proportioning raw materials manufacture, meet the standard of Environment protection type friction material, and the legislation restriction of trade that more American-European countries carry out with regard to the content of noxious heavy metal components and copper in limiting friction material can be broken through, follow-on hydrogenated nitrile-butadiene rubber and paracril is used to combine, substantially increase usage space and the life-span of snappiness and brake facing, the creativeness of titanium alloy adds and makes the water-proof function of brake facing be guaranteed especially, improve work-ing life of brake facing from another point of view and the mixing situation that improve between each component, alleviate brake facing own wt, therefore, the disc brake pad friction material that the visible embodiment of the present invention provides has breakthrough meaning.
Embodiment
The brake facing that the invention discloses a kind of disc brake pad friction material and make of this friction materials, and the manufacturing process of this brake facing, this kind of friction materials disclosed by the invention meets the standard of Environment protection type friction material.
The disc brake pad friction material that the embodiment of the present invention provides, comprises the raw material of following weight part: resol 10-20%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, Kafra fiber 10-20%, carbon fiber 3-5%, acicular wollastonite 8-18%, steel wool 7-15%, foam ferrous powder 3-8%, graphite 7-15%, titanium alloy titanium alloy 2-5%, molybdenumdisulphide 2-3%, Brown Alundum Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-15%, tyre talc 15-25% and aluminum oxide 1-4%.
In order to the performance of further optimizing product, present invention also offers the proportioning raw materials of a more preferred friction materials, comprise the raw material of following weight part: resol 10-15%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, Kafra fiber 10-20%, carbon fiber 3-5%, acicular wollastonite 10-15%, steel wool 8-10%, foam ferrous powder 3-5%, graphite 7-10%, titanium alloy titanium alloy 2-3%, molybdenumdisulphide 2-3%, Brown Alundum Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-10%, tyre talc 15-20% and aluminum oxide 1-2%.
In the present embodiment, resol is cashew nut oil modified alkyd resin.
Visible, in the raw material composition of the disc brake pad friction material that the embodiment of the present invention provides, metal content is lower, and not containing asbestos and any copper, with the friction materials of this kind of proportioning raw materials manufacture, meet the standard of Environment protection type friction material, and the legislation restriction of trade that more American-European countries carry out with regard to the content of noxious heavy metal components and copper in limiting friction material can be broken through, therefore, the disc brake pad friction material that the visible embodiment of the present invention provides has breakthrough creation meaning.Meanwhile, the present invention, by adding cashew nut oil modified alkyd resin, significantly improves the heat decomposition temperature of resol.Experiment proves, comprises the disc brake pad of cashew nut oil modified alkyd resin, and snub braking quality is stablized at high speeds, and heat fading is little.
In order to further optimizing product performance, in the raw material of the disc brake pad friction material that the embodiment of the present invention provides, the processing parameter of cashew nut oil modified alkyd resin is, 150-200 order, 1.2%≤free phenol content≤2%, 150 DEG C time curing speed 40-60S, 125 DEG C time flow distance 50-60mm; The processing parameter of paracril is, 40-60 order, volatile content≤1%, gel content>=70%, bound acrylonitrile content 40 ± 1%; The processing parameter of hydrogenated nitrile-butadiene rubber is, 40-60 order, volatile content≤0.8%, gel content>=75%; The processing parameter of Kafra fiber is, loss on ignition at 800 DEG C and the time be 1h in be not more than 10%, aerated density 0.13-1.20g/cm
3, moisture content≤3%, Fibre diameter 0-20um; The processing parameter of carbon fiber is, staple length 0.5-0.8mm, water content≤5%, proportion 1.3-1.5g/ml; The processing parameter of acicular wollastonite is sieve 18 orders, length-to-diameter ratio > 15, density 2.6-2.9g/cm
3, aerated density 160-200ml/100g; The processing parameter of steel wool is, equivalent diameter 40-75um, sieves 14 order 0-1%, 20 order 0-5%, 40 order 5-15%, 70 order 15-30%, 100 order 5-25%, sieve end 45-65%, aerated density 0.8-1.1g/cm
3; The processing parameter of graphite is, carbon content>=99%, crystal particle diameter 0.05-1.5mm.
But, it is easily understood that, the processing parameter of above-mentioned each composition is only the preferred version provided in the embodiment of the present invention, those skilled in the art are not when paying creative work, can expect completely and the processing parameter adopting other feasible, therefore, the present invention does not limit this.
The embodiment of the present invention additionally provides a kind of disc brake pad, and this disc brake pad comprises brake facing backboard and is compressed on the friction materials on brake facing backboard, and friction materials is above described disc brake pad friction material.
Wherein, the manufacturing process of above-mentioned disc brake pad comprises the following steps:
Steps A: raw material mixture, preparing the raw material of following weight part: resol 10-20%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, Kafra fiber 10-20%, carbon fiber 3-5%, acicular wollastonite 8-18%, steel wool 7-15%, foam ferrous powder 3-8%, graphite 7-15%, titanium alloy 2-5%, molybdenumdisulphide 2-3%, Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-15%, tyre talc 15-25%, aluminum oxide 1-4%, putting into getting out raw material the compound that mixer mixture evenly becomes friction materials;
Step B: hot-forming, the friction materials good by mixture and be painted with glue brake facing backboard send into mold pressing procedure, process the work in-process of disc brake pad;
Step C: solidification treatment, heat-treats baking to disc brake pad in baking box.
In order to optimize technique scheme further, in manufacturing process, steps A specifically comprises the following steps:
Steps A 1: by the raw material of following weight part, resol 10-20%, paracril 3-5%, acicular wollastonite 8-18%, steel wool 7-15%, foam ferrous powder 3-8%, titanium alloy 2-5%, molybdenumdisulphide 2-3%, Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-15%, tyre talc 15-25%, aluminum oxide 1-4%, disposablely put into stirrer, stir 4 to 7 minutes (being preferably 5 minutes);
Steps A 2: the graphite then adding 7-15% weight part, and stir 1.5 to 3 minutes (being preferably 2 minutes):
Steps A 3: finally add the Kafra fiber of 10-20% weight part and the carbon fiber of 3-5% weight part, then stir 2 to 4 minutes (being preferably 3 minutes), make friction materials.
In order to optimize technique scheme further, the processing parameter in the step B of manufacturing process when hot-forming is: hot pressing temperature 140-160 degree Celsius, and the time is 250-300 second (being preferably 280 seconds), and hot pressing pressure is 15-18MPa.
In order to optimize technique scheme further, in manufacturing process in step C to the processing parameter that disc brake pad heat-treats baking be: sintering work in-process are baking 1.6 to 2.5 hours (being preferably 2 hours) at the temperature of 150 to 300 DEG C (being preferably 180 DEG C), then 160-240 DEG C of (being preferably 200 DEG C) baking 2 to 3 hours (being preferably 2.5 hours).
In order to further illustrate technique scheme, in actual production, following operation is mainly passed through in the production of brake facing disclosed in the embodiment of the present invention:
(1) shear
Roll bending uncoiling is smoothed, is cut into the volume bar of sheet material or one fixed width.Foundation " shear size particular sheet " slat dimension (long × wide × thick) of product of upper regulation, select the sheet material of suitable thickness, use sheet shears to be cut into the steel plate of one fixed width;
(2) punching press
Foundation " steel backing punching process card " the upper processing flow sequence specified, select the pressing equipment progressively operation of corresponding mould and suitable tonnage, go out the basic profile of disc brake pad steel plate, and make it to reach certain entrucking size and planarity requirements;
(3) oil removing
Water base degreaser and water are by certain proportions, reach certain pH value (as 10 ~ 13), heat in oil removal machine degreasing tank, after reaching certain temperature (as 45 ~ 55 DEG C), carry out removal operation, the greasy dirt removing caused in the upper sequence course of processing by steel backing;
(4) ball blast (polishing)
Use Caterpillar type shot blasting machine, by ball blast, by jettisonings such as the rust staining of above steel backing and side, rust spot, burrs, and make the roughness requirements that steel backing reaches certain, to be satisfied with the needs of postorder processing;
(5) gluing
Import steel backing bonded adhesives and solvent, after being coordinated, use glue-spraying machine the uniform liquid prepared to be sprayed on steel backing reverse side, air-dry rear use by certain ratio, makes steel backing and friction materials reach certain shearing resistance requirement after postorder compacting;
(6) batch mixing
By automatic batching system or manual operations by each composition proportioning by a certain percentage in the raw material needed for formula, then pour stirrer fragmentation into, and stir.The friction materials be stirred and the steel backing being painted with glue, send mold pressing procedure together, process semi finished brake disc;
(7) hot pressing
Mold pressing divides weighing and compacting two steps to carry out, first be weighing, the formula number needed according to compacted products and weight, electronic platform scale weighs friction materials, the friction materials weighed is put into check weighing on checking weight weigh, ensures that the friction materials used is in the weight range of " standard value ± 1g "; Compacting afterwards, namely install after fixing mould, according to pressing process (as parameter values such as time, pressure, temperature) the set device parameter of regulation, Deng mould be warmed up to specialized range after start produce, in operating process, operator notes friction materials all to pour into die cavity, and notes the requirement of shakeouing of friction materials, operate the compacting of rear matched moulds, arrive process stipulation time after, press automatic die sinking, operator by transferred product in Revolving disc;
(8) toast
Foundation " common prescription processing requirement ", in baking box, baking is heat-treated to processed braking automobile product product, improves the frictional behaviour of friction materials further;
(9) grinding
Use modular grinding machine processing friction material surface, make thickness, parallelism and planarity requirements that friction material surface reaches certain, use fluting, grind oblique machine, processed the surface of friction materials by slotted wheel saw blade or cup emery wheel, process groove or inclined-plane;
(10) removing surface
Point polishing and sandblasting two step are carried out, first on polishing machine, by the burr of wire wheel cleaning brake block steel back periphery, flash and overlap etc., again on sandblast machine, by brown corundum abrasive, dirt, corrosion etc. above cleaning brake block steel back, in order to ensure the specification of quality that postorder is processed;
(11) spray
The product that removing surface is complete, according to the different requirements of different client, cover above brake block steel back, side and friction materials side by the powder of different colours, different brightness, product passes through stoving oven, through states such as melting, smooth and level, solidifications, reach certain sticking power requirement;
(12) stamp
Use code jetting device and ink special, on steel backing surface, vibration damping sheet is surperficial, or friction materials side, the different information of the different client of spray printing, and the processing lot number of product so that product sell after review;
(13) installation accessories
Brake block steel back is installed, fixes some noise reductions, warning device;
(14) pack
According to customer requirement, use sealing machine, thermal contraction machine by disc brake pad finished product by mounted box after plastic uptake film vacuum constriction, or use skin packaging machine, by fit film, product and cardboard vacuum are pasted jail.
Adopt as above technical scheme, present invention also offers following specific embodiment.
First embodiment:
In table 1 first embodiment without copper disk type brake slice prescription
First by resol, paracril, acicular wollastonite, steel wool, iron powder, titanium alloy, molybdenumdisulphide, Brown Alundum, vermiculite,
Frication powder, tyre talc, aluminum oxide are disposable puts into stirrer, stirs 5 minutes; Then add graphite and stir 2 minutes, finally add Kafra fiber, carbon fiber, then stir 3 minutes, make compound.Pressing process is 140-160 DEG C, utilizes holotype to make brake facing.
Originally the test performance being the disc brake pad that embodiment provides is as follows:
The test result of the disc brake pad that table 2 first embodiment provides
Noise test result: be greater than 70 decibels, 5%, is greater than 80 decibel 2%.
Second embodiment:
In table 3 second embodiment without copper disk type brake slice prescription
First by resol, paracril, acicular wollastonite, steel wool, iron powder, titanium alloy, molybdenumdisulphide, Brown Alundum, vermiculite,
Frication powder, tyre talc, aluminum oxide are disposable puts into stirrer, stirs 5 minutes; Then add graphite and stir 2 minutes, finally add Kafra fiber, carbon fiber, then stir 3 minutes, make compound.Pressing process is 140-160 DEG C, utilizes holotype to make brake facing.
This brake facing test performance is as follows:
The test result of the disc brake pad that table 4 second embodiment provides
Noise test result: be greater than 70 decibels, 4.5%, is greater than 80 decibel 2.5%.
3rd embodiment:
In table 5 the 3rd embodiment without copper disk type brake slice prescription
First by resol, paracril, acicular wollastonite, steel wool, iron powder, titanium alloy, molybdenumdisulphide, Brown Alundum, vermiculite, Frication powder, tyre talc, aluminum oxide is disposable puts into stirrer, stir 5 minutes; Then add graphite and stir 2 minutes, finally add Kafra fiber, carbon fiber, then stir 2 minutes, make compound.Pressing process is 140-160 DEG C, utilizes holotype to make brake facing.
This brake facing test performance is as follows:
The test result of the disc brake pad that table 6 the 3rd embodiment provides
Noise test result: be greater than 70 decibels, 3%, is greater than 80 decibel 0.8%.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a disc brake pad friction material, it is characterized in that, comprise the raw material of following weight part: cashew nut oil modified alkyd resin 10-15%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, Kafra fiber 10-20%, carbon fiber 3-5%, acicular wollastonite 10-15%, steel wool 8-10%, foam ferrous powder 3-5%, graphite 7-10%, titanium alloy 2-3%, molybdenumdisulphide 2-3%, Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-10%, tyre talc 15-20% and aluminum oxide 1-2%.
2. disc brake pad friction material according to claim 1, it is characterized in that, the processing parameter of described cashew nut oil modified alkyd resin, 150-200 order, 1.2%≤free phenol content≤2%, 150 DEG C time curing speed 40-60S, 125 DEG C time flow distance 50-60mm;
The processing parameter of described paracril is, 40-60 order, volatile content≤1%, gel content >=70%, bound acrylonitrile content 40 ± 1%;
The processing parameter of described hydrogenated nitrile-butadiene rubber is, 40-60 order, volatile content≤0.8%, gel content >=75%;
The processing parameter of described Kafra fiber is, loss on ignition at 800 DEG C and the time be 1h in be not more than 10%, aerated density 0.13-1.20g/cm3, moisture content≤3%, Fibre diameter 0-20 μm;
The processing parameter of described carbon fiber is, staple length 0.5-0.8mm, water content≤5%, proportion 1.3-1.5; The processing parameter of described acicular wollastonite is sieve 18 orders, length-to-diameter ratio > 15, density 2.6-2.9g/cm3, aerated density 160-200ml/100g;
The processing parameter of described steel wool is, equivalent diameter 40-75 μm, sieve 14 order 0-1%, 20 order 0-5%, 40 order 5-15%, 70 order 15-30%, 100 order 5-25%, sieve end 45-65%, aerated density 0.8-1.1g/cm3; The processing parameter of described graphite is, carbon content >=99%, crystal particle diameter 0.05-1.5mm.
3. a disc brake pad, comprise brake facing backboard and be compressed on the friction materials on described brake facing backboard, it is characterized in that, described friction materials is the disc brake pad friction material as described in any one of claim 1-2.
4. a manufacturing process for disc brake pad, is characterized in that, comprises the following steps:
Steps A: raw material mixture, preparing the raw material of following weight part: cashew nut oil modified alkyd resin 10-15%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, Kafra fiber 10-20%, carbon fiber 3-5%, acicular wollastonite 10-15%, steel wool 8-10%, foam ferrous powder 3-5%, graphite 7-10%, titanium alloy 2-3%, molybdenumdisulphide 2-3%, Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-10%, tyre talc 15-20% and aluminum oxide 1-2%, putting into getting out raw material the compound that mixer mixture evenly becomes friction materials;
Step B: hot-forming, by described friction materials good for mixture and the brake facing backboard feeding mold pressing procedure being painted with glue, processes the work in-process of disc brake pad;
Step C: solidification treatment, heat-treats baking to described disc brake pad in baking box.
5. the manufacturing process of disc brake pad according to claim 4, is characterized in that, described steps A specifically comprises the following steps:
Steps A 1: by the raw material of following weight part, cashew nut oil modified alkyd resin 10-15%, paracril 1-2%, hydrogenated nitrile-butadiene rubber 1-2%, acicular wollastonite 10-15%, steel wool 8-10%, foam ferrous powder 3-5%, titanium alloy 2-3%, molybdenumdisulphide 2-3%, Brown Alundum 0-1.5%, vermiculite 3-5%, cashew nut shell oil Frication powder 5-10%, tyre talc 15-20% and aluminum oxide 1-2%, disposablely put into stirrer, stir 4 to 7 minutes;
Steps A 2: the graphite then adding 7-10% weight part, and stir 1.5 to 3 minutes;
Steps A 3: finally add the Kafra fiber of 10-20% weight part and the carbon fiber of 3-5% weight part, then stir 2 to 4 minutes, make the compound of friction materials.
6. the manufacturing process of disc brake pad according to claim 4, is characterized in that, the processing parameter in described step B when hot-forming is:
Hot pressing temperature 140-160 degree Celsius, the time is 250-300 second, and hot pressing pressure is 15-18MPa.
7. the manufacturing process of disc brake pad according to claim 4, is characterized in that, in described step C to the processing parameter that described disc brake pad heat-treats baking is:
Sintering work in-process toast 1.6 to 2.5 hours at the temperature of 150 to 300 DEG C, then 160-240 DEG C of baking 2 to 3 hours.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778402A (en) * | 2016-03-17 | 2016-07-20 | 合肥晨煦信息科技有限公司 | Resin-based wear-resistant metal |
| CN106350009A (en) * | 2016-08-25 | 2017-01-25 | 江苏新宏泰摩擦材料有限公司 | Graphene friction granules and preparation method thereof |
| CN109128188A (en) * | 2018-09-15 | 2019-01-04 | 无锡市金珀车业有限公司 | A kind of disc brake piston powder metallurgical processing moulding process |
| CN111120550A (en) * | 2020-01-12 | 2020-05-08 | 宁国飞鹰汽车零部件股份有限公司 | Dedicated strong wear-resisting brake block of heavy-duty truck |
| CN112228483A (en) * | 2019-11-06 | 2021-01-15 | 晋江凯燕新材料科技有限公司 | Modified organic filling material for friction material and preparation process thereof |
| CN112963476A (en) * | 2021-02-24 | 2021-06-15 | 枣阳华奥汽车配件有限公司 | Processing technology of environment-friendly high-performance copper-free brake pad |
| CN114776744A (en) * | 2022-03-30 | 2022-07-22 | 枣阳风神摩擦材料有限公司 | Friction plate composite material and preparation method thereof |
| CN115353711A (en) * | 2022-08-26 | 2022-11-18 | 上海壬丰新材料科技有限公司 | Friction material, environment-friendly brake shoe containing friction material and preparation method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778402A (en) * | 2016-03-17 | 2016-07-20 | 合肥晨煦信息科技有限公司 | Resin-based wear-resistant metal |
| CN106350009A (en) * | 2016-08-25 | 2017-01-25 | 江苏新宏泰摩擦材料有限公司 | Graphene friction granules and preparation method thereof |
| CN109128188A (en) * | 2018-09-15 | 2019-01-04 | 无锡市金珀车业有限公司 | A kind of disc brake piston powder metallurgical processing moulding process |
| CN112228483A (en) * | 2019-11-06 | 2021-01-15 | 晋江凯燕新材料科技有限公司 | Modified organic filling material for friction material and preparation process thereof |
| CN111120550A (en) * | 2020-01-12 | 2020-05-08 | 宁国飞鹰汽车零部件股份有限公司 | Dedicated strong wear-resisting brake block of heavy-duty truck |
| CN111120550B (en) * | 2020-01-12 | 2021-10-19 | 安徽飞鹰汽车零部件股份有限公司 | Dedicated strong wear-resisting brake block of heavy-duty truck |
| CN112963476A (en) * | 2021-02-24 | 2021-06-15 | 枣阳华奥汽车配件有限公司 | Processing technology of environment-friendly high-performance copper-free brake pad |
| CN114776744A (en) * | 2022-03-30 | 2022-07-22 | 枣阳风神摩擦材料有限公司 | Friction plate composite material and preparation method thereof |
| CN115353711A (en) * | 2022-08-26 | 2022-11-18 | 上海壬丰新材料科技有限公司 | Friction material, environment-friendly brake shoe containing friction material and preparation method |
| CN115353711B (en) * | 2022-08-26 | 2023-09-15 | 上海壬丰新材料科技有限公司 | Friction material, environment-friendly brake shoe containing friction material and preparation method |
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