CN105295838A - Drum type brake lining friction material and drum type brake lining preparation method - Google Patents
Drum type brake lining friction material and drum type brake lining preparation method Download PDFInfo
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- CN105295838A CN105295838A CN201510794000.8A CN201510794000A CN105295838A CN 105295838 A CN105295838 A CN 105295838A CN 201510794000 A CN201510794000 A CN 201510794000A CN 105295838 A CN105295838 A CN 105295838A
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Abstract
The invention relates to a drum type brake lining friction material and a drum type brake lining preparation method, and belongs to the technical field of vehicles, wherein the drum type brake lining friction material comprises, by weight, 10-15% of a phenolic resin, 6-12% of glass fibers, 10-15% of petroleum coke, 10-20% of mineral fibers, 10-50% of barium sulfate, 3-8% of alumina, 5-10% of artificial graphite, 5-10% of friction powder, and 3-5% of nitrile butadiene rubber powder, and raw material mixing matching according to the ratio, hot pressing molding, heat treatment, grinding drilling and printing packaging are performed to prepare the drum type brake lining finished product. According to the present invention, based on the disadvantages in the prior art, the components in the brake lining friction material are improved, such that the hardness can be correspondingly reduced while the porosity of the brake lining is increased, and the service life of the brake lining is prolonged.
Description
Technical field
The invention belongs to automobile technical field, particularly relate to a kind of drum-type brake pad friction materials and apply the method that this friction materials makes drum-type brake pad.
Background technology
Along with to commercial car damping force, braking comfortableness and the concern of brake life, particularly to the concern in the work-ing life of brake drum and brake facing, also more and more stricter to the requirement of brake facing.
The mode of braking that current commercial car adopts is mostly gas braking, officer is by applying pedal force to foot board, by mechanism, pedal force is reached air pressure master cylinder, master cylinder distributes the air pressure of corresponding brake-treading force to each wheel cylinder of taking turns, wheel cylinder drives S cam axle, two shoes are opened, and extruding brake drum produces damping force.In this course, distribute and the atmospheric pressure value that comes no doubt can affect the size of damping force, the friction plate size that can affect damping force same with the fitting area of brake drum.And fitting area is bad, for reaching identical damping force, just can produce the larger damping force to drum in joint place, to being also a kind of infringement the work-ing life of drum.Equally, to being also a kind of infringement the work-ing life of friction plate and very easily producing noise.The hardness number of brake facing affects the deformation of brake facing and then affects the key index of damping force size, brake drum and friction plate work-ing life and noise.Drum-type brake pad hardness common in the market, mainly between 80 ~ 110HRS, belongs to hardness higher, not easily produces deformation.
Brake block friction material is primarily of part compositions such as binding agent, frictional property regulator, filler, fibers.
The caking agent that friction materials generally uses is resol, according to the characteristic of resol, under certain temperature, pressure, be bonded together by other materials, caking agent can affect the heat fading performance of material, restorability, frictional coefficient, wearing and tearing and mechanical property.Resol has various modification model, and as cashew nut oil modified alkyd resin, nitrile rubber modified phenolic resin etc., different modified phenolic resinss is a certain item performance in order to strengthen resin.
Frictional property regulator is mainly the low antifriction material of Mohs' hardness as graphite, molybdenumdisulphide etc., adds and reduces wearing and tearing to reduce frictional coefficient.And Mohs' hardness high increasing mill material as aluminum oxide etc., add mainly for improve frictional coefficient.
Filler is mainly the powder material of various stable performance, as barium sulfate and calcium carbonate etc.
And fiber plays the effect of skeleton in whole friction plate, be the framework supporting friction plate, the size of fibre strength directly affects the size of the shock strength of whole friction plate.And used fiber mainly contains steel fiber, mineral fibre, glass fibre, organic fibre etc.
Common material mixture ratio is difficult to improve friction plate hardness this problem higher, therefore needs badly in the middle of prior art and wants a kind of novel technical scheme to solve this problem.
Summary of the invention
Technical problem to be solved by this invention is: the preparation method providing a kind of drum-type brake pad friction materials and drum-type brake pad, for the shortcoming existed in prior art, component in brake block friction material is improved, while the porosity increasing brake facing, also can reduce hardness accordingly, increase the work-ing life of brake facing.
A kind of drum-type brake pad friction materials, is characterized in that: comprise the resol of weight ratio 10% ~ 15%, 6% ~ 12% glass fibre, 10% ~ 15% petroleum coke, 10% ~ 20% mineral fibre, 10% ~ 50% barium sulfate, 3% ~ 8% aluminum oxide, the synthetic graphite of 5% ~ 10%, the Frication powder of 5% ~ 10% and 3 ~ 5% nitrile rubber powder.
A preparation method for drum-type brake pad, is characterized in that: application rights requires the friction materials described in 1, comprises the following steps,
Step one, raw material mixture
Choose batching according to weight ratio according to claim 1, put into mixer mixing 10 minutes, obtain friction materials;
Step 2, hot-forming
The friction materials obtain described step one and brake facing backboard are sent in pressing machine and are suppressed, and pressing machine temperature value is set to 145 DEG C ~ 155 DEG C, and force value is set to 20Mpa ~ 25Mpa, suppress and obtain semi finished brake disc in 5 minutes ~ 10 minutes;
Step 3, thermal treatment
The semi finished brake disc that described step 2 obtains is put into heat treatment box, at the temperature of 150 DEG C ~ 160 DEG C, thermal treatment 5 hours ~ 8 hours, work in-process after acquisition thermal treatment;
Step 4, grinding boring
Work in-process after the process obtain described step 3, carry out sharp processing according to drum brakes chip size, obtain drum-type brake pad finished product;
Step 5, printing packaging
The drum-type brake pad finished product described step 4 obtained carries out identifying and printing, and packs stored in storehouse.
Described resol is nitrile rubber modified phenolic resin.
The granularity of described synthetic graphite and petroleum coke is 20 order ~ 40 orders, and carbon content is greater than 98%, and the granularity of described Frication powder is 40 order ~ 60 orders, and the granularity of described aluminum oxide is 200 order ~ 325 orders.
The Fibre diameter of described glass fibre is 15 μm ~ 17 μm, and staple length is 14.5 μm ~ 17.5 μm, and the variation coefficient of Fibre diameter is less than or equal to 13%; The staple length of described mineral fibre is 100 μm ~ 150 μm, and the content of slag ball is less than or equal to 1%.
Described nitrile rubber powder granularity 40 order ~ 60 order, 100 DEG C of Mooney viscosity are 90 ~ 140, bound acrylonitrile content 37% ~ 40%, gel content 70% ~ 90%, fugitive constituent≤1.0%.
The granularity of described barium sulfate and aluminum oxide is 200 order ~ 325 orders.
By above-mentioned design, the present invention can bring following beneficial effect: the preparation method of a kind of drum-type brake pad friction materials and drum-type brake pad, for the shortcoming existed in prior art, component in brake facing abrasives is improved, while the porosity increasing brake facing, also can reduce hardness accordingly, increase the work-ing life of brake facing; Order number is selected to be 20 order ~ 40 object synthetic graphite and petroleum cokes, order number is selected to be 40 object Frication powder, add part acrylonitrile-butadiene rubber powder, by adding the less material of hardness as Frication powder, acrylonitrile-butadiene rubber powder etc. and the proportioning improving different-grain diameter material, to reach the object of hardness at 60HRS ~ 80HRS.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated:
Fig. 1 is the preparation flow schematic diagram of the preparation method of a kind of drum-type brake pad friction materials of the present invention and drum-type brake pad.
Embodiment
The preparation method of a kind of drum-type brake pad friction materials and drum-type brake pad, a kind of drum-type brake pad friction materials, is characterized in that: comprise the resol of weight ratio 10% ~ 15%, 6% ~ 12% glass fibre, 10% ~ 15% petroleum coke, 10% ~ 20% mineral fibre, 10% ~ 50% barium sulfate, 3% ~ 8% aluminum oxide, the synthetic graphite of 5% ~ 10%, the Frication powder of 5% ~ 10% and 3% ~ 5% nitrile rubber powder.
A preparation method for drum-type brake pad, as shown in Figure 1, comprises the following steps,
Step one, raw material mixture
Choose batching according to weight ratio according to claim 1, put into mixer mixing 10 minutes, obtain friction materials;
Step 2, hot-forming
The friction materials obtain described step one and brake facing backboard are sent in pressing machine and are suppressed, and pressing machine temperature value is set to 145 DEG C ~ 155 DEG C, and force value is set to 20Mpa ~ 25Mpa, suppress and obtain semi finished brake disc in 5 minutes ~ 10 minutes;
Step 3, thermal treatment
The semi finished brake disc that described step 2 obtains is put into heat treatment box, at the temperature of 150 DEG C ~ 160 DEG C, thermal treatment 5 hours ~ 8 hours, work in-process after acquisition thermal treatment;
Step 4, grinding boring
Work in-process after the process obtain described step 3, carry out sharp processing according to drum brakes chip size, obtain drum-type brake pad finished product;
Step 5, printing packaging
The drum-type brake pad finished product described step 4 obtained carries out identifying and printing, and packs stored in storehouse.
In following embodiment, resol is nitrile rubber modified phenolic resin, purchased from its technical parameter of Jiangsu is: granularity 200 order ~ 250 order, free phenol content≤2.5%, and curing speed when 150 DEG C is 50 seconds ~ 90 seconds, flow distance 20mm ~ 50mm when 125 DEG C;
Glass fibre is purchased from Danyang, and its technical parameter is: Fibre diameter 16 ± 1um, staple length 6 ± 1.5mm, the Fibre diameter variation coefficient≤13%;
Petroleum coke is purchased from Hebei, and its technical parameter is: granularity 20 order ~ 40 order, carbon content > 98%;
Mineral fibre is purchased from Hebei, and its technical parameter is: staple length 100um ~ 150um, slag ball content≤1%;
Barium sulfate is purchased from Shandong, and its technical parameter is: granularity 200 order ~ 325 order, moisture≤2%;
Aluminum oxide is purchased from Shandong, and its technical parameter is: granularity 200 order ~ 325 order;
Synthetic graphite is purchased from Shandong, and its technical parameter is: granularity 20 order ~ 40 order, carbon content > 99%;
Frication powder is purchased from Guangzhou, and its technical parameter is: granularity 40 order ~ 60 order, and at 370 DEG C, volatile matter is 21% ~ 25%;
Nitrile rubber powder is purchased from Anhui, and its technical parameter is: granularity 40 order ~ 60 order, and 100 DEG C of Mooney viscosity are 90 ~ 140, bound acrylonitrile content 37% ~ 40%, gel content 70% ~ 90%, fugitive constituent≤1.0%.
Embodiment 1:
Resol, glass fibre, petroleum coke, mineral fibre, barium sulfate, aluminum oxide, synthetic graphite, Frication powder, the disposable stirrer of putting into of nitrile rubber powder are stirred 10 minutes one-tenth compounds, by pressing machine under the pressure of (150 ± 5) DEG C, 20MPa ~ 25MPa 5 minutes ~ within 10 minutes, be hot pressed into the work in-process of brake facing, 150 DEG C ~ 160 DEG C are carried out, the thermal treatment of 5h ~ 8h through heat treatment box.
Test result is as follows:
Physicals:
Density: 2.11g/cm
3
Rockwell hardness: 73HRS
Shock strength: 3.76KJ/m
2
Friction and wear behavior: undertaken by GB5763-2008 on XD-MSM constant speed trier.
Embodiment 2:
Resol, glass fibre, petroleum coke, mineral fibre, barium sulfate, aluminum oxide, synthetic graphite, Frication powder, the disposable stirrer of putting into of nitrile rubber powder are stirred 10 minutes one-tenth compounds, by pressing machine under the pressure of (150 ± 5) DEG C, 20MPa ~ 25MPa 5 minutes ~ within 10 minutes, be hot pressed into the work in-process of brake facing, 150 DEG C ~ 160 DEG C are carried out, the thermal treatment of 5 ~ 8h through heat treatment box.
Test result is as follows:
Physicals:
Density: 2.01g/cm
3
Rockwell hardness: 66HRS
Shock strength: 4.17KJ/m
2
Friction and wear behavior: undertaken by GB5763-2008 on XD-MSM constant speed trier.
Embodiment 3:
Resol, glass fibre, petroleum coke, mineral fibre, barium sulfate, aluminum oxide, synthetic graphite, Frication powder, the disposable stirrer of putting into of nitrile rubber powder are stirred 10 minutes one-tenth compounds, by pressing machine under the pressure of (150 ± 5) DEG C, 20MPa ~ 25MPa 5 minutes ~ within 10 minutes, be hot pressed into the work in-process of brake facing, 150 DEG C ~ 160 DEG C are carried out, the thermal treatment of 5h ~ 8h through heat treatment box.
Test result is as follows:
Physicals:
Density: 2.05g/cm
3
Rockwell hardness: 70HRS
Shock strength: 3.91KJ/m
2
Friction and wear behavior: undertaken by GB5763-2008 on XD-MSM constant speed trier.
Comparative example 1:
In this comparative example drum-type brake pad friction materials remove acrylonitrile-butadiene rubber powder, replaced by barium sulfate, all the other components and proportioning content in the same manner as in Example 1.Its preparation process is with embodiment 1.
Test result is as follows:
Physicals:
Density: 2.15g/cm
3
Rockwell hardness: 91HRS
Shock strength: 4.18KJ/m
2
Friction and wear behavior: undertaken by GB5763-2008 on XD-MSM constant speed trier.
Comparative example 2:
In this comparative example drum-type brake pad friction materials remove Frication powder, replaced by barium sulfate, all the other components and proportioning content in the same manner as in Example 1.Its preparation process is with embodiment 1.
Test result is as follows:
Physicals:
Density: 2.13g/cm
3
Rockwell hardness: 88HRS
Shock strength: 3.98KJ/m
2
Friction and wear behavior: undertaken by GB5763-2008 on XD-MSM constant speed trier.
Comparative example 3:
In this comparative example drum-type brake pad friction materials remove petroleum coke, replaced by barium sulfate, all the other components and proportioning content in the same manner as in Example 1.Its preparation process is with embodiment 1.
Test result is as follows:
Physicals:
Density: 2.14g/cm
3
Rockwell hardness: 85HRS
Shock strength: 3.68KJ/m
2
Friction and wear behavior: undertaken by GB5763-2008 on XD-MSM constant speed trier.
Comparative example 4:
In this comparative example drum-type brake pad friction materials remove synthetic graphite, replaced by barium sulfate, all the other components and proportioning content in the same manner as in Example 1.Its preparation process is with embodiment 1.
Test result is as follows:
Physicals:
Density: 2.14g/cm
3
Rockwell hardness: 92HRS
Shock strength: 3.86KJ/m
2
Friction and wear behavior: undertaken by GB5763-2008 on XD-MSM constant speed trier.
By the drum-type brake pad that the friction materials in the present invention makes, its hardness of embodiment all can reach 60HRS ~ 80HRS, and frictional coefficient is steady, and wear rate is less, and test-results meets the requirements.In comparative example 1,2,3,4, frictional coefficient fluctuation is comparatively large, and wear rate is higher, and hardness reaches requirement.
Above-mentioned embodiment is intended to illustrate that the present invention can be professional and technical personnel in the field and realizes or use; modifying to above-mentioned embodiment will be apparent for those skilled in the art; therefore the present invention includes but be not limited to above-mentioned embodiment; any these claims or specification sheets of meeting describes; meet and principle disclosed herein and novelty, the method for inventive features, technique, product, all fall within protection scope of the present invention.
Claims (7)
1. a drum-type brake pad friction materials, is characterized in that: comprise the resol of weight ratio 10% ~ 15%, 6% ~ 12% glass fibre, 10% ~ 15% petroleum coke, 10% ~ 20% mineral fibre, 10% ~ 50% barium sulfate, 3% ~ 8% aluminum oxide, the synthetic graphite of 5% ~ 10%, the Frication powder of 5% ~ 10% and 3 ~ 5% nitrile rubber powder.
2. a preparation method for drum-type brake pad, is characterized in that: application rights requires the friction materials described in 1, comprises the following steps
Step one, raw material mixture
Choose batching according to weight ratio according to claim 1, put into mixer mixing 10 minutes, obtain friction materials;
Step 2, hot-forming
The friction materials obtain described step one and brake facing backboard are sent in pressing machine and are suppressed, and pressing machine temperature value is set to 145 DEG C ~ 155 DEG C, and force value is set to 20Mpa ~ 25Mpa, suppress and obtain semi finished brake disc in 5 minutes ~ 10 minutes;
Step 3, thermal treatment
The semi finished brake disc that described step 2 obtains is put into heat treatment box, at the temperature of 150 DEG C ~ 160 DEG C, thermal treatment 5 hours ~ 8 hours, work in-process after acquisition thermal treatment;
Step 4, grinding boring
Work in-process after the process obtain described step 3, carry out sharp processing according to drum brakes chip size, obtain drum-type brake pad finished product;
Step 5, printing packaging
The drum-type brake pad finished product described step 4 obtained carries out identifying and printing, and packs stored in storehouse.
3. a kind of drum-type brake pad friction materials according to claim 1, is characterized in that: described resol is nitrile rubber modified phenolic resin.
4. a kind of drum-type brake pad friction materials according to claim 1, it is characterized in that: the granularity of described synthetic graphite and petroleum coke is 20 order ~ 40 orders, carbon content is greater than 98%, and the granularity of described Frication powder is 40 order ~ 60 orders, and the granularity of described aluminum oxide is 200 ~ 325 orders.
5. a kind of drum-type brake pad friction materials according to claim 1, is characterized in that: the Fibre diameter of described glass fibre is 15 μm ~ 17 μm, and staple length is 14.5 μm ~ 17.5 μm, and the variation coefficient of Fibre diameter is less than or equal to 13%; The staple length of described mineral fibre is 100 μm ~ 150 μm, and the content of slag ball is less than or equal to 1%.
6. a kind of drum-type brake pad friction materials according to claim 1, it is characterized in that: described nitrile rubber powder granularity 40 order ~ 60 order, 100 DEG C of Mooney viscosity are 90 ~ 140, bound acrylonitrile content 37% ~ 40%, gel content 70% ~ 90%, fugitive constituent≤1.0%.
7. a kind of drum-type brake pad friction materials according to claim 1, is characterized in that: the granularity of described barium sulfate and aluminum oxide is 200 order ~ 325 orders.
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| CN201510794000.8A CN105295838B (en) | 2015-11-18 | 2015-11-18 | A kind of preparation method of drum-type brake pad friction material and drum-type brake pad |
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Cited By (10)
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| CN108167352A (en) * | 2017-12-27 | 2018-06-15 | 重庆红宇摩擦制品有限公司 | It is used to prepare the composition of disk type brake disc bed course |
| CN108443376A (en) * | 2018-03-22 | 2018-08-24 | 捷通磨擦材料（昆山）有限公司 | A kind of explosion-proof mine mechanical brake piece and preparation method thereof |
| CN108458015A (en) * | 2018-01-30 | 2018-08-28 | 湖北飞龙摩擦密封材料股份有限公司 | A kind of drum brake lining |
| CN108468735A (en) * | 2018-03-20 | 2018-08-31 | 枣阳兴亚摩擦材料有限公司 | A kind of asbestos-free friction material and preparation method and application |
| CN110218371A (en) * | 2019-06-25 | 2019-09-10 | 衡水京运和机电设备有限公司 | A kind of automotive brake pads bloop and preparation method thereof |
| CN110497149A (en) * | 2019-07-31 | 2019-11-26 | 山东金麒麟股份有限公司 | A kind of drum brakes piece making method |
| CN112727966A (en) * | 2020-12-25 | 2021-04-30 | 湖北飞龙摩擦密封材料股份有限公司 | Preparation method of brake friction plate processed through flat plate die |
| CN112980392A (en) * | 2021-03-03 | 2021-06-18 | 张豪 | Wear-resistant low-noise soft brake pad and preparation method thereof |
| CN114962510A (en) * | 2022-06-07 | 2022-08-30 | 枣阳风神摩擦材料有限公司 | Drum type friction plate and preparation method thereof |
| CN115651287A (en) * | 2022-12-29 | 2023-01-31 | 沈阳远程摩擦密封材料有限公司 | Synthetic brake pad matched with urban rail aluminum alloy brake disc |
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| CN103436222A (en) * | 2013-08-14 | 2013-12-11 | 包头市大川机械科技有限公司 | Preparation method for lanthanide modified brake pad of mining truck |
| CN104877631A (en) * | 2015-05-12 | 2015-09-02 | 长春特必克世立汽车零部件有限公司 | Drum-type brake pad friction material with high impact strength |
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| CN103436222A (en) * | 2013-08-14 | 2013-12-11 | 包头市大川机械科技有限公司 | Preparation method for lanthanide modified brake pad of mining truck |
| CN104877631A (en) * | 2015-05-12 | 2015-09-02 | 长春特必克世立汽车零部件有限公司 | Drum-type brake pad friction material with high impact strength |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167352A (en) * | 2017-12-27 | 2018-06-15 | 重庆红宇摩擦制品有限公司 | It is used to prepare the composition of disk type brake disc bed course |
| CN108458015A (en) * | 2018-01-30 | 2018-08-28 | 湖北飞龙摩擦密封材料股份有限公司 | A kind of drum brake lining |
| CN108458015B (en) * | 2018-01-30 | 2020-01-07 | 湖北飞龙摩擦密封材料股份有限公司 | Drum type brake lining |
| CN108468735A (en) * | 2018-03-20 | 2018-08-31 | 枣阳兴亚摩擦材料有限公司 | A kind of asbestos-free friction material and preparation method and application |
| CN108443376A (en) * | 2018-03-22 | 2018-08-24 | 捷通磨擦材料（昆山）有限公司 | A kind of explosion-proof mine mechanical brake piece and preparation method thereof |
| CN110218371A (en) * | 2019-06-25 | 2019-09-10 | 衡水京运和机电设备有限公司 | A kind of automotive brake pads bloop and preparation method thereof |
| CN110497149A (en) * | 2019-07-31 | 2019-11-26 | 山东金麒麟股份有限公司 | A kind of drum brakes piece making method |
| CN112727966A (en) * | 2020-12-25 | 2021-04-30 | 湖北飞龙摩擦密封材料股份有限公司 | Preparation method of brake friction plate processed through flat plate die |
| CN112980392A (en) * | 2021-03-03 | 2021-06-18 | 张豪 | Wear-resistant low-noise soft brake pad and preparation method thereof |
| CN114962510A (en) * | 2022-06-07 | 2022-08-30 | 枣阳风神摩擦材料有限公司 | Drum type friction plate and preparation method thereof |
| CN115651287A (en) * | 2022-12-29 | 2023-01-31 | 沈阳远程摩擦密封材料有限公司 | Synthetic brake pad matched with urban rail aluminum alloy brake disc |
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