CN109372911A - A kind of low abrasion disk brake pad and preparation method thereof - Google Patents
A kind of low abrasion disk brake pad and preparation method thereof Download PDFInfo
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- CN109372911A CN109372911A CN201811560978.8A CN201811560978A CN109372911A CN 109372911 A CN109372911 A CN 109372911A CN 201811560978 A CN201811560978 A CN 201811560978A CN 109372911 A CN109372911 A CN 109372911A
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- China
- Prior art keywords
- parts
- buffer layer
- ceramic layer
- disk brake
- brake pad
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/0006—Noise or vibration control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/0006—Noise or vibration control
- F16D65/0018—Dynamic vibration dampers, e.g. mass-spring systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Compositions of linings; Methods of manufacturing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Compositions of linings; Methods of manufacturing
- F16D69/023—Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
- F16D2069/007—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure comprising a resilient layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
- F16D2069/008—Layers of fibrous materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0034—Materials; Production methods therefor non-metallic
- F16D2200/0039—Ceramics
- F16D2200/0047—Ceramic composite, e.g. C/C composite infiltrated with Si or B, or ceramic matrix infiltrated with metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0023—Shaping by pressure
Abstract
The present invention provides a kind of low abrasion disk brake pads, by between steel back and ceramic layer be added the buffer layer containing magnetic material, the cementability between buffer layer and steel back faying face can be improved, friction material buffer layer is fallen from steel back emaciated face when effectivelying prevent because of braking high temperature (400~500 DEG C), leads to the accident of brake failure.And increase the adhesive strength between friction plate and steel back.And rubbing surface is avoided irony hard spot occur, it eliminates the treble generated in braking process and braking is trembled, and brake disc scratch and groove because of the generation of irony hard spot, improve the service life of brake disc.
Description
Technical field
The present invention relates to friction catch technical fields, and in particular to a kind of low abrasion disk brake pad and the disc type are rubbed
The preparation method of pad.
Background technique
Disk brake pad refers to the component being made of steel back and friction material layer, is widely used in mechanical engineering and automobile system
Make field.Its superiority and inferiority not only influences the driving performance of vehicle, but also is related to the life security and driving comfort of driver and passenger
Property.
With flourishing for new-energy automobile industry, passenger car market requires to get over to braking comfort, environment friendly
Come higher.Phenomena such as eliminating brake noise, the trembling concern more more and more intense by client and market, disk brake pad is by tradition
Metal semimetal base type is to ceramic base transition.
Although without adding any metal group material (such as steel fibre) at the beginning of ceramic based friction plate design, in practical life
In production, a small amount of metal particle can be mixed into the mineral fibres and filler in ceramic based friction plate, this is unavoidable.Therefore exist
In braking process, metal particle, such as iron tramp can be distributed in friction plate working face and and brake disc, sharp thorn can be generated
Ear is screamed, and generate and scratch brake disc, braking such as is trembled at the failures.The intervention of irony particle will lead to local friction's face braking system
Number is unstable, generates brake side-slipping, or even the accidents generation such as turn on one's side, knock into the back.Therefore it needs to avoid ceramic based friction plate and steel back
Direct contact.
In consideration of it, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of low abrasion disk brake pad.
The second object of the present invention is to provide the preparation method of the disk brake pad.
To achieve the above object, technical scheme is as follows:
The present invention relates to a kind of low abrasion disk brake pad, the disk brake pad includes the steel back being successively bonded, buffering
Layer and ceramic layer, wherein
The buffer layer is by including that the raw material of following parts by weight is prepared: 10~20 parts of glass fibre, vermiculite 1~10
Part, 7~15 parts of phenolic resin, 15~25 parts of precipitated calcium carbonate, 2~8 parts of flaxen fiber, 1~10 part of calcium hydroxide, neodymium iron boron powdery
1~10 part of alloy, 1~10 part of petroleum coke powdered carbon, 7~15 parts of mineral fibres, 6~13 parts of EPDM rubber powder, barium sulfate 1~10
Part；
The ceramic layer is by including that the raw material of following parts by weight is prepared: 7~15 parts of carbon fiber, ceramic fibre 6~
13 parts, 10~20 parts of precipitated calcium carbonate, 10~20 parts of phenolic resin, 1~7 part of calcium hydroxide, 7~15 parts of diatomite, barium sulfate
10~20 parts, 4~10 parts of graphite, 1~10 part of petroleum coke powdered carbon, 1~7 part of mica, 1~7 part of aluminium oxide, aramid fiber 1~7
Part.
Preferably, the buffer layer is by including that the raw material of following parts by weight is prepared: 15 parts of glass fibre, vermiculite 5
Part, 13 parts of phenolic resin, 20 parts of precipitated calcium carbonate, 5 parts of flaxen fiber, 5 parts of calcium hydroxide, 6 parts of neodymium iron boron powdery alloy, petroleum coke
5 parts of powdered carbon, 10 parts of mineral fibres, 8 parts of EPDM rubber powder, 6 parts of barium sulfate.
Preferably, the ceramic layer is by including that the raw material of following parts by weight is prepared: 10 parts of carbon fiber, ceramic fibre
101 8 parts, 14 parts of precipitated calcium carbonate, 16 parts of phenolic resin, 4 parts of calcium hydroxide, 10 parts of diatomite, 15 parts of barium sulfate, graphite 6
Part, 6 parts of petroleum coke powdered carbon, 4 parts of mica, 3 parts of aluminium oxide, 4 parts of aramid fiber.
Preferably, in the raw material of the buffer layer and ceramic layer, powder stuffing granularity≤150 mesh.
Preferably, the thickness of the buffer layer and ceramic layer ratio is 1:(2~5), preferably 1:3.
Preferably, the thickness of the buffer layer and ceramic layer and be 15~25mm.
The present invention also provides the preparation methods of the disk brake pad, comprising the following steps:
(1) by each raw material investment batch mixer of buffer layer, buffer layer mixing buffer layer mixing: is obtained after the completion of mixing
Material；
(2) by each raw material investment batch mixer of ceramic layer, ceramic layer mixing ceramic layer mixing: is obtained after the completion of mixing
Material；
(3) hot-forming: steel back, buffer layer mixture and ceramic layer mixture to be sequentially placed into mold, using surely close
Level specific pressure machine pressing process is spent, hot pressing obtains the disk brake pad.
Preferably, before step (1), sandblasting polishing first is carried out to steel back, is then sprayed in the contact surface of steel back and buffer layer
High-temperature plastic, in other each face spraying noise reduction damping paints of steel back.
Preferably, after the completion of the mixing of step (2), ferromanganese block is put into ceramic layer mixture and is then taken out, if
The powdery alloy of adsorption is uniformly distributed then mixing qualification, mixes if conglomeration packing phenomenon occurs in the powdery alloy of adsorption
Expect unqualified.
Preferably, in step (3), pressure controls error≤0.3MPa, and temperature controls error≤5 DEG C, passes through the program-controlled control of PLC
Pressing time processed.
Preferably, after the completion of the mixing of step (3), if mixture height be 100cm, respectively at the 5cm of truck bottom,
At 35cm, at 75cm sampling carry out heap Density Detection, mixing is unqualified if heap density contrast is greater than 5% at three.
The invention has the benefit that
The present invention provides a kind of low abrasion disk brake pads, by being added between steel back and ceramic layer containing the material that is magnetic
The buffer layer of material, has the advantage that
(1) it due to being added to magnetic material into buffer layer, can be improved bonding between buffer layer and steel back faying face
Property, friction material buffer layer is fallen from steel back emaciated face when effectivelying prevent because of braking high temperature (400~500 DEG C), leads to brake failure
Accident.And increase the adhesive strength between friction plate and steel back.
(2) buffer layer can be used as the noise reducing damping layer of friction plate, can change the intrinsic frequency of friction plate and steel back entirety.
After magnetic material especially is added, during friction plate is hot-forming, the magnetic material in buffer layer mixing can absorbent ceramic
Iron tramp and other iron alloys in layer mixing make above-mentioned ferrous contaminants be gathered in buffer layer and pottery under ambient pressure effect
The engaging portion of enamel coating, thus:
A, increase the shear strength between buffer layer and ceramic layer；
B, it avoids rubbing surface from irony hard spot occur, eliminates the treble generated in braking process and braking is trembled；
C, the brake disc scratch generated by irony hard spot and groove are avoided, the service life of brake disc is improved；
D, it avoids groove or excessive wear occur because irony hard spot generates friction plate working face, improves friction plate and use the longevity
Life；
E, working face, i.e., the irony hard spot of contact surface when brake disc and friction plate ceramic layer are braked, for system every time are eliminated
It is dynamic that more stable coefficient of friction is provided.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of low abrasion disk brake pad of the present invention.
Fig. 2 is the coefficient of friction and temperature change relational graph of embodiment 1 and comparative example.
In figure: 1- steel back；2- buffer layer；3- ceramic layer.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
As shown in Figure 1, the disk brake pad includes successively pasting the present embodiments relate to a kind of low abrasion disk brake pad
Steel back 1, buffer layer 2 and the ceramic layer 3 of conjunction.
Wherein, the main function of steel back is the friction materials such as fixed ceramic layer.During the preparation process, the friction material of powdery
At high temperature under high pressure occur chemistry and physical action, be pressed into steel back, form the friction plate of integral structure, play noise reduction, every
Heat and buffer function.Can also be first separately formed by ceramic layer, then bonded with steel back.But this mode will lead to the two and combine
Power is inadequate, and the failures such as braking shake, brake noise occur the frequency and increase.
Buffer layer is by including that the raw material of following parts by weight is prepared: 10~20 parts of glass fibre, vermiculite 1~10
Part, 7~15 parts of phenolic resin, 15~25 parts of precipitated calcium carbonate, 2~8 parts of flaxen fiber, 1~10 part of calcium hydroxide, neodymium iron boron powdery
1~10 part of alloy, 1~10 part of petroleum coke powdered carbon, 7~15 parts of mineral fibres, 6~13 parts of EPDM rubber powder, barium sulfate 1~10
Part.
Ceramic layer is by including that the raw material of following parts by weight is prepared: 7~15 parts of carbon fiber, 6~13 parts of ceramic fibre,
10~20 parts of precipitated calcium carbonate, 10~20 parts of phenolic resin, 1~7 part of calcium hydroxide, 7~15 parts of diatomite, barium sulfate 10~20
Part, 4~10 parts of graphite, 1~10 part of petroleum coke powdered carbon, 1~7 part of mica, 1~7 part of aluminium oxide, 1~7 part of aramid fiber.
In the above-mentioned raw material for preparing buffer layer and ceramic layer, phenolic resin is thermostable phenolic resin, such as B4What C was modified
Phenolic resin can be with resistance to 1000 DEG C or more of high temperature.
Precipitated calcium carbonate is also known as winnofil, the weight that settling volume (2.4-2.8mL/g) ratio mechanically produces
Matter calcium carbonate settling volume (1.1-1.9mL/g) greatly, therefore referred to as precipitated calcium carbonate.Precipitated calcium carbonate is nontoxic, odorless, stingless
Swash property, usually white, relative density is 2.7~2.9；Settling volume 2.5ml/g or more, specific surface area 5m2/ g or so.
Nd Fe B alloys are also known as neodium magnet, are by neodymium, iron, boron (Nd2Fe14B) the tetragonal crystal formed.It has
Excellent magnetic property is most-often used rare-earth magnet.
Petroleum coke is that crude oil is distilled after the separation of weight matter oil, product that mink cell focus is transformed through hot tearing again.From
It sees in appearance, petroleum coke is black bulk or particle in irregular shape, not of uniform size, there is metallic luster, the particle of coke
Has multi-pore structure.
Mineral fibres is using ore as raw material.Such asMineral fibres uses the ores such as basalt for raw material, warp
Pretreatment is reeled off raw silk from cocoons in 1500 DEG C of high-temperature fusions, refinement and is surface-treated through special.The product of mineral fibres
Matter is by ISO 9001:2000 quality certification system requirement through the production and service of entire product.The softening point of mineral fibres
About 1200 DEG C, fiber smooth in appearance is complete, safe to use not will cause human injury.
EPDM rubber is ethylene propylene diene rubber, is by the copolymer of ethylene, propylene and a small amount of non-conjugated diene hydrocarbon.Because of it
Main chain is made of chemically stable saturated hydrocarbons, only contains unsaturated double-bond in the side chain, therefore its resistance to ozone, heat-resisting, weather-proof etc.
Ageing-resistant performance is excellent, can be widely used for automobile component, building water-proof material, electric wire and cable jacket, heat-resistant rubber hose, adhesive tape,
The fields such as automotive sealant.
In one particular embodiment of the present invention, buffer layer is by including that the raw material of following parts by weight is prepared: glass
15 parts of glass fiber, 5 parts of vermiculite, 13 parts of phenolic resin, 20 parts of precipitated calcium carbonate, 5 parts of flaxen fiber, 5 parts of calcium hydroxide, Nd-Fe-B powder
6 parts of shape alloy, 5 parts of petroleum coke powdered carbon, 10 parts of mineral fibres, 8 parts of EPDM rubber powder, 6 parts of barium sulfate.
In one particular embodiment of the present invention, ceramic layer is by including that the raw material of following parts by weight is prepared: carbon
10 parts of fiber, 101 8 parts of ceramic fibre, 14 parts of precipitated calcium carbonate, 16 parts of phenolic resin, 4 parts of calcium hydroxide, 10 parts of diatomite,
15 parts of barium sulfate, 6 parts of graphite, 6 parts of petroleum coke powdered carbon, 4 parts of mica, 3 parts of aluminium oxide, 4 parts of aramid fiber.
In one embodiment of the invention, in order to guarantee it is hot-forming after obtained plane effect, buffer layer and ceramics
Layer raw material in powder stuffing granularity≤150 mesh.
Due to the thickness of disk brake pad be it is certain, under the premise of steel back thickness is constant, buffer layer, which thickens, to be reduced
The thickness of ceramic layer.Cause the frictional force in braking process between friction plate working face and brake disc to reduce, is easy initiation accident.
Therefore the thickness of buffer layer cannot be excessive, at the same in the too small buffer layer of thickness magnetic material content it is lower, can not play and fill
Divide the effect of iron impurities in absorbent ceramic layer.In one embodiment of the invention, the thickness of buffer layer and ceramic layer and it is
15~25mm.Wherein the thickness of buffer layer and ceramic layer ratio is 1:(2~5), preferably 1:3.
The embodiment of the invention also provides the preparation methods of disk brake pad, comprising the following steps:
(1) steel back is surface-treated: being carried out sandblasting polishing to steel back, is then sprayed resistance to height in the contact surface of steel back and buffer layer
Warm glue, in other each face spraying noise reduction damping paints of steel back.
Wherein, high-temperature plastic can use phenolic resin liquid glue, and viscosity is 1500~1700 (25 DEG C of CP), free phenol
Content≤1.0%, 5~6min of gel time.
The raw material weight composition of noise reduction damping paint are as follows: above-mentioned phenolic resin liquid glue 45%, diluent 35%, mica
10%, wood powder 10%, after above-mentioned raw materials are stirred and evenly mixed to obtain the final product.Its viscosity is 150~200 (25 DEG C of CP).
(2) buffer layer mixing: feeding intake using PLC is program-controlled, by each raw material of buffer layer according to fiber-like material, organic resin
Class material, powder body material sequence be added plough type batch mixer in carry out it is dry-mixed, mixing time be 8~10min, obtain buffer layer
Mixture.
After the completion of mixing, ferromanganese block is put into ceramic layer mixture and is then taken out, if the powdery of adsorption closes
Gold is uniformly distributed then mixing qualification, and mixing is unqualified if conglomeration packing phenomenon occurs in the powdery alloy of adsorption.
(3) ceramic layer mixing: feeding intake using PLC is program-controlled, by each raw material of ceramic layer according to fiber-like material, organic resin
Class material, powder body material sequence be added in plough type batch mixer and carry out dry-mixed, ceramic layer mixture is obtained after the completion of mixing.
After the completion of mixing, if mixture height is 100cm, sampled at the 5cm of truck bottom, at 35cm, at 75cm respectively
Heap Density Detection is carried out, mixing is unqualified if heap density contrast is greater than 5% at three.
(4) hot-forming: steel back, buffer layer mixture and ceramic layer mixture to be sequentially placed into mold, using surely close
Spend level specific pressure machine pressing process.One cylinder, one mould, production press use 25 tons of level specific pressure machines of single cylinder.Pressure controls error during being somebody's turn to do
≤ 0.3MPa, temperature control error≤5 DEG C and obtain disk brake pad by the PLC program-controlled control pressing time.
Embodiment 1
A kind of disk brake pad, including steel back, buffer layer and the ceramic layer being successively bonded.
Wherein, buffer layer is by including that the raw material of following parts by weight is prepared: 15 parts of glass fibre, 5 parts of vermiculite, and phenolic aldehyde
13 parts of resin, 20 parts of precipitated calcium carbonate, 5 parts of flaxen fiber, 5 parts of calcium hydroxide, 6 parts of neodymium iron boron powdery alloy, petroleum coke powdered carbon 5
Part, 10 parts of mineral fibres, 8 parts of EPDM rubber powder, 6 parts of barium sulfate.
Ceramic layer is by including that the raw material of following parts by weight is prepared: 10 parts of carbon fiber, 101 8 parts of ceramic fibre, gently
14 parts of matter calcium carbonate, 16 parts of phenolic resin, 4 parts of calcium hydroxide, 10 parts of diatomite, 15 parts of barium sulfate, 6 parts of graphite, petroleum coke
6 parts of powder, 4 parts of mica, 3 parts of aluminium oxide, 4 parts of aramid fiber.
In the raw material of buffer layer and ceramic layer powder stuffing granularity≤150 mesh.The thickness of buffer layer and ceramic layer ratio is
1:3, the thickness of the two and be 20mm.
The disk brake pad is prepared by the following method to obtain:
(1) steel back is surface-treated: being carried out sandblasting polishing to steel back, is then sprayed phenolic aldehyde in the contact surface of steel back and buffer layer
Resin liquid glue, in other each face spraying noise reduction damping paints of steel back.
(2) buffer layer mixing: feeding intake using PLC is program-controlled, by each raw material of buffer layer according to fiber-like material, organic resin
Class material, powder body material sequence be added plough type batch mixer in carry out it is dry-mixed, mixing time be 8~10min, obtain buffer layer
Mixture.
(3) ceramic layer mixing: feeding intake using PLC is program-controlled, by each raw material of ceramic layer according to fiber-like material, organic resin
Class material, powder body material sequence be added in plough type batch mixer and carry out dry-mixed, ceramic layer mixture is obtained after the completion of mixing.
(4) hot-forming: steel back, buffer layer mixture and ceramic layer mixture to be sequentially placed into mold, using surely close
Spend level specific pressure machine pressing process.One cylinder, one mould, production press use 25 tons of level specific pressure machines of single cylinder.Pressure controls error during being somebody's turn to do
≤ 0.3MPa, temperature control error≤5 DEG C and obtain disk brake pad by the PLC program-controlled control pressing time.
Comparative example 1
Neodymium iron boron powdery alloy is not added in buffer layer, other raw materials and preparation process are the same as embodiment 1.
Test case
According to GB5763-2008, constant speed detection is carried out to the friction plate that embodiment 1 and comparative example 1 obtain.Table 1 is difference
At a temperature of, the coefficient of friction and wear rate of embodiment 1 and 1 disk brake pad of comparative example.
Table 1
Fig. 2 is the coefficient of friction and temperature change relational graph of embodiment 1 and comparative example 1.Wherein abscissa is temperature (unit
For DEG C), ordinate is coefficient of friction.
From table 1 and Fig. 2 it is found that magnetic material is added into buffer layer, i.e., after neodymium iron boron powdery alloy, coefficient of friction is not
More stable under synthermal, wear rate is smaller.Illustrate, when ceramic layer and brake disc, to drop using the solution of the present invention
The low abrasion generated by irony hard spot reduces pulling for dual face brake disc.
According to the data that constant speed testing machine measures, the record friction plate that embodiment 1 and comparative example 1 obtain at different temperatures
In, the shear strength between buffer layer and ceramic layer and between buffer layer and steel back the results are shown in Table 2.
Table 2
Table 2 illustrates, at different temperatures, in embodiment 1 between buffer layer and ceramic layer and between buffer layer and steel back
Shear strength be apparently higher than comparative example 1.
Embodiment 2~5
In embodiment 2~5, change the thickness ratio of buffer layer and ceramic layer and the additional amount of magnetic material, other raw materials
With preparation process with embodiment 1.Wear rate at corresponding running parameter and 100 DEG C is shown in Table 3.
Table 3
As known from Table 3, when the thickness of buffer layer and ceramic layer compares not in the range of 1:3 or the additional amount of magnetic material
After variation, wear rate can rise.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of low abrasion disk brake pad, which is characterized in that the disk brake pad includes the steel back being successively bonded, buffer layer
And ceramic layer, wherein
The buffer layer is by including that the raw material of following parts by weight is prepared: 10~20 parts of glass fibre, 1~10 part of vermiculite,
7~15 parts of phenolic resin, 15~25 parts of precipitated calcium carbonate, 2~8 parts of flaxen fiber, 1~10 part of calcium hydroxide, neodymium iron boron powdery closes
1~10 part, 1~10 part of petroleum coke powdered carbon, 7~15 parts of mineral fibres, 6~13 parts of EPDM rubber powder, 1~10 part of barium sulfate of gold；
The ceramic layer is by including that the raw material of following parts by weight is prepared: 7~15 parts of carbon fiber, 6~13 parts of ceramic fibre,
10~20 parts of precipitated calcium carbonate, 10~20 parts of phenolic resin, 1~7 part of calcium hydroxide, 7~15 parts of diatomite, barium sulfate 10~20
Part, 4~10 parts of graphite, 1~10 part of petroleum coke powdered carbon, 1~7 part of mica, 1~7 part of aluminium oxide, 1~7 part of aramid fiber.
2. disk brake pad according to claim 1, which is characterized in that the buffer layer is by including following parts by weight
Raw material is prepared: 15 parts of glass fibre, 5 parts of vermiculite, and 13 parts of phenolic resin, 20 parts of precipitated calcium carbonate, 5 parts of flaxen fiber, hydrogen-oxygen
Change 5 parts of calcium, 6 parts of neodymium iron boron powdery alloy, 5 parts of petroleum coke powdered carbon, 10 parts of mineral fibres, 8 parts of EPDM rubber powder, 6 parts of barium sulfate.
3. disk brake pad according to claim 1, which is characterized in that the ceramic layer is by including following parts by weight
Raw material is prepared: 10 parts of carbon fiber, 101 8 parts of ceramic fibre, and 14 parts of precipitated calcium carbonate, 16 parts of phenolic resin, calcium hydroxide 4
Part, 10 parts of diatomite, 15 parts of barium sulfate, 6 parts of graphite, 6 parts of petroleum coke powdered carbon, 4 parts of mica, 3 parts of aluminium oxide, 4 parts of aramid fiber.
4. disk brake pad according to claim 1, which is characterized in that in the raw material of the buffer layer and ceramic layer, powder
Body filler particle size≤150 mesh.
5. disk brake pad according to claim 1, which is characterized in that the thickness of the buffer layer and ceramic layer ratio is 1:
(2~5), preferably 1:3.
6. disk brake pad according to claim 1, which is characterized in that the thickness of the buffer layer and ceramic layer and be 15
~25mm.
7. according to claim 1 to the preparation method of any one of 6 disk brake pads, which comprises the following steps:
(1) by each raw material investment batch mixer of buffer layer, buffer layer mixture buffer layer mixing: is obtained after the completion of mixing；
(2) by each raw material investment batch mixer of ceramic layer, ceramic layer mixture ceramic layer mixing: is obtained after the completion of mixing；
(3) hot-forming: steel back, buffer layer mixture and ceramic layer mixture to be sequentially placed into mold, using determining density etc.
Than press pressing process, hot pressing obtains the disk brake pad.
8. the method according to the description of claim 7 is characterized in that first carrying out sandblasting polishing to steel back, then before step (1)
High-temperature plastic is sprayed in the contact surface of steel back and buffer layer, in other each face spraying noise reduction damping paints of steel back.
9. the method according to the description of claim 7 is characterized in that ferromanganese block is put into after the completion of the mixing of step (2)
It is then taken out in ceramic layer mixture, mixing is qualified if the powdery alloy of adsorption is uniformly distributed, if the powder of adsorption
Conglomeration packing phenomenon occurs in shape alloy, and then mixing is unqualified.
10. the method according to the description of claim 7 is characterized in that pressure controls error≤0.3MPa, temperature in step (3)
Error≤5 DEG C are controlled, the PLC program-controlled control pressing time is passed through.
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