CN105715719A - High-heat-conductivity semimetal brake block - Google Patents

High-heat-conductivity semimetal brake block Download PDF

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Publication number
CN105715719A
CN105715719A CN201610161861.7A CN201610161861A CN105715719A CN 105715719 A CN105715719 A CN 105715719A CN 201610161861 A CN201610161861 A CN 201610161861A CN 105715719 A CN105715719 A CN 105715719A
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China
Prior art keywords
graphite
crystalline flake
brake block
rubbing surface
flake graphite
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Application number
CN201610161861.7A
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Chinese (zh)
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CN105715719B (en
Inventor
郭志猛
赵翔
郝俊杰
罗骥
邵慧萍
陈存广
张晓东
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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Priority to CN201610161861.7A priority Critical patent/CN105715719B/en
Publication of CN105715719A publication Critical patent/CN105715719A/en
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Publication of CN105715719B publication Critical patent/CN105715719B/en
Expired - Fee Related legal-status Critical Current
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02Composition of linings ; Methods of manufacturing
    • F16D69/023Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/14Anti-slip materials; Abrasives
    • C09K3/149Antislip compositions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02Composition of linings ; Methods of manufacturing
    • F16D69/027Compositions based on metals or inorganic oxides
    • F16D69/028Compositions based on metals or inorganic oxides containing fibres
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00Materials; Production methods therefor
    • F16D2200/0004Materials; Production methods therefor metallic
    • F16D2200/0008Ferro
    • F16D2200/0021Steel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00Materials; Production methods therefor
    • F16D2200/0034Materials; Production methods therefor non-metallic
    • F16D2200/0052Carbon
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00Materials; Production methods therefor
    • F16D2200/006Materials; Production methods therefor containing fibres or particles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00Materials; Production methods therefor
    • F16D2200/0082Production methods therefor
    • F16D2200/0086Moulding materials together by application of heat and pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00Manufacturing; Assembly
    • F16D2250/0061Joining

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention discloses a manufacturing method of a high-heat-conductivity semimetal brake block, and belongs to the field of automobile braking systems. Crystalline flake graphite, graphite short fibers, carbon nano tubes and other anisotropic carbon materials with heat conducting coefficients are utilized, and the high-heat-conductivity high-graphite semimetal brake block with the crystalline flake graphite distributed perpendicular to the friction surface orientation in a matrix is manufactured through a method for bidirectional pressing in the direction perpendicular to the friction surface. The heat conducting coefficient of the brake block is improved by 2-3 times, heat resistance and wear resistance are greatly improved, and noise is lowered. In addition, due to the fact that the heat conducting coefficient, in the horizontal direction, of the crystalline flake graphite is far larger than that of copper, copper can be prevented from being added to the material through orientation distribution of the crystalline flake graphite, and pollution of copper to the environment is avoided.

Description

A kind of high heat conduction semi-metallic brake pad
Technical field
The present invention relates to a kind of semimetal braking friction material, belong to high speed, for motor vehicle field of brake pad of high-powered car.In particular, providing the brake block technology of preparing of a kind of thermal conductivity anisotropic utilizing graphite, solve vehicle semi-metallic brake pad heat conduction, poor heat resistance, noise is big, and antithesis mill is damaged big problem.
Technical background
One of brakes on vehicle most important security system being to ensure that vehicle safe driving, brake block in brakes and brake disc are the core components of brakes, it is the direct supplier of brake force, brake block and the friction of antithesis dish Mechanical Contact is made by applying external force, produce braking moment, the kinetic energy of vehicle is changed into heat energy, in car braking process, temperature on the rubbing surface of brake block and antithesis dish is up to 300~400 DEG C, and at high speed, high-power vehicle is even up to 500 DEG C.This just requires that brake block is when ensureing to have enough coefficient of frictions and relatively low wear extent, and heat conduction, thermostability also to be got well.
Invent, from HerbertFrood in 1897, the resin base brake block that first piece is fortifying fibre with hair and cotton thread to have pass by more than 100 year.During this, for meeting the user demand of vehicle high-speed degree and high-power, brake material is through updating, and its performance improves constantly.It is applied to the conventional brake block at high speed and on high-power vehicle at present and mainly includes semi-metallic, powdered metallurgical material and C/C composite.Owing to semi-metallic adopts steel and copper fiber as reinforcing agent, improve heat conduction and the thermostability of material, but noise is relatively larger, and antithesis adjustment debit wound is bigger.Powdered metallurgical material heat conduction and heat-resisting quantity are good, but brakeweight is big, noise is big, fragility is big, it is big that antithesis is damaged, and is normally only used for special occasions.C/C Modulus of Composites is high, conduction of heat and heat-resist, and absorption per unit area power is high, and proportion is little.But at present carbon fiber yield is little, price, limit the application of C/C composite friction material.
In conventional semi-metallic brake pad material, the content of Reinforced by Metal fiber and graphite is higher, and in representative formula, consumption is up to more than half.Wherein there is the heavy metal of contaminative, if copper fiber or copper powder consumption are 5%~30%, environment is had certain contaminative.Under the preparation technology of conventional brake block, the arrangement mode of the crystalline flake graphite in semi-metallic brake pad is parallel to rubbing surface.So under the effect of shear stress, it will be easily caused coming off of crystalline flake graphite, destroying the integrity of rubbing surface, disruptive oxidation film, rubbing surface is destroyed by oxide-film fragment further that come off, causes heavy wear, and this is also the main cause causing noise big.It is parallel to rubbing surface distribution additionally, due to crystalline flake graphite, causes that the performance of crystalline flake graphite height heat conduction can not get playing, even can reduce, have a strong impact on heat conduction and the thermostability of material.
Summary of the invention
For above technical problem, the present invention provides a kind of high heat conduction semi-metallic brake pad, by the improvement of pressing technology, design one and be different from the new drawing method (Fig. 2) of conventional pressure method (Fig. 1), as shown in Fig. 2 (a), the new drawing method of the present invention is left and right horizontal Bidirectional-pressure, is different from upper pressure (the vertical individual event compacting) method of conventional pressurization.The blank compressing through new drawing method is overlapped mutually by identical graphite arrangement mode, then connected together by backboard, form a piece of complete brake block (in friction piece, graphite length direction is perpendicular to backboard), this brake block is that a kind of crystalline flake graphite is perpendicular to rubbing surface distribution (being perpendicular to pressing direction), there is the brake block of graphite orientation, as shown in Fig. 2 (b).This kind of brake block not only reduces the wear rate of brake block itself and antithesis, additionally it is possible to make the heat conductivity of brake block improve 2~3 times, even higher, is greatly improved the thermostability of material, and this will lead the historic change of brake block research field.
The preparation method of a kind of high heat conduction semi-metallic brake pad, is characterized in that: by being perpendicular to the way of the two-way compacting in rubbing surface direction, it is achieved the material with carbon element with heat conductivity anisotropic is perpendicular to rubbing surface direction distribution of orientations.
The concrete preparation process of preparation method of a kind of high heat conduction semi-metallic brake pad described above is: brake block raw material consists of: 10~15wt% barium sulfate Φ 100 μm, 5~10wt% potassium titanate 100 μm, 75 μm of 5~10wt% calcium fluoride, 1~10wt% antimonous sulfide 75 μm, and 15~20wt% has the material with carbon element 300 μm of heat conductivity anisotropic, 25~35wt% steel fibre 0.5mm and 10~20wt% nbr modified phenolic resins 100 μm;
By above-mentioned each component dispensing in proportion and in batch mixer mix homogeneously, under 150~170 DEG C and 32~38MPa hot-forming, pressing mode is different from upper pressure (the vertical individual event compacting) method of conventional pressurization, adopt left and right horizontal Bidirectional-pressure, pressing direction is parallel with rubbing surface direction, as shown in Fig. 2 (a).Compressing blank is overlapped mutually by identical graphite arrangement mode, is then connected together by backboard, forms a piece of complete brake block, obtains the semi finished brake disc of crystalline flake graphite and the vertical orientated arrangement of rubbing surface, as shown in Fig. 2 (b).After through 160~220 DEG C of heat treatment 10~15h, obtain high heat conduction semi-metallic brake pad finished product.
It is crystalline flake graphite, graphite chopped fiber or CNT etc. that the squama added in material has the material with carbon element of heat conductivity anisotropic.
Advantages of the present invention
1. break the normal procedure the heat pressing process of semi-metallic brake pad, adopt the technique being parallel to rubbing surface direction Bidirectional-pressure.Improve the shear strength along rubbing surface direction, improve wearability.
2. crystalline flake graphite arranges by the direction being perpendicular to rubbing surface and the heat conductivity of material can be made to improve 2~3 times, even higher.Being firmly combined with matrix owing to crystalline flake graphite is perpendicular to the direction arrangement of rubbing surface, difficult drop-off, the thermostability of crystalline flake graphite can effectively ensure that the thermostability of brake pad material.
3., owing to crystalline flake graphite is by the direction orientations being perpendicular to rubbing surface, it is firmly combined with matrix, difficult drop-off, and friction surface layer is played certain protective role, the wearability of material can be improved.
4. this high heat conduction semi-metallic brake pad due to heat conduction, heat-resisting, anti-wear performance is excellent, can be applied to high-speed overload vehicle.
Accompanying drawing explanation
Fig. 1 is the arrangement mode schematic diagram of crystalline flake graphite in conventional pressing mode and brake block
(a) conventional drawing method
The arrangement mode of crystalline flake graphite in (b) brake block
Wherein: 1. crystalline flake graphite;2. matrix;3. friction surface;4. upper punch;
Fig. 2 is the arrangement mode schematic diagram that the present invention is parallel to crystalline flake graphite in rubbing surface pressing mode and brake block
A () is parallel to rubbing surface drawing method
The arrangement mode of crystalline flake graphite in (b) brake block
1. crystalline flake graphite;2. matrix;3. friction surface;5. left drift;6. right drift;7. backboard
Detailed description of the invention
Embodiment 1
A kind of semi-metallic brake pad, by 10% barium sulfate Φ 100 μm, 10% potassium titanate 100 μm, 75 μm of 10% calcium fluoride, 1% antimonous sulfide 75 μm, 20% crystalline flake graphite 300 μm, 29% steel fibre 0.5mm and 20% nbr modified phenolic resins 100 μm.
By above-mentioned each component dispensing in proportion and in batch mixer mix homogeneously, under 160 DEG C and 35MPa hot-forming, pressing mode is different from upper pressure (the vertical individual event compacting) method of conventional pressurization, adopts left and right horizontal Bidirectional-pressure, and pressing direction is parallel with rubbing surface direction.Compressing blank is overlapped mutually by identical graphite arrangement mode, is then connected together by backboard, forms a piece of complete brake block, obtains the semi finished brake disc of crystalline flake graphite and the vertical orientated arrangement of rubbing surface.After through 160~220 DEG C of heat treatment 10h, obtain high heat conduction semi-metallic brake pad finished product.100w/m k is reached along vertical and rubbing surface direction heat conductivity.
Embodiment 2
A kind of semi-metallic brake pad, by 15% barium sulfate Φ 100 μm, 5% potassium titanate 100 μm, 75 μm of 5% calcium fluoride, 10% antimonous sulfide 75 μm, 15% crystalline flake graphite 300 μm, 35% steel fibre 0.5mm and 15% nbr modified phenolic resins 100 μm.
By above-mentioned each component dispensing in proportion and in batch mixer mix homogeneously, under 160 DEG C and 35MPa hot-forming, pressing mode is different from upper pressure (the vertical individual event compacting) method of conventional pressurization, adopts left and right horizontal Bidirectional-pressure, and pressing direction is parallel with rubbing surface direction.Compressing blank is overlapped mutually by identical graphite arrangement mode, is then connected together by backboard, forms a piece of complete brake block, obtains the semi finished brake disc of crystalline flake graphite and the vertical orientated arrangement of rubbing surface.After through 160~220 DEG C of heat treatment 12h, obtain high heat conduction semi-metallic brake pad finished product.96w/m k is reached along vertical and rubbing surface direction heat conductivity.
Embodiment 3
A kind of semi-metallic brake pad, by 14% barium sulfate Φ 100 μm, 8% potassium titanate 100 μm, 75 μm of 8% calcium fluoride, 8% antimonous sulfide 75 μm, 19% crystalline flake graphite 300 μm, 25% steel fibre 0.5mm and 18% nbr modified phenolic resins 100 μm.
By above-mentioned each component dispensing in proportion and in batch mixer mix homogeneously, under 160 DEG C and 35MPa hot-forming, pressing mode is different from upper pressure (the vertical individual event compacting) method of conventional pressurization, adopts left and right horizontal Bidirectional-pressure, and pressing direction is parallel with rubbing surface direction.Compressing blank is overlapped mutually by identical graphite arrangement mode, is then connected together by backboard, forms a piece of complete brake block, obtains the semi finished brake disc of crystalline flake graphite and the vertical orientated arrangement of rubbing surface.After through 160~220 DEG C of heat treatment 12h, obtain high heat conduction semi-metallic brake pad finished product.102w/m k is reached along vertical and rubbing surface direction heat conductivity.
Embodiment 4
A kind of semi-metallic brake pad, by 10% barium sulfate Φ 100 μm, 10% potassium titanate 100 μm, 75 μm of 10% calcium fluoride, 5% antimonous sulfide 75 μm, 20% crystalline flake graphite 300 μm, 35% steel fibre 0.5mm and 10% nbr modified phenolic resins 100 μm.
By above-mentioned each component dispensing in proportion and in batch mixer mix homogeneously, under 160 DEG C and 35MPa hot-forming, pressing mode is different from upper pressure (the vertical individual event compacting) method of conventional pressurization, adopts left and right horizontal Bidirectional-pressure, and pressing direction is parallel with rubbing surface direction.Compressing blank is overlapped mutually by identical graphite arrangement mode, is then connected together by backboard, forms a piece of complete brake block, obtains the semi finished brake disc of crystalline flake graphite and the vertical orientated arrangement of rubbing surface.After through 160~220 DEG C of heat treatment 15h, obtain high heat conduction semi-metallic brake pad finished product.105w/m k is reached along vertical and rubbing surface direction heat conductivity.

Claims (3)

1. the preparation method of one kind high heat conduction semi-metallic brake pad, it is characterised in that: by being perpendicular to the way of the two-way compacting in rubbing surface direction, it is achieved the material with carbon element with heat conductivity anisotropic is perpendicular to rubbing surface direction distribution of orientations.
2. the preparation method of a kind of high heat conduction semi-metallic brake pad as claimed in claim 1, it is characterized in that: concrete preparation process is: brake block raw material consists of: 10~15wt% barium sulfate Φ 100 μm, 5~10wt% potassium titanate 100 μm, 75 μm of 5~10wt% calcium fluoride, 1~10wt% antimonous sulfide 75 μm, and 15~20wt% has the material with carbon element 300 μm of heat conductivity anisotropic, 25~35wt% steel fibre 0.5mm and 10~20wt% nbr modified phenolic resins 100 μm;
By above-mentioned each component dispensing in proportion and in batch mixer mix homogeneously, under 150~170 DEG C and 32~38MPa hot-forming, pressing mode adopts left and right horizontal Bidirectional-pressure, pressing direction is parallel with rubbing surface direction, compressing blank is overlapped mutually by identical graphite arrangement mode, then connected together by backboard, form a piece of complete brake block, obtain the semi finished brake disc of crystalline flake graphite and the vertical orientated arrangement of rubbing surface, after through 160~220 DEG C of heat treatment 10~15h, obtain high heat conduction semi-metallic brake pad finished product.
3. the preparation method of a kind of high heat conduction semi-metallic brake pad as claimed in claim 1, it is characterised in that: it is crystalline flake graphite, graphite chopped fiber or CNT that the squama added in material has the material with carbon element of heat conductivity anisotropic.
CN201610161861.7A 2016-03-21 2016-03-21 A kind of high heat conduction semi-metallic brake pad Expired - Fee Related CN105715719B (en)

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Application Number Priority Date Filing Date Title
CN201610161861.7A CN105715719B (en) 2016-03-21 2016-03-21 A kind of high heat conduction semi-metallic brake pad

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CN105715719B CN105715719B (en) 2018-02-02

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1754050A (en) * 2003-01-24 2006-03-29 布拉德原料产品公司 Carbon fiber friction material
CN101055008A (en) * 2006-04-11 2007-10-17 Sgl碳股份公司 Method for preparing shaped bodies from carbon fibre reinforced carbon
CN101205456A (en) * 2007-11-27 2008-06-25 信义集团公司 Method for preparing brake block by calcium carbonate crystal whisker
US20130224479A1 (en) * 2012-02-29 2013-08-29 Covalent Materials Corporation Carbon-fiber-reinforced silicon-carbide-based composite material and braking material
CN103603906A (en) * 2013-11-19 2014-02-26 青岛广联达精密机械有限公司 High-temperature-resistant automotive brake pad
DE102013009955A1 (en) * 2013-06-13 2014-12-18 Daimler Ag Component with wear-resistant friction layer
CN105240429A (en) * 2015-10-27 2016-01-13 张荣斌 Vanadium-contained semimetallic brake block
CN105257747A (en) * 2014-07-10 2016-01-20 罗伯特·博世有限公司 Method and Apparatus for Producing a Brake Lining, Brake Lining

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1754050A (en) * 2003-01-24 2006-03-29 布拉德原料产品公司 Carbon fiber friction material
CN101055008A (en) * 2006-04-11 2007-10-17 Sgl碳股份公司 Method for preparing shaped bodies from carbon fibre reinforced carbon
CN101205456A (en) * 2007-11-27 2008-06-25 信义集团公司 Method for preparing brake block by calcium carbonate crystal whisker
US20130224479A1 (en) * 2012-02-29 2013-08-29 Covalent Materials Corporation Carbon-fiber-reinforced silicon-carbide-based composite material and braking material
DE102013009955A1 (en) * 2013-06-13 2014-12-18 Daimler Ag Component with wear-resistant friction layer
CN103603906A (en) * 2013-11-19 2014-02-26 青岛广联达精密机械有限公司 High-temperature-resistant automotive brake pad
CN105257747A (en) * 2014-07-10 2016-01-20 罗伯特·博世有限公司 Method and Apparatus for Producing a Brake Lining, Brake Lining
CN105240429A (en) * 2015-10-27 2016-01-13 张荣斌 Vanadium-contained semimetallic brake block

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