WO2014109328A1 - Matériau de frottement - Google Patents

Matériau de frottement Download PDF

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Publication number
WO2014109328A1
WO2014109328A1 PCT/JP2014/050133 JP2014050133W WO2014109328A1 WO 2014109328 A1 WO2014109328 A1 WO 2014109328A1 JP 2014050133 W JP2014050133 W JP 2014050133W WO 2014109328 A1 WO2014109328 A1 WO 2014109328A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction material
friction
material composition
total amount
weight
Prior art date
Application number
PCT/JP2014/050133
Other languages
English (en)
Japanese (ja)
Inventor
恭輝 服部
利也 高田
Original Assignee
日清紡ブレーキ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日清紡ブレーキ株式会社 filed Critical 日清紡ブレーキ株式会社
Publication of WO2014109328A1 publication Critical patent/WO2014109328A1/fr

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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
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing
    • F16D69/025—Compositions based on an organic binder
    • F16D69/026—Compositions based on an organic binder containing fibres
    • 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
    • F16D2200/0065—Inorganic, e.g. non-asbestos mineral fibres
    • 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
    • F16D2200/0073—Materials; Production methods therefor containing fibres or particles having lubricating properties
    • 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
    • F16D2200/0082—Production methods therefor
    • F16D2200/0086—Moulding materials together by application of heat and pressure

Definitions

  • the present invention relates to a friction material obtained by molding a friction material composition of NAO (Non-Asbestos-Organic) material used for a disc brake pad.
  • NAO Non-Asbestos-Organic
  • a disc brake is used as a braking device for a passenger car, and a disc brake pad in which a friction material is attached to a base member made of metal such as steel or resin is used as the friction member.
  • the friction material includes a semi-metallic friction material containing 30% by weight or more and less than 60% by weight of steel fiber as a fiber base material, and steel fiber in a part of the fiber base material. Are classified into a low steel friction material containing less than 30% by weight with respect to the total amount of the friction material composition, and a NAO material that does not include steel fibers such as steel fibers and stainless fibers as a fiber base material.
  • copper components such as copper or copper alloy fibers or particles are essential components in order to satisfy strict required performance. About 0 to 20.0% by weight is added.
  • Friction mechanism and thermal conductivity characteristics of copper components such as copper and copper alloy fibers or particles are indispensable for friction materials used in disc brake pads, and are included in NAO friction materials. It is clear that the reduction of the copper component generated causes various problems that have not existed before, for example, the friction coefficient stability at high speed and high load, fade resistance, and wear resistance are reduced. It has become.
  • Patent Document 1 contains 0.5 to 50.0% by weight of metal tin or tin alloy with respect to the total amount of the friction material composition and 0.001 to 4.999% by weight of copper with respect to the total amount of the friction material composition.
  • a friction material formed by molding a friction material composition is described.
  • Patent Document 1 satisfies the above-mentioned regulations in that the content of the copper component is less than 5.0% by weight, but the stability of the friction coefficient at high speed and high load. It cannot be said that the required performance of fade resistance and wear resistance is sufficiently secured.
  • the present invention relates to a friction material obtained by molding a friction material composition of NAO material used for a disc brake pad, while satisfying the regulations concerning the content of copper components, and the stability of the friction coefficient at high speed and high load.
  • An object of the present invention is to provide a friction material capable of ensuring the required performance of fade resistance and wear resistance.
  • the inventors of the present invention have used a friction material obtained by molding a friction material composition of NAO material, which is used for a disc brake pad, with copper fibers and / or copper alloy fibers as metal fibers, and metal particles.
  • inorganic friction adjusting material As tin particles, binder, organic fiber, lubricant as metal sulfide lubricant, carbonaceous lubricant, titanate, and inorganic friction with Mohs hardness of 4.5 or more as inorganic friction modifier Adjusting material, inorganic friction adjusting material having a Mohs hardness of less than 4.5, organic friction adjusting material, and pH adjusting material are contained in specific amounts, and the total amount of copper components contained in the metal fiber is 5 with respect to the total amount of the friction material composition. It was found that the above problem can be solved by using a friction material composition of less than 0.0% by weight, and the present invention has been completed.
  • the present invention is a friction material obtained by molding a NAO material friction material composition used for a disc brake pad, and is based on the following technique.
  • the friction material composition may include copper fibers and / or copper alloy fibers as metal fibers with respect to the total amount of the friction material composition. 0.0 to 6.0 wt%, tin particles as metal particles in an amount of 1.0 to 5.0 wt% with respect to the total amount of the friction material composition, and binder as 5.0 to 10 wt% with respect to the total amount of the friction material composition. 0% by weight, 2.0 to 6.0% by weight of organic fiber with respect to the total amount of the friction material composition, and 0.5 to 7.0% of metal sulfide type lubricant as the lubricant with respect to the total amount of the friction material composition.
  • carbonaceous lubricant is 4.0 to 5.0 wt% with respect to the total friction material composition
  • titanate is 7.0 to 22.0 wt% with respect to the total friction material composition
  • inorganic As the friction modifier, an inorganic friction modifier having a Mohs hardness of 4.5 or more is 19.0-2 with respect to the total amount of the friction material composition.
  • Friction material characterized by being less than 5.0% by weight.
  • the friction coefficient at high speed and high load is satisfied while satisfying the regulations regarding the content of the copper component.
  • a friction material that can ensure stability, fade resistance, and wear resistance can be provided.
  • copper fibers and / or copper alloy fibers as metal fibers are 2.0 to 6. 0% by weight, tin particles as metal particles, 1.0 to 5.0% by weight with respect to the total amount of the friction material composition, binders 5.0 to 10.0% by weight with respect to the total amount of the friction material composition, organic
  • the fiber is 2.0 to 6.0% by weight with respect to the total amount of the friction material composition
  • the metal sulfide-based lubricant as the lubricant is 0.5 to 7.0% by weight with respect to the total amount of the friction material composition.
  • inorganic friction modifier having a hardness of 4.5 or more is 19.0 to 24.0 based on the total amount of the friction material composition.
  • pH adjusting material is contained 2.0-3.0 wt% with respect to the total amount of the friction material composition, and the total amount of the copper component contained in the metal fiber is based on the total amount of the friction material composition
  • a friction material composition that is less than 5.0% by weight is used.
  • the friction material formed from the NAO material friction material composition used in the disc brake pad satisfies high-speed and high-load while satisfying the laws and regulations concerning the copper content. It is possible to provide a friction material that can ensure the required performance of stability of friction coefficient, fade resistance, and wear resistance.
  • the metal fiber examples include copper fiber, copper alloy fiber such as bronze fiber, brass fiber, etc., and these are used alone or in combination of two or more, and the total amount of copper components contained in the metal fiber is friction. It is used so that it may become less than 5.0 weight% with respect to the whole material composition. Tin particles are used as the metal particles.
  • binder straight phenol resin, resin obtained by modifying phenol resin with various elastomers such as cashew oil, silicone oil, acrylic rubber, aralkyl modified phenol resin obtained by reacting phenols, aralkyl ethers and aldehydes
  • elastomers such as cashew oil, silicone oil, acrylic rubber
  • aralkyl modified phenol resin obtained by reacting phenols, aralkyl ethers and aldehydes
  • the binder generally used for friction materials such as thermosetting resins in which various elastomers, fluoropolymers and the like are dispersed in a phenol resin can be used, and these can be used alone or in combination of two or more. .
  • organic fibers examples include organic fibers that are commonly used in friction materials such as aramid fibers, cellulose fibers, poly-paraphenylenebenzobisoxazole fibers, and acrylic fibers. These may be used alone or in combination of two or more. Can be used.
  • metal sulfide lubricant molybdenum disulfide, zinc sulfide, tin sulfide, composite metal sulfide, etc., and as carbonaceous lubricant, it is usually used as friction material such as graphite, petroleum coke, activated carbon, oxidized polyacrylonitrile fiber pulverized powder, etc.
  • the lubricant used is mentioned, These can be used individually by 1 type or in combination of 2 or more types.
  • the titanate preferably has a plate-like shape or an irregular shape having a plurality of convex portions, and is usually used for friction materials such as potassium titanate, lithium potassium titanate, and magnesium potassium titanate.
  • a titanate is mentioned, These can be used individually by 1 type or in combination of 2 or more types.
  • Particulate inorganic such as iron trioxide, zeolite, calcium silicate hydrate, glass beads, magnesium oxide, zirconium oxide, zirconium silicate, alumina, silicon carbide, etc.
  • Examples include friction modifiers, wollastonite, sepiolite, basalt fibers, glass fibers, biosoluble artificial mineral fibers, and fibrous inorganic friction modifiers such as rock wool. These are used alone or in combination of two or more. They can be used in combination.
  • inorganic friction modifiers having a Mohs hardness of less than 4.5 include lubricants commonly used in friction materials such as particulate inorganic friction modifiers such as mica, vermiculite, talc, dolomite, kaolin, and calcium fluoride. These can be used individually by 1 type or in combination of 2 or more types.
  • iron trioxide is 2.0 to 7.0% by weight based on the total amount of the friction material composition
  • an inorganic friction modifier having a Mohs hardness of less than 4.5 If mica is added in an amount of 9.0 to 16.0% by weight based on the total amount of the friction material composition, the stability of the friction coefficient at high speed and high load is further improved, which is preferable.
  • Organic friction modifiers are usually used for friction materials such as cashew dust, crushed powder of tire tread rubber, vulcanized rubber powder such as nitrile rubber, acrylic rubber, silicone rubber, butyl rubber or unvulcanized rubber powder.
  • An adjusting material is mentioned, These can be used individually by 1 type or in combination of 2 or more types.
  • Calcium hydroxide can be used as a pH adjusting material.
  • a filler such as barium sulfate or calcium carbonate is used.
  • the friction material used in the disc brake of the present invention is separately mixed with the friction material raw material mixture obtained by mixing the friction material composition mixed in a predetermined amount uniformly using a mixer.
  • a mixer Surface treatment, heat-pressing molding process in which a back plate coated with an adhesive is stacked and placed in a thermoforming mold, and heated and pressed to mold, and the resulting molded product is heated to complete the curing reaction of the binder It is manufactured through a heat treatment step and a polishing step for forming a friction surface.
  • granulation step for granulating the friction material raw material mixture kneading step for kneading the friction material raw material mixture, granulation obtained in the friction material raw material mixture or granulation step
  • the pre-molding process in which the kneaded product obtained in the kneading process is put into a pre-molding mold and the pre-molded product is molded is performed. After the heat and pressure molding process, the painting / paint baking process and the scorch process are performed.
  • Friction material compositions having the compositions shown in Table 1 were mixed for 5 minutes with a Redige mixer, and pre-molded by pressing for 1 minute at 10 MPa in a molding die. This preform is placed on a steel back plate that has been washed, surface-treated, and coated with an adhesive, and molded in a thermoforming mold at a molding temperature of 150 ° C. and a molding pressure of 40 MPa for 10 minutes, and then 200 Heat treatment (post-curing) was carried out at 5 ° C.
  • the friction coefficient at high speed and high load is satisfied while satisfying the regulations regarding the content of the copper component.
  • a friction material that can ensure stability, fade resistance, and wear resistance can be obtained, and has extremely high practical value.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un matériau de frottement destiné à une plaquette de frein à disque, permettant, d'une part de garantir la stabilité du coefficient de frottement aux hautes vitesses et à forte charge, et d'autre part de garantir une bonne tenue à chaud ainsi qu'une bonne résistance à l'abrasion, tout en respectant les réglementations concernant la teneur en composants cuivrés. À cet effet, on a choisi une composition de matériau de frottement contenant 2% à 6% en poids de fibres de cuivre et/ou de fibres en alliage de cuivre, 1% à 5% en poids de particules d'étain, 5% à 10% en poids d'un liant, 2% à 6% en poids d'une fibre organique, 0,5% à 7% en poids d'un lubrifiant à base de sulfure de métal, 4% à 5% en poids d'un lubrifiant carboné, 7% à 22% en poids d'un titanate, 19% à 24% en poids d'une substance inorganique correctrice de coefficient de frottement présentant une dureté de Mohs d'au moins 4,5, 10% à 16% en poids d'une substance inorganique correctrice de coefficient de frottement présentant une dureté de Mohs inférieure à 4,5, 3% à 7% en poids d'une substance organique correctrice de coefficient de frottement, et 2% à 3% en poids d'un correcteur de pH, les composants cuivrés de la fibre de métal représentant moins de 5% du poids total de la composition du matériau de frottement.
PCT/JP2014/050133 2013-01-11 2014-01-08 Matériau de frottement WO2014109328A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2013-003265 2013-01-11
JP2013003265 2013-01-11
JP2013-268822 2013-12-26
JP2013268822A JP2014148666A (ja) 2013-01-11 2013-12-26 摩擦材

Publications (1)

Publication Number Publication Date
WO2014109328A1 true WO2014109328A1 (fr) 2014-07-17

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Application Number Title Priority Date Filing Date
PCT/JP2014/050133 WO2014109328A1 (fr) 2013-01-11 2014-01-08 Matériau de frottement

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JP (1) JP2014148666A (fr)
WO (1) WO2014109328A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016013078A1 (fr) * 2014-07-24 2016-01-28 日清紡ブレーキ株式会社 Matériau de frottement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6425333B2 (ja) * 2014-08-22 2018-11-21 日立オートモティブシステムズ株式会社 ブレーキ摩擦材
CN105154008A (zh) * 2015-10-20 2015-12-16 晋江凯燕化工有限公司 无铜成分传动制动用的摩擦材料及其制品
JP6301997B2 (ja) * 2016-04-19 2018-03-28 日清紡ブレーキ株式会社 摩擦材

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0532956A (ja) * 1991-07-26 1993-02-09 Aisin Chem Co Ltd 摩擦材
JP2002241737A (ja) * 2001-02-20 2002-08-28 Nisshinbo Ind Inc 非石綿系摩擦材
JP2010077341A (ja) * 2008-09-29 2010-04-08 Hitachi Automotive Systems Ltd ブレーキ摩擦材
JP2012255054A (ja) * 2011-06-07 2012-12-27 Hitachi Chemical Co Ltd ノンアスベスト摩擦材組成物

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0532956A (ja) * 1991-07-26 1993-02-09 Aisin Chem Co Ltd 摩擦材
JP2002241737A (ja) * 2001-02-20 2002-08-28 Nisshinbo Ind Inc 非石綿系摩擦材
JP2010077341A (ja) * 2008-09-29 2010-04-08 Hitachi Automotive Systems Ltd ブレーキ摩擦材
JP2012255054A (ja) * 2011-06-07 2012-12-27 Hitachi Chemical Co Ltd ノンアスベスト摩擦材組成物

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016013078A1 (fr) * 2014-07-24 2016-01-28 日清紡ブレーキ株式会社 Matériau de frottement
KR20170038798A (ko) * 2014-07-24 2017-04-07 닛신보 브레이크 가부시키가이샤 마찰재
KR102406253B1 (ko) * 2014-07-24 2022-06-10 닛신보 브레이크 가부시키가이샤 마찰재

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