• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    FRICTIONAL MATERIAL on an organic basis, including phenolic resin, fibrous filler, metal-containing compound, organic modifier, friction modifier and inorganic modifier, characterized in that, in order to increase the coefficient of friction and wear resistance, it is asbestos, an asbestos layer, asbestos, asbestos, will asbestos, asbestos, asbestos, asbestos, asbestos, asbestos, and asbestos-resistant. mineral fibers, as the metal containing compound is -V .. /; NIN is a substance from the group: zinc, bronze, copper, iron, oxides of these metals and alumina or their mixture; as an organic modifier, a substance from the group: a powder of cashew seeds, rubber, natural latex, molasses, asphalt or a mixture of these, as an inorganic modifier - a substance from the group: barites, chalk, talc, tripoli, cryolite, wollastonite or their mixture, and as a friction modifier - particles of coal and / or graphite powder in the following ratio, wt.%: § 8-14 Phenolic resin Fibrous oO) 25-34 floor Metal rer axes od erzha4-22 present compound mo1-7 organic difikator mo18-34 difikator Friction modifier 4 Other inorganic 4i 00
    公开号:SU1114340A3
    申请号:SU792775405
    申请日:1979-06-01
    公开日:1984-09-15
    发明作者:В.Клейн Брюс；Дж.Джако Майкл
    申请人:Дзе Бендикс Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    11 The invention relates to friction materials on an organic basis, in particular, used as friction linings in brakes, UFTs and other analytical products. Compositions of organic friction materials used for lining couplings and brakes of vehicles must hold high working temperatures and dynamic loads. arising repeatedly. In order to avoid deterioration of performance and physical destruction under such conditions of operation, the cladding is intensified by asbestos fibers randomly dispersed in the resin matrix. The closest to the invention according to the technical essence and the achieved result is friction material} on an organic basis including, wt.%: Phenolic resin 12-20, fiberglass 30-60, modifier selected from the series: carbonate, calcium hydroxide, barium, aluminum 2-8, material with high glass conductivity (Fe, Cu, A1, Co) 5-20, elastomer 2-5, filler (barite, 3102) 5-15, friction modifier 5-15. However, such a friction material does not have a sufficiently high coefficient of friction and wear resistance. The aim of the invention is to increase the coefficient of friction and wear resistance of the friction material. The goal is achieved by TeMj that organic-based friction material, including phenolic resin, fibrous filler, metal-containing compound, organic modifier, friction modifier, and inorganic modifier as a fibrous filler contains asbestos or a mixture of glass and mineral fibers, as metal Containing compounds — a substance. From the group: zinc, bronze, copper, iron, oxides of these metals, and alumina, or their mixture, as. organic modifier - a substance from the group: powder of seeds of an ankardi rubber, natural latex, molasses, asphalt, or their mixture as an inorganic modifier - a substance from the group. Barites, chalk, talc, tripoli, crystal, wollastonite or their mixture and, as a friction modifier, particles or powder of coal and / or graphite in the following ratio, wt.%: Phenolic resin. Fibrous filler25-34 Metal-containing compound4-22 Organic modifier1-7 Frictional ionic modifier 18-34 Inorganic modifier Rest The constituent mixtures of material A (according to the prototype) and mixtures of materials AN in accordance with the invention were processed to obtain friction linings in the following way. Mixed asbestos fiber, zinc powder. Organic modifications: tori (two parts of powder of cashew seeds and one part of rubber debris), inorganic modifier (barite) and dry phenolic resin until a homogeneous mixture was obtained, which was placed in a mold and pressed into a briquette. After that, the ericket was transferred to a press and a sizzle at a pressure of about 350 kg / cm and the briquette temperature was raised to about 135 ° C. At this temperature, the phenolic resin spread over the mixture, and a matrix was obtained that covered the other components in a mixed state. The cake was then transferred to a curing oven having a temperature of about 260 ° C to further set the phenolic resin. The friction surface of the cured briquette is then sanded to a certain size corresponding to the size of the brake pad. This brake pad is mated to the vehicle's brake rotor assembly. Bracket-rotary unit is installed on the inertial dynamometer. Using an inertial dynamometer, performance and wear were tested depending on the temperature while paying attention to the change in friction with prolonged use, characteristic of monolithic rotary brakes and types of brakes that are used in 3 11 small cars. A brake with a diameter of 44 mm used on a 1977 Volkwagen Rabbit car, matted with disc pads using 23 cm, having an effective diameter of 9.60 cm. A tire with a rolling radius of 26.6 cm and a load on the wheel was used. 390 kg. Efficiency tests were performed before polishing (at speeds of 50, 80 and 110 km / h and negative accelerations of 3, 4, 5 and 6 m / s2 from the initial rotor temperature), 100 polishing brakes (64-0 ks / h with negative braking 4.5 m / s from. Initial rotor temperature 100 ° С) efficiency after polishing 50 stops at 200 ° С, 50 stops at 300 ° С, efficiency after 400 ° С, 50 stops at 500 ° С, efficiency after 500 ° C, 50 stops of refinishing at a temperature of 100 C, finite efficiency. Due to the good temperature characteristics of coal and / or graphite compared to organic friction modifiers, some of the asbestos contained in composition A was replaced by 23% by weight of coal, resulting in composition B (see table 1) In composition B, there are no organic modifiers of composition A and the content of metals (copper powder) and the percentage of barites are increased. Composition B was compiled and processed to obtain a brake shoe made of friction material ta. The same as with the composition A. Brake pads. from composition B was installed in the brake caliper, and was tested using an inertia dynamometer. The addition of carbon material is significant, 10 reduced the high-temperature wear of composition A in the temperature range of 300–500 ° C. The brake block made from composition B gives noise, and therefore composition B is modified by adding rubber debris, and the content of phenolic resin is reduced, resulting in composition C. Then composition C is processed to obtain a brake pad. inertial dynamometer brakes Although the coefficient of friction and wear rate for compounds B and C are improved compared to composition A, the asbestos contained in them pollutes production. Compounds B and C must be modified by replacement with asbestos c-glazed and mineral fiber. All tested compounds were made of fiberglass (E - glass), and mineral fiber with the following characteristics. Fiberglass contained, wt%: silica aluminum oxide 15.5 j calcium oxide 17; magnesium oxide 4.5; boron oxide 3.5 and sodium oxide 1.0. The fiber diameter can range from 25010000 microns. The fiber surface was treated with a silanizing reagent to improve the adhesion of the resin to the fiber. Mineral fiber contained, wt.%: Silica 42,0; alumina 8.0; calcium oxide 35.0; magnesium oxide 8.0 and other oxides 7.0. The fiber diameter can range from 1-15 microns, and the fiber length can be 40-100 microns. The surface of the fiber was treated with silanizing reagent to improve the adhesion of the resin to the fiber. Composition B was modified by replacing the asbestos contained in it with an equal volume percentage of glass fiber and mineral fiber, which resulted in composition D, from which the brake shoe was machined and tested on an inertial dynamometer. Composition D worked better in the high-temperature working range above 200 ° C than the initial composition A with asbestos, while the wear rate was the same as for composition B with asbestos. Composition C was modified similarly, by replacing the asbestos contained in it, by an equal amount of fiberglass and mineral fiber in volume percent. From part E, by mechanical processing, a brake pad was manufactured, which was tested on an inertial dynamometer. A study of the rotor used in tests of compositions D and E showed that the destruction and tearing of the rotor, common in all known compositions containing glass fiber, was absent. Since composition E had a lower overall wear rate than composition D, it was chosen as 5. .. 1 starting material for modification in order to establish different limits for the high-carbon family of asbestos-free materials Due to the availability and cheapness of iron particles or copper powder particles in the mixture E were replaced by an iron powder, obtaining composition F, from which a brake pad was made by mechanical processing and tested on an inertial dynamometer. The same particles in composition F stabilized the coefficient of friction over the entire proposed working range of friction material, however, the wear rate does not correspond to the speed of composition E at a temperature of over 400 ° C despite the fact that the wear rate is significantly reduced compared to material with asbestos in working the range of 300-400 ° C. Under certain conditions, friction materials containing a large amount of metal particles or powder, such as iron and copper, in compounds D, E and F create noise during use of the brakes. Since graphite and / or coal have the ability to absorb noise, they experienced the effect of changing the content of coal and / or graphite in compounds E and F in order to reduce the noise created during the use of brakes. In this connection, the amount of coal particles in composition F was increased, the number of barites decreased, with the result that composition G was obtained, from which the brake pads were obtained by mechanical treatment, which were tested on an inertia dynamometer. Composition G increased friction at 200 ° C with a slight decrease in friction at 500 ° C. The speed and nose of composition G is almost the same as in composition F. In order to develop a friction material for large loads, having maximum resistance to wear, as shown by composition E at 500 ° C, then compositions containing particles of copper or copper-based were obtained and not iron particles. Composition H was obtained from composition E by replacing coal particles in mixture E with equal quantities of natural or synthetic graphite. .The brake pads obtained by means of machining were tested using an inertial dynamometer. The coefficient of friction of the composition of N almost coincides with the coefficient (1) of the friction of composition E, and the wear rate is slightly reduced, but acceptable for brake pads of most vehicles. Dp reduce the rate of wear of the composition; All particles or powder of coal and / or graphite contained in it were produced exclusively from large particles of synthetic graphite to obtain composition 0. Brake pads were obtained from composition E by mechanical treatment, which were tested on an inertia dynamometer. As can be seen from a comparison of the characteristics of formulations E and 3, the coefficient of friction and the rate of wear of the composition are equivalent to composition E. However, the noise caused by pads containing metal can be reduced to a permissible level by adding particles or graphite. To assess the effect of metal powder or particles on the original family of friction materials with high carbon content and not containing asbestos composition E, Composition J was created, in which there was no metallic powder or particles, and the content of barites was increased to 18 wt.% Of the total composition. Composition J was obtained by machining brake pads, which were tested on an inertial dynamometer. The coefficient of friction of the composition J is similar to asbestos-free composition E, and the wear rate at 500 ° C is worse than the wear rate of compositions E and A. Thus, composition 3 does not withstand large loads. In order to increase the friction coefficient of composition E, a part of coal and / or graphite in it was replaced with powder of cashew seed for creeping composition K, from which brake pads were made by mechanical processing and tested on an inertial dynamometer. The coefficient of friction soya-, tava K is improved compared with composition A and is the same as that of composition E, however, the wear rate of composition K is improved only in comparison with composition A,
    7f
    To determine the optimum percentage of particles of coal and / or graphite powder in composition E, barites were excluded and the content of coal particles was accordingly increased, resulting in composition L. The composition of U was obtained by machining brake pads, which were tested on an inertia dynamometer. The rate of wear of the composition L is equivalent to the rate of wear of the composition E at temperatures up to 400 C.
    Since the wear rate at a high temperature of composition E is practically stable in the range of 200AOO ° C, composition E can be modified by reducing the mineral fiber content with a further increase in the content of carbon particles and maintaining the content in volume percent of the remaining components in a constant j, resulting in a composition M Of the composition M, a disk-brake pad was obtained by mechanical processing, which was tested on an inertial dynamometer. The coefficient of friction of the composition M is higher than the coefficient of friction of the initial composition E in the entire temperature range, and the wear rate in. temperature range YuO-AOO C
    43DO8- I
    practically equivalent to the rate of wear of the composition L Since the pieces or particles of copper alloys are more accessible and cheaper than particles of copper or copper oxides, the composition of E used particles of a copper alloy, resulting in the composition N. The composition of N was composed of N, that have been tested on an inertial dynamometer; The coefficient of friction of this composition is almost identical to the coefficient of friction of composition E, and the rate of wear is worse over the entire temperature range. . , -.
    The compositions of compositions A-1 for frikdaonny material in accordance with the invention are given in table. one.
    The maximum wear values of the described friction material. in comparison with the maximum wear of the friction material of the prototype (composition A) are given in table. 2.
    The values of the coefficient of friction of the detached friction material in comparison with the coefficient of friction of the known material (composition A) are given in Table. 3
    As can be seen from the table. 2 and 3, the friction material according to the invention has increased friction coefficient and wear resistance.
    14 15 15 16 Glass fiber Mineral water14 15 16 16 glass Metallic particles or 5 21 22 19 20 +17 17 powder; Organic 20 About 40,443 Modifiers
    T a b l and yes 1 15 15 16 15 15 15 15. 15 15 15 15 15 15 15 18 18 4 20 21 19 22 4 447443 Components. A Inorganic modifiers12 Particles or powder of coal and / or graphite. O Phenol Resin 13 EXAMPLE. Temperature, ZII 100 O., 1270 2000.7620 3001.1470 4001.4224 500-1.7780 1000.3540. Temperature, n 100 0.2032 0.1524 0.1524 .0.1524 200 0.0508 0.0762 0.0762 0.1016
    1114340.
    10 Continuation of the table .: Composition of the friction material BC D E FG H IJ K L M N 17 17 16 14 15 8 18 18.24 17 7 15 8 23 24 23 24 25 31 22 22 26 18 18 24 34 14 8 14 8 89 8 8 9888 8 e: In the compositions of BF and HN at least 7% of barites, in the composition of H equal amounts of synthetic and natural graphite; consisting of K at least 4% cashew seed powder; composed of J alumina. Maximum wear, mm, composition II jIIIIEIIIIIiril 0.2540 0.1270 0.1016 0.1778 0.1270 0.1524 0.2794. -,, 02540 0762 0.02540.07620.02540.07620.07762 0.20320.1016 0.05080.17780.05080.12700.1016 0.500800.1016 0.07620.22860 12700.17780.1270 0.93980 , 1270 0.17780.25400.25400.76200.7112 0.25400.12270, 0.15240.10160.07620.44020.2286 - in., Maximum wear, mm, composition - GT T 1 - t-- - IJ to L M N Table 2 Continuation of table.2 0.1270 0.2286 0.2032 0.0762 0.0762 0.0762
    3000,15240,10160,12700,17780,1270
    4000,25400,17780,15240,22860,1778
    5000,30480,22860,939.80,48260,6350
    1000,15240,10160,15240,12700,2032
    0.36
    0.35 0.52 0.24 0.15 0.46 0.26 0.37 0.46 0.32 0.35 0.34
    0.12700.1524
    0.15240.0762
    0.53340.9144
    0,22860,3048
    Table3
    0.31
    0.32
    0.33
    , 35
    0.38
    0.45 0.45 0.40 0.51
    0.50 0.51, 51 0.40 0.45 0.40
    0.41 0.38, 42
    0.32 0.35 0.36 0.38 0.34, 32 0.28 0.30 0.30 0.27
    0.28, 29 0.34
    0.20 0.27 0.23 0.29, 28
    Continued table. 3
    权利要求:
    Claims (1)
    [1]
    Organic based friction material, including phenolic resin, fibrous filler, metal-containing compound, organic modifier, friction modifier and inorganic modifier, characterized in that, in order to increase the friction coefficient and wear resistance, it contains asbestos or a mixture of glass and mineral fibers, as a metal-containing compound - a substance from the group: zinc, bronze, copper, iron, oxides of these metals and aluminum oxide or a mixture thereof, as f of an organic modifier - a substance from the group: cashew seed powder, rubber, natural latex, molasses, asphalt or a mixture thereof; as an inorganic modifier - a substance from the group: barite, chalk, talc, tripoli, cryolite, wollastonite or a mixture thereof and as friction modifier - particles or powder of coal and / or graphite in the following ratio of components, wt.%:
    Phenolic resin Fibrous filler Metal-containing compound Organic modifier Friction modifier Inorganic modifier
    8-14
    25-34
    4-22
    1-7
    18-34
    The rest <o t—
    1114340 A mixture and as a friction modifier - particles or powder of coal and / or graphite in the following ratio of components, wt.%:
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    同族专利:
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    法律状态:
    优先权:
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    US05/911,848|US4175070A|1978-06-02|1978-06-02|High carbon friction material|
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