CN103953668A - High friction composite brake shoe with cast iron insert - Google Patents
High friction composite brake shoe with cast iron insert Download PDFInfo
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- CN103953668A CN103953668A CN201410222851.0A CN201410222851A CN103953668A CN 103953668 A CN103953668 A CN 103953668A CN 201410222851 A CN201410222851 A CN 201410222851A CN 103953668 A CN103953668 A CN 103953668A
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- brake shoe
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Abstract
The invention discloses a high friction composite brake shoe with a cast iron insert. The composite brake shoe comprises polymer composite friction material, the cast iron insert and brake shoe steel backing, wherein the polymer composite friction material comprises the following main constituents in percent by mass: 5 to 9 percent of A-stage phenolic resin, 8 to 13 percent of nitrile rubber, 20 to 35 percent of steel fiber, 6 to 12 percent of magnesium oxide, 5 to 8 percent of petroleum coke, 20 to 35 percent of mineral fiber, 2 to 5 percent of crystalline flake graphite, 0.1 to 0.4 percent of hexamethylene tetramine, 0.1 to 0.5 percent of insoluble sulfur, 0.05 to 0.1 percent of NOBS, 1 to 3 percent of carbon black, and 1 to 1.5 percent of mullite; the hardness and the friction performance of the cast iron insert subjected to heat treatment are matched with that of the polymer composite friction material; cast iron is cast on small steel backing; then the small steel backing is welded with the brake shoe steel backing into a whole body. The composite brake shoe can obviously improve the heat-conducting property and reduce heat fade.
Description
Technical field
The present invention relates to railway traffic Brake Products technical field, relate in particular to a kind of high friction composite brake shoe with cast iron inserts.
Background technique
At present, urban track traffic is as an important component part of urban public tranlport system, its core technology is mostly offshore company's monopolization, the brake shoe that wherein urban rail transit vehicles is used is many dependence on import also, import brake shoe is not only expensive, and receipt period is long, occurred that problem can not solve in time.
External some the brand brake shoe simultaneously often using at present also exists the problems such as Wheel Tread Temperature is high, temperature rise variation acutely causes hot crack, peel off, and these problems have been accelerated the wearing and tearing of wheel, have improved the maintenance cost of vehicle.
Summary of the invention
The object of this invention is to provide a kind of high friction composite brake shoe with cast iron inserts, can significantly improve the heat-conducting property of composite brake shoe, effectively improve the heat fade of composite brake shoe, reduce wheel heat load, meet urban track traffic brake cabin apart from usage requirement short, that braking is frequent, retardation pressure is large.
With a high friction composite brake shoe for cast iron inserts, described composite brake shoe comprises macromolecule composite friction material, cast iron inserts and brake shoe steel backing, wherein:
The key component mass percent of described macromolecule composite friction material is: 5～9% resol; 8～13% nitrile butadiene rubber; 20～35% Steel Fibre; 6～12% magnesium oxide; 5～8% petroleum coke; 20～35% mineral fibre; 2～5% crystalline flake graphite; 0.1～0.4% hexamethylenetetramine; 0.1～0.5% insoluble sulfur; 0.05～0.1% NOBS; 1～3% carbon black; 1～1.5% mullite;
In described cast iron inserts, the mass percentage content of Main Ingredients and Appearance is: 1.5～3.0% carbon C; 1.2～2.7% silicon Si; 6.0～7.0% manganese Mn; ≤ 0.08 phosphorus P; ≤ 0.02% sulphur S; ≤ 0.09% magnesium Mg;
Described cast iron inserts after heat treatment hardness and frictional behaviour and described macromolecule composite friction material matches, and cast iron is cast on little steel backing, and described little steel backing is welded as a whole with described brake shoe steel backing again.
As seen from the above technical solution provided by the invention, can significantly improve the heat-conducting property of composite brake shoe, effectively improve the heat fade of composite brake shoe, reduce wheel heat load, meet urban track traffic brake cabin apart from usage requirement short, that braking is frequent, retardation pressure is large.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The high friction composite brake shoe structural representation with cast iron inserts that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the structural representation of the brake shoe steel backing of high friction composite brake shoe described in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment who obtains under creative work prerequisite, belong to protection scope of the present invention.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail, be illustrated in figure 1 the high friction composite brake shoe structural representation with cast iron inserts that the embodiment of the present invention provides, described composite brake shoe mainly comprises inserts liner plate 1, cast iron inserts 2, brake shoe steel backing 3 and macromolecule composite friction material 4, wherein:
The key component mass percent of described macromolecule composite friction material 4 is: 5～9% resol; 8～13% nitrile butadiene rubber; 20～35% Steel Fibre; 6～12% magnesium oxide; 5～8% petroleum coke; 20～35% mineral fibre; 2～5% crystalline flake graphite; 0.1～0.4% hexamethylenetetramine; 0.1～0.5% insoluble sulfur; 0.05～0.1% NOBS; 1～3% carbon black; 1～1.5% mullite.
In specific implementation, the promoter of selecting is the compound accelerant that tetramethylthiuram disulfide TMTD or tetramethylthiuram monosulfide TMTM proportionings different from N-(oxidation diethylidene)-2-[4-morpholinodithio sulfenamide form, and can guarantee that above-mentioned material has good technology capability in banburying process; And curing agent is specifically as follows hexamethylenetetramine.In above-mentioned formula, selecting resol is liquid resin, can guarantee that organic binder and powder or granular material fully infiltrate, and guarantees intensity and the performance homogeneous of friction material; Mixed fibre in formula can consist of according to a certain ratio Steel Fibre 10～25, mineral fibre 5～15.
This macromolecule composite friction material adopts engagement type preparation process, and concrete preparation process is:
First the key component of described macromolecule composite friction material is put in banbury by the mass percent of setting, through banburying heating 3～8 minutes, banburying, regulate 3～5 minutes, and temperature is controlled at 80～120 ℃, pressure and is controlled at 2～12Mpa in banburying process; Each component of sizing material after airtight engagement is mixing is uniformly dispersed, stable performance;
After banburying finishes, sizing material is discharged after two-stage crushing is processed and is obtained described macromolecule composite friction material.
In above-mentioned cast iron inserts 2, the mass percentage content of Main Ingredients and Appearance is: 1.5～3.0% carbon C; 1.2～2.7% silicon Si; 6.0～7.0% manganese Mn; ≤ 0.08 phosphorus P; ≤ 0.02% sulphur S; ≤ 0.09% magnesium Mg;
Described cast iron inserts 2 after heat treatment hardness and frictional behaviour and described macromolecule composite friction material 4 matches, and cast iron is cast on little steel backing, and described little steel backing is welded as a whole with described brake shoe steel backing 3 again.
In specific implementation, after above-mentioned cast iron inserts 2 is specifically put into sand mold by the inserts liner plate 1 preparing, matched moulds pours into molten iron, and obtains after depanning in addition; And described inserts liner plate 1 is welded on the intrados of described brake shoe steel backing 3, contribute to improve the adhesion strength that cast iron is inserted with brake shoe steel backing 3; The both sides of described brake shoe steel backing 3 are welded with stiffening rib, can effectively guarantee the adhesion strength of brake shoe friction piece and steel backing.
Further, described cast iron inserts 2 is designed to wedge shape, contributes to compacting material; The width of described cast iron inserts 2 is less than the width of described brake shoe steel backing 3, optimizes the layout that cast iron inserts at described brake shoe steel backing 3 simultaneously and makes it be distribution straggly, can guarantee cast iron insert with whole metal tread have contact and pressing process in the mobility of material.
Be illustrated in figure 2 the structural representation of the brake shoe steel backing of high friction composite brake shoe described in the embodiment of the present invention, in Fig. 2: adopt hatch frame in the middle of watt nose groove of described brake shoe steel backing 3, be conducive to brake shoe tread and wheel laminating, heat radiation while being conducive to brake, eliminating abrasive dust;
And the top of described watt of nose groove is arcuate structure, is conducive to brake shoe skewer and coordinates location with brake shoe; And be welded with steel plate in the both sides of described watt of nose groove, effectively increased rubbing contact area, brake shoe heat load while reducing braking.
Described in above-described embodiment, the preparation process of high friction composite brake shoe is: first the brake shoe steel backing with cast iron inserts and macromolecule composite friction material are pressurizeed to 140 tons on hydraulic press, pressurize aftershaping discharging in 120 seconds; Brake shoe through compacting is packed into and in box curing oven, carries out program mode and heat up and solidify, after solidifying, adopt machinery type processing brake shoe tread.
In sum, described in the embodiment of the present invention, with the high friction composite brake shoe of cast iron inserts, can significantly improve the heat-conducting property of brake shoe, reduce the heat fade of composite brake shoe, simultaneously in braking process, can effectively conduct the frictional heat that wheel tread and brake shoe friction piece produce in braking process, the fire damage of reduction to wheel, prevents that wheel heat crackle, heat crack, hot soarfing are from generation; Simultaneously can sweeper wheel tread in braking process and brake shoe between the foreign matter that is mingled with, effectively suppress the damascene phenomenon of composite brake shoe.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. with a high friction composite brake shoe for cast iron inserts, it is characterized in that, described composite brake shoe comprises macromolecule composite friction material, cast iron inserts and brake shoe steel backing, wherein:
The key component mass percent of described macromolecule composite friction material is: 5～9% resol; 8～13% nitrile butadiene rubber; 20～35% Steel Fibre; 6～12% magnesium oxide; 5～8% petroleum coke; 20～35% mineral fibre; 2～5% crystalline flake graphite; 0.1～0.4% hexamethylenetetramine; 0.1～0.5% insoluble sulfur; 0.05～0.1% NOBS; 1～3% carbon black; 1～1.5% mullite;
In described cast iron inserts, the mass percentage content of Main Ingredients and Appearance is: 1.5～3.0% carbon C; 1.2～2.7% silicon Si; 6.0～7.0% manganese Mn; ≤ 0.08 phosphorus P; ≤ 0.02% sulphur S; ≤ 0.09% magnesium Mg;
Described cast iron inserts after heat treatment hardness and frictional behaviour and described macromolecule composite friction material matches, and cast iron is cast on little steel backing, and described little steel backing is welded as a whole with described brake shoe steel backing again.
2. according to claim 1 with the high friction composite brake shoe of cast iron inserts, it is characterized in that,
After described cast iron inserts is specifically put into sand mold by the inserts liner plate preparing, matched moulds pours into molten iron, and obtains after depanning;
Described inserts liner plate is welded on the intrados of described brake shoe steel backing, and the both sides of described brake shoe steel backing are welded with stiffening rib.
3. according to claim 1 with the high friction composite brake shoe of cast iron inserts, it is characterized in that,
Described cast iron inserts is designed to wedge shape, and the width of described cast iron inserts is less than the width of described brake shoe steel backing, and the layout that simultaneously makes cast iron insert at described brake shoe steel backing is distribution straggly.
4. according to claim 1 with the high friction composite brake shoe of cast iron inserts, it is characterized in that,
In the middle of watt nose groove of described brake shoe steel backing, adopt hatch frame, and the top of described watt of nose groove is arcuate structure, and is welded with steel plate in the both sides of described watt of nose groove.
5. according to claim 1 with the high friction composite brake shoe of cast iron inserts, it is characterized in that, described macromolecule composite friction material adopts engagement type preparation process, specifically comprises:
The key component of described macromolecule composite friction material is put in banbury by the mass percent of setting, through banburying heating 3～8 minutes, banburying, regulated 3～5 minutes, and temperature is controlled at 80～120 ℃, pressure and is controlled at 2～12Mpa in banburying process;
After banburying finishes, sizing material is discharged after two-stage crushing is processed and is obtained described macromolecule composite friction material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410222851.0A CN103953668A (en) | 2014-05-23 | 2014-05-23 | High friction composite brake shoe with cast iron insert |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410222851.0A CN103953668A (en) | 2014-05-23 | 2014-05-23 | High friction composite brake shoe with cast iron insert |
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| CN103953668A true CN103953668A (en) | 2014-07-30 |
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| CN201410222851.0A Pending CN103953668A (en) | 2014-05-23 | 2014-05-23 | High friction composite brake shoe with cast iron insert |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU181199U1 (en) * | 2017-10-26 | 2018-07-05 | Открытое акционерное общество "Уральский завод авто-текстильных изделий" (ОАО "УралАТИ") | RAILWAY BRAKE PAD |
| WO2019083402A1 (en) * | 2017-10-26 | 2019-05-02 | Открытое Акционерное Общество "Уральский Завод Авто-Текстильных Изделий" | Brake shoe for a railway vehicle |
| CN110242687A (en) * | 2019-07-12 | 2019-09-17 | 北京天宜上佳高新材料股份有限公司 | A kind of steel back body and Composition brake shoes |
| US20220196096A1 (en) * | 2019-04-27 | 2022-06-23 | Nisshinbo Brake, Inc. | Underlayer composition for disc brake pad and disc brake pad using the underlayer composition |
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| CN101900176A (en) * | 2010-07-02 | 2010-12-01 | 北京瑞斯福科技有限公司 | Novel mosaic composition brake shoe and manufacturing method thereof |
| CN102261408A (en) * | 2010-05-24 | 2011-11-30 | 顾贵义 | Nanometer mullite automotive brake pad |
| JP2012189175A (en) * | 2011-03-11 | 2012-10-04 | Hokkaido Railway Co | Vehicle brake shoe and friction material |
| CN103267077A (en) * | 2013-05-28 | 2013-08-28 | 北京瑞斯福科技有限公司 | Inlay type composition brake shoe |
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Patent Citations (10)
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| CN1284461A (en) * | 1999-08-06 | 2001-02-21 | 西屋气刹车公司 | Brake-shoe with insert element combined with bottom plate |
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| CN101131189A (en) * | 2007-08-20 | 2008-02-27 | 谭美田 | Rubber multi-component composite brake shoe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU181199U1 (en) * | 2017-10-26 | 2018-07-05 | Открытое акционерное общество "Уральский завод авто-текстильных изделий" (ОАО "УралАТИ") | RAILWAY BRAKE PAD |
| WO2019083402A1 (en) * | 2017-10-26 | 2019-05-02 | Открытое Акционерное Общество "Уральский Завод Авто-Текстильных Изделий" | Brake shoe for a railway vehicle |
| US20220196096A1 (en) * | 2019-04-27 | 2022-06-23 | Nisshinbo Brake, Inc. | Underlayer composition for disc brake pad and disc brake pad using the underlayer composition |
| CN110242687A (en) * | 2019-07-12 | 2019-09-17 | 北京天宜上佳高新材料股份有限公司 | A kind of steel back body and Composition brake shoes |
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Application publication date: 20140730 |