CN101900176A - Novel mosaic composition brake shoe and manufacturing method thereof - Google Patents

Novel mosaic composition brake shoe and manufacturing method thereof Download PDF

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Publication number
CN101900176A
CN101900176A CN 201010225016 CN201010225016A CN101900176A CN 101900176 A CN101900176 A CN 101900176A CN 201010225016 CN201010225016 CN 201010225016 CN 201010225016 A CN201010225016 A CN 201010225016A CN 101900176 A CN101900176 A CN 101900176A
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China
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brake shoe
cast iron
novel
friction material
steel backing
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CN 201010225016
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CN101900176B (en
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邹怀森
张旭峰
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Beijing Railway Star Fortune High Tech Co ltd
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BEIJING QIUZHIYI DATA Co Ltd
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Abstract

The embodiment of the invention provides a novel mosaic composition brake shoe and a manufacturing method thereof. In the method, the novel composition brake shoe is formed by combining a high molecular composite friction material and cast iron inserts; and the method particularly comprises the following steps of: welding the cast iron inserts with hardness and friction coefficient matched with those of the high molecular composite friction material at the two ends of a steel back; pressing the high molecular composite friction material and the cast iron inserts into a whole by cold press molding to form a friction surface of the novel composition brake shoe; and curing the novel composition brake shoe formed by the cold press molding, and polishing the inner cambered surface of a friction body to obtain the novel composition brake shoe with the iron cast inserts. Thus the heat conductivity of the composition brake shoe can be obviously improved and the heat fade of the composition brake shoe can be reduced so as to ensure that the composition brake shoe has stable friction performance during the braking.

Description

A kind of novel mosaic composition brake shoe and preparation method thereof
Technical field
The present invention relates to train and use the brake shoe field, relate in particular to a kind of novel mosaic composition brake shoe and preparation method thereof.
Background technique
At present, railway is the important foundation facility of country, the main artery and the popular traffic tool of national economy, repeatedly speed raising along with railway, railway freight-car develops to the direction of high speed, heavy duty, under the situation that guarantees emergency stopping distance, increase, the raising of speed and the increase of trailing weight that axle is heavy are all had higher requirement to braking device and brake material.Wherein, brake shoe provides frictional force during as train braking, carries out the main parts size of transformation of energy, and requirement should have higher mechanical strength, good heat resistance and thermal conductivity, stable frictional behaviour, lower wearing and tearing and reduce abrasion and fire damage to wheel.
Employed brake shoe material is broadly divided into cast iron brake shoe, composite brake shoe and powder metallurgy brake block three classes in the prior art.Shortcomings such as but the cast iron brake shoe friction factor is low, Applicable scope is little, and braking force is big, and noise is big, and watt body is heavy, the big life-span of abrasion is short, incompatibility railway high speed, heavily loaded growth requirement.For overcome cast iron brake shoe intrinsic performance deficiency, a lot of countries have all begun the research work of composite brake shoe after the forties in last century, compare with cast iron brake shoe, composite brake shoe has that adjustable, the required braking force of friction factor is little, no-spark, quality little (only for cast iron brake shoe 1/3), little life-span of abrasion advantages such as long (are generally cast iron brake shoe 5~8 times).But the body material poor heat resistance of composite brake shoe in the prior art, the heat fade phenomenon is arranged, even more serious is that heat-conducting property is poor, will cause the Organizational Structure of wheel material to change like this, can make when serious wheel tread produce hot crack, heat crack, hot soarfing from etc. phenomenon, influenced the use of brake shoe.
Summary of the invention
The embodiment of the invention provides a kind of novel mosaic composition brake shoe and preparation method thereof, can significantly improve the heat-conducting property of composite brake shoe, reduces the heat fade of composite brake shoe, has stable frictional behaviour when guaranteeing the composite brake shoe braking; In braking process, can effectively conduct the frictional heat that wheel tread and brake shoe friction piece produce in braking process simultaneously, reduce fire damage, prevent that wheel heat crackle, heat crack, hot soarfing are from generation wheel.
The embodiment of the invention provides a kind of making method of novel mosaic composition brake shoe, and macromolecule composite friction material and cast iron are inserted to combine, and forms described novel composite brake shoe, specifically comprises:
The cast iron that hardness, frictional behaviour and described macromolecule composite friction material are complementary is inserted and is welded on the two ends of steel backing;
By cold moudling described macromolecule composite friction material and described cast iron being inserted is pressed into integral body, constitutes the rubbing surface of novel composite brake shoe;
Novel composite brake shoe to cold moudling is cured, and after the friction piece intrados carried out grinding process, obtains to have the described novel composite brake shoe that cast iron is inserted.
Described macromolecule composite friction material forms by the banburying granulation according to the each component of following weight ratio, and the each component of described weight ratio is:
5~7% resol, 8~12% nitrile butadiene rubbers, 15~25% Steel Fibres, 6~12% magnesium oxide, 5~8% petroleum cokes, 20~35% mineral fibre, 2~5% graphite, 0.1~0.4% hexamethylenetetramine, 0.1~0.5% sulphur, 0.05~0.1% tetramethylthiuram disulfide, 0.5~2% carbon black and 1~1.5% potassic feldspar.
The process of described banburying granulation specifically comprises:
In the each component input kneading type banbury with described weight ratio, by banburying heating 3~5 minutes, and cleaning, banburying were regulated 3~5 minutes; Wherein, in described banburying processing procedure, temperature is controlled at 80~120 ℃, pressure control at 5~7Mpa;
Get rid of mixture, and after breaking process, obtaining described macromolecule composite friction material.
Described cast iron is inserted and is divided by weight, and main component comprises:
1.5~3.0% carbon C; 1.2~2.7% silicon Si; 6.0~7.0% manganese Mn; ≤ 0.08 beryllium P; ≤ 0.02% sulphur S; ≤ 0.09% magnesium Mg.
The side that described cast iron is inserted has dovetail groove, and is wedge shape with described cast iron insert design;
The width that described cast iron is inserted is less than the width of described steel backing, and wherein an end aligns with steel backing, and the other end leaves the space of about 10mm, and described cast iron is inserted on described steel backing evenly distribute, and guarantees that described cast iron is inserted all to contact with whole metal tread.
The process of described cold moudling specifically comprises:
Pressurize on hydraulic press being welded with the steel backing that described cast iron inserts and the brake shoe mould of described macromolecule composite friction material, and pressurize more than 120 seconds with moulding.
Described solidification technical process specifically comprises:
The novel composite brake shoe of cold moudling is incubated 1 hour in 100 ℃ of baking ovens, be warming up to 170 ℃ of insulations 4 hours then, be warming up to 180 ℃ of insulations 15 hours again, and after insulation finishes, open described baking oven, keep blower normally to move, by below the air cooling to 80 ℃.
The embodiment of the invention also provides a kind of novel mosaic composition brake shoe, comprises that macromolecule composite friction material and cast iron inserts, wherein:
The cast iron that hardness, friction factor and described macromolecule composite friction material are complementary is inserted and is welded on the two ends of steel backing;
Described macromolecule composite friction material is inserted by cold moudling and described cast iron and is pressed into integral body, constitutes the rubbing surface of novel composite brake shoe;
Novel composite brake shoe to cold moudling is cured, and after the friction piece intrados carried out grinding process, obtains to have the described novel composite brake shoe that cast iron is inserted.
The side that described cast iron is inserted has dovetail groove, and described cast iron insert design wedgewise;
The width that described cast iron is inserted is less than the width of described steel backing, and wherein an end aligns with steel backing, and the other end leaves the space of about 10mm, and described cast iron is inserted on described steel backing evenly distribute, and guarantees that described cast iron is inserted all to contact with whole metal tread.
By the above-mentioned technological scheme that provides as can be seen, this method is inserted macromolecule composite friction material and cast iron and is combined, form described novel composite brake shoe, specifically comprise: the cast iron that hardness, friction factor and described macromolecule composite friction material are complementary is inserted and is welded on the two ends of steel backing; By cold moudling described macromolecule composite friction material and described cast iron being inserted is pressed into integral body, constitutes the rubbing surface of novel composite brake shoe; Novel composite brake shoe to cold moudling is cured, and after the friction piece intrados carried out grinding process, obtains to have the described novel composite brake shoe that cast iron is inserted.By the enforcement of technique scheme, just can significantly improve the heat-conducting property of composite brake shoe, reduce the heat fade of composite brake shoe, have stable frictional behaviour when guaranteeing the composite brake shoe braking; Simultaneously in braking process, can effectively conduct the frictional heat that wheel tread and brake shoe friction piece produce in braking process, reduction is to the fire damage of wheel, prevent wheel heat crackle, heat crack, hot soarfing from generation.
Description of drawings
Fig. 1 provides the schematic flow sheet of novel mosaic composition brake shoe making method for the embodiment of the invention;
Fig. 2 is cast iron that the embodiment of the invention the provides structural representation of side of inserting;
Fig. 3 inserts at the distribution schematic diagram of steel backing for cast iron that the embodiment of the invention provides;
Fig. 4 is the structural representation of novel mosaic composition brake shoe that the embodiment of the invention provides.
Embodiment
The embodiment of the invention provides a kind of novel mosaic composition brake shoe and preparation method thereof, at cast iron brake shoe and composite brake shoe pluses and minuses separately, with macromolecule composite friction material and cast iron effective combination of inserting, integrate cast iron brake shoe and composite brake shoe advantage separately, improved the combination property of high friction composite brake shoe.This novel composite brake shoe can significantly improve the heat-conducting property of brake shoe, reduces the heat fade of composite brake shoe, has guaranteed frictional behaviour stable when composite brake shoe is braked; Simultaneously in braking process, can effectively conduct the frictional heat that wheel tread and brake shoe friction piece produce in braking process, reduction is to the fire damage of wheel, prevent wheel heat crackle, heat crack, hot soarfing from generation.This novel composite brake shoe in braking process, the effective foreign matter that is mingled with between sweeper wheel tread and brake shoe, removing may produce the metal filings of damascene, effectively suppresses the damascene phenomenon of composite brake shoe.
For better describing the embodiment of the invention, now in conjunction with the accompanying drawings the specific embodiment of the present invention is described, be illustrated in figure 1 as the making method schematic flow sheet of novel mosaic composition brake shoe that the embodiment of the invention provides, described method comprises:
Step 11: the cast iron that hardness, friction factor and described macromolecule composite friction material are complementary is inserted and is welded on the two ends of steel backing.
In this step, at first the cast iron that hardness, frictional behaviour and macromolecule composite friction material are complementary is inserted and is welded on the two ends of steel backing, and described here being complementary refers to frictional behaviour and heat-conducting property is complementary.Wherein, this macromolecule composite friction material can form according to the each component of the following weight ratio technology mode by the banburying granulation, and the each component of described weight ratio includes:
5~7% resol, 8~12% nitrile butadiene rubber, 15~25% Steel Fibre, 6~12% magnesium oxide, 5~8% petroleum coke, 20~35% mineral fibre, 2~5% graphite, 0.1~0.4% hexamethylenetetramine, 0.1~0.5% sulphur, 0.05~0.1% tetramethylthiuram disulfide TMTD, 0.5~2% carbon black and 1~1.5% potassic feldspar.
The manufacturing process of above-mentioned banburying granulation specifically comprises:
In the each component input kneading type banbury with described weight ratio, by banburying heating 3~5 minutes, and cleaning, banburying were regulated 3~5 minutes; Wherein, in described banburying processing procedure, temperature is controlled at 80~120 ℃, pressure control at 5~7Mpa; Get rid of mixture, and after breaking process, obtaining described macromolecule composite friction material.
In addition, above-mentioned cast iron is inserted and is divided according to weight, and its main component comprises:
1.5~3.0% carbon C; 1.2~2.7% silicon Si; 6.0~7.0% manganese Mn; ≤ 0.08 beryllium P; ≤ 0.02% sulphur S; ≤ 0.09% magnesium Mg.
In the specific implementation process, the described cast iron side of inserting has dovetail groove, can increase macromolecule composite friction material and the cast iron cohesiveencess between inserting, the cast iron that being illustrated in figure 2 as the embodiment of the invention the provides structural representation of side of inserting: with the cast iron insert design is wedge shape, helps the compacting material; In order to guarantee the flowability of material in the pressing process, can design cast iron and insert width less than the steel backing width, an end aligns with steel backing, and another side leaves about 10mm space.
In addition, can also further optimize the layout that cast iron inserts at steel backing makes it be distribution straggly, the cast iron that being illustrated in figure 3 as the embodiment of the invention provides is inserted at the distribution schematic diagram of steel backing, Fig. 3 medium cast iron is inserted and is fixed under the brake shoe steel backing, just can guarantee by such distribution that cast iron is inserted and all contact with whole metal tread.
Step 12: by cold moudling macromolecule composite friction material and described cast iron being inserted is pressed into integral body, constitutes the rubbing surface of novel composite brake shoe.
In this step, the manufacturing process of cold moudling is specially: will be welded with the steel backing (as shown in Figure 3) that described cast iron inserts and the brake shoe mould of described macromolecule composite friction material and on hydraulic press, pressurize, and pressurize more than 120 seconds with moulding, discharging again.
Step 13: the novel composite brake shoe to cold moudling is cured, and after the friction piece intrados carried out grinding process, obtains to have the described novel composite brake shoe that cast iron is inserted.
In this step, solidification technical process is specially: the brake shoe of cold moudling is incubated 1 hour in 100 ℃ of baking ovens, be warming up to 170 ℃ of insulations 4 hours then, be warming up to 180 ℃ of insulations 15 hours again, and after finishing, insulation opens described baking oven, keep blower normally to move, after below the air cooling to 80 ℃, come out of the stove again.
By the novel composite brake shoe that technique scheme is made, can significantly improve the heat-conducting property of composite brake shoe, reduce the heat fade of composite brake shoe, have stable frictional behaviour when guaranteeing the composite brake shoe braking; In braking process, can effectively conduct the frictional heat that wheel tread and brake shoe friction piece produce in braking process simultaneously, reduce fire damage, prevent that wheel heat crackle, heat crack, hot soarfing are from generation wheel.
Simultaneously, the embodiment of the invention also provides a kind of novel composite brake shoe, is illustrated in figure 4 as the structural representation of novel composite brake shoe that present embodiment provides, described novel composite brake shoe comprises: steel backing 1, cast iron inserts 2, and macromolecule composite friction material 3, wherein:
The cast iron that hardness, frictional behaviour and described macromolecule composite friction material 3 are complementary 2 two ends that are welded on steel backing 1 of inserting;
Described macromolecule composite friction material 3 is inserted by cold moudling and described cast iron and 2 is pressed into integral body, constitutes the rubbing surface of novel composite brake shoe;
Novel composite brake shoe to cold moudling is cured, and after the friction piece intrados carried out grinding process, obtains to have the described novel composite brake shoe that cast iron is inserted.
In addition, insert 2 side of described cast iron has dovetail groove, and described cast iron is inserted and 2 is designed to wedge shape, concrete structure as shown in Figure 2;
Described cast iron is inserted 2 width less than the width of described steel backing, and wherein an end aligns with steel backing, and the other end leaves the space of about 10mm, and described cast iron is inserted 1 evenly distribute on described steel backing, guarantees that described cast iron is inserted 1 all to contact with whole metal tread.
In sum, the embodiment of the invention can significantly improve the heat-conducting property of composite brake shoe, reduces the heat fade of composite brake shoe, has stable frictional behaviour when guaranteeing the composite brake shoe braking; In braking process, can effectively conduct the frictional heat that wheel tread and brake shoe friction piece produce in braking process simultaneously, reduce fire damage, prevent that wheel heat crackle, heat crack, hot soarfing are from generation wheel.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within 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 (9)

1. the making method of a novel mosaic composition brake shoe is characterized in that, macromolecule composite friction material and cast iron are inserted to combine, and forms described novel composite brake shoe, specifically comprises:
The cast iron that hardness, frictional behaviour and described macromolecule composite friction material are complementary is inserted and is welded on the two ends of steel backing;
By cold moudling described macromolecule composite friction material and described cast iron being inserted is pressed into integral body, constitutes the rubbing surface of novel composite brake shoe;
Novel composite brake shoe to cold moudling is cured, and after the friction piece intrados carried out grinding process, obtains to have the described novel composite brake shoe that cast iron is inserted.
2. the method for claim 1 is characterized in that, described macromolecule composite friction material forms by the banburying granulation according to the each component of following weight ratio, and the each component of described weight ratio is:
5~7% resol, 8~12% nitrile butadiene rubbers, 15~25% Steel Fibres, 6~12% magnesium oxide, 5~8% petroleum cokes, 20~35% mineral fibre, 2~5% graphite, 0.1~0.4% hexamethylenetetramine, 0.1~0.5% sulphur, 0.05~0.1% tetramethylthiuram disulfide, 0.5~2% carbon black and 1~1.5% potassic feldspar.
3. method as claimed in claim 2 is characterized in that, the process of described banburying granulation specifically comprises:
In the each component input kneading type banbury with described weight ratio, by banburying heating 3~5 minutes, and cleaning, banburying were regulated 3~5 minutes; Wherein, in described banburying processing procedure, temperature is controlled at 80~120 ℃, pressure control at 5~7Mpa;
Get rid of mixture, and after breaking process, obtaining described macromolecule composite friction material.
4. the method for claim 1 is characterized in that, described cast iron is inserted and divided by weight, and main component comprises:
1.5~3.0% carbon C; 1.2~2.7% silicon Si; 6.0~7.0% manganese Mn; ≤ 0.08 beryllium P; ≤ 0.02% sulphur S; ≤ 0.09% magnesium Mg.
5. the method for claim 1 is characterized in that, the side that described cast iron is inserted has dovetail groove, and is wedge shape with described cast iron insert design;
The width that described cast iron is inserted is less than the width of described steel backing, and wherein an end aligns with steel backing, and the other end leaves the space of about 10mm, and described cast iron is inserted on described steel backing evenly distribute, and guarantees that described cast iron is inserted all to contact with whole metal tread.
6. the method for claim 1 is characterized in that, the process of described cold moudling specifically comprises:
Pressurize on hydraulic press being welded with the steel backing that described cast iron inserts and the brake shoe mould of described macromolecule composite friction material, and pressurize more than 120 seconds with moulding.
7. the method for claim 1 is characterized in that, described solidification technical process specifically comprises:
The novel composite brake shoe of cold moudling is incubated 1 hour in 100 ℃ of baking ovens, be warming up to 170 ℃ of insulations 4 hours then, be warming up to 180 ℃ of insulations 15 hours again, and after insulation finishes, open described baking oven, keep blower normally to move, by below the air cooling to 80 ℃.
8. a novel mosaic composition brake shoe is characterized in that, comprises that macromolecule composite friction material and cast iron inserts, wherein:
The cast iron that hardness, friction factor and described macromolecule composite friction material are complementary is inserted and is welded on the two ends of steel backing;
Described macromolecule composite friction material is inserted by cold moudling and described cast iron and is pressed into integral body, constitutes the rubbing surface of novel composite brake shoe;
Novel composite brake shoe to cold moudling is cured, and after the friction piece intrados carried out grinding process, obtains to have the described novel composite brake shoe that cast iron is inserted.
9. novel mosaic composition brake shoe as claimed in claim 1 is characterized in that,
The side that described cast iron is inserted has dovetail groove, and described cast iron insert design wedgewise;
The width that described cast iron is inserted is less than the width of described steel backing, and wherein an end aligns with steel backing, and the other end leaves the space of about 10mm, and described cast iron is inserted on described steel backing evenly distribute, and guarantees that described cast iron is inserted all to contact with whole metal tread.
CN2010102250164A 2010-07-02 2010-07-02 Novel mosaic composition brake shoe and manufacturing method thereof Expired - Fee Related CN101900176B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103267077A (en) * 2013-05-28 2013-08-28 北京瑞斯福科技有限公司 Inlay type composition brake shoe
CN103953668A (en) * 2014-05-23 2014-07-30 北京瑞斯福高新科技股份有限公司 High friction composite brake shoe with cast iron insert
CN104086841A (en) * 2014-06-17 2014-10-08 惠州市沃特新材料有限公司 Automobile brake disc, material for preparing same and preparation method for material
CN106763329A (en) * 2016-11-30 2017-05-31 北京天宜上佳新材料股份有限公司 The processing method of automobile brake sheet and automobile brake sheet
CN111677790A (en) * 2020-06-18 2020-09-18 沈阳远程摩擦密封材料有限公司 Power-concentrated motor car combined brake pad for 160KMh
CN113924427A (en) * 2019-06-11 2022-01-11 Rfpc控股公司 Friction device with reduced volume
WO2023227917A1 (en) * 2022-05-23 2023-11-30 Róna Tamás Kft Composite brake block

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1284461A (en) * 1999-08-06 2001-02-21 西屋气刹车公司 Brake-shoe with insert element combined with bottom plate
CN1286189A (en) * 1999-08-27 2001-03-07 西屋气刹车公司 Brake shoe capable of improving tread
DE102007044744A1 (en) * 2007-09-18 2009-04-09 Becorit Gmbh Brake pad for rail vehicles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1284461A (en) * 1999-08-06 2001-02-21 西屋气刹车公司 Brake-shoe with insert element combined with bottom plate
CN1286189A (en) * 1999-08-27 2001-03-07 西屋气刹车公司 Brake shoe capable of improving tread
DE102007044744A1 (en) * 2007-09-18 2009-04-09 Becorit Gmbh Brake pad for rail vehicles

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103267077A (en) * 2013-05-28 2013-08-28 北京瑞斯福科技有限公司 Inlay type composition brake shoe
CN103953668A (en) * 2014-05-23 2014-07-30 北京瑞斯福高新科技股份有限公司 High friction composite brake shoe with cast iron insert
CN104086841A (en) * 2014-06-17 2014-10-08 惠州市沃特新材料有限公司 Automobile brake disc, material for preparing same and preparation method for material
CN104086841B (en) * 2014-06-17 2016-08-24 惠州市沃特新材料有限公司 Automobile brake sheet, the material preparing automobile brake sheet and material preparation method
CN106763329A (en) * 2016-11-30 2017-05-31 北京天宜上佳新材料股份有限公司 The processing method of automobile brake sheet and automobile brake sheet
CN113924427A (en) * 2019-06-11 2022-01-11 Rfpc控股公司 Friction device with reduced volume
US12117055B2 (en) 2019-06-11 2024-10-15 Rfpc Holding Corp. Friction device with reduced volume
CN111677790A (en) * 2020-06-18 2020-09-18 沈阳远程摩擦密封材料有限公司 Power-concentrated motor car combined brake pad for 160KMh
WO2023227917A1 (en) * 2022-05-23 2023-11-30 Róna Tamás Kft Composite brake block

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