CN111942330B - Shape-correcting grinder and manufacturing method thereof - Google Patents

Shape-correcting grinder and manufacturing method thereof Download PDF

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Publication number
CN111942330B
CN111942330B CN201910411114.8A CN201910411114A CN111942330B CN 111942330 B CN111942330 B CN 111942330B CN 201910411114 A CN201910411114 A CN 201910411114A CN 111942330 B CN111942330 B CN 111942330B
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shape
grinder
modifying
filler
zircon
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CN111942330A (en
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苟青炳
汪冬冬
伍安旭
吴波
徐昊
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CRRC Qishuyan Institute Co Ltd
CRRC Changzhou Tech Mark Industrial Co Ltd
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CRRC Qishuyan Institute Co Ltd
CRRC Changzhou Tech Mark Industrial Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/62—Other vehicle fittings for cleaning
    • B60S1/66—Other vehicle fittings for cleaning for cleaning vehicle exterior
    • B60S1/68—Other vehicle fittings for cleaning for cleaning vehicle exterior for freeing wheels or tyres from foreign matter, e.g. wheel scrapers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
    • C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • C08L61/14—Modified phenol-aldehyde condensates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/16—Halogen-containing compounds
    • C08K2003/162—Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

The invention relates to the field of friction materials, and discloses a shape-correcting grinder and a manufacturing method thereof. The shape-modifying grinder comprises: 30-45% of binder, 4-10% of tire powder, 20-25% of friction-increasing filler, 10-25% of shape-modifying filler, 14-20% of reinforcing material and 1-5% of polytetrafluoroethylene powder. Wherein the binder comprises modified phenolic resin, and the shape-modifying filler comprises tungsten carbide and zircon. By adding the shape modification filler, the component proportion of each component of the grinding mill is adjusted, the shape modification performance of the grinding mill is improved, the polygon emergence of the high-speed motor train unit is inhibited, and the turning mileage of the wheel is prolonged. Compared with the existing grinder, the shape correction grinder manufactured by the method provided by the embodiment of the invention has the advantages that the service life is prolonged, the weight of the grinder is reduced, and the shape correction speed of the grinder to the polygonal wheel is improved by 10-30%.

Description

Shape-correcting grinder and manufacturing method thereof
Technical Field
The invention relates to the field of friction materials, in particular to a shape-modifying grinder and a manufacturing method thereof.
Background
Along with the continuous development of high-speed trains, the running lines are continuously increased, the road conditions of the lines are complicated and changeable, and polygonal abrasion can occur in the circumferential direction of wheels of the high-speed trains after the high-speed trains operate for a certain mileage. The polygon of the wheel can intensify the dynamic action of the wheel rail, generate high-frequency wheel rail impact vibration, cause the reduction of the riding comfort of passengers, and even damage the rail and vehicle parts seriously. The problem of polygonal wheels of high-speed trains has attracted more and more attention from railway departments and scientific research institutes.
The current vehicle tracking for many years shows that the frequency of the wheel polygon of the high-speed train provided with the tread sweeping device is low, the condition of the wheel polygon is greatly improved, and the grinding element in the tread sweeper has the function of inhibiting the wheel polygon. In order to further improve the inhibition effect of the grinder on the polygon of the wheel, manufacturers at home and abroad gradually develop a shape-modifying grinder with a shape-modifying effect. However, the shape correction grinders applied to the high-speed motor train unit generally have the problems of over-quick abrasion, metal inlaying, hot cracks on friction surfaces and the like, and the service life and the shape correction effect of the grinders are greatly shortened.
Disclosure of Invention
One of the objectives of the present invention is to provide a dressing grinder, which has a better dressing effect and a longer service life.
The invention also provides a method for manufacturing the above-mentioned shape-modifying grinder.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
In a first aspect, an embodiment of the present invention provides a shape-modifying grinder, which includes, by weight:
30-45% of binder, 4-10% of tire powder, 20-25% of friction-increasing filler, 10-25% of shape-modifying filler, 14-20% of reinforcing material and 1-5% of polytetrafluoroethylene powder;
wherein the binder comprises modified phenolic resin, and the shape-modifying filler comprises tungsten carbide and zircon.
In one embodiment of the invention, the zircon is present in an amount of 15% to 20% by weight of the total weight of the dressing mill.
In one embodiment of the invention, the weight ratio of the zircon to the tungsten carbide is (1-4): 1.
In one embodiment of the invention, the binder comprises at least one of a boron-modified phenolic resin, a molybdenum-modified phenolic resin, a cashew nut shell oil-modified phenolic resin.
In one embodiment of the invention, the reinforcing material comprises at least one of expanded vermiculite, polyvinyl alcohol fibers, hemp fibers.
In one embodiment of the present invention, the zircon has a particle size of 150 to 300 mesh and the tungsten carbide has a particle size of less than 800 mesh.
In one embodiment of the invention, the friction enhancing filler comprises at least one of cryolite, fluorite, and limestone.
In a second aspect, an embodiment of the present invention further provides a method for manufacturing a shape-modifying grinder, including:
mixing 30-45% of binder, 4-10% of tire powder, 20-25% of friction-increasing filler, 10-25% of shape-modifying filler, 14-20% of reinforcing material and 1-5% of polytetrafluoroethylene powder according to weight percentage to obtain a mixture, wherein the binder comprises modified phenolic resin, and the shape-modifying filler comprises tungsten carbide and zirconite;
loading the mixture into a die and performing hot press molding;
and curing the shape-correcting grinder after hot-press molding.
In one embodiment of the present invention, the zircon has a particle size of 150 to 300 mesh and the tungsten carbide has a particle size of less than 800 mesh.
In one embodiment of the invention, in the step of hot press forming, the hot press temperature is 100-150 ℃; and curing the shape-modifying grinder after hot press molding at 130-170 ℃.
The shape-modifying grinder and the manufacturing method thereof have the beneficial effects that:
the shape-modifying grinder of the embodiment of the invention comprises: 30-45% of binder, 4-10% of tire powder, 20-25% of friction-increasing filler, 10-25% of shape-modifying filler, 14-20% of reinforcing material and 1-5% of polytetrafluoroethylene powder. Wherein the binder comprises modified phenolic resin, and the shape-modifying filler comprises tungsten carbide and zircon. By adding the shape modification filler, the component proportion of each component of the grinding mill is adjusted, the shape modification performance of the grinding mill is improved, the polygon emergence of the high-speed motor train unit is inhibited, and the turning mileage of the wheel is prolonged. The shape modifying filler used in the invention comprises zircon and tungsten carbide. The zircon is high in hardness and has glass-like properties, the friction coefficient can be improved under the normal friction working condition, viscoelasticity is increased or the zircon is converted into viscous flow state under the high-temperature friction condition, the wheel can be well ground by the aid of the zircon due to the characteristics, the hardness of the zircon is reduced along with the temperature of the friction surface, and the increase of the abrasion of the wheel tread is avoided. In addition, the tungsten carbide powder added into the grinder can improve the grinding efficiency of the grinder to the initial polygon of the wheel. The density of the shape-modifying grinding mill prepared by the method provided by the embodiment of the invention can reach 1.5-1.9 g-cm-3Hardness (HRR) of 115-123, compression strength of 170-230 MPa, and impact strength of 4.9-6.7 KJ/m2Compared with the existing grinder, the service life of the grinder is prolonged, the weight of the grinder is reduced, and the dressing speed of the grinder to the polygonal wheel is improved by 10-30%.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The shape-modifying abrasive and the method for making the same according to the embodiments of the present invention will be described in detail below.
The shape-modifying grinder provided by the embodiment of the invention can be used for modifying the shape of wheels of a high-speed motor train unit or a high-speed rail, and comprises the following components in percentage by weight: 30-45% of binder, 4-10% of tire powder, 20-25% of friction-increasing filler, 10-25% of shape-modifying filler, 14-20% of reinforcing material and 1-5% of polytetrafluoroethylene powder.
Wherein the binder comprises modified phenolic resin, and the shape-modifying filler comprises tungsten carbide and zircon. The resin mainly plays a role of a bonding material in the grinding stone, the higher the resin content is, the smaller the grinding stone density is, the higher the impact strength and the compression strength of the grinding stone are, and the better the wear resistance is. The invention selects the phenolic resin with high temperature resistance and wear resistance, thereby further prolonging the service life of the grinder. Further, the binder comprises one or a mixture of more of boron modified phenolic resin, molybdenum modified phenolic resin and cashew nut shell oil modified phenolic resin.
In the shape-modifying filler, the zircon not only has high hardness, but also has glass-like property, the friction coefficient can be improved under the normal friction working condition, the viscoelasticity is increased or the zircon is converted into viscous flow state under the high-temperature friction condition, the characteristic of the zircon enables a grinding wheel to be well ground at the initial stage of the contact of the grinding wheel, the hardness of the zircon is reduced along with the temperature of the friction surface, and the increase of the abrasion of the wheel tread is avoided. In addition, a small amount of ultrafine tungsten carbide powder is added into the grinder, so that the grinding efficiency of the grinder on the initial polygon of the wheel can be improved. Further, the content of the zircon accounts for 5% -20% of the total weight of the shaping grinding mill, and the weight ratio of the zircon to the tungsten carbide is (1-4): 1.
in one embodiment of the invention, the reinforcing material comprises at least one of expanded vermiculite, polyvinyl alcohol fibers, hemp fibers. Expanded vermiculite, polyvinyl alcohol fiber and fibrilia are used as a grinding particle reinforcing material, wherein the expanded vermiculite has the characteristics of heat resistance, wear resistance and sound absorption, the polyvinyl alcohol fiber has the characteristics of high strength and high modulus dispersibility, and the fibrilia is used as a natural plant fiber, is green and environment-friendly, and is convenient to obtain materials. Optionally, the fibrilia used in the embodiment of the invention is ramie, and the shape-modifying grinder provided by the embodiment of the invention has an excellent mechanical effect by adjusting the proportion of the three components in the reinforcing material.
In an alternative embodiment, limestone, fluorite, cryolite are used as friction-increasing fillers, and polytetrafluoroethylene powder, tire powder are used as friction-reducing fillers.
The embodiment of the invention also provides a manufacturing method of the shape-modifying grinder, which is used for manufacturing the grinder, and the manufacturing method comprises the following steps:
first, mixing material
Mixing 30-45% of binder, 4-10% of tire powder, 20-25% of friction-increasing filler, 10-25% of shape-modifying filler, 14-20% of reinforcing material and 1-5% of polytetrafluoroethylene powder according to weight percentage to obtain a mixture, wherein the binder comprises modified phenolic resin, and the shape-modifying filler comprises tungsten carbide and zirconite. Optionally, the granularity of the zircon is 150-300 meshes, and the granularity of the tungsten carbide is smaller than 800 meshes; the granularity of the tire powder is 80-100 meshes, and the granularity of the polytetrafluoroethylene powder is 250 meshes; the particle size of limestone is 200 mesh, and the particle size of cryolite and fluorite is 100 mesh. In addition, 2 to 3 weight percent of petroleum coke can be optionally added.
Second, agglomeration
Heating and pressing the mixture into sheets, and crushing the sheets into fragments after cooling. Further, the mixture can be pressed into thin slices of about 1-2mm on a hot roller machine, the prepressing temperature is 115-120 ℃, after the thin slices are cooled, the thin slices are crushed in a crusher to be placed into a hot pressing die for secondary pressing.
Third, hot pressing
And (3) putting the fragments into a die, starting a hot press, controlling the hot pressing temperature to be 100-150 ℃, and pressurizing for 10-40 min. In some alternative embodiments, the mixture may not be pressed into tablets before being crushed into blocks, and the mixture may be directly added to a mold for hot pressing.
Fourthly, curing
And taking the obtained millets out of the die after hot pressing, and putting the millets into a curing furnace for secondary curing. Optionally, curing for 4-8 h at 130-170 ℃ to obtain a finished product of the shape-modified grinding particles.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The embodiment provides a shape-correcting grinder and a manufacturing method thereof. The shape-modifying abrasive of the present example comprises, by weight: 35% of binder, 4% of tire powder, 20% of friction-increasing filler, 25% of shape-modifying filler, 15% of reinforcing material and 1% of polytetrafluoroethylene powder.
The binder in this example is boron modified phenolic resin, and the tire powder particle size is 80 mesh. The friction-increasing filler is a mixture of limestone and cryolite powder. Wherein the limestone and cryolite are present in an amount of 15% and 5% respectively, based on the total weight of the millbase material. The shape-modifying filler is a mixture of two powders, namely zircon powder and tungsten carbide, wherein the content of the zircon powder and the tungsten carbide powder is respectively 20% and 5% of the total weight of the grinding material. The reinforcing material of this example was a mixture of exfoliated vermiculite and hemp fibers, wherein exfoliated vermiculite was 5% and hemp fibers was 10% of the total weight of the modified grinders.
The method for manufacturing the shape-modifying grinder of the embodiment comprises the following steps:
s1, pouring 35% of the binder, 4% of the tire powder, 20% of the friction-increasing filler, 25% of the shape-modifying filler, 15% of the reinforcing material and 1% of the polytetrafluoroethylene powder into a mixer according to the weight percentage, and mixing for 15 min.
S2, pressing the mixture obtained after the mixing in the step S1 on a hot roller into slices of about 1-2mm, pre-pressing at 120 ℃, and crushing the slices into fragments in a crusher after the slices are cooled.
S3, filling the fragments obtained in the step S2 into a die, starting a hot press, controlling the hot pressing temperature at 100 ℃, and pressurizing for 10min under the pressure of 4 MPa.
And S4, taking the grinding mill obtained after hot pressing in the step S3 out of the die, putting the grinding mill into a curing furnace for curing, and curing for 4 hours at 160 ℃ to obtain a finished product of the shape-modified grinding mill.
The performance of the abrasives obtained in this example was tested, and the test methods and results are as follows.
The test was carried out in accordance with the test method TB/T3196--3Hardness (HRR)115, coefficient of friction 0.5, compressive strength 171MPa, compressive modulus 3.1GPa, impact strength 4.9KJ/m2. Grinding mill 1: 1 bench modification test, wheel speed 250km/h, the grinder continuously grinds, for a 20-step polygonal wheel, the time required for the wheel to descend by 20dB is 3h, the efficiency is improved by 30% compared with the existing grinder, and the abrasion thickness of the grinder is reduced by 5%.
Example 2
The embodiment provides a shape-correcting grinder and a manufacturing method thereof. The shape-modifying abrasive of the present example comprises, by weight: 45% of binder, 5% of tire powder, 20% of friction-increasing filler, 15% of shape-modifying filler, 14% of reinforcing material and 1% of polytetrafluoroethylene powder.
The binder in this example is molybdenum modified phenolic resin, and the tire powder particle size is 90 mesh. The friction-increasing filler is a mixture of cryolite and fluorite powder. Wherein the cryolite and fluorite are present in an amount of 10% by weight of the total weight of the mill base material. The shape-modifying filler is a mixture of zircon powder and tungsten carbide powder, wherein the content of the zircon powder and the content of the tungsten carbide powder are respectively 10% and 5% of the total weight of the shape-modifying grinding sub-material. The reinforcing material of this example is a mixture of exfoliated vermiculite and polyvinyl alcohol fibers, wherein exfoliated vermiculite comprises 10% of the total weight of the modified grinding pebbles and polyvinyl alcohol fibers comprises 4% of the total weight of the modified grinding pebbles.
The method for manufacturing the shape-modifying grinder of the embodiment comprises the following steps:
s1, pouring 45% of the binder, 5% of the tire powder, 20% of the friction-increasing filler, 15% of the shape-modifying filler, 14% of the reinforcing material and 1% of the polytetrafluoroethylene powder into a mixer according to the weight percentage, and mixing for 10 min.
S2, pressing the mixture obtained after the mixing in the step S1 on a hot roller into slices of about 1-2mm, pre-pressing at 115 ℃, and crushing the slices into fragments in a crusher after the slices are cooled.
S3, filling the fragments obtained in the step S2 into a die, starting a hot press, controlling the hot pressing temperature at 130 ℃, and pressurizing for 15min under the pressure of 2 MPa.
And S4, taking the grinding mill obtained after hot pressing in the step S3 out of the die, putting the grinding mill into a curing furnace for curing, and curing at 130 ℃ for 8 hours to obtain a finished product of the shape-modified grinding mill.
The performance of the abrasives obtained in this example was tested, and the test methods and results are as follows.
The test was carried out in accordance with the test method TB/T3196--3Hardness (HRR)123, coefficient of friction 0.55, compressive strength 230MPa, compressive modulus 3.8GPa, impact strength 6.0KJ/m2. Grinding mill 1: 1, a rack shape correction test shows that the wheel rotating speed is 250km/h, the shape correction grinder continuously grinds the wheel, the time required for the wheel to fall 20dB is 4h for a 20-order polygonal wheel, the shape correction efficiency is improved by 20% compared with the existing shape correction grinder, and the abrasion thickness of the grinder is reduced by 3%.
Example 3
The embodiment provides a shape-correcting grinder and a manufacturing method thereof. The shape-modifying abrasive of the present example comprises, by weight: 30% of binder, 10% of tire powder, 25% of friction-increasing filler, 10% of shape-modifying filler, 20% of reinforcing material and 5% of polytetrafluoroethylene powder.
The binder in the embodiment is cashew nut shell oil modified phenolic resin, and the granularity of the tire powder is 100 meshes. The friction-increasing filler is a mixture of limestone and fluorite powder. Wherein the limestone and fluorite are present in an amount of 15% and 10%, respectively, by weight of the total weight of the millbase material. The shape modification filler is a mixture of zircon powder and tungsten carbide powder, wherein the content of the zircon powder and the content of the tungsten carbide powder are both 5%. The reinforcing material of this example is a mixture of hemp fibers and polyvinyl alcohol fibers, wherein the hemp fibers account for 15% of the total weight of the modified grinding mill, and the polyvinyl alcohol fibers account for 5% of the total weight of the modified grinding mill.
The method for manufacturing the shape-modifying grinder of the embodiment comprises the following steps:
s1, pouring 30% of binder, 10% of tire powder, 25% of friction-increasing filler, 10% of shape-modifying filler, 20% of reinforcing material and 5% of polytetrafluoroethylene powder into a mixer according to weight percentage, and mixing for 30 min.
S2, pressing the mixture obtained after the mixing in the step S1 on a hot roller into slices of about 1-2mm, pre-pressing at 120 ℃, and crushing the slices into fragments in a crusher after the slices are cooled.
S3, filling the fragments obtained in the step S2 into a die, starting a hot press, controlling the hot pressing temperature at 150 ℃, and pressurizing for 40min under the pressure of 3 MPa.
And S4, taking the grinding mill obtained after hot pressing in the step S3 out of the die, putting the grinding mill into a curing furnace for curing, and curing for 5 hours at 170 ℃ to obtain a finished product of the shape-modified grinding mill.
The performance of the abrasives obtained in this example was tested, and the test methods and results are as follows.
The test was carried out in accordance with the test method TB/T3196--3Hardness (HRR)118, coefficient of friction 0.62, compressive strength 210MPa, compressive modulus 3.4GPa, impact strength 6.7KJ/m2. Grinding mill 1: 1, a rack shape correction test shows that the wheel rotating speed is 250km/h, the shape correction grinding unit continuously grinds the wheel, the time required for the wheel to fall 20dB is 4.5h for a 20-order polygonal wheel, the shape correction efficiency is improved by 10% compared with the existing grinding unit, and the abrasion thickness of the grinding unit is reduced by 7%.
In each of the above examples, the dressing grind samples were prepared at a ratio of 1: in the test process of the 1 bench, although the shape correction grinders are attached to the wheel treads for a long time and are subjected to high-speed friction, the shape correction grinders do not have the phenomena of heat cracks, metal inlaying and the like. When the shape-correcting grinder provided by the embodiment of the invention is used, the wheel tread is free from damages such as scratch, rapid abrasion and peeling, and the abrasion of the wheel rim is normal.
Tests show that the shape-modifying grinding wheel manufactured by the embodiment of the invention further strengthens the shape-modifying function of the grinding wheel on the basis of keeping the functions of cleaning the tread of the existing grinding wheel, improving the wheel-rail adhesion coefficient and the like, and improves the shape-modifying efficiency of the grinding wheel and the service life of the grinding wheel.
In summary, the shape-modifying grinder according to the embodiment of the present invention includes:30-45% of binder, 4-10% of tire powder, 20-25% of friction-increasing filler, 10-25% of shape-modifying filler, 14-20% of reinforcing material and 1-5% of polytetrafluoroethylene powder. Wherein the binder comprises modified phenolic resin, and the shape-modifying filler comprises tungsten carbide and zircon. By adding the shape modification filler, the component proportion of each component of the grinding mill is adjusted, the shape modification performance of the grinding mill is improved, the polygon emergence of the high-speed motor train unit is inhibited, and the turning mileage of the wheel is prolonged. The shape modifying filler used in the invention comprises zircon and tungsten carbide. The zircon is high in hardness and has glass-like properties, the friction coefficient can be improved under the normal friction working condition, viscoelasticity is increased or the zircon is converted into viscous flow state under the high-temperature friction condition, the wheel can be well ground by the aid of the zircon due to the characteristics, the hardness of the zircon is reduced along with the temperature of the friction surface, and the increase of the abrasion of the wheel tread is avoided. In addition, the tungsten carbide powder added into the grinder can improve the grinding efficiency of the grinder to the initial polygon of the wheel. The density of the shape-modifying grinding mill prepared by the method provided by the embodiment of the invention can reach 1.5-1.9 g-cm-3Hardness (HRR) of 115-123, compression strength of 170-230 MPa, and impact strength of 4.9-6.7 KJ/m2Compared with the existing grinder, the service life of the grinder is prolonged, the weight of the grinder is reduced, and the dressing speed of the grinder to the polygonal wheel is improved by 10-30%.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (7)

1. The shape-modifying grinder is characterized by comprising the following components in percentage by weight:
30-45% of binder, 4-10% of tire powder, 20-25% of friction-increasing filler, 10-25% of shape-modifying filler, 14-20% of reinforcing material and 1-5% of polytetrafluoroethylene powder;
the binder comprises modified phenolic resin, the shape modification filler comprises tungsten carbide and zircon, the content of the zircon accounts for 5% -20% of the total weight of the shape modification grinding particles, the granularity of the zircon is 150-300 meshes, and the granularity of the tungsten carbide is smaller than 800 meshes.
2. The shape-modifying abrasive according to claim 1, wherein the weight ratio of the zircon to the tungsten carbide is (1-4): 1.
3. The shape modifying grinder of claim 1, wherein the binder comprises at least one of a boron-modified phenolic resin, a molybdenum-modified phenolic resin, and a cashew nut shell oil-modified phenolic resin.
4. The modified grinder of claim 1, wherein the reinforcing material comprises at least one of expanded vermiculite, polyvinyl alcohol fibers, hemp fibers.
5. The modifying grinder of claim 1, wherein the friction enhancing filler comprises at least one of cryolite, fluorite, and limestone.
6. A method for manufacturing a shape-modifying grinder, the method comprising:
mixing 30-45% of a binder, 4-10% of tire powder, 20-25% of a friction-increasing filler, 10-25% of a shape-modifying filler, 14-20% of a reinforcing material and 1-5% of polytetrafluoroethylene powder according to weight percentage to obtain a mixture, wherein the binder comprises modified phenolic resin, the shape-modifying filler comprises tungsten carbide and zirconite, the content of the zirconite accounts for 5-20% of the total weight of the shape-modifying grinding particle, the particle size of the zirconite is 150-300 meshes, and the particle size of the tungsten carbide is smaller than 800 meshes;
filling the mixture into a die and performing hot press molding;
and curing the shape-correcting grinder after hot-press molding.
7. The method for manufacturing the shape-modifying grinder as claimed in claim 6, wherein the step of hot press molding includes a step of hot pressing at a temperature of 100 ℃ to 150 ℃; and curing the shape-modifying grinder after hot press molding at 130-170 ℃.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882677A (en) * 1981-11-13 1983-05-18 Noritake Co Ltd Super particle grindstone
CN1110286A (en) * 1994-04-04 1995-10-18 柳俊亚 High temp. resistance non-asbestos friction material
CN103693020A (en) * 2013-11-25 2014-04-02 浙江科特汽配有限公司 Production technology of CRH (China Railway High-speed) train anti-wear and viscosity-increasing grinding ball
CN105909704A (en) * 2016-01-31 2016-08-31 张泽伟 Composite brake pad in excellent thermal diffusivity
CN109336473A (en) * 2018-12-09 2019-02-15 马鞍山市雷狮轨道交通装备有限公司 A kind of ceramic base grinding device for tread cleaner and preparation method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101838437B (en) * 2010-05-31 2012-01-18 山东金麒麟集团有限公司 Modified phenolic resin, preparation process thereof and brake pad cementing agent prepared by using same
CN102766436B (en) * 2012-07-11 2015-03-11 杭州菲英汽车零部件有限公司 New friction material and application thereof
US20170009039A1 (en) * 2014-02-04 2017-01-12 Matsumoto Yushi-Seiyaku Co., Ltd. Masterbatch and applications thereof
CN107915951A (en) * 2017-09-26 2018-04-17 上海国由复合材料科技有限公司 High speed motor car grinding and preparation method
CN108839640B (en) * 2018-05-07 2021-07-02 度特斯(大连)实业有限公司 Grinder for high-speed motor train unit and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882677A (en) * 1981-11-13 1983-05-18 Noritake Co Ltd Super particle grindstone
CN1110286A (en) * 1994-04-04 1995-10-18 柳俊亚 High temp. resistance non-asbestos friction material
CN103693020A (en) * 2013-11-25 2014-04-02 浙江科特汽配有限公司 Production technology of CRH (China Railway High-speed) train anti-wear and viscosity-increasing grinding ball
CN105909704A (en) * 2016-01-31 2016-08-31 张泽伟 Composite brake pad in excellent thermal diffusivity
CN109336473A (en) * 2018-12-09 2019-02-15 马鞍山市雷狮轨道交通装备有限公司 A kind of ceramic base grinding device for tread cleaner and preparation method thereof

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