CN107042474A - A kind of steel rail grinding emery wheel and preparation method thereof - Google Patents
A kind of steel rail grinding emery wheel and preparation method thereof Download PDFInfo
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- CN107042474A CN107042474A CN201710414467.4A CN201710414467A CN107042474A CN 107042474 A CN107042474 A CN 107042474A CN 201710414467 A CN201710414467 A CN 201710414467A CN 107042474 A CN107042474 A CN 107042474A
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- Prior art keywords
- emery wheel
- steel rail
- grinding
- abrasive material
- rail grinding
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
Abstract
The invention belongs to emery wheel making technical field, specifically related to a kind of steel rail grinding emery wheel and preparation method thereof, one of which steel rail grinding emery wheel, including matrix and grinding body, described matrix center is mounting hole, and described matrix front is coaxially arranged with sidewall channels, the grinding body located at the projection matched with sidewall channels around mounting hole, the grinding body and matrix match by raised and sidewall channels and be connected through compacting, sinter after it is obtained, the grinding body is made up of the composition of following parts by weight：100 parts of abrasive material, 15 35 parts of ceramic resin combined binder, 4 10 parts of liquid phenolic resin, 10 30 parts of filler, the abrasive material is made up of following weight percent composition：Fused alumina zirconia 30 70%, carborundum 3 10%, remaining be white fused alumina, it is proposed that a kind of good combination property, can bear heavy load strength vibration polishing and the high steel rail grinding emery wheel of security performance.
Description
Technical field
The invention belongs to emery wheel making technical field, and in particular to a kind of steel rail grinding emery wheel and its preparation side
Method.
Background technology
According to adjustment in 2008《Mid-long term railway network plan》, to the year two thousand twenty, the newly-built high-speed railway of China is up to 1.6
Ten thousand kilometers, other newly built railways and Line of Existing Railway circuit are added, China railways fast passenger transportation network is up to more than 50,000 kilometers,
The city of all provincial capitals and population more than 500,000, national more than 90% population of covering will be connected.High-speed railway, passenger traffic are special
Line requires high to the ride comfort of track structure, Rail Surface, and track condition has very to train operational safety, stationarity
Material impact.Generally acknowledge that steel rail grinding, to ensureing line quality, improves safety coefficient, cut operating costs key in the world at present
Effect.It is to protect that high ferro circuit carries out rail preventive grinding and maintenance polishing after progress rail before opening is polished, opened in advance
Demonstrate,prove the important means of high ferro operation.
Rail grinding train is a kind of complicated, controls advanced, integrates mechanical, electrical, liquid, gas and computer technology
Construction equipment, is mainly used in eliminating the infringement of the rail such as rail ripple, scratch, fat edges and stripping and the preventative of new line rail is beaten
Mill.Coming into operation for this equipment can increase substantially rail utilization rate, increase the service life, and improve degree of passenger comfort, alleviate
Equipment disease.
The sixties in last century, first row rail grinding train in the world was made in Speno companies.Railway is widely used in do
Line steel rail grinding and make with regeneration steel rail laying secondary line on.Currently external main polishing train is：The U.S.
RotraLR series rail grinding machines, the deflection angle of emery wheel is zero degree, 20 degree and 40 degree, 10 meters of captain of polishing, by electronic
Machine drives, and is mainly used in urban public tranlport system.RG301 shaped steel rails polishing train.The deflection angle of emery wheel is up to 45
Degree, it is equipped with 2 kinds of polishing motors of 30.9Kw and 22.1Kw, 84 emery wheels.The flexibility of polishing and precision are all higher.PGM-
48/3rd, PGM-48/4 shaped steel rails polishing train, this car simultaneously using 48 resin wheels, every rail by 24 grinder buffings,
Under the control of the computer, by 12 reconditioning faces rail grinding simultaneously, it is equipped with lateral contour laser detector in addition, detects steel
The rail head cross section of rail is completed by 8 laser beams.The rail grinding train manufactured by Jackson companies has 20 emery wheels, beats
The power of electric mill machine is 441.3Kw, and it is mainly used in gauge 1676mm steel rail grinding.What Canadian BCTransit was used
The rail grinding train manufactured by Jackson companies, has 8 emery wheels, the power of polishing motor is 294.2Kw, and it is mainly full
The need under the special line condition such as sufficient heavy grade and minor radius.If the polishing locomotive main GWM110 of also SPENO productions,
210th, 320,440 multipurpose rail grinding machine, SBM200 shaped steel rail grinding machines；The gentle rail grinding convertible car of SBM111 moulding plane
Deng.
During high-speed railway operation, the rail contact fatigue damage of railway is mainly shown as rail level stripping, waveform
Abrasion, the feedback of rail head pressure, crackle and rail fracture etc., have a strong impact on the security and economy of railway transportation.Many high ferro circuits
Curved steel rail occurs in that oblique line shape crackle respectively, crack growth to a certain extent after just Quick Extended, form large scale laterally tired
Labor crackle, until fracture, forms huge hidden danger to traffic safety.
During operation, due to the increase of fatigue defect, the maintenance and maintenance of rail just seem more and more important.Rail
A kind of important method of the grinding technology as railway department in track maintenance and repair, can eliminate and restrain rail level wound
Damage, extend rail service life, therefore be at home and abroad widely used, generate huge economic benefit, it has also become
The conventional maintenance maintenance technique of rail track in world wide.
Most important workpiece is emery wheel in rail in high speed railway bruting process, and steel rail grinding emery wheel is that one kind requires non-
Often high special grinding apparatus, carries out vibration reconditioning, the pressure of vertical direction is added using hydraulic regulation during polishing using the end face of emery wheel
Pressure, therefore, the load that emery wheel is born is very big, it is necessary to which emery wheel has intensity height, wearability is good, grinding ratio is high, good weatherability
The features such as.Abrasive material that emery wheel is used must compact structure, thermophysical property it is good.It is selected that the necessary intensity of bonding agent is high, wear-resisting
Property it is good, self-sharpening is excellent, so just can guarantee that emery wheel can bear the strength vibration polishing of heavy load, and shape is protected in bruting process
Hold intact, meet the requirement of steel rail grinding.
At present, the technology on rail polishing emery wheel is it has been reported that commercially available emery wheel or use abrasive species is more single
One, either unreasonable or filler composition the selection of bonding agent selection is not bery appropriate, or between abrasive material and filler, bonding agent
Proportioning it is unreasonable, these emery wheels can not satisfactorily complete under heavy load strength vibration polishing task.
The content of the invention
The purpose of the present invention is to be directed to the above-mentioned problems in the prior art, it is proposed that a kind of good combination property, can be held
Strength vibration polishing and the high steel rail grinding emery wheel of security performance by heavy load.
To realize above-mentioned technical purpose, the technical solution adopted by the present invention is as follows：
A kind of steel rail grinding emery wheel, including matrix and grinding body, described matrix center are mounting hole, described matrix front
It is coaxially arranged with around mounting hole on sidewall channels, the grinding body located at the projection matched with sidewall channels, the grinding body and base
Body be connected through by the matching of raised and sidewall channels it is obtained after compacting, sintering, the grinding body by following parts by weight composition
Composition：100 parts of abrasive material, 15-35 parts of ceramic resin combined binder, 4-10 parts of liquid phenolic resin, 10-30 parts of filler.
Further limit, the abrasive material is made up of following weight percent composition：The abrasive material is by following percentage by weight
Composition is constituted：Fused alumina zirconia：30-70%, carborundum：3-10%, remaining be white fused alumina, such design, with reference to respective advantage,
The performance of emery wheel can be made to be optimal state, to meet the grinding requirement of high intensity.Wherein described fused alumina zirconia be with bauxite (or
Alumdum), zircon sand, anthracite and iron filings be raw material, through 2000 DEG C of high temperature above meltings in electric arc furnaces, liquation through chilling,
Broken granulation is formed, and is α-Al2O3 and Al2O3-ZrO2 eutectic compound, and the toughness of fused alumina zirconia is big, intensity is high, wearability
It is good.In grinding process is shaken to the strength of rail, high grinding efficiency is shown.Also have and be difficult burn workpiece, emery wheel
The advantages of surface is not easily blocked, is completely suitable for the demand of grinding rail of the present invention；A small amount of carbonization is also added in abrasive material
Silicon, although carborundum grinding applicability and corundum are on the contrary, following reaction occurs for its meeting and rail：SiC+4Fe → FeSi+Fe3C,
It should not be used in grinding rail.Research is intermittent with rail in grinding process, it was also found that when containing a small amount of carborundum in emery wheel
React, be improved the effect of grinding efficiency.And carborundum has that corrosion-resistant, high temperature resistant, intensity are big, microhardness is high,
The characteristics such as heat conductivility is good, shock resistance, add the grinding efficiency that appropriate carborundum not only facilitates emery wheel, can also improve
The performance such as the intensity of emery wheel, weatherability, antifatigue, extends the service life of emery wheel.Because carborundum can react with rail,
The addition of carborundum needs control, therefore, and the present invention controls the content of carborundum in the range of the 3-10% of abrasive material.Bai Gang
Jade is cooled down after 2000 DEG C of high temperature above meltings in electric furnace and is made using industrial alumina powder as raw material, size-reduced, shaping, magnetic
De-iron is selected, a variety of granularities are sieved into, the quality densification of white fused alumina abrasive material, hardness are high, and particle shape is pointed at shape, it is adaptable to manufacture pottery
Porcelain, resin bonded abrasives and grinding, polishing, sandblasting, hot investment casting (the special corundum of essence casting) etc., it may also be used for manufacture is senior resistance to
Fiery material.
Further limit, the granularity of the abrasive material is F8-F120, such design, make more to smooth out rail grinding,
Precision is more preferable.
Further limit, the ceramic resin combined binder is comprised the following raw materials by weight percent：Ceramic bond
Agent 30~70%, resinoid bond 30~70%, the composition of the vitrified bond is：SiO2：25-40%, B2O3：15-
30%, Al2O3：1-5%, CaO：1-4%, BaO：2-5%, ZnO：7-16%, Na2O：15-24%, K2O：1-3, it is such to set
Meter, the intensity of vitrified bond is high, and high temperature resistant, service life is long, and it is fragile material to have the disadvantage ceramics, and rupture strength is low, resin
The resistance to elevated temperatures of bonding agent is poor, is ground sharp.The self-sharpening of vitrified bond and resinoid bond is all fine.By two kinds of combinations
Agent is used in mixed way, and can play the strong point of the two, effectively overcomes the hard to bear high temperature of resinoid bond and vitrified bond fragility big
Shortcoming.
Further limit, resinoid bond is phenol-formaldehyde resin powder in the ceramic resin combined binder, the phenolic aldehyde tree
The particle diameter of cosmetics be 100#-320#, such design, phenolic resin elasticity is good, wear intensity is excellent, intensity is high, hardness is big, resistance to
Hot good, grinding consumes the features such as small, grinding efficiency is high, grinding accuracy is good, and with excellent Adhesion property, unique anti-burning
Corrosion energy, fire resistance.
Further limit, vitrified bond particle diameter is 100#-320# in the ceramic resin combined binder, such to set
Meter, emery wheel is conducive to chip removal to hold bits and radiate when being ground, wear resistance ratio is very small, is difficult workpiece of burning；The self-sharpening of emery wheel compares
Good, finishing interlude is long, and finishing is easier.
Further limit, the filler is made up of following weight percent composition：Ice crystal:5-15%, barite：10-
25%th, iron oxide：6-15%, fluorite：10-30%, remaining be iron sulfide, such design, filler is added to emery wheel of the present invention
Molding mass in, can play a part of improve wheel grinding performance and reduce use cost；Because emery wheel of the present invention is used for steel
Rail is polished, if in polishing with the presence of sulphur or halogen vapour at grinding, both can make the metallic bond of the material (iron) of rail
Fracture, so that the ability of polishing rail is greatly improved；Therefore, the present invention adds certain in the filler of steel rail grinding emery wheel
The barite and iron sulfide of amount；Barite is with the nonmetal mineral product that barium sulfate (BaSO4) is main component, it and iron sulfide
All contain sulphur, sulphur can be provided in emery wheel reconditioning rail, so as to improve wheel grinding effect；And iron oxide mainly rises in filler
To strengthening action, the heat resistance of grinding tool is improved；Fluorite can be decomposed in the presence of grinding heat, played increase grinding tool self-sharpening, subtracted
The effect burnt less；The main component ice crystal fusing point of filler is relatively low, can reduce grinding heat, strengthens the self-sharpening of emery wheel, prevents
Only wheel topography, improves stone efficiency.
Further limit, the particle diameter of the filler is 100#-320#, such design, filler as abrasive material filling material
Material, its particle diameter should coordinate with the particle diameter of abrasive material, reach a good filling effect, increase the consistency of emery wheel, improve mill
Loss-rate.
Further limit, described matrix is formed by metal material die casting, such design, the matrix being made up of metal material
Can ensure intensity, stress distribution of emery wheel etc., obtain that performance is good and safely and effectively rail grinding wheel, further preferably by
Iron or aluminium alloy compression casting are formed.
Another object of the present invention is the preparation method for providing above-mentioned steel rail grinding emery wheel, the preparation method include with
Lower step：
Step one：Weigh raw material, first liquid phenolic resin is added in abrasive material and is stirred to abrasive material fully infiltrates, while by filler
It is well mixed with bonding agent and obtains powder, be then added to the abrasive material soaked in the powder mixed, stirring is obtained for 1-2 hours
To molding mass；Sieved after molding mass is well mixed by 10 eye mesh screens.
Step 2：Graphite jig is assembled, matrix is put into, the molding mass sieved in approrpiate wts step one is weighed, then
Put it into mould and shakeout.Mould is assembled to be put into hot-pressed sintering furnace, under 2~10Mpa pressure be cold-pressed 10~
20min；Then begin to warm up, temperature rises to 390 DEG C within 15-30 minutes, be incubated 20 minutes at 390 DEG C, be warming up within 10-15 minutes
460 DEG C, 10 minutes are incubated at 460 DEG C, keeps pressure 6Mpa constant in whole heating process.Then cool down after obtain emery wheel block into
Product.
Further limit, cold pressing pressure 10Mpa is optimal in the step 2.
It should be noted that the present invention during mixed ingredients, first with liquid phenolic resin soak abrasive material, while by filler with
Phenol-formaldehyde resin powder is well mixed, and is added ceramic powder mixing, is finally again added the abrasive material soaked in well mixed powder,
The effective filler that avoids adds the problem of easily producing powder ball in the abrasive material soaked with phenol-formaldehyde resin powder, therefore, in batch mixing
After need again to screen molding mass, both improved the production efficiency of emery wheel, also indirectly saved production cost.
The present invention mixed ingredients, shaping, shove charge, sintering, cool down, come out of the stove during, if operating improper, temperature, pressure
Deng control it is improper, easily caused stick up it is stupefied, bubble, expand, deforming, collapsing, red heart, hardness are uniform, revolution rupture, fall side, fall
The waste product of the types such as angle.Therefore, it is necessary to prepare steel rail grinding emery wheel of the present invention in strict accordance with above-mentioned technological parameter, improve
Product qualification rate, product is through packaging and storage after the assay was approved.
Compared with prior art, the present invention has following advantage：
1) matrix of steel rail grinding emery wheel of the present invention and grinding body bond strength height, security are good, it is not necessary to outside emery wheel
The materials such as periphery winding glass fibre are enclosed to ensure safety.
2) constituent and its parts by weight reasonable mixture ratio of the grinding body of steel rail grinding emery wheel of the present invention, the emery wheel of preparation
Intensity is high, big, elastic good, the heat-resist, self-sharpening of hardness is good, good weatherability, can bear the strength vibromill under heavy load
Cut, grinding efficiency is high, surface smoothness is good after grinding, the requirement of rail grinding can be fully met.
3) the particle diameter compatibility of abrasive material in the grinding body of steel rail grinding emery wheel of the present invention, phenol-formaldehyde resin powder, ceramic powder and filler
Rationally, mix more uniform, obtained emery wheel combination property more preferably, is more smoothed out, precision with the rail after grinder buffing of the present invention
It is higher.
4) preparation technology of rail abrasive grinding wheel of the present invention it is simple, rationally, the cycle it is short.By rationally setting with regard to this can be reached
Conditional parameter in the shaping and hardening process of the requirement of invention grinding wheel performance, is made density, intensity, hardness and toughness etc. comprehensive
Can preferable rail grinding wheel.
Brief description of the drawings
The nonlimiting examples that the present invention can be provided by accompanying drawing are further illustrated；
Fig. 1 is a kind of first dimensional structure diagram of steel rail grinding emery wheel of the invention；
Fig. 2 is a kind of second dimensional structure diagram of steel rail grinding emery wheel of the invention；
Main element symbol description is as follows：
Matrix 1, sidewall channels 11, mounting hole 2, grinding body 3, projection 31.
Embodiment
In order that the present invention may be better understood in those skilled in the art, with reference to the accompanying drawings and examples to this hair
Bright technical scheme is further illustrated.
Table 1：The constituent and its parts by weight of 1-5 steel rail grinding emery wheels of the embodiment of the present invention：
Embodiment 1：
First, weighed by the constituent and its parts by weight of the rail abrasive grinding wheel of embodiment in table 11 in raw material, raw material
The Task-size Controlling of abrasive material is in F16-F100, and the particle diameter of phenol-formaldehyde resin powder is 100#-320#, and the particle diameter of filler is 100#-320#.So
Liquid phenolic resin stirring 8min is added in abrasive material afterwards fully to infiltrate to abrasive material, while by filler and phenol-formaldehyde resin powder, ceramic junction
Mixture is well mixed to obtain powder, is finally added to the abrasive material soaked in the powder mixed, stirring is molded for 2 hours
Material, well mixed molding mass is sieved by 10# screen clothes.
Then mould is assembled, cast iron matrix is put into, the molding mass of approrpiate wts is weighed, puts it into mould and spreads out
It is flat, it is 25 DEG C in temperature, then pressure begin to warm up, temperature rises to 390 DEG C within 15-30 minutes to suppress 60s under the conditions of 10Mpa,
30 minutes are incubated at 390 DEG C, 460 DEG C are warming up within 10-15 minutes, 10 minutes are incubated at 460 DEG C, pressure is kept in whole heating process
Power 6Mpa is constant.Then emery wheel block finished product is obtained after cooling down.Finally obtained steel rail grinding finished grinding wheel is tested, it is qualified
Packaging and storage afterwards.
Embodiment 2：
First, weighed by the constituent and its parts by weight of the steel rail grinding emery wheel of embodiment in table 12 in raw material, raw material
The Task-size Controlling of abrasive material is in F24-F120, and the particle diameter of phenol-formaldehyde resin powder is 100#-320#, and the particle diameter of filler is 100#-320#.So
Liquid phenolic resin stirring 8min is added in abrasive material afterwards fully to infiltrate to abrasive material, while by filler and phenol-formaldehyde resin powder, ceramic junction
Mixture is well mixed to obtain powder, is finally added to the abrasive material soaked in the powder mixed, stirring is molded for 2 hours
Material, well mixed molding mass is sieved by 10# screen clothes.
Then mould is assembled, cast iron matrix is put into, the molding mass of approrpiate wts is weighed, puts it into mould and spreads out
It is flat, it is 25 DEG C in temperature, then pressure begin to warm up, temperature rises to 390 DEG C within 15-30 minutes to suppress 60s under the conditions of 10Mpa,
30 minutes are incubated at 390 DEG C, 460 DEG C are warming up within 10-15 minutes, 10 minutes are incubated at 460 DEG C, pressure is kept in whole heating process
Power 6Mpa is constant.Then emery wheel block finished product is obtained after cooling down；Finally obtained steel rail grinding finished grinding wheel is tested, it is qualified
Packaging and storage afterwards.
Embodiment 3：
First, weighed by the constituent and its parts by weight of the rail abrasive grinding wheel of embodiment in table 13 in raw material, raw material
The Task-size Controlling of abrasive material is in F24-F80, and the particle diameter of phenol-formaldehyde resin powder is 100#-320#, and the particle diameter of filler is 100#-320#.So
Liquid phenolic resin stirring 8min is added in abrasive material afterwards fully to infiltrate to abrasive material, while by filler and phenol-formaldehyde resin powder, ceramic junction
Mixture is well mixed to obtain powder, is finally added to the abrasive material soaked in the powder mixed, stirring is molded for 2 hours
Material, well mixed molding mass is sieved by 10# screen clothes.
Then mould is assembled, cast iron matrix is put into, the molding mass of approrpiate wts is weighed, puts it into mould and spreads out
It is flat, it is 25 DEG C in temperature, then pressure begin to warm up, temperature rises to 390 DEG C within 15-30 minutes to suppress 60s under the conditions of 10Mpa,
20 minutes are incubated at 390 DEG C, 460 DEG C are warming up within 10-15 minutes, 20 minutes are incubated at 460 DEG C, pressure is kept in whole heating process
Power 6Mpa is constant.Then emery wheel block finished product is obtained after cooling down；Finally obtained steel rail grinding finished grinding wheel is tested, it is qualified
Packaging and storage afterwards.
Embodiment 4：
First, weighed by the constituent and its parts by weight of the steel rail grinding emery wheel of embodiment in table 14 in raw material, raw material
The Task-size Controlling of abrasive material is in F24-F80, and the particle diameter of phenol-formaldehyde resin powder is 100#-320#, and the particle diameter of filler is 100#-320#.So
Liquid phenolic resin stirring 8min is added in abrasive material afterwards fully to infiltrate to abrasive material, while by filler and phenol-formaldehyde resin powder, ceramic junction
Mixture is well mixed to obtain powder, is finally added to the abrasive material soaked in the powder mixed, stirring is molded for 2 hours
Material, well mixed molding mass is sieved by 10# screen clothes.
Then mould is assembled, cast iron matrix is put into, the molding mass of approrpiate wts is weighed, puts it into mould and spreads out
It is flat, it is 25 DEG C in temperature, then pressure begin to warm up, temperature rises to 420 DEG C within 15-30 minutes to suppress 60s under the conditions of 10Mpa,
30 minutes are incubated at 420 DEG C, 500 DEG C are warming up within 10-15 minutes, 10 minutes are incubated at 500 DEG C, pressure is kept in whole heating process
Power 6Mpa is constant.Then emery wheel block finished product is obtained after cooling down；Finally obtained steel rail grinding finished grinding wheel is tested, it is qualified
Packaging and storage afterwards.
Embodiment 5：
First, weighed by the constituent and its parts by weight of the steel rail grinding emery wheel of embodiment in table 15 in raw material, raw material
The Task-size Controlling of abrasive material is in F24-F120, and the particle diameter of phenol-formaldehyde resin powder is 100#-320#, and the particle diameter of filler is 100#-320#.So
Liquid phenolic resin stirring 8min is added in abrasive material afterwards fully to infiltrate to abrasive material, while by filler and phenol-formaldehyde resin powder, ceramic junction
Mixture is well mixed to obtain powder, is finally added to the abrasive material soaked in the powder mixed, stirring is molded for 2 hours
Material, well mixed molding mass is sieved by 10# screen clothes.
Then, mould is assembled, cast iron matrix is put into, the molding mass of approrpiate wts is weighed, puts it into mould
Shakeout, be 25 DEG C in temperature, then pressure begin to warm up, temperature rises to 420 within 15-30 minutes to suppress 60s under the conditions of 10Mpa
DEG C, 30 minutes are incubated at 420 DEG C, 500 DEG C are warming up within 10-15 minutes, 10 minutes are incubated at 500 DEG C, is protected in whole heating process
Hold pressure 6Mpa constant.Then emery wheel block finished product is obtained after cooling down；Finally obtained rail abrasive grinding wheel finished product is tested,
Packaging and storage.
Rail abrasive grinding wheel made from above-described embodiment 1-5 is subjected to performance test respectively, test result is as shown in table 2：
Table 2：The performance test results of rail abrasive grinding wheel made from 1-5 of the embodiment of the present invention：
As known from Table 2, steel rail grinding Wheel hardness, elasticity, heat resistance, self-sharpening etc. made from the embodiment of the present invention are comprehensive
Functional, wear resistance ratio is higher, can bear the strength vibration reconditioning of heavy load, with higher mill efficiency, rail after grinding
Surface smoothness is high, fully meets the requirement of steel rail grinding.
A kind of steel rail grinding emery wheel provided above the present invention and preparation method thereof is described in detail.It is specific real
The explanation for applying example is only intended to the method and its core concept for helping to understand the present invention.It should be pointed out that for the art
For those of ordinary skill, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention,
These are improved and modification is also fallen into the protection domain of the claims in the present invention.
Claims (10)
1. a kind of steel rail grinding emery wheel, it is characterised in that：Including matrix and grinding body, described matrix center is mounting hole, institute
Front side of matrix is stated to be coaxially arranged with located at the projection matched with sidewall channels on sidewall channels, the grinding body around mounting hole, it is described
Grinding body and matrix match by raised and sidewall channels and be connected through compacting, sinter after it is obtained, the grinding body is by following weight
The composition composition of number：100 parts of abrasive material, 15-35 parts of ceramic resin combined binder, 4-10 parts of liquid phenolic resin, filler 10-30
Part.
2. a kind of steel rail grinding emery wheel according to claim 1, it is characterised in that：The abrasive material is by following percentage by weight
Composition is constituted：Fused alumina zirconia 30-70%, carborundum 3-10%, remaining be white fused alumina.
3. a kind of steel rail grinding emery wheel according to claim 2, it is characterised in that：The granularity of the abrasive material is F8-F120.
4. a kind of steel rail grinding emery wheel according to claim 3, it is characterised in that：The ceramic resin combined binder by
The raw material composition of following percentage by weight：Vitrified bond 30~70%, resinoid bond 30~70%, the vitrified bond
Composition be：SiO2：25-40%, B2O3：15-30%, Al2O3：1-5%, CaO：1-4%, BaO：2-5%, ZnO：7-
16%, Na2O：15-24%, K2O：1-3%.
5. a kind of steel rail grinding emery wheel according to claim 4, it is characterised in that in the ceramic resin combined binder
Resinoid bond is phenol-formaldehyde resin powder, and the phenol-formaldehyde resin powder particle diameter is 100#-320#.
6. a kind of steel rail grinding emery wheel according to claim 5, it is characterised in that：In the ceramic resin combined binder
Vitrified bond particle diameter is 100#-320#.
7. a kind of steel rail grinding emery wheel according to claim 6, it is characterised in that：The filler is by following percentage by weight
Composition is constituted：Ice crystal:15-20%, barite：10-25%, iron oxide：4-10%, fluorite：10-20%, surplus are vulcanization
Iron.
8. a kind of steel rail grinding emery wheel according to claim 7, it is characterised in that the particle diameter of the filler is 100#-
320#。
9. a kind of preparation method of steel rail grinding emery wheel as described in any one in claim 1~8, it is characterised in that institute
Preparation method is stated to comprise the following steps：
Step one：Raw material is weighed, the first addition liquid phenolic resin in abrasive material, which is stirred to abrasive material, fully to be infiltrated, while by filler and again
Conjunction bonding agent is well mixed to obtain powder, is then added to the abrasive material soaked in the powder mixed, and stirring is obtained for 1-2 hours
To molding mass, sieved after molding mass is well mixed by 10# screen clothes.
Step 2：Graphite jig is assembled, matrix is put into, the molding mass sieved in approrpiate wts step one is weighed, then by it
Be put into mould and shakeout, assemble mould and be put into hot-pressed sintering furnace, under 2~10Mpa pressure be cold-pressed 10~
20min, then begins to warm up, and temperature rises to 390 DEG C within 15-30 minutes, is incubated 30 minutes at 390 DEG C, is warming up within 10-15 minutes
460 DEG C, 10 minutes are incubated at 460 DEG C, keeps pressure 6Mpa constant in whole heating process, obtained after then cooling down emery wheel into
Product.
10. preparation method according to claim 9, it is characterised in that：Pressure 10Mpa is cold-pressed in the step 2 for most
It is excellent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710414467.4A CN107042474A (en) | 2017-06-05 | 2017-06-05 | A kind of steel rail grinding emery wheel and preparation method thereof |
Applications Claiming Priority (1)
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| CN109048691A (en) * | 2018-07-18 | 2018-12-21 | 佛山市鼎和超硬材料制品有限公司 | A kind of edging wheel and its preparation process |
| CN109968221A (en) * | 2017-12-27 | 2019-07-05 | 山东圣泉新材料股份有限公司 | High-intensitive heavy duty grinding wheel and preparation method |
| CN110328623A (en) * | 2019-07-23 | 2019-10-15 | 广州奥拓夫精密智能制造有限公司 | A kind of precision cutting grinding wheel |
| CN111515873A (en) * | 2020-05-27 | 2020-08-11 | 中铁隆昌铁路器材有限公司 | Novel grinding wheel special for steel rail milling and grinding vehicle and preparation method thereof |
| CN111604820A (en) * | 2020-05-27 | 2020-09-01 | 中铁隆昌铁路器材有限公司 | Porous steel rail grinding CBN grinding wheel and preparation method thereof |
| CN112647375A (en) * | 2020-09-07 | 2021-04-13 | 湖南大学 | Vibration grinding steel rail grinding method |
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| CN111604820A (en) * | 2020-05-27 | 2020-09-01 | 中铁隆昌铁路器材有限公司 | Porous steel rail grinding CBN grinding wheel and preparation method thereof |
| CN112647375A (en) * | 2020-09-07 | 2021-04-13 | 湖南大学 | Vibration grinding steel rail grinding method |
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Application publication date: 20170815 |