CN110497326A - A kind of resin wheel and preparation method thereof for rail cutting - Google Patents
A kind of resin wheel and preparation method thereof for rail cutting Download PDFInfo
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- CN110497326A CN110497326A CN201910812305.5A CN201910812305A CN110497326A CN 110497326 A CN110497326 A CN 110497326A CN 201910812305 A CN201910812305 A CN 201910812305A CN 110497326 A CN110497326 A CN 110497326A
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- 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
-
- 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
- B24D3/20—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 and being essentially organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
- B24D3/285—Reaction products obtained from aldehydes or ketones
-
- 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
- B24D3/344—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 the bonding agent being organic
-
- 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
- B24D3/346—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 utilised during polishing, or grinding operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/12—Cut-off wheels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention discloses a kind of resin wheels and preparation method thereof for rail cutting, are related to the technical field of grinding wheel manufacture and production, include the component of following parts by weight in formula: 7-9 parts of single alundum；7-9 parts of fused alumina zirconia；3.8-4.2 parts of silicon carbide；2.8-3.2 parts of bonding agent；0.8-1.2 parts of potassium sulfate；Wherein bonding agent includes phenol-formaldehyde resin powder and liquid phenolic resin, and the weight fraction ratio of phenol-formaldehyde resin powder and liquid phenolic resin is 2:1-3:1.This production method for being used for the resin wheel of rail cutting includes mixing procedure and moulding process, and mixing procedure is the following steps are included: A1. is blended premix, A2. is blended coarse sand material, A3. coarse sand material screen material；Moulding process is the following steps are included: B1. molding mass is laid with, B2. is press-formed, B3. drying hardening.The present invention has cutting efficiency high, not easy to wear to technical effect with long service life.
Description
Technical field
The present invention relates to resin wheel manufacture with production technical field, more particularly, to it is a kind of for rail cutting
Resin wheel and preparation method thereof.
Background technique
Resin wheel is the grinding wheel being made into resin, with intensity is high, heat resistance is low, self-sharpening is good, simple for production, technique
The features such as period is short is widely used in corase grinding, snagging, cutting and is freely ground, and such as grinds steel ingot, and casting deburrs, is commonly used for cutting
Pitch cutting, heavy duty grinding wheel, polishing wheel etc..Resin wheel is widely used in the fields such as mechanical metallurgy, building, military project, construction of railways,
It is mainly used for the cutting and polishing of the common metals material such as steel pipe, fashioned iron, reinforcing bar.
Resin wheel is divided by abrasive material is generally divided into ordinary resin grinding wheel and superhard resin wheel.Ordinary resin grinding wheel be with
The conventional abrasive materials such as white fused alumina, Brown Alundum, silicon carbide are the grinding wheel being mainly ground to point, superhard resin wheel be with diamond or
CBN is the grinding wheel being mainly ground to point.It is most common above ordinary resin grinding wheel market to have ordinary resin cutting sheet and common tree
Rouge grinding, typical diameters 100,180,230,300,350,400,500.Mainly there is superhard tree above superhard resin wheel market
Rouge cutting sheet and superhard resin mill, the diameter of common cutting sheet are 100,125,150,200.The specification of common mill is straight
Diameter is 150,200,250,300,400.
The corundum abrasive grinding wheel of resinoid bond is widely used in the train of rail reconditioning at present, since resinoid bond is to abrasive material
Holding power is weaker, and abrasive material is easy to fall off, and causes grinding wheel service life shorter；Corundum abrasive is in high-speed overload lotus grinding condition simultaneously
Under, grinding cutting edge consumption is very fast, is easily passivated, causes grinding wheel not sharp enough in long-term use, generate high grinding heat, lead to rail
Material removal low efficiency, rail thinning surface is of poor quality, is easy to burn blue phenomenon occur.
Summary of the invention
It is high, not easy to wear to which long service life is cut for rail that the purpose of the present invention one is to provide a kind of cutting efficiency
Resin wheel；The purpose of the present invention two is to provide the production method for the resin wheel that rail is cut.
The technical scheme is that:
A kind of resin wheel for rail cutting, the component including following parts by weight:
Wherein bonding agent includes phenol-formaldehyde resin powder and liquid phenolic resin, and the weight fraction ratio of phenol-formaldehyde resin powder and liquid phenolic resin is
2:1-3:1。
By using above-mentioned technical proposal, the basic abrasive material of single alundum, fused alumina zirconia and silicon carbide as resin wheel, tool
There is the good grinding performance of beam.Wherein single alundum is the big grain of the hardness height generated using special process spontaneous nucleation, toughness
Degree product are a kind of extraordinary heat-resisting high-grade grinding-materials of toughness, are suitable for closing high-vanadium high-speed steel, austenitic stainless steel, titanium
The high rigidity such as gold, the cutting grinding of high tenacity workpiece, the especially grinding for dry grinding with easily-deformable easy burn workpiece.Zirconium
Corundum is strong but pliable in texture, compact structure, intensity are high, heat resistance and resistance to melt aggressivity are good, therefore is used for as a kind of advanced abrasive material
High performance heavy duty grinding wheel is manufactured, has good ablation to steel part, ironcasting, heat resisting steel and various alloy materials.
Silicon carbide hardness is higher than white fused alumina, and property is crisp and sharp, and the hardness, self-sharpening and thermal conductivity of grinding wheel can be enhanced, improve grinding wheel
Cutting efficiency and the grinding temperature for reducing grinding wheel.
Phenol-formaldehyde resin powder and liquid phenolic resin get up loose abrasive material consolidation as bonding agent, and being formed has grinding function
Grinding wheel.Wherein liquid phenolic resin is the wetting agent of abrasive material, and phenol-formaldehyde resin powder is main bonding agent.Liquid phenolic resin infiltration is attached to
Abrasive particle surface forms a thin resin film, when abrasive material that this surface is infiltrated and phenol-formaldehyde resin powder and ice crystal and
When the fleuts such as potassium sulfate mix, flour will effectively be bonded in the abrasive surface for having infiltrated resin, to phenolic aldehyde tree
Rouge liquid and phenol-formaldehyde resin powder crosslinking curing, can play good cementation, and grinding wheel material is allow to keep stable in compacting
Blank shape.Donor of the potassium sulfate as sulphur, provides sulphur in cutting process, to promote the disconnected of metal material chemical bond
It splits, improves the cutting power and efficiency of grinding wheel.
Resin wheel as abrasive material, enhances the hardness of grinding wheel, toughness, heat-resisting using single alundum, fused alumina zirconia and silicon carbide
Property and grinding performance, improve wheel strength self-sharpening and cutting efficiency；Phenol-formaldehyde resin powder and liquid phenolic resin will as bonding agent
Abrasive material carries out secure bond, reduces grinding wheel brittleness, extends the service life of grinding wheel.
It is further arranged to: further including 1.8-2.2 parts of high-purity troilite powder.
By using above-mentioned technical proposal, troilite powder exists in the form of micro mist, and a part of troilite powder exists
Oxidation reaction occurs between 450-475 DEG C, the oxygen in consumed cabin air is to reduce the oxidation to resin and the oxidation to workpiece
Burn extends grinding wheel high temperature operating life.A part of troilite powder is decomposed reactive absorption heat at 650 DEG C or so, from
And reduce wheel grinding temperature.Some troilite powder enters molten condition at 1100 degree or so, becomes good profit
Lubrication prescription protects grinding wheel.During this, sulphur, sulfur dioxide, sulfur trioxide and the workpiece surface that each reaction generates react,
Generate FexSY, form protective layer and play the role of lubrication protection to wheel face as lubricant.
Be further arranged to: the phenol-formaldehyde resin powder is thermoplastic phenolic resin, and the liquid phenolic resin is thermosetting property phenol
Urea formaldehyde.
By using above-mentioned technical proposal, phenol-formaldehyde resin powder is thermoplastic phenolic resin and is used as main knot in grinding wheel abrasive material
Mixture, the fluidity with higher when heated connect so that abrasive material is carried out cladding with filler；And liquid phenolic resin is thermosetting
Property phenolic resin, heat cured liquid phenolic resin is thermal post curing, make grinding wheel material compacting when keep stable blank shape.This
Outside, liquid phenolic resin can also be crosslinked with phenol-formaldehyde resin powder in solidification and be reacted, so that crosslinking curing, further increases sand
The adhesion strength and structural strength of wheel.
A kind of production method of the resin wheel for rail cutting, including mixing procedure and moulding process, the mixing
Technique the following steps are included:
A1. be blended premix: single alundum, fused alumina zirconia, silicon carbide are mixed evenly to form abrasive material, and phenolic aldehyde is added into abrasive material
Resin liquid is uniformly mixed and forms premix；
A2. be blended coarse sand material: potassium sulfate, high-purity troilite powder and phenol-formaldehyde resin powder are mixed evenly to form mixed powder
Material, compound powder is mixed with premix obtained in A1 step, is uniformly mixed and is formed coarse sand material；
A3. coarse sand material screen material: successively passing through 12 mesh for coarse sand material obtained in A2 step and 14 mesh screens carry out sieve material, finally
To molding mass；
The moulding process the following steps are included:
B1. molding mass is laid with: taking three layers of molding mass obtained in step A3 point to be laid in molding die, and adjacent two layers one-tenth
Glass fiber mesh is placed between moulding mixture；
B2. it is press-formed: being laid with molding molding mass surface in step bl is determined and be laid with the trade mark scraps of paper, then in molding mass centre of surface
Grinding wheel washer is placed, then half hot-forming obtains forming grinding wheel；
B3. drying hardening: forming grinding wheel obtained in step B2 is dried to forming grinding wheel hardening, obtains finished product grinding wheel.
By using above-mentioned technical proposal, in the step A1 of mixing procedure, first single alundum, fused alumina zirconia and silicon carbide are mixed
It after merging stirs evenly and to form abrasive material, adds liquid phenolic resin and is uniformly mixed and form premix, keep liquid phenolic resin first abundant
Infiltration is attached to abrasive particle surface, forms a thin resin film.In step A2, abrasive material and phenol that this surface is infiltrated
When the fleuts such as urea formaldehyde powder, potassium sulfate, high-purity troilite powder mix, flour, which will be effectively bonded in, have been soaked
Moisten the abrasive surface of resin, and then play good cementation, grinding wheel material is allow to keep stable green body shape in compacting
Shape.
In step A3, coarse sand material successively passes through 12 mesh and 14 mesh screens carry out sieve material, can will generate in mixing process
Dough, material block screen out, and keep mix size uniformly and loose, make even density after abrasive wheel forming, mechanical property is more excellent.
In the step B1 of moulding process, three layers of molding mass point are laid with and are laid with glass fiber mesh, glass between adjacent two layers
Heat resistance, the high temperature resistant cutting, structural strength of grinding wheel can be improved in enhancing base materials of the web as phenolic resin binder
And bending strength.
In step B2, it is being laid with the molding molding mass surface laying trade mark scraps of paper and is placing grinding wheel washer at center, then
Heating pressurization is integrally formed molding mass, glass fiber mesh, the trade mark scraps of paper and grinding wheel washer, connects between the different component of grinding wheel
Even closer secured, the overall structural strength of grinding wheel is higher, and service performance is more preferable.During this heat cured liquid phenolic resin with
Thermoplastic phenol-formaldehyde resin powder crosslinks solidification, and the abrasive material in grinding wheel is closely bonded together, and improves grinding wheel knot
Structure intensity.
Be further arranged to: in the A3 step, coarse sand material is 20- in temperature T1 by the sieving materials after 12 mesh screens
25 DEG C, humidityTo park under the conditions of 60-70, storage period t1 is 2-24h, then carries out 14 mesh mesh screen material.
By using above-mentioned technical proposal, the bulk density of mixture is just stablized after coarse sand material is parked 2-24 hours, in turn
Make the consistent in density of semi-finished product grinding wheel green body after molding everywhere, guarantee grinding wheel product in each particle synchronous consumption of use process,
Improve the stability in use of grinding wheel.Coarse sand material is 20-25 DEG C, humidity in temperature T1To be parked under conditions of 60-70, can make
Coarse sand material keeps stablizing while stable accumulation density, reduces phenolic resin and other powders with the variation width of temperature, humidity
Degree stablizes coarse sand material property.
Be further arranged to: the glass fiber mesh is phenolic resin modified glass fiber mesh.
Be further arranged to: the phenolic resin content w in the glass fiber mesh is 33-35%.
By using above-mentioned technical proposal, glass fiber mesh is modified using phenolic resin, the phenol in glass fiber mesh
On the one hand urea formaldehyde can carry out cross-linking and curing reaction with the phenol-formaldehyde resin powder in molding mass, improve glass fiber mesh and molding mass
Between adhesion strength.In addition, reducing by phenolic resin modified glass fiber mesh brittleness, toughness increases, heat resistance is more preferable,
To when as enhancing base-material, hence it is evident that improve the bending strength and heat resistance of grinding wheel.
Be further arranged to: in the B2 step, the pressure P of extrusion forming is 170-190bar, and forming temperature T2 is 40-
50 DEG C, dwell time t2 is 79-81s.
Be further arranged to: in the step S3, drying temperature T3 is 65-185 DEG C, drying time 26h.
By using above-mentioned technical proposal, forming grinding wheel, the material of forming grinding wheel are obtained by extrusion forming in B2 step
Between powerful cohesive force generated due to high pressure pressing, so that stablizing forming grinding wheel keeps blank shape.In step B3, molding
Grinding wheel dries 26h under the conditions of temperature T2 is 65-185 DEG C, the steam in drying forming grinding wheel, and promotes the phenol in forming grinding wheel
Urea formaldehyde bonding agent crosslinking curing improves Wheel hardness and grinding performance.
In conclusion advantageous effects of the invention are as follows:
(1) hardness, toughness, heat resistance and the grindability of grinding wheel are enhanced as abrasive material using single alundum, fused alumina zirconia and silicon carbide
Energy；Abrasive material is carried out secure bond as bonding agent by thermoplastic phenolic resin powder and thermosetting phenolic resin liquid, and it is crisp to reduce grinding wheel
Property, improve grinding wheel toughness and structural strength；Supporting material of the potassium sulfate as grinding wheel improves wheel strength self-sharpening and cutting effect
Rate, to extend the service life of grinding wheel；
(2) troilite powder is added in formula, oxidation reaction occurs between 450-475 DEG C for a part of troilite powder, consumes
Oxygen in air extends grinding wheel high temperature operating life to reduce the oxidation to resin and the oxidation burn to workpiece；One
Point troilite powder is decomposed reactive absorption heat at 650 DEG C or so, to reduce wheel grinding temperature；Some sulphur
Iron ore powder enters molten condition at 1100 DEG C or so, becomes good lubricant, protects grinding wheel；During wheel grinding, respectively
Sulphur, sulfur dioxide, sulfur trioxide and the workpiece surface that a reaction generates react, and generate FexSY, form protective layer and conduct
Lubricant plays the role of lubrication protection to wheel face, utilizes difference of troilite during stone at different temperatures
Reaction, plays oxidation protection, cooling protection and lubrication protection to grinding wheel；
(3) three layers of molding mass point is laid in molding die, and phenolic resin modified glass fibers are placed between adjacent two layers molding mass
Net is tieed up, glass fiber mesh improves the structural strength of grinding wheel, and the phenolic aldehyde in glass fiber mesh as the enhancing base-material of resin wheel
Resin carries out cross-linking and curing reaction with the phenol-formaldehyde resin powder in molding mass in forming process, improves glass fiber mesh and molding mass
Between adhesion strength；In addition, reducing by phenolic resin modified glass fiber mesh brittleness, toughness increases, heat resistance is more preferable,
To when as enhancing base-material, hence it is evident that improve the bending strength and heat resistance of grinding wheel.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of medium plain emery wheel and molding die of the present invention.
Appended drawing reference: 1, molding die；2, finished product grinding wheel；3, molding mass；4, glass fiber mesh；5, the trade mark scraps of paper；6, sand
Take turns washer.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment 1: a kind of resin wheel for rail cutting, recipe ingredient and its content (1 parts by weight as shown in table 1
Number=5kg).Wherein phenol-formaldehyde resin powder is thermoplastic phenolic resin, and liquid phenolic resin is thermosetting phenolic resin.The one kind is used for
The preparation method of the resin wheel of rail cutting includes mixing procedure and moulding process, mixing procedure the following steps are included:
A1. it is blended premix: by formula ratio feeding, single alundum 24#, fused alumina zirconia 24# and silicon carbide 24# being mixed simultaneously
It is formed uniformly abrasive material, liquid phenolic resin is added into abrasive material, is uniformly mixed and forms premix；
A2. be blended coarse sand material: potassium sulfate, high-purity troilite powder and phenol-formaldehyde resin powder are mixed evenly to form mixed powder
Material, compound powder is mixed with premix obtained in A1 step, is uniformly mixed and is formed coarse sand material；
A3. coarse sand material screen material: first passing through 12 mesh screens for coarse sand material obtained in A2 step and carry out the first sieve and expect, removal dough,
Expect block after by coarse sand material temperature T1 be 20 DEG C, humidityIt is parked under conditions of being 60, storage period t1 is 2h, using 14 mesh
Sieve carries out second sieve material removal dough, material block, finally obtains molding mass；
Moulding process the following steps are included:
B1. molding mass is laid with: taking three layers of molding mass obtained in step A3 point to be laid in molding die, and adjacent two layers one-tenth
The modified glass fiber mesh of liquid phenolic resin submergence is placed through between moulding mixture, the content w of phenolic resin in glass fiber mesh
It is 33%；
B2. it is press-formed: being laid with molding molding mass surface in step bl is determined and be laid with the trade mark scraps of paper, then on top layer molding mass surface
Grinding wheel washer is placed at center, and then extrusion forming obtains forming grinding wheel, and briquetting pressure P is 170bar, and forming temperature T2 is 40 DEG C,
Dwell time t2 is 79.0s, and the cross-sectional view of molding die and finished product grinding wheel is as shown in Figure 1；
B3. drying hardening: molding obtained in step B2 is carried out to be dried to forming grinding wheel hardening, finished product grinding wheel is obtained, dries
Temperature T3 and time are as shown in table 2.
Embodiment 2: it is a kind of for rail cutting resin wheel, the present embodiment the difference from embodiment 1 is that, formula group
Point content is different, the technological parameter in preparation method is different.The formula concrete component content of the present embodiment is as shown in table 1, prepares
Technological parameter in method is as shown in table 3.
Embodiment 3: it is a kind of for rail cutting resin wheel, the present embodiment the difference from embodiment 1 is that, formula group
Point content is different, the technological parameter in preparation method is different.The formula concrete component content of the present embodiment is as shown in table 1, prepares
Technological parameter in method is as shown in table 3.
Embodiment 4: it is a kind of for rail cutting resin wheel, the present embodiment the difference from embodiment 1 is that, formula group
Point content is different, the technological parameter in preparation method is different.The formula concrete component content of the present embodiment is as shown in table 1, prepares
Technological parameter in method is as shown in table 3.
Embodiment 5: it is a kind of for rail cutting resin wheel, the present embodiment the difference from embodiment 1 is that, formula group
Point content is different, the technological parameter in preparation method is different.The formula concrete component content of the present embodiment is as shown in table 1, prepares
Technological parameter in method is as shown in table 3.
1 embodiment 1-5 each component content table (1 parts by weight=5kg) of table
2 forming grinding wheel drying temperature of table and timetable
The process parameter table of 3 embodiment 1-5 of table
Comparative example 1: this comparative example the difference from embodiment 1 is that, in formula do not contain single alundum.
Comparative example 2: this comparative example the difference from embodiment 1 is that, in formula do not contain fused alumina zirconia.
Comparative example 3: this comparative example the difference from embodiment 1 is that, in formula do not contain silicon carbide.
Comparative example 4: this comparative example the difference from example 2 is that, in formula do not contain potassium sulfate.
Comparative example 5: the difference of this comparative example and embodiment 3 is, phenol-formaldehyde resin powder and liquid phenolic resin in bonding agent
It is thermoplastic phenolic resin.
Comparative example 6: the difference of this comparative example and embodiment 3 is, phenol-formaldehyde resin powder and liquid phenolic resin in bonding agent
It is thermosetting phenolic resin.
Comparative example 7: the difference of this comparative example and embodiment 4 is, in A3 step, coarse sand material without parking, directly into
Row twice expect by sieve.
Comparative example 8: the difference of this comparative example and embodiment 5 is that glass fiber mesh is without phenolic resin modified.
Performance test:
(1) the finished sand wheel in turning test Example 1-5, comparative example 1-9 is as test sample, using GB/T2493-
1995 " the turning test methods of grinding wheel " carry out turning test to test sample, carry out test sample with the speed of 7000rpm
Turning test, record grinding wheel start time t when rupture, and test result is as shown in table 4.
4 embodiment 1-5 of table, comparative example 1-9 turning test tables of data
(2) grinding performance test is using high speed abrasive wheel cutting machine SQ-40-1 to obtaining in embodiment 1-5 and comparative example 1-9
Finished product grinding wheel to diameter be 50mm filled circles steel workpiece cut, with grinding ratio characterize grinding performance.It observes and records every
The scorch situation of a emery wheel cuts solid round steel when being ground, with " slight ", " relatively light ", " heavier ", " severe " four grades
To indicate the burn degree of solid round steel.Wherein, " slight " expression burn surface area accounts for total area ratio η≤5%, and " relatively light " indicates
5% < η≤20%, 20% < η≤50% of heavier expression, severe indicate η > 50%.Specific cutting grinding condition, grinding ratio and
Burn degree is as shown in table 5.
The grinding performance tables of data of 5 embodiment 1-5 of table, comparative example 1-8.
It the implementation principle of the present embodiment and has the beneficial effect that using single alundum, fused alumina zirconia and silicon carbide as abrasive material, enhancing
Hardness, toughness, heat resistance and the grinding performance of grinding wheel；Using thermoplastic phenolic resin powder and thermosetting phenolic resin liquid as combining
Abrasive material is carried out secure bond by agent, is reduced grinding wheel brittleness, is improved grinding wheel toughness and structural strength；Reinforcement of the potassium sulfate as grinding wheel
Material improves wheel strength self-sharpening and cutting efficiency, to extend the service life of grinding wheel.Troilite is added in formula simultaneously
Powder plays oxidation to grinding wheel, cutting workpiece using differential responses of troilite during stone at different temperatures
Protection, cooling protection and lubrication protection.Phenolic resin modified glass fiber mesh is added in the abrasive wheel forming stage, hence it is evident that improve grinding wheel
Bending strength and heat resistance, obtain excellent combination property, resin wheel suitable for cutting rail.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of resin wheel for rail cutting, which is characterized in that the component including following parts by weight:
7-9 parts of single alundum；
7-9 parts of fused alumina zirconia；
3.8-4.2 parts of silicon carbide；
2.8-3.2 parts of bonding agent；
0.8-1.2 parts of potassium sulfate；
Wherein bonding agent includes phenol-formaldehyde resin powder and liquid phenolic resin, and the weight fraction ratio of phenol-formaldehyde resin powder and liquid phenolic resin is
2:1-3:1。
2. the resin wheel according to claim 1 for rail cutting, it is characterised in that: further include 1.8-2.2 parts
High-purity troilite powder.
3. the resin wheel according to claim 1 or 2 for rail cutting, it is characterised in that: the phenol-formaldehyde resin powder
For thermoplastic phenolic resin, the liquid phenolic resin is thermosetting phenolic resin.
4. a kind of preparation method of the resin wheel for rail cutting as described in claim 1-3, which is characterized in that including
Mixing procedure and moulding process, the mixing procedure the following steps are included:
A1. be blended premix: single alundum, fused alumina zirconia, silicon carbide are mixed evenly to form abrasive material, and phenolic aldehyde is added into abrasive material
Resin liquid is uniformly mixed and forms premix；
A2. be blended coarse sand material: potassium sulfate, high-purity troilite powder and phenol-formaldehyde resin powder are mixed evenly to form mixed powder
Material, compound powder is mixed with premix obtained in A1 step, is uniformly mixed and is formed coarse sand material；
A3. coarse sand material screen material: successively passing through 12 mesh for coarse sand material obtained in A2 step and 14 mesh screens carry out sieve material, finally
To molding mass；
The moulding process the following steps are included:
B1. molding mass is laid with: taking three layers of molding mass obtained in step A3 point to be laid in molding die, and adjacent two layers one-tenth
Glass fiber mesh is placed between moulding mixture；
B2. it is press-formed: being laid with molding molding mass surface in step bl is determined and be laid with the trade mark scraps of paper, then in molding mass centre of surface
Grinding wheel washer is placed, then half hot-forming obtains forming grinding wheel；
B3. drying hardening: forming grinding wheel obtained in step B2 is dried to forming grinding wheel hardening, obtains finished product grinding wheel.
5. the preparation method of the resin wheel according to claim 4 for rail cutting, it is characterised in that: the A3 step
In rapid, coarse sand material is parked under the conditions of temperature T1 is 20-25 DEG C, humidity φ is 60-70 by the sieving materials after 12 mesh screens,
Storage period t1 is 2-24h, then carries out 14 mesh mesh screen material.
6. the preparation method of the resin wheel according to claim 4 for rail cutting, it is characterised in that: the glass
Web is phenolic resin modified glass fiber mesh.
7. the preparation method of the resin wheel according to claim 6 for rail cutting, it is characterised in that: the glass
Phenolic resin content w in web is 33-35%.
8. the preparation method of the resin wheel according to claim 4 for rail cutting, it is characterised in that: the B2 step
In rapid, the pressure P of extrusion forming is 170-190bar, and forming temperature T2 is 40-50 DEG C, and dwell time t2 is 79-81s.
9. the preparation method of the resin wheel according to claim 4 for rail cutting, it is characterised in that: the step
In B3, drying temperature T3 is 65-185 DEG C, drying time 26h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812305.5A CN110497326A (en) | 2019-08-29 | 2019-08-29 | A kind of resin wheel and preparation method thereof for rail cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812305.5A CN110497326A (en) | 2019-08-29 | 2019-08-29 | A kind of resin wheel and preparation method thereof for rail cutting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111941292A (en) * | 2020-08-17 | 2020-11-17 | 中山德立洁具有限公司 | Grinding wheel for grinding and preparation process thereof |
| CN113649957A (en) * | 2021-08-13 | 2021-11-16 | 广州砺风新材料科技有限公司 | Steel rail cutting grinding wheel and preparation method thereof |
| CN114083449A (en) * | 2021-11-23 | 2022-02-25 | 廊坊盛森磨具有限公司 | Resin grinding wheel for cutting and disassembling reinforced concrete and preparation method and application thereof |
| CN114367926A (en) * | 2022-01-06 | 2022-04-19 | 沈阳一蒙砂轮有限公司 | Special fiber reinforced resin abrasive cutting wheel for cutting railway steel rail and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111941292A (en) * | 2020-08-17 | 2020-11-17 | 中山德立洁具有限公司 | Grinding wheel for grinding and preparation process thereof |
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| CN113649957A (en) * | 2021-08-13 | 2021-11-16 | 广州砺风新材料科技有限公司 | Steel rail cutting grinding wheel and preparation method thereof |
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| CN114083449A (en) * | 2021-11-23 | 2022-02-25 | 廊坊盛森磨具有限公司 | Resin grinding wheel for cutting and disassembling reinforced concrete and preparation method and application thereof |
| CN114367926A (en) * | 2022-01-06 | 2022-04-19 | 沈阳一蒙砂轮有限公司 | Special fiber reinforced resin abrasive cutting wheel for cutting railway steel rail and manufacturing method thereof |
| CN114367926B (en) * | 2022-01-06 | 2022-11-11 | 沈阳一蒙砂轮有限公司 | Special fiber reinforced resin abrasive cutting wheel for cutting railway steel rail and manufacturing method thereof |
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