CN101683724B - High-strength dry-type steel rail resin cutting grinding wheel and preparation method thereof - Google Patents
High-strength dry-type steel rail resin cutting grinding wheel and preparation method thereof Download PDFInfo
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- CN101683724B CN101683724B CN2008101677659A CN200810167765A CN101683724B CN 101683724 B CN101683724 B CN 101683724B CN 2008101677659 A CN2008101677659 A CN 2008101677659A CN 200810167765 A CN200810167765 A CN 200810167765A CN 101683724 B CN101683724 B CN 101683724B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 67
- 229920005989 resin Polymers 0.000 title claims abstract description 32
- 239000011347 resin Substances 0.000 title claims abstract description 32
- 238000000227 grinding Methods 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 title abstract description 5
- 239000010959 steel Substances 0.000 title abstract description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 48
- 239000003365 glass fiber Substances 0.000 claims abstract description 48
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 39
- 239000010431 corundum Substances 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 30
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 26
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- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000007667 floating Methods 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 73
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 37
- 238000000465 moulding Methods 0.000 claims description 26
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 18
- 229910000077 silane Inorganic materials 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- 208000034189 Sclerosis Diseases 0.000 claims description 14
- 239000011049 pearl Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
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- 230000008569 process Effects 0.000 claims description 7
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- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract 1
- 239000011324 bead Substances 0.000 abstract 1
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Abstract
The invention discloses a metal abrasive cutting wheel, in particular to a high-strength dry-type steel rail resin abrasive cutting wheel, which comprises a metal ring for central positioningAnd the cutting grinding wheel is characterized by comprising an upper glass fiber mesh, a forming material layer and a lower glass fiber mesh which are uniformly distributed in the middle, wherein the upper glass fiber mesh and the lower glass fiber mesh are both 320g/m2～420g/m2The forming material layer comprises mixed abrasive, phenolic resin, floating beads, calcium carbonate and carbon black, and the mixed abrasive is formed by mixing brown corundum and white corundum. The invention also discloses a preparation method of the grinding wheel. The high-strength dry-type railway steel rail resin cutting grinding wheel has the advantages of good impact resistance, high safety speed, high cutting speed, good heat dissipation and the like.
Description
Technical field
The present invention relates to a kind of Metal Cutting grinding wheel, particularly a kind of high-strength dry-type rail resin abrasive cutting wheel is suitable for high rigidity, the cutting of the railway steel rider of high tenacity.The invention still further relates to the preparation method of this abrasive cut-off wheel.
Background technology
The HIgh strength drying railway track resin abrasive cutting wheel of Chinese Railway engineering use at present mainly is to rely on some developed country's imports such as the Europe and the U.S., the one, and the cost of import is high, and the 2nd, by external long-term monopolization of some manufacturers.Along with fast development of Chinese economy, railway traffic is being brought into play more and more important effect, the speed raising of train, and the construction of intercity fast iron, to the rail abrasive cut-off wheel, consumption is also increasing.Existing homemade Metal Cutting grinding wheel general thickness is thick at 3.2～3.5mm, and the highest use linear velocity is at 72～80m/s, and high rigidity is amassed in the cutting heavy in section; During the railway track of high tenacity, exist impact resistance poor, safe speed is low. and emery wheel is prone to break; (the rail section moment generation high temperature of cutting is more than 800 ℃, and the carbonization in the time of 350 ℃ of the heatproof temperature of the phenolic resins of bonding abrasive material loses adhesive property) cut not sharp; Poor radiation; Cutting section to rail causes burn. and in the cutting process, dust splashes everywhere, causes cutting section to adhere to dust; The cross section welding of cutting back is insecure. and the severe contamination working environment. grinding wheel diameter consumption is big, and a mouth that has all can't cut will change emery wheel again.Inefficiency, waste is big.Especially when rushing to repair railway fast, limited time does not more allow the frequent change of emery wheel to waste time.
Summary of the invention
The technical problem that the present invention will solve provides a kind of dry type railway track resin abrasive cutting wheel, and this abrasive cut-off wheel shock resistance is good, and emery wheel is difficult for breaking; Safe speed is high, and cutting speed is fast, and thermal diffusivity is good; Cutting section to rail does not have burn, and dust is little during cutting, and cutting section does not adhere to dust; Cross section, cutting back firm welding, little to the working environment pollution, and improve 4～5 times than present homemade Metal Cutting grinding wheel service life.
HIgh strength drying railway track resin abrasive cutting wheel of the present invention comprises that centralized positioning is with becket and cutting grinding wheel two parts; Said cutting grinding wheel comprises upper strata glass fiber mesh sheet, the middle equally distributed moulding bed of material and lower floor's glass fiber mesh sheet, and said upper strata glass fiber mesh sheet and lower floor's glass fiber mesh sheet all adopt 320g/m
2～420g/m
2Alkali-free glass fibre net sheet, the said moulding bed of material comprise compound abrasive, phenolic resins, float pearl, calcium carbonate and carbon black, and said compound abrasive is mixed by brown corundum and white fused alumina and forms.
Said becket can be that any metal with certain intensity is processed, for example the steel becket.
Wherein, in weight portion, the said moulding bed of material comprises:
The compound abrasive 70～80 of palm fibre corundum and white fused alumina
Phenolic resins 11～17
Float pearl 5～10
Calcium carbonate 1～3
Carbon black 0.2～0.3
Wherein, the mixed proportion of above-mentioned compound abrasive palm fibre corundum and white fused alumina is in weight ratio, and brown corundum: white fused alumina is 70:30～40:60, preferred proportion consumption 50:50.
In addition, preferred, above-mentioned compound abrasive surface evenly is coated with the KH550 silane coupler, and usage ratio is in weight ratio, compound abrasive: silane coupler=100: 0.3.Carry out special processed, earlier that the compound abrasive washing is clean, oven dry.Then compound abrasive is put into the batch mixing pot, add the KH550 silane coupler again, (part by weight, compound abrasive: silane coupler=100: 0.3) stir and let coupling agent be coated in the compound abrasive surface uniformly.Make it bonding firmly.
The phenolic resins that said phenolic resins can select for use industry technical staff to know, promptly phenol and formaldehyde are through the synthetic resin of polycondensation reaction generation, and consumption is preferably 17 weight portions.
It is a kind of fly ash hollow ball that can bubble through the water column that said novel high-temperature resistant nano material floats pearl, is canescence, and density is 720kg/m
3(heavy); About 0.1 millimeter of particle diameter; Surface sealing and smooth; Thermal conductivity is little, refractoriness>=1610 ℃, and the chemical analysis that floats pearl is main with silica and alundum (Al; Multiple function such as have that particle is thin, hollow, light weight, high-strength, wear-resisting, high temperature resistant, insulation insulation, insulation are fire-retardant can be used for insulation, fireproof paint, wood plastic product (Dai Mu, imitative wood), polymer, sicker, putty, fiberglass, electrically insulating material, composite, refractory material, insulation material, construction material, just is being widely used in industry such as space flight, navigation, automobile at present.Consumption is preferably 7 weight portions.
Said calcium carbonate preferable amount is 3 weight portions.
Said carbon black preferable amount is 0.3 weight portion.
Above material is processed external diameter (D) 300mm～500mm thickness (T) 3.8mm～4.5mm, aperture (H) 20mm～32mm, density 2.25g/cm after processing
2～2.35g/cm
2The resin abrasive cutting wheel sheet promptly get HIgh strength drying railway track resin abrasive cutting wheel sheet of the present invention.
HIgh strength drying railway track resin abrasive cutting wheel sheet of the present invention can be through being prepared as follows the method preparation, and step comprises:
1) compound abrasive, the phenolic resins that will form by brown corundum and white fused alumina, floats pearl, calcium carbonate, carbon black and in batch mixer, stir;
2) sieve step 1) gained compound is placed 4～6 hours in environment temperature is 20～25 ℃ magazine after and promptly get molding mass;
3) in mould, put into said lower floor glass fiber mesh sheet; Molding mass is put into die cavity to be shakeout; Put into upper strata glass fiber mesh sheet, location becket again, build cope match-plate pattern and push and impose 18～20Kpa pressure pressurize 3-5 in the forcing press after second, unload extruding dies and promptly get molded blank;
4) molded blank is put into hardening furnace sclerosis, 170 ℃～190 ℃ of the highest hardening temperatures, firm time 14～20 hours;
5) be cooled to normal temperature.
Use this method to prepare the present invention, each material proportion as previously mentioned, the raw meal particle size of selecting for use is respectively: the compound abrasive granularity of brown corundum and white fused alumina is 24～30 orders; The phenolic resins granularity is 180～200 orders; The granularity of floating pearl is 280～325 orders; The granularity of calcium carbonate is 280～325 orders; The granularity of carbon black is 280～325 orders.
Preferably, in the said step 4) hardening process, hardening temperature slowly was warming up to the highest hardening temperature through 10 hours from 60 ℃, kept this highest hardening temperature slowly to reduce to room temperature after 6 hours more then.Preferred 180 ℃ of the highest said hardening temperature.
In addition, in the preparation process of HIgh strength drying railway track resin abrasive cutting wheel of the present invention, also can add the compound abrasive treatment step in said step 1) front, be specially: earlier that the compound abrasive washing is clean, oven dry; Then compound abrasive is put into the batch mixing pot, add the KH550 silane coupler again, stir and let coupling agent be coated in the compound abrasive surface uniformly, wherein, in weight ratio, compound abrasive: silane coupler=100: 0.3.
The present invention is than the traditional metal abrasive cut-off wheel, and the inventor has carried out creationary replacement or improvement through research and a large amount of experiments to traditional material and technology, mainly contains:
The improvement of net sheet: change tradition and use 190g～260g/m
2Medium-alkali glass fibre net sheet is done the supporting material of emery wheel, and adopts 320g/m
2～420g/m
2The reinforcement of high strength alkali-free glass fibre net sheet; Thereby with the highest original operating speed 80m/s, bring up to present operating speed 100m/s, can fully guarantee emery wheel safe, not broken in cutting;
The improvement of abrasive material: change traditional single variety brown corundum abrasive, and adopt brown corundum (A) and white fused alumina (WA) compound abrasive, and carried out special processed, be coated with on the abrasive material top layer and attach chemical material, make it bonding firmly, self-sharpening is good;
The improvement of auxiliary compound: change traditional iron sulfide, ice crystal, auxiliary compound material such as gypsum.And adopting a kind of novel high-temperature resistant nano material to float pearl one by one, the heat resistance that can improve emery wheel can improve cutting speed again, reduce the burn to rail.
HIgh strength drying railway track resin abrasive cutting wheel sheet of the present invention has the following advantages:
1, impact resistance is good, safe speed is high, use speed 100m/s safely, emery wheel is difficult for breaking, and exceeds 20～30m/s than existing emery wheel operating speed;
2, cutting speed is fast, thermal diffusivity good, the cutting section of rail is not had the burn non-oxidation, and the every cutter required time of the rail that existing abrasive cutting-off is 60 kilograms/meter 5～8 minutes has only 2～3 minutes and abrasive cut-off wheel of the present invention cuts the required time of every cutter;
Dust is little when 3, cutting, cutting section does not adhere to dust, cut cross section, back firm welding, and is little to the working environment pollution simultaneously, guarantees staff's physical and mental health;
4, improve 4～5 times than at present homemade existing abrasive cut-off wheel service life; With fixed support portable gasoline cutting machine is fixed on the 60kg/m rail; Carry out campaign-styled cutting, cut 6 cuttves after, last diameter 320 millimeter of emery wheel; Greatly reduce production cost, reduced the number of times of changing grinding wheel.Shortened the time of railway recovery.And existing emery wheel can only cut a cutter, even a cutter all can't cut, and what the diameter of emery wheel just consumed can not cut;
5, manufacturing process is simple, and is easy to operate.With short production cycle.
Fig. 1 HIgh strength drying railway track of the present invention resin abrasive cutting wheel front view;
Description of drawings
Fig. 2 cutting grinding wheel profile of the present invention;
Fig. 3 preparation method's hardening temperature of the present invention curve map.
Followingly HIgh strength drying railway track resin abrasive cutting wheel of the present invention is described with reference to accompanying drawing; As depicted in figs. 1 and 2; HIgh strength drying railway track resin abrasive cutting wheel of the present invention comprises that centralized positioning is with becket 2 and cutting grinding wheel 1 two parts; Wherein, The structure of said cutting grinding wheel is divided into three layers, comprises upper strata glass fiber mesh sheet 3, the middle equally distributed moulding bed of material 4 and lower floor's glass fiber mesh sheet 3 ', and said upper strata glass fiber mesh sheet 3 adopts 320g/m with lower floor's glass fiber mesh sheet 3 '
2～420g/m
2Alkali-free glass fibre net sheet.
The specific embodiment:
Wherein, The moulding bed of material 4 shown in Fig. 2 can comprise different composition proportion; All can realize the present invention, provide one group of preparation method's of HIgh strength drying railway track resin abrasive cutting wheel of the present invention embodiment below, following examples only are used to the present invention is described but the invention is not restricted to this.
Embodiment 1, adopts following raw material:
The compound abrasive of palm fibre corundum and white fused alumina, granularity 24～30 orders, mixed proportion palm fibre corundum: white fused alumina=70:30, consumption 70 weight portions; Granularity 180～200 purpose phenolic resins, consumption 11 weight portions; The novel high-temperature resistant nano material of granularity 200～250 purposes floats pearl, consumption 5 weight portions; Granularity 280～325 purpose calcium carbonate, consumption 1 weight portion; Granularity 280～325 purpose carbon blacks, consumption 0.2 weight portion; The alkali-free glass fibre net sheet aperture 5X4 order that adopts, grammes per square metre 320g/m
2
Above material, adopt following steps to prepare high-strength dry-type rail abrasive cut-off wheel of the present invention:
1) compound abrasive, the phenolic resins that will form by brown corundum and white fused alumina, floats pearl, calcium carbonate, carbon black and in batch mixer, stir;
2) sieve step 1) gained compound is placed 4～6 hours in environment temperature is 20～25 ℃ magazine after and promptly get molding mass;
3) in mould, put into said lower floor glass fiber mesh sheet; Molding mass is put into die cavity to be shakeout; Put into upper strata glass fiber mesh sheet, location becket again, build cope match-plate pattern and push and impose 18～20Kpa pressure pressurize 3-5 in the forcing press after second, unload extruding dies and promptly get molded blank;
4) molded blank is put into hardening furnace sclerosis, 190 ℃ of the highest hardening temperatures, firm time 16 hours;
5) be cooled to normal temperature.
Through being processed into thickness is 3.8mm, density 2.25g/cm
2HIgh strength drying railway track resin abrasive cutting wheel sheet.
In hardening process, hardening temperature slowly heats up since 60 ℃, is heated to 190 ℃ gradually through 10 hours, keeps this temperature sclerosis to reduce to gradually in 6 hours then coming out of the stove after the room temperature getting product.
The compound abrasive of palm fibre corundum and white fused alumina, granularity 24～30 orders, mixed proportion palm fibre corundum: white fused alumina=50:50, consumption 80 weight portions; Granularity 180～200 purpose phenolic resins, consumption 17 weight portions; The novel high-temperature resistant nano material of granularity 200～250 purposes floats pearl, consumption 10 weight portions; Granularity 280～325 purpose calcium carbonate, consumption 3 weight portions; Granularity 280～325 purpose carbon blacks, consumption 0.3 weight portion; The alkali-free glass fibre net sheet aperture 5X4 order that adopts, grammes per square metre 420g/m
2
Above material, adopt following steps to prepare high-strength dry-type rail abrasive cut-off wheel of the present invention:
1) earlier that the compound abrasive washing is clean, oven dry; Then compound abrasive is put into the batch mixing pot, add the KH550 silane coupler again, stir and let coupling agent be coated in the compound abrasive surface uniformly, in weight ratio, compound abrasive: silane coupler=100:0.3;
2) compound abrasive, the phenolic resins that will form by brown corundum and white fused alumina, float pearl, calcium carbonate, carbon black and in batch mixer, stir;
3) sieve step 1) gained compound is placed 4～6 hours in environment temperature is 20～25 ℃ magazine after and promptly get molding mass;
4) in mould, put into said lower floor glass fiber mesh sheet; Molding mass is put into die cavity to be shakeout; Put into upper strata glass fiber mesh sheet, location becket again, build cope match-plate pattern and push and impose 18～20Kpa pressure pressurize 3-5 in the forcing press after second, unload extruding dies and promptly get molded blank;
5) molded blank is put into hardening furnace sclerosis, 180 ℃ of the highest hardening temperatures, firm time 16 hours;
6) be cooled to normal temperature.
Above material is 4.5mm through being processed into thickness, density 2.35g/cm
2HIgh strength drying railway track resin abrasive cutting wheel sheet.
In the hardening process, hardening temperature slowly heats up since 60 ℃, evenly is heated to 180 ℃ through 10 hours, keeps 180 ℃ of sclerosis evenly to reduce to room temperature after 6 hours then and comes out of the stove and get product.(hardening curve is as shown in Figure 3)
The compound abrasive of palm fibre corundum and white fused alumina, granularity 24～30 orders, mixed proportion palm fibre corundum: white fused alumina=40:60, consumption 80 weight portions; Granularity 180～200 purpose phenolic resins, consumption 17 weight portions; The novel high-temperature resistant nano material of granularity 200～250 purposes floats pearl, consumption 8 weight portions; Granularity 280～325 purpose calcium carbonate, consumption 3 weight portions; Granularity 280～325 purpose carbon blacks, consumption 0.3 weight portion; The alkali-free glass fibre net sheet aperture 5X4 order that adopts, grammes per square metre 420g/m
2
Above material, adopt following steps to prepare high-strength dry-type rail abrasive cut-off wheel of the present invention:
1) compound abrasive, the phenolic resins that will form by brown corundum and white fused alumina, floats pearl, calcium carbonate, carbon black and in batch mixer, stir;
2) sieve step 1) gained compound is placed 4～6 hours in environment temperature is 20～25 ℃ magazine after and promptly get molding mass;
3) in mould, put into said lower floor glass fiber mesh sheet; Molding mass is put into die cavity to be shakeout; Put into upper strata glass fiber mesh sheet, location becket again, build cope match-plate pattern and push and impose 18～20Kpa pressure pressurize 3-5 in the forcing press after second, unload extruding dies and promptly get molded blank;
4) molded blank is put into hardening furnace sclerosis, 180 ℃ of the highest hardening temperatures, firm time 16 hours;
5) be cooled to normal temperature.
Above material, adopting step 4 is 4.0mm through being processed into thickness, density 2.30g/cm
2HIgh strength drying railway track resin abrasive cutting wheel sheet.
In the hardening process, hardening temperature slowly heats up since 60 ℃, evenly is heated to 180 ℃ through 10 hours, keeps 180 ℃ of sclerosis evenly to reduce to room temperature after 6 hours then and comes out of the stove and get product.
Embodiment 4, adopt following raw material:
The compound abrasive of palm fibre corundum and white fused alumina, granularity 24～30 orders, mixed proportion palm fibre corundum: white fused alumina=50:50, consumption 80 weight portions; Granularity 180～200 purpose phenolic resins, consumption 17 weight portions; The novel high-temperature resistant nano material of granularity 200～250 purposes floats pearl, consumption 10 weight portions; Granularity 280～325 purpose calcium carbonate, consumption 3 weight portions; Granularity 280～325 purpose carbon blacks, consumption 0.2 weight portion; The alkali-free glass fibre net sheet aperture 5X4 order that adopts, grammes per square metre 320g/m
2
Above material, adopt following steps to prepare high-strength dry-type rail abrasive cut-off wheel of the present invention:
1) earlier that the compound abrasive washing is clean, oven dry; Then compound abrasive is put into the batch mixing pot, add the KH550 silane coupler again, stir and let coupling agent be coated in the compound abrasive surface uniformly, in weight ratio, compound abrasive: silane coupler=100:0.3;
2) compound abrasive, the phenolic resins that will form by brown corundum and white fused alumina, float pearl, calcium carbonate, carbon black and in batch mixer, stir;
3) sieve step 1) gained compound is placed 4～6 hours in environment temperature is 20～25 ℃ magazine after and promptly get molding mass;
4) in mould, put into said lower floor glass fiber mesh sheet; Molding mass is put into die cavity to be shakeout; Put into upper strata glass fiber mesh sheet, location becket again, build cope match-plate pattern and push and impose 18～20Kpa pressure pressurize 3-5 in the forcing press after second, unload extruding dies and promptly get molded blank;
5) molded blank is put into hardening furnace sclerosis, 190 ℃ of the highest hardening temperatures, firm time 16 hours;
6) be cooled to normal temperature.
Above material is 3.8mm through being processed into thickness, density 2.25g/cm
2HIgh strength drying railway track resin abrasive cutting wheel sheet.
Hardening temperature slowly heats up since 60 ℃, is heated to 190 ℃ gradually through 10 hours, both keep this temperature sclerosis to reduce to gradually in 6 hours then coming out of the stove after the room temperature finished product
Embodiment 5 adopts following raw material:
The compound abrasive of palm fibre corundum and white fused alumina, granularity 24～30 orders, mixed proportion palm fibre corundum: white fused alumina=60:40, consumption 80 weight portions; Granularity 180～200 purpose phenolic resins, consumption 17 weight portions; The novel high-temperature resistant nano material of granularity 200～250 purposes floats pearl, consumption 7 weight portions; Granularity 280～325 purpose calcium carbonate, consumption 3 weight portions; Granularity 280～325 purpose carbon blacks, consumption 0.3 weight portion; The alkali-free glass fibre net sheet aperture 5X4 order that adopts, grammes per square metre 420g/m
2
Above material, adopt following steps to prepare high-strength dry-type rail abrasive cut-off wheel of the present invention:
1) earlier that the compound abrasive washing is clean, oven dry; Then compound abrasive is put into the batch mixing pot, add the KH550 silane coupler again, stir and let coupling agent be coated in the compound abrasive surface uniformly, in weight ratio, compound abrasive: silane coupler=100:0.3;
2) compound abrasive, the phenolic resins that will form by brown corundum and white fused alumina, float pearl, calcium carbonate, carbon black and in batch mixer, stir;
3) sieve step 1) gained compound is placed 4～6 hours in environment temperature is 20～25 ℃ magazine after and promptly get molding mass;
4) in mould, put into said lower floor glass fiber mesh sheet; Molding mass is put into die cavity to be shakeout; Put into upper strata glass fiber mesh sheet, location becket again, build cope match-plate pattern and push and impose 18～20Kpa pressure pressurize 3-5 in the forcing press after second, unload extruding dies and promptly get molded blank;
5) molded blank is put into hardening furnace sclerosis, 180 ℃ of the highest hardening temperatures, firm time 16 hours;
6) be cooled to normal temperature.
Above material is 4.5mm through being processed into thickness, density 2.30g/cm
2HIgh strength drying railway track resin abrasive cutting wheel sheet.
In the hardening process, hardening temperature slowly heats up since 60 ℃, evenly is heated to 180 ℃ through 10 hours, keeps 180 ℃ of sclerosis evenly to reduce to room temperature after 6 hours then and comes out of the stove and get product.
Embodiment 6, adopt following raw material:
The compound abrasive of palm fibre corundum and white fused alumina, granularity 24～30 orders, mixed proportion palm fibre corundum: white fused alumina=50:50, consumption 70 weight portions; Granularity 180～200 purpose phenolic resins, consumption 11 weight portions; The novel high-temperature resistant nano material of granularity 200～250 purposes floats pearl, consumption 5 weight portions; Granularity 280～325 purpose calcium carbonate, consumption 1 weight portion; Granularity 280～325 purpose carbon blacks, consumption 0.2 weight portion; The alkali-free glass fibre net sheet aperture 5X4 order that adopts, grammes per square metre 320g/m
2
Above material, adopt following steps to prepare high-strength dry-type rail abrasive cut-off wheel of the present invention:
1) earlier that the compound abrasive washing is clean, oven dry; Then compound abrasive is put into the batch mixing pot, add the KH550 silane coupler again, stir and let coupling agent be coated in the compound abrasive surface uniformly, in weight ratio, compound abrasive: silane coupler=100:0.3;
2) compound abrasive, the phenolic resins that will form by brown corundum and white fused alumina, float pearl, calcium carbonate, carbon black and in batch mixer, stir;
3) sieve step 1) gained compound is placed 4～6 hours in environment temperature is 20～25 ℃ magazine after and promptly get molding mass;
4) in mould, put into said lower floor glass fiber mesh sheet; Molding mass is put into die cavity to be shakeout; Put into upper strata glass fiber mesh sheet, location becket again, build cope match-plate pattern and push and impose 18～20Kpa pressure pressurize 3-5 in the forcing press after second, unload extruding dies and promptly get molded blank;
5) molded blank is put into hardening furnace sclerosis, 180 ℃ of the highest hardening temperatures, firm time 16 hours;
6) be cooled to normal temperature.
Above material is 4.0mm through being processed into thickness, the HIgh strength drying railway track resin abrasive cutting wheel sheet of density 2.35g/cm.
In the hardening process, hardening temperature slowly heats up since 60 ℃, evenly is heated to 180 ℃ through 10 hours, keeps 180 ℃ of sclerosis evenly to reduce to room temperature after 6 hours then and comes out of the stove and get product.
Claims (10)
1. high-strength dry-type rail resin abrasive cutting wheel; Comprise that centralized positioning is with becket and cutting grinding wheel two parts; It is characterized in that; Said cutting grinding wheel comprises upper strata glass fiber mesh sheet, the middle equally distributed moulding bed of material and lower floor's glass fiber mesh sheet, and said upper strata glass fiber mesh sheet and lower floor's glass fiber mesh sheet all adopt 320g/m
2～420g/m
2Alkali-free glass fibre net sheet, the said moulding bed of material comprise compound abrasive, phenolic resins, float pearl, calcium carbonate and carbon black, and said compound abrasive is mixed by brown corundum and white fused alumina and forms.
2. high-strength dry-type rail resin abrasive cutting wheel as claimed in claim 1 is characterized in that, in weight portion, the main component of the said moulding bed of material is:
The compound abrasive 70～80 that palm fibre corundum and white fused alumina are formed
Phenolic resins 11～17
Float pearl 5～10
Calcium carbonate 1～3
Carbon black 0.2～0.3.
3. high-strength dry-type rail resin abrasive cutting wheel as claimed in claim 2 is characterized in that, the weight ratio of brown corundum and white fused alumina is 70:30～40:60 in the compound abrasive that said brown corundum and white fused alumina are formed.
4. high-strength dry-type rail resin abrasive cutting wheel as claimed in claim 3 is characterized in that, the weight ratio of brown corundum and white fused alumina is 50:50 in the compound abrasive that said brown corundum and white fused alumina are formed.
5. according to claim 1 or claim 2 high-strength dry-type rail resin abrasive cutting wheel; It is characterized in that; The compound abrasive surfaces coated of said brown corundum and white fused alumina is covered with the KH550 silane coupler, and usage ratio is in weight ratio, compound abrasive: silane coupler=100:0.3.
6. high-strength dry-type rail resin abrasive cutting wheel as claimed in claim 2 is characterized in that, in weight portion, said amount of floating pearl is 7 weight portions.
7. the preparation method of a high-strength dry-type rail resin abrasive cutting wheel; Said high-strength dry-type rail resin abrasive cutting wheel comprises that centralized positioning is with becket and cutting grinding wheel two parts; Said cutting grinding wheel comprises upper strata glass fiber mesh sheet, the middle equally distributed moulding bed of material and lower floor's glass fiber mesh sheet, and said upper strata glass fiber mesh sheet and lower floor's glass fiber mesh sheet all adopt 320g/m
2～420g/m
2Alkali-free glass fibre net sheet, the said moulding bed of material comprise compound abrasive, phenolic resins, float pearl, calcium carbonate and carbon black, and said compound abrasive is mixed by brown corundum and white fused alumina and forms, and it is characterized in that this method may further comprise the steps:
1) compound abrasive, the phenolic resins that will form by brown corundum and white fused alumina, floats pearl, calcium carbonate, carbon black and in batch mixer, stir;
2) sieve step 1) gained compound is placed 4～6 hours in environment temperature is 20～25 ℃ magazine after and promptly get molding mass;
3) in mould, put into said lower floor glass fiber mesh sheet; Molding mass is put into die cavity to be shakeout; Put into upper strata glass fiber mesh sheet, location becket again, build cope match-plate pattern and push and impose 18～20Kpa pressure pressurize 3-5 in the forcing press after second, unload extruding dies and promptly get molded blank;
4) molded blank is put into hardening furnace sclerosis, 170 ℃～190 ℃ of the highest hardening temperatures, firm time 14～20 hours;
5) be cooled to normal temperature.
8. the preparation method of high-strength dry-type rail resin abrasive cutting wheel as claimed in claim 7 is characterized in that, in weight portion, the material proportion that said step 1) is selected for use is respectively:
The compound abrasive 70～80 that palm fibre corundum and white fused alumina are formed
Phenolic resins 11～17
Float pearl 5～10
Calcium carbonate 1～3
Carbon black 0.2～0.3.
The compound abrasive granularity of said brown corundum and white fused alumina is 24～30 orders; Said phenolic resins granularity is 180～200 orders; Said granularity of floating pearl is 280～325 orders; The granularity of said calcium carbonate is 280～325 orders; The granularity of said carbon black is 280～325 orders.
9. preparation method as claimed in claim 7 is characterized in that, in the said step 4) hardening process, hardening temperature slowly was warming up to the highest hardening temperature through 10 hours from 60 ℃, kept this highest hardening temperature slowly to reduce to room temperature after 6 hours more then.
10. preparation method as claimed in claim 7 is characterized in that, adds the compound abrasive treatment step in said step 1) front, is specially: earlier that the compound abrasive washing is clean, and oven dry; Then compound abrasive is put into the batch mixing pot, add the KH550 silane coupler again, stir and let coupling agent be coated in the compound abrasive surface uniformly, wherein, in weight ratio, compound abrasive: silane coupler=100: 0.3.
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| CN102814764A (en) * | 2012-08-01 | 2012-12-12 | 郑州森下磨料磨具有限公司 | Production process of irregular sawtooth-shaped sheet grinding wheel |
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Effective date of registration: 20230914 Address after: No. 2, Baxian Road, North District, Jinghai Economic Development Zone, Jinghai District, Tianjin 301699 Patentee after: J LONG (TIANJIN) ABRASIVE CO.,LTD. Address before: 065900 east section of Binhe County, Hebei Province Patentee before: LANGFANG J LONG HARDWARE ABRASIVE Co.,Ltd. |