CN108247552A - A kind of rail reconditioning special-purpose metal resin composite materials grinding wheel and its manufacturing method - Google Patents
A kind of rail reconditioning special-purpose metal resin composite materials grinding wheel and its manufacturing method Download PDFInfo
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- CN108247552A CN108247552A CN201810126856.1A CN201810126856A CN108247552A CN 108247552 A CN108247552 A CN 108247552A CN 201810126856 A CN201810126856 A CN 201810126856A CN 108247552 A CN108247552 A CN 108247552A
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- Prior art keywords
- cbn
- grinding wheel
- rail
- abrasive material
- fused alumina
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/14—Zonally-graded wheels; Composite wheels comprising different abrasives
-
- 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
Abstract
The invention discloses a kind of rail reconditioning special-purpose metal resin composite materials grinding wheel and its manufacturing methods, belong to grinding wheel technical field, stone layer of the grinding wheel including matrix, matrix upper end；Stone layer includes soldering CBN agglomerates and resinoid bond fused alumina zirconia abrasive material；The soldering CBN agglomerates are cylindrical soldering CBN grinding blocks, and disc is grinding surface；Soldering CBN sintering block gap homogeneous verticals are inserted into resinoid bond fused alumina zirconia abrasive material；The composite material grinding wheel of the present invention can keep preferable sharpness under the state of working long hours, and generate less grinding heat, improve rail material removal efficiency, mitigate rail burn blue phenomenon, Rail Surface better quality after reconditioning, roughness is lower, and Rail Surface is finer and smoother.
Description
Technical field
The invention belongs to grinding wheel technical fields, are related to a kind of grinding tool, and especially a kind of rail reconditioning special-purpose metal resin is answered
Condensation material grinding wheel and its manufacturing method.
Background technology
During Chinese society economy constantly promotes, railway is always that the most important infrastructure of country is passed through with national
The main artery of Ji, the especially fast development of high-speed railway in recent years, railway construction is in China's composite communications transport body
Occupy leading position in system.Rail is the carrier of all railway traveling equipment, it is directly contacted with train wheel, bears top biography
The wheel load effect come, easily occurs damage situations, such as wave mill, crackle, fat edges, conquassation, spot corrosion, jeopardizes traffic safety.In order to
These diseases is avoided to affect traffic safety, the processing method of early stage is exactly to replace rail.But a large amount of rail in advance
It is retired to cause a large amount of resource and energy waste.It was discovered by researchers that carrying out science reconditioning to rail using train of polishing is
Improve Wheel Rail Contact state, eliminate and delay Rail Surface hurt, improve the ride comfort of track, extend the service life of rail
Most efficient method and economic preferred plan.
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
Hold is weaker, and abrasive material easily comes 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 efficiency is low, and rail thinning surface is of poor quality, is easy to burn blue phenomenon occur.
Invention content
The present invention discloses a kind of rail reconditioning special-purpose metal resin composite materials for problems of the prior art
Grinding wheel and its manufacturing method are by conventional resins concretion abrasive skill by introducing cylindrical soldering CBN agglomerates in grinding wheel
Art is combined, while this method allows between bonding agent and CBN abrasive materials and generates metallurgical reaction, obtains with soldering consolidation super hard abrasive technology
The high hold to abrasive material is obtained, while abrasive material proud exposure is high, solves problems of the prior art.
The invention is realized in this way：
A kind of rail reconditioning special-purpose metal resin composite materials grinding wheel, which is characterized in that the grinding wheel is including on matrix, matrix
The stone layer at end；The stone layer includes soldering CBN agglomerates and resinoid bond fused alumina zirconia abrasive material；It is described
Soldering CBN agglomerates be cylindrical soldering CBN grinding blocks, cylindrical grinding block is selected to be compared to rectangular, it is possible to reduce mill
Cut stress, disc is grinding surface, bottom surface 5 ~ 20mm of radius, high 40 ~ 70mm；The soldering CBN sintering block gap homogeneous verticals
It is inserted into resinoid bond fused alumina zirconia abrasive material, the disc of the soldering CBN agglomerates is parallel with the level of stone layer.
Further, the soldering CBN agglomerates are inserted into resinoid bond with 15 ° ~ 45 ° equiangularly spaced homogeneous verticals
In fused alumina zirconia abrasive material.
Further, the soldering CBN agglomerates are powder sintered by Cu-Sn-Ti solder alloys powder, CBN abrasive materials and HBN
The cylinder formed.
The invention also discloses a kind of manufacturing method of rail reconditioning special-purpose metal resin composite materials grinding wheel, feature exists
In method is as follows：
Step 1：Make soldering CBN agglomerates；
1.1, CBN abrasive materials, Cu-Sn-Ti solder alloys powder and HBN solid lubricant powders, wherein CBN matter are weighed in mass ratio
It is that 50% ~ 70%, HBN solid lubricant powder quality accounts for that amount accounting, which is 20% ~ 40%, Cu-Sn-Ti solder alloy powder qualities accounting,
Than being 5% ~ 10%；CBN has the high rigidity for being only second to diamond, also with preferable thermal stability, with hexagonal boron nitride（HBN）
As the combination of solid lubricant material, reduction friction coefficient, the effect of less grinding heat are further functioned as in grinding process；
The incorporation of Cu-Sn-Ti solder alloys powder can improve CBN abrasive materials and the bond strength of HBN, and the grinding wheel of making is with higher resistance to
Expenditure.
1.2, the CBN abrasive materials weighed, Cu-Sn-Ti solder alloys powder and HBN solid lubricant powders are mixed, and
It is stirred evenly after adding in binder, binder accounts for the 3% of mixture gross mass；
1.3, uniformly mixed mixture is loaded into mold, into press, to be cold-pressed compression moulding under the molding pressure of 6t；
The green compact of forming is dried into hardening.
1.4, drying green compact is put into vacuum annealing furnace, the heating rate of 10 DEG C/min is selected, is heated to 950 DEG C, makes
With brazing filler metal alloy powder metallurgical reaction occurs for CBN abrasive materials, keeps the temperature furnace cooling after 20min, makes cylindrical soldering CBN grindings
Block；
Step 2：Prepare resinoid bond fused alumina zirconia abrasive material；First ground with the fused alumina zirconia that furfural uniform wet granularity is 14-16 mesh
Material adds in phenolic resin binder, is uniformly mixed, and forms resinoid bond fused alumina zirconia abrasive material；
Step 3：The resinoid bond fused alumina zirconia abrasive material of above-mentioned steps two is put into particular manufacturing craft, the cylindrical pricker that will be made
Weldering CBN grinding blocks are inserted into 15 ° ~ 45 ° equiangularly spaced homogeneous verticals in the mixture；
Step 4：Mold in step 3 is entered into hot press-demouding molding, produces grinding wheel green compact；
Step 5：The grinding wheel green compact of step 4 is put into baking oven, composite wheel finished product is produced in drying hardening.
Further, the particle size range of the CBN abrasive materials is the mesh of 30 mesh ~ 60, abrasive concentration 0.44g/cm3~1.1g/
cm3。
Further, the phenolic resin binder mass ratio is 18 ~ 22%；The granularity is selected to be for the fused alumina zirconia of 14-16 mesh
Abrasive material, mass ratio are 78 ~ 82%.
Further, the parameter of the drying hardening in step 1 is：It is placed in 40 DEG C of drying in oven hardening, time 1h.
Further, the technological parameter of the hot press in step 4 is：The hot pressing 60min under 180 DEG C of hot pressing temperatures.
Further, the parameter of the drying hardening in step 5 is：It is placed in 150 DEG C of drying in oven hardening, time 6h.
The present invention is compared to the advantageous effect of the prior art：
1）It is to be combined conventional resins concretion abrasive technology with soldering consolidation super hard abrasive technology using the method for the present invention,
It allows between Cu-Sn-Ti solder alloys powder, HBN solid lubricant powders and CBN abrasive materials and generates metallurgical reaction, obtain to abrasive material
High hold, while abrasive material proud exposure is high, and will not come off too early；
2）After CBN abrasive materials generate metallurgical reaction with Cu-Sn-Ti solder alloys powder, HBN solid lubricant powders simultaneously, have
Stronger chemical stability is not susceptible to chemically react.Therefore composite material grinding wheel can be kept under the state of working long hours compared with
Good sharpness generates less grinding heat, improves rail material removal efficiency, mitigates rail burn blue phenomenon, after reconditioning
Rail Surface better quality, roughness is lower, and Rail Surface is finer and smoother；
3）Cylinder soldering CBN grinding blocks are placed in the working lining with preferable toughness, are played support protection to a certain extent and are made
With the problem of preventing intense impact from bringing broken damage to CBN, the ablation of CBN being played to the full extent, improve sand
The wearability of wheel increases the service life of grinding wheel, while the cylindrical grinding stress generated on grinding block that can reduce；
4）By phenol-formaldehyde resin modified combination fused alumina zirconia abrasive material, which reduces grinding wheel inherent strain, resists grinding area high temperature pair
The damage of grinding wheel improves grinding wheel density, calorific intensity, and the reliability and durability of grinding wheel are good.
Description of the drawings
Fig. 1 is a kind of vertical view of rail reconditioning special-purpose metal resin composite materials grinding wheel of the present invention；
Fig. 2 is a kind of structure diagram of rail reconditioning special-purpose metal resin composite materials stone layer of the present invention；
Wherein, 1- matrixes；2- stone layers；3- is brazed CBN agglomerates；4- resinoid bond fused alumina zirconia abrasive materials.
Specific embodiment
To make the purpose of the present invention, technical solution and effect clearer, clearly, referring to the drawings and give an actual example to this
Invention is further described.It should be understood that specific implementation described herein is not used to limit only to explain the present invention
The present invention.
The method that the grinding wheel is made in the present invention is specially：
First process soldering CBN agglomerates 3；First by setting ratio weigh Cu-Sn-Ti solder alloys powder, CBN abrasive materials and
The Cu-Sn-Ti solder alloys powder, CBN abrasive materials and the HBN powder that have weighed are mixed and added into appropriate amount of fluid paraffin by HBN powder
It is stirred evenly after binder.Three's mixture is loaded into particular manufacturing craft, the size of carcass can be controlled by die size, pressed
To be cold-pressed compression moulding under the molding pressure of 6t under machine.The green compact of forming is placed in 40 DEG C of drying in oven to harden, the time is
1h.Will drying green compact be put into vacuum annealing furnace, select 10 DEG C/min heating rate, be heated to 950 DEG C, make CBN abrasive materials with
Metallurgical reaction occurs for brazing filler metal alloy powder, keeps the temperature furnace cooling after 20min, produces soldering CBN grinding blocks 3.
Reselection phenol-formaldehyde resin modified（Phenolic resin binder）And the mixing of fused alumina zirconia abrasive material, phenol-formaldehyde resin modified quality
Than being 18 ~ 22%；It for the fused alumina zirconia of 14-16 mesh is abrasive material to select granularity, and mass ratio is 78 ~ 82%, first uniformly moistens zirconium with furfural
Then corundum abrasive adds resinoid bond, carry out batch mixing, is uniformly mixed, prepares resinoid bond fused alumina zirconia abrasive material 4.
By resinoid bond fused alumina zirconia abrasive material 4, i.e. resin fused alumina zirconia mixture puts into mold, according to different grinding vehicle models
And the difference of reconditioning operation, various sizes of mold can be designed, so as to produce various sizes of rail reconditioning composite wood
Expect grinding wheel.The soldering grinding block 3 is inserted vertically into mixture using the tooling of design, the soldering grinding block 3 being plugged exists
With 15 ° ~ 45 ° equiangularly spaced distributions on whole circumference face, the quantity variation of the distribution of soldering grinding block 3, which can utilize, designs tooling
It realizes.
Mold is entered into hot press, hot pressing stripping forming after sixty minutes, obtains grinding wheel base under the conditions of 180 DEG C.
Grinding wheel base is placed in baking oven, through 150 DEG C, drying hardening under the conditions of 6h is kept the temperature, obtains composite material finished grinding wheel.Into
Stone layer 2 of the grinding wheel of product including matrix 1,1 upper end of matrix；Stone layer 2 includes soldering CBN agglomerates 3 and tree
Fat bonding agent fused alumina zirconia abrasive material 4.
Embodiment 1
Weigh the CBN abrasive materials that quality accounting is 40%, abrasive concentration 0.88g/cm3, quality accounting be 55% Cu-Sn-Ti close
Gold brazing filler metal powder, it is HBN powder that quality accounting, which is 5%, and adds in 3% atoleine binder of mixture gross mass.According to
Soldering CBN agglomerates 3 are prepared in above-mentioned steps.It is 5mm, high 50mm to be brazed 3 bottom surface radius of CBN grinding blocks.
Reselection phenolic resin binder and the mixing of fused alumina zirconia abrasive material, phenol-formaldehyde resin modified mass ratio are 18%；Select grain
It is abrasive material to spend for the fused alumina zirconia of 14-16 mesh, and mass ratio 82% first uniformly moistens fused alumina zirconia abrasive material with furfural, then adds tree
Fat bonding agent carries out batch mixing, is uniformly mixed, prepares resinoid bond fused alumina zirconia abrasive material 4.
3 totally 12 pieces of CBN agglomerates are brazed, with 30 ° for angle interval, are angularly distributed in stone layer whole circumference.
Grinding wheel diameter is 150mm, and thickness 60mm, working lining grinding surface annulus width is 50mm.The composite material grinding wheel is suitable for type
Number be RGH20C track switch reconditioning train.
Embodiment 2
Weigh the CBN abrasive materials that quality accounting is 30%, abrasive concentration 0.66g/cm3, Cu-Sn-Ti solder alloy powder qualities account for
Than being 7.5% for 62.5%, HBN powder qualities accounting.And add in 3% atoleine binder of mixture gross mass.According to upper
It states step and soldering CBN agglomerates 3 is prepared.It is 5mm, high 50mm to be brazed CBN grinding blocks bottom surface radius.
Reselection phenol-formaldehyde resin modified（Phenolic resin binder）And the mixing of fused alumina zirconia abrasive material, phenol-formaldehyde resin modified quality
Than being 22%；It for the fused alumina zirconia of 14-16 mesh is abrasive material to select granularity, and mass ratio 78 first uniformly moistens fused alumina zirconia mill with furfural
Then material adds resinoid bond, carry out batch mixing, is uniformly mixed, prepares resinoid bond fused alumina zirconia abrasive material 4.
3 totally 12 pieces of CBN agglomerates are brazed, with 30 ° for angle interval, are angularly distributed in stone layer whole circumference,
Grinding wheel diameter is 150mm, and thickness 60mm, working lining grinding surface annulus width is 50mm.The composite material grinding wheel is suitable for type
Number be RGH20C track switch reconditioning train.
Embodiment 3
It is 40% to weigh CBN abrasive material quality accounting, abrasive concentration 0.88g/cm3, Cu-Sn-Ti solder alloy powder quality accountings
It is 5% for 55%, HBN powder qualities accounting.And add in 3% atoleine binder of mixture gross mass.According to above-mentioned steps
Soldering CBN agglomerates 3 are prepared.It is 10mm, high 70mm to be brazed CBN grinding blocks bottom surface radius.
Reselection phenol-formaldehyde resin modified（Phenolic resin binder）And the mixing of fused alumina zirconia abrasive material, phenol-formaldehyde resin modified quality
Than being 20%；It for the fused alumina zirconia of 14-16 mesh is abrasive material to select granularity, and mass ratio 80% first uniformly moistens fused alumina zirconia mill with furfural
Then material adds resinoid bond, carry out batch mixing, is uniformly mixed, prepares resinoid bond fused alumina zirconia abrasive material 4.
3 totally 24 pieces of CBN agglomerates are brazed, with 15 ° for angle interval, are angularly distributed in stone layer whole circumference.
Grinding wheel diameter is 260mm, and thickness 90mm, working lining grinding surface annulus width is 50mm.The composite material grinding wheel is suitable for type
Number be GMC-96X reconditioning trains.
Embodiment 4
It is 30% to weigh CBN abrasive material quality accounting, abrasive concentration 0.66g/cm3, Cu-Sn-Ti solder alloy powder quality accountings
It is 2.5% for 67.5%, HBN powder qualities accounting, and adds in 3% atoleine binder of mixture gross mass.By above-mentioned step
Rapid to produce soldering CBN grinding blocks 3, soldering CBN grinding blocks bottom surface radius is 10mm, high 70mm.
Reselection phenol-formaldehyde resin modified（Phenolic resin binder）And the mixing of fused alumina zirconia abrasive material, phenol-formaldehyde resin modified quality
Than being 19%；It for the fused alumina zirconia of 14-16 mesh is abrasive material to select granularity, and mass ratio 81% first uniformly moistens fused alumina zirconia mill with furfural
Then material adds resinoid bond, carry out batch mixing, is uniformly mixed, prepares resinoid bond fused alumina zirconia abrasive material 4.
3 totally 24 pieces of soldering CBN grinding blocks are chosen, with 15 ° for angle interval, stone layer is angularly distributed in and entirely justifies
Week.Grinding wheel diameter is 260mm, and thickness 90mm, working lining grinding surface annulus width is 50mm.The composite material grinding wheel is suitable for
Model GMC-96X reconditioning trains.
Embodiment 5
It is 20% to weigh CBN abrasive material quality accounting, abrasive concentration 0.66g/cm3, Cu-Sn-Ti solder alloy powder quality accountings
It is 10% for 70%, HBN powder qualities accounting, and adds in 3% atoleine binder of mixture gross mass.By above-mentioned steps
Soldering CBN grinding blocks 3 are produced, soldering CBN grinding blocks bottom surface radius is 5mm, high 40mm.Choose soldering CBN grinding blocks 3 with
45 ° are angle interval, are angularly distributed in stone layer whole circumference.
Embodiment 6
It is 40% to weigh CBN abrasive material quality accounting, abrasive concentration 0.66g/cm3, Cu-Sn-Ti solder alloy powder quality accountings
It is 10% for 50%, HBN powder qualities accounting, and adds in 3% atoleine binder of mixture gross mass.By above-mentioned steps
Soldering CBN grinding blocks 3 are produced, soldering CBN grinding blocks bottom surface radius is 20mm, high 70mm.Choose soldering CBN grinding blocks 3 with
35 ° are angle interval, are angularly distributed in stone layer whole circumference.
Description of the invention and application are illustrative, are not wishing to limit the scope of the invention in above-described embodiment,
Therefore, the present invention is not limited by the present embodiment, what any technical solution obtained using equivalence replacement was protected in the present invention
In the range of.
Claims (9)
1. a kind of rail reconditioning special-purpose metal resin composite materials grinding wheel, which is characterized in that the grinding wheel includes matrix（1）、
Matrix（1）The stone layer of upper end（2）；The stone layer（2）Including being brazed CBN agglomerates（3）And resin knot
Mixture fused alumina zirconia abrasive material（4）；The soldering CBN agglomerates（3）CBN grinding blocks are brazed for cylinder, disc is grinding surface, bottom
Radius surface 5 ~ 20mm, high 40 ~ 70mm；The soldering CBN agglomerates（3）It is firm that interval homogeneous vertical is inserted into resinoid bond zirconium
Beautiful abrasive material（4）In, the soldering CBN agglomerates（3）Disc and stone layer（2）Level it is parallel.
2. a kind of rail reconditioning special-purpose metal resin composite materials grinding wheel according to claim 1, which is characterized in that described
Soldering CBN agglomerates（3）Resinoid bond fused alumina zirconia abrasive material is inserted into 15 ° ~ 45 ° equiangularly spaced homogeneous verticals（4）In.
3. a kind of rail reconditioning special-purpose metal resin composite materials grinding wheel according to claim 1, which is characterized in that described
Soldering CBN agglomerates（3）By Cu-Sn-Ti solder alloys powder, CBN abrasive materials and the powder sintered cylinders formed of HBN.
4. a kind of manufacturing method of rail reconditioning special-purpose metal resin composite materials grinding wheel, which is characterized in that method is as follows：
Step 1：Make soldering CBN agglomerates（3）；
1.1, CBN abrasive materials, Cu-Sn-Ti solder alloys powder and HBN solid lubricant powders, wherein CBN matter are weighed in mass ratio
It is that 50% ~ 70%, HBN solid lubricant powder quality accounts for that amount accounting, which is 20% ~ 40%, Cu-Sn-Ti solder alloy powder qualities accounting,
Than being 5% ~ 10%；,
1.2, the CBN abrasive materials weighed, Cu-Sn-Ti solder alloys powder and HBN solid lubricant powders are mixed, and adds in
It is stirred evenly after binder, the binder is atoleine, accounts for the 3% of mixture gross mass；
1.3, uniformly mixed mixture is loaded into mold, into press, to be cold-pressed compression moulding under the molding pressure of 6t；
The green compact of forming is dried into hardening；
1.4, drying green compact is put into vacuum annealing furnace, the heating rate of 10 DEG C/min is selected, is heated to 950 DEG C, grinds CBN
With brazing filler metal alloy powder metallurgical reaction occurs for material, keeps the temperature furnace cooling after 20min, makes cylindrical soldering CBN grinding blocks；
Step 2：Prepare resinoid bond fused alumina zirconia abrasive material（4）；First with furfural uniform wet fused alumina zirconia abrasive material, phenolic aldehyde tree is added in
Fat bonding agent is uniformly mixed, and forms resinoid bond fused alumina zirconia abrasive material；
Step 3：The resinoid bond fused alumina zirconia abrasive material of above-mentioned steps two is put into particular manufacturing craft, the cylindrical pricker that will be made
Weldering CBN grinding blocks are inserted into 15 ° ~ 45 ° equiangularly spaced homogeneous verticals in the mixture；
Step 4：Mold in step 3 is entered into hot press-demouding molding, produces grinding wheel green compact；
Step 5：The grinding wheel green compact of step 4 is put into baking oven, composite wheel finished product is produced in drying hardening.
5. according to a kind of manufacturing method of rail reconditioning special-purpose metal resin composite materials grinding wheel described in claim 4,
It is characterized in that, the particle size ranges of the CBN abrasive materials is the mesh of 30 mesh ~ 60, abrasive concentration 0.44g/cm3~1.1g/cm3。
6. according to a kind of manufacturing method of rail reconditioning special-purpose metal resin composite materials grinding wheel described in claim 4,
It is characterized in that, the phenolic resin binder mass ratio is 18 ~ 22%；It for the fused alumina zirconia of 14-16 mesh is abrasive material to select granularity,
Its mass ratio is 78 ~ 82%.
7. according to a kind of manufacturing method of rail reconditioning special-purpose metal resin composite materials grinding wheel described in claim 4,
It is characterized in that, the parameter of the drying hardening in step 1 is：It is placed in 40 DEG C of drying in oven hardening, time 1h.
8. according to a kind of manufacturing method of rail reconditioning special-purpose metal resin composite materials grinding wheel described in claim 4,
It is characterized in that, the technological parameter of the hot press in step 4 is：The hot pressing 60min under 180 DEG C of hot pressing temperatures.
9. according to a kind of manufacturing method of rail reconditioning special-purpose metal resin composite materials grinding wheel described in claim 4,
It is characterized in that, the parameter of the drying hardening in step 5 is：It is placed in 150 DEG C of drying in oven hardening, time 6h.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112388522A (en) * | 2019-08-12 | 2021-02-23 | 南昌巨晶砂轮科技有限公司 | Preparation method of grinding tool for grinding arc teeth |
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