CN114083449A - Resin grinding wheel for cutting and disassembling reinforced concrete and preparation method and application thereof - Google Patents
Resin grinding wheel for cutting and disassembling reinforced concrete and preparation method and application thereof Download PDFInfo
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- CN114083449A CN114083449A CN202111392842.2A CN202111392842A CN114083449A CN 114083449 A CN114083449 A CN 114083449A CN 202111392842 A CN202111392842 A CN 202111392842A CN 114083449 A CN114083449 A CN 114083449A
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- 238000000227 grinding Methods 0.000 title claims abstract description 85
- 238000005520 cutting process Methods 0.000 title claims abstract description 72
- 229920005989 resin Polymers 0.000 title claims abstract description 60
- 239000011347 resin Substances 0.000 title claims abstract description 60
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 61
- 239000005011 phenolic resin Substances 0.000 claims abstract description 61
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 60
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000010431 corundum Substances 0.000 claims abstract description 22
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 22
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 11
- 239000011591 potassium Substances 0.000 claims abstract description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 11
- 239000007822 coupling agent Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 49
- 239000000463 material Substances 0.000 claims description 21
- 229920001169 thermoplastic Polymers 0.000 claims description 21
- 239000004416 thermosoftening plastic Substances 0.000 claims description 21
- 239000003365 glass fiber Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 15
- 229920001187 thermosetting polymer Polymers 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000011265 semifinished product Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 8
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 30
- 238000003892 spreading Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000012778 molding material Substances 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 239000004567 concrete Substances 0.000 description 5
- 239000010432 diamond Substances 0.000 description 5
- 229910003460 diamond Inorganic materials 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000007767 bonding agent Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- 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
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
- 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
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/02—Wheels in one piece
- B24D5/04—Wheels in one piece with reinforcing means
-
- 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
Abstract
The invention belongs to the technical field of mold processing, and particularly relates to a resin grinding wheel for cutting and disassembling reinforced concrete and a preparation method and application thereof. The invention relates to a resin grinding wheel for cutting and disassembling reinforced concrete, which is prepared from the following raw materials in parts by weight: 60-70 parts of white corundum abrasive, 30-40 parts of silicon carbide abrasive, 15-20 parts of phenolic resin, 5-15 parts of potassium hexaluminate, 2-5 parts of calcium sulfate whisker and 0.4-0.6 part of coupling agent.
Description
Technical Field
The invention belongs to the technical field of mold processing, and particularly relates to a resin grinding wheel for cutting and disassembling reinforced concrete and a preparation method and application thereof.
Background
The grinding wheel is also called a consolidation grinding tool, and is a consolidation grinding tool which is formed by consolidating common grinding materials into a certain shape (mostly circular, with a through hole in the center) by a bonding agent and has certain strength. It is generally composed of abrasive, bond and air holes, which are often referred to as the three elements of a bonded abrasive tool. According to different classes of binders, ceramic (binder) grinding wheels, resin (binder) grinding wheels, and rubber (binder) grinding wheels are common. The grinding wheel is the one with the largest use amount and the widest use range in the grinding tool, rotates at high speed when in use, and can perform coarse grinding, semi-fine grinding, slotting, cutting and the like on the excircle, the inner circle, the plane, various molded surfaces and the like of a metal or nonmetal workpiece.
At present, the bonding agent is mainly divided into four types, namely ceramic, resin, rubber and metal, wherein the resin bonding agent has high strength, large elasticity and impact resistance, is suitable for high-speed grinding with v more than 50m/s, and can be made into a sheet grinding wheel for groove grinding, cutting and the like. Grinding wheels using resin as a binder are called resin grinding wheels. The resin grinding wheel is generally divided into a common resin grinding wheel and a super-hard resin grinding wheel according to an abrasive. The common resin grinding wheel is a grinding wheel taking common grinding materials such as white corundum, brown corundum, silicon carbide and the like as main grinding components, and the super-hard resin grinding wheel is a grinding wheel taking diamond or CBN as main grinding components. The resin grinding wheel has the advantages of small grinding force, low grinding temperature, good self-sharpening property, high grinding efficiency and the like, and is widely applied to grinding processing of hard and brittle materials such as hard alloy, ceramic, glass and the like.
The cutting test to reinforced concrete discovers that the diamond saw blade or the alloy toothless saw blade is used for cutting cement stones quickly when the reinforced concrete is cut, but the speed is low when the concrete internal steel bars are cut, a large amount of friction heat is accumulated, the temperature is increased, the saw blade is deformed or the teeth fall, dangerous accidents occur, and the disassembly and the rescue and other emergency work are not facilitated. The common grinding wheel cutting of the steel bar is relatively quick, but cannot be used for cutting concrete.
Disclosure of Invention
The invention provides a resin grinding wheel for cutting and disassembling reinforced concrete.
The invention further aims to provide a preparation method of the grinding wheel.
It is a further object of the invention to provide a use of the grinding wheel described above.
The resin grinding wheel for cutting and disassembling the reinforced concrete is prepared from the following raw materials in parts by weight: 60-70 parts of white corundum abrasive, 30-40 parts of silicon carbide abrasive, 15-20 parts of phenolic resin, 5-15 parts of potassium hexaluminate, 2-5 parts of calcium sulfate whisker and 0.4-0.6 part of coupling agent.
The resin grinding wheel for cutting and disassembling the reinforced concrete is prepared from the following raw materials in parts by weight: 63 parts of white corundum abrasive, 37 parts of silicon carbide abrasive, 19 parts of phenolic resin, 10 parts of potassium hexaluminate, 4 parts of calcium sulfate whisker and 0.5 part of coupling agent.
According to the resin grinding wheel for cutting and disassembling the reinforced concrete, the phenolic resin is composed of phenolic resin liquid and phenolic resin powder, and the weight ratio of the phenolic resin liquid to the phenolic resin powder is 1: 1-3, wherein the phenolic resin powder comprises thermosetting phenolic resin powder and thermoplastic phenolic resin powder, and the weight ratio of the thermosetting phenolic resin powder to the thermoplastic phenolic resin powder is 7: 3.
according to the resin grinding wheel for cutting and disassembling the reinforced concrete, the coupling agent is KH550 silane coupling agent or KH570 silane coupling agent.
The method for preparing the resin grinding wheel for cutting and disassembling the reinforced concrete according to the embodiment of the invention comprises the following steps:
(1) mixing materials: uniformly mixing a white corundum abrasive, a silicon carbide abrasive, phenolic resin, potassium hexachlorophtalate, calcium sulfate whiskers and a coupling agent to obtain a mixture;
(2) molding: putting the mixture obtained in the step (1) and the glass fiber mesh into a die cavity in sequence, and pressing the mixture and the glass fiber mesh by using a 500-ton press under the pressure of 14 MPa to obtain a semi-finished product;
(3) and curing the semi-finished product.
According to the preparation method of the resin grinding wheel for cutting and disassembling the reinforced concrete, disclosed by the embodiment of the invention, in the step (1), the white corundum grinding material is pretreated, and the pretreatment steps are as follows: mixing white corundum abrasive with sodium silicate aqueous solution, adding zirconium oxide powder (ZrO)2) Fully mixing, and baking at 900-950 ℃ for 20-40 minutes.
Wherein sodium silicate "Na2O·nSiO2"the aqueous solution is also called water glass.
According to the method for preparing the resin grinding wheel for cutting and disassembling the reinforced concrete, in the step (1), the amount of the sodium silicate is 1-1.5% of the weight of the white corundum grinding material, and the amount of the zirconia powder is 0.8-1.2% of the weight of the white corundum grinding material.
According to the preparation method of the resin grinding wheel for cutting and disassembling the reinforced concrete, in the step (2), the glass fiber mesh and the mixture are sequentially added in the following order: glass fiber meshes, mixtures, glass fiber meshes, mixtures and glass fiber meshes;
the resin grinding wheel is structurally characterized in that three layers of nets and two layers of molding materials are arranged, a flat product is distributed from top to bottom in sequence, and the specific molding process comprises the following steps:
1. releasing the net (putting the first layer of glass fiber net sheet into the cavity of the mould);
2. baking net (heating with infrared heating tube for heating and softening glass fiber net sheet);
3. mesh pressing (pressing the softened glass fiber mesh sheet to a bottom plate of the mold so as to rotate synchronously with the mold during rotary spreading);
4. feeding (a first layer of molding material is fed into a mold cavity);
5. spreading the material (in a rotary spreading mode, the mould cavity rotates, the scraper does not rotate, and the formed material is uniformly spread);
6. releasing the net (the second layer of glass fiber net sheet is released into the cavity of the mould);
7. feeding (a second layer of molding material is fed into the mold cavity);
8. spreading the material (in a rotary spreading mode, the mould cavity rotates, the scraper does not rotate, and the formed material is uniformly spread);
9. releasing the net (putting the third layer of glass fiber net sheet into the cavity of the mould);
10. pressing (pressing with 500 ton press at 14 MPa for 1.5 s);
11. and (4) demolding (taking the press-molded semi-finished product out of the mold cavity).
According to the method for preparing the resin grinding wheel for cutting and disassembling the reinforced concrete, in the step (3), the temperature rise curve of the semi-finished product during curing is as follows: zone 1, 70 ℃; zone 2, 72 ℃; zone 3, 75 ℃; zone 4, 75 ℃; zone 5, 80 ℃; zone 6, 85 ℃; zone 7, 90 ℃; zone 10, 100 ℃; zone 11, 112 ℃; zone 12, 120 ℃; zone 13, 128 ℃; zone 14, 1338 ℃; zone 15, 148 ℃; zone 16, 160 ℃; zone 17, 170 ℃; zone 18, 180 ℃; zone 19, 182 ℃; zone 20, 182 ℃; zone 21, 182 ℃; zone 22, 182 ℃; zone 23, 182 ℃; zone 24, 182 ℃; zone 25, 182 ℃; zone 26, 182 ℃; zone 27, 175 ℃, each zone was held for 1 hour.
The invention uses a tunnel furnace to heat and solidify the grinding wheel, each 1.2 m in the tunnel furnace is a temperature zone, and each temperature zone corresponds to temperature control heating and wind circulation. The product to be cured advances one warm zone per hour. The tunnel furnace has 36 temperature zones from 28 temperature zones to 36 temperature zones, is a non-heating cooling zone, can be slowly cooled, and effectively avoids shrinkage fracture of resin and deformation of the grinding wheel body caused by too fast cooling.
The invention also provides application of the resin grinding wheel for cutting and disassembling reinforced concrete.
The invention has the beneficial effects that:
in the aspect of reinforced concrete cutting application, compared with the traditional diamond saw blade, the diamond saw blade disclosed by the invention has the advantages that the cutting speed of the steel bar is increased during cutting, and the safety problems caused by the temperature rise of the diamond saw blade and the deformation and breakage of the saw blade due to the accumulation of cutting heat are avoided. Meanwhile, compared with the traditional resin grinding wheel which has a single application working condition and can only cut concrete or steel bars, the resin grinding wheel integrates the functionality of the traditional grinding wheel, can cut concrete and steel bars, and can cut wet and dry types.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention. In the following examples, 1 part by weight corresponds to 1 kg.
EXAMPLE 1 pretreatment of abrasives
Fully mixing 100 parts of white corundum abrasive with 1.0-1.5 parts of sodium silicate aqueous solution (the concentration is 50-51 degrees Bebaume), adding 0.8-1.2 parts of zirconia powder for fully mixing, and baking for 30 minutes at the temperature of 900-950 ℃.
The invention finds that the pretreatment effect is related to the proportion of the formula materials, the baking temperature and the baking time are particularly important for hardening the sodium silicate aqueous solution, the surface strength of the white corundum can be improved, and the toughness of the abrasive is enhanced.
Example 2 preparation of resin grinding wheel of the invention
The resin grinding wheel is prepared from the following raw materials in parts by weight:
60 parts of white corundum abrasive, 30 parts of silicon carbide abrasive, 15 parts of phenolic resin, 5 parts of potassium hexaluminate, 2 parts of calcium sulfate whisker and 0.4 part of KH550 silane coupling agent, wherein the weight ratio of the resin liquid to the resin powder is 1: 1, wherein the phenolic resin powder consists of thermosetting phenolic resin powder and thermoplastic phenolic resin powder, and the weight ratio of the thermosetting phenolic resin powder to the thermoplastic phenolic resin powder is 7: 3.
the preparation method of the grinding wheel comprises the following steps:
(1) mixing materials:
(1-1) quantitatively adding the required grinding materials into a mixer, and uniformly mixing.
And (1-2) adding a KH550 silane coupling agent to wet and wrap the abrasive, and heating by a hot air blower to promote drying.
(1-3) adding the required resin liquid, fully mixing, and fully wetting the grinding material.
(1-4) putting the mixed powder of the resin powder, the potassium hexafluoaluminate and the calcium sulfate crystal whiskers which are mixed uniformly in advance into a mixer, and fully mixing the mixed powder with the grinding material wetted by the resin liquid.
(1-5) after the materials are mixed to be in a uniform powder-free state, putting the materials into a forming material box, and standing the materials for 24 hours for standing to obtain a mixture;
(2) molding:
(2-1) putting the first layer of glass fiber mesh into a mold cavity;
(2-2) baking net: heating by an infrared heating pipe;
(2-3) screen pressing: compressing the softened glass fiber mesh to a bottom plate of the mold so as to synchronously rotate with the mold during rotary spreading;
(2-4) feeding: placing the first layer of molding material into the mold cavity;
(2-5) spreading: the molding material is uniformly spread by a rotary spreading mode, the mold cavity rotates, the scraper does not rotate;
(2-6) putting the second layer of glass fiber mesh into the mold cavity;
(2-7) placing the second layer of molding material into the mold cavity;
(2-8) spreading: the molding material is uniformly spread by a rotary spreading mode, the mold cavity rotates, the scraper does not rotate;
(2-9) putting the third layer of glass fiber mesh into the mold cavity;
(2-10) pressing: pressing with a 500 ton press under 14 MPa for 1.5 s;
(2-11) taking out the press-formed semi-finished product from the mold cavity;
(3) curing the semi-finished product:
and (3) sequentially penetrating the semi-finished product after the demolding and the isolation gasket together, pressurizing, and conveying into a hardening furnace for curing, wherein the curing temperature rise curve is as follows:
zone 1, 70 ℃; zone 2, 72 ℃; zone 3, 75 ℃; zone 4, 75 ℃; zone 5, 80 ℃; zone 6, 85 ℃; zone 7, 90 ℃; zone 10, 100 ℃; zone 11, 112 ℃; zone 12, 120 ℃; zone 13, 128 ℃; zone 14, 1338 ℃; zone 15, 148 ℃; zone 16, 160 ℃; zone 17, 170 ℃; zone 18, 180 ℃; zone 19, 182 ℃; zone 20, 182 ℃; zone 21, 182 ℃; zone 22, 182 ℃; zone 23, 182 ℃; zone 24, 182 ℃; zone 25, 182 ℃; zone 26, 182 ℃; zone 27, 175 ℃; each warm zone was held for 1 hour.
And discharging the steel from the furnace after the hardening is finished. And (5) disassembling the tool after cooling to obtain a finished product.
Example 3 preparation of resin grinding wheel of the invention
The resin grinding wheel is prepared from the following raw materials in parts by weight:
70 parts of white corundum abrasive, 40 parts of silicon carbide abrasive, 20 parts of phenolic resin, 15 parts of potassium hexaluminate, 5 parts of calcium sulfate whisker and 0.6 part of KH550 silane coupling agent, wherein the weight ratio of the resin liquid to the resin powder is 1: 3, wherein the phenolic resin powder consists of thermosetting phenolic resin powder and thermoplastic phenolic resin powder, and the weight ratio of the thermosetting phenolic resin powder to the thermoplastic phenolic resin powder is 7: 3.
example 4 preparation of resin grinding wheel of the invention
The resin grinding wheel is prepared from the following raw materials in parts by weight:
63 parts of white corundum abrasive, 37 parts of silicon carbide abrasive, 19 parts of phenolic resin, 10 parts of potassium hexaluminate, 4 parts of calcium sulfate whisker and 0.5 part of KH550 silane coupling agent, wherein the weight ratio of the resin liquid to the resin powder is 7.6: 13.4, wherein the phenolic resin powder consists of thermosetting phenolic resin powder and thermoplastic phenolic resin powder, and the weight ratio of the thermosetting phenolic resin powder to the thermoplastic phenolic resin powder is 7: 3.
example 5 confirmation of the Effect of the resin grinding wheel of the present invention
Workpiece for testing: c30 concrete square column, the section is 10 x 10cm, the diameter of embedded is 16mm, three-stage, 4 pieces of HRB400E deformed steel; the cutting machine for testing: a Husqvarna K1250 cutter; the fixing mode of the cutting machine is as follows: hand-held/mobile.
The specification of the grinding wheel for testing is as follows: the embodiment 4 of the invention is that the resin grinding wheel T41CA-355 is multiplied by 3.2 is multiplied by 20mm for the special large slice for cutting the reinforced concrete;
comparison product: T41A-355X 3.2X 20mm for common metal, T41C-355X 3.2X 20mm for stone and-350X 25.4mm for alloy saw blade.
TABLE 1 cutting effect of the resin grindstone of the present invention on a commercially available product (waterless dry cutting)
According to data in table 1, when dry cutting is performed on reinforced concrete, compared with other three groups of products, the cutting speed and the cutting ratio of the product in example 4 are obviously improved, the product has no obvious cutting heat accumulation, and the product tissue is not damaged by burning, which shows that the grinding wheel has better tissue self-sharpening performance and heat dissipation performance.
The product is used for watering and wet cutting, and the results are shown in a table 2:
TABLE 2 cutting effect of the resin grindstone of the present invention on a commercially available product (wet cutting with water)
According to data in table 2, when the reinforced concrete is watered and wet-cut, compared with other three groups of products, the cutting speed and the cutting ratio of the product in the embodiment 4 are obviously improved, the product has no obvious cutting heat accumulation, the product tissue is not damaged by burning, the hand feeling is smooth, and the tissue self-sharpening performance and the heat dissipation performance of the product are better.
The formulation in example 4 was adjusted to omit the thermoplastic phenolic resin powder, the proportion of phenolic resin was 7.6: 13.4, the proportion of other components is not changed. The results of dry cutting without water and wet cutting with water were obtained for the control 1 and the product of example 4 of the present invention, respectively, as shown in tables 3 and 4:
TABLE 3 comparison of cutting effect before and after omitting the thermoplastic phenolic resin powder (waterless dry cutting)
According to the data in Table 3, the product of example 4 has substantially the same service life, the cutting speed is significantly increased, the self-sharpening property of the product of comparative example 1 is significantly reduced, the heat accumulation is increased, and the product has burn damage when dry-cutting reinforced concrete is performed with the product of comparative example 1 (the product of example 4 with the thermoplastic phenolic resin removed).
TABLE 4 comparison of cutting effect before and after omitting the thermoplastic phenolic resin powder (watering wet cutting)
The data in Table 4 show that the product of example 4 has substantially the same life and reduced cutting speed when used for wet cutting of reinforced concrete with water as the product of control 1 (example 4 with the thermoplastic phenolic resin removed) because of the clogging of the pores in the grinding wheel structure. The self-sharpening performance of the comparison product 1 is improved when wet cutting is carried out, the heat accumulation condition is reduced, but compared with the product in the embodiment 4, the product still has obvious burn, but no breakage occurs.
The invention adjusts the proportion of thermosetting phenolic resin powder and thermoplastic phenolic resin powder on the basis of the embodiment 4, other components are not changed,
control 2: thermosetting phenolic resin powder: phenol novolac powder 7.5: 2.5;
control 3: thermosetting phenolic resin powder: powder of thermoplastic phenolic resin 6.5: 3.5.
the results of comparing the control products 2 and 3 with the product of example 4 are shown in tables 5 and 6:
TABLE 5 comparison of cutting effect by adjusting proportion of thermoplastic phenolic resin powder (waterless dry cutting)
TABLE 6 comparison of cutting effect by adjusting proportion of thermoplastic phenolic resin powder (watering wet cutting)
After the adjustment test of the mixing ratio of the thermosetting and thermoplastic phenolic resins, it was found that the ratio used in example 4 has advantages in both the life and the cutting performance in comparison with the control products 2 and 3. The control 2, because of the reduced amount of thermoplastic resin, resulted in a slow cutting speed and heat accumulation, resulting in burning of the grinding wheel and accelerated cutting loss. The cutting speed of the comparative example 3 is not improved more than that of the example 4 because the amount of the thermoplastic phenolic resin is increased, the adhesive strength of the phenolic resin to the abrasive is reduced due to the friction impact with the reinforced concrete during cutting, and the cutting force is attenuated.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The resin grinding wheel for cutting and disassembling reinforced concrete is characterized by being prepared from the following raw materials in parts by weight: 60-70 parts of white corundum abrasive, 30-40 parts of silicon carbide abrasive, 15-20 parts of phenolic resin, 5-15 parts of potassium hexaluminate, 2-5 parts of calcium sulfate whisker and 0.4-0.6 part of coupling agent.
2. The resin grinding wheel for cutting and disassembling reinforced concrete according to claim 1, which is prepared from the following raw materials in parts by weight: 63 parts of white corundum abrasive, 37 parts of silicon carbide abrasive, 19 parts of phenolic resin, 10 parts of potassium hexaluminate, 4 parts of calcium sulfate whisker and 0.5 part of coupling agent.
3. The resin grinding wheel for cutting and disassembling reinforced concrete according to any one of claims 1 or 2, wherein the phenolic resin is composed of phenolic resin liquid and phenolic resin powder, and the weight ratio of the phenolic resin liquid to the phenolic resin powder is 1: 1-3, wherein the phenolic resin powder comprises thermosetting phenolic resin powder and thermoplastic phenolic resin powder, and the weight ratio of the thermosetting phenolic resin powder to the thermoplastic phenolic resin powder is 7: 3.
4. the resin grinding wheel for cutting and dismantling of reinforced concrete according to claim 1, wherein said coupling agent is KH550 silane coupling agent.
5. The method for preparing the resin grinding wheel for cutting and dismantling reinforced concrete as claimed in claim 1, wherein the method for preparing comprises the steps of:
(1) mixing materials: uniformly mixing a white corundum abrasive, a silicon carbide abrasive, phenolic resin, potassium hexachlorophtalate, calcium sulfate whiskers and a coupling agent to obtain a mixture;
(2) molding: putting the mixture obtained in the step (1) and the glass fiber mesh into a die cavity in sequence, and pressing under 14 MPa to obtain a semi-finished product;
(3) and curing the semi-finished product.
6. The method for preparing the resin grinding wheel for cutting and dismantling reinforced concrete according to claim 5, wherein in the step (1), the white corundum abrasive is pretreated, and the pretreatment step is as follows: and fully mixing the white corundum abrasive with the sodium silicate aqueous solution, adding zirconia powder, fully mixing, and baking at the temperature of 900-950 ℃ for 20-40 minutes.
7. The method for preparing a resin grinding wheel for cutting and dismantling reinforced concrete according to claim 6, wherein in the step (1), the amount of sodium silicate is 1.0-1.5% by weight of the white corundum abrasive, and the amount of zirconia powder is 0.8-1.2% by weight of the white corundum abrasive.
8. The method for preparing the resin grinding wheel for cutting and disassembling the reinforced concrete according to claim 5, wherein in the step (2), the glass fiber mesh and the mixture are sequentially added in the following order: glass fiber mesh, mixture, glass fiber mesh.
9. The method for preparing a resin grinding wheel for cutting and dismantling reinforced concrete according to claim 7, wherein in the step (3), the temperature rise curve of the semi-finished product during curing is as follows: zone 1, 70 ℃; zone 2, 72 ℃; zone 3, 75 ℃; zone 4, 75 ℃; zone 5, 80 ℃; zone 6, 85 ℃; zone 7, 90 ℃; zone 10, 100 ℃; zone 11, 112 ℃; zone 12, 120 ℃; zone 13, 128 ℃; zone 14, 1338 ℃; zone 15, 148 ℃; zone 16, 160 ℃; zone 17, 170 ℃; zone 18, 180 ℃; zone 19, 182 ℃; zone 20, 182 ℃; zone 21, 182 ℃; zone 22, 182 ℃; zone 23, 182 ℃; zone 24, 182 ℃; zone 25, 182 ℃; zone 26, 182 ℃; zone 27, 175 ℃; each temperature zone was held for 1 hour.
10. Use of the resin grinding wheel for cutting and dismantling reinforced concrete according to claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111392842.2A CN114083449A (en) | 2021-11-23 | 2021-11-23 | Resin grinding wheel for cutting and disassembling reinforced concrete and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111392842.2A CN114083449A (en) | 2021-11-23 | 2021-11-23 | Resin grinding wheel for cutting and disassembling reinforced concrete and preparation method and application thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814761A (en) * | 2012-07-31 | 2012-12-12 | 安徽威铭耐磨材料有限公司 | White corundum resin grinding wheel and preparation method thereof |
| CN104669131A (en) * | 2015-02-16 | 2015-06-03 | 江西峰竺新材料科技有限公司 | Calcium sulfate whisker reinforced resin grinding wheel and preparation method thereof |
| CN107336146A (en) * | 2017-09-03 | 2017-11-10 | 东莞市金利威磨料磨具有限公司 | A kind of formula and processing method of antidamping resin thin slice grinding wheel |
| 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 |
-
2021
- 2021-11-23 CN CN202111392842.2A patent/CN114083449A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814761A (en) * | 2012-07-31 | 2012-12-12 | 安徽威铭耐磨材料有限公司 | White corundum resin grinding wheel and preparation method thereof |
| CN104669131A (en) * | 2015-02-16 | 2015-06-03 | 江西峰竺新材料科技有限公司 | Calcium sulfate whisker reinforced resin grinding wheel and preparation method thereof |
| CN107336146A (en) * | 2017-09-03 | 2017-11-10 | 东莞市金利威磨料磨具有限公司 | A kind of formula and processing method of antidamping resin thin slice grinding wheel |
| 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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