CN102554811B - Method for preparing grinding wheel according to wet method - Google Patents
Method for preparing grinding wheel according to wet method Download PDFInfo
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- CN102554811B CN102554811B CN201010618285.7A CN201010618285A CN102554811B CN 102554811 B CN102554811 B CN 102554811B CN 201010618285 A CN201010618285 A CN 201010618285A CN 102554811 B CN102554811 B CN 102554811B
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Abstract
The invention belongs to the technical field of grinding wheel preparation and particularly relates to a method for preparing a grinding wheel according to a wet method. The method comprises the following steps: respectively adding powder glue, water, starch, binder, foaming agent and curing agent in proportion at different time, and then controlling the stirring speed, temperature and pouring speed in different preparing steps. The method provided by the invention has the advantages of simple technology and production equipment; the prepared grinding wheel is uniform in pore size and distribution; the mechanical strength, the abrasive resistance and the grinding property of the grinding wheel are greatly increased; and especially, the maximum porosity can reach 75%.
Description
Technical field
The present invention relates to emery wheel manufacturing technology processed field, particularly a kind of wet method is prepared the method for emery wheel.
Technical background
The preparation method of tradition silicon carbide grinding wheel, is generally dry preparation process, is about to that abrasive material, bonding agent, wetting agent, binding agent mix, sieve, moulding, sintering, processing make.For example China Patent No. is ZL90109282, disclose a kind of manufacture method of the silicon carbide grinding wheel that has improved bonding agent, mainly at 1320 ℃～1370 ℃, to carry out sintering again after the materials such as boron glass 13%～20%, clay 20%～30%, feldspar 50%～65%, fusing binder are mixed, but traditional method is because needs pass through high temperature sintering, easily produce evil mind, percent defective is higher.
Along with the development of technology, in order to boost productivity, people work out a kind of method high temperature sintering, that prepare emery wheel that do not need gradually; For example Japan Patent JP316204, a kind of manufacture method of resinoid bonded wheel is disclosed, it is to utilize phenolic resin adhesive to fix the manufacture method of leachy resinoid bonded wheel in the tissue of abrasive particle, comprises step: abrasive particle, phenolic resin adhesive, water and blowing agent are mixed equably; Then add curing accelerator, mix equably; The fluidity mixture obtaining is poured in the mold of regulation, utilizes the effect of this curing accelerator to solidify; Then from the firming body obtaining, removing moisture is dried.Although the relative conventional method of the method, has abandoned generation evil mind, the shortcoming that percent defective is higher, still comes with some shortcomings.
Grind and cut and abrasive wheel for grinding, according to the kind of used binding agent, can roughly be divided into vitrified bonded grinding wheel, resin bond wheel, metal bonded wheel and electrode deposition emery wheel.Wherein, from the reason of grinding efficiency and grinding effect use, consider mostly to use resin bond wheel.The organic bond using as resin bond wheel generally has phenolic resins, epoxy resin, polyvinyl alcohol, polyurethane resin, melmac etc.; And use in the market maximum, it is bakelite bonded wheel.
Bakelite bonded wheel generally carries out extrusion forming manufacture by material blends being filled in the mold of regulation, general first pulverous phenolic resins mixing with abrasive material, then under dry powder, fill, also have and in liquid phenolic resin, add abrasive material to mix, then adopt moulding by casting to be prepared.
During emery wheel is produced, the sharp property when improving grinding, further improves the cutting ability while grinding, and just requires emery wheel porous words, improves porosity.The general grinding chip producing in attrition process process is easy to be attracted in the pore of emery wheel, if porosity is low, is easy to cause pore to stop up, and reduces the grinding performance of emery wheel; If increase substantially the porosity of emery wheel, can prevent pore clogging, thereby improve grinding performance.
But, adopting the emery wheel production method of general extrusion forming, the porosity maximum of bakelite bonded wheel also, just in 50% left and right, wants further to improve porosity, guarantees that again other aspect of performances are constant, and conventional method is difficult to realize.
For the problems referred to above, domestic also have a correlative study, as the wet-mixing production technology of liquid phenolic resin, is to add surfactant in batch mixing process on the one hand, increases number of bubbles in mixed system; Be to utilize to be heating and curing in process on the other hand, making moisture evaporation produce pore increases porosity.
But, mix and blend and surfactant produce pore and are subject to the impact of mobility, viscosity and stirring intensity of mixed system larger, and above various factors cannot quantitatively be controlled, and the bubble producing is unstable again, therefore causes last gas cell distribution and the size forming all inhomogeneous; In addition, because phenolic resin curing temperature is higher, moisture evaporation is very fast, and pore forms also irregular, also easily makes product crack simultaneously.
Summary of the invention
The invention provides a kind of wet method and prepare the method for emery wheel, the method not only technique is simple, and can prepare the emery wheel that porosity is larger.
To achieve the above object, technical scheme of the present invention is:
Wet method is prepared a method for emery wheel, comprises and is prepared as follows step:
Steps A, count by weight percentage, 30%～50% powder glue, 10%～25% starch, 1%～5% binding agent, 0.1%～0.5% blowing agent and water are placed in reactor and stir and mix for 20～40 minutes, mixing speed is: 400～600 revs/min, obtain compounding substances I;
Step B, by standing 7～10 minutes of gained compounding substances I in steps A;
Step C, in reactor, add carborundum again, the compounding substances I in reactor and the weight ratio of carborundum are 1.2～2 ︰ 1; Stir and mix for 20～40 minutes, mixing speed is: 400～600 revs/min, obtain compounding substances II;
Step D, in reactor, add 3%～8% curing agent again, stir and mix for 10～25 minutes, mixing speed is: 300～450 revs/min, obtain compounding substances III;
Step e, by obtaining compounding substances III in step D, pour into a mould, the duration of pouring, control was 5～20 minutes;
Step F, the mould that is cast with compounding substances III is solidified for the first time, be cured as for the first time 20 ℃～40 ℃;
After step G, first solidifying, solidify for the second time, solidification temperature is 60 ℃～80 ℃ for the second time;
Step H, taking-up make finished product.
Preferably, the starch using in described steps A is the one or more combination thing in rice starch, little rice starch, cornstarch, starch from sweet potato, potato starch.
Preferably, the binding agent using in described steps A is Lauxite.
Preferably, the blowing agent using in described steps A is the one or more combination thing in polyurethane resin, polyvinyl alcohol, polyvinyl acetal resin.
Preferably, the curing agent using in described step D is faintly acid curing agent, and the concentration of volume percent of described curing agent is 0.1%～0.5%.
Preferably, faintly acid curing agent described in described step D is the one or more combination thing in oxalic acid, citric acid, acetic acid, ammonium chloride, amino acid, tartaric acid, malic acid, citric acid, benzoic acid, salicylic acid.
The object of the invention is to solve following problem:
(1), be to utilize special resin and special mixing apparatus, the pore under normal temperature environment in fixed system, provides and can make gas cell distribution and the uniform resin bond wheel production technology of size.
(2), be resin reinforcing agent and regelate principle, be provided for improving the emery wheel production technology of product mechanical strength and good grinding performance.
As the method that solves problem (1), be to find to replace by utilizing special resin to generate bubble under specific environment the technology of in the past utilizing mix and blend to generate bubble, can produce all uniform resin bond wheels of gas cell distribution and size.
This foaming technique is to interact under specific environment by blowing agent and adjuvant, forms stable bubble, and the pore size that makes the last moulding of resin bond wheel be is all even with distribution.
As the method that solves problem (2), that curing mechanical strength is all inadequate at normal temperatures for the general resin of discovery, therefore consider to add curing accelerator, reinforcing agent to carry out regelate in system, can further improve mechanical strength, anti-wear performance and the grinding performance of emery wheel.
Generally speaking, production method of the present invention is to utilize resinoid bond, has fixed the production technology of the pore in abrasive material and system, and its basic production flow process is first resinoid bond, inserts, blowing agent, adjuvant and water to be mixed uniformly; Then add abrasive material, curing agent, curing accelerator, reinforcing agent to mix; The flowing mixture obtaining is poured in the mould of regulation and carries out normal temperature cure, then the firming body after curing molding is strengthened curingly, remove wherein most of moisture simultaneously, finally form porous resin binding agent sand wheel.
The problem solving according to the present invention has advantage compared with conventional art:
A, under normal temperature environment, solidify just one-step forming, prevent the phenomenon that emery wheel cracks in the evaporation of hot setting process large quantity of moisture; Reduce the shrinkage factor of resin wheel in hot setting process, also reduced the danger that emery wheel cracks simultaneously.
B, by special resin foaming technique, form uniform and stable bubble, more easily regulate pore opening and pore amount with common being uniformly mixed compared with foaming.
C, the pore that produces size and be evenly distributed that can be stable, the uniformity of emery wheel system and intensity all increase compared with conventional art, improve anti-wear performance and the cutting ability of emery wheel simultaneously, and especially the porosity reaches as high as 75%.
concrete embodiment
Embodiment 1
Wet method is prepared a method for emery wheel, comprises and is prepared as follows step:
Steps A, count by weight percentage, 30% powder glue, 10% rice starch, 1% Lauxite, 0.1% polyethylene alcohol and water are placed in reactor and stir and mix for 20 minutes, mixing speed is: 400 revs/min, obtain compounding substances I;
Step B, by standing 7 minutes of gained compounding substances I in steps A;
Step C, in reactor, add carborundum again, the compounding substances I in reactor and the weight ratio of carborundum are 1.2 ︰ 1; Stir and mix for 20 minutes, mixing speed is: 400 revs/min, obtain compounding substances II;
Step D, in reactor, add 3% curing agent (curing agent is: oxalic acid) again, the concentration of volume percent of described curing agent is 0.1%; Stir and mix for 10 minutes, mixing speed is: 300 revs/min, obtain compounding substances III;
Step e, by obtaining compounding substances III in step D, pour into a mould, the duration of pouring, control was 5 minutes;
Step F, the mould that is cast with compounding substances III is solidified for the first time, be cured as for the first time 20 ℃;
After step G, first solidifying, solidify for the second time, solidification temperature is 60 ℃ for the second time;
Step H, taking-up make finished product.
Embodiment 2
Wet method is prepared a method for emery wheel, comprises and is prepared as follows step:
Steps A, count by weight percentage, by 35% powder glue, 15% potato starch, 2% Lauxite, 0.2% polyurethane resin and water, be placed in reactor and stir and mix for 25 minutes, mixing speed is: 450 revs/min, obtain compounding substances I;
Step B, by standing 8 minutes of gained compounding substances I in steps A;
Step C, in reactor, add carborundum again, the compounding substances I in reactor and the weight ratio of carborundum are 1.4 ︰ 1; Stir and mix for 25 minutes, mixing speed is: 450 revs/min, obtain compounding substances II;
Step D, in reactor, add 4% acetic acid again, the concentration of volume percent of described acetic acid is 0.3%; Stir and mix for 18 minutes, mixing speed is: 380 revs/min, obtain compounding substances III;
Step e, by obtaining compounding substances III in step D, pour into a mould, the duration of pouring, control was 12 minutes;
Step F, the mould that is cast with compounding substances III is solidified for the first time, be cured as for the first time 35 ℃;
After step G, first solidifying, solidify for the second time, solidification temperature is 50 ℃ for the second time;
Step H, taking-up make finished product.
Embodiment 3
Wet method is prepared a method for emery wheel, comprises and is prepared as follows step:
Steps A, count by weight percentage, by 42% powder glue, 10% starch (wherein, comprise 2% little rice starch, 2% cornstarch and 6% starch from sweet potato), 3% Lauxite, 0.2% polyvinyl acetal resin and water is placed in reactor and stirs and mix for 32 minutes, mixing speed is: 500 revs/min, obtain compounding substances I;
Step B, by standing 8 minutes of gained compounding substances I in steps A;
Step C, in reactor, add carborundum again, the compounding substances I in reactor and the weight ratio of carborundum are 1.6 ︰ 1; Stir and mix for 30 minutes, mixing speed is: 550 revs/min, obtain compounding substances II;
Step D, in reactor, add 5% curing agent (wherein, comprising the citric acid of 2% malic acid and 3%) again, the concentration of volume percent of described curing agent is 0.2%; Stir and mix for 12 minutes, mixing speed is: 3200 revs/min, obtain compounding substances III;
Step e, by obtaining compounding substances III in step D, pour into a mould, the duration of pouring, control was 7 minutes;
Step F, the mould that is cast with compounding substances III is solidified for the first time, be cured as for the first time 25 ℃;
After step G, first solidifying, solidify for the second time, solidification temperature is 70 ℃ for the second time;
Step H, taking-up make finished product.
Embodiment 4
Wet method is prepared a method for emery wheel, comprises and is prepared as follows step:
Steps A, count by weight percentage, by 45% powder glue, 20% starch (wherein, comprise the potato starch of 15% cornstarch and 5%), 2% Lauxite, 0.1% polyvinyl alcohol, 0.2% polyvinyl acetal resin and water be placed in reactor and stir and mix for 25 minutes, mixing speed is: 420 revs/min, obtain compounding substances I;
Step B, by standing 8 minutes of gained compounding substances I in steps A;
Step C, in reactor, add carborundum again, the compounding substances I in reactor and the weight ratio of carborundum are 1.8 ︰ 1; Stir and mix for 38 minutes, mixing speed is: 550 revs/min, obtain compounding substances II;
Step D, in reactor, add 3% oxalic acid again, the concentration of volume percent of described oxalic acid is 0.4%; Stir and mix for 22 minutes, mixing speed is: 420 revs/min, obtain compounding substances III;
Step e, by obtaining compounding substances III in step D, pour into a mould, the duration of pouring, control was 15 minutes;
Step F, the mould that is cast with compounding substances III is solidified for the first time, be cured as for the first time 20 ℃;
After step G, first solidifying, solidify for the second time, solidification temperature is 70 ℃ for the second time;
Step H, taking-up make finished product.
Embodiment 5
Wet method is prepared a method for emery wheel, comprises and is prepared as follows step:
Steps A, count by weight percentage, 50% powder glue, 25% rice starch, 5% Lauxite, 0.5% blowing agent (comprising 0.2% polyurethane resin, 0.1% polyvinyl alcohol and 0.2% polyvinyl acetal resin) and water are placed in reactor and stir and mix for 40 minutes, mixing speed is: 600 revs/min, obtain compounding substances I;
Step B, by standing 10 minutes of gained compounding substances I in steps A;
Step C, in reactor, add carborundum again, the compounding substances I in reactor and the weight ratio of carborundum are 2 ︰ 1; Stir and mix for 40 minutes, mixing speed is: 600 revs/min, obtain compounding substances II;
Step D, again toward adding 8% curing agent (wherein, the oxalic acid containing 1%, 1% citric acid and 8% salicylic acid) in reactor, the concentration of volume percent of described curing agent is 0.5%; Stir and mix for 25 minutes, mixing speed is: 450 revs/min, obtain compounding substances III;
Step e, by obtaining compounding substances III in step D, pour into a mould, the duration of pouring, control was 20 minutes;
Step F, the mould that is cast with compounding substances III is solidified for the first time, be cured as for the first time 40 ℃;
After step G, first solidifying, solidify for the second time, solidification temperature is 80 ℃ for the second time;
Step H, taking-up make finished product.
Above-described embodiment, is preferred embodiment of the present invention, is not used for limiting the scope of the present invention, and the equivalence of being done with the feature described in the claims in the present invention and principle therefore all changes or modifies, within all should being included in the claims in the present invention scope.
Claims (6)
1. wet method is prepared a method for emery wheel, it is characterized in that, comprises and is prepared as follows step:
Steps A, count by weight percentage, 30%～50% powder glue, 10%～25% starch, 1%～5% binding agent, 0.1%～0.5% blowing agent and water are placed in reactor and stir and mix for 20～40 minutes, mixing speed is: 400～600 revs/min, obtain compounding substances I;
Step B, by standing 7～10 minutes of gained compounding substances I in steps A;
Step C, in reactor, add carborundum again, the compounding substances I in reactor and the weight ratio of carborundum are 1.2～2 ︰ 1; Stir and mix for 20～40 minutes, mixing speed is: 400～600 revs/min, obtain compounding substances II;
Step D, in reactor, add 3%～8% curing agent again, stir and mix for 10～25 minutes, mixing speed is: 300～450 revs/min, obtain compounding substances III;
Step e, by obtaining compounding substances III in step D, pour into a mould, the duration of pouring, control was 5～20 minutes;
Step F, the mould that is cast with compounding substances III is solidified for the first time, be cured as for the first time 20 ℃～40 ℃;
After step G, first solidifying, solidify for the second time, solidification temperature is 60 ℃～80 ℃ for the second time;
Step H, taking-up make finished product.
2. wet method is prepared the method for emery wheel according to claim 1, it is characterized in that, the starch using in described steps A is the one or more combination thing in rice starch, little rice starch, cornstarch, starch from sweet potato, potato starch.
3. wet method is prepared the method for emery wheel according to claim 1, it is characterized in that, the binding agent using in described steps A is Lauxite.
4. wet method is prepared the method for emery wheel according to claim 1, it is characterized in that, the blowing agent using in described steps A is the one or more combination thing in polyurethane resin, polyvinyl alcohol, polyvinyl acetal resin.
5. wet method is prepared the method for emery wheel according to claim 1, it is characterized in that, the curing agent using in described step D is faintly acid curing agent, and the concentration expressed in percentage by volume of described curing agent is 0.1%～0.5%.
6. wet method is prepared the method for emery wheel according to claim 5, it is characterized in that, described faintly acid curing agent is the one or more combination thing in oxalic acid, citric acid, acetic acid, ammonium chloride, amino acid, tartaric acid, malic acid, citric acid, benzoic acid, salicylic acid.
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| CN103144048A (en) * | 2013-02-20 | 2013-06-12 | 应永武 | Angle grinding wheel and preparation method thereof |
| CN103395011B (en) * | 2013-07-30 | 2016-08-10 | 华南理工大学 | Polyvinyl alcohol-elastic polyurethane buffing wheel and preparation method thereof |
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| CN107116485B (en) * | 2017-06-07 | 2019-04-16 | 广州捷骏电子科技有限公司 | A kind of manufacturing method of expansion type porous grinding wheel |
| CN107344337B (en) * | 2017-08-11 | 2019-09-03 | 南平市亿泽磨料磨具科技有限公司 | A kind of depth viscosity mixed coating corundum abrasive |
| CN109048697B (en) * | 2018-08-30 | 2019-10-01 | 郑州磨料磨具磨削研究所有限公司 | A kind of preseptum to put the first edge on a knife or a pair of scissors for saw blade, preparation method and application |
| CN113199415B (en) * | 2021-05-19 | 2023-11-03 | 万峰石材科技股份有限公司 | Artificial stone mirror polishing grinding tool and preparation method thereof |
| CN113321941A (en) * | 2021-07-06 | 2021-08-31 | 刘永忠 | Foaming method of high-efficiency grinding head |
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| CN1063437A (en) * | 1990-12-20 | 1992-08-12 | 辛辛那提米勒克朗公司 | Make the method and the prepared emery wheel of vitrified bonded grinding wheel |
| WO2001085394A1 (en) * | 2000-05-10 | 2001-11-15 | Noritake Co., Limited | Porous phenol resin grindstone and method for its preparation |
| CN1411403A (en) * | 1999-12-21 | 2003-04-16 | 3M创新有限公司 | Abrasive material having abrasive layer of three-dimensional structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6440185B2 (en) * | 1997-11-28 | 2002-08-27 | Noritake Co., Ltd. | Resinoid grinding wheel |
| JP2005230983A (en) * | 2004-02-20 | 2005-09-02 | Kurenooton Kk | Method of manufacturing resinoid grinding wheel |
| JP4854269B2 (en) * | 2005-10-31 | 2012-01-18 | クレトイシ株式会社 | Resinoid grinding wheel manufacturing method |
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| CN1063437A (en) * | 1990-12-20 | 1992-08-12 | 辛辛那提米勒克朗公司 | Make the method and the prepared emery wheel of vitrified bonded grinding wheel |
| CN1411403A (en) * | 1999-12-21 | 2003-04-16 | 3M创新有限公司 | Abrasive material having abrasive layer of three-dimensional structure |
| WO2001085394A1 (en) * | 2000-05-10 | 2001-11-15 | Noritake Co., Limited | Porous phenol resin grindstone and method for its preparation |
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Free format text: FORMER OWNER: ZHANG GUIMING Effective date: 20150819 Owner name: ZHANG GUIMING Free format text: FORMER OWNER: DONGGUAN CHANGJIN GRAVURE MOULD CO., LTD. Effective date: 20150819 |
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Effective date of registration: 20150819 Address after: East Industrial Park Changping town Guangdong city Dongguan province 523577 Patentee after: Zhang Guiming Address before: The town of Changping city of Dongguan province Guangdong 523577 East Industrial Park Hexi Industrial Zone Dongguan Changjin gravure mould Co. Ltd. Patentee before: Dongguan Changjin Gravure Mould Co., Ltd. Patentee before: Zhang Guiming |
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Effective date of registration: 20170412 Address after: 523557 Guangdong, Dongguan City, Changping Town, Shahu village, St. Mark Road, building 1-2, A floor, No. 2 Co-patentee after: Zhang Guiming Patentee after: Dongguan pulse Surface Treatment Technology Co., Ltd. Address before: East Industrial Park Changping town Guangdong city Dongguan province 523577 Patentee before: Zhang Guiming |