CN102554811A - 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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- CN102554811A CN102554811A CN2010106182857A CN201010618285A CN102554811A CN 102554811 A CN102554811 A CN 102554811A CN 2010106182857 A CN2010106182857 A CN 2010106182857A CN 201010618285 A CN201010618285 A CN 201010618285A CN 102554811 A CN102554811 A CN 102554811A
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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 make emery wheel manufacturing technology field, particularly a kind of wet method prepares 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, bond, wetting agent, binding agent mix, sieve, moulding, sintering, processing make.For example Chinese patent number is ZL90109282; A kind of manufacturing approach of having improved the silicon carbide grinding wheel of bond is just disclosed; Mainly be to carry out sintering at 1320 ℃～1370 ℃ again after materials such as boron glass 13%～20%, clay 20%～30%, feldspar 50%～65%, fusing binder are mixed; But traditional method is owing to need to be easy to generate evil mind through high temperature sintering, and 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; Japan Patent JP316204 for example; A kind of manufacturing approach of resinoid bonded wheel is disclosed; It is to utilize phenolic resin adhesive to fix the manufacturing approach 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; Add curing accelerator then, mix equably; Be poured into the fluidity mixture that obtains in the mold of regulation, utilize the effect of this curing accelerator to solidify; From the firming body that obtains, remove moisture then and carry out drying.Though the relative conventional method of this method has been abandoned the generation evil mind, the shortcoming that percent defective is higher still comes with some shortcomings.
Grind to cut and grind and use emery wheel, can roughly be divided into vitrified bonded grinding wheel, resin bond wheel, metal bonded wheel and electrode deposition emery wheel according to the kind of use binding agent.Wherein, consider to use mostly resin bond wheel from the reason of grinding efficiency and grinding effect use.The organic bond that uses as resin bond wheel generally has phenolic resins, epoxy resin, polyvinyl alcohol, polyurethane resin, melmac etc.; And use maximum in the market is bakelite bonded wheel.
Bakelite bonded wheel is generally through carrying out the extrusion forming manufacturing in the mold that material blends is filled in regulation; The general mixing pulverous phenolic resins with abrasive material earlier; Fill under the dry powder then; Also there is in liquid phenolic resin the abrasive material of adding mix, adopts moulding by casting to prepare then.During emery wheel was produced, the sharp property when improving grinding promptly further improved the cutting ability when grinding, and just requires emery wheel porous words, improves porosity.The general grinding chip that in the attrition process process, produces is easy to be attracted in the pore of emery wheel, if porosity is low, then is easy to cause pore to stop up, and reduces the grinding performance of emery wheel; If increase substantially the porosity of emery wheel, then can prevent the pore clogging, thereby improve grinding performance.
Yet, adopting the emery wheel production method of general extrusion forming, the porosity maximum of bakelite bonded wheel also just about 50%, wants further to improve porosity, guarantees that again other aspect of performances are constant, and conventional method is difficult to realize.
To the problems referred to above, domestic also have a correlative study, like the wet-mixed production technology of liquid phenolic resin, is in the batch mixing process, to add surfactant on the one hand, increases number of bubbles in the mixed system; Be to utilize in the process that is heating and curing on the other hand, making water evaporates produce pore increases porosity.
Yet; Mix to stir and surfactant produces pore and receives the influence of flowability, viscosity and stirring intensity of mixed system bigger; And above various factors can't quantitatively be controlled, and the bubble that produces is unstable again, therefore causes last gas cell distribution and the size that forms all inhomogeneous; In addition, because the phenolic resin curing temperature is higher, water evaporates is very fast, and pore forms also irregular, and product is cracked.
Summary of the invention
The invention provides the method that a kind of wet method prepares emery wheel, this method not only technology is simple, and can prepare porosity on big emery wheel.
In order to reach above-mentioned purpose, technical scheme of the present invention is:
A kind of wet method prepares the method for emery wheel, comprises being prepared as follows step:
Steps A, count by weight percentage; Powder glue with 30%～50%, 10%～25% starch, 1%～5% binding agent, 0.1%～0.5% blowing agent and water place to stir in the reactor and mixed in 20～40 minutes; Mixing speed is: 400～600 rev/mins, obtain compounding substances I;
Step B, gained compounding substances I in the steps A was left standstill 7～10 minutes;
Step C, add carborundum in the reactor again, the compounding substances I in the reactor and the weight ratio of carborundum are 1.2～2: 1; Stir and mixed in 20～40 minutes, mixing speed is: 400～600 rev/mins, obtain compounding substances II;
Step D, add 3%～8% curing agent in the reactor again, stir and mixed in 10～25 minutes, mixing speed is: 300～450 rev/mins, obtain compounding substances III;
Step e, pour into a mould, be controlled to be 5～20 minutes the duration of pouring obtaining compounding substances III among the step D;
Step F, the mould that will be cast with compounding substances III solidify for the first time, are cured as 20 ℃～40 ℃ for the first time;
Behind step G, the first curing, carry out solidifying the second time, solidification temperature is 60 ℃～80 ℃ for the second time;
Step H, taking-up make finished product.
Preferably, employed starch is the one or more combination thing in rice starch, little rice starch, cornstarch, starch from sweet potato, the potato starch in the said steps A.
Preferably, employed binding agent is a Lauxite in the said steps A.
Preferably, employed blowing agent is the one or more combination thing in polyurethane resin, polyvinyl alcohol, the polyvinyl acetal resin in the said steps A.
Preferably, employed curing agent is the faintly acid curing agent among the said step D, and the concentration of volume percent of said curing agent is 0.1%～0.5%.
Preferably, faintly acid curing agent described in the said step D is the one or more combination thing in oxalic acid, citric acid, acetic acid, ammonium chloride, amino acid, tartaric acid, oxalic acid, malic acid, citric acid, benzoic acid, the salicylic acid.
The object of the invention is to solve following problem:
(1), be to utilize special resin and special-purpose mixing apparatus, the pore under normal temperature environment in the fixed system provides to 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 for solution problem (1), be to find to replace utilizing the technology of mixing stirring generation bubble through utilizing special resin under specific environment, to generate bubble in the past, can produce all uniform resin bond wheel of gas cell distribution and size.
This foaming technique is to interact under specific environment through blowing agent and assistant, 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); Be that to find that general resin solidifies mechanical strength at normal temperatures all not enough; So consideration adds curing accelerator in system, reinforcing agent carries out regelate, 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 the system, and its basic production flow process is earlier resinoid bond, inserts, blowing agent, assistant and water to be mixed uniformly; Adding abrasive material, curing agent, curing accelerator, reinforcing agent then mixes; Be poured into the flowing mixture that obtains in the mould of regulation and carry out normal temperature cure, strengthen curing to the firming body after the curing molding then, go out wherein most of moisture simultaneously, form the porous resin binding agent sand wheel at last.
The problem that solves according to the present invention has advantage with compared with techniques in the past:
A, under normal temperature environment, solidify one-step forming just, 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 the hot setting process, also reduced the danger that emery wheel cracks simultaneously.
B, through the special resin foaming technique, forms uniform and stable bubble, foam to compare with common mixing and regulate pore opening and pore amount more easily.
C, the pore that produces size and be evenly distributed that can be stable all increase with the uniformity and the intensity of compared with techniques emery wheel system in the past, improve the anti-wear performance and the cutting ability of emery wheel simultaneously, and especially the porosity reaches as high as 75%.
Concrete embodiment
Embodiment 1
A kind of wet method prepares the method for emery wheel, comprises being prepared as follows step:
Steps A, count by weight percentage, the powder glue with 30%, 10% rice starch, 1% Lauxite, 0.1% polyethylene alcohol and water place to stir in the reactor and mixed in 20 minutes, and mixing speed is: 400 rev/mins, obtain compounding substances I;
Step B, gained compounding substances I in the steps A was left standstill 7 minutes;
Step C, add carborundum in the reactor again, the compounding substances I in the reactor and the weight ratio of carborundum are 1.2: 1; Stir and mixed in 20 minutes, mixing speed is: 400 rev/mins, obtain compounding substances II;
Step D, (curing agent is: oxalic acid), the concentration of volume percent of said curing agent is 0.1% to add 3% curing agent in the reactor again; Stir and mixed in 10 minutes, mixing speed is: 300 rev/mins, obtain compounding substances III;
Step e, pour into a mould, be controlled to be 5 minutes the duration of pouring obtaining compounding substances III among the step D;
Step F, the mould that will be cast with compounding substances III solidify for the first time, are cured as 20 ℃ for the first time;
Behind step G, the first curing, carry out solidifying the second time, solidification temperature is 60 ℃ for the second time;
Step H, taking-up make finished product.
Embodiment 2
A kind of wet method prepares the method for emery wheel, comprises being prepared as follows step:
Steps A, count by weight percentage; Powder glue with 35%, 15% potato starch, 2% Lauxite, 0.2% polyurethane resin and water; Place to stir in the reactor and mixed in 25 minutes, mixing speed is: 450 rev/mins, obtain compounding substances I;
Step B, gained compounding substances I in the steps A was left standstill 8 minutes;
Step C, add carborundum in the reactor again, the compounding substances I in the reactor and the weight ratio of carborundum are 1.4: 1; Stir and mixed in 25 minutes, mixing speed is: 450 rev/mins, obtain compounding substances II;
Step D, add 4% acetic acid in the reactor again, the concentration of volume percent of said acetic acid is 0.3%; Stir and mixed in 18 minutes, mixing speed is: 380 rev/mins, obtain compounding substances III;
Step e, pour into a mould, be controlled to be 12 minutes the duration of pouring obtaining compounding substances III among the step D;
Step F, the mould that will be cast with compounding substances III solidify for the first time, are cured as 35 ℃ for the first time;
Behind step G, the first curing, carry out solidifying the second time, solidification temperature is 50 ℃ for the second time;
Step H, taking-up make finished product.
Embodiment 3
A kind of wet method prepares the method for emery wheel, comprises being prepared as follows step:
Steps A, count by weight percentage; Powder glue with 42%, 10% starch are (wherein; Comprise 2% little rice starch, 2% cornstarch and 6% starch from sweet potato), 3% Lauxite, 0.2% polyvinyl acetal resin and water places to stir in the reactor and mixed in 32 minutes; Mixing speed is: 500 rev/mins, obtain compounding substances I;
Step B, gained compounding substances I in the steps A was left standstill 8 minutes;
Step C, add carborundum in the reactor again, the compounding substances I in the reactor and the weight ratio of carborundum are 1.6: 1; Stir and mixed in 30 minutes, mixing speed is: 550 rev/mins, obtain compounding substances II;
Step D, add 5% curing agent (wherein, comprising the citric acid of 2% malic acid and 3%) in the reactor again, the concentration of volume percent of said curing agent is 0.2%; Stir and mixed in 12 minutes, mixing speed is: 3200 rev/mins, obtain compounding substances III;
Step e, pour into a mould, be controlled to be 7 minutes the duration of pouring obtaining compounding substances III among the step D;
Step F, the mould that will be cast with compounding substances III solidify for the first time, are cured as 25 ℃ for the first time;
Behind step G, the first curing, carry out solidifying the second time, solidification temperature is 70 ℃ for the second time;
Step H, taking-up make finished product.
Embodiment 4
A kind of wet method prepares the method for emery wheel, comprises being prepared as follows step:
Steps A, count by weight percentage; Powder glue with 45%, 20% starch are (wherein; The potato starch that comprises 15% cornstarch and 5%), 2% Lauxite, 0.1% polyvinyl alcohol, 0.2% polyvinyl acetal resin and water place to stir in the reactor and mixed in 25 minutes; Mixing speed is: 420 rev/mins, obtain compounding substances I;
Step B, gained compounding substances I in the steps A was left standstill 8 minutes;
Step C, add carborundum in the reactor again, the compounding substances I in the reactor and the weight ratio of carborundum are 1.8: 1; Stir and mixed in 38 minutes, mixing speed is: 550 rev/mins, obtain compounding substances II;
Step D, add 3% oxalic acid in the reactor again, the concentration of volume percent of said oxalic acid is 0.4%; Stir and mixed in 22 minutes, mixing speed is: 420 rev/mins, obtain compounding substances III;
Step e, pour into a mould, be controlled to be 15 minutes the duration of pouring obtaining compounding substances III among the step D;
Step F, the mould that will be cast with compounding substances III solidify for the first time, are cured as 20 ℃ for the first time;
Behind step G, the first curing, carry out solidifying the second time, solidification temperature is 70 ℃ for the second time;
Step H, taking-up make finished product.
Embodiment 5
A kind of wet method prepares the method for emery wheel, comprises being prepared as follows step:
Steps A, count by weight percentage; Powder glue with 50%, 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 place interior stirring of reactor to mix in 40 minutes; Mixing speed is: 600 rev/mins, obtain compounding substances I;
Step B, gained compounding substances I in the steps A was left standstill 10 minutes;
Step C, add carborundum in the reactor again, the compounding substances I in the reactor and the weight ratio of carborundum are 2: 1; Stir and mixed in 40 minutes, mixing speed is: 600 rev/mins, obtain compounding substances II;
Step D, add 8% curing agent (wherein, containing 1% oxalic acid, 1% citric acid and 8% salicylic acid) in the reactor again, the concentration of volume percent of said curing agent is 0.5%; Stir and mixed in 25 minutes, mixing speed is: 450 rev/mins, obtain compounding substances III;
Step e, pour into a mould, be controlled to be 20 minutes the duration of pouring obtaining compounding substances III among the step D;
Step F, the mould that will be cast with compounding substances III solidify for the first time, are cured as 40 ℃ for the first time;
Behind step G, the first curing, carry out solidifying the second time, solidification temperature is 80 ℃ for the second time;
Step H, taking-up make finished product.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting practical range of the present invention, so all equivalences of being done with described characteristic of claim of the present invention and principle change or modify, all should be included within the claim scope of the present invention.
Claims (6)
1. a wet method prepares the method for emery wheel, it is characterized in that, comprises being prepared as follows step:
Steps A, count by weight percentage; Powder glue with 30%～50%, 10%～25% starch, 1%～5% binding agent, 0.1%～0.5% blowing agent and water place to stir in the reactor and mixed in 20～40 minutes; Mixing speed is: 400～600 rev/mins, obtain compounding substances I;
Step B, gained compounding substances I in the steps A was left standstill 7～10 minutes;
Step C, add carborundum in the reactor again, the compounding substances I in the reactor and the weight ratio of carborundum are 1.2～2: 1; Stir and mixed in 20～40 minutes, mixing speed is: 400～600 rev/mins, obtain compounding substances II;
Step D, add 3%～8% curing agent in the reactor again, stir and mixed in 10～25 minutes, mixing speed is: 300～450 rev/mins, obtain compounding substances III;
Step e, pour into a mould, be controlled to be 5～20 minutes the duration of pouring obtaining compounding substances III among the step D;
Step F, the mould that will be cast with compounding substances III solidify for the first time, are cured as 20 ℃～40 ℃ for the first time;
Behind step G, the first curing, carry out solidifying the second time, solidification temperature is 60 ℃～80 ℃ for the second time;
Step H, taking-up make finished product.
2. prepare the method for emery wheel according to the said wet method of claim 1, it is characterized in that, employed starch is the one or more combination thing in rice starch, little rice starch, cornstarch, starch from sweet potato, the potato starch in the said steps A.
3. prepare the method for emery wheel according to the said wet method of claim 1, it is characterized in that employed binding agent is a Lauxite in the said steps A.
4. prepare the method for emery wheel according to the said wet method of claim 1, it is characterized in that, employed blowing agent is the one or more combination thing in polyurethane resin, polyvinyl alcohol, the polyvinyl acetal resin in the said steps A.
5. prepare the method for emery wheel according to the said wet method of claim 1, it is characterized in that employed curing agent is the faintly acid curing agent among the said step D, the concentration expressed in percentage by volume of said curing agent is 0.1%～0.5%.
6. the method for preparing emery wheel according to the said wet method of claim 2; It is characterized in that said faintly acid curing agent is the one or more combination thing in oxalic acid, citric acid, acetic acid, ammonium chloride, amino acid, tartaric acid, oxalic acid, malic acid, citric acid, benzoic acid, the salicylic acid.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103144048A (en) * | 2013-02-20 | 2013-06-12 | 应永武 | Angle grinding wheel and preparation method thereof |
| CN103395011A (en) * | 2013-07-30 | 2013-11-20 | 华南理工大学 | Polyvinyl alcohol-polyurethane elastic buffing wheel and preparation method thereof |
| CN103770020A (en) * | 2014-01-10 | 2014-05-07 | 当涂县南方红月磨具磨料有限公司 | Ceramic praseodymium neodymium corundum grinding wheel |
| CN104708542A (en) * | 2015-03-31 | 2015-06-17 | 西安科技大学 | Flexible urea resin grinding apparatus and preparation method thereof |
| CN104723226A (en) * | 2015-03-07 | 2015-06-24 | 西安科技大学 | Preparation method of foam resin grinding wheel |
| CN107116485A (en) * | 2017-06-07 | 2017-09-01 | 广州立启森科技有限公司 | A kind of manufacture method of expansion type porous grinding wheel |
| CN107344337A (en) * | 2017-08-11 | 2017-11-14 | 南平市亿泽磨料磨具科技有限公司 | A kind of deep viscosity mixed coating corundum abrasive |
| CN109048697A (en) * | 2018-08-30 | 2018-12-21 | 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 |
| CN113199415A (en) * | 2021-05-19 | 2021-08-03 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103144048A (en) * | 2013-02-20 | 2013-06-12 | 应永武 | Angle grinding wheel and preparation method thereof |
| CN103395011A (en) * | 2013-07-30 | 2013-11-20 | 华南理工大学 | Polyvinyl alcohol-polyurethane elastic buffing wheel and preparation method thereof |
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| CN104708542A (en) * | 2015-03-31 | 2015-06-17 | 西安科技大学 | Flexible urea resin grinding apparatus and preparation method thereof |
| CN107116485A (en) * | 2017-06-07 | 2017-09-01 | 广州立启森科技有限公司 | A kind of manufacture method of expansion type porous grinding wheel |
| CN107344337A (en) * | 2017-08-11 | 2017-11-14 | 南平市亿泽磨料磨具科技有限公司 | A kind of deep viscosity mixed coating corundum abrasive |
| 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 |
| CN109048697A (en) * | 2018-08-30 | 2018-12-21 | 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 |
| 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 |
| CN113199415A (en) * | 2021-05-19 | 2021-08-03 | 万峰石材科技股份有限公司 | Artificial stone mirror polishing grinding tool and preparation method thereof |
| 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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| CN102554811B (en) | 2014-04-16 |
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