CN106670986A - High-porosity ceramic binder CBN grinding wheel - Google Patents
High-porosity ceramic binder CBN grinding wheel Download PDFInfo
- Publication number
- CN106670986A CN106670986A CN201510756434.9A CN201510756434A CN106670986A CN 106670986 A CN106670986 A CN 106670986A CN 201510756434 A CN201510756434 A CN 201510756434A CN 106670986 A CN106670986 A CN 106670986A
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- Prior art keywords
- cbn
- grinding wheel
- slurry
- wheel
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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
- B24D3/04—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 inorganic
- B24D3/14—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 inorganic ceramic, i.e. vitrified bondings
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/04—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by dissolving-out added substances
Abstract
The invention discloses a high-porosity ceramic binder CBN grinding wheel prepared through a stripping process and a manufacturing method for the high-porosity ceramic binder CBN grinding wheel. The manufacturing method comprises the following steps of: uniformly mixing a CBN abrasive material, deionized water, boron glass powder, bismuth trioxide powder, cryolite powder, potassium feldspar powder, potassium nitrate, corn starch and polyethylene glycol in certain proportion, and performing water-bath heating at a temperature of 80 DEG C to obtain high-dispersion slurry; drying the slurry and adding a little water to uniformly mix with the slurry to obtain a grinding wheel forming material; and performing dry-pressing and forming on the forming material under pressure of 50-70 MPa to obtain a CBN grinding wheel, and machining the grinding wheel while sintering at a temperature of 650-700 DEG C; and completely soaking the grinding wheel into pure water for one hour after machining, taking out the CBN grinding wheel, and flushing the CBN grinding wheel with deionized water until the CBN grinding wheel is neutral. The qualified high-porosity ceramic binder CBN grinding wheel is obtained, and the problem that the ceramic binder CBN grinding wheel which has porosity higher than 60% and is good in degree of sphericity of pores is difficult to manufacture is solved.
Description
Technical field
The invention of this reality is related to a kind of leaching and prepares high porosity Vitrified Bond CBN Grinding Wheel and its preparation technology,
Especially can produce volumetric porosity and reach 70% under conditions of higher yield rate and relatively low cost
More than, and the preferable Vitrified Bond CBN Grinding Wheel of pore sphericity.
Background technology
Ceramic binder cubic boron nitride (CBN) emery wheel has grinding efficiency high, and grinding force is little, and size keeps
Property it is good, grinding accuracy is high, and finishing is easy, the advantages of long service life, be widely used in cast iron, mould steel,
The form grinding of the difficult processing metals such as high-speed steel, high-alloy steel, bearing steel, hard alloy, titanium alloy
And accurate grinding.With science and technology development, the requirement more and more higher to metallic element surface quality, therefore
For the processing of high rigidity ferrous metal, for the scorch crackle and surface residual stress of workpiece require to get over
Come stricter, on the other hand, with the rising of labor cost, for CBN emery wheels grinding efficiency will
Ask and also increasingly improve.So the body of the CBN emery wheels of most of molding mill and accurate grinding high rigidity ferrous metal
Product porosity is required more than 50%, it is therefore desirable to reach more than 60%.The cutting edge of a knife or a sword of emery wheel is improved by high porosity
Sharp degree and self-sharpening, while the grinding fluid penetrated in emery wheel pore is effectively reduced grinding area temperature, prevent CBN
Emery wheel is burnt surface of the work in high-efficiency grinding, reduces the residual stress of surface of the work.At present, high hole
The preparation method of rate Vitrified Bond CBN Grinding Wheel is all to mix vitrified bond, CBN abrasive materials, pore creating material dry method
After closing uniformly, pressureless sintering.At present conventional pore former material have refined naphthalene, walnut shell powder, plastic beads,
Dextrine powder etc., in sintering process, pore creating material carbonization and oxidation leave pore in emery wheel.But on the one hand,
Such emery wheel, pore creating material addition is higher, and emery wheel biscuit intensity is very low before sintering, and pore creating material carbonization and oxygen
Change temperature and be generally below sintering temperature, before emery wheel biscuit is also un-sintered, can produce in grinding wheel organization substantial amounts of
Gas, gathers certain stress, causes emery wheel to ftracture, and finished grinding wheel rate is very low.On the other hand, in order to anti-
Only emery wheel ftractures, and the addition of pore creating material can not be too many in grinding wheel formula, therefore is difficult to prepare volume hole
Ultra-fine Vitrified Bond CBN Grinding Wheel of the rate higher than 60%, while the shape of pore is also extremely irregular, shadow
The raising of CBN wheel grinding performances is rung.
The content of the invention
The technical problem to be solved in the present invention is in view of the shortcomings of the prior art, to propose a kind of leaching
The technique for preparing high porosity Vitrified Bond CBN Grinding Wheel, obtained CBN vitrified abrasives porosity can be high
Up to more than 60%, hole shape is regular spherical, and pore size is adjustable, and emery wheel prepares yield rate up to more than 99%,
High efficient grinding processing can be carried out to high rigidity ferrous metal part, be effectively prevented metal parts in grinding
In burn.
The technical scheme is that, a kind of preparation technology of high porosity Vitrified Bond CBN Grinding Wheel
Method includes：
(1), CBN wheel ceramic slurries are prepared：
The percentage by weight composition of CBN wheel ceramic formula of size：
First measure the deionized water of proper volume, then be proportionally added into the Polyethylene Glycol of molecular weight 800, high-speed stirring
Mix 1 hour, 2000 revs/min of mixing speed, then by weight addition CBN abrasive materials, 2000 revs/min of speed
Stirring 0.5-1 hours；It is long that weighing boron glass powder, bismuth oxide powder, cryolite powder, potassium in proportion are distinguished again
Stone powder and potassium nitrate are added in slurry, and 2000 revs/min of speed stir 1.5-2.5 hours, then are proportionally added into jade
After rice starch is stirred 0.5 hour, the container equipped with slurry is put in 80 DEG C of water bath, is heated while stirring
0.5 hour, (when more than 70 DEG C, starch can be anti-with aqueous solvent generation aquation in slurry in thick-pasty for slurry
Should, slurry viscosity improves rapidly the sedimentation for desirably preventing powder), obtain the ceramic size of polymolecularity.
(2), the preparation of vitrified CBN wheel molding mass
By slurry after 120 DEG C of dryings 12 hours, material block is scooped up from container, the hand-crushed in mortar
60# sieves are crossed, the clear water of sieving materials quality 3% is then added with watering can, manual mixing 0.5-1 is little in mortar
When, after the sieves of 100# twice, in enclosing closed plastic bag, place under room temperature 24 hours, then cross 100#
Sieve, obtains the molding mass of Vitrified Bond CBN Grinding Wheel.
(3), the molding of vitrified CBN wheel
Corresponding mould is chosen according to the emery wheel specification of wanted molding, the molding mass of certain mass is weighed, is put into
In mould, extrusion forming, briquetting pressure 50-70MPa, pressurize 1 minute, release, the demoulding, after molding
Vitrified Bond CBN Grinding Wheel biscuit be placed horizontally on SiC refractory slabs, under room temperature place 24 hours after, put
Enter in 70 DEG C of baking ovens and be dried 12 hours.
(4), the sintering of Vitrified Bond CBN Grinding Wheel
The refractory slab for placing CBN emery wheels is put in shaft furnace, is warming up to the speed of 3-5 DEG C/min of heating rate
400-500 DEG C, 1-2 hours are incubated, then 650-700 DEG C are warming up to the speed of 2-4 DEG C/min of heating rate,
Insulation 1.5-2 hours, close furnace rear CBN emery wheels natural cooling in electric furnace, open when furnace temperature is less than 150 DEG C
Fire door is cooled down, and temperature takes out CBN emery wheels from stove when being less than 70 DEG C.
(5), the removal of pore creating material
After the emery wheel base substrate after sintering is carried out into cylindrical, inner circle and plane machining on cutter and tool grinding machine, measure
The volume of CBN stone layers, by 1cm3The ratio of emery wheel correspondence 20ml pure water, measures respective volume
Pure water, in pouring rustless steel container into, emery wheel is completely immersed in aqueous solution, and the potassium nitrate powder body in emery wheel is molten
Solution produces substantial amounts of pore in aqueous solution, in emery wheel, and potassium nitrate dissolving is complete after soaking 1 hour, drags for
Go out CBN emery wheel deionized waters to rinse to neutrality, drying, obtain qualified high porosity ceramic bonding agent CBN
Emery wheel.
The present invention disperses fine granularity CBN abrasive material, vitrified bond, potassium nitrate and starch in water-based solvent
Uniformly, potassium nitrate is dissolved in the water, and forms potassium nitrate solution.Then slurry is heated to into 80 DEG C, in slurry
Starch and water produce hydration reaction, slurry viscosity increases sharply, it is therefore prevented that each component powder is heavy in slurry
Drop, obtains polymolecularity slurry.By slurry drying, due to the evaporation of moisture, potassium nitrate can be with tiny spherical
The form of granule is uniformly separated out in molding mass, and the potassium nitrate content of addition is higher, nitre after the potassium nitrate of precipitation
Sour k particle diameter is bigger.After molding mass is crushed, then add a small amount of water mixing, dry-pressing formed, pressureless sintering.
Glass mutually melts in vitrified bond after sintering, and the bonding agent bridge of some strength is formed between CBN abrasive materials；
There is no chemical reaction in dolomite dusts, residue in the Vitrified Bond CBN Grinding Wheel after sintering in sintering process
In.Emery wheel impregnated in water again, potassium nitrate is dissolved in the water, the porosity of CBN emery wheels is further improved.
As known from the above, the present invention is a kind of preparation technology of high porosity Vitrified Bond CBN Grinding Wheel, should
Method adopts potassium nitrate powder for pore creating material, the CBN emery wheels after aqueous impregnation is sintered, potassium nitrate dissolving
Realize manufacturing the effect of regular circle shapes pore in aqueous solution.In pore-creating, CBN emery wheels are completed the technique
Sintering, wheel strength is high, and in can solve traditional handicraft, pore-creating causes the problem that emery wheel ftractures.
Can be prepared with the technique, voids content be higher than 60%, pore for regular circle shapes vitrified CBN wheel (referring to
Fig. 1).Surface Machining is carried out to metal parts using the CBN emery wheels, the surface grinding lines of part is very thin
Greasy rule (referring to Fig. 2).
Description of the drawings
Fig. 1 high porosity spherical porosity Ultra-fine Vitrified Bond CBN Grinding Wheel microphotograpies；
Fig. 2 is the surface grinding lines with the obtained CBN emery wheels processing part of the present invention.
Specific embodiment：
A kind of preparation technology's of high porosity Vitrified Bond CBN Grinding Wheel concretely comprises the following steps：
(1), by 40 μm of CBN abrasive materials of particle diameter, deionized water, boron glass powder, bismuth oxide powder, ice
Spar powder, feldspar in powder, potassium nitrate, corn starch and Polyethylene Glycol in mass ratio 25: 40: 10: 2: 2: 4: 12: 4: 1
Weigh respectively stand-by.
(2) the addition Polyethylene Glycol that, step (1) is weighed in deionized water, high-speed stirred 1 hour,
2000 revs/min of mixing speed, adds CBN abrasive materials, and 2000 revs/min of speed are stirred 1 hour；Add
Bismuth oxide powder, cryolite powder, feldspar in powder and potassium nitrate, 2000 revs/min of speed are stirred 2 hours, then
Corn starch is added to stir 0.5 hour, the container that then will be equipped with slurry is put in 80 DEG C of water bath, side
Stirring side is heated 0.5 hour, and slurry is in thick-pasty, obtains the ceramic size of polymolecularity.
(3) slurry that, step 2 is obtained from container scoops up material block after 120 DEG C of dryings 12 hours,
Hand-crushed crosses 60# sieves in mortar, the clear water of sieving materials quality 3% is then added with watering can, in mortar
Manual mixing 1 hour, after the sieves of 100# twice, in enclosing closed plastic bag, places 24 hours under room temperature,
Then 100# sieves are crossed, the molding mass of Ultra-fine Vitrified Bond CBN Grinding Wheel is obtained.
(4), corresponding mould is chosen according to the emery wheel specification of wanted molding, weighs the molding mass of certain mass,
In putting into mould, extrusion forming, briquetting pressure 70MPa, pressurize 1 minute, release, the demoulding, by molding
Vitrified Bond CBN Grinding Wheel biscuit afterwards is placed horizontally on SiC refractory slabs, after placing 24 hours under room temperature,
It is put in 70 DEG C of baking ovens and is dried 12 hours.
(5), the refractory slab for placing CBN emery wheels is put in shaft furnace, with the speed liter of 4 DEG C/min of heating rate
Temperature is incubated 1 hour to 400 DEG C, then is warming up to 680 DEG C with the speed of 2 DEG C/min of heating rate, insulation 2
Hour, furnace rear CBN emery wheels natural cooling in electric furnace is closed, fire door cooling is opened when furnace temperature is less than 150 DEG C,
Temperature takes out CBN emery wheels from stove when being less than 70 DEG C.
(6) the emery wheel base substrate after the sintering that, step (5) is obtained carries out cylindrical, inner circle on cutter and tool grinding machine
After plane machining, the volume of CBN stone layers is measured, by 1cm3Emery wheel correspondence 20ml pure water
Ratio, measures the pure water of respective volume, in pouring glass container into, emery wheel is completely immersed in pure water, immersion 1
Pull CBN emery wheel deionized waters after hour out to rinse to neutrality, drying, obtain qualified high porosity spherical
Gas hole ceramic bonding agent CBN emery wheels.
Claims (1)
1. a kind of high porosity Vitrified Bond CBN Grinding Wheel and its preparation technology.It is characterized in that, the method includes：
The preparation of 1, CBN abrasive wheel forming material：
(1) the percentage by weight composition of CBN wheel ceramics formula of size：
(2) preparation of CBN wheel ceramics slurry
First measure the deionized water of proper volume, then be proportionally added into the Polyethylene Glycol of molecular weight 800, at a high speed
Stirring 1 hour, 2000 revs/min of mixing speed, then by weight addition CBN abrasive materials, 2000 revs/min of speed
Stirring 0.5-1 hours；It is long that weighing boron glass powder, bismuth oxide powder, cryolite powder, potassium in proportion are distinguished again
Stone powder and potassium nitrate are added in slurry, and 2000 revs/min of speed stir 1.5-2.5 hours, then are proportionally added into jade
After rice starch is stirred 0.5 hour, the container equipped with slurry is put in 80 DEG C of water bath, is heated while stirring
0.5 hour, (when more than 70 DEG C, starch can be anti-with aqueous solvent generation aquation in slurry in thick-pasty for slurry
Should, slurry viscosity improves rapidly the sedimentation for desirably preventing powder), obtain the ceramic size of polymolecularity.
(3) preparation of the dry-pressing formed material of vitrified CBN wheel：
By slurry after 120 DEG C of dryings 12 hours, material block is scooped up from container, the hand-crushed in mortar
60# sieves are crossed, the clear water of sieving materials quality 3% is then added with watering can, manual mixing 0.5-1 is little in mortar
When, after the sieves of 100# twice, in enclosing closed plastic bag, place under room temperature 24 hours, then cross 100#
Sieve, obtains the molding mass of Ultra-fine Vitrified Bond CBN Grinding Wheel.
2, prepared by high porosity spherical porosity Ultra-fine Vitrified Bond CBN Grinding Wheel：
The molding mass of certain mass is weighed, in putting into mould, extrusion forming, briquetting pressure 50-70MPa,
Vitrified Bond CBN Grinding Wheel biscuit after molding is placed horizontally at SiC by pressurize 1 minute, release, the demoulding
On refractory slab, after being dried 24 hours under room temperature, 70 DEG C of dryings 12 hours.The refractory slab for placing CBN emery wheels is put
In entering shaft furnace, 400-500 DEG C is warming up to the speed of 3-5 DEG C/min of heating rate, is incubated 1-2 hours,
Again 650-700 DEG C is warming up to the speed of 2-4 DEG C/min of heating rate, is incubated 1.5-2 hours, close furnace rear
CBN emery wheels natural cooling in electric furnace, fire door cooling is opened when furnace temperature is less than 150 DEG C, and temperature is less than 70 DEG C
When CBN emery wheels are taken out from stove.Emery wheel base substrate after sintering is carried out into cylindrical, inner circle on cutter and tool grinding machine
After plane machining, the volume of CBN stone layers is measured, by 1cm3Emery wheel correspondence 20ml pure water
Ratio, measures the pure water of respective volume, in pouring glass container into, emery wheel is completely immersed in 1 hour in pure water,
Pull CBN emery wheel deionized waters out to rinse to neutrality, drying, obtain qualified high porosity spherical porosity pottery
Porcelain bonding agent CBN emery wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510756434.9A CN106670986A (en) | 2015-11-09 | 2015-11-09 | High-porosity ceramic binder CBN grinding wheel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510756434.9A CN106670986A (en) | 2015-11-09 | 2015-11-09 | High-porosity ceramic binder CBN grinding wheel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109108842A (en) * | 2018-08-23 | 2019-01-01 | 沈阳中科超硬磨具磨削研究所 | The vitrified abrasive that a kind of porosity is 20%-80% |
| CN110085452A (en) * | 2019-04-09 | 2019-08-02 | 宁波中车新能源科技有限公司 | A kind of device and method that full-automatic supercapacitor mixes slurry and detects slurry dispersibility |
| CN110193788A (en) * | 2019-06-09 | 2019-09-03 | 江苏赛扬精工科技有限责任公司 | It is a kind of process plane multikey broaching tool vitrified CBN wheel and its application |
| CN110607165A (en) * | 2019-08-19 | 2019-12-24 | 沈阳中科超硬磨具磨削研究所 | Method for rapidly recovering high-purity grinding material in ceramic bond CBN grinding wheel |
| CN110977799A (en) * | 2019-11-22 | 2020-04-10 | 辽宁程瑞砂轮有限公司 | Preparation method of ceramic bond large-pore grinding wheel |
| CN111113283A (en) * | 2019-12-12 | 2020-05-08 | 杭州众衡机电科技有限公司 | Grinding head for magnet grinding |
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| CN102092010A (en) * | 2010-12-09 | 2011-06-15 | 郭兵健 | Method for preparing high-porosity ceramic cement grinding wheel for polishing silicon single crystal rods |
| US20130008091A1 (en) * | 2008-06-23 | 2013-01-10 | Saint-Gobain Abrasifs | High Porosity Vitrified Superabrasive Products and Method of Preparation |
| CN103737499A (en) * | 2014-01-08 | 2014-04-23 | 苏州赛力精密工具有限公司 | End face super grinding special metal ceramic CBN (Cubic Boron Nitride) grinding wheel and preparation method thereof |
| CN103991041A (en) * | 2014-06-10 | 2014-08-20 | 长沙兴大磨料磨具有限公司 | Method for preparing ceramic bond CBN grinding wheel with high spherical porosity and ultrafine particle size |
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| US6220933B1 (en) * | 1997-09-30 | 2001-04-24 | Cummins Engine Company, Inc. | High infeed rate method for grinding ceramic workpieces with silicon carbide grinding wheels |
| US20130008091A1 (en) * | 2008-06-23 | 2013-01-10 | Saint-Gobain Abrasifs | High Porosity Vitrified Superabrasive Products and Method of Preparation |
| CN102092010A (en) * | 2010-12-09 | 2011-06-15 | 郭兵健 | Method for preparing high-porosity ceramic cement grinding wheel for polishing silicon single crystal rods |
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| CN103991041A (en) * | 2014-06-10 | 2014-08-20 | 长沙兴大磨料磨具有限公司 | Method for preparing ceramic bond CBN grinding wheel with high spherical porosity and ultrafine particle size |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109108842A (en) * | 2018-08-23 | 2019-01-01 | 沈阳中科超硬磨具磨削研究所 | The vitrified abrasive that a kind of porosity is 20%-80% |
| CN110085452A (en) * | 2019-04-09 | 2019-08-02 | 宁波中车新能源科技有限公司 | A kind of device and method that full-automatic supercapacitor mixes slurry and detects slurry dispersibility |
| CN110193788A (en) * | 2019-06-09 | 2019-09-03 | 江苏赛扬精工科技有限责任公司 | It is a kind of process plane multikey broaching tool vitrified CBN wheel and its application |
| CN110607165A (en) * | 2019-08-19 | 2019-12-24 | 沈阳中科超硬磨具磨削研究所 | Method for rapidly recovering high-purity grinding material in ceramic bond CBN grinding wheel |
| CN110977799A (en) * | 2019-11-22 | 2020-04-10 | 辽宁程瑞砂轮有限公司 | Preparation method of ceramic bond large-pore grinding wheel |
| CN111113283A (en) * | 2019-12-12 | 2020-05-08 | 杭州众衡机电科技有限公司 | Grinding head for magnet grinding |
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Application publication date: 20170517 |