CN103011835A - Production process of high-compactness compound ceramic ball bearing rolling element - Google Patents
Production process of high-compactness compound ceramic ball bearing rolling element Download PDFInfo
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- CN103011835A CN103011835A CN2012104966820A CN201210496682A CN103011835A CN 103011835 A CN103011835 A CN 103011835A CN 2012104966820 A CN2012104966820 A CN 2012104966820A CN 201210496682 A CN201210496682 A CN 201210496682A CN 103011835 A CN103011835 A CN 103011835A
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Abstract
The invention relates to a production process of a high-compactness compound ceramic ball bearing rolling element, and belongs to the field of bearing rolling element preparation. The process comprises the two steps of ceramic sintering and grinding, wherein the sintering step can sinter the silicon nitride-aluminum nitride-cubic boron nitride compound ceramic ball material at normal pressure; and grinding agents in the grinding phases of the grinding step comprise a coarse grinding agent, a fine grinding agent and a super-fine grinding. The grinding agents are used in combination in the phases of grinding, and can achieve the effects of high grinding efficiency, little pollution to the ceramic body, improved grinding efficiency, and reduced grinding time. The ceramic ball bearing rolling element has the advantages of low density, high hardness, low friction coefficient, good wear resistance, self-lubrication and rigidity, and the like, and can be widely used as a rolling element of a bearing.
Description
Technical field
The present invention relates to a kind of production technique of high-compactness composite ceramics ball bearing roller kinetoplast, belong to the bearing roller preparation field.
Background technology
Ball bearing is a kind of of rolling bearing, and the ball ball is contained in the centre of interior steel ring and outer rim, can bear larger load.Ceramic Balls particularly silicon nitride ball has low density, high rigidity, low-friction coefficient, and the characteristics such as wear-resisting, self-lubricating and good rigidly are particularly suitable for doing at a high speed, the rolling body of high precision and long lifetime hybrid ceramic ball bearing.
Cubic boron nitride ceramic all has good thermotolerance, thermostability, thermal conductivity, is desirable heat sink material and high temperature insulating material.The chemical stability of boron nitride is good, can resist the etch of most of molten metal.It also has good self lubricity.Yet its hardness is low than other high-strength ceramics, is applicable to make high-temperature bearing.Yet the sintering condition of cubic boron nitride ceramic is extremely harsh, in order to reduce its sintering temperature and condition, need to add other sintering aids in sintering process.
It is very high and extremely high temperature resistant that silicon nitride ceramics has high intensity, and its intensity does not descend at 1200 ℃ high temperature, can not be melt into after being heated and melt body, simultaneously, its resistance to chemical corrosion is excellent, the mineral acid that ability is nearly all and 30% following caustic soda soln, the also a lot of organic acid corrosion of ability.The sintering process of silicon nitride ceramics is generally three kinds: hot isostatic pressing (HIP), hot pressing (HP) and gas pressure sintering.The pressure of atmosphere sintering is 5 ~ 10MPa, and the pressure of hot pressed sintering is about 70Mpa, and the pressure of the sintering of hot isostatic pressing is 150MPa ~ 200MPa.
For thermal conductivity and the self lubricity that strengthens silicon nitride ceramics, a kind of multiphase composite material need to be provided, and reduce sintering pressure, realize pressureless sintering.
The grinding of Ceramic Balls generally comprises the step of corase grind, correct grinding and super grinding or polishing, in each step Ceramic Balls is carried out to a certain degree grinding, in order to reach better grinding effect, need to the grinding reagent in individual stage rationally be used.
Summary of the invention
The production technique that the purpose of this invention is to provide a kind of high-compactness composite ceramics ball bearing roller kinetoplast, this technique comprises ceramic post sintering and grinds two steps that sintering step can be implemented in sintered silicon nitride-aluminium nitride under the normal pressure-cubic boron nitride composite ceramics ball material; Each abrasive that grinds the stage of grinding steps comprises corase grind abrasive, correct grinding abrasive and super grinding abrasive.These abrasives are used in grinding stages, can reach the mill efficiency height, ceramic body is polluted lack, and improve the effect of mill efficiency, minimizing milling time.This ceramic ball bearing rolling body has low density, high rigidity, low-friction coefficient, and wear-resisting, self-lubricating and good rigidly etc. can be widely used as the rolling body of bearing.
A kind of production technique of high-compactness composite ceramics ball bearing roller kinetoplast comprises following processing step:
1. ceramic raw material preparation: ceramic raw material is after drying mixed in proportion, sieve, the powder after sieving is placed the ball mill ball milling,
Wherein, described ceramic raw material by mass percentage, is comprised of following component:
2. press forming: with step 1. the gained powder place grinding tool, adopt the method for isostatic cool pressing to be pressed into sphere;
3. sintering: in the nitrogen atmosphere, powder is placed mould, at 1500 ℃ ~ 1750 ℃ insulation 2h ~ 6h, cool to room temperature behind the stopped heating with the furnace;
4. grinding and polishing: the gained Ceramic Balls is ground and polished, and the sphericity of Ceramic Balls is no more than 0.07 micron, and surfaceness is no more than 0.008 micron, carries out as follows:
I. roughly grind: load pressure 5 ~ 20N/ ball; In the used corase grind abrasive, the granularity of diamond particles is 20 ~ 100 μ m, and described diamond particles is spherical, and its degree of sphericity is 0.6 ~ 0.7;
II. finish grind: load pressure 1 ~ 5N/ ball; In the described correct grinding abrasive, the granularity of diamond particles is 1 ~ 10 μ m, and described diamond particles is spherical, and its degree of sphericity is 0.7 ~ 0.75;
III. super grinding: 0.1 ~ 1N/ ball; In the described super grinding abrasive, the granularity of diamond particles is 0.01 ~ 1 μ m, and described diamond particles is spherical, and its degree of sphericity is 0.75 ~ 0.85.
Described corase grind abrasive, correct grinding abrasive and super grinding abrasive are 1:1 ~ 1:4 with the mass ratio that grinds matrix; Described matrix is water or kerosene.
The described corase grind abrasive of optimal process of the present invention, correct grinding abrasive and super grinding abrasive by mass percentage, are comprised of following component:
The described ceramic raw material of optimal process of the present invention by mass percentage, is comprised of following component:
The further preferred following proposal of optimal process of the present invention:
A kind of preparation method of high fine and close composite ceramics ball comprises following processing step:
1. ceramic raw material preparation: ceramic raw material is after drying mixed in proportion, cross 80 ~ 200 mesh sieves, the powder after sieving is placed ball mill, in speed ball milling 2h ~ 6h of 300 ~ 360r/min;
2. press forming: with step 1. the gained powder place grinding tool, adopt the method for isostatic cool pressing to be pressed into sphere;
3. sintering: in the nitrogen atmosphere, powder is placed mould, the speed with 10 ~ 20 ℃/min in sintering oven is warming up to 1500 ℃ ~ 1750 ℃, and insulation 2h ~ 6h cools to room temperature with the furnace behind the stopped heating, and wherein nitrogen flow rate is 1 ~ 5L/min;
4. grinding and polishing: the gained Ceramic Balls is ground and polished, and the sphericity of Ceramic Balls is no more than 0.07 micron, and surfaceness is no more than 0.008 micron.
The invention has the beneficial effects as follows: the production technique that the invention provides a kind of high fine and close composite ceramics ball bearing roller kinetoplast, this technique comprises ceramic post sintering and grinds two steps that sintering step can be implemented in sintered silicon nitride-aluminium nitride under the normal pressure-cubic boron nitride composite ceramics ball material; Each abrasive that grinds the stage of grinding steps comprises corase grind abrasive, correct grinding abrasive and super grinding abrasive.These abrasives are used in grinding stages, can reach the mill efficiency height, ceramic body is polluted lack, and improve the effect of mill efficiency, minimizing milling time.This ceramic ball bearing rolling body has low density, high rigidity, low-friction coefficient, and wear-resisting, self-lubricating and good rigidly etc. can be widely used as the rolling body of bearing.
Embodiment
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
Embodiment 1
1. ceramic raw material preparation: ceramic raw material is after drying mixed in proportion, cross 120 mesh sieves, the powder after sieving is placed ball mill, in the speed ball milling 5h of 300r/min;
2. press forming: with step 1. the gained powder place grinding tool, adopt the method for isostatic cool pressing to be pressed into sphere;
3. sintering: in the nitrogen atmosphere, powder is placed mould, the speed with 15 ℃/min in sintering oven is warming up to 1750 ℃, and insulation 3h cools to room temperature with the furnace behind the stopped heating, and wherein nitrogen flow rate is 2L/min;
4. grinding and polishing: I. roughly grinds: load pressure 10N/ ball; In the described corase grind abrasive, the granularity of diamond particles is 20 ~ 100 μ m, and described diamond particles is spherical, and its degree of sphericity is 0.65, and granularity is that the quality of the diamond particles of 20 ~ 50 μ m accounts for 65% of diamond particles total mass at least in the diamond particles;
II. finish grind: load pressure 2N/ ball; In the described correct grinding abrasive, the granularity of diamond particles is 1 ~ 10 μ m, and described diamond particles is spherical, and its degree of sphericity is 0.7, and granularity is that the quality of the diamond particles of 1 ~ 5 μ m accounts for 65% of diamond particles total mass at least in the diamond particles;
III. super grinding: 0.5N/ ball; In the described super grinding abrasive, the granularity of diamond particles is 0.01 ~ 1 μ m, and described diamond particles is spherical, and its degree of sphericity is 0.75, and granularity is that the quality of the diamond particles of 0.01 ~ 0.5 μ m accounts for 70% of diamond particles total mass at least in the diamond particles,
Described corase grind abrasive, correct grinding abrasive and super grinding abrasive by mass percentage, are comprised of following component:
Dispersion agent is polyoxyethylene glycol.Be used for stage by stage the polishing silicon nitride Ceramic Balls after 1:1 mixes in mass ratio with water with three kinds of abrasives, the sphericity of gained Ceramic Balls is 0.05 μ m, surfaceness 0.005 μ m.
Claims (2)
1. the production technique of a high-compactness composite ceramics ball bearing roller kinetoplast is characterized in that: comprise following processing step:
1. ceramic raw material preparation: ceramic raw material is after drying mixed in proportion, sieve, the powder after sieving is placed the ball mill ball milling,
Wherein, described ceramic raw material by mass percentage, is comprised of following component:
2. press forming: with step 1. the gained powder place grinding tool, adopt the method for isostatic cool pressing to be pressed into sphere;
3. sintering: in the nitrogen atmosphere, powder is placed mould, at 1500 ℃ ~ 1750 ℃ insulation 2h ~ 6h, cool to room temperature behind the stopped heating with the furnace;
4. grinding and polishing: the gained Ceramic Balls is ground and polished, and the sphericity of Ceramic Balls is no more than 0.07 micron, and surfaceness is no more than 0.008 micron, carries out as follows:
I. roughly grind: load pressure 5 ~ 20N/ ball; In the used corase grind abrasive, the granularity of diamond particles is 20 ~ 100 μ m, and described diamond particles is spherical, and its degree of sphericity is 0.6 ~ 0.7;
II. finish grind: load pressure 1 ~ 5N/ ball; In the described correct grinding abrasive, the granularity of diamond particles is 1 ~ 10 μ m, and described diamond particles is spherical, and its degree of sphericity is 0.7 ~ 0.75;
III. super grinding: 0.1 ~ 1N/ ball; In the described super grinding abrasive, the granularity of diamond particles is 0.01 ~ 1 μ m, and described diamond particles is spherical, and its degree of sphericity is 0.75 ~ 0.85;
Described corase grind abrasive, correct grinding abrasive and super grinding abrasive are 1:1 ~ 1:4 with the mass ratio that grinds matrix; Described matrix is water or kerosene.
2. technique according to claim 1 is characterized in that: described corase grind abrasive, correct grinding abrasive and super grinding abrasive by mass percentage, are comprised of following component:
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| CN201210496682.0A CN103011835B (en) | 2012-11-28 | 2012-11-28 | Production process of high-compactness compound ceramic ball bearing rolling element |
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| CN201210496682.0A CN103011835B (en) | 2012-11-28 | 2012-11-28 | Production process of high-compactness compound ceramic ball bearing rolling element |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104629683A (en) * | 2015-01-13 | 2015-05-20 | 江苏金石研磨有限公司 | Preparation method of high-strength parent nucleus for centrifugal shaping of ceramic grinding ball |
| CN110395990A (en) * | 2019-08-27 | 2019-11-01 | 济南鸿泰华丰机械有限公司 | A kind of high quality bearing |
| CN110698206A (en) * | 2019-10-15 | 2020-01-17 | 洛阳轴承研究所有限公司 | Sintering method of large-size silicon nitride bearing ball and preparation method of large-size silicon nitride bearing ball |
| CN113043074A (en) * | 2019-12-26 | 2021-06-29 | 扬州振光机械有限公司 | Ball grinding processing technology |
| CN115849915A (en) * | 2022-12-23 | 2023-03-28 | 福建华清电子材料科技有限公司 | Aluminum nitride ball rolling forming method |
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| CN101049676A (en) * | 2007-05-15 | 2007-10-10 | 山东东阿钢球集团有限公司 | Technique for processing silicon fluoride ball in G3 grade |
| CN101583804A (en) * | 2006-12-20 | 2009-11-18 | Ntn株式会社 | Rolling bearing, hub unit, rolling member, universal joint, torque transmission member for universal joint, and process for producing the same |
| CN101838144A (en) * | 2010-06-01 | 2010-09-22 | 陕西科技大学 | BaTiO3-based PTC thermal sensitive ceramic material and preparation method thereof |
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2012
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101583804A (en) * | 2006-12-20 | 2009-11-18 | Ntn株式会社 | Rolling bearing, hub unit, rolling member, universal joint, torque transmission member for universal joint, and process for producing the same |
| CN101049676A (en) * | 2007-05-15 | 2007-10-10 | 山东东阿钢球集团有限公司 | Technique for processing silicon fluoride ball in G3 grade |
| CN101838144A (en) * | 2010-06-01 | 2010-09-22 | 陕西科技大学 | BaTiO3-based PTC thermal sensitive ceramic material and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104629683A (en) * | 2015-01-13 | 2015-05-20 | 江苏金石研磨有限公司 | Preparation method of high-strength parent nucleus for centrifugal shaping of ceramic grinding ball |
| CN104629683B (en) * | 2015-01-13 | 2017-01-11 | 江苏金石研磨有限公司 | Preparation method of high-strength parent nucleus for centrifugal shaping of ceramic grinding ball |
| CN110395990A (en) * | 2019-08-27 | 2019-11-01 | 济南鸿泰华丰机械有限公司 | A kind of high quality bearing |
| CN110395990B (en) * | 2019-08-27 | 2020-07-07 | 山东华工轴承有限公司 | High-quality bearing |
| CN110698206A (en) * | 2019-10-15 | 2020-01-17 | 洛阳轴承研究所有限公司 | Sintering method of large-size silicon nitride bearing ball and preparation method of large-size silicon nitride bearing ball |
| CN110698206B (en) * | 2019-10-15 | 2021-10-22 | 洛阳轴承研究所有限公司 | Sintering method of large-size silicon nitride bearing ball and preparation method of large-size silicon nitride bearing ball |
| CN113043074A (en) * | 2019-12-26 | 2021-06-29 | 扬州振光机械有限公司 | Ball grinding processing technology |
| CN115849915A (en) * | 2022-12-23 | 2023-03-28 | 福建华清电子材料科技有限公司 | Aluminum nitride ball rolling forming method |
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Effective date of registration: 20190129 Address after: 402460 703, 7th floor, Innovation and Development Center, 19 Lingfang Avenue, Changzhou Street, Rongchang District, Chongqing Patentee after: Chongqing Dayou Hongye Ceramics Co.,Ltd. Address before: 116600 Liaoning Province Dalian Jinpu New District No. 9 Liaohe West Second Road Patentee before: DALIAN DAYOU PRECISION CERAMIC BEARING Co.,Ltd. Effective date of registration: 20190129 Address after: 116600 Liaoning Province Dalian Jinpu New District No. 9 Liaohe West Second Road Patentee after: DALIAN DAYOU PRECISION CERAMIC BEARING Co.,Ltd. Address before: 116000 No. 9 Liaohe West Second Road, Dalian Development Zone, Liaoning Province Patentee before: DALIAN DAYOU HI-TECH CERAMIC Co.,Ltd. |
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