CN105127913A - High-hardness and creep-resistance CBN grinding wheel with ultrafine granularity and preparation method thereof - Google Patents
High-hardness and creep-resistance CBN grinding wheel with ultrafine granularity and preparation method thereof Download PDFInfo
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- CN105127913A CN105127913A CN201510534193.3A CN201510534193A CN105127913A CN 105127913 A CN105127913 A CN 105127913A CN 201510534193 A CN201510534193 A CN 201510534193A CN 105127913 A CN105127913 A CN 105127913A
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Abstract
The invention discloses a high-hardness and creep-resistance CBN grinding wheel with ultrafine granularity; firstly, CBN abrasives with ultrafine granularity and sintered alumina abrasives are pretreated to improve the mechanical performance in the preparation process of the grinding wheel; abrasives dipped by solution prepared by sodium polystyrenesulfonate and polyethyleneimine are excellent in dispersibility and are not easy to be agglomerated; after such raw materials as chitosan, lithium base bentonite and nanometer ceramic powder transparent liquid, the abrasives are formed to a stable system without being precipitated and flocculated in the solution; dried powder and adhesive are better in wettability and compatibility; the bonding is tighter and firmer; the bridging strength is high; the grinding wheel is higher in hardness; the adhesive using fluorine carbon resins as main components enables the surface of the grinding wheel to become more smooth; the porosity is high; and cracks are not easy to be generated; and the prepared CBN grinding wheel with ultrafine granularity is high in blank hardness and excellent in cold and hot fatigue, resists both creep and wear, and can be applied to the grinding of high-precision metal parts.
Description
Technical field
The present invention relates to Ultra-fine CBN emery wheel preparing technical field, particularly relate to a kind of high rigidity creep resisting Ultra-fine CBN emery wheel and preparation method thereof.
Background technology
Ultra-fine CBN emery wheel refers to the class emery wheel made with the CBN abrasive material of Ultra-fine (≤5 μm) and bonding agent, this kind of emery wheel has lower surface roughness and surface damage than traditional emery wheel material, the precision of polishing, grinding is higher, more can improve component surface quality, be also an important directions of emery wheel industry development.
In production technology, due to the Ultra-fine of abrasive material, easily reunite between abrasive material, be deteriorated with the associativity of bonding agent, the emery wheel prepared so just very easily produces cut to surface of the work, affect workpiece quality, therefore, need in process of production to carry out pretreatment to ultra-fine abrasive material, improve compatibility and the dispersiveness of itself and binding agent, development is simultaneously applicable to the binding agent of ultra-fine grain diameter abrasive material, to obtain the finished product of low surface roughness.Also there is the shortcomings such as working (machining) efficiency is low, production cost is higher in the technology preparing Ultra-fine emery wheel at present, needs to improve further and optimizing raw material formula and preparation technology.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of high rigidity creep resisting Ultra-fine CBN emery wheel and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of high rigidity creep resisting Ultra-fine CBN emery wheel, this emery wheel is made up of the raw material of following weight portion: alundum abrasive material 15-18, the binding agent 2-3 of the CBN abrasive material 30-40 of granularity≤5 μm, granularity≤5 μm, lithium bentonite 1-2, solid content are that the nano-ceramic powder transparency liquid 8-10 of 35-40%, hydrofluoric acid (concentration 40%) are appropriate, kayexalate 0.5-0.8, polymine 0.4-0.5, shitosan 1-2, deionized water 55-60.
Described a kind of high rigidity creep resisting Ultra-fine CBN emery wheel, described binding agent is made up of the raw material of following weight portion: solid content is that water-base fluorocarbon emulsion 12-15, the sodium alginate 4-5 of 40-45%, nano silicon 2-3, deionized water are appropriate; Its preparation method is: be dissolved in appropriate deionized water by sodium alginate, is stirred to it and dissolves completely, adds water-base fluorocarbon emulsion, nano silicon subsequently, and ultrasonic agitation is dispersed to material and mixes completely and be uniformly dispersed and get final product.
Described a kind of high rigidity creep resisting Ultra-fine CBN emery wheel and preparation method thereof, its spy is, described preparation method is:
(1) first CBN abrasive material, alundum abrasive material are dropped into dipping pretreatment 30-40min in hydrofluoric acid solution, filter subsequently, be washed to neutrality, drying for standby;
(2) kayexalate, polymine are dropped in deionized water, be stirred to after material dissolves completely, add the compound abrasive that step (1) obtains, be uniformly mixed, drop into other residual components except binding agent subsequently again, for subsequent use after leaving standstill 1-2h after being uniformly mixed 30-40min;
(3) by the dry process under 80-100 DEG C of condition of step (2) gained material, dried material is broken, cross 200-300 mesh sieve, screened material is mixed with binding agent, by mixed material ball milling dispersion 20-30min after being uniformly mixed, material is die-filling, shaping, the demoulding subsequently, obtain idiosome emery wheel, wherein briquetting pressure is 40-50MPa, subsequently idiosome emery wheel to be sent in the baking oven of 70-80 DEG C after dry 5-6h with the ramp of 4-5 DEG C/min to 230-250 DEG C, naturally cool to room temperature after insulation 4-5h and namely obtain this Ultra-fine CBN emery wheel.
The present invention first utilizes hydrofluoric acid to the CBN abrasive material of Ultra-fine, alundum abrasive material carries out pretreatment, abrasive surface after process is regular, smooth, impurity content is few, mechanical property promotes further, and with kayexalate, abrasive material dispersiveness after the solution immersion treatment of the preparation such as polymine is good, not easily reunite, add shitosan, lithium bentonite, after the raw materials such as nano-ceramic powder transparency liquid, abrasive material is formed in the solution and does not precipitate, the stabilising system of flocculation, wetability and the compatibility of dried powder and binding agent are better, bond more close and firm, bridging intensity is high, the hardness of emery wheel is higher, and the binding agent based on fluorocarbon resin makes wheel face more bright and clean, the porosity is high, not easily crack, Ultra-fine CBN emery wheel idiosome hardness prepared by the present invention is large, and cool-hot fatigue is good, creep resistance, wear-resisting, can be applicable to high-precision metal parts grinding and uses.
Detailed description of the invention
The emery wheel of this embodiment is made up of the raw material of following weight portion: the alundum abrasive material 15 of the CBN abrasive material 30 of granularity≤5 μm, granularity≤5 μm, binding agent 2, lithium bentonite 1, solid content are nano-ceramic powder transparency liquid 8, hydrofluoric acid (concentration 40%) appropriate, kayexalate 0.5, polymine 0.4, shitosan 1, the deionized water 55 of 35%.
Binding agent is wherein made up of the raw material of following weight portion: solid content be 40% water-base fluorocarbon emulsion 12, sodium alginate 4, nano silicon 2, deionized water appropriate; Its preparation method is: be dissolved in appropriate deionized water by sodium alginate, is stirred to it and dissolves completely, adds water-base fluorocarbon emulsion, nano silicon subsequently, and ultrasonic agitation is dispersed to material and mixes completely and be uniformly dispersed and get final product.
The preparation method of this emery wheel is:
(1) first CBN abrasive material, alundum abrasive material are dropped into dipping pretreatment 30min in hydrofluoric acid solution, filter subsequently, be washed to neutrality, drying for standby;
(2) kayexalate, polymine are dropped in deionized water, be stirred to after material dissolves completely, add the compound abrasive that step (1) obtains, be uniformly mixed, drop into other residual components except binding agent subsequently again, for subsequent use after leaving standstill 1h after being uniformly mixed 30min;
(3) by the dry process under 80 DEG C of conditions of step (2) gained material, dried material is broken, cross 200 mesh sieves, screened material is mixed with binding agent, by mixed material ball milling dispersion 20min after being uniformly mixed, material is die-filling, shaping, the demoulding subsequently, obtain idiosome emery wheel, wherein briquetting pressure is 40MPa, subsequently idiosome emery wheel to be sent in the baking oven of 70 DEG C with the ramp to 230 DEG C of 4 DEG C/min after dry 5h, naturally cool to room temperature after insulation 4h and namely obtain this Ultra-fine CBN emery wheel.
The grinding wheel performance index that embodiment prepares is as follows:
Being ground material in test is tool steel, and grinding method is transverse grinding, emery wheel peripheral speed: 100m/s, the speed of table: 0.05m/s, grinding depth: 0.025mm.
The more traditional resin CBN wheel grinding of the emery wheel prepared of the present embodiment improves 325% than average, and the average currying work interval extends 7 times, extends more than 8 times service life.Through the grinding of 60min, the roughness of surface of the work is only 0.04 μm, and surface of the work is without burn, and maximum grinding speed can reach 142m/s.
Claims (3)
1. a high rigidity creep resisting Ultra-fine CBN emery wheel, it is characterized in that, this emery wheel is made up of the raw material of following weight portion: alundum abrasive material 15-18, the binding agent 2-3 of the CBN abrasive material 30-40 of granularity≤5 μm, granularity≤5 μm, lithium bentonite 1-2, solid content are that the nano-ceramic powder transparency liquid 8-10 of 35-40%, hydrofluoric acid (concentration 40%) are appropriate, kayexalate 0.5-0.8, polymine 0.4-0.5, shitosan 1-2, deionized water 55-60.
2. a kind of high rigidity as claimed in claim 1 creep resisting Ultra-fine CBN emery wheel, it is characterized in that, described binding agent is made up of the raw material of following weight portion: solid content is that water-base fluorocarbon emulsion 12-15, the sodium alginate 4-5 of 40-45%, nano silicon 2-3, deionized water are appropriate; Its preparation method is: be dissolved in appropriate deionized water by sodium alginate, is stirred to it and dissolves completely, adds water-base fluorocarbon emulsion, nano silicon subsequently, and ultrasonic agitation is dispersed to material and mixes completely and be uniformly dispersed and get final product.
3. a kind of high rigidity as claimed in claim 1 creep resisting Ultra-fine CBN emery wheel and preparation method thereof, its spy is, described preparation method is:
(1) first CBN abrasive material, alundum abrasive material are dropped into dipping pretreatment 30-40min in hydrofluoric acid solution, filter subsequently, be washed to neutrality, drying for standby;
(2) kayexalate, polymine are dropped in deionized water, be stirred to after material dissolves completely, add the compound abrasive that step (1) obtains, be uniformly mixed, drop into other residual components except binding agent subsequently again, for subsequent use after leaving standstill 1-2h after being uniformly mixed 30-40min;
(3) by the dry process under 80-100 DEG C of condition of step (2) gained material, dried material is broken, cross 200-300 mesh sieve, screened material is mixed with binding agent, by mixed material ball milling dispersion 20-30min after being uniformly mixed, material is die-filling, shaping, the demoulding subsequently, obtain idiosome emery wheel, wherein briquetting pressure is 40-50MPa, subsequently idiosome emery wheel to be sent in the baking oven of 70-80 DEG C after dry 5-6h with the ramp of 4-5 DEG C/min to 230-250 DEG C, naturally cool to room temperature after insulation 4-5h and namely obtain this Ultra-fine CBN emery wheel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111421477A (en) * | 2020-04-12 | 2020-07-17 | 江苏赛扬精工科技有限责任公司 | Large-porosity ceramic cBN grinding wheel and preparation method and application thereof |
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| US5178644A (en) * | 1992-01-23 | 1993-01-12 | Cincinnati Milacron Inc. | Method for making vitreous bonded abrasive article and article made by the method |
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| US6551366B1 (en) * | 2000-11-10 | 2003-04-22 | 3M Innovative Properties Company | Spray drying methods of making agglomerate abrasive grains and abrasive articles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111421477A (en) * | 2020-04-12 | 2020-07-17 | 江苏赛扬精工科技有限责任公司 | Large-porosity ceramic cBN grinding wheel and preparation method and application thereof |
| CN111421477B (en) * | 2020-04-12 | 2021-10-22 | 江苏赛扬精工科技有限责任公司 | Large-porosity ceramic cBN grinding wheel and preparation method and application thereof |
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Application publication date: 20151209 |
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