CN105127917A - Ultra-fine-granularity CBN (Cubic Boron Nitride) grinding wheel with high smoothness and high grinding precision and preparation method thereof - Google Patents
Ultra-fine-granularity CBN (Cubic Boron Nitride) grinding wheel with high smoothness and high grinding precision and preparation method thereof Download PDFInfo
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- CN105127917A CN105127917A CN201510537547.XA CN201510537547A CN105127917A CN 105127917 A CN105127917 A CN 105127917A CN 201510537547 A CN201510537547 A CN 201510537547A CN 105127917 A CN105127917 A CN 105127917A
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Abstract
The invention discloses an ultra-fine-granularity CBN (Cubic Boron Nitride) grinding wheel with high smoothness and high grinding precision. The grinding wheel is characterized in that ultra-fine-granularity fused alumina zirconia grinding material and ultra-fine-granularity CBN grinding material are preprocessed during the preparation process so as to improve the mechanical property of the grinding wheel; the grinding materials soaked through a solution prepared from sodium polystyrenesulfonate, polyethyleneimine and the like are outstanding in dispersity and is not prone to agglomeration; after chitosan, lithium base bentonite and other raw materials are added, the grinding materials can form a stabile system without precipitating and flocculating in the solution; the dried powder has good wettability and the compatibility between the dried power and an adhesive is improved, so that the dried powder and the adhesive can be closely and firmly bonded to each other; fluorocarbon resin is used as the adhesive, so that the surface of the grinding wheel is smooth and is not easy to be clung by scraps during a grinding process, so that easy cleaning is realized. The ultra-fine-granularity CBN grinding wheel prepared by the method is high in blank strength, resistant to corrosion and abrasion, small and uniform in air pores, smooth and dense in surface, and applicable to high-precision grinding of metal parts.
Description
Technical field
The present invention relates to Ultra-fine CBN emery wheel preparing technical field, particularly relate to Ultra-fine CBN emery wheel of a kind of best bright finish height grinding accuracy 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 Ultra-fine CBN emery wheel of a kind of best bright finish height grinding accuracy and preparation method thereof.
The present invention is achieved by the following technical solutions:
A Ultra-fine CBN emery wheel for best bright finish height grinding accuracy, this emery wheel is made up of the raw material of following weight portion: CBN abrasive material 30-40, the binding agent 2-3 of the fused alumina zirconia abrasive material 10-15 of granularity≤5 μm, granularity≤5 μm, lithium bentonite 1-2, methylcellulose 0.2-0.3, hydrofluoric acid (concentration 40%) are appropriate, kayexalate 0.5-0.8, polymine 0.4-0.5, shitosan 0.4-0.5, deionized water 60-65.
The Ultra-fine CBN emery wheel of described a kind of best bright finish height grinding accuracy, 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.
Ultra-fine CBN emery wheel of described a kind of best bright finish height grinding accuracy and preparation method thereof, its spy is, described preparation method is:
(1) first fused alumina zirconia abrasive material, CBN 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 fused alumina zirconia abrasive material of Ultra-fine, CBN abrasive material carries out pretreatment, abrasive surface after process is regular, smooth, mechanical property is improved, and with kayexalate, abrasive material dispersiveness after the solution immersion treatment of the preparation such as polymine is good, not easily reunite, add shitosan, after the raw materials such as lithium bentonite, 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, bonding close and firm, and make wheel face more bright and clean using fluorocarbon resin as binding agent, not easily scrap is adhered in grinding process, be easy to cleaning, Ultra-fine CBN emery wheel idiosome intensity prepared by the present invention is high, corrosion-proof wear, pore fine uniform, and any surface finish is fine and close, can be applicable to high-precision metal parts grinding and uses.
Detailed description of the invention
This embodiment emery wheel is made up of the raw material of following weight portion: the CBN abrasive material 30 of the fused alumina zirconia abrasive material 10 of granularity≤5 μm, granularity≤5 μm, binding agent 2, lithium bentonite 1, methylcellulose 0.2, hydrofluoric acid (concentration 40%) are appropriate, kayexalate 0.5, polymine 0.4, shitosan 0.4, deionized water 60.
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 embodiment emery wheel is:
(1) first fused alumina zirconia abrasive material, CBN 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 245% than average, and the average currying work interval extends more than 8 times, extends more than 5 times service life.Through the grinding of 60min, the roughness of surface of the work is only 0.02 μm, and surface of the work is without burn, and maximum grinding speed can reach 145m/s.
Claims (3)
1. the Ultra-fine CBN emery wheel of a best bright finish height grinding accuracy, it is characterized in that, this emery wheel is made up of the raw material of following weight portion: CBN abrasive material 30-40, the binding agent 2-3 of the fused alumina zirconia abrasive material 10-15 of granularity≤5 μm, granularity≤5 μm, lithium bentonite 1-2, methylcellulose 0.2-0.3, hydrofluoric acid (concentration 40%) are appropriate, kayexalate 0.5-0.8, polymine 0.4-0.5, shitosan 0.4-0.5, deionized water 60-65.
2. the Ultra-fine CBN emery wheel of a kind of best bright finish height grinding accuracy as claimed in claim 1, 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. the Ultra-fine CBN emery wheel and preparation method thereof of a kind of best bright finish height grinding accuracy as claimed in claim 1, its spy is, described preparation method is:
(1) first fused alumina zirconia abrasive material, CBN 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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| CN201510537547.XA CN105127917A (en) | 2015-08-27 | 2015-08-27 | Ultra-fine-granularity CBN (Cubic Boron Nitride) grinding wheel with high smoothness and high grinding precision and preparation method thereof |
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| CN201510537547.XA CN105127917A (en) | 2015-08-27 | 2015-08-27 | Ultra-fine-granularity CBN (Cubic Boron Nitride) grinding wheel with high smoothness and high grinding precision and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113732966A (en) * | 2021-08-04 | 2021-12-03 | 郑州磨料磨具磨削研究所有限公司 | Composite binder grinding wheel and preparation method thereof |
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