CN112760040B - Magnetic polishing solution suitable for die-casting aluminum alloy material - Google Patents
Magnetic polishing solution suitable for die-casting aluminum alloy material Download PDFInfo
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- CN112760040B CN112760040B CN202011442454.6A CN202011442454A CN112760040B CN 112760040 B CN112760040 B CN 112760040B CN 202011442454 A CN202011442454 A CN 202011442454A CN 112760040 B CN112760040 B CN 112760040B
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- neodymium iron
- iron boron
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
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Abstract
The invention discloses a magnetic polishing solution suitable for die-casting aluminum alloy materials and a preparation method thereof. The magnetic fluid polishing solution is a key technology of magnetic fluid polishing. The magnetic polishing solution disclosed by the invention comprises the following components in percentage by mass: 10% of neodymium iron boron magnetic powder, 10% of superhard abrasive micropowder, 75% of base liquid, 2% of thixotropic agent and 3% of anti-settling agent. The neodymium iron boron magnetic particles have high magnetism, can better wrap and drive superhard grinding materials, improve the polishing efficiency, and the combination body can be agglomerated into a flexible body under the action of the magnetic micro powder due to the addition of the base liquid and the anti-precipitation agent, and the combination body can change the rigidity of the flexible body under the control of an external magnet, so that the controllable polishing force is realized.
Description
Technical Field
The invention belongs to the technical field of polishing, and particularly relates to a magnetic polishing solution suitable for die-casting aluminum alloy materials and a preparation method thereof.
Background
In the light-weight automobile material, the comprehensive cost performance of the aluminum alloy material is higher than that of steel, magnesium, plastic and composite materials, and the aluminum alloy material has advantages in application technology, operation safety and cyclic regeneration. However, various mechanical processing methods for aluminum alloy high-precision surface workpieces are almost inevitable from cold processing to hot processing, and defects such as surface unevenness, flash, remarkable convex edge, micro-cracks, burrs and the like are left on the surfaces of the parts. In order to eliminate the surface defects left on the surface of the part due to the machining, the part is required to be polished.
The selection of an appropriate polishing method and polishing process is an important means for improving the quality of the product. The existing polishing technologies include mechanical polishing, chemical polishing, electrolytic polishing, ultrasonic polishing, magnetofluid polishing and the like. The high-efficiency precise polishing technology has great influence on the final forming and using performance of the workpiece. Among these polishing techniques, magnetofluid polishing is most prominently performed. The magnetic fluid polishing technology is a polishing technology for grinding the surface of a workpiece by utilizing magnetic grinding materials (filled in a processing gap of the workpiece) to contact with the surface of the workpiece under an external magnetic field and to move relatively. Compared with the traditional polishing technology, the magnetofluid polishing has the advantages of high efficiency, no subsurface damage, suitability for complex surface processing, adjustable grinding head hardness, zero abrasion in the processing process and the like. One of the key technologies of magnetofluid polishing is the development of magnetofluid polishing solution.
Disclosure of Invention
The invention aims to provide polishing solution with magnetic particles wrapping superhard abrasive materials and suitable for die-casting aluminum alloy materials and a preparation method thereof.
The invention adopts the following technical scheme:
the invention provides a magnetic polishing solution suitable for die-casting aluminum alloy materials, which comprises the following components in percentage by mass: 10% of neodymium iron boron magnetic powder, 10% of superhard abrasive micropowder, 75% of base liquid, 2% of thixotropic agent and 3% of anti-settling agent.
Preferably, the particle size of the neodymium iron boron magnetic powder is 5 μm.
Preferably, the super-hard abrasive micro powder is diamond micro powder or cubic boron nitride micro powder, and the granularity is 5 mu m.
Preferably, the base fluid is vegetable oil.
More preferably, the vegetable oil is corn oil, peanut oil or castor oil.
Preferably, the thixotropic agent is graphite powder with the granularity of 5 microns, so that the cutting stress of the polishing solution in the grinding process is improved.
Preferably, the anti-settling agent is diatomite to prevent the magnetic particles in the polishing solution from caking.
The preparation method of the magnetic polishing solution suitable for the die-casting aluminum alloy material comprises the following specific steps:
step one, fragmentizing neodymium iron boron magnets, and putting fragments screened out by a screen with 5mm sieve pores into a mixer for atomization and wetting treatment; pressing the atomized and wetted fragments in a ball press, drying the formed wetted neodymium iron boron magnetic block balls in a heating furnace, cooling, crushing in a roller press, and performing ball milling, drying and ball milling again in sequence to obtain neodymium iron boron magnetic powder with the particle size of 5 microns;
step two, weighing the neodymium iron boron magnetic powder obtained in the step one according to the proportion, gradually adding the super-hard abrasive micro powder for 3 times, and manually stirring for 20 minutes after adding the diamond micro powder each time for mixing; after the superhard abrasive material micro powder is completely added, stirring the mixture by using an electric stirrer to obtain a neodymium iron boron inclusion body wrapping the superhard abrasive material micro powder;
thirdly, adding all neodymium iron boron inclusions into deionized water with the mass 5 times that of the neodymium iron boron inclusions, and then carrying out ultrasonic stirring for 20 minutes; gradually adding the anti-precipitant in the stirring process, and continuously stirring for 15 minutes by ultrasonic after the anti-precipitant is completely added to obtain the jelly.
Step four, adding a thixotropic agent into the jelly obtained in the step three, and further performing ultrasonic stirring for 20 minutes to obtain the water-based magnetic particle coated abrasive.
Putting the water-based magnetic particle coated abrasive into a vacuum drier for vacuum drying for 6 hours, and cooling to obtain the neodymium iron boron magnetic particle coated abrasive;
step six, sequentially crushing, ball-milling, vacuum drying and cooling the neodymium iron boron magnetic particle coated abrasive obtained in the step five to obtain neodymium iron boron magnetic particle coated coarse particles;
step seven, performing ball milling on the coarse particles wrapped by the neodymium iron boron magnetic particles again, and then screening by using a 2000-mesh screen to obtain micro powder particles wrapped by the neodymium iron boron magnetic particles;
and step eight, pouring the base solution into the micro powder particles coated by the neodymium iron boron magnetic particles, carrying out electromechanical stirring for 15 minutes, and then carrying out ultrasonic stirring for 20 minutes to obtain the superhard abrasive polishing solution coated by the neodymium iron boron magnetic particles.
Preferably, the stirring speed of the electric stirrer in the step two is 1000r/min, and the stirring speed of the electric stirrer in the step eight is 500 r/min.
Preferably, the ultrasonic power of the ultrasonic agitation is 200W.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention fully considers the characteristics of strong magnetism, high stability and difficult oxidation of the neodymium iron boron magnet. With particles of a generally ferromagnetic material (e.g. Fe)2O3、Fe3O4Etc.), neodymium iron boron magnetism granule itself has very high magnetism, can wrap up and drive superhard abrasive better, and the polishing efficiency is improved to a great extent.
(2) The invention uses neodymium iron boron magnetic particles as a carrier to wrap the superhard grinding material to drive the grinding material to approach a workpiece and polish the workpiece, wherein the neodymium iron boron magnetic particles and the superhard grinding material are rigid materials, but the combination can be agglomerated into a flexible body under the action of the magnetic micro powder due to the addition of the base liquid and the anti-precipitation agent; the combination body can change the rigidity of the flexible body under the control of an external magnet (magnetic force) to realize controllable polishing force. Therefore, the invention is more rapid and efficient compared with most of the current methods of pushing the diamond abrasive by scouring and impacting the ferromagnetic material, which is one of the reasons for the better polishing effect of the invention.
Drawings
FIG. 1 is a flow chart of the preparation of the magnetic polishing solution of the present invention;
FIG. 2 is a surface roughness measurement of an aluminum block polished with the magnetic polishing solution prepared according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment,
A magnetic polishing solution suitable for die-casting aluminum alloy materials comprises the following components: 40g of neodymium iron boron magnetic powder, 40g of diamond micro powder, 300g of corn oil, 8g of graphite powder and 12g of diatomite.
Example II,
As shown in fig. 1, in the first embodiment, the preparation method of the magnetic polishing solution suitable for die-casting aluminum alloy material specifically includes the following steps:
And 4, adding 8g of graphite powder into the jelly obtained in the step 3, and further performing ultrasonic stirring for 20 minutes to obtain the water-based magnetic particle coated abrasive which is still colloidal.
step 7, performing ball milling on the coarse particles wrapped by the neodymium iron boron magnetic particles again, and then screening by using a 2000-mesh screen to obtain micro powder particles wrapped by the neodymium iron boron magnetic particles;
and 8, pouring 300g of corn oil into the micro powder particles coated with the neodymium iron boron magnetic particles, carrying out electromechanical stirring (stirring by an electric stirrer) for 15 minutes at a stirring speed of 500r/min, and then carrying out ultrasonic stirring for 20 minutes at an ultrasonic power of 200W to obtain the diamond abrasive polishing solution coated with the neodymium iron boron magnetic particles.
The diamond abrasive polishing solution wrapped by the neodymium iron boron magnetic particles prepared in the embodiment is applied to polishing the surface of an aluminum block, the polishing effect is shown in fig. 2, and the surface roughness value Ra reaches 5.366 nm; the abscissa is the sampling length of the aluminum block subjected to surface polishing and subjected to surface roughness detection, and the ordinate is the surface profile height based on the lowest point in the sampling length after the surface polishing.
Claims (8)
1. The utility model provides a magnetism polishing solution suitable for die-casting aluminum alloy material which characterized in that: the paint consists of the following components in percentage by mass: 10% of neodymium iron boron magnetic powder, 10% of superhard abrasive micropowder, 75% of base liquid, 2% of thixotropic agent and 3% of anti-settling agent; the thixotropic agent is graphite powder with the granularity of 5 mu m;
the preparation method of the magnetic polishing solution comprises the following specific steps:
step one, fragmentizing neodymium iron boron magnets, and putting fragments screened out by a screen with 5mm sieve pores into a mixer for atomization and wetting treatment; pressing the atomized and wetted fragments in a ball press, drying the formed wetted neodymium iron boron magnetic block balls in a heating furnace, cooling, crushing in a roller press, and performing ball milling, drying and ball milling again in sequence to obtain neodymium iron boron magnetic powder with the particle size of 5 microns;
step two, weighing the neodymium iron boron magnetic powder obtained in the step one according to the proportion, gradually adding the super-hard abrasive micro powder for 3 times, and manually stirring for 20 minutes to mix after adding the super-hard abrasive micro powder each time; after the superhard abrasive material micro powder is completely added, stirring the mixture by using an electric stirrer to obtain a neodymium iron boron inclusion body wrapping the superhard abrasive material micro powder;
thirdly, adding all neodymium iron boron inclusions into deionized water with the mass 5 times that of the neodymium iron boron inclusions, and then carrying out ultrasonic stirring for 20 minutes; gradually adding the anti-precipitant in the stirring process, and continuously performing ultrasonic stirring for 15 minutes after all the anti-precipitant is added to obtain a jelly;
step four, adding a thixotropic agent into the jelly obtained in the step three, and further performing ultrasonic stirring for 20 minutes to obtain a water-based magnetic particle coated abrasive;
putting the water-based magnetic particle coated abrasive into a vacuum drier for vacuum drying for 6 hours, and cooling to obtain the neodymium iron boron magnetic particle coated abrasive;
step six, sequentially crushing, ball-milling, vacuum drying and cooling the neodymium iron boron magnetic particle coated abrasive obtained in the step five to obtain neodymium iron boron magnetic particle coated coarse particles;
step seven, performing ball milling on the coarse particles wrapped by the neodymium iron boron magnetic particles again, and then screening by using a 2000-mesh screen to obtain micro powder particles wrapped by the neodymium iron boron magnetic particles;
and step eight, pouring the base solution into the micro powder particles coated by the neodymium iron boron magnetic particles, carrying out electromechanical stirring for 15 minutes, and then carrying out ultrasonic stirring for 20 minutes to obtain the superhard abrasive polishing solution coated by the neodymium iron boron magnetic particles.
2. The magnetic polishing solution suitable for die-casting aluminum alloy materials according to claim 1, characterized in that: the particle size of the neodymium iron boron magnetic powder is 5 mu m.
3. The magnetic polishing solution suitable for die-casting aluminum alloy materials according to claim 1, characterized in that: the super-hard abrasive micro powder is diamond micro powder or cubic boron nitride micro powder, and the granularity is 5 mu m.
4. The magnetic polishing solution suitable for die-casting aluminum alloy materials according to claim 1, characterized in that: the base liquid is vegetable oil.
5. The magnetic polishing solution suitable for die-casting aluminum alloy materials according to claim 4, wherein: the vegetable oil is corn oil, peanut oil or castor oil.
6. The magnetic polishing solution suitable for die-casting aluminum alloy materials according to claim 1, characterized in that: the anti-settling agent is diatomite.
7. The magnetic polishing solution suitable for die-casting aluminum alloy materials according to claim 1, characterized in that: in the second step, the stirring speed of the electric stirrer is 1000r/min, and in the eighth step, the stirring speed of the electric stirrer is 500 r/min.
8. The magnetic polishing solution suitable for die-casting aluminum alloy materials according to claim 1, characterized in that: the ultrasonic power of the ultrasonic stirring is 200W.
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| CN114214033B (en) * | 2021-12-08 | 2023-06-27 | 绍兴自远磨具有限公司 | Magnetic abrasive for workpiece grinding and preparation process thereof |
| CN114807945B (en) * | 2022-04-18 | 2024-04-05 | 广东红日星实业有限公司 | Aluminum alloy fine polishing composition, fine polishing liquid, preparation method and application thereof |
| CN114752306A (en) * | 2022-04-19 | 2022-07-15 | 长沙埃福思科技有限公司 | Ferromagnetic polishing solution for integrated display screen and preparation method thereof |
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| CN1188486C (en) * | 2003-05-09 | 2005-02-09 | 沈阳大学 | Compound phase magnetic grinding abrasive |
| CN100447913C (en) * | 2006-10-10 | 2008-12-31 | 武汉理工大学 | Stable water based magnetic rheologic liquid, and preparation method |
| CN101139504B (en) * | 2007-10-30 | 2010-11-03 | 西安工业大学 | Magnetorheologicai polishing liquid and preparation method thereof |
| CN101260279A (en) * | 2008-04-24 | 2008-09-10 | 中国人民解放军国防科学技术大学 | Low viscosity stability non-water-base magnetic rheology polishing liquid and preparation method thereof |
| CN101638782B (en) * | 2009-07-09 | 2011-08-03 | 中国科学院宁波材料技术与工程研究所 | Chemical polishing solution of sintered NdFeB permanent magnet material and processing method |
| CN101870851B (en) * | 2010-06-02 | 2013-01-30 | 浙江工业大学 | Chemico-mechanical polishing liquid and polishing method |
| CN103450846A (en) * | 2012-05-30 | 2013-12-18 | 际华三五二二装具饰品有限公司 | Grinding agent for polishing metal tools |
| CN103192297B (en) * | 2012-08-24 | 2016-09-21 | 广东工业大学 | A kind of chemical cluster magneto-rheological combined processing method of single crystal silicon carbide wafer |
| CN104875106A (en) * | 2015-05-07 | 2015-09-02 | 安徽万磁电子有限公司 | Grinding and polishing process and abrasive for inner bore of small circular ring sintered NdFeB magnet |
| CN106433478B (en) * | 2016-07-07 | 2019-01-04 | 中国科学院光电技术研究所 | One kind being suitable for CaF2The magnetic fluid polishing fluid and preparation method of material Ultra-smooth machining |
| CN108148505B (en) * | 2016-12-06 | 2021-01-19 | 江苏天一超细金属粉末有限公司 | Method for manufacturing composite particles for magnetorheological polishing |
| CN110016322A (en) * | 2019-05-09 | 2019-07-16 | 东莞市中微纳米科技有限公司 | Micron order magnetic coupling abrasive material and water-base magnetic rheology polishing liquid |
| CN111266938B (en) * | 2020-03-26 | 2021-11-12 | 平湖市鼎天机械有限责任公司 | Workpiece polishing method |
| CN111653409A (en) * | 2020-07-20 | 2020-09-11 | 苏州传洋机电科技有限公司 | Fluorocarbon-based compound high-temperature-resistant magnetorheological fluid and preparation method thereof |
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