CN111168592A - Method for preparing diamond directional pulse magnetic field electroplating grinding tool - Google Patents
Method for preparing diamond directional pulse magnetic field electroplating grinding tool Download PDFInfo
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- CN111168592A CN111168592A CN202010146052.5A CN202010146052A CN111168592A CN 111168592 A CN111168592 A CN 111168592A CN 202010146052 A CN202010146052 A CN 202010146052A CN 111168592 A CN111168592 A CN 111168592A
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- 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
- B24D18/009—Tools not otherwise provided for
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Abstract
The invention provides a simple preparation method of a diamond directional pulse magnetic field electroplating grinding tool, which comprises the steps of uniformly placing a ferromagnetic phase matrix in dispersion liquid, then placing a diamond grinding material in a mixed liquid of the ferromagnetic phase and the dispersion liquid, and uniformly stirring to obtain a precursor material; drying the precursor material, and then carrying out high-temperature heat treatment to obtain the diamond abrasive material with the magnetic film on the surface; and performing composite electroplating on the magnetic diamond abrasive, and applying a pulse strong magnetic field on the electroplated needle body substrate in the steps of sanding and diamond plating to ensure that the diamonds around the needle body are orderly and directionally arranged. The method has the advantages of simple and convenient operation and simple process, and the obtained product has high sand-applying rate, thereby greatly improving the wear resistance and the service life of the diamond grinding tool.
Description
Technical Field
The invention belongs to the field of superhard product diamond grinding tool preparation, and particularly relates to a method for preparing a diamond directional pulse magnetic field electroplating grinding tool, which is applied to the superhard product field.
Background
With the progress of human science and technology and the rapid development of the mechanical industry, people have higher and higher requirements on the machining of mechanical part products, particularly the high-speed development of superhard materials, and the whole machining industry has higher and higher requirements on super-hardness grinding and cutting tools. The diamond has excellent performances of forbidden bandwidth, high breakdown field strength, high carrier mobility, low dielectric constant, good heat conducting property and the like, has the characteristics of stable chemical property, high hardness, high wear resistance, strong radiation resistance and the like, is a high-temperature and high-power wide-forbidden-band semiconductor material with development prospect, and is known as a first-choice material of fourth-generation semiconductors.
In the existing diamond electroplating industry, diamond sanding is a key process step, and sanding plays a decisive role in the polishing capacity and the service life of a diamond polishing tool. The existing composite electroplating process has the defects of difficult sand feeding, low sand feeding rate, uneven sand feeding, easy shedding of a plating layer and the like.
Therefore, the exploration of the preparation process of the diamond by the directional pulse magnetic field electroplating has important significance and value.
Disclosure of Invention
The invention aims to provide a method for preparing a diamond directional pulse magnetic field electroplating grinding tool. The method improves the defects of the prior diamond composite electroplating process, and improves the polishing efficiency and the service life of the diamond polishing product.
The purpose of the invention is realized by the following scheme: a method for preparing a diamond directional pulse magnetic field electroplating grinding tool comprises the following steps:
(1) uniformly placing the ferromagnetic phase matrix in dispersion liquid to obtain mixed liquid of the ferromagnetic phase and the dispersion liquid, wherein the dispersion liquid is mixed solution of ferric acetylacetonate and absolute ethyl alcohol, and the concentration of the ferric acetylacetonate in the absolute ethyl alcohol is 0.2-3 g/L; the ferromagnetic phase matrix is ferromagnetic particles, and the powder matrix is powder of Fe, Co, Ni and alloy thereof;
(2) placing the diamond abrasive with the particle size of 30-150 microns in the mixed solution of the ferromagnetic phase and the dispersion liquid, and uniformly stirring to obtain a precursor material;
(3) drying the precursor material, and then performing high-temperature thermal treatment to obtain a diamond abrasive material with magnetic surface;
(4) the method is characterized in that the magnetic diamond abrasive is subjected to composite electroplating, and in the steps of sanding and composite electroplating of diamond, a pulse magnetic field is applied to the electroplated needle body substrate, so that diamonds around the needle body are orderly and directionally arranged, and the sanding and diamond attachment rate is effectively improved.
In the step (3), the high-temperature heat treatment is drying treatment at 80 ℃ to obtain liquid-free powder, heating to 700 ℃ under the protection of inert atmosphere to perform heat preservation heat treatment, and naturally cooling to obtain the diamond particles with a layer of very thin magnetic film on the surface.
In the step (4), the pulsed magnetic field is applied to the needle body substrate by regulating and controlling the controllable magnetic field around the plated part substrate, so that the diamond with magnetism on the surface is deviated in the plating solution and is directionally arranged under the action of the magnetic field.
On the basis of the scheme, the ferromagnetic phase matrix needs to be pretreated, namely: the ferromagnetic matrix was exposed to Na at a concentration of 1%2CO3Fully stirring the solution for 2min, putting the solution into clear water, cleaning the solution in an ultrasonic cleaner for 10min to obtain iron powder, then putting the iron powder into an HCl solution with the concentration of 0.6% at normal temperature for activation for 1min, and washing the iron powder by deionized water.
On the basis of the scheme, the diamond particles need to be pretreated, the diamond is boiled in 3M KOH solution for 2 hours, then is cleaned and washed to be neutral, is kept at 80 ℃ in 1M nitric acid and is boiled for 2 hours, is washed to be neutral and is dried for later use.
The invention provides a diamond polishing needle prepared according to the method.
The invention provides a simple preparation method of a diamond directional pulse magnetic field electroplating grinding tool and a product thereof, which are used for the grinding tool.
The invention has the advantages that: the method solves the defects of low diamond sanding rate, uneven sanding, irregular diamond arrangement and the like in the existing composite electroplating sanding process, is simple and convenient to operate and simple in process, and the obtained product has high sanding rate, thereby greatly improving the wear resistance and the service life of the diamond polishing tool.
Drawings
FIG. 1 is an SEM image of a 140 μm diamond grinding pin of an example, wherein diamond particles on the surface of a plated part are uniformly distributed, the particle size is about 40 μm, and the diamond particles are arranged in order;
FIG. 2 is an SEM image of a 270 micron diamond grinding pin of an example, wherein diamond particles on the surface of a plated part are uniformly distributed, the particle size is about 70 microns, and the diamond particles are arranged in order;
FIG. 3 is an SEM image of a 3150 micron diamond grinding pin of the example, wherein diamond particles on the surface of a plating part are uniformly distributed, the particle size is about 150 microns, and the diamond particles are arranged in order.
Detailed Description
The present invention is described in detail by the following specific examples, but the scope of the present invention is not limited to these examples.
Example 1
A diamond polishing needle plating piece is prepared by the following steps:
firstly, preprocessing a ferromagnetic phase matrix and diamond particles: boiling about 40 microns of diamond abrasive in 3M KOH solution for 2 hours, then cleaning and washing to be neutral, then boiling in 1M nitric acid at 80 ℃ for 2 hours, washing to be neutral, and airing for later use; the ferromagnetic matrix was exposed to Na at a concentration of 1%2CO3Fully stirring the solution for 2min, placing the solution in clear water, cleaning the solution in an ultrasonic cleaner for 10min, then placing the iron powder in HCl solution with the concentration of 0.6% at normal temperature for activation for 1min, and washing the iron powder by deionized water for later use.
(1) Uniformly placing the ferromagnetic phase matrix in dispersion liquid to obtain mixed liquid of the ferromagnetic phase and the dispersion liquid, wherein the dispersion liquid is mixed solution of ferric acetylacetonate and absolute ethyl alcohol, and the concentration of the ferric acetylacetonate in the absolute ethyl alcohol is 0.2-3 g/L; the ferromagnetic phase matrix is ferromagnetic particles, and the powder matrix is powder of Fe, Co, Ni and alloy thereof;
(2) placing the diamond abrasive with the grain size of 40 microns after pretreatment into a mixed solution of a ferromagnetic phase and a dispersion liquid, and uniformly stirring to obtain a precursor material;
(3) drying the precursor material at 80 ℃, and then performing high-temperature heat treatment, wherein the high-temperature treatment temperature is 700 ℃, the heat preservation time is 3 hours, and the heating rate is 5 ℃ per minute, so as to obtain the diamond abrasive material with magnetism on the surface;
(4) and carrying out composite electroplating on the diamond abrasive with magnetism, wherein the sanding time is 2h, applying a pulse magnetic field on the electroplated needle body substrate in the sanding and composite electroplating diamond steps, stopping applying the magnetic field after sanding for one hour, enabling the diamonds around the needle body to be orderly and directionally arranged, and obtaining the diamond plated part after the composite electroplating thickening step. The SEM of the obtained product is shown in figure 1, and the diamond particles on the surface of the plating piece are uniformly distributed, the particle size is about 40 microns, the diamond particles are arranged regularly, and the edges and corners are clear.
Example 2
A diamond grinding pin, similar to example 1, was prepared by the following steps:
firstly, preprocessing a ferromagnetic phase matrix and diamond particles: boiling about 70 microns of diamond abrasive in 3M KOH solution for 2 hours, then cleaning and washing to be neutral, then boiling in 1M nitric acid at 80 ℃ for 2 hours, washing to be neutral, and airing for later use; the ferromagnetic matrix was exposed to Na at a concentration of 1%2CO3Fully stirring the solution for 2min, placing the solution in clear water, cleaning the solution in an ultrasonic cleaner for 10min, then placing the iron powder in HCl solution with the concentration of 0.6% at normal temperature for activation for 1min, and washing the iron powder by deionized water for later use.
(1) Uniformly placing the ferromagnetic phase matrix in a dispersion liquid, wherein the dispersion liquid is a solution of ferric acetylacetonate in absolute ethyl alcohol with the concentration of 2g/L, and obtaining a mixed solution of the ferromagnetic phase and the dispersion liquid;
(2) placing the pretreated 70-micron diamond abrasive in a mixed solution of a ferromagnetic phase and a dispersion liquid, and uniformly stirring to obtain a precursor material;
(3) drying the precursor material at 80 ℃, performing high-temperature heat treatment, keeping the temperature at 700 ℃ for 3h at the heating rate of 5 ℃ per minute, and obtaining the diamond abrasive material with magnetism on the surface;
(4) and carrying out composite electroplating on the diamond abrasive with magnetism, wherein the sanding time is 2h, applying a pulse magnetic field on the electroplated needle body substrate in the whole sanding and composite electroplating diamond step, stopping applying the magnetic field after sanding for one hour, and obtaining the diamond plated part after the composite electroplating thickening step. The SEM of the obtained product is shown in FIG. 2, and it can be seen that diamond particles on the surface of the plating part are uniformly distributed, the particle size is about 70 microns, and the diamond particles are arranged regularly and have clear edges and corners.
Example 3
A diamond grinding pin, similar to example 1, was prepared by the following steps:
firstly, preprocessing a ferromagnetic phase matrix and diamond particles: boiling a diamond abrasive material of about 150 microns in a 3M KOH solution for 2h, then cleaning, washing to be neutral, then boiling in 1M nitric acid at 80 ℃ for 2h, washing to be neutral, and airing for later use; the ferromagnetic matrix was exposed to Na at a concentration of 1%2CO3Fully stirring the solution for 2min, placing the solution in clear water, cleaning the solution in an ultrasonic cleaner for 10min, then placing the iron powder in HCl solution with the concentration of 0.6% at normal temperature for activation for 1min, and washing the iron powder by deionized water for later use.
(1) Uniformly placing the ferromagnetic phase matrix in dispersion liquid to obtain mixed liquid of the ferromagnetic phase and the dispersion liquid, wherein the dispersion liquid is solution of ferric acetylacetonate in absolute ethyl alcohol, and the concentration of the solution is 2 g/L;
(2) placing the pretreated diamond abrasive in a mixed solution of a ferromagnetic phase and a dispersion liquid, and uniformly stirring to obtain a precursor material;
(3) drying the precursor material at 80 ℃, performing high-temperature heat treatment, keeping the temperature at 700 ℃ for 3h at the heating rate of 5 ℃ per minute, and obtaining the diamond abrasive material with magnetism on the surface;
(4) and carrying out composite electroplating on the diamond abrasive with magnetism, wherein the sanding time is 2h, in the whole sanding and composite electroplating diamond step, applying a pulse magnetic field on the electroplated needle body substrate, stopping applying the magnetic field after sanding for one hour, and obtaining a diamond plated part product after the composite electroplating thickening step. The SEM of the obtained product is shown in FIG. 3, and it can be seen that diamond particles on the surface of the plating part are uniformly distributed, the particle size is about 150 microns, and the diamond particles are arranged regularly and have clear edges and corners.
Claims (6)
1. A preparation method of a diamond directional pulse magnetic field electroplating grinding tool is characterized by comprising the following steps:
(1) uniformly placing the ferromagnetic phase matrix in dispersion liquid to obtain mixed liquid of the ferromagnetic phase and the dispersion liquid, wherein the dispersion liquid is mixed solution of ferric acetylacetonate and absolute ethyl alcohol, and the concentration of the ferric acetylacetonate in the absolute ethyl alcohol is 0.2-3 g/L; the ferromagnetic phase matrix is ferromagnetic particles, and the powder matrix is powder of Fe, Co, Ni and alloy thereof;
(2) placing the diamond abrasive with the particle size of 30-150 microns in the mixed solution of the ferromagnetic phase and the dispersion liquid, and uniformly stirring to obtain a precursor material;
(3) drying the precursor material, and then performing high-temperature thermal treatment to obtain a diamond abrasive material with magnetic surface;
(4) and performing composite electroplating on the diamond abrasive with magnetism, and applying a pulse magnetic field on the electroplated needle body substrate in the steps of sanding and composite electroplating of diamond to ensure that the diamonds around the needle body are orderly and directionally arranged.
2. The method for preparing a diamond directional pulsed magnetic field electroplating grinding tool according to claim 1, wherein in the step (3), the high-temperature heat treatment is drying treatment at 80 ℃ to obtain liquid-free powder, then heating to 700 ℃ under the protection of inert atmosphere for heat preservation heat treatment, and then naturally cooling to obtain the diamond particles with a thin magnetic film layer on the surface.
3. The method for preparing a diamond directional pulse magnetic field electroplating grinding tool according to claim 1, wherein in the step (4), the pulse magnetic field is applied to the needle body substrate by regulating and controlling a controllable magnetic field around the plated part substrate, so that the diamond with magnetic surface is deviated in the plating solution and is directionally arranged under the action of the magnetic field.
4. The method of claim 1, wherein the ferromagnetic phase matrix is pre-treated by: the ferromagnetic matrix was exposed to Na at a concentration of 1%2CO3Fully stirring the solution for 2min, putting the solution into clear water, cleaning the solution in an ultrasonic cleaner for 10min to obtain iron powder, then putting the iron powder into an HCl solution with the concentration of 0.6% at normal temperature for activation for 1min, and washing the iron powder by deionized water.
5. A method for preparing a diamond directional pulse magnetic field electroplating grinding tool according to claim 1, wherein diamond particles need to be pretreated, the diamond is boiled in 3M KOH solution for 2h, then cleaned and washed to be neutral, then boiled in 1M nitric acid at 80 ℃ for 2h, washed to be neutral, and then dried for later use.
6. A diamond grinding needle obtained by the method for manufacturing the diamond directional pulse magnetic field electroplating grinding tool according to any one of the claims 1 to 5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888729A (en) * | 2022-05-09 | 2022-08-12 | 安徽亚珠金刚石股份有限公司 | Single crystal diamond abrasive particle preparation facilities |
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| US5250084A (en) * | 1992-07-28 | 1993-10-05 | C Four Pty. Ltd. | Abrasive tools and process of manufacture |
| CN102649834A (en) * | 2012-03-21 | 2012-08-29 | 南京邮电大学 | Preparation method of water-soluble magnetic nanocomposite material with fluorescent property |
| CN103110965A (en) * | 2013-01-30 | 2013-05-22 | 北京大学 | Ferroferric oxide nanometer material as well as preparation method and application thereof |
| CN103173840A (en) * | 2013-03-12 | 2013-06-26 | 白鸽磨料磨具有限公司 | Method for producing grinding electroplated diamond wheel |
| CN104191385A (en) * | 2014-09-05 | 2014-12-10 | 南京航空航天大学 | Ferromagnetic diamond abrasive material prepared by means of wet method |
| CN106111202A (en) * | 2016-06-27 | 2016-11-16 | 高大元 | A kind of coconut husk load Nano-Zinc ferrite composite material preparation method |
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2020
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5250084A (en) * | 1992-07-28 | 1993-10-05 | C Four Pty. Ltd. | Abrasive tools and process of manufacture |
| CN102649834A (en) * | 2012-03-21 | 2012-08-29 | 南京邮电大学 | Preparation method of water-soluble magnetic nanocomposite material with fluorescent property |
| CN103110965A (en) * | 2013-01-30 | 2013-05-22 | 北京大学 | Ferroferric oxide nanometer material as well as preparation method and application thereof |
| CN103173840A (en) * | 2013-03-12 | 2013-06-26 | 白鸽磨料磨具有限公司 | Method for producing grinding electroplated diamond wheel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888729A (en) * | 2022-05-09 | 2022-08-12 | 安徽亚珠金刚石股份有限公司 | Single crystal diamond abrasive particle preparation facilities |
| CN114888729B (en) * | 2022-05-09 | 2023-08-11 | 安徽亚珠金刚石股份有限公司 | Single crystal diamond abrasive grain preparation facilities |
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