CN102248166A - Electrode preparation process for depositing diamond abrasive tool with electric sparks - Google Patents
Electrode preparation process for depositing diamond abrasive tool with electric sparks Download PDFInfo
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- CN102248166A CN102248166A CN2010101730677A CN201010173067A CN102248166A CN 102248166 A CN102248166 A CN 102248166A CN 2010101730677 A CN2010101730677 A CN 2010101730677A CN 201010173067 A CN201010173067 A CN 201010173067A CN 102248166 A CN102248166 A CN 102248166A
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Abstract
The invention relates to an electrode preparation process for depositing a diamond abrasive tool with electric sparks, comprising the steps of: dipping a diamond abrasive material into anhydrous ethanol for ultrasonic cleaning; then dipping a diamond in industrial aluminum sol for 5 min; fishing out the abrasive material with a copper wire mesh; repeating the steps twice after the abrasive material is dried; placing surface-modified diamond into a box-type furnace; raising temperature to 700 DEG C at a temperature rise rate of 5 DEG C per min; keeping warm for 1 h, cooling together with the furnace to obtain the diamond abrasive material with an Al2O3 coating coated on the surface; uniformly mixing the diamond abrasive material, cobalt powder, copper powder, tungsten carbide powder and silver powder in the mass ratio of 25: 20: 40: 10: 5 under ball milling conditions; adding a mixed electrode raw material to a cylindrical graphite die, wherein the inner bore diameter of the die is 20mm; sintering the cylindrical graphite die on an SM80 sintering machine, wherein the pressure at two ends of the die is 15KN, the voltage is 10V; keeping warm for 5 min when the temperature reaches 800 DEG C, stopping heating the die; and cooling naturally to obtain an electrode material. The electrode material structure prepared by utilizing the process has favorable consistency and high diamond abrasive material content; and the diamond abrasive tool with uniform structure and high abrasive material concentration can be deposited by utilizing the electrode.
Description
Technical field
The invention of this reality relates to a kind of electric spark deposition electrode fabrication, and as anode, grinding wheel base body is a negative electrode with this electrode, utilizes spark discharge can deposit layer of metal binder diamond grinding tool working lining on the emery wheel body.
Background technology
At present, at present the electric spark deposition technology prepares diamond abrasive tool and also is in development not in industrial widespread adoption.The metal dust of the employed metal anode its preparation method employing of electric spark deposition different component and diamond abrasive mix back base substrate after cold moudling under the certain pressure condition is then with moulding and obtain the deposition anode with certain heat treating regime sintering under protective atmospheres.Its density of the electrode material that this technology makes and briquetting pressure and sintering temperature have very big relation, and the diamond in the electrode component of relatively poor while of process repeatability does not all adopt inorganic coating protection can't add the high content gold hard rock so can't make high abrasive concentration diamond abrasive tool yet with Wiring technology in the less so electrode of the resistance of the other electric spark deposition technological requirement of oxidation deactivation electrode easily under the high temperature action of deposition.
Summary of the invention
The technical problem that the present invention solves is, deficiency at the prior art existence, a kind of electric spark deposition diamond abrasive tool technology for preparing electrode is proposed, this process using industrial aluminum colloidal sol with the mode of dip-coating electrode apply with diamond surface one deck sol pellicle then the diamond abrasive of filming is heat-treated obtain diamond abrasive that the surface coats the fine and close alundum (Al film of one deck then the abrasive material after the modification mix hot pressed sintering acquisition electrode material in the graphite jig of then powder being packed into by ball milling with other metal dusts.The electric spark deposition that this technology makes can prepare the high concentration diamond abrasive tool with the electrode material of the even good reproducibility resistance of electrode material structure pressureless sintering.
Technical solution of the present invention is that described electric spark deposition is with the step of preparation process of electrode material:
(1) elder generation is soaked in diamond abrasive in the absolute ethyl alcohol and cleaned one hour with ultrasonic wave, and ultrasonic frequency is 2000Hz, and power 200W, diamond leach the back oven dry.
(2) diamond behind the cleaning surfaces being soaked in concentration is 30wt%, and pH value is in 3 the industrial aluminum colloidal sol 5 minutes, pulls abrasive material out with copper mesh, abrasive material at room temperature dry 1 hour in 80 ℃ of baking ovens dry 1 hour again.
(3) repeat above-mentioned steps 2 twice;
(4) diamond after the surface modification is put into batch-type furnace and be warming up to 700 ℃ of insulations 1 hour,, obtain the diamond abrasive that the surface coats the Al2O3 coating with the stove cooling with the heating rate of 5 ℃ of per minutes.
(5) with diamond abrasive and cobalt powder, copper powder, tungsten carbide powder, silver powder in mass ratio 25: 20: 40: 10: 5 ratio mixes under ball milling condition, and ballstone is plastics, ball milling altar diameter 500mm, rotating speed 50r/ branch, 1 hour ball milling time.
(6) electrode material that mixes is added in the cylindricality graphite jig, mould diameter of bore 20mm, on the SM80 sintering machine, carry out sintering, both mold ends pressure is 15KN, voltage is 10V, measures the graphite jig outside wall temperature with infrared radiation thermometer, insulation 5min when temperature reaches 800 ℃, stop heating mould and cool off naturally, obtain electrode material.
The present invention adopts sol-gel process earlier diamond abrasive to be carried out modification, the abrasive material after the modification is mixed hot pressed sintering in graphite jig with other component powders again.Under sintering temperature, metal dust can produce certain flowability, realizes the homogenising of electrode material, the electrode material density height of while hot pressed sintering, resistance is little, can add more multi-diamond in the prescription, can deposit high concentration metal-bonded diamond grinding tool with this electrode.
As known from the above, the present invention is electric spark deposition diamond abrasive tool technology for preparing electrode, and it can prepare the institutional framework unanimity, the electrode material that diamond abrasive content is high (referring to Fig. 1).Utilize this electrode electric spark deposition diamond abrasive tool, the structural homogeneity and the abrasive concentration of grinding tool all increase (referring to Fig. 2).
The specific embodiment:
Diamond abrasive is soaked in the absolute ethyl alcohol with ultrasonic wave cleaned one hour, ultrasonic frequency is 2000Hz, and power 200W, diamond leach the back dry for standby.
It is 30wt% that diamond behind the cleaning surfaces is soaked in concentration, and pH value is in 3 the industrial aluminum colloidal sol 5 minutes, pulls abrasive material out with copper mesh, abrasive material at room temperature dry 1 hour, in 80 ℃ of baking ovens dry 1 hour again.
Step according to above-mentioned sol impregnation drying process repeats twice again
Diamond after the surface modification is put into batch-type furnace be warming up to 700 ℃ of insulations one hour,, obtain the surface and coat Al with the stove cooling with the heating rate of 5 ℃ of per minutes
2O
3The diamond abrasive of coating, standby.
With diamond abrasive and cobalt powder, copper powder, tungsten carbide powder, silver powder in mass ratio 25: 20: 40: 10: 5 ratio mixes under ball milling condition, and ballstone is plastics, ball milling altar diameter 500mm, rotating speed 50r/ branch, 1 hour ball milling time.
The electrode material that mixes is added in the cylindricality graphite jig, mould diameter of bore 20mm, on the SM80 sintering machine, carry out sintering, both mold ends pressure is 15KN, voltage is 10V, measures the graphite jig outside wall temperature with infrared radiation thermometer, and insulation is 5 minutes when temperature reaches 800 ℃, stop heating mould and cool off naturally, obtain electrode material.
Claims (2)
1. an electric spark deposition diamond abrasive tool electrode is characterized in that, adopts following proportioning: (by weight percentage) 25% diamond, 20% cobalt powder, 40% copper powder, 10% tungsten carbide powder, 5% silver powder.
2. according to the described electric spark deposition diamond abrasive tool of claim 1 electrode process, it is characterized in that: the electrode material that mixes is added in the cylindricality graphite jig, mould diameter of bore 20mm, carry out sintering on the SM80 sintering machine, both mold ends pressure is 15KN, and voltage is 10V, measure the graphite jig outside wall temperature with infrared radiation thermometer, insulation 5min stops heating mould and cools off naturally when temperature reaches 800 ℃, obtains electrode material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101730677A CN102248166A (en) | 2010-05-17 | 2010-05-17 | Electrode preparation process for depositing diamond abrasive tool with electric sparks |
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| CN2010101730677A CN102248166A (en) | 2010-05-17 | 2010-05-17 | Electrode preparation process for depositing diamond abrasive tool with electric sparks |
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| CN102248166A true CN102248166A (en) | 2011-11-23 |
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| CN105081989A (en) * | 2015-08-27 | 2015-11-25 | 安徽威铭耐磨材料有限公司 | Compact superfine granularity CBN grinding wheel with high breathability performance and high heat insulation performance and preparation method of compact superfine granularity CBN grinding wheel |
| CN105081991A (en) * | 2015-08-27 | 2015-11-25 | 安徽威铭耐磨材料有限公司 | High anti-corrosion and temperature-changing resistant cubic boron nitride (CBN) grinding wheel with superfine granularity and preparation method thereof |
| CN105108664A (en) * | 2015-08-28 | 2015-12-02 | 安徽威铭耐磨材料有限公司 | High-grinding-precision ultra-fine granularity CBN grinding wheel with damping and noise reduction functions and preparing method thereof |
| CN105108663A (en) * | 2015-08-27 | 2015-12-02 | 安徽威铭耐磨材料有限公司 | Self-lubrication ultra-fine-granularity CBN grinding wheel containing aquadag and preparation method of self-lubrication ultra-fine-granularity CBN grinding wheel |
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| CN111618297A (en) * | 2020-04-21 | 2020-09-04 | 陕西斯瑞新材料股份有限公司 | Preparation method of rapid sintering forming silver-based contact |
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2010
- 2010-05-17 CN CN2010101730677A patent/CN102248166A/en active Pending
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| CN105081991A (en) * | 2015-08-27 | 2015-11-25 | 安徽威铭耐磨材料有限公司 | High anti-corrosion and temperature-changing resistant cubic boron nitride (CBN) grinding wheel with superfine granularity and preparation method thereof |
| CN105215864A (en) * | 2015-08-27 | 2016-01-06 | 安徽威铭耐磨材料有限公司 | A kind of low-thermal-expansion heat-resistance type Ultra-fine CBN emery wheel containing Nano diamond and preparation method thereof |
| CN105081989A (en) * | 2015-08-27 | 2015-11-25 | 安徽威铭耐磨材料有限公司 | Compact superfine granularity CBN grinding wheel with high breathability performance and high heat insulation performance and preparation method of compact superfine granularity CBN grinding wheel |
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| CN109158718A (en) * | 2018-11-08 | 2019-01-08 | 上海江南轧辊有限公司 | Preparation method, the preparation method of tool-electrode and tool-electrode of electrode tip |
| CN109128199B (en) * | 2018-11-14 | 2022-02-01 | 广东石油化工学院 | Electrode and method for preparing iron-aluminum intermetallic compound coating |
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Application publication date: 20111123 |