Electrode preparation process for depositing diamond abrasive tool with electric sparks

A technology of electric spark deposition and diamond, which is applied in metal processing equipment, grinding/polishing equipment, grinding equipment, etc., can solve the problems of inability to obtain high abrasive concentration, poor process repeatability, easy oxidation and failure electrode resistance, etc., to achieve High density, uniformity and low resistance

Inactive Publication Date: 2011-11-23
刘小磐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The density of the electrode material prepared by this process has a great relationship with the molding pressure and sintering temperature, the process repeatability is poor, and the diamond in the electrode component is not protected by inorganic coating, and it is easy to oxidize and...

Method used

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  • Electrode preparation process for depositing diamond abrasive tool with electric sparks
  • Electrode preparation process for depositing diamond abrasive tool with electric sparks

Examples

Experimental program
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Embodiment Construction

[0013] Soak the diamond abrasive in absolute ethanol and clean it with ultrasonic waves for one hour. The ultrasonic frequency is 2000 Hz and the power is 200 W. The diamonds are filtered out and dried for later use.

[0014] Soak the diamond after surface cleaning in the industrial aluminum sol with a concentration of 30wt% and a pH value of 3 for 5 minutes, remove the abrasive with a copper net, dry the abrasive at room temperature for 1 hour, and then dry it in an oven at 80°C for 1 hour.

[0015] Then repeat the steps of the above-mentioned sol impregnation and drying process twice

[0016] Put the surface-modified diamond into a box furnace and heat it up to 700°C at a rate of 5°C per minute for one hour, then cool down with the furnace to obtain a surface-coated Al 2 o 3 Coated diamond abrasive, spare.

[0017] Mix diamond abrasive, cobalt powder, copper powder, tungsten carbide powder, and silver powder evenly under ball milling conditions in a mass ratio of 25:20:40:...

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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 [0001] The invention relates to an electrode preparation technology for electric spark deposition. The electrode is used as an anode, and the grinding wheel substrate is used as a cathode, and a working layer of metal bond diamond grinding tool is deposited on the grinding wheel body by using electric spark discharge. Background technique [0002] At present, the preparation of diamond abrasive tools by EDM is still in the research and development stage and has not been widely used in industry. The metal anode used in EDM is prepared by mixing metal powders of different components and diamond abrasives uniformly, then cold-pressing them under certain pressure conditions, and then sintering the formed body under a protective atmosphere with a certain heat treatment system to obtain deposition. Use an anode. The density of the electrode material prepared by this process has a great relationship with the molding pressure and sintering temperature, the process r...

Claims

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Application Information

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IPC IPC(8): B22F3/14B24D18/00B23H1/00
Inventor 刘小磐
Owner 刘小磐
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