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CBN grinding wheel

A grinding wheel and ceramic-based technology, applied in abrasives, metal processing equipment, grinding devices, etc., can solve problems such as difficulty in adapting to high-speed grinding, poor thermal conductivity of SiC, and easy sticking of grinding wheels to increase grinding efficiency. Chip sticking phenomenon of deformed grinding wheel, effect of good lubricity

Inactive Publication Date: 2011-11-16
佛山市华南精密制造技术研究开发院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent ZL200310116239.7 discloses a ceramic-based CBN grinding wheel, which uses CBN and black SiC as abrasives. However, due to the poor thermal conductivity of SiC, the grinding wheel is easy to stick chips in high-speed grinding, and it is difficult to adapt to high-speed grinding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The composition of the grinding wheel: 76% abrasive, 20% binder, dextrin powder, 2% methyl cellulose solution, walnut shell powder.

[0009] Among them, the abrasive ratio: CBN abrasive 60%, AlN abrasive 40%, and the particle size is 170 / 200.

[0010] The binder is 270-mesh glass-ceramic powder, and its ratio is as follows: SiO 2 : 30%, Al 2 o 3 : 22%, B 2 o 3 : 20%, Na 2 O: 15%, K 2 O: 7%, LiF: 6%.

[0011] Wet the abrasive grains with methylcellulose solution first, then add binder, dextrin powder and walnut shell powder, mix thoroughly for more than 30 minutes, and pass through a 60-mesh sieve to make a grinding wheel molding material. Put the grinding wheel molding material into the mold and press it into a circular cylindrical shape. After natural drying for 24 hours, put it into a drying oven to dry, and keep the temperature at 110° C. for 1 hour. After drying, put it into a high-temperature sintering furnace for sintering at a sintering temperature of 80...

Embodiment 2

[0014] The composition of the grinding wheel: 70% of abrasive, 26% of binder, 2% of dextrin powder, and 2% of methyl cellulose solution.

[0015] Among them, the abrasive ratio: 90% CBN abrasive, 10% AlN abrasive, and the particle size is 140 / 170.

[0016] 270-mesh glass-ceramic powder is used as the binder, and its ratio is as follows: SiO 2 : 35%, Al 2 o 3 : 25%, B 2 o 3 : 19%, Na 2 O: 10%, K 2 O: 5%, LiF: 6%.

[0017] Wet the abrasive grains with methylcellulose solution first, then add binder and dextrin powder, mix thoroughly for more than 30 minutes, and pass through a 60-mesh sieve to make a grinding wheel molding material. Put the grinding wheel molding material into the mold and press it into a small arc sheet. After natural drying for 24 hours, put it into a drying oven to dry, and keep the temperature at 110° C. for 1 hour. After drying, put it into a high-temperature sintering furnace for sintering at a sintering temperature of 820°C and keep it warm for 2...

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PUM

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Abstract

The invention discloses a CBN grinding wheel which adopts CBN and AlN as main abradant and comprises a binder, an abradant and other additives and belongs to the scope of ultrahard abrasive tools. The invention is characterized in that the abradant is composed of 60-90% of CBN by mass percent and 10-40% of AlN by mass percent; the formula of the grinding wheel is as follows by mass percent: 70-77% of abrasive, 20-26% of binder and 3-4% of other additives. The product of the invention has good heat conductivity, good self-lubricity of the abrasive, high grinding efficiency, long service life and high processing precision of workpieces, thus being applicable to high-speed grinding.

Description

technical field [0001] The invention relates to a novel ceramic-based CBN grinding wheel for grinding metal workpieces. Background technique [0002] With the development of industry, the requirements for processing precision and processing speed of steel and other mechanical parts are increasing day by day, and CBN precision processing tools have become a hot research and development hotspot in the world. CBN grinding tools have good processing precision and high grinding efficiency. Patent ZL200310116239.7 discloses a ceramic-based CBN grinding wheel, which uses CBN and black SiC as abrasives. However, due to the poor thermal conductivity of SiC, the grinding wheel is prone to sticking chips during high-speed grinding, and it is difficult to adapt to high-speed grinding. AlN has excellent thermal conductivity and lubricity, and its abrasive grain hardness is the same as that of Al 2 o 3 The hardness of the abrasive grains is similar, so the ceramic-based CBN grinding wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/00B24D3/04B24D3/34B24D18/00
Inventor 王双喜李艳平孙家森周建民刘雪敬
Owner 佛山市华南精密制造技术研究开发院
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