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Cubic boron nitride (CBN) ceramic high speed grinding wheel and preparation method and application

A high-speed, grinding wheel technology, applied in the field of mechanical equipment, can solve problems such as affecting the cutting efficiency of grinding wheels

Active Publication Date: 2012-12-12
沈阳中科超硬磨具磨削研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CBN sharp angle and strength affect the cutting efficiency of grinding wheel

Method used

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  • Cubic boron nitride (CBN) ceramic high speed grinding wheel and preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Preparation of low temperature binder

[0027] 1. Preparation of pre-melted ceramic powder:

[0028] According to the material ratio (by volume ratio): aluminum oxide 25, silicon dioxide 32, sodium oxide 5.5, potassium oxide 1.5, magnesium oxide 2, calcium oxide 1.2, diboron trioxide 5 After the raw materials are mixed, after 1600 Heat preservation and firing for 2 hours at high temperature, then water cooling, crushing, passing through a 240 standard sieve, sieving the powder, and drying to obtain pre-melted ceramic powder;

[0029] 2. Preparation of low temperature binder:

[0030] According to the material ratio (volume ratio): nano-scale aluminum oxide 8, nano-scale silicon dioxide 10, pre-melted ceramic powder 85, the raw materials are mixed, mixed evenly by ball milling, and the obtained product is a low-temperature binder;

[0031] 2. Preparation of working abrasive layer:

[0032] Weigh the abrasive layer (by volume) according to the following proportions:...

Embodiment 2

[0034] 1. Preparation of low temperature binder

[0035] 1. Preparation of pre-melted ceramic powder:

[0036] According to the material ratio (by volume ratio): aluminum oxide 35, silicon dioxide 37, sodium oxide 4.5, potassium oxide 2.5, magnesium oxide 2.5, calcium oxide 0.8, boron trioxide 11 After mixing the raw materials, the Heat preservation and firing for 2 hours at high temperature, then water cooling, crushing, passing through a 240 standard sieve, sieving the powder, and drying to obtain pre-melted ceramic powder;

[0037] 2. Preparation of low temperature binder:

[0038] According to the material ratio (volume ratio): nano-scale aluminum oxide 12, nano-scale silicon dioxide 12, pre-melted ceramic powder 75, the raw materials are mixed, mixed evenly by ball milling, and the obtained product is a low-temperature binder;

[0039] 2. Preparation of working abrasive layer:

[0040] Weigh the abrasive layer (by volume) according to the following proportions: low-tem...

Embodiment 3

[0042] 1. Preparation of low temperature binder

[0043] 1. Preparation of pre-melted ceramic powder:

[0044] According to the material ratio (by volume): aluminum oxide 30, silicon dioxide 27, sodium oxide 5, potassium oxide 2, magnesium oxide 1.5, calcium oxide 1, boron trioxide 8, after mixing the raw materials, Heat preservation and firing at 1600°C for 2 hours, then water cooling, crushing, passing through a 240 standard sieve, sieving the powder, and drying to obtain pre-melted ceramic powder;

[0045] 2. Preparation of low temperature binder:

[0046] According to the material ratio (volume ratio): nano-scale aluminum oxide 10, nano-scale silicon dioxide 80, pre-melted ceramic powder 80, the raw materials are mixed, mixed evenly by ball milling, and the obtained product is a low-temperature binder;

[0047] 2. Preparation of working abrasive layer:

[0048] Weigh the abrasive layer (by volume) according to the following proportions: low-temperature bond 35, white co...

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Abstract

The invention discloses a cubic boron nitride (CBN) ceramic high speed grinding wheel which comprises a steel substrate and a working abrasive layer. The working abrasive layer comprises an abrasive layer and a middle transition layer. The abrasive layer comprises the following materials: low temperature binding agent, white corundum, ceramic floating bead and CBN. The middle transition layer comprises the following materials: low temperature binding agent and 150-mesh ceramic balls. The low temperature binding agent includes the following materials by volume: 8-12 parts of nanoscale aluminumoxide, 8-12 parts of nanoscale silica and 75-85 parts of premelting ceramic powder. The premelting ceramic powder includes the following materials by volume: 25-35 parts of aluminum oxide, 27-37 parts of silica, 4.5-5.5 parts of sodium oxide, 1.5-2.5 parts of potassium oxide, 1.5-2.5 parts of magnesium oxide, 0.8 part to 1.2 parts of calcium oxide and 5-11 parts of diboron trioxide. The CBN ceramic high speed grinding wheel has the advantages that firing temperature of the ceramic binding agent is 750 DEG C, rupture strength can reach 115MPa, and the CBN strength is basically not lost under the temperature, so that cutting performance of the CBN grinding wheel is greatly improved. A preparation method and the application of the CBN ceramic high speed grinding wheel are further provided.

Description

technical field [0001] The invention relates to the field of mechanical equipment, in particular to a CBN (cubic boron nitride) ceramic high-speed grinding wheel, more specifically to a CBN ceramic high-speed grinding wheel for high-speed grinding of crankshaft pins of energy-saving high-end automobiles and a preparation method thereof. Background technique [0002] Due to the impact of various factors such as rising oil prices, rising raw material costs, appreciation of the renminbi, and various national preferential policies for energy-saving vehicles, the market is increasingly calling for environmental protection and energy-saving new energy vehicles. This requires the performance of the automobile engine to be more and more excellent. As an important part of the engine, the precision of the machining of the camshaft and crankshaft directly affects the energy-saving effect of the engine. At present, there is no molding technology for this aspect in China. It is urgent to ...

Claims

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Application Information

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IPC IPC(8): C04B35/5831C04B35/622
Inventor 吕升东李猛李延海王昆郑勇阁
Owner 沈阳中科超硬磨具磨削研究所
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