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Cubic boron nitride (CBN) grinding wheel preparing method

A grinding wheel, mass fraction technology, applied in the direction of manufacturing tools, metal processing equipment, grinding/polishing equipment, etc., can solve the problems of strength loss, affecting the cutting efficiency of grinding wheels, etc., to achieve high flexural strength, improve cutting performance, firing low temperature effect

Inactive Publication Date: 2013-12-25
CHANGSHU JULI GRINDING WHEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The CBN vitrified grinding wheel is mainly composed of a steel base and a working abrasive layer. The main components of the working abrasive layer are vitrified bond and CBN. The firing temperature of traditional CBN vitrified bond is generally 900-950°C, and the flexural strength is generally 75MPa. The strength of CBN loses about 10% under temperature, and the sharp angle of CBN abrasive is passivated, and the sharp angle and strength of CBN will affect the cutting efficiency of the grinding wheel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of preparation method of CBN emery wheel, described CBN emery wheel comprises steel substrate and working abrasive layer, and described working abrasive layer comprises abrasive material layer and intermediate transition layer, and the preparation method of described CBN emery wheel comprises the steps:

[0017] 1) Preparation of pre-melted ceramic powder: Take 15 parts by mass of alumina, 2 parts by mass of sodium oxide, 1 part by mass of magnesium oxide, 3 parts by mass of diboron trioxide, 4 parts by mass of oxidized polyethylene wax, 1 part by mass of calcium oxide, 14 parts by mass Mix parts by mass of aluminum oxide, 3 parts by mass of trioctyl trimellitate, 4 parts by mass of silicon carbide, 16 parts by mass of silicon dioxide, and 3 parts by mass of potassium oxide, then heat-preserve and fire at 1630°C for 3 hours, and then water-cool , crushing, passing through a 240 standard sieve, sieving powder, and drying to obtain pre-melted ceramic powder;

[001...

Embodiment 2

[0022] A kind of preparation method of CBN emery wheel, described CBN emery wheel comprises steel substrate and working abrasive layer, and described working abrasive layer comprises abrasive material layer and intermediate transition layer, and the preparation method of described CBN emery wheel comprises the steps:

[0023] 1) Preparation of pre-melted ceramic powder: Take 18 parts by mass of alumina, 2.5 parts by mass of sodium oxide, 1.5 parts by mass of magnesium oxide, 5 parts by mass of diboron trioxide, 4.5 parts by mass of oxidized polyethylene wax, 1.5 parts by mass of calcium oxide, 18 Parts by mass of aluminum oxide, 3.5 parts by mass of trioctyl trimellitate, 11 parts by mass of silicon carbide, 21 parts by mass of silicon dioxide, and 3.5 parts by mass of potassium oxide are mixed, then fired at 1630°C for 3 hours, and then water-cooled , crushing, passing through a 240 standard sieve, sieving powder, and drying to obtain pre-melted ceramic powder;

[0024] 2) Pr...

Embodiment 3

[0028] A kind of preparation method of CBN emery wheel, described CBN emery wheel comprises steel substrate and working abrasive layer, and described working abrasive layer comprises abrasive material layer and intermediate transition layer, and the preparation method of described CBN emery wheel comprises the steps:

[0029] 1) Preparation of premelted ceramic powder: 26 parts by mass of alumina, 3 parts by mass of sodium oxide, 2 parts by mass of magnesium oxide, 7 parts by mass of boron trioxide, 5 parts by mass of oxidized polyethylene wax, 2 parts by mass of calcium oxide, 26 parts by mass of Parts by mass of aluminum oxide, 4 parts by mass of trioctyl trimellitate, 21 parts by mass of silicon carbide, 28 parts by mass of silicon dioxide, and 4 parts by mass of potassium oxide are mixed, then fired at 1630°C for 3 hours, and then water-cooled , crushing, passing through a 240 standard sieve, sieving powder, and drying to obtain pre-melted ceramic powder;

[0030] 2) Prepa...

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Abstract

The invention discloses a cubic boron nitride (CBN) grinding wheel preparing method. A CBN grinding wheel comprises a steel substrate and a working grinding material layer. The working grinding material layer comprises a grinding material layer and a middle transition layer. The CBN grinding wheel preparing method includes the following steps that (1) premelting ceramic powder is prepared; (2) ceramic bond is prepared; (3) the grinding material layer is prepared by using, by mass, 4-7 parts of ceramic floating bead, 30-32 parts of ceramic bond, 4-6 parts of white corundum and 25-35 parts of CBN; the middle transition layer is prepared by using, by mass, 40-47 parts of 150-mesh ceramic balls and 20-25 parts of ceramic bond; the materials are arranged on the steel substrate according to a general method, sintering is conducted according to a set temperature curve, and a CBN grinding wheel finished product is obtained; in a sintering process, inert gas is adopted for protection. By means of the CBN grinding wheel preparing method, ceramic bond is low in sintering temperature, the CBN grinding wheel is high in breaking strength, and the CBN strength is basically not lost.

Description

technical field [0001] The invention relates to a preparation method of a CBN grinding wheel. Background technique [0002] The CBN vitrified grinding wheel is mainly composed of a steel base and a working abrasive layer. The main components of the working abrasive layer are vitrified bond and CBN. The firing temperature of traditional CBN vitrified bond is generally 900-950°C, and the flexural strength is generally 75MPa. The strength of CBN loses about 10% under temperature, and the sharp angle of CBN abrasive is passivated, and the sharp angle and strength of CBN will affect the cutting efficiency of the grinding wheel. Generally, the stronger the strength of the vitrified bond, the longer the dressing cycle of the grinding wheel and the higher the service life. Contents of the invention [0003] The object of the present invention is to provide a preparation method of a CBN grinding wheel, the firing temperature of the vitrified bond is low, the flexural strength of t...

Claims

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Application Information

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IPC IPC(8): B24D18/00C04B35/10
Inventor 邵国良
Owner CHANGSHU JULI GRINDING WHEEL
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