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Preparation technology of high-speed grinding CBN (Cubic Boron Nitride) ceramic grinding wheel

A ceramic grinding wheel and grinding technology, which is applied in the direction of grinding/polishing equipment, grinding devices, abrasives, etc., can solve the problems affecting the cutting efficiency of the grinding wheel, and achieve the effect of improving the wrapping ability, improving the cutting efficiency, and maintaining the strength

Active Publication Date: 2011-04-13
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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  • Preparation technology of high-speed grinding CBN (Cubic Boron Nitride) ceramic grinding wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Preparation of binder

[0025] 1. Pre-melted ceramic powder

[0026] a. Mixing of raw materials: Mix the raw materials according to the following ratio of parts (volume ratio), feldspar 50, boron glass 40, K 2 CO 3 7. Na 2 CO 3 3;

[0027] b. High temperature firing: 1600 degrees (Celsius);

[0028] c. Water cooled to room temperature;

[0029] d. Broken and passed through 240 standard sieves;

[0030] e. The powder under the sieve is dried, and the obtained powder is pre-melted ceramic powder.

[0031] 2. Binder mixing

[0032] Nanoscale SiO 2 Powder, nano-mullite powder, and pre-melted ceramic powder are mixed evenly by ball milling at a mass ratio of 2:3:5, and the resulting product is a binder

[0033] 2. Preparation of ceramic abrasive layer

[0034] a. Weigh the abrasive layer according to the following proportions (volume ratio): 35% of bonding agent, 8% of white corundum, 7% of aluminum oxide hollow ball, and 50% of CBN;

[0035] b. Take the int...

Embodiment 2

[0040] 1. Preparation of binder

[0041] 1. Pre-melted ceramic powder

[0042] a. Mixing of raw materials: Mix the raw materials according to the following ratios (volume ratio), feldspar 30, boron glass 60, K 2 CO 3 3. Na 2 CO 3 7;

[0043] b. High temperature firing: 1600 degrees (Celsius);

[0044] c. Water cooled to room temperature;

[0045] d. Broken and passed through 240 standard sieves;

[0046] e. The powder under the sieve is dried, and the obtained powder is pre-melted ceramic powder.

[0047] 2. Binder mixing

[0048] Nanoscale SiO 2 Powder, nano-mullite powder, and pre-melted ceramic powder are mixed evenly by ball milling at a mass ratio of 2:3:5, and the resulting product is a binder

[0049] 2. Preparation of ceramic abrasive layer

[0050] a. Weigh the abrasive layer according to the following proportions (volume ratio): 35% of bonding agent, 8% of white corundum, 7% of aluminum oxide hollow ball, and 50% of CBN;

[0051] b. Take the intermediat...

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Abstract

The invention discloses a preparation technology of a high-speed grinding CBN (Cubic Boron Nitride) ceramic grinding wheel, which comprises the steps of: mixing raw materials according to the following part proportion: 30 to 50 parts of feldspar, 40 to 60 parts of boron glass, 3 to 7 parts of K2CO3 and 3 to 7 parts of Na2CO3; firing at high temperature; ball-milling and uniformly mixing nano SiO2 powder, nano mullite powder and pre-melting ceramic powder according to the mass rate of 2:3:5 to obtain a bonding agent; preparing an abrasive layer from 35% of the bonding agent, 8% of white corundum, 7% of alumina hollow ball and 50% of CBN; preparing a transition layer from 35% of the bonding agent and 65% of ceramic balls of 150 meshes; uniformly mixing the weighed materials; adding the materials to a polythene water solution; pressing to form a fixed shape; drying; and sintering in a high-temperature furnace. The preparation technology has the advantages of low firing temperature of the bonding agent, high breaking strength and good bonding performance to abrasives, enhances the wettability of the bonding agent to the abrasives, enhances the cutting efficiency of abrasive particles, reduces the cost, and enhances the enwrapping capability, strength and sintering temperature of the bonding agent to the abrasive, and in addition, CBN strength is not changed and no burning loss is generated on a surface.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a preparation technology of a grinding wheel, more specifically to a preparation technology of a high-speed grinding CBN ceramic grinding wheel. 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 crankshaft connecting rod neck processing directly affects the energy-saving effect of the engine. At present, there is no molding technology in this area in China, and it is urgent to develop a method for CBN ceramic high-speed grinding wheel preparation technology for high...

Claims

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Application Information

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IPC IPC(8): B24D18/00B24D3/14
Inventor 郑永阁王昆吕升东李延海王铁刚
Owner 沈阳中科超硬磨具磨削研究所
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