Technology for producing CBN (Cubic Boron Nitride) high-speed ceramics grinding wheel

A ceramic and grinding wheel technology, which is applied in the manufacture of tools, metal processing equipment, grinding/polishing equipment, etc., can solve problems affecting the cutting efficiency of grinding wheels, and achieve the effects of improving wrapping capacity, reducing costs, and high flexural strength

Active Publication Date: 2012-07-04
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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  • Technology for producing CBN (Cubic Boron Nitride) high-speed ceramics 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 parts ratio (volume ratio), boric anhydride 20, lepidolite 35, albite feldspar 40, Na 2 CO 3 5;

[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 AL 2 o 3 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. T...

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 parts ratio (volume ratio), boric anhydride 15, lepidolite 45, albite 30, Na 2 CO 3 10;

[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 AL 2 o 3 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 ...

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Abstract

The invention discloses a technology for producing a CBN (Cubic Boron Nitride) high-speed ceramics grinding wheel, comprising the following steps of: mixing following raw materials in part by weight: 15 to 20 parts of boron anhydrous, 35 to 45 parts of lepidolite, 30 to 40 parts of albite and 5 to 10 parts of Na2CO3; firing at a high temperature; carrying out the ball milling and uniform mixing on nanometer AL2O3 powder, nanometer mullite powder, pre-melted ceramics powder according to the mass ratio of 2:3:5 to obtain the product of binding agent, wherein a grinding material layer comprises 35% of binding agent, 8% of white corundum, 7% of alumina hollow ball and 50% of CNB, an intermediate layer comprises 35% of binding agent and 65% of ceramics balls of 150 meshes; after equably mixing the materials, adding a polyethylene water solution; pressing into a fixed shape; and firing in a high temperature furnace after drying. The technology for preparing the CBN high speed ceramics grinding wheel has the advantages that the binding agent has low firing temperature and strong rupture strength and can bind the grinding material well and wet the grinding material better, the cutting efficiency of abrasive particles is improved, the cutting cost of abrasive particles is reduced, the packaging capacity of the binding agent to the grinding material, the intensity and the sintering temperature are increased, the CNB intensity is not changed and the surface of the CNB is not burnt.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a preparation method of a grinding wheel, more specifically to a preparation method of a CBN ceramic high-speed 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 camshaft and crankshaft processing 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 develop a camshaft for automobiles. Peach high-speed grinding CBN ceramic high-speed grinding wheel preparation tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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