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Preparing method of ceramic bonding agent CBN (Cubic Boron Nitride) grinding wheel with precisely adjustable and controllable hardness attenuation value

A vitrified bond and bond technology, applied in manufacturing tools, metal processing equipment, grinding/polishing equipment, etc., can solve problems such as affecting the performance of grinding wheels, limiting the application range of CBN grinding wheels, and different sintering temperatures

Inactive Publication Date: 2014-08-27
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the current preparation process of ceramic CBN grinding wheel, once the grinding wheel is sintered, the hardness of the grinding wheel is a constant value and cannot be changed
However, in the industrial production of ceramic CBN grinding wheels, even if it is the same batch of grinding wheels, each grinding wheel is placed in a different position in the kiln, which will cause a difference in the actual sintering temperature, which will cause fluctuations in the hardness of the grinding wheel and affect the performance of the grinding wheel
On the other hand, different grinding materials need to prepare ceramic CBN grinding wheels with different formulations for grinding, which greatly limits the application range of CBN grinding wheels

Method used

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  • Preparing method of ceramic bonding agent CBN (Cubic Boron Nitride) grinding wheel with precisely adjustable and controllable hardness attenuation value
  • Preparing method of ceramic bonding agent CBN (Cubic Boron Nitride) grinding wheel with precisely adjustable and controllable hardness attenuation value
  • Preparing method of ceramic bonding agent CBN (Cubic Boron Nitride) grinding wheel with precisely adjustable and controllable hardness attenuation value

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a vitrified bond CBN grinding wheel that can precisely regulate the hardness attenuation value proposed by the present invention comprises the following steps:

[0022] S1. Binder raw material pretreatment: pour 16% boric acid, 9% sodium carbonate, 5% potassium carbonate, 8% alumina, 4% titanium dioxide, and 58% silicon dioxide into the first ball mill altar by weight percentage, press the ball After corundum ball milling balls are added at a material mass ratio of 1.2:1, ball milling is performed for 30 minutes to obtain binder pretreatment raw materials, wherein the rotation speed of the first ball mill altar is 30r / min, the diameter of the first ball mill altar is 400mm, and the corundum ball mill with a diameter of 50mm Balls account for 30%, and corundum balls with a diameter of less than 50mm account for 70%;

[0023] S2. Melting binder: Heat the crucible furnace to 1350°C at a heating rate of 3°C / min, pour in the raw material for binder pre...

Embodiment 2

[0032] A method for preparing a vitrified bond CBN grinding wheel that can precisely regulate the hardness attenuation value proposed by the present invention comprises the following steps:

[0033] S1. Pretreatment of binder raw materials: pour 20% boric acid, 9% sodium carbonate, 5% potassium carbonate, 8% alumina, 4% titanium dioxide, and 54% silicon dioxide into the first ball mill altar by weight percentage, press the ball After corundum ball milling balls are added at a material mass ratio of 1.2:1, ball milling is performed for 30 minutes to obtain binder pretreatment raw materials. The rotation speed of the first ball milling altar is 30r / min, the diameter of the first ball milling altar is 400mm, and corundum ball milling balls with a diameter of 50mm Accounted for 30%, corundum balls with a diameter less than 50mm accounted for 70%;

[0034] S2. Melting binder: Heat the crucible furnace to 1350°C at a heating rate of 5°C / min, pour in the raw material for binder pretr...

Embodiment 3

[0043] A method for preparing a vitrified bond CBN grinding wheel that can precisely regulate the hardness attenuation value proposed by the present invention comprises the following steps:

[0044] S1. Binder raw material pretreatment: pour 18% boric acid, 9% sodium carbonate, 5% potassium carbonate, 8% alumina, 4% titanium dioxide, and 56% silicon dioxide into the first ball mill altar by weight percentage, press the ball After corundum ball milling balls are added at a material mass ratio of 1.2:1, ball milling is performed for 30 minutes to obtain binder pretreatment raw materials. The rotation speed of the first ball mill altar is 30 r / min, and the diameter of the first ball mill altar is 400 mm. Balls account for 30%, and corundum balls with a diameter of less than 50mm account for 70%;

[0045] S2. Smelting binder: Heat the crucible furnace to 1350°C at a heating rate of 4°C / min, pour in the raw material for binder pretreatment, and after the furnace temperature rises t...

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Abstract

The invention discloses a preparing method of a ceramic bonding agent CBN (Cubic Boron Nitride) grinding wheel with a precisely adjustable and controllable hardness attenuation value. The preparing method comprises the following steps that: 16 to 20 weight percent of boric acid, 9 weight percent of sodium carbonate, 5 weight percent of potassium carbonate, 8 weight percent of aluminum oxide, 4 weight percent of titanium dioxide, and 54 to 58 weight percent of silicon dioxide are pretreated; bonding agents are prepared through smelting; the bonding agents are crushed; the bonding agents are subjected to ball milling; 15 to 23 weight percent of bonding agent powder, 72 to 80 weight percent of CBN grinding materials, 3 weight percent of yellow dextrin powder and 2 weight percent of deionized water are poured into a grinding jar, ball milling is carried out, and grinding wheel forming materials are prepared; a grinding wheel is formed after pressurizing and drying; the grinding wheel is sintered; a buffer solution is prepared; and the buffer solution is utilized for adjusting and controlling the hardness of the grinding wheel, and the ceramic bonding agent CBN grinding wheel with the precisely adjustable and controllable hardness attenuation value is prepared. The preparing method has the advantages that the hardness of the prepared ceramic CBN grinding wheel is precise and controllable, the ceramic CBN grinding wheels which have different hardness and are suitable for being used for grinding different materials are obtained, and the grinding performance of the ceramic CBN grinding wheel is improved.

Description

technical field [0001] The invention relates to the technical field of grinding wheel preparation, in particular to a method for preparing a vitrified bond CBN grinding wheel that can precisely control the hardness attenuation value. Background technique [0002] Vitrified bond cubic boron nitride (CBN) grinding wheel has large elastic modulus, good shape retention, high grinding precision, good self-sharpening performance, small grinding force, and less heat generated during grinding, which can reduce or avoid It is recognized as the best tool for precision grinding of ferrous metals due to burns and micro-cracks on the surface of the machined parts, prolonging the service life of the machined parts and increasing the reliability. At present, the preparation process of vitrified bond CBN grinding wheel is the same as the traditional ceramic preparation process: the vitrified bond and CBN are mixed evenly according to the formula, dry pressed, and the green body is sintered ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/14B24D18/00C04B30/00
Inventor 刘小磐万隆
Owner HUNAN UNIV
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