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Ceramic bond CBN (Cubic Boron Nitride) abrasive wheel for double end surface grinding

A vitrified bond and cubic boron nitride technology, which is applied in the field of grinding tools, can solve the problems of unacceptable economy and high price of imported grinding wheels, and achieve long service life, low comprehensive grinding cost, and huge economic and social benefits Effect

Inactive Publication Date: 2012-12-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are similar products with better performance in foreign countries, such as the end face grinding wheels produced by France Saint-Gobain Group and Japan Mitsui Company, but the price of imported grinding wheels is expensive and unacceptable economically

Method used

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  • Ceramic bond CBN (Cubic Boron Nitride) abrasive wheel for double end surface grinding
  • Ceramic bond CBN (Cubic Boron Nitride) abrasive wheel for double end surface grinding
  • Ceramic bond CBN (Cubic Boron Nitride) abrasive wheel for double end surface grinding

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with specific embodiments.

[0024] The present invention adopts conventional industrial raw materials and conventional preparation methods, and first prepares vitrified bonding agent.

[0025] Compared with ordinary silicon carbide and corundum abrasives, cubic boron nitride can be oxidized at a lower temperature (below 1000°C), destroying the superhard abrasive properties of cubic boron nitride, so the vitrified bond grinding wheel is different from ordinary ceramics. Compared with the bonded grinding wheel, low temperature sintering is required, that is, the refractoriness of the vitrified bond itself is lower. In addition, the double-end grinding contact surface is wide, and the heat generated during the grinding process is large, which not only makes the grinding wheel easy to wear, but also makes the workpiece prone to local burns or darkening, which affects the machining accuracy and quality of ...

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Abstract

The invention discloses a ceramic bond CBN (Cubic Boron Nitride) abrasive wheel for double end surface grinding, which consists of a matrix, a grinding wheel block and a bonding layer, wherein the grinding wheel block consists of the following raw material components according to mass percent: 30-80% of CBN abrasives, 0-35% of white sapphire, 15-30% of ceramic bond, 5% of bonding wetting agent and 0-12% of pore creating material; the ceramic bond consists of the following raw material components according to mass percent: 45-55% of SiO2, 9-12% of Al3O3, 15-20% of B2O3, 4-8% of Na2O, 4-8% of K2O, 4-12% of MgO and 0-10% of Na3AlF6; the sintering temperature of the ceramic bond is lower than 900 DEG C; and the pore creating material is of polymetylmethacrylate (PMMA) microspheres. The invention provides an end surface grinding wheel which is capable of efficiently machining flat and flaky high-speed steel, alloy steel and cast iron parts and has the characteristics of high machining precision of workpieces, good air hole adjustability, high grinding efficiency, long service life and low comprehensive grinding cost of the workpieces.

Description

technical field [0001] The invention relates to grinding tools, in particular to a vitrified bond cubic boron nitride (CBN) end face grinding wheel for end face grinding of flat or sheet metal workpieces. Background technique [0002] With the rapid development of science and technology and industry, modern machinery industry products have higher and higher requirements for the performance of accessories, and the workpieces produced in large quantities require good interchangeability, so the requirements for grinding precision and grinding efficiency are increasing. high. Flat or sheet metal workpieces are an indispensable type of precision parts in the machinery industry. They are widely used in air-conditioning, automobiles, hydraulic pressure, bearings, magnetic materials and other industries, such as air-conditioning compressor rollers, cylinders, slides, and automobile pistons. Rings, brake pads, vane pump blades and other workpieces are generally made of high-speed st...

Claims

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Application Information

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IPC IPC(8): B24D3/14B24D7/00
Inventor 李志宏吕杏芬朱玉梅赵光涛
Owner TIANJIN UNIV
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