Investigation on the Preparation of Vitrified Bond CBN Grinding Tools

Abstract

The preparation principles of vitrified bond cubic boron nitride (CBN) grinding tools were discussed in this paper in terms of composite material principles and grinding theory. Vitrified bond CBN grinding tools were prepared by using CBN abrasives made in China. The results showed that CBN abrasives made in China could meet the needs of preparation of vitrified bond CBN grinding tools, but suitable sintering temperature of such tools should be lower than 800°C. Matching in thermal expansion coefficients between CBN abrasives and vitrified bond had obvious effect on the strength of the tools. Within the sintering temperature range, relatively higher sintering temperature was beneficial to the strength of bond bridge and the holding strength between vitrified bond and CBN abrasive particles. The grinding experimental results showed that the wheel properties of CBN grinding wheels made by authors were good and preparation parameters were suitable.

Development of Vitrified Bond CBN Wheel for Internal Precision Grinding of the Air-Conditioner Compressor Piston Hole

“…Matching in thermal expansion coefficients between CBN abrasives and vitrified bond has obvious effect on the strength of the tools. Within the sintering temperature range (1000-800℃), relatively higher sintering temperature is beneficial to the bonding and holding strength [6]. In the experiment, wide range of matched materials were pre-sintered and crushed into powder to test mechanical properties.…”

Preparation of Microcrystalline CBN Abrasive

“…Cubic boron nitride (CBN) is the second hardest materials used in industrial production, exceeded only by diamond. It has high hardness, high chemical inertness, better thermal properties and other advantages [1][2][3]. Because of those superior characteristics, CBN grinding wheels have been widely used in various types of grinding operations, ranging from high-efficiency grinding to high-precision grinding [4][5][6].…”

Sintering of Vitrified Bond CBN Grinding Tool

“…chosen for the preparation experiments of CBN grinding tools. The vitrified bond was qualified for the preparation requirement in strength, thermal compatibility and sintering temperature range, etc [11]…”