Zhengzhou Boson Abrasives Co.,Ltd.

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Name: Michael Cui
Tel: +86-371-63683701
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E-mail: grindtec@hotmail.com
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Products > Vitrified Diamond Wheels > > Grinding PCD / PCBN Tools & Inserts
Product name : Grinding PCD / PCBN Tools & Inserts
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Vitrified Diamond Grinding Wheels for PCD / PCBN Tools and Inserts Grinding

Tools made of PCD or PCBN have highest quality demands. Accurate geometries, smooth surfaces, and very little chipping. BOSON has developed vitrified bond diamond grinding wheels for the economic production of high quality cutting edges. These provide the required cutting edge quality with high stock removal rates, wheel life and are easy to dress.

 Superior Edge Quality

 Increased Production Rates

 Guaranteed Consistency

 Custom Engineered Products Available

Diamond grinding wheels are a group of composite materials that are composed of diamond grits and a bond matrix. The familiar bonding materials include metal, resin and vitrified. The strength of resin bond is lower than that of metal or vitrified bond, which, accordingly, yields a shorter wheel life. Resin bond diamond wheels are fabricated by hot pressing, which yields a bonding matrix without large pore, causing deterioration in chip removal and heat dissipation. Moreover, due to its low grinding ratio, resin bond grinding wheels need constant truing and dressing in the whole grinding process, in order to maintain the accurate shape. Metal bond diamond grinding wheels have higher bonding strength between the diamond grits and the bonding matrix than that of resin bond wheels, and, consequently, longer tool life. The metal bonding matrix is usually composed of bronze, and the diamond bronze composite is formed by hot pressing. Therefore, a structure with intentionally introduced pores can hardly be attained, which, along with the high ductility of the metal matrix, retards the exposure of new cutting edges when the diamond grits become dull during grinding process. Severe friction between the metal bond and the workpiece is thus induced, which accordingly raises the workpiece temperature and reduces the grinding efficiency. On the other hand, vitrified bond diamond grinding wheels also have higher bonds strength than resin bond ones. Nevertheless, the high elastic modulus and low fracture toughness of the glass bonding materials facilitate a self-dressing capability of wheels, which can be further enhanced when large pores are intentionally introduced into the wheels. As vitrified bond diamond wheels can be densified by pressureless sintering at low temperatures, pores of different sizes can be introduced into the wheel structure. Such a structure possibly can reduce the frictional heat generated during grinding, by reducing the contact area and by the flowing of colling fluid in the pores. Accordingly, controlling the percentage and scale of the intentionally introduced pores in vitrified bond grinding wheels can yiedl proper combination of bond strength, chip removal ability, and colling performance in precision grinding process.

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