Fabrication of cBN·frit/Al₂O₃·frit Grinding Wheel by Bonding

Abstract

Research and development of grinding wheel bonded cBN·frfrit/Al₂O₃·frit (laped sintering) to outer surface of metal ring were conducted. Ag-Cu-Ti brazing was applied for bonding method in stead of conventional adhesive agent method.
Main results obtAlned are as follows.
(1) The relief of residual thermal stress and operating stress at joint are important. It was concluded by calculation of stress that use of Kovar for metal ring was effective for thermal stress relief at bonding and slit cutting to Kovar ring was effective for operating stress relief at rotating.
(2) New grinding wheel fabricated with the above mentioned procedure rotated by peripheral speed 290 m/s at spin test. From this spin test result, it was confirmed that this wheel had excellent rotating characteristic compared with conventional wheel (adhesive agent method).