Wire Electrical Discharge Truing of Metal Bond Diamond Grinding Wheels

McSpadden, SB

Oak Ridge National Laboratory

关键词: Silicon Nitrides;    36 Materials Science;    Grinding;    Accuracy;    Diamonds;   

DOI  :  10.2172/814600
RP-ID  :  ORNL/TM-2001/220
RP-ID  :  AC05-00OR22725
RP-ID  :  814600

美国|英语

来源: UNT Digital Library

【 摘 要 】

Cylindrical wire EDM profile truing of the metal bond diamond wheel for precision form grinding of ceramics is presented in this report. First a corrosion-resistant, precise spindle with the high-electrical current capability for wire EDM truing of grinding wheel was fabricated. An arc profile was adopted in order to determine form tolerances capabilities of this process. Results show the wire EDM process can generate {micro}m-scale precision form on the diamond wheel efficiently. The wheel, after truing, was used to grind silicon nitride. Grinding forces, surface finish of ground components, and wheel wear were measured. The EDM trued wheel showed a reduction in grinding force from that of the stick dressed wheel. Surface finishes between the two truing methods were similar. In the beginning of the grinding, significant wheel wear rate was identified. The subsequent wheel wear rate stabilized and became considerably lower.