Comparing performance of CBN grinding wheels in high-speed grinding particulate reinforced titanium matrix composites

To take advantages of high-speed grinding to improve the high-efficiency precision machining of particulate reinforced titanium matrix composites (PTMCs), it is necessary to further understand the grinding performance of high-speed grinding PTMCs with CBN grinding wheels. High-speed grinding PTMCs was carried out with three kinds of CBN grinding wheels, and the grinding forces, the temperature, the ground surface roughness and the ground surface topography were comparatively investigated. The results display that grinding force, temperature and ground surface roughness obtained with the brazed grinding wheel are the best, compared with those of vitrified or electroplated grinding wheels. Its grinding force and temperature are 16.2%-40.4% (normal), 25.2-44.4% (tangential) and 26.0%-74.3% lower than those of vitrified wheels, and 7.1%-31.1% (normal), 23.3-31.1% (tangential) and 14.5%-58.9% lower than those of electroplated wheels. The roughness of surface ground by brazed wheel is 0.60-0.77 μm. Therefore, the brazed grinding wheel has more advantages in high-speed grinding of PTMCs.