Thermal aspects of grinding with superabrasives Part 2

Abrasive particle and wheel surface temperatures have been measured during the single point and full wheel grinding of ceramics and hardened steels using a multi-wavelength infrared sensor. The analytically estimated grinding temperatures are found to be consistent with the measured grinding temperatures. In particular, the measurements show that CBN and diamond abrasives grind at a lower temperature than Al₂O₃ abrasives. Calculations made using the model show that work surface and abrasive temperatures in grinding are nearly an order of magnitude greater than in polishing, and that therefore there is a greater tendency for thermally induced damage to occur in grinding than in polishing or honing. Furthermore, residual stresses and metallurgical changes produced in hardened steel surfaces by grinding are found to correlate well with the effective work surface temperature.