Abstract: CO2 laser is used to scan the surface of diamond resin-bonded wheel pieces. The 3-dimensional profiles of the surfaces before and after scanning are measured, where the frequency and the duty factor of laser pulse are changed to investigate their effects. It is found that although the power density is kept constant, both the frequency and the duty factor affect the scanning result, and the effect of the former is more significant than that of the latter. On the other hand, scratching tests are planned and carried out to evaluate the scanning effects, where aluminum test pieces are used and the force ratio between tangential force and normal one during scratching is measured as an important index. It is shown that the force ratio can be used to evaluate the dressing effect quantitatively, because it is directly related to the cutting performance of the wheel pieces dressed.

Key words: CO2 laser, Cutting performance, Diamond wheel, Dressing, Scratching test