Abstract
In this investigation, surface grinding experiment has been carried out to evaluate the influence due to jet pressure of grinding fluids on grindability such as residual stress and changed structure in grinding layer, and excess cut, that is concave shape, at the central portion of ground surface is observed. And the residual stress and concave shape are investigated in relation to the grinding temperature, most influential dominating factor of this. A summary of the results are shown below.
(1) As the jet pressure of grinding fluids changes from 0 kg/cm2to 6 kg/cm2, residual stress, the amount of excess cut and grinding temperature are shown about constant value.
(2) As the jet pressure of grinding fluid (the fluids containing sulfurized oil and spermwhale oil) changes from 0 kg/cm2 to 18 kg/cm2, reduction of changing value of residual stress in grinding layer is shown about 50-80%, and then the amount of excess cut could hardly be observed.
(3) It can be seen that change of the grinding temperature, residual stress on grinding surface and the amount of excess cut are in good corresponding relation with the change of jet pressure of grinding fluid.
(4) As the jet pressure of grinding fluid changes from 0 kg/cm2 to 18 kg/cm2, reduction of hardness and depth of the hardness distribution in hardened layer are shown about 20-40 %.
