| Popis: |
In this study, the purification method of coolant by the micro-bubble dissolution is proposed. The micro-bubble dissolving device with the simple configuration is incorporated within the coolant supply system of an external grinding machine, and then, the effect of the purification method is examined experimentally on the ground surface roughness. From the results, the following are clarified: The dissolved micro-bubbles can rise up grinding debris by electrical adsorption, and then, the debris is concentrated on the coolant surface in the coolant tank. By this effect, the grinding debris, especially the grain fragments of the grinding-wheel, can be removed from the coolant. The coolant purification by the enough dissolved micro-bubbles reduces the density of grinding debris down to a fourth of the initial condition. This purification effect improves the ground surface roughness. The longer the dissolving duration is, the more the ground surface roughness is improved. Eventually, the improvement of the surface roughness reaches down to a half of that without the micro-bubble dissolution. |
