Journal of Environmental Conservation Engineering

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Reducing the use of machining fluid such as cutting oil and grinding fluid, which cause heavy environmental load in waste fluid treatment, is desired in industrial plant processing. In this investigation, new grinding methods such as the blow grinding method using compressed air, the mist / no mist grinding method using small quantities of water, and the half underwater grinding method, all of which greatly decrease the amount of the grinding fluid supply, are proposed as a substitution of the wet grinding method, which uses a large quantity of conventional grinding fluid in cylindrical grinding. Cooling ability and lubricity as grinding performance of these methods were evaluated. The blow grinding method obtained neither effective lubricity nor the cooling effect with an air supply rate of approximately 90L/min. In the mist grinding method, partial cooling ability was confirmed, and the lubricity was confirmed while plunge speed is small. On the other hand, the half underwater grinding method achieved lubricity equal to the wet grinding method by combining a small amount of fluid supply. In addition, it is estimated that cooling ability of the half underwater method is equal to that of the wet grinding method considering a fluid supply rate of 2.04L/min. In conclusion, because of the large cooling ability for workpieces, it is expected that the half underwater grinding method can be applied to highly exothermic machining.

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