Mitsubishi Denki K.k.

Toshihiro Nagasaka

Toshio Suzuki

Takeshi Yatomi

A machining solution filtration apparatus for a machining device which includes: a filter, a filter medium which is arranged separately from the filter and supplied continuously; a unit for supplying a contaminated machining solution to the filter medium; a unit for generating a difference in pressure between the upper surface and lower surface of the filter medium; a unit for returning a machining solution filtered via the pressure difference to a filtered solution vessel; a unit for selecting the filter to allow the machining solution to be filtered only thereby for a predetermined period of time; a unit for detecting the presence/absence and/or remaining amount of the filter medium; and a unit for controlling the speed of supplying the filter medium. Accordingly, the apparatus is not only simple in structure and efficient in filtration, but also capable of reducing its running cost by extending the life of the filter and improving utilization of the machining device by reducing the frequency of replacing the filter. It is also easy in maintenance and readily repairable in the event of an abnormality.

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Aichi, Japan

Toshihiro Nagasaka