Dielectric working fluid processor and control method of dielectric working fluid processor
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United States of America Patent
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Aug 11, 2020
Grant Date -
Mar 21, 2019
app pub date -
Sep 17, 2018
filing date -
Sep 20, 2017
priority date (Note) -
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Abstract
A dielectric working fluid processor for processing dielectric working fluid used in a wire electrical discharge machine includes: a dirty liquid tank for storing dielectric working fluid containing machining swarf; a filter for removing machining swarf from the dielectric working fluid in the dirty liquid tank; a clean liquid tank for storing the dielectric working fluid from which the machining swarf has been removed by the filter; a pump for supplying dielectric working fluid from the dirty liquid tank to the filter; an inverter for controlling electric power to be supplied to the pump; a pump controller for controlling the rotation speed of the pump by varying the frequency of electric power supplied from the inverter to the pump; and a feed pressure obtainer for obtaining the feed pressure of the dielectric working fluid supplied from the pump to the filter, based on the frequency of the electric power.
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