Wire electric discharge machine having estimation function for filter replacement timing
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United States of America Patent
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Jan 15, 2019
Grant Date -
Apr 7, 2016
app pub date -
Oct 5, 2015
filing date -
Oct 6, 2014
priority date (Note) -
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Abstract
A wire electric discharge machine has a function of estimating the time for replacement of a filter based on a use situation for the machine. A time Tr during which the filter is serviceable is calculated according to an equation, Tr=|(Pd−Pn)/ΔP|, based on a fluid pressure variation amount ΔP, a current filter fluid pressure Pn, and a filter life pressure. A remaining available time Td for the filter which takes into account the operation rate of the machine is calculated according to an equation, Td=Tr/W.
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