초록 ▼

Net power consumed by one or more tools, continuously or intermittently is totalized and compared with a predetermined energy limit characterizing the life expectancy of a tool for optimum and safe use on a machine tool. Digital and computer techniques are used in order to keep track of the usage of

Net power consumed by one or more tools, continuously or intermittently is totalized and compared with a predetermined energy limit characterizing the life expectancy of a tool for optimum and safe use on a machine tool. Digital and computer techniques are used in order to keep track of the usage of the various tools within their respective life expectancies.

대표청구항 ▼

A system for monitoring tool life on a machine tool having at least one operative tool thereon, comprising: means for instantaneously and recurrently deriving a measuring signal characteristic of power consumed by said machine tool for the purpose of relative motion between said workpiece and said t

A system for monitoring tool life on a machine tool having at least one operative tool thereon, comprising: means for instantaneously and recurrently deriving a measuring signal characteristic of power consumed by said machine tool for the purpose of relative motion between said workpiece and said tool; said measuring signal deriving means being operable in one of an idle position mode and a working position mode of said tool relative to said workpiece; means for combining an idle position measuring signal and a working position measuring signal for deriving a signal indicative of net power consumed by said tool; means for integrating said indicative signal as a function of time for obtaining a past history characteristic signal; means responsive to said integrating means for comparing said characteristic signal with a reference signal representative of the life expectancy of said tool.