損耗センサ付き工具を用いた工具寿命検出システム

概要

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In-process tool life detecting system has been developed. To detect tool life during cutting operation, a belt type TIN thin film having good electric conductivity was coated parallel to cutting edges on flank face of a ceramic insert having no electric conductivity. Width of the thin film from the cutting edge was adjusted to the maximum flank wear width which is a criterion of tool life. The electric resistance of the thin film, which is damaged by tool wear, was observed during cutting to detected the tool wear. A coil and a capacitor were connected in series to the sensor insert and made a series resonance circuit, and a sensor head coil with high frequency oscillator was coupled to the coil connected to the tool electromagnetically. An electromagnetic induction between two coils was used to take the signal from the tool with the thin film out to adopt the system in face milting cutter and/or automatic tool changer system in which it could not connect lead wires directly to the tool. The series resonance circuit of the tool was tuned into the frequency of the sensor head coil so that the sensor head coil was influenced by the condition of the circuit of the tool. The system developed in this study showed good stability for electric noises from an environment especially machine tools.
公益社団法人精密工学会の論文
2003-11-05