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State monitoring device of cutting fluid using odor sensor

  • US 10,101,314 B2
  • Filed: 10/12/2015
  • Issued: 10/16/2018
  • Est. Priority Date: 10/17/2014
  • Status: Active Grant
First Claim
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1. A state monitoring device of a cutting fluid of a machine tool, the machine tool including a cutting-fluid supplying mechanism circulating and repeatedly supplying the cutting fluid to a region where a workpiece is subjected to cutting, the state monitoring device comprising:

  • an odor sensor configured to measure and output odor intensity of the cutting fluid;

    a fluid-quality deterioration determination unit configured to compare a measured odor intensity value measured and output by the odor sensor with a threshold value set in advance in order to determine fluid-quality deterioration of the cutting fluid caused by impurities mixed in the cutting fluid or corrosion of the cutting fluid;

    a cutting-fluid deterioration handling unit configured to carry out a cutting-fluid deterioration handling process in response to a determination result of the fluid-quality deterioration determination unit indicating that the measured odor intensity value is equal to or greater than the threshold value; and

    a cover surrounding the odor sensor and having an opening inside a cutting-fluid tank in which the cutting fluid to be monitored is stored,wherein the cover is configured to cover a part of a surface of the cutting fluid stored in the cutting-fluid tank, andwherein the odor sensor is arranged in a space defined by the cover and the part of the surface of the cutting fluid to measure the odor intensity of an odor of the cutting fluid in said space.

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