STATE MONITORING DEVICE OF CUTTING FLUID USING ODOR SENSOR

• US 20160109426A1
• Filed: 10/12/2015
• Published: 04/21/2016
• Est. Priority Date: 10/17/2014
• Status: Active Grant

• Current Assignee: Fanuc Corporation
• Original Assignee: Fanuc Corporation
• Inventors: ENDOU, Takahiro
• Granted Patent: US 10,101,314 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01N 33/2888 Lubricating oil characteristics, e.g. deterioration lubricating properties G01N33/30

Abstract

When machining a workpiece by a machine tool by cutting, a cutting fluid is sprayed to a workpiece machining region. Above a surface of the cutting fluid in a cutting fluid tank, an odor sensor for detecting the odor emitted by the cutting fluid is disposed in the space defined the surface of the cutting fluid in the cutting fluid tank and a cover. Based on the odor detected by the odor sensor, deterioration of the cutting fluid is determined.

Claims

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 of the cutting fluid comprising:

an odor sensor that detects a type of odor of the cutting fluid; and

a cutting-fluid deterioration handling unit that carries out a cutting-fluid deterioration handling process when an odor detection signal is output from the odor sensor.

2. 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 of the cutting fluid comprising:

an odor sensor that measures and outputs odor intensity of the cutting fluid;

a fluid-quality deterioration determination unit that compares a measured value measured by the odor sensor with a threshold value set in advance in order to determines fluid-quality deterioration of the cutting fluid; and

a cutting-fluid deterioration handling unit that carries out a cutting-fluid deterioration handling process based on a determination result of the fluid-quality deterioration determination unit.

3. The state monitoring device of the cutting fluid of the machine tool according to claim 2, wherein

the fluid-quality deterioration determination unit has a threshold-value setting unit that calculates and sets the threshold value based on the measured value measured by the odor sensor for a first time after replacement of the cutting fluid and a threshold-value calculating coefficient set in advance, and wherein

the fluid-quality deterioration determination unit is configured to compare the measured value measured by the odor sensor with the threshold value calculated and set by the threshold-value setting unit and determine the fluid-quality deterioration of the cutting fluid.

4. The state monitoring device of the cutting fluid of the machine tool according to claim 1, wherein

the odor sensor is surrounded by a cover so as to arrange the odor sensor in a space defined by the cover and a surface of the cutting fluid in a cutting-fluid tank in which the cutting fluid is stored.