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. 2023 Jun 21;23(13):5794.
doi: 10.3390/s23135794.

Standalone Sensors System for Real-Time Monitoring of Cutting Emulsion Properties with Adaptive Integration in Machine Tool Operation

Jozef Peterka  1 , Frantisek Jurina  1 , Marek Vozar  1 , Boris Patoprsty  1 , Tomas Vopat  1 , Vladimir Simna  1 , Pavol Bozek  1
Affiliations

Standalone Sensors System for Real-Time Monitoring of Cutting Emulsion Properties with Adaptive Integration in Machine Tool Operation

Jozef Peterka et al. Sensors (Basel). .

Abstract

This paper presents a novel cutting fluid monitoring sensor system and a description of an algorithm framework to monitor the state of the cutting emulsion in the machine tool sump. One of the most frequently used coolants in metal machining is cutting emulsion. Contamination and gradual degradation of the fluid is a common occurrence, and unless certain maintenance steps are undertaken, the fluid needs to be completely replaced, which is both un-economical and non-ecological. Increasing the effective service life of the cutting emulsion is therefore desired, which can be achieved by monitoring the parameters of the fluid and taking corrective measures to ensure the correct levels of selected parameters. For this purpose, a multi-sensor monitoring probe was developed and a prototype device was subsequently created by additive manufacturing. The sensor-carrying probe was then placed in the machine tool sump and tested in operation. The probe automatically takes measurements of the selected cutting emulsion properties (temperature, concentration, pH, level height) in set intervals and logs them in the system. During the trial run of the probe, sensor accuracy was tracked and compared to reference measurements, achieving sufficiently low deviations for the purpose of continuous operation.

Keywords: concentration measurement; cutting fluids; probe.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Basic scheme of probe placement.
Figure 2
Figure 2
Location of probe’s sensors.
Figure 3
Figure 3
Scheme of the concentration measurement sensor.
Figure 4
Figure 4
Oscilloscope readings for 1% and 100% cutting fluid concentrations.
Figure 5
Figure 5
Values of concentration measurement.
Figure 6
Figure 6
Values of sump fill measurement.
Figure 7
Figure 7
Values of temperature measurement.
Figure 8
Figure 8
Values of pH measurement. Note: A dashed line means that reference measurements were not performed.
See this image and copyright information in PMC

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