JP-2026075325-A - Cutting fluid detection system, cutting fluid supply device, and cutting fluid detection method

JP2026075325AJP 2026075325 AJP2026075325 AJP 2026075325AJP-2026075325-A

Abstract

【assignment】 This invention provides a cutting fluid detection system that can accurately detect the quality of cutting fluid with minimal effort. [Solution] A cutting fluid detection system for detecting the quality of a cutting fluid C containing water and a water-soluble cutting fluid is provided, comprising: a heating unit 10 for locally heating the cutting fluid C while immersed in the cutting fluid C; a temperature measuring unit 20 for measuring the temperature of the cutting fluid C near the heating unit 10; a temperature measurement data acquisition means 32 for acquiring temperature measurement data from the temperature measuring unit 20, which includes at least post-heating temperature data indicating the temperature of the cutting fluid C after heating by the heating unit 10 has started; and a quality detection means 33 for detecting the quality of the cutting fluid C based on the temperature measurement data acquired by the temperature measurement data acquisition means 32. [Selection Diagram] Figure 2

Inventors

幅田圭吾
柳清隆
佐藤政春
山岸喜代志

Assignees

株式会社サンエー

Dates

Publication Date: 20260508
Application Date: 20241022

Claims (8)

A cutting fluid detection system for detecting the quality of a cutting fluid containing water and a water-soluble cutting fluid, A heating unit for locally heating the cutting fluid while immersed in it, A temperature measuring unit for measuring the temperature of the cutting fluid near the heating section, A means for acquiring temperature measurement data from a temperature measurement unit, which includes at least post-heating temperature data indicating the temperature of the cutting fluid after heating by the heating unit has started, A cutting fluid detection system comprising a temperature data acquisition means and a quality detection means for detecting the quality of the cutting fluid based on temperature data acquired by the temperature data acquisition means.
The cutting fluid detection system according to claim 1, wherein the aforementioned quality is the concentration of a water-soluble cutting fluid in the cutting fluid.
The cutting fluid detection system according to claim 1, wherein the aforementioned quality is the degree of deterioration of the cutting fluid.
The quality detection means, A first quality detection means for detecting the first quality of the cutting fluid, A cutting fluid detection system according to claim 1, comprising a second quality detection means for detecting a second quality cutting fluid that is different from the first quality.
The cutting fluid detection system according to claim 4, wherein the first quality detection means and the second quality detection means detect the first quality and the second quality respectively based on the same temperature measurement data.
The primary quality is the concentration of water-soluble cutting fluid in the cutting fluid. The cutting fluid sensor according to claim 4, wherein the second quality is the degree of deterioration of the cutting fluid.
A cutting fluid supply device equipped with a cutting fluid detection system according to any one of claims 1 to 6.
A method for detecting the quality of a cutting fluid containing water and a water-soluble cutting fluid, A heating unit for locally heating the cutting fluid while immersed in it, A temperature measuring unit is used to measure the temperature of the cutting fluid near the heating unit. A temperature measurement data acquisition step involves acquiring temperature measurement data from a temperature measurement unit, which includes at least post-heating temperature data indicating the temperature of the cutting fluid after heating by the heating unit has started. A detection method for cutting fluids, comprising a temperature measurement data acquisition process and a quality detection process that detects the quality of the cutting fluid based on the temperature measurement data acquired in the temperature measurement data acquisition process.

Description

This invention relates to a cutting fluid detection system for detecting the quality of a cutting fluid, and a cutting fluid supply device equipped therewith. The invention also relates to a cutting fluid detection method for detecting the quality of a cutting fluid. When machining metals or other materials using machine tools, cutting fluid (coolant) is used. This allows for lubrication, cooling, chip removal, and rust prevention at the machining point. Typically, the cutting fluid is pumped from a tank in a cutting fluid supply system and discharged or sprayed towards the machining point. The cutting fluid that flows out of the machining point is generally returned to the cutting fluid tank for reuse. While both water-based and oil-based (water-insoluble) cutting fluids are known, water-based cutting fluids are more commonly used these days due to their superior cooling capabilities and lower environmental impact. Aqueous cutting fluids are obtained by diluting a liquid called a water-soluble cutting fluid with water. At this time, the concentration of the water-soluble cutting fluid in the cutting fluid (hereinafter sometimes simply referred to as "cutting fluid concentration") must be kept within a predetermined range depending on the type of water-soluble cutting fluid and the desired effect. However, even if the cutting fluid is prepared at a predetermined concentration, if it is circulated and used in the machine for a certain period of time, the water in the cutting fluid may evaporate, causing the concentration to deviate from the predetermined range. If the cutting fluid concentration falls outside the predetermined range, the desired effect may not be achieved. In such cases, it is necessary to adjust the concentration of the cutting fluid by adding water or water-soluble cutting fluid. Japanese Patent Publication No. 2023-079348 This is a schematic diagram of a cutting fluid supply device.This is a block diagram of the cutting fluid detection system according to the first embodiment.This figure schematically shows the structure of the sensor chip in the cutting fluid detection system of the first embodiment.This figure shows an example of temperature measurement data acquired by the cutting fluid detection system of the first embodiment.This diagram illustrates the movement of the cutting fluid near the heating element when heating is performed in the heating element.This figure shows an example of temperature measurement data acquired by the cutting fluid detection system of the second embodiment.This is a block diagram of the cutting fluid detection system according to the third embodiment.This figure shows an example of temperature measurement data acquired by the cutting fluid detection system of the third embodiment.This figure shows other structural examples of the heating and temperature sensing sections.This graph shows the results of Experiment 1 and Experiment 2. Preferred embodiments of the present invention will be described more specifically with reference to the drawings. However, the technical scope of the present invention is not limited to the following embodiments. 0. Cutting Fluid Supply Device Figure 1 is a schematic diagram of the cutting fluid supply device 100. The solid arrows (excluding the symbols) in Figure 1 indicate the flow path of the liquid. This cutting fluid supply device 100 is a device for supplying cutting fluid C to a machine tool 200 equipped with a cutting tool. As shown in Figure 1, the cutting fluid supply device 100 comprises a cutting fluid tank 110, a cutting fluid supply pump 120 for drawing cutting fluid C from the cutting fluid tank 110, a cutting fluid supply passage 130 for supplying the cutting fluid C drawn by the cutting fluid supply pump 120 to the machine tool 200, and a cutting fluid return passage 140 for returning the cutting fluid C used by the machine tool 200 back to the cutting fluid tank 110. The cutting fluid tank 110 is divided into a dirty tank 111 for storing cutting fluid C containing a large amount of chips (sludge) discharged from the machine tool 200, and a clean tank 112 for storing cutting fluid C from which chips have been removed (e.g., by a filter or cyclone device). The cutting fluid supply pump 120 is configured to draw the cutting fluid C from the clean tank 112. This cutting fluid supply device 100 uses an aqueous cutting fluid as the cutting fluid C. Aqueous cutting fluids are obtained by diluting a liquid called a water-soluble cutting oil with water. Water-soluble cutting oils are classified into three categories—Type A1 (emulsion), Type A2 (soluble), and Type A3 (solution)—based on the appearance, surface tension, and non-volatile content of the diluted solution obtained by diluting them with water, as specified in JIS K2241. Type A1 water-soluble cutting fluid (emulsion) is a mixture primarily composed of a water-insoluble component (e.g., mineral oil, fatty oil, etc.) and a surfactant. When diluted 10 times wit