An environmental-friendly water-soluble metal processing cutting fluid using device

By adding dodecyl guanidine hydrochloride and alcohol ether carboxylic acid to the cutting fluid, the problems of bacterial growth and poor stability of the cutting fluid are solved, enabling the efficient use of environmentally friendly water-soluble cutting fluid, extending equipment life and reducing costs.

CN116765919BActive Publication Date: 2026-04-24CHONGQING DEMONT TECH DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING DEMONT TECH DEV CO LTD
Filing Date
2021-07-15
Publication Date
2026-04-24

AI Technical Summary

Technical Problem

Existing cutting fluids are prone to failure due to bacterial growth during use, leading to frequent replacements, wasting resources, and corroding processing equipment. Furthermore, traditional cutting fluids have poor stability in acidic or alkaline environments and are prone to foaming.

Method used

By adding dodecyl guanidine hydrochloride and alcohol ether carboxylic acid, bacterial growth is inhibited and the cutting fluid is kept stable in acidic and alkaline environments. Ultrasonic and electromagnetic stirring methods are used to ensure uniform mixing.

Benefits of technology

It improves the antibacterial properties and stability of the cutting fluid, reduces waste, extends the service life of processing equipment, lowers costs, and maintains a good cooling effect.

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Abstract

The present application belongs to the technical field of cutting fluid, and particularly relates to a device for using an environmentally-friendly water-soluble metal processing cutting fluid. The device comprises a machine tool and a device for processing, the device is fixedly installed on the machine tool by means of bolts, the machine tool is provided with a groove, the cutting fluid tank is placed in the groove, the cutting fluid tank is filled with cutting fluid, the top of the cutting fluid tank is provided with an opening for adding cutting fluid, the cutting fluid tank is provided with a stirring shaft, the output shaft of the motor is welded together with the stirring shaft; the stirring shaft is rotatably connected with the bottom of the cutting fluid, the stirring shaft is welded with helical blades, when the stirring shaft rotates forward, the helical blades will make the cutting fluid move upward, so that the cutting fluid contacts with air; when the stirring shaft reverses, the helical blades will make the cutting fluid move downward, so that the cutting fluid is extruded, and the pressure of the cutting fluid is increased. The present application controls the temperature of the cutting fluid, reduces the temperature change of the cutting fluid, prevents the processing device from being damaged due to the large temperature change of the cutting fluid, and increases the service life of the processing device.
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Description

[0001] This application is a divisional application of the patent application filed on July 15, 2021, with application number 202110799401.8 and invention title "An Environmentally Friendly Water-Soluble Metalworking Cutting Fluid". Technical Field

[0002] This invention belongs to the field of cutting fluid technology, specifically relating to an apparatus for using an environmentally friendly water-soluble metalworking cutting fluid. Background Technology

[0003] Cutting fluid (or coolant) is an industrial liquid used in metal cutting and grinding processes to cool and lubricate cutting tools and workpieces. It is scientifically formulated with a variety of high-performance additives, possessing excellent cooling, lubrication, rust prevention, degreasing and cleaning properties, corrosion protection, and easy dilution. It overcomes the shortcomings of traditional soap-based emulsions, such as odor in summer, difficulty in dilution in winter, and poor rust prevention. It also has no adverse effects on lathe paint and is suitable for cutting and grinding ferrous metals, making it a leading grinding product currently available.

[0004] Application number CN201410548551.1 discloses a fully synthetic lubricating and rust-preventing composition for cutting processes. The composition comprises the following components by mass percentage: 30.0%–40.0% self-emulsifying synthetic ester, 25.0%–35.0% dicarboxylic acid, 25.0%–35.0% pH adjuster, and 10.0%–20.0% softened water. It has excellent lubricity, rust prevention, cooling, and cleaning properties, effectively reducing friction during metal processing, lowering frictional heat, and ensuring the surface finish of the processed workpiece. Adding 10.0%–20.0% of the composition of this invention to tap water can produce a transparent and stable fully synthetic cutting fluid concentrate. This concentrate, when diluted with tap water to a 5.0% concentration, is a cutting fluid that can be directly used for cutting and grinding cast iron and steel, meeting the requirements for lubrication and rust prevention. However, in the above solution, when the cutting fluid is used on the processing equipment for a short period of time and at a low frequency, it cannot fully contact the air. The bacteria growing in the cutting fluid are anaerobic, which easily leads to bacterial growth and reproduction, resulting in waste and failure of the cutting fluid. Therefore, it is necessary to further improve the antibacterial properties of the cutting fluid. Summary of the Invention

[0005] This solution provides an environmentally friendly water-soluble metalworking cutting fluid with improved antibacterial properties.

[0006] To achieve the above objectives, this solution provides an environmentally friendly water-soluble metalworking cutting fluid, comprising: 20.0%–40.0% self-emulsifying synthetic ester, 20.0%–30.0% dicarboxylic acid, 25.0%–35.0% pH adjuster, 5.0%–25.0% softened water, 0.5%–8.0% dodecyl guanidine hydrochloride, and 5.0%–14.0% alcohol ether carboxylic acid.

[0007] The principle of this solution is as follows: Dodecyl guanidine hydrochloride can kill three types of bacteria, namely TGB, SRB and FB, effectively inhibiting bacterial growth in the cutting fluid and improving the antibacterial properties of the cutting fluid. At the same time, it can improve the stability of the cutting fluid. Alcohol ether carboxylic acid can overcome the shortcomings of anionic surfactants in resisting hard water and nonionic surfactants in dispersing ability of calcium soap. Alcohol ether carboxylic acid does not foam violently and has excellent anti-electrolyte stability in acidic and alkaline environments, which can improve the cutting fluid's anti-hardening ability.

[0008] The beneficial effects of this solution are as follows: By adding dodecyl guanidine hydrochloride, this solution effectively inhibits bacterial growth in the cutting fluid; at the same time, it maintains the stability of substances in the cutting fluid, thereby improving the stability of the cutting fluid; it is environmentally friendly and pollution-free; it effectively inhibits bacterial growth, reduces corrosion to processing equipment, and extends the service life of processing equipment; it does not foam violently, resulting in better cooling and flushing effects, reducing the loss of cutting fluid and lowering costs; and it facilitates and quickly recovers the cutting fluid.

[0009] Furthermore, it contains 26.0% self-emulsifying synthetic lipids, 25.0% dicarboxylic acids, 25.0% pH adjuster, 10.0% softened water, 4.0% dodecyl guanidine hydrochloride, and 10.0% alcohol ether carboxylic acids.

[0010] Furthermore, a method for preparing an environmentally friendly water-soluble metalworking cutting fluid includes the following steps:

[0011] Step 1: Prepare the self-emulsifying synthetic ester, dicarboxylic acid, pH adjuster, softened water, dodecyl guanidine hydrochloride, and alcohol ether carboxylic acid according to the specified proportions; Step 2: Add the self-emulsifying synthetic ester to the reactor and heat to 60℃~75℃; Step 3: Mix the dicarboxylic acid, dodecyl guanidine hydrochloride, and alcohol ether carboxylic acid evenly and add them to the reactor; Step 4: Add the pH adjuster and softened water to the reactor and stir evenly at 5℃~10℃ for 20~50 minutes to obtain the cutting fluid.

[0012] Furthermore, in step 1, the mass ratio of emulsified synthetic lipid, dicarboxylic acid, and pH adjuster is 1.04:1:1.

[0013] Furthermore, in step 1, the softened water contains 0.1%-0.3% sodium tripolyphosphate or diethylaminetetraacetate to soften the water and improve the cutting fluid's resistance to hardening.

[0014] Furthermore, in step 4, electromagnetic stirring is used to uniformly stir the mixture in the reactor. This ensures that the substances are mixed as thoroughly as possible and that they are evenly distributed.

[0015] Furthermore, in step 4, an electrically controlled mechanical stirring method with a propeller-type stirring head is used to uniformly stir the mixture in the reactor. The stirring head rotates at a speed of 150–250 rpm. This ensures that the substances are mixed as thoroughly as possible and that the substances are evenly distributed.

[0016] Furthermore, in step 4, ultrasound is used to oscillate the mixture, and the ultrasound disperses the mixture to ensure thorough mixing of the substances.

[0017] This solution effectively inhibits bacterial growth in cutting fluid by adding dodecyl guanidine hydrochloride and alcohol ether carboxylic acid, thereby improving the antibacterial properties and stability of the cutting fluid. Alcohol ether carboxylic acid can overcome the shortcomings of anionic surfactants in resisting hard water and nonionic surfactants in dispersing ability of calcium soap. Alcohol ether carboxylic acid does not foam violently and has excellent anti-electrolyte stability in acidic and alkaline environments, which can improve the cutting fluid's anti-hardening ability. Attached Figure Description

[0018] Figure 1 The growth curve of SRB bacteria after 15 days is shown in Example 3 of this invention with the addition of dodecyl guanidine hydrochloride cutting fluid.

[0019] Figure 2 This is a schematic diagram of an environmentally friendly water-soluble metalworking cutting fluid application device according to Embodiment 4 of the present invention.

[0020] Figure 3 This is a logic block diagram of an environmentally friendly water-soluble metalworking cutting fluid application device according to Embodiment 4 of the present invention. Detailed Implementation

[0021] The following detailed explanation illustrates the specific implementation methods:

[0022] Figure descriptions: 1. Machine tool; 2. Equipment; 3. Nozzle; 4. Pipeline; 5. Liquid pump; 6. Coolant tank; 7. Stirring shaft; 8. Spiral blade; 9. Camera; 10. Vibration sensor; 11. Motor.

[0023] Example 1:

[0024] This embodiment provides an environmentally friendly water-soluble metalworking cutting fluid, comprising: 20.0%–40.0% self-emulsifying synthetic ester (in this embodiment, the mass fraction of self-emulsifying synthetic ester is 26.0%), 20.0%–30.0% dicarboxylic acid (in this embodiment, the mass fraction of dicarboxylic acid is 25.0%), 25.0%–35.0% pH adjuster (in this embodiment, the mass fraction of pH adjuster is 25.0%), 5.0%–25.0% softened water (in this embodiment, the mass fraction of softened water is 10.0%), 0.5%–5% dodecyl guanidine hydrochloride (in this embodiment, the mass fraction of dodecyl guanidine hydrochloride is 2.0%), and 3.0%–10.0% alcohol ether carboxylic acid (in this embodiment, the mass fraction of alcohol ether carboxylic acid is 12.0%).

[0025] The above-mentioned method for preparing environmentally friendly water-soluble metalworking cutting fluid includes the following steps:

[0026] Step 1: Prepare the self-emulsifying synthetic lipid, dicarboxylic acid, pH adjuster, softened water, dodecyl guanidine hydrochloride and alcohol ether carboxylic acid according to the mass fraction ratio; the softened water contains 0.1%-0.3% sodium tripolyphosphate or diethylaminetetraacetate to soften the water and improve the cutting fluid's anti-hardening ability; in this embodiment, the dicarboxylic acid is a mixture of long-chain dicarboxylic acid and short-chain dicarboxylic acid.

[0027] Step 2: Add the self-emulsifying synthetic ester to the reactor and heat to 60℃~75℃;

[0028] Step 3: Mix the dicarboxylic acid, dodecyl guanidine hydrochloride and alcohol ether carboxylic acid evenly and then add them to the reaction vessel;

[0029] Step 4: Add the pH adjuster and softened water to the reactor and stir at 5℃~10℃ for 20~50 minutes to obtain the cutting fluid. Electromagnetic stirring can be used to uniformly stir the mixture in the reactor, ensuring thorough mixing and even distribution of the substances. Alternatively, an electrically controlled mechanical stirring device with a propeller-type stirring head can be used to uniformly stir the mixture in the reactor at a speed of 150~250 rpm. This also ensures thorough mixing and even distribution of the substances.

[0030] When thoroughly mixing the substances, ultrasound is used to oscillate the mixture. The ultrasound disperses the mixture, ensuring thorough mixing.

[0031] Example 2: This example differs from Example 1 in that an environmentally friendly water-soluble metalworking cutting fluid comprises: 26.0% self-emulsifying synthetic ester, 25.0% dicarboxylic acid, 25.0% pH adjuster, 10.0% softened water, 3.2% dodecyl guanidine hydrochloride, and 11.8% alcohol ether carboxylic acid.

[0032] Example 3: This example differs from Example 1 in that an environmentally friendly water-soluble metalworking cutting fluid comprises: 26.0% self-emulsifying synthetic ester, 25.0% dicarboxylic acid, 25.0% pH adjuster, 10.0% softened water, 4.0% dodecyl guanidine hydrochloride, and 10% alcohol ether carboxylic acid.

[0033] Example 4: This example differs from Example 1 in that it provides an application device for an environmentally friendly water-soluble metalworking cutting fluid, as shown in the attached document. Figure 2 As shown, the specific components include: a machine tool 1 and a processing device 2. The device 2 is bolted to the machine tool 1. The machine tool 1 has a groove in which a cutting fluid tank 6 is placed. The cutting fluid tank 6 is filled with cutting fluid, and the top of the tank has an opening for adding cutting fluid. A sealing cap is provided on the surface of the cutting fluid to seal the opening and prevent dust and other impurities from entering the tank and contaminating the cutting fluid. The cutting fluid tank 6 contains a stirring shaft 7. A motor 11, which drives the stirring shaft 7, is bolted to the tank 6. The motor 11 is located at the top of the tank, and its output shaft is welded to the stirring shaft 7. The stirring shaft 7 is rotatably connected to the bottom of the tank. A spiral blade 8 is welded to the stirring shaft 7. When the stirring shaft 7 rotates clockwise, the spiral blade 8 causes the cutting fluid to move upwards, allowing it to contact the air. When the stirring shaft 7 rotates counterclockwise, the spiral blade 8 causes the cutting fluid to move downwards, compressing the fluid and increasing its pressure.

[0034] A liquid pump 5 is bolted onto machine tool 1. The liquid pump 5 is a Galileo stainless steel SB-3-1 (explosion-proof) oil pump. One end of the liquid pump 5 is connected to the cutting fluid tank 6, and the other end is connected to a pipe 4. The pipe 4 is connected to a nozzle 3. Both the pipe 4 and the nozzle 3 are fixedly installed on the machine frame. The nozzle 3 is used to spray cutting fluid onto the equipment 2, and the cutting fluid cools down the equipment 2.

[0035] The system also includes a nozzle 3 frequency acquisition module, which collects the vibration frequency of the nozzle 3. In this embodiment, a vibration sensor 10 is used for frequency acquisition; the specific model of the vibration sensor 10 is 6011975IM12-04NPS-ZW1. The vibration sensor 10 is bolted to the surface of the nozzle 3 and is used to collect the vibration frequency of the nozzle 3. When the cutting fluid sprayed from the nozzle 3 is unevenly mixed, the nozzle 3 will be subjected to irregular impacts; when the cutting fluid sprayed from the nozzle 3 is uniformly mixed and in a colloidal state, the vibration sensor 10 will be subjected to uniform impacts. A PLC controller is bolted to the machine tool 1. Specifically, the controller uses an STM32F103C8T6 microcontroller. The PLC controller is electrically connected to both the vibration sensor 10 and the motor 11. The frequency acquisition module acquires the frequency data of the nozzle 3 every 30 seconds and then compares the frequency growth rate. When the frequency growth rate is greater than the set frequency growth rate, a stirring signal is sent to the PLC controller.

[0036] The system also includes a smoke recognition module, which collects smoke information from device 2. When the flash point of the cutting fluid is too low or the temperature is too high, the splashed cutting fluid will emit smoke. Excessive cutting fluid temperature can damage the processing equipment, and the cooling effect is poor. In this embodiment, the smoke recognition module uses a Huawei Hikey970AI artificial intelligence development board and a camera 9 (a C12 network camera) to capture images of device 2. The camera 9 transmits the data to the Huawei Hikey970AI artificial intelligence development board. The smoke recognition module captures a frame of the monitoring video every 2 seconds and uses the K-Meas algorithm to identify and fit the smoke plumes to obtain a suspected image. The smoke recognition module stores a smoke plume model trained using a convolutional neural network algorithm based on various smoke plume images. The smoke recognition module inputs the suspected image into the smoke plume model to obtain the smoke plume fitting degree. When the smoke plume fitting degree is greater than a first threshold or the smoke rise rate is greater than a second threshold, it outputs that a smoke plume has been identified. If a smoke plume is identified, a smoke signal is sent to the analysis module at 5-second intervals within 30 seconds.

[0037] When using cutting fluid to cool equipment 2, the frequency acquisition module collects the vibration frequency of nozzle 3. The module acquires nozzle 3 frequency data every 30 seconds and compares the frequency growth rate. When the frequency growth rate exceeds the set frequency growth rate, a stirring signal is sent to the PLC controller. Upon receiving the stirring signal, the PLC controller starts motor 11, causing it to rotate forward. Motor 11 drives the stirring shaft 7 and the spiral blades 8 to stir the cutting fluid. The smoke detection module collects smoke information from equipment 2. Every 2 seconds, the smoke detection module captures a frame of the monitoring video image and uses the K-Meas algorithm to identify and fit the smoke plumes to obtain a suspected shape. The smoke detection module stores smoke plume models trained using a convolutional neural network algorithm based on various smoke plume shapes. The smoke detection module inputs the suspected shape into the smoke plume model to obtain the smoke plume fit degree. When the smoke plume fit degree is greater than a first threshold or the smoke rise rate is greater than a second threshold, the module outputs that the smoke plume has been identified. If a smoke plume is detected, a smoke signal is sent to the analysis module to the PLC controller within 30 seconds at 5-second intervals. The PLC controller then reverses the rotation, causing the stirring shaft 7 and the spiral blades to rotate. This causes the cutting fluid to move downwards, increasing its pressure and enhancing its cooling effect. The stirring shaft 7 is controlled in real-time by varying the frequency of the nozzle 3 to agitate the cutting fluid, ensuring uniform mixing and improved cooling performance. The smoke detection module analyzes the smoke emitted from the cutting fluid at device 2, controlling the rotation of the stirring shaft 7 and spiral blades accordingly. When the stirring shaft 7 rotates forward, the spiral blades 8 cause the cutting fluid to move upwards, increasing its contact with air and thus the amount of gas in the cutting fluid, saving costs. When the stirring shaft 7 rotates in reverse, the spiral blades 8 cause the cutting fluid to move downwards, compressing it and increasing its pressure, further enhancing its cooling effect. By controlling the stirring shaft, the temperature of the cutting fluid is controlled, minimizing temperature fluctuations and preventing damage to the processing equipment due to large temperature variations, thereby increasing the equipment's lifespan.

[0038] Comparative Example 1: The difference between this example and Example 1 is that an environmentally friendly water-soluble metalworking cutting fluid includes: 26.0% self-emulsifying synthetic ester, 25.0% dicarboxylic acid, 25.0% pH adjuster, 14.0% softened water, 0.0% dodecyl guanidine hydrochloride, and 10.0% alcohol ether carboxylic acid.

[0039] Comparative Example 2: This example differs from Example 1 in that an environmentally friendly water-soluble metalworking cutting fluid comprises: 26.0% self-emulsifying synthetic ester, 25.0% dicarboxylic acid, 25.0% pH adjuster, 20.0% softened water, 4.0% dodecyl guanidine hydrochloride, and 0.0% alcohol ether carboxylic acid.

[0040] Comparative Example 3: The difference between this example and Example 1 is that an environmentally friendly water-soluble metalworking cutting fluid includes: 26.0% self-emulsifying synthetic ester, 25.0% dicarboxylic acid, 25.0% pH adjuster, 24.0% softened water, 0.0% dodecyl guanidine hydrochloride, and 0.0% alcohol ether carboxylic acid.

[0041] For easy and intuitive comparison, we have listed the components and contents of Examples 1-4 and Comparative Examples 1-3 in Table 1:

[0042]

[0043] Antibacterial tests were conducted on all cutting fluids prepared in the examples and comparative examples. 200 mL glass containers were prepared, and 100 mL of each of the cutting fluids prepared in Examples 1-3 and Comparative Examples 1-3 were added. The containers were placed at 37°C for 2 weeks, followed by pH and microbial testing. The degree of pH decrease and the extent of microbial growth were used to determine the spoilage state of the test solutions. Specific results are shown in Table 2.

[0044] Serial Number pH value Microbial count (number / ml) Example 1 3.5 60 Example 2 4 52 Example 3 6.7 20 Comparative Example 1 3 79 Comparative Example 2 4.5 24 Comparative Example 3 3.1 72

[0045] According to Examples 1, 2, 3, 4, Comparative Examples 1, 2, and 3, the addition of dodecyl guanidine hydrochloride can effectively inhibit bacterial growth in cutting fluid, slow down the rate of cutting fluid spoilage, and effectively improve the antibacterial properties of cutting fluid.

[0046] The growth curve of SRB bacteria in the cutting fluid of Comparative Example 2 after 15 days is shown in the attached figure. Figure 1 As shown in Examples 1-3 and Comparative Examples 1-3, it can be demonstrated that the addition of dodecyl guanidine hydrochloride can effectively inhibit bacterial growth in the cutting fluid and improve its antibacterial properties. This demonstrates that the addition of dodecyl guanidine hydrochloride in this solution can effectively inhibit bacterial growth and improve the stability of the cutting fluid. Simultaneously, alcohol ether carboxylic acid can overcome the shortcomings of anionic surfactants (poor resistance to hard water) and nonionic surfactants (calcium soap dispersion ability). Alcohol ether carboxylic acid does not foam violently and exhibits excellent electrolyte stability in acidic and alkaline environments, thus improving the cutting fluid's resistance to hardening. It is environmentally friendly and pollution-free; effectively inhibits bacterial growth, reduces corrosion of processing equipment, and extends the service life of processing equipment; does not foam violently, resulting in better cooling and rinsing effects, reducing cutting fluid loss and lowering costs; and facilitates convenient and rapid recovery of the cutting fluid.

[0047] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for using an environmentally friendly water-soluble metalworking cutting fluid, characterized in that: The system includes a machine tool (1) and a processing device (2). The device (2) is bolted to the machine tool (1). The machine tool (1) has a groove in which a cutting fluid tank (6) is placed. The cutting fluid tank (6) is filled with cutting fluid. The top of the cutting fluid tank has an opening for adding cutting fluid. The cutting fluid tank (6) has a stirring shaft (7). A motor (11) that drives the stirring shaft (7) to rotate is bolted to the cutting fluid tank (6). The motor (11) is located on top of the cutting fluid tank (6). The output shaft of the motor (11) is welded to the stirring shaft (7). The stirring shaft (7) is rotatably connected to the bottom of the cutting fluid tank. A spiral blade (8) is welded to the stirring shaft (7). When the stirring shaft (7) rotates forward, the spiral blade (8) causes the cutting fluid to move upward, making the cutting fluid come into contact with the air. When the stirring shaft (7) rotates in reverse, the spiral blade (8) causes the cutting fluid to move downward, squeezing the cutting fluid and making the cutting fluid rotate. As the pressure of the liquid increases, a liquid pump (5) is bolted on the machine tool (1). One end of the liquid pump (5) is connected to the cutting fluid tank (6), and the other end is connected to the pipe (4). The pipe (4) is connected to the nozzle (3). The pipe (4) and the nozzle (3) are both fixedly installed on the machine frame. The nozzle (3) is used to spray cutting fluid onto the equipment (2). The cutting fluid cools down the equipment (2). The machine tool also includes a nozzle frequency acquisition module. The nozzle frequency acquisition module is used to acquire the vibration frequency of the nozzle (3). The vibration sensor (10) is used for frequency acquisition. The vibration sensor (10) is bolted on the surface of the nozzle (3). The vibration sensor (10) is used to acquire the vibration frequency of the nozzle (3). When the cutting fluid sprayed by the nozzle (3) is unevenly mixed, the nozzle (3) will be subjected to irregular impacts. When the cutting fluid sprayed by the nozzle (3) is evenly mixed and in a colloidal state, the vibration sensor (10) will be subjected to uniform impacts.

2. The device for using an environmentally friendly water-soluble metalworking cutting fluid according to claim 1, characterized in that: A PLC controller is bolted on the machine tool (1). The PLC controller is electrically connected to the vibration sensor (10) and the motor (11). The frequency acquisition module acquires the frequency data of the nozzle (3) every 30 seconds, and then compares the frequency growth rate. When the frequency growth rate is greater than the set frequency growth rate, a stirring signal is sent to the PLC controller.

3. The device for using an environmentally friendly water-soluble metalworking cutting fluid according to claim 2, characterized in that: It also includes a smoke recognition module, which is used to collect smoke information from the device (2). The smoke recognition module captures a frame of the monitoring video every 2 seconds and uses the K-Meas algorithm to identify and fit the smoke cloud to obtain a suspected image. The smoke recognition module stores a smoke cloud model trained by the convolutional neural network algorithm based on various smoke cloud images. The smoke recognition module inputs the suspected image into the smoke cloud model to fit and obtain the smoke cloud fitting degree. When the smoke plume fitting degree is greater than the first threshold, the output indicates that a smoke plume has been identified; if a smoke plume is identified, a smoke condition signal is sent to the analysis module at 5-second intervals within 30 seconds.

4. The device for using an environmentally friendly water-soluble metalworking cutting fluid according to claim 2, characterized in that: The controller uses an STM32F103C8T6 microcontroller.

5. The device for using an environmentally friendly water-soluble metalworking cutting fluid according to claim 1, characterized in that: The pump (5) is a Galileo stainless steel SB-3-1 oil pump.

6. The device for using an environmentally friendly water-soluble metalworking cutting fluid according to claim 1, characterized in that: The vibration sensor (10) is model number 6011975IM12-04NPS-ZW1.

7. The device for using an environmentally friendly water-soluble metalworking cutting fluid according to claim 3, characterized in that: The smoke recognition module uses a Huawei Hikey970AI artificial intelligence development board and a camera (9) to capture images of the device (2). The camera (9) is a C12 network camera, and the camera (9) transmits the data to the Huawei Hikey970AI artificial intelligence development board.

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