Metal chip machine tool liquid gas mixed chip removal cooling method and system

Abstract

This invention discloses a liquid-gas mixing cooling method and system for metal cutting machine tools, aiming to solve the problems of high cutting fluid consumption and high recycling costs in existing methods. The method uses sensors to monitor the temperature signal of the machine tool in real time and transmits the temperature signal to a controller. The controller receives the temperature signal and adjusts the output flow rate of compressed air and cutting fluid according to preset control logic. The compressed air and cutting fluid mix in a nozzle to form a mist-like mixed airflow, which is then sprayed onto the tool according to the controller's instructions. This invention significantly reduces cutting fluid consumption and waste fluid treatment volume while ensuring effective cooling and chip removal, thereby lowering processing costs and adapting to various metal processing scenarios.

Description

Technical Field

[0001] This invention relates to the field of cooling media technology used in machining, specifically to a liquid-gas mixing and chip removal cooling method and system for metal cutting machine tools. Background Technology

[0002] In the field of machining, a large amount of heat is generated during the cutting process, and metal chips easily adhere to the cutting edge and machining area, directly affecting tool life, workpiece machining accuracy, and surface quality. Therefore, the application of cooling media is crucial. Its main functions are to cool and lubricate the tool and flush away chips, ensuring a stable and efficient machining process.

[0003] Currently, the cooling media widely used in the industry are mainly water-based solutions or oil-based cutting fluids. Their working mode involves a circulating pump driving a continuous, uninterrupted jet of cooling fluid onto the cutting area of ​​the tool, maintaining a constant flow rate. Relying on the fluid's flow heat transfer and physical lubrication properties, they achieve a comprehensive function of cooling, lubrication, and chip removal. However, existing technologies have significant drawbacks: First, the consumption of cutting fluid is enormous. Due to the constant flow continuous jet design, a fixed flow rate of cooling fluid is continuously output regardless of tool temperature or cutting load, making dynamic adjustment impossible based on actual machining conditions, leading to severe resource waste. Second, the cost of waste cutting fluid treatment is high. The large volume of waste cutting fluid generated after extensive use requires complex filtration, separation, and purification processes for recycling, increasing equipment investment and operating costs, and posing a risk of incomplete treatment. Third, the environmental impact is significant. The oil and chemical additives contained in waste cutting fluid can easily seep into the soil and pollute water bodies if not properly disposed of, causing continuous harm to the ecological environment. Fourth, the adaptability to different operating conditions is poor. When the cutting tool is at room temperature or under low cutting load, the continuous spraying of cutting fluid not only fails to achieve the optimal match between cooling and cleaning efficiency, but also further exacerbates resource waste and environmental pressure.

[0004] With the increasing demand for energy conservation, environmental protection, and high-efficiency production in the machining industry, existing continuous constant-flow cooling solutions using water-based solutions or oils as media are no longer sufficient to meet the industry's development requirements. Therefore, there is an urgent need for a cooling technology solution that can adjust the cooling supply on demand, reduce cutting fluid consumption, and minimize environmental impact, achieving the dual goals of resource conservation and environmental friendliness while ensuring machine tool cutting efficiency and machining quality. Summary of the Invention

[0005] Therefore, the present invention provides a liquid-gas mixing and chip cooling method and system for metal cutting machine tools to solve the problems of large consumption of cutting fluid, high recycling cost, environmental pollution and poor adaptability of existing cutting fluids.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a liquid-gas mixing and chip removal cooling method for metal cutting machine tools, comprising the following steps:

[0007] S1. Monitor the temperature signal of the machine tool cutting tool in real time through a sensor, and transmit the temperature signal to the controller;

[0008] S2. The controller receives the temperature signal and adjusts the output flow rate of compressed air and the output flow rate of cutting fluid according to preset control logic.

[0009] S3. The compressed air and the cutting fluid are mixed in the nozzle to form a mist-like mixed airflow, and the nozzle sprays the mixed airflow onto the tool according to the instructions of the controller.

[0010] As a preferred embodiment of the liquid-gas mixing chip removal cooling method for metal cutting machine tools, the proportion formula of the cutting fluid in the mixed airflow is:

[0011]

[0012] In the formula, The volume ratio of the cutting fluid in the mixed airflow; This refers to the cutting fluid flow rate. For compressed air flow, and The value range is 10% to 90%.

[0013] As a preferred embodiment of the liquid-gas mixing chip removal cooling method for metal cutting machine tools, the sensor is an infrared temperature sensor that monitors the tool temperature in real time. The tool temperature deviation formula is:

[0014]

[0015] In the formula, T is the real-time temperature of the cutting tool; ΔT is the tool room temperature threshold; ΔT is the tool temperature deviation; and =20℃.

[0016] As a preferred solution for the liquid-gas mixing and chip removal cooling method in metal cutting machine tools, the formula for controlling the cutting fluid flow rate and valve opening is:

[0017]

[0018]

[0019] In the formula, k is a preset proportionality coefficient. The cutting fluid flow rate; ΔT represents the maximum cutting fluid flow rate; ΔT represents the tool temperature deviation. This is the temperature deviation threshold when the cutting fluid flow rate reaches its maximum value; This refers to the opening degree of the cutting fluid valve; This represents the maximum opening degree of the cutting fluid valve.

[0020] As a preferred embodiment of the liquid-gas mixing chip removal cooling method for metal cutting machine tools, the nozzle adopts an intermittent injection mode, and the formula for the intermittent injection time parameter is:

[0021]

[0022]

[0023] In the formula, D is the jet duty cycle; This refers to the injection cycle; The duration of a single spray from a single nozzle; This refers to the single stop time for a single nozzle.

[0024] As a preferred embodiment of the liquid-gas mixing chip removal cooling method for metal cutting machine tools, the spraying times of the two sets of nozzles are staggered. Let the spraying state of nozzle 1 be... The spray state of nozzle 2 is The state function for the dual-nozzle staggered injection is:

[0025]

[0026]

[0027] In the formula, n = 0, 1, 2, ...; t is the real-time variable.

[0028] As a preferred solution for the liquid-gas mixed chip removal cooling method in metal cutting machine tools, the formula for tool thermal balance and heat dissipation rate is:

[0029]

[0030]

[0031] In the formula, The heat generation rate of the cutting tool during the cutting process. C is the heat dissipation rate carried away by the mixed airflow, and C is the specific heat capacity of the cutting tool. The mass of the cutting tool participating in heat exchange; denoted as , where A is the convective heat transfer coefficient between the gas-liquid mixture and the cutting tool; A is the heat transfer area between the cutting tool and the gas-liquid mixture; and T is the real-time temperature of the cutting tool. The temperature of the mixed airflow;

[0032] The convective heat transfer formula is:

[0033]

[0034] In the formula, The heat transfer coefficient is for pure air. This is the proportionality coefficient; The proportion of the cutting fluid volume in the mixed airflow.

[0035] As a preferred embodiment of the liquid-gas mixing chip cooling method for metal cutting machine tools, the inner wall of the main nozzle of the nozzle is provided with a coolant nozzle, the diameter of the coolant nozzle is smaller than the diameter of the main nozzle, and the angle between the coolant nozzle and the airflow direction is 30°.

[0036] As a preferred embodiment of the liquid-gas mixing chip cooling method for metal cutting machine tools, the two sets of nozzles are arranged at a 45° angle to the horizontal direction, and the two sets of nozzles are arranged at a 90° angle to the tool axis direction.

[0037] This invention also provides a liquid-gas mixing chip cooling system for metal cutting machine tools, employing the method described in any of the above-mentioned embodiments, comprising:

[0038] Monitoring and transmission unit: used to monitor the temperature signal of the machine tool cutting tool in real time through sensors and transmit the temperature signal to the controller;

[0039] The receiving and regulating unit is used by the controller to receive the temperature signal and adjust the output flow rate of compressed air and the output flow rate of cutting fluid according to preset control logic.

[0040] Mixed injection unit: used to mix the compressed air and cutting fluid in the nozzle to form a mist-like mixed airflow, and the nozzle sprays the mixed airflow onto the tool according to the instructions of the controller.

[0041] The present invention has the following advantages:

[0042] First, this invention replaces part of the cutting fluid with compressed air and dynamically adjusts the cutting fluid ratio by temperature feedback. At room temperature, only air is sprayed, and fluid is supplied as needed, which greatly reduces the amount of water-based solutions or oils used.

[0043] Secondly, the reduced amount of cutting fluid used in this invention directly reduces the amount of waste fluid generated, thereby reducing the environmental impact on soil and water bodies and lowering the pollution risk of waste fluid recycling and treatment.

[0044] Third, this invention reduces the cost of cutting fluid procurement, waste fluid disposal costs, and energy consumption costs for continuous operation of the circulating pump, resulting in a more advantageous overall operating cost.

[0045] Fourth, the present invention provides uniform heat exchange through a mist-like mixed airflow. Combined with two sets of nozzles at specific angles and intermittent staggered spraying, it thoroughly cleans and prevents chips from adhering.

[0046] Fifth, the temperature feedback and program control of this invention enable precise matching of cooling supply with cutting conditions, ensuring machine tool cutting efficiency while reducing tool wear and improving workpiece machining accuracy. Attached Figure Description

[0047] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0048] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0049] Figure 1 This is a schematic flowchart of a liquid-gas mixing and chip removal cooling method for a metal cutting machine tool, provided by an embodiment of the present invention.

[0050] Figure 2 This invention provides a technical architecture diagram of a liquid-gas mixing and chip removal cooling method for metal cutting machine tools.

[0051] Figure 3 A flow rate-time relationship curve of a dual-nozzle intermittent staggered spray method for cooling and removing chips using a liquid-gas mixture in a metal cutting machine tool, provided in an embodiment of the present invention;

[0052] Figure 4 The present invention provides a structure and airflow direction diagram of a liquid-gas mixing chip removal cooling system for a metal cutting machine tool.

[0053] Figure 5 This is a schematic diagram of a liquid-gas mixing chip removal and cooling system architecture for a metal cutting machine tool, provided as an embodiment of the present invention. Detailed Implementation

[0054] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] Example 1

[0056] See Figure 1 , Figure 2 and Figure 3 This invention provides a method for cooling metal cutting machine tools by mixing liquid and gas to remove chips, comprising the following steps:

[0057] S1. Monitor the temperature signal of the machine tool cutting tool in real time through a sensor, and transmit the temperature signal to the controller;

[0058] Specifically, the sensor is the main sensing element of the entire control system. Its function is to convert the physical temperature of the cutting tool into a transmittable and calculable electrical signal. The purpose of transmitting the temperature signal to the controller is to provide a quantitative basis for subsequent flow rate adjustment, solving the shortcomings of existing technologies that require constant flow of cutting fluid and cannot dynamically adjust it according to the actual heating state of the cutting tool, thus laying the foundation for on-demand fluid supply.

[0059] S2. The controller receives the temperature signal and adjusts the output flow rate of compressed air and the output flow rate of cutting fluid according to preset control logic.

[0060] Specifically, the controller is the primary decision-maker in the system, and the preset control logic is essentially a dynamic adjustment rule based on temperature and flow rate matching. In existing technologies, both cutting fluid and air are supplied at constant rates, leading to wasted cutting fluid or insufficient cooling. The cutting load on the tool is determined by the temperature signal (higher temperatures generate more heat, requiring stronger cooling / lubrication), and the flow rates of both media are adjusted accordingly. This ensures that compressed air effectively flushes away chips while achieving precise cooling and lubrication through cutting fluid flow rate regulation, balancing efficiency with energy and material consumption. The adjustment logic needs to incorporate subsequent temperature deviations and flow rate formulas to transform the abstract temperature signal into specific flow rate parameters, ensuring precise adjustment.

[0061] S3. The compressed air and the cutting fluid are mixed in the nozzle to form a mist-like mixed airflow, and the nozzle sprays the mixed airflow onto the tool according to the instructions of the controller.

[0062] Specifically, the nozzle is the main actuator. The design of mixing air and liquid to form a mist-like airflow combines the advantages of both compressed air and cutting fluid. Pure compressed air has strong scouring force but lacks cooling and lubrication effects, while pure cutting fluid provides good cooling and lubrication but has weak scouring force and requires a large amount. When compressed air flows at high speed, it generates negative pressure, drawing in the cutting fluid and breaking it into tiny droplets (mist). This retains the scouring force of air (which can quickly remove chips) while utilizing the large contact area of ​​the mist droplets to improve heat dissipation efficiency. At the same time, the cutting fluid is consumed in mist form, resulting in a much lower consumption rate than traditional continuous flow systems. The nozzle sprays according to controller instructions, ensuring that the flow rate and concentration of the mixed airflow are precisely matched to the tool temperature requirements, avoiding indiscriminate spraying.

[0063] In one possible embodiment, the proportion of the cutting fluid in the mixed airflow is calculated as follows:

[0064]

[0065] In the formula, The volume ratio of the cutting fluid in the mixed airflow; This refers to the cutting fluid flow rate. For compressed air flow, and The value range is 10% to 90%.

[0066] Specifically, When the air content is 10%, the air content is high, which focuses on flushing away chips and is suitable for low-load cutting and low tool temperature scenarios. When the cutting fluid content is 90%, the proportion is high, focusing on cooling and lubrication, suitable for high-load cutting and high-tool-temperature scenarios; this solves the problem that existing technologies using a single medium cannot meet both needs. The formula is... and Dynamic adjustment realization The controller can calculate the required temperature based on the temperature signal. and This ensures that the function of the mixed airflow matches the tool condition, while avoiding excessive use of cutting fluid. Up to 90% still involves air, resulting in a significant reduction in the amount of cutting fluid used compared to pure cutting fluid.

[0067] In one possible embodiment, the sensor is an infrared temperature sensor that monitors the tool temperature in real time, and the tool temperature deviation formula is:

[0068]

[0069] In the formula, T is the real-time temperature of the cutting tool; ΔT is the tool room temperature threshold; ΔT is the tool temperature deviation; and =20℃.

[0070] Specifically, =20℃ is set as the room temperature threshold because at room temperature the tool is not cutting, no cutting fluid is needed for cooling, only air is required to flush away the chips. When the value is 0, the zero-cooling-fluid mode is triggered to avoid unnecessary consumption. hour, = This quantifies the excess heat generated by the cutting tool. A larger ΔT indicates a higher cutting load, a greater likelihood of tool overheating, and a need for more cutting fluid for cooling and lubrication. This provides a quantitative indicator for subsequent flow rate adjustments, ensuring the accuracy of the adjustment. The reason for choosing an infrared temperature sensor is that in machining scenarios, the cutting tool operates in a harsh environment with high-speed rotation and flying chips. Infrared sensors enable non-contact monitoring, avoiding wear and interference caused by direct contact with the tool, while also responding quickly to temperature changes. The infrared sensor's monitoring accuracy covers the range from room temperature to high cutting temperatures, and its fast response speed allows for real-time capture of ΔT changes, preventing tool overheating due to adjustment lag.

[0071] In one possible embodiment, the formula for controlling the cutting fluid flow rate and valve opening is:

[0072]

[0073]

[0074] In the formula, k is a preset proportionality coefficient. The cutting fluid flow rate; ΔT represents the maximum cutting fluid flow rate; ΔT represents the tool temperature deviation. This is the temperature deviation threshold when the cutting fluid flow rate reaches its maximum value; This refers to the opening degree of the cutting fluid valve; This represents the maximum opening degree of the cutting fluid valve.

[0075] Specifically, Time (tool room temperature) =0, corresponding to valve closure, only air injection, focusing on chip removal, solving the waste problem of existing technology that still supplies fluid when there is no cutting; hour, = The flow rate is linearly and positively correlated with the temperature deviation. The larger the ΔT, the more heat is generated during cutting, and the more cutting fluid is required. k is a proportionality coefficient to ensure the adaptability of the flow rate adjustment. hour, = This helps prevent tool wear and damage caused by excessive tool temperature, provides ultimate protection, and avoids excessive use of cutting fluid. This converts flow demand into the mechanical opening of the valve. Corresponding maximum flow This ensures that valve action is linearly matched with flow demand, avoids flow fluctuations, and improves system stability.

[0076] In one possible embodiment, the nozzle employs an intermittent injection method, and the formula for the intermittent injection time parameter is:

[0077]

[0078]

[0079] In the formula, D is the jet duty cycle; This refers to the injection cycle; The duration of a single spray from a single nozzle; This refers to the single stop time for a single nozzle.

[0080] Specifically, the duty cycle D=50% ensures sufficient spray time (3s) for the nozzle to flush the chips and cool the tool, while also allowing a stop time (3s). After the chips detach from the tool under the spray force, stopping the spray avoids chip adhesion and reversal caused by continuous impact from the mixed airflow, and also reduces the consumption of cutting fluid and compressed air; spray cycle The cycle time is designed to match the frequency of chip generation in machining. A cycle that is too short will cause frequent valve operation and increased wear, while a cycle that is too long will lead to chip accumulation. A 6-second cycle represents a balance between timely cleaning and equipment wear; the time parameter is fixed. =3s, D=50%, to provide a unified time for subsequent dual-nozzle staggered spraying, ensuring that the two sets of nozzles operate identically.

[0081] In one possible embodiment, the spraying times of the two sets of nozzles are staggered, assuming the spraying state of nozzle 1 is as follows: The spray state of nozzle 2 is The state function for the dual-nozzle staggered injection is:

[0082]

[0083]

[0084] In the formula, n = 0, 1, 2, ...; t is the real-time variable.

[0085] Specifically, nozzle 1 sprays for the first 3 seconds of each cycle (6s) (S1=1), and nozzle 2 sprays for the last 3 seconds (S2=1), forming a seamless connection. This avoids cleaning gaps during the intermittent periods of a single nozzle, ensuring that the tool is always within the effective scouring / cooling range. The two sets of nozzles spray from different angles. If they spray simultaneously, the two airflows will interfere with each other, forming vortices and reducing scouring force and cooling efficiency. The staggered spraying allows the two airflows to act independently without affecting each other, while covering different areas of the tool, such as the sides and front and back of the cutting edge, improving the overall cleaning and cooling effect. n is a non-negative integer, ensuring that the spraying state is repeated in multiple cycles, adapting to the continuous needs of continuous cutting processes and maintaining the stability of the system operation.

[0086] In one possible embodiment, the formula for tool thermal balance and heat dissipation rate is:

[0087]

[0088]

[0089] In the formula, The heat generation rate of the cutting tool during the cutting process. C is the heat dissipation rate carried away by the mixed airflow, and C is the specific heat capacity of the cutting tool. The mass of the cutting tool participating in heat exchange; denoted as , where A is the convective heat transfer coefficient between the gas-liquid mixture and the cutting tool; A is the heat transfer area between the cutting tool and the gas-liquid mixture; and T is the real-time temperature of the cutting tool. The temperature of the mixed airflow;

[0090] The convective heat transfer formula is:

[0091]

[0092] In the formula, The heat transfer coefficient is for pure air. This is the proportionality coefficient; The proportion of the cutting fluid volume in the mixed airflow.

[0093] Specifically, the rate of change of tool temperature is determined by the difference between the heat generation rate and the heat dissipation rate. When the heat generation rate is greater than the heat dissipation rate, the temperature rises; when the heat generation rate is less than the heat dissipation rate, the temperature falls. The heat capacity of the cutting tool ensures the feasibility of quantitative calculation of the equations; the heat dissipation rate is positively correlated with the heat transfer coefficient, heat transfer area, and temperature difference; the A of the mist-like mixed airflow is much larger than that of the columnar liquid flow (dispersed droplets, large contact area). It is the temperature difference between the cutting tool and the mixed airflow. The mixed airflow has a lower temperature, which ensures the power for heat dissipation.

[0094] The convective heat transfer coefficient explains the proportion of cutting fluid. Mechanism of action, The larger the value of h, the higher the proportion of cutting fluid. The larger h is, the greater the thermal conductivity of cutting fluid compared to pure air (h0). The mist-like droplets further enhance heat exchange efficiency, thus… The larger the size, the stronger the heat dissipation effect.

[0095] In one possible embodiment, the inner wall of the main nozzle of the nozzle is provided with a coolant nozzle, the diameter of which is smaller than that of the main nozzle, and the angle between the coolant nozzle and the airflow direction is 30°.

[0096] Specifically, the high-speed flow of compressed air inside the main nozzle creates a negative pressure zone. The small-diameter coolant nozzle allows the cutting fluid to be drawn in as a fine stream, avoiding excessive cutting fluid and uneven mixing caused by a large-diameter nozzle. The coolant stream forms a 30° angle with the compressed air flow, rather than along the airflow direction (0°) or perpendicular to the direction (90°). The 30° angle allows the compressed air to generate sufficient shear force on the coolant stream (breaking it into tiny droplets), while avoiding droplet rebound (unable to be sprayed with the airflow) caused by an excessively large angle. This ensures the stability and uniformity of the mist-like mixed airflow, improving the cooling and flushing effects.

[0097] In one possible embodiment, the two sets of nozzles are arranged at a 45° angle to the horizontal direction and at a 90° angle to the tool axis direction.

[0098] Specifically, during the cutting process, chips are usually discharged along the tangential direction of the cutting edge of the tool. A 45° angle spray can create a reverse flush (forming an angle with the chip discharge direction), improving chip removal efficiency. At the same time, the 45° angle allows the mist-like airflow to cover the cutting edge surface of the tool (the main heat-generating area), ensuring targeted cooling and lubrication. Two sets of nozzles cover the radial sides of the tool (such as the front and back or left and right sides of the cutting edge), avoiding blind spots in cooling / cleaning caused by single-angle spraying.

[0099] In one application of the present invention, Figure 4 Centered on the machine tool cutting tool, two identical hydraulic-gas supply and spraying assemblies are symmetrically arranged on both sides, forming a bidirectional cooling and chip removal system for the tool. Compressed air inlet channels and water-based cutting fluid inlet channels are respectively located on the left and right sides. The compressed air channels are equipped with compressed air control valves 1 and 2, while the water-based cutting fluid channels are equipped with cutting fluid control valves 1 and 2. All control valves are regulated by a controller to adjust the output flow rates of compressed air and water-based cutting fluid. Two sets of nozzles are connected to their respective hydraulic-gas channels. The inner wall of the main nozzle orifice has a small-diameter coolant nozzle at a 30° angle to the airflow direction. During operation, compressed air flows at high speed within the main nozzle channel, and the water-based cutting fluid flows out from the coolant nozzle and is dispersed by the high-speed airflow, forming a mist-like mixed airflow. This mist is then directionally sprayed onto both sides of the tool in the form of water-air mixed airflow L and water-air mixed airflow R, respectively. Two sets of nozzles are arranged at a 45° angle to the horizontal and a 90° angle to the tool axis, and operate in an intermittent staggered mode (spray time 3 seconds, duty cycle 50%). Airflow L and airflow R are sprayed alternately, which can cover the cutting area of ​​the tool without dead angles. The tool is cooled and lubricated by the mist airflow, and the chips are washed away by the impact force of the airflow. At the same time, the air-liquid flow rate is adjusted by the control valve so that the proportion of cutting fluid in the mixed airflow is adapted to the tool temperature change within the range of 10%-90%, which meets the needs of different machining conditions.

[0100] The application scenarios of this invention are as follows:

[0101] Cooling and chip removal for conventional metal turning, milling, drilling and grinding: Deployed in conventional metal processing scenarios of general machinery manufacturing enterprises and parts processing plants, it utilizes gas-liquid mixed mist airflow, temperature feedback to dynamically control the cutting fluid flow rate and a 10%-90% adjustable mechanism to provide cooling, lubrication and chip removal with low cutting fluid consumption for small and medium load batch cutting (carbon steel / aluminum alloy, etc.), adapting to diverse needs such as processing cost control, environmental protection and emission reduction, and maintenance of conventional processing efficiency.

[0102] Thread / tapping chip cleaning and cooling: Deployed in thread / tapping scenarios in fastener production and mechanical fastener processing, it utilizes a dual-nozzle arrangement at 45° and 90° angles and an intermittent spraying mechanism (3-second spray / 50% duty cycle) to provide precise flushing and cooling for chip removal from thread grooves and lubrication of tap edges, adapting to diverse needs such as preventing tool jamming, ensuring part thread accuracy, and low cutting fluid consumption.

[0103] Cooling and chip removal for cutting difficult-to-machine materials (high-temperature alloys / stainless steel, etc.): Deployed in the machining of difficult-to-machine materials such as aerospace parts and mold cavities, it utilizes dynamic temperature to increase the proportion of cutting fluid and high-pressure mist airflow for efficient heat dissipation, providing stable cooling and chip removal for high-temperature and high-adhesion cutting, and meeting diverse needs such as extended tool life, guaranteed machining accuracy, and environmental protection and low consumption.

[0104] Precision component (aerospace / medical / electronic) cutting cooling protection: Deployed in the machining of precision structural parts for aerospace, medical devices, and electronic equipment, it utilizes real-time infrared temperature monitoring and a mist-like airflow and gentle chip removal mechanism to provide tool constant temperature and anti-deformation protection and part surface anti-scratch protection for high-precision machining, adapting to the diverse needs of micron-level machining accuracy, surface quality assurance, low residue and environmental protection.

[0105] Example 2

[0106] See Figure 4 and Figure 5 The present invention also provides a liquid-gas mixing chip cooling system for metal cutting machine tools, employing the method described in any of the above-mentioned embodiments, comprising:

[0107] Monitoring and transmission unit 100: used to monitor the temperature signal of the machine tool cutting tool in real time through a sensor, and transmit the temperature signal to the controller;

[0108] Receiver and regulator unit 200: Used for the controller to receive the temperature signal and adjust the output flow rate of compressed air and the output flow rate of cutting fluid according to preset control logic;

[0109] Mixing injection unit 300: used to mix the compressed air and cutting fluid in the nozzle to form a mist-like mixed airflow, and the nozzle sprays the mixed airflow onto the tool according to the instructions of the controller.

[0110] It should be noted that the information interaction and execution process between the modules of the above-mentioned device are based on the same concept as the method embodiment in Embodiment 1 of this application, and the resulting technical effects are the same as those in the method embodiment of this application. For details, please refer to the description in the method embodiment shown above in this application, and it will not be repeated here.

[0111] Example 3

[0112] Embodiment 3 of the present invention provides a non-transitory computer-readable storage medium storing program code for a liquid-gas mixing chip removal and cooling method for a metal cutting machine tool. The program code includes instructions for executing the liquid-gas mixing chip removal and cooling method for a metal cutting machine tool according to Embodiment 1 or any possible implementation thereof.

[0113] Computer-readable storage media can be any available medium that a computer can access, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

[0114] Example 4

[0115] Embodiment 4 of the present invention provides an electronic device, including: a memory and a processor;

[0116] The processor and the memory communicate with each other via a bus; the memory stores program instructions that can be executed by the processor, and the processor can execute the liquid-gas mixing chip cooling method for metal cutting machine tools according to Embodiment 1 or any possible implementation thereof by calling the program instructions.

[0117] Specifically, a processor can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, an integrated circuit, etc. When implemented in software, the processor can be a general-purpose processor that reads software code stored in memory. This memory can be integrated into the processor or located outside the processor and exist independently.

[0118] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable system. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0119] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing systems. They can be centralized on a single computing system or distributed across a network of multiple computing systems. Optionally, they can be implemented using program code executable by a computing system, thereby storing them in a storage system for execution by the computing system. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0120] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A method for cooling metal cutting machine tools by mixing liquid and gas to remove chips, characterized in that, Includes the following steps: S1. Monitor the temperature signal of the machine tool cutting tool in real time through a sensor, and transmit the temperature signal to the controller; S2. The controller receives the temperature signal and adjusts the output flow rate of compressed air and the output flow rate of cutting fluid according to preset control logic. S3. The compressed air and the cutting fluid are mixed in the nozzle to form a mist-like mixed airflow, and the nozzle sprays the mixed airflow onto the tool according to the instructions of the controller.

2. The cooling method for liquid-gas mixing and chip removal in a metal cutting machine tool according to claim 1, characterized in that, The proportion of the cutting fluid in the mixed airflow is calculated using the following formula: ， In the formula, The volume ratio of the cutting fluid in the mixed airflow; This refers to the cutting fluid flow rate. For compressed air flow, and The value range is 10% to 90%.

3. The liquid-gas mixing and chip removal cooling method for metal cutting machine tools according to claim 1, characterized in that, The sensor is an infrared temperature sensor that monitors the tool temperature in real time. The formula for the tool temperature deviation is: ， In the formula, T is the real-time temperature of the cutting tool; ΔT is the tool room temperature threshold; ΔT is the tool temperature deviation; and =20℃.

4. The liquid-gas mixing and chip removal cooling method for metal cutting machine tools according to claim 1, characterized in that, The formula for controlling the cutting fluid flow rate and valve opening is: ， ， In the formula, k is a preset proportionality coefficient. The cutting fluid flow rate; This is the maximum cutting fluid flow rate; ΔT represents the tool temperature deviation; This is the temperature deviation threshold when the cutting fluid flow rate reaches its maximum value; This refers to the opening degree of the cutting fluid valve; This represents the maximum opening degree of the cutting fluid valve.

5. The liquid-gas mixing and chip removal cooling method for metal cutting machine tools according to claim 1, characterized in that, The nozzle employs an intermittent injection method, and the formula for the intermittent injection time parameter is as follows: ， ， In the formula, D is the jet duty cycle; This refers to the injection cycle; The duration of a single spray from a single nozzle; This refers to the single stop time for a single nozzle.

6. The liquid-gas mixing and chip removal cooling method for metal cutting machine tools according to claim 5, characterized in that, The spraying times of the two sets of nozzles are staggered. Let the spraying state of nozzle 1 be... The spray state of nozzle 2 is The state function for the dual-nozzle staggered injection is: ， ， In the formula, n = 0, 1, 2, ...; t is the real-time variable.

7. The liquid-gas mixing and chip removal cooling method for metal cutting machine tools according to claim 1, characterized in that, The formulas for tool thermal balance and heat dissipation rate are: ， ， In the formula, The heat generation rate of the cutting tool during the cutting process. C is the heat dissipation rate carried away by the mixed airflow, and C is the specific heat capacity of the cutting tool. The mass of the cutting tool participating in heat exchange; denoted as , where A is the convective heat transfer coefficient between the gas-liquid mixture and the cutting tool; A is the heat transfer area between the cutting tool and the gas-liquid mixture; and T is the real-time temperature of the cutting tool. The temperature of the mixed airflow; The convective heat transfer formula is: ， In the formula, The heat transfer coefficient is for pure air. This is the proportionality coefficient; The proportion of the cutting fluid volume in the mixed airflow.

8. The liquid-gas mixing and chip removal cooling method for metal cutting machine tools according to claim 1, characterized in that, The inner wall of the main nozzle of the nozzle is provided with a coolant nozzle, the diameter of which is smaller than that of the main nozzle, and the angle between the coolant nozzle and the airflow direction is 30°.

9. The liquid-gas mixing and chip removal cooling method for metal cutting machine tools according to claim 6, characterized in that, The two sets of nozzles are arranged at a 45° angle to the horizontal direction, and at a 90° angle to the tool axis direction.

10. A liquid-gas mixing chip removal cooling system for a metal cutting machine tool, employing the liquid-gas mixing chip removal cooling method for a metal cutting machine tool as described in any one of claims 1-9, characterized in that, include: Monitoring and transmission unit: used to monitor the temperature signal of the machine tool cutting tool in real time through sensors and transmit the temperature signal to the controller; The receiving and regulating unit is used by the controller to receive the temperature signal and adjust the output flow rate of compressed air and the output flow rate of cutting fluid according to preset control logic. Mixed injection unit: used to mix the compressed air and cutting fluid in the nozzle to form a mist-like mixed airflow, and the nozzle sprays the mixed airflow onto the tool according to the instructions of the controller.

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