Machining large flow liquid distribution system and control strategy

Abstract

This invention provides a high-flow-rate cutting fluid dispensing system and control strategy for machining, belonging to the field of cutting fluid recycling technology. It includes a separation mechanism, an aluminum chip treatment mechanism, a cutting fluid treatment mechanism, and a return fluid treatment mechanism. The high-flow-rate cutting fluid dispensing system provided by this invention integrates multiple processes such as aluminum chip treatment, cutting fluid treatment, and fluid dispensing and supply into a complete system through a combined structure of the separation mechanism, aluminum chip treatment mechanism, cutting fluid treatment mechanism, and return fluid treatment mechanism. This solves the problems of cumbersome manual maintenance and high costs caused by the independent configuration of traditional machining cutting fluid equipment.

Description

Technical Field

[0001] This invention belongs to the field of cutting fluid recycling technology, and more specifically, it relates to a high-flow-rate fluid distribution system and control strategy for machining. Background Technology

[0002] During machining, cutting fluid is required for cooling and flushing away aluminum chips. Currently, a fluid supply tank and a chip conveyor are used for fluid supply and chip removal. Each machine tool needs to be equipped with one fluid supply tank and one chip conveyor, and a dedicated person is required to inspect, prepare, and empty the aluminum chips. In addition, aluminum chips easily accumulate inside the fluid tank, which reduces its capacity and results in insufficient fluid spraying, leading to problems such as aluminum sticking to the processed material. The fluid tank needs to be cleaned manually every month, which puts a lot of pressure on the workers. Furthermore, the spin-drying fluid after aluminum chip treatment needs to be stored and treated separately, which adds to the cost pressure. Summary of the Invention

[0003] The purpose of this invention is to provide a high-flow-rate fluid dispensing system for machining, which aims to solve the problems of existing machining cutting fluid equipment being independently configured, requiring cumbersome manual operation and maintenance, and incurring high costs.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a machining high-flow-rate liquid dispensing system, comprising:

[0005] Separation mechanism, aluminum chip handling mechanism, cutting fluid handling mechanism, and reflux fluid handling mechanism;

[0006] The separation mechanism includes a return pipeline and a settling scraper arranged in sequence. The return pipeline receives the mixed cutting fluid containing aluminum chips and transmits it to the settling scraper. The settling scraper is used to separate the aluminum chips in the mixed cutting fluid to obtain primary cutting fluid.

[0007] The aluminum chip processing mechanism includes a vibrating conveyor, a spin dryer, and an aluminum chip collection unit arranged in sequence. The vibrating conveyor is used to receive aluminum chips separated from the settling scraper and transport them to the spin dryer. The spin dryer removes residual cutting fluid adhering to the aluminum chips by spin drying. The aluminum chip collection unit is used to collect the aluminum chips after spin drying.

[0008] The cutting fluid treatment mechanism includes an oil-water separator tank, which is equipped with an oil removal device. The oil-water separator tank receives primary cutting fluid and residual cutting fluid after separation by a settling scraper, and obtains secondary cutting fluid after passing through the oil removal device.

[0009] The reflux fluid treatment mechanism includes a cutting fluid reservoir, a treatment system disposed within the cutting fluid reservoir, and multiple liquid distribution pipelines connected to the cutting fluid reservoir. The cutting fluid reservoir is used to receive secondary cutting fluid and, after being oxygenated and sterilized by the treatment system, forms recycled cutting fluid, which is then distributed to the multiple liquid distribution pipelines. Each liquid distribution pipeline is equipped with a liquid distribution pump, and the frequency of the liquid distribution pump is adjusted to distribute the recycled cutting fluid in the liquid distribution pipeline to the corresponding machine tool.

[0010] In one possible implementation, a vacuum paper belt filter is provided between the settling scraper and the oil-water separator;

[0011] The primary cutting fluid enters the vacuum paper belt filter through the overflow pipe, and after being filtered by the filter paper of the vacuum paper belt filter under the action of gravity and negative pressure, it enters the oil-water separator.

[0012] In one possible implementation, the vacuum paper tape filter is connected to a scraper drainer, which is used to scrape off the filtered filter paper along with aluminum shavings on the filter paper and collect them into a slag car and waste paper winding device.

[0013] In one possible implementation, the oil removal equipment includes an oil remover and a separation tank. The oil remover is located at the inlet end of the oil-water separator and is used to separate primary cutting fluid and residual cutting fluid into oil and secondary cutting fluid. The separation tank is connected to the oil remover and is used to receive the separated oil.

[0014] In one possible implementation, the cutting fluid reservoir is connected to multiple supply lines, the multiple supply lines are connected to a common manifold, and the multiple distribution lines are respectively connected to the return line.

[0015] Pressure detection units are installed on both the liquid supply line and the return line.

[0016] In one possible implementation, the liquid preparation pipeline is connected to a mixing pipeline, which switches between a raw liquid replenishment unit and a water replenishment unit. The raw liquid replenishment unit is filled with cutting fluid stock solution, and the water replenishment unit is filled with water.

[0017] The original fluid is replenished to the recycled cutting fluid by switching between the mixing pipeline and the original fluid replenishment unit or the liquid dispensing pipeline; or the water replenishment unit and the liquid dispensing pipeline are switched between the mixing pipeline and the original fluid replenishment unit to replenish the recycled cutting fluid with water.

[0018] In one possible implementation, the cutting fluid container is equipped with a centrifugal device to centrifuge and rotate the secondary cutting fluid in the container to further separate residual aluminum shavings from the secondary cutting fluid and increase the reaction rate of the secondary cutting fluid as it passes through the treatment system for oxygenation and sterilization.

[0019] In one possible implementation, the processing system includes a compressed air oxygenation module, an ejector-type dissolved air oxygenation module, and an ultraviolet sterilization module. The compressed air oxygenation module and the ejector-type dissolved air oxygenation module are connected in parallel and switch operating modes in real time according to the dissolved oxygen concentration in the cutting fluid container. When the dissolved oxygen concentration is lower than the preset lower limit, the compressed air oxygenation module and the ejector-type dissolved air oxygenation module start synchronously. The ultraviolet sterilization module is linked to the cutting fluid flow rate and adapts the ultraviolet power according to the cutting fluid flow rate.

[0020] The beneficial effects of the high-flow-rate liquid mixing system for machining provided by the present invention are as follows: Compared with the prior art, the separation mechanism includes a return pipeline and a settling scraper. The return pipeline can centrally receive the mixed cutting fluid discharged from all machining tools, eliminating the need to lay a separate return and filtration device for each machine tool. The settling scraper can automatically separate a large amount of aluminum chips from the mixed cutting fluid, eliminating the need for manual removal of aluminum chips and reducing the intensity of manual operation and maintenance.

[0021] The aluminum chip processing unit, linked to the separation mechanism, includes a vibrating conveyor, a spin dryer, and an aluminum chip collection unit. This achieves full automation of the aluminum chip separation, conveying, dehydration, and collection process, eliminating the need for manual transfer of wet aluminum chips, manual dehydration, and dispersed collection. It replaces the manual coordination required in each stage of aluminum chip processing in traditional independent equipment, reducing labor input. The spin dryer removes residual cutting fluid from the aluminum chips, improving the purity of the recycled aluminum chips, increasing recycling revenue, and enabling secondary recovery of residual cutting fluid, thus avoiding waste.

[0022] The cutting fluid treatment unit includes an oil-water separator and an oil removal device. It can centrally receive the primary cutting fluid discharged from the aluminum chip treatment unit and the residual cutting fluid recovered by the aluminum chip treatment unit, realizing centralized oil removal treatment of the cutting fluid. It eliminates the need to configure multiple oil removal devices for cutting fluids from different sources, reducing equipment investment costs. It also eliminates the need for manual oil removal and monitoring of oil stratification, reducing the tediousness of manual operation and maintenance and human error.

[0023] The reflux fluid treatment system includes a cutting fluid reservoir, a treatment system, multiple dispensing pipelines, and a dispensing pump. It achieves centralized storage, purification, reuse, and dispensing of cutting fluid. The reservoir centrally stores treated secondary cutting fluid, eliminating the need for separate storage tanks for each machine tool, thus reducing space requirements and configuration costs. The treatment system automatically oxygenates and sterilizes the cutting fluid, eliminating the need for manual periodic addition of sterilizing agents and monitoring of fluid deterioration, reducing manual maintenance costs. Multiple dispensing pipelines can simultaneously distribute reused cutting fluid to multiple machine tools. Combined with the frequency adjustment function of the dispensing pump, this system can supply fluid to multiple machine tools, replacing the traditional model of separate dispensing equipment for each machine tool. This significantly reduces the number of devices required, eliminates the need for manual adjustment of the supply flow rate, adapts to different machine tool load requirements, and further reduces the complexity of manual maintenance.

[0024] In summary, this liquid preparation system integrates multiple processes such as aluminum chip treatment, cutting fluid treatment, and liquid preparation and supply into a complete system through a combination of separation mechanism, aluminum chip treatment mechanism, cutting fluid treatment mechanism, and return fluid treatment mechanism. This solves the problems of cumbersome manual operation and maintenance and high cost caused by the independent configuration of traditional machining cutting fluid equipment.

[0025] This invention also provides a control strategy for high-flow-rate liquid preparation in machining, based on the aforementioned high-flow-rate liquid preparation system for machining, comprising the following steps:

[0026] S1: Current sensors are installed at the spindle motors of each machine tool on multiple machining lines, and the load current data of each motor is collected in real time through the control cabinet;

[0027] S2: The control cabinet analyzes the collected current data.

[0028] When the current of any motor is higher than its rated value for 3 consecutive seconds, the machine tool is determined to be in a high-load processing state, and the high-load response mode of the liquid dispensing system is triggered synchronously.

[0029] When the current of any motor is lower than its rated value for 5 consecutive seconds, the machine tool is determined to be in a low-load processing state, and the low-load response mode of the liquid dispensing system is triggered synchronously.

[0030] S3: In high load response mode, control the liquid dispensing pump of the corresponding liquid dispensing pipeline to increase the operating frequency; in low load response mode, control the liquid dispensing pump of the corresponding liquid dispensing pipeline to decrease the operating frequency.

[0031] In one possible implementation, the control cabinet collects real-time data on the particle size distribution and oil content of impurities in the reflux liquid, and sets three-level processing priority thresholds based on the collected data.

[0032] First priority: For particles with a diameter ≥50μm or an oil content ≥5%, the control cabinet will prioritize starting the centrifugal equipment and treatment system in the cutting fluid container of the reflux fluid treatment mechanism, and link the settling scraper to enhance separation, forming a multi-stage purification loop; if the machine tool is in a high load response mode at this time, the fluid supply to at least 3 non-critical machining machines will be suspended; if the machine tool is in a low load response mode at this time, priority will be given to ensuring that the reflux fluid undergoes full-process purification treatment through the settling scraper, vacuum paper belt filter and oil-water separator.

[0033] Secondary priority: For particles with a diameter of 20μm ≤ 50μm or an oil content of 2% ≤ 5%, start the oil removal equipment of the vacuum paper belt filter and the oil-water separator; if the machine tool is in high load response mode at this time, control the operating frequency of the liquid dispensing pump in the corresponding liquid dispensing pipeline to increase by 15% to 20%; if the machine tool is in low load response mode at this time, control the operating frequency of the liquid dispensing pump in the corresponding liquid dispensing pipeline to decrease by 10% to 15%;

[0034] Level 3 priority: If the particle size is <20μm and the oil content is <2%, only the filter module of the vacuum paper tape filter will be activated; if the machine tool is in high load response mode at this time, the operating frequency of the liquid distribution pump in the corresponding liquid distribution pipeline will be increased by 15% to 20%; if the machine tool is in low load response mode at this time, the operating frequency of the liquid distribution pump in all liquid distribution pipelines will be reduced by 10% to 15%.

[0035] The beneficial effects of the high-flow-rate fluid dispensing system for machining provided by this invention are as follows: Compared with the prior art, by installing a current sensor at the machine tool spindle motor, real-time monitoring and judgment of the machine tool load status are achieved, providing a basis for fluid dispensing flow rate adjustment. The fluid dispensing response mode is automatically switched according to the machine tool load status, and the frequency of the dispensing pump is adjusted to match the fluid dispensing flow rate with the machine tool load. This not only meets the machine tool's demand for cutting fluid under different working conditions but also avoids waste of cutting fluid and electrical energy, achieving the goal of energy saving and consumption reduction. The control logic is simple, the response speed is fast, and fully automated control can be achieved, reducing manual intervention and improving the system's operating efficiency and intelligence level. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a layout diagram of a high-flow-rate liquid dispensing system for machining, provided in an embodiment of the present invention.

[0038] Figure 2 The diagram shows the layout of the liquid preparation pipeline and the mixing pipeline provided in the embodiments of the present invention;

[0039] In the diagram: 1. Return pipeline; 2. Settling scraper; 3. Vibrating conveyor; 4. Spin dryer; 5. Aluminum shavings collection unit; 6. Oil-water separator; 7. Cutting fluid container; 8. Liquid mixing pipeline; 9. Liquid mixing pump; 10. Vacuum paper tape filter; 11. Scraper drainer; 12. Oil remover; 13. Separation box; 14. Liquid supply pipeline; 15. Manifold pipeline; 16. Mixing pipeline; 17. Raw liquid replenishment unit; 18. Water replenishment unit; 19. Slag cart; 20. Waste paper winding device; 21. Processing system. Detailed Implementation

[0040] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0041] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.

[0042] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of the invention.

[0043] Please see Figure 1The high-flow-rate machining fluid dispensing system provided by this invention will now be described. The high-flow-rate machining fluid dispensing system includes a separation mechanism, an aluminum chip treatment mechanism, a cutting fluid treatment mechanism, and a reflux fluid treatment mechanism. The separation mechanism includes a reflux pipeline 1 and a settling scraper 2 arranged sequentially. The reflux pipeline 1 receives the mixed cutting fluid containing aluminum chips and transmits it to the settling scraper 2. The settling scraper 2 separates the aluminum chips from the mixed cutting fluid to obtain primary cutting fluid. The aluminum chip treatment mechanism includes a vibrating conveyor 3, a spin dryer 4, and an aluminum chip collection unit 5 arranged sequentially. The vibrating conveyor 3 receives the aluminum chips separated from the settling scraper 2 and transmits them to the spin dryer 4. The spin dryer 4 removes residual cutting fluid adhering to the aluminum chips by spin drying. The aluminum chip collection unit 5 collects the aluminum chips after spin drying. The cutting fluid treatment mechanism includes an oil-water separator 6, which is equipped with an oil removal device. The oil-water separator 6 receives primary cutting fluid and residual cutting fluid after separation by a settling scraper 2, and obtains secondary cutting fluid after passing through the oil removal device. The return fluid treatment mechanism includes a cutting fluid holding tank 7, a treatment system 21 installed in the cutting fluid holding tank 7, and multiple liquid distribution pipelines 8 connected to the cutting fluid holding tank 7. The cutting fluid holding tank 7 is used to receive secondary cutting fluid and form recycled cutting fluid after oxygenation and sterilization by the treatment system 21, which is then distributed to multiple liquid distribution pipelines 8. A liquid distribution pump 9 is installed on the liquid distribution pipelines 8, and the frequency of the liquid distribution pump 9 is adjusted to distribute the recycled cutting fluid in the liquid distribution pipelines 8 to the corresponding machine tools.

[0044] The machining high-flow-rate fluid mixing system provided by this invention, compared with the prior art, includes a separation mechanism comprising a return pipeline 1 and a settling scraper 2. The return pipeline 1 can centrally receive the mixed cutting fluid discharged from all machining tools, eliminating the need to lay a separate return and filtration device for each machine tool. The settling scraper 2 can automatically separate a large amount of aluminum chips from the mixed cutting fluid, eliminating the need for manual removal of aluminum chips and reducing the intensity of manual operation and maintenance.

[0045] The aluminum chip processing mechanism, linked to the separation unit, includes a vibrating conveyor 3, a spin dryer 4, and an aluminum chip collection unit 5. This achieves full automation of the aluminum chip separation, conveying, dehydration, and collection process, eliminating the need for manual transfer of wet aluminum chips, manual dehydration, and dispersed collection. It replaces the manual coordination required in each stage of aluminum chip processing in traditional independent equipment, reducing labor input. The spin dryer 4 removes residual cutting fluid from the aluminum chips, improving the purity of the recycled aluminum chips, increasing recycling revenue, and enabling secondary recycling of residual cutting fluid, thus avoiding waste.

[0046] The cutting fluid treatment unit includes an oil-water separator 6 and an oil removal device. It can centrally receive the primary cutting fluid discharged from the aluminum chip treatment unit and the residual cutting fluid recovered by the aluminum chip treatment unit, realizing centralized oil removal treatment of the cutting fluid. It eliminates the need to configure multiple oil removal devices for cutting fluids from different sources, reducing equipment investment costs. It also eliminates the need for manual oil removal and monitoring of oil stratification, reducing the tediousness of manual operation and maintenance and human error.

[0047] The reflux fluid treatment system includes a cutting fluid reservoir 7, a treatment system 21, multiple dispensing pipelines 8, and a dispensing pump 9. It achieves centralized storage, purification, reuse, and dispensing of cutting fluid. The cutting fluid reservoir 7 centrally stores the treated secondary cutting fluid, eliminating the need for separate cutting fluid storage tanks for each machine tool, thus reducing equipment space and configuration costs. The treatment system 21 automatically oxygenates and sterilizes the cutting fluid, eliminating the need for manual periodic addition of sterilizing agents and monitoring of cutting fluid deterioration, reducing manual maintenance costs. The multiple dispensing pipelines 8 can simultaneously distribute reused cutting fluid to multiple machine tools. Combined with the frequency adjustment function of the dispensing pump 9, this system can supply fluid to multiple machine tools, replacing the traditional model of separate dispensing equipment for each machine tool. This significantly reduces the number of equipment required, eliminates the need for manual adjustment of the supply flow rate, adapts to different machine tool load requirements, and further reduces the complexity of manual maintenance.

[0048] In summary, this liquid preparation system integrates multiple processes such as aluminum chip treatment, cutting fluid treatment, and liquid preparation and supply into a complete system through a combination of separation mechanism, aluminum chip treatment mechanism, cutting fluid treatment mechanism, and return fluid treatment mechanism. This solves the problems of cumbersome manual operation and maintenance and high cost caused by the independent configuration of traditional machining cutting fluid equipment.

[0049] In some embodiments, a vacuum paper belt filter 10 is provided between the settling scraper 2 and the oil-water separator 6; the primary cutting fluid enters the vacuum paper belt filter 10 through the overflow pipe, and enters the oil-water separator 6 after being filtered by the filter paper of the vacuum paper belt filter 10 under the action of gravity and negative pressure.

[0050] The vacuum paper belt filter 10 is fixedly installed on the bracket between the settling scraper 2 and the oil-water separator 6. Its installation height is lower than the overflow port of the settling scraper 2 and higher than the feed port of the oil-water separator 6, ensuring that the primary cutting fluid can flow into the vacuum paper belt filter 10 by gravity without the need for an additional delivery pump.

[0051] The feed inlet of the vacuum paper belt filter 10 is sealed to the overflow port of the settling scraper 2 through an overflow pipe. The overflow pipe is equipped with a flow regulating valve to regulate the inflow speed of the primary cutting fluid and prevent the inflow speed from being too fast, which would lead to incomplete filtration.

[0052] The outlet of the vacuum paper tape filter 10 is connected to the inlet of the oil-water separator 6 via a flange, ensuring that the filtered cutting fluid can flow steadily into the oil-water separator 6.

[0053] The vacuum paper belt filter 10 is internally equipped with continuous filter paper (preferably with a pore size of 20-30μm), a vacuum adsorption device, and a filter paper conveying device. The filter paper is made of non-woven fabric, which has the advantages of high filtration accuracy, strong toughness, and continuous use. After the primary cutting fluid enters the vacuum paper belt filter 10 through the overflow pipe, it first falls onto the filter paper. Under the action of gravity, the fine aluminum shavings (particle size 20-50μm) in the cutting fluid are intercepted by the filter paper. The cutting fluid after preliminary filtration quickly passes through the filter paper under the negative pressure generated by the vacuum adsorption device and enters the bottom liquid collection chamber of the vacuum paper belt filter 10. Then, it flows into the oil-water separator 6 through the discharge port. The filter paper conveying device can deliver new filter paper in real time according to the degree of contamination of the filter paper to ensure stable filtration effect.

[0054] Preferably, the bottom of the vacuum paper belt filter 10 is provided with a liquid collection tank, which is connected to the inlet of the oil-water separator 6 to collect the cutting fluid passing through the filter paper and prevent cutting fluid leakage; the negative pressure of the vacuum adsorption device is adjustable (adjustment range is -0.02 to -0.05 MPa), which can be flexibly adjusted according to the turbidity of the primary cutting fluid, so as to ensure filtration efficiency and prevent the filter paper from being damaged due to excessive negative pressure.

[0055] By adding a vacuum paper tape filter 10, the primary cutting fluid is filtered a second time, effectively removing fine aluminum shavings particles remaining in the primary cutting fluid. This prevents fine aluminum shavings from entering the oil-water separator 6, thus preventing blockage of the oil removal equipment and improving the effect of subsequent cutting fluid treatment. Filtration is achieved using both gravity and negative pressure, eliminating the need for additional power and reducing energy consumption.

[0056] In some embodiments, the vacuum paper tape filter 10 is connected to a scraper drainer 11, which scrapes off the filtered filter paper along with aluminum shavings on the filter paper and collects them into the slag car 19 and the waste paper winding device 20.

[0057] The scraper discharge machine 11 is fixedly installed on one side of the vacuum paper belt filter 10. Its installation height is adapted to the filter paper output end of the vacuum paper belt filter 10. The scraper discharge machine 11 includes a drive motor, a chain transmission mechanism and a scraper. The drive motor is fixedly installed on the top of the scraper discharge machine 11 and drives the scraper to make a cyclical movement through the chain transmission mechanism. The scraper is made of wear-resistant rubber material. The bottom of the scraper is in close contact with the surface of the filter paper of the vacuum paper belt filter 10 to ensure that the trapped material (including fine aluminum shavings and impurities) on the filter paper can be thoroughly scraped off.

[0058] Below the scraper discharge machine 11, there are slag carts 19 and waste paper winding devices 20. The slag cart 19 is located directly below the scraper discharge machine 11 and is used to receive filter paper scraps mixed with aluminum shavings scraped off by the scraper. The waste paper winding device 20 is located on one side of the slag cart 19 and is connected to the filter paper output end of the vacuum paper belt filter 10. It is used to wind up the used, unbroken, complete filter paper. The wound waste paper filter paper can be centrally recycled and processed to avoid environmental pollution.

[0059] Preferably, the scraper speed of the scraper discharge machine 11 is synchronized with the filter paper conveying speed of the vacuum paper belt filter 10 (adjustable range is 0.1-0.3m / min) to ensure that the trapped material on the surface of the filter paper can be scraped off in time and thoroughly without affecting the filtration effect; the scraper discharge machine 11 is equipped with a limit switch. When the slag car 19 is full, the limit switch triggers an alarm signal to remind the staff to clean the slag car 19 in time to avoid the trapped material from overflowing.

[0060] By setting up the scraper drainer 11, the filter paper and aluminum shavings on the filter paper are automatically cleaned, eliminating the need for manual cleaning, reducing labor intensity and improving system efficiency. The filter paper fragments and whole waste paper are collected separately, which facilitates the secondary recycling of aluminum shavings (separating fine aluminum shavings from the filter paper fragments) and reduces solid waste pollution, which is in line with the concept of green production.

[0061] In some embodiments, the degreasing device includes a degreasing machine 12 and a separation tank 13. The degreasing machine 12 is located at the inlet end of the oil-water separator 6 and is used to separate primary cutting fluid and residual cutting fluid into oil and secondary cutting fluid. The separation tank 13 is connected to the degreasing machine 12 and is used to receive the separated oil.

[0062] The oil removal equipment includes an oil remover 12 and a separation tank 13, which are connected in series by pipelines and integrated on the oil-water separation tank 6. The oil remover 12 is fixedly installed on the top of the oil-water separation tank 6, and its inlet end is connected to the inside of the oil-water separation tank 6 through a pipeline. The height of the inlet end is located in the middle of the liquid level of the oil-water separation tank 6 (corresponding to the interface between the floating oil layer and the cutting fluid layer), which facilitates the accurate extraction of floating oil and emulsified oil. The oil remover 12 adopts an oil scraping type oil removal structure, which is equipped with an oil scraper and an oil collection tank inside. The oil scraper is made of corrosion-resistant rubber material and is driven by a motor to rotate. The edge of the oil scraper is in close contact with the floating oil layer in the oil-water separation tank 6, scraping the floating oil and emulsified oil into the oil collection tank.

[0063] The separator 13 is fixedly installed on one side of the degreasing machine 12. The volume of the separator 13 is 0.5-1m³. Its inlet is connected to the oil collection tank of the degreasing machine 12 through a pipeline to receive the oil (including floating oil and emulsified oil) scraped off by the degreasing machine 12. The separator 13 is equipped with a heating device and a settling plate. The heating temperature of the heating device is adjustable (adjustment range is 40-60℃). Heating can destroy the emulsion structure in the oil, so that the oil and a small amount of residual cutting fluid can be further separated. The settling plate divides the interior of the separator 13 into multiple stratified chambers, prolonging the settling time of the oil (settling time is 60-90min) to ensure that the oil and cutting fluid are completely separated.

[0064] The bottom of the separator 13 is equipped with a return port, which is connected to the inlet of the oil-water separator 6 through a pipeline. This is used to return a small amount of cutting fluid at the bottom after separation to the oil-water separator 6 for further oil removal. The top of the separator 13 is equipped with an oil drain port, which is equipped with a control valve. When the oil level in the separator 13 reaches the preset level, the control valve is opened to discharge the separated pure oil, which can be collected and reused.

[0065] The oil removal equipment is further subdivided into an oil remover 12 and a separation tank 13, achieving both scraping and secondary separation of the oil. This improves the oil removal effect of the cutting fluid, ensures that the oil content of the secondary cutting fluid meets the standards, and avoids oil residue affecting the quality of subsequent cutting fluid reuse. The separated oil can be recycled and reused, reducing resource waste and environmental pollution.

[0066] In some embodiments, the cutting fluid reservoir 7 is connected to multiple fluid supply lines 14, the multiple fluid supply lines 14 are connected to a common manifold 15, and multiple fluid distribution lines 8 are respectively connected to the return line 1; pressure detection units are provided on both the fluid supply lines 14 and the return line 1.

[0067] The outlet of the cutting fluid reservoir 7 is connected to multiple supply lines 14. The number of supply lines 14 is the same as the number of distribution lines 8. The input end of each supply line 14 is sealed to the outlet of the cutting fluid reservoir 7, and the output ends are connected to a manifold 15. The manifold 15 is made of the same material as the supply lines 14 (both are made of stainless steel). The inner diameter of the manifold 15 is larger than the inner diameter of the supply lines 14 to ensure that the cutting fluid from the multiple supply lines 14 can flow smoothly without blockage or pressure loss.

[0068] The input ends of multiple liquid distribution pipelines 8 are all sealed to the manifold 15, and the output ends are respectively connected to the cutting fluid inlets of each machine tool. A shut-off valve is installed at the connection between the liquid distribution pipeline 8 and the manifold 15, which can control the opening and closing of a single liquid distribution pipeline 8. This makes it easy to close the corresponding liquid distribution pipeline 8 during machine tool maintenance without affecting the normal operation of other machine tools. The output ends of multiple liquid distribution pipelines 8 are respectively connected to the return pipeline 1 to form a closed loop, ensuring that the unused recycled cutting fluid or the mixed cutting fluid after use can be smoothly returned to the return pipeline 1 and enter the separation mechanism for further processing.

[0069] Pressure detection units are fixedly installed on both the supply line 14 and the return line 1. These pressure detection units are preferably pressure transmitters, which are electrically connected to the control cabinet. They collect pressure data from the supply line 14 and the return line 1 in real time and transmit the data to the display screen on the control cabinet, facilitating real-time monitoring of pressure changes by operators. The pressure transmitter on the supply line 14 is located in the middle of the supply line 14 and is used to monitor the supply pressure (preset pressure range: 0.3-0.5 MPa). The pressure transmitter on the return line 1 is located at the input end of the return line 1 and is used to monitor the return pressure (preset pressure range: 0.1-0.2 MPa).

[0070] When the pressure detection unit detects that the pipeline pressure exceeds the preset range, the control cabinet automatically triggers an alarm signal to remind the staff to troubleshoot the fault in time (such as pipeline blockage, leakage, etc.). At the same time, it can also adjust the frequency of the liquid dispensing pump 9 and adjust the pipeline flow to restore the pressure to the preset range.

[0071] In some embodiments, please refer to Figure 1 and Figure 2 The liquid preparation line 8 is connected to the liquid mixing line 16, which switches between the original liquid replenishment unit 17 and the water replenishment unit 18. The original liquid replenishment unit 17 is filled with cutting fluid concentrate, and the water replenishment unit 18 is filled with water. The original liquid replenishment unit 17 or the liquid preparation line 8 can be switched through the liquid mixing line 16 to replenish the recycled cutting fluid with concentrate; or the water replenishment unit 18 and the liquid preparation line 8 can be switched through the liquid mixing line 16 to replenish the recycled cutting fluid with water.

[0072] Multiple liquid distribution lines 8 are connected to a single liquid mixing line 16 via a sealed connection, or each liquid distribution line 8 is equipped with a single liquid mixing line 16. The inner diameter of the liquid mixing line 16 is smaller than that of the liquid distribution line 8. The other end of the liquid mixing line 16 is connected to the original liquid replenishment unit 17 and the water replenishment unit 18 via a three-way reversing valve. The three-way reversing valve is electrically connected to the control cabinet, enabling automatic switching without the need for manual operation.

[0073] The raw material replenishment unit 17 is located on one side of the liquid preparation area and includes a raw material storage tank and a raw material transfer pump. The raw material storage tank adopts a sealed structure with a volume of 1-2 m³ and is filled with cutting fluid raw material. A level gauge is installed on the outside of the raw material storage tank to display the remaining amount of raw material in real time. The raw material transfer pump is fixedly installed at the outlet of the raw material storage tank and connected to the mixing pipeline 16 to transport the cutting fluid raw material to the mixing pipeline 16. The flow rate of the raw material transfer pump is adjustable.

[0074] The water replenishment unit 18 is arranged adjacent to the raw liquid replenishment unit 17, and includes a clean water storage tank and a clean water delivery pump. The volume of the clean water storage tank is the same as that of the raw liquid storage tank, and it is filled with industrial clean water that meets the standards. The clean water storage tank is provided with a water inlet for timely replenishment of clean water. The clean water delivery pump has the same structure as the raw liquid delivery pump, is fixedly installed at the outlet of the clean water storage tank, and is connected to the mixing pipeline 16 to deliver clean water to the mixing pipeline 16. The flow rate can be adjusted synchronously.

[0075] When the concentration of the recycled cutting fluid is lower than the preset value (the preset concentration range is 5%-10%), the control cabinet controls the three-way reversing valve to switch to the replenishment unit 17, starts the replenishment pump, and delivers the cutting fluid concentrate to the distribution line 8 through the mixing line 16 to mix with the recycled cutting fluid until the concentration reaches the standard. When the concentration of the recycled cutting fluid is higher than the preset value, the control cabinet controls the three-way reversing valve to switch to the water replenishment unit 18, starts the clean water pump, and delivers clean water to the distribution line 8 through the mixing line 16 to dilute the recycled cutting fluid until the concentration reaches the standard. Concentration detection can be achieved by installing a concentration sensor in the cutting fluid container 7. The concentration sensor is electrically connected to the control cabinet and transmits concentration data in real time.

[0076] In some embodiments, a centrifugal device is provided in the cutting fluid reservoir 7 to centrifuge and rotate the secondary cutting fluid in the cutting fluid reservoir 7 to further separate residual aluminum shavings in the secondary cutting fluid and increase the reaction rate of the secondary cutting fluid through the oxygenation and sterilization process of the treatment system 21.

[0077] The centrifuge is fixedly installed at the bottom of the cutting fluid reservoir 7, and is coaxially arranged with the cutting fluid reservoir 7 to avoid eccentric vibration during operation. The centrifuge includes a drive motor, a centrifugal drum and a support. The support is fixedly installed on the bottom inner wall of the cutting fluid reservoir 7, and the drive motor is fixedly installed on the support and connected to the centrifugal drum through a coupling to drive the centrifugal drum to rotate at high speed. The centrifugal drum is made of stainless steel and has small through holes (the diameter of the through holes is 5-10μm) on its side wall to facilitate the flow of cutting fluid and at the same time trap small impurities.

[0078] The operation of the centrifuge is linked to the treatment system 21. When the secondary cutting fluid enters the cutting fluid container 7, the centrifuge starts, and the drive motor drives the centrifugal drum to rotate at a high speed of 1500-2000 r / min. Under the action of centrifugal force, the fine aluminum shavings (particle size <20μm) and impurities remaining in the secondary cutting fluid are thrown to the inner wall of the centrifugal drum and intercepted through the through holes. The purified cutting fluid diffuses to the outside of the centrifugal drum under the action of centrifugal force and comes into contact with the treatment system 21. At the same time, during the centrifugal rotation, the cutting fluid will be violently stirred, so that the cutting fluid and the oxygen generated by the treatment system 21 can fully contact each other, which greatly improves the reaction rate of oxygenation and sterilization of the treatment system 21 and shortens the sterilization time.

[0079] Preferably, the inner wall of the centrifugal drum is provided with a removable filter liner. The filter liner is made of non-woven fabric and can be disassembled and cleaned regularly to remove trapped fine aluminum shavings and impurities and avoid clogging the through holes. The centrifugal equipment is equipped with an overload protection device. When too much material is trapped in the centrifugal drum, causing excessive load, the overload protection device is triggered and automatically shuts down the drive motor to prevent equipment damage.

[0080] Centrifuges can further separate fine aluminum shavings and impurities remaining in the secondary cutting fluid, thereby improving the purity of the reused cutting fluid and preventing fine impurities from entering the machine tool, damaging machine tool parts, or affecting machining accuracy.

[0081] In some embodiments, the processing system 21 includes a compressed air oxygenation module, an ejector-type dissolved air oxygenation module, and an ultraviolet sterilization module. The compressed air oxygenation module and the ejector-type dissolved air oxygenation module are connected in parallel and switch the operating mode in real time according to the dissolved oxygen concentration in the cutting fluid container 7. When the dissolved oxygen concentration is lower than the lower limit of the preset concentration, the compressed air oxygenation module and the ejector-type dissolved air oxygenation module start synchronously. The ultraviolet sterilization module is linked to the flow rate of the cutting fluid and adapts the ultraviolet power according to the flow rate of the cutting fluid.

[0082] The treatment system 21 is integrated inside the cutting fluid container tank 7 and is used to oxygenate and sterilize the secondary cutting fluid to ensure the quality of the reused cutting fluid. It includes a compressed air oxygenation module, an injection dissolved air oxygenation module, and an ultraviolet sterilization module. The three modules work together to achieve efficient oxygenation and thorough sterilization of the cutting fluid.

[0083] The compressed air oxygenation module and the jet-type dissolved air oxygenation module are connected in parallel. Both have their outlets extending to the bottom of the cutting fluid reservoir 7 and are electrically connected to the control cabinet. Their operating modes can be switched in real time based on the dissolved oxygen concentration in the cutting fluid reservoir 7. The compressed air oxygenation module includes an air compressor and an aeration disc. The air compressor is fixedly installed on the outside of the cutting fluid reservoir 7 and connected to the aeration disc via an air pipe. The aeration disc is fixedly installed at the bottom of the cutting fluid reservoir 7 and has multiple small aeration holes. The air compressor delivers compressed air to the aeration disc, generating tiny bubbles through the aeration holes, ensuring sufficient contact between the air and the cutting fluid and increasing the dissolved oxygen concentration. The jet-type dissolved air oxygenation module includes a dissolved air pump and a dissolved air tank. The dissolved air pump mixes air and cutting fluid and delivers it to the dissolved air tank, forming dissolved air water. This dissolved air water is then released into the cutting fluid reservoir 7 through a release device. The release of the dissolved air water generates a large number of tiny bubbles, resulting in a dissolved oxygen efficiency far exceeding that of the compressed air oxygenation module.

[0084] A dissolved oxygen sensor is installed inside the cutting fluid reservoir 7. The sensor is electrically connected to the control cabinet to collect the dissolved oxygen concentration of the cutting fluid in the reservoir in real time. The preset dissolved oxygen concentration range is 8-12 mg / L. When the dissolved oxygen concentration is lower than the lower limit of the preset concentration (<8 mg / L), the control cabinet controls the compressed air oxygenation module and the jet-type dissolved air oxygenation module to start synchronously to quickly increase the dissolved oxygen concentration. When the dissolved oxygen concentration reaches the preset range, the jet-type dissolved air oxygenation module is turned off, and only the compressed air oxygenation module is started to maintain a stable dissolved oxygen concentration. When the dissolved oxygen concentration is higher than the upper limit of the preset concentration (>12 mg / L), both oxygenation modules are turned off to avoid energy waste.

[0085] The ultraviolet (UV) sterilization module is fixedly installed in the middle of the cutting fluid reservoir 7, below the cutting fluid level. It includes a UV lamp and a protective sleeve. The protective sleeve is made of quartz glass and seals the UV lamp to prevent corrosion from the cutting fluid. The UV lamp is a high-intensity UV lamp with highly efficient sterilization, effectively killing bacteria, mold, and other microorganisms in the cutting fluid (sterilization rate ≥99%). The UV sterilization module is linked to the cutting fluid flow rate. A flow sensor is installed inside the cutting fluid reservoir 7 to collect the cutting fluid flow rate in real time. The control cabinet adjusts the UV power according to the flow rate.

[0086] When the flow rate is high (>0.5m / s), increase the UV power (adjustable range 80-100W) to ensure thorough sterilization;

[0087] When the flow rate is slow (<0.3m / s), reduce the UV power (adjustable range 40-60W) to save energy.

[0088] Based on the same inventive concept, the present invention also provides a control strategy for high-flow-rate liquid preparation in machining, which includes the following steps based on the above-mentioned high-flow-rate liquid preparation system for machining:

[0089] S1: Current sensors are fixedly installed at the spindle motors of each machine tool on multiple machining lines in the workshop. The current sensors are high-precision Hall current sensors with a measurement range of 0-50A and a measurement accuracy of ≤±0.5%. The current sensors are electrically connected to the system control cabinet via signal lines to collect the load current data of each machine tool spindle motor in real time and transmit the collected current data to the processor in the control cabinet in real time. The acquisition frequency is 1 time / second to ensure the real-time performance and accuracy of the data acquisition.

[0090] Preferably, the current sensor adopts a waterproof and sealed structure, which is suitable for the humid and oily environment of the machining workshop and extends its service life. Each current sensor is equipped with a unique identifier, which corresponds one-to-one with the corresponding machine tool and liquid distribution pipeline 8, so that the control cabinet can easily identify the load status of each machine tool.

[0091] S2: After receiving the load current data transmitted from each current sensor, the processor in the control cabinet immediately analyzes and processes the collected current data. Combined with the rated current value of each machine tool spindle motor (pre-set and stored in the control cabinet), it determines the processing load status of each machine tool. The specific determination rules are as follows:

[0092] When the current of any machine tool spindle motor exceeds its rated current value for 3 consecutive seconds, the processor determines that the machine tool is in a high-load processing state (such as heavy cutting, high-speed cutting, etc.) and immediately triggers the high-load response mode of the corresponding pipeline of the liquid distribution system.

[0093] When the current of any machine tool spindle motor is lower than its rated current value for 5 consecutive seconds, the processor determines that the machine tool is in a low-load processing state (such as light cutting, idling, standby, etc.) and immediately triggers the low-load response mode of the corresponding pipeline of the liquid dispensing system.

[0094] When the current of the machine tool spindle motor fluctuates around the rated current value (not meeting the above two judgment conditions), the processor determines that the machine tool is in a normal load processing state, and the liquid dispensing system maintains the current liquid dispensing flow rate unchanged.

[0095] S3: Based on the determined machine tool load status, the control cabinet adjusts the frequency of the dispensing pump 9 in the corresponding dispensing pipeline 8 to match the dispensing flow rate with the machine tool load. The specific adjustment method is as follows:

[0096] In high-load response mode, the control cabinet outputs a control signal to control the liquid distribution pump 9 (variable frequency centrifugal pump) in the corresponding liquid distribution pipeline 8 to increase the operating frequency. The frequency adjustment range is 35-50Hz, which increases the flow rate of recycled cutting fluid in the liquid distribution pipeline 8 to meet the high flow rate requirements of cutting fluid during high-load machining (such as cooling, lubrication, and chip removal), and ensure machining accuracy and tool life.

[0097] In low load response mode, the control cabinet outputs a control signal to control the liquid pump 9 of the corresponding liquid distribution pipeline 8 to reduce the operating frequency. The frequency adjustment range is 10-25Hz, which reduces the flow rate of recycled cutting fluid in the liquid distribution pipeline 8, avoids waste of cutting fluid, and reduces the energy consumption of the liquid pump 9.

[0098] Preferably, the frequency adjustment of the dispensing pump 9 adopts a gradual adjustment (adjustment rate of 5Hz / min) to avoid excessive pressure fluctuations in the pipeline caused by sudden changes in flow rate, which could damage the pipeline or the dispensing pump 9.

[0099] By installing a current sensor at the machine tool spindle motor, real-time monitoring and accurate determination of the machine tool load status are achieved, providing a reliable basis for adjusting the fluid flow rate. The fluid response mode is automatically switched according to the machine tool load status, and the frequency of the fluid pump is adjusted to match the fluid flow rate with the machine tool load. This not only meets the machine tool's demand for cutting fluid under different working conditions, but also avoids the waste of cutting fluid and electricity, achieving the goal of energy saving and consumption reduction.

[0100] Based on the above, the control strategy for solution preparation is further optimized by adding graded control for reflux liquid purification. The treatment intensity and solution flow rate are adjusted according to the degree of contamination of the reflux liquid to further improve treatment efficiency and energy saving effect. The specific implementation method is as follows:

[0101] Based on the above control strategy, a data acquisition link for reflux fluid contamination is added: a particle size analyzer and an oil content detector are installed at the input end of reflux pipeline 1 (i.e., the convergence point of the reflux ports of each machine tool cutting fluid). Both are electrically connected to the control cabinet to collect particle size distribution data and oil content data of impurity particles in the reflux fluid in real time. The acquisition frequency is 1 time / 2 seconds to ensure that the degree of contamination of the reflux fluid can be grasped in a timely manner.

[0102] After receiving particle size distribution data and oil content data, the processor in the control cabinet analyzes and processes the data. Based on preset three-level processing priority thresholds, it determines the contamination level of the reflux liquid and triggers the corresponding processing mode and liquid preparation adjustment strategy. The preset three-level processing priority thresholds are as follows (which can be adjusted according to actual processing needs):

[0103] Level 1 Priority (Heavy Contamination): Particles with a diameter ≥50μm or oil content ≥5% in the reflux solution;

[0104] Secondary priority (moderate contamination): Particles with a diameter of 20μm or less and a particle size of 50μm or an oil content of 2% or less and a content of 5% or less in the reflux solution;

[0105] Level 3 Priority (Slight Contamination): Particle size <20μm and oil content <2% in the reflux liquid.

[0106] The corresponding treatment modes and solution preparation adjustment strategies for different priorities are as follows:

[0107] 1) When it is determined to be a first priority (heavy pollution): the control cabinet will first start the centrifuge equipment and treatment system 21 in the cutting fluid container tank 7 of the return fluid treatment mechanism (the three modules start synchronously), and at the same time link the sedimentation scraper 2 of the separation mechanism to increase its scraping speed to the maximum value (1m / min), enhance the aluminum chip separation effect, and form a multi-stage purification loop of sedimentation scraping, centrifugal purification, and oxygenation sterilization to ensure that the return fluid can be purified quickly;

[0108] If the machine tool is in high load response mode at this time, in order to ensure the purification effect and prevent incompletely purified cutting fluid from entering the machine tool, the control cabinet will suspend the fluid supply of at least 3 non-critical machining machines (non-critical machines can be preset in advance, such as standby machines or machines with low machining accuracy requirements), and use more flow for return fluid purification and fluid supply of critical machines.

[0109] If the machine tool is in low load response mode at this time, the control cabinet controls the liquid dispensing system to maintain low load liquid dispensing state, while prioritizing the purification treatment of the return liquid through the sedimentation scraper 2, vacuum paper belt filter 10 and oil-water separator 6, extending the running time of each processing module to ensure that the purification meets the standards.

[0110] 2) When the level is determined to be secondary priority (medium contamination): the control cabinet starts the vacuum paper tape filter 10 (runs at full power) and the oil removal equipment of the oil-water separator 6 (oil remover 12 and separator 13 start synchronously) to strengthen primary filtration and oil removal treatment and ensure the purity of the secondary cutting fluid.

[0111] If the machine tool is in high load response mode at this time, the control cabinet controls the operating frequency of the liquid pump 9 in the corresponding liquid distribution pipeline 8 to increase by 15% to 20% (calculated based on the current frequency) to meet the high load processing requirements while ensuring a stable supply of cutting fluid;

[0112] If the machine tool is in low load response mode at this time, the control cabinet controls the operating frequency of the liquid pump 9 in the corresponding liquid distribution pipeline 8 to decrease by 10% to 15%, further saving energy and avoiding waste of cutting fluid.

[0113] 3) When the pollution is classified as Level 3 (light pollution): the control cabinet will only activate the filtration module of the vacuum paper tape filter 10 (no need to activate the vacuum adsorption device, relying solely on gravity filtration), without activating other purification modules, thus reducing energy consumption;

[0114] If the machine tool is in high load response mode at this time, the control cabinet controls the operating frequency of the liquid pump 9 in the corresponding liquid distribution pipeline 8 to increase by 15% to 20% to meet the high load processing requirements.

[0115] If the machine tool is in low load response mode at this time, the control cabinet controls the operating frequency of the liquid pumps 9 in all liquid distribution pipelines 8 to decrease by 10% to 15%, thereby maximizing energy saving.

[0116] Preferably, the control cabinet has a pre-set data storage module that can record reflux contamination data, machine tool load data, and liquid mixing adjustment parameters, which facilitates later query and analysis by staff to optimize the three-level threshold and adjustment strategy; at the same time, an alarm module is set up, which triggers an emergency alarm when the reflux contamination level is at the first priority level for 10 seconds, reminding staff to check for machine tool malfunctions.

[0117] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control strategy for high-flow-rate liquid preparation in machining, based on a high-flow-rate liquid preparation system for machining, characterized in that: The high-flow-rate liquid distribution system for machining includes a separation mechanism, an aluminum chip handling mechanism, a cutting fluid handling mechanism, a reflux fluid handling mechanism, and a control cabinet; The separation mechanism includes a return pipe (1) and a settling scraper (2) arranged in sequence. The return pipe (1) receives the mixed cutting fluid containing aluminum chips and transmits it to the settling scraper (2). The settling scraper (2) is used to separate the aluminum chips in the mixed cutting fluid to obtain primary cutting fluid. The aluminum chip processing mechanism includes a vibrating conveyor (3), a spin dryer (4), and an aluminum chip collection unit (5) arranged in sequence. The vibrating conveyor (3) is used to receive aluminum chips separated from the settling scraper (2) and transport them to the spin dryer (4). The spin dryer (4) removes residual cutting fluid adhering to the aluminum chips by spin drying. The aluminum chip collection unit (5) is used to collect the aluminum chips after spin drying. The cutting fluid treatment mechanism includes an oil-water separator (6), which is equipped with an oil removal device. The oil-water separator (6) receives primary cutting fluid and residual cutting fluid after separation by a settling scraper (2), and obtains secondary cutting fluid after passing through the oil removal device. The reflux fluid treatment mechanism includes a cutting fluid reservoir (7), a treatment system (21) installed in the cutting fluid reservoir (7), and multiple liquid distribution pipelines (8) connected to the cutting fluid reservoir (7). The cutting fluid reservoir (7) is used to receive secondary cutting fluid and, after being oxygenated and sterilized by the treatment system (21), forms recycled cutting fluid, which is then distributed to the multiple liquid distribution pipelines (8). Each liquid distribution pipeline (8) is equipped with a liquid distribution pump (9), and the frequency of the liquid distribution pump (9) is adjusted to distribute the recycled cutting fluid in the liquid distribution pipeline (8) to the corresponding machine tool. A vacuum paper belt filter (10) is installed between the settling scraper (2) and the oil-water separator (6); The primary cutting fluid enters the vacuum paper tape filter (10) through the overflow pipe, and enters the oil-water separator (6) after being filtered by the filter paper of the vacuum paper tape filter (10) under the action of gravity and negative pressure. The cutting fluid container (7) is equipped with a centrifugal device. By centrifuging and rotating the secondary cutting fluid in the cutting fluid container (7), the residual aluminum chip particles in the secondary cutting fluid are separated again and the reaction rate of the secondary cutting fluid passing through the treatment system (21) for oxygenation and sterilization is increased. A particle size analyzer and an oil content detector are installed at the inlet of the reflux pipeline; The control strategy for high-flow-rate liquid preparation in machining includes the following steps: S1: Current sensors are installed at the spindle motors of each machine tool on multiple machining lines, and the load current data of each motor is collected in real time through the control cabinet; S2: The control cabinet analyzes the collected current data. When the current of any motor is higher than its rated value for 3 consecutive seconds, the machine tool is determined to be in a high-load processing state, and the high-load response mode of the liquid dispensing system is triggered synchronously. When the current of any motor is lower than its rated value for 5 consecutive seconds, the machine tool is determined to be in a low-load processing state, and the low-load response mode of the liquid dispensing system is triggered synchronously. S3: In high load response mode, control the liquid dispensing pump (9) of the corresponding liquid dispensing pipeline (8) to increase the operating frequency; in low load response mode, control the liquid dispensing pump (9) of the corresponding liquid dispensing pipeline (8) to decrease the operating frequency. The control cabinet collects real-time data on the particle size distribution and oil content of impurities in the reflux liquid, and sets three-level processing priority thresholds based on the collected data. First priority: If the particle size is ≥50μm or the oil content is ≥5%, the control cabinet will prioritize starting the centrifugal equipment and treatment system (21) in the cutting fluid container (7) of the reflux liquid treatment mechanism, and link the settling scraper (2) to strengthen the separation and form a multi-stage purification circuit; if the machine tool is in a high load response mode at this time, the liquid supply of at least 3 non-critical processing machine tools will be suspended; if the machine tool is in a low load response mode at this time, priority will be given to ensuring the full-process purification treatment of the reflux liquid through the settling scraper (2), vacuum paper belt filter (10) and oil-water separator (6); Secondary priority: For particles with a diameter of 20μm ≤ 50μm or an oil content of 2% ≤ 5%, start the oil removal equipment of the vacuum paper belt filter (10) and the oil-water separator (6); if the machine tool is in high load response mode at this time, control the operating frequency of the liquid pump (9) of the corresponding liquid distribution pipeline (8) to increase by 15% to 20%; if the machine tool is in low load response mode at this time, control the operating frequency of the liquid pump (9) of the corresponding liquid distribution pipeline (8) to decrease by 10% to 15%; Level 3 priority: If the particle size is <20μm and the oil content is <2%, only the filter module of the vacuum paper tape filter (10) will be started; if the machine tool is in high load response mode at this time, the operating frequency of the liquid pump (9) of the corresponding liquid distribution pipeline (8) will be increased by 15% to 20%; if the machine tool is in low load response mode at this time, the operating frequency of the liquid pump (9) of all liquid distribution pipelines (8) will be reduced by 10% to 15%.

2. The control strategy for high-flow-rate liquid preparation in machining as described in claim 1, characterized in that, The vacuum paper tape filter (10) is connected to a scraper drainer (11), which is used to scrape off the filtered filter paper along with the aluminum shavings on the filter paper and collect them into the slag car (19) and the waste paper winding device (20).

3. The control strategy for high-flow-rate liquid preparation in machining as described in claim 1, characterized in that, The oil removal equipment includes an oil remover (12) and a separation tank (13). The oil remover (12) is located at the inlet end of the oil-water separator (6) and is used to separate primary cutting fluid and residual cutting fluid into oil and secondary cutting fluid. The separation tank (13) is connected to the oil remover (12) and is used to receive the separated oil.

4. The control strategy for high-flow-rate liquid preparation in machining as described in claim 1, characterized in that, The cutting fluid container (7) is connected to multiple fluid supply lines (14), and the multiple fluid supply lines (14) are connected to a common manifold (15). The multiple fluid distribution lines (8) are respectively connected to the return line (1). Pressure detection units are provided on both the liquid supply line (14) and the return line (1).

5. The control strategy for high-flow-rate liquid preparation in machining as described in claim 1, characterized in that, The liquid preparation pipeline (8) is connected to a mixing pipeline (16), which is switched between a replenishing original liquid unit (17) and a water replenishing unit (18). The replenishing original liquid unit (17) is filled with cutting fluid stock solution, and the water replenishing unit (18) is filled with water. The original fluid is replenished by switching the mixing pipeline (16) to the original fluid replenishment unit (17) or the liquid distribution pipeline (8); or the original fluid is replenished by switching the mixing pipeline (16) to the water replenishment unit (18) and the liquid distribution pipeline (8).

6. The control strategy for high-flow-rate liquid preparation in machining as described in claim 1, characterized in that, The processing system (21) includes a compressed air oxygenation module, an ejector-type dissolved air oxygenation module, and an ultraviolet sterilization module. The compressed air oxygenation module and the ejector-type dissolved air oxygenation module are connected in parallel and switch the operating mode in real time according to the dissolved oxygen concentration in the cutting fluid container (7). When the dissolved oxygen concentration is lower than the lower limit of the preset concentration, the compressed air oxygenation module and the ejector-type dissolved air oxygenation module start synchronously. The ultraviolet sterilization module is linked to the flow rate of the cutting fluid and the ultraviolet power is adapted according to the flow rate of the cutting fluid.

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