Parametric regulation system and method for gas jet cooling of a metal cutting zone

Abstract

The present application relates to the field of compressed gas cooling cooling jet form, specifically sets a kind of parameterized control system and method for gas jet cooling metal cutting area.A kind of parameterized control method for gas jet cooling metal cutting area, according to the diameter of cooling jet Mach disc end is determined as required, preliminary setting the front-end parameter of cooling jet.The actual position of the end of Mach disc under this parameter, diameter and the stagnation pressure of the position are measured respectively.Combined with the calculation model constructed to calculate the coefficient k and α in the calculation model.Again by adjusting the front-end parameter pressure and the size of nozzle aperture, until the diameter of Mach disc end is adjusted to meet the actual requirement.On this basis, the size of mass flow is adjusted to adjust the temperature of jet, until the temperature of Mach disc end meets the minimum requirement of cooling.Through the above parameter adjustment idea, the area of jet cooling capacity strongest can be fully utilized to rapidly and uniformly cool the heat generation area of metal cutting area.

Description

Technical Field

[0001] This invention relates to the field of cooling jet morphology for compressed gas cooling, specifically a parameterized control system and method for cooling the metal cutting zone with gas jets. Background Technology

[0002] Metal cutting is a material removal and forming method in metal forming processes, and it still accounts for a large proportion of modern machinery manufacturing. The metal cutting process is an interaction between the workpiece and the tool. The cutting tool removes excess metal from the workpiece, achieving the geometric accuracy, dimensional accuracy, and surface quality required by design and process specifications while controlling productivity and cost. To achieve this process, there must be relative movement between the workpiece and the cutting tool, i.e., the cutting motion, which is provided by the metal cutting machine tool. The machine tool, fixture, cutting tool, and workpiece constitute a machining process system.

[0003] Gas jet cooling technology is a highly efficient cooling technique that uses compressed gas for cooling. Based on the Joule-Thompson effect, this technology removes heat generated in the metal cutting zone by expelling compressed gas into the air, causing the high pressure to drop to atmospheric pressure and resulting in an expansion and heat absorption process.

[0004] In existing technologies, when using gas jet cooling to cool the metal cutting zone, parameters such as the jet field temperature or gas flow rate are typically adjusted manually based on experience to improve the cooling effect. However, this manual parameter adjustment method is inefficient, and even after adjusting these parameters, the gas jet cooling device still struggles to quickly and effectively cool the metal cutting zone, resulting in poor overall cooling performance. Summary of the Invention

[0005] To address the problem that existing gas jet cooling devices still cannot effectively cool the metal cutting zone even after adjusting parameters such as jet field temperature or gas flow rate, this invention provides a method for regulating the parameters of gas jet cooling in the metal cutting zone.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a method for regulating parameters of a gas jet cooling metal cutting zone, comprising the following steps:

[0007] (1) Connect the gas jet cooling device to the PLC feedback controller, and construct the distance between the end position of the Mach disk formed after the cooling gas is injected from the gas jet cooling device and the cooling gas outlet in the PLC feedback controller. L M and the diameter at the end of the Mach disk d MThe computational model is expressed as follows:

[0008] (1)

[0009] (2)

[0010] (3)

[0011] in, k This is the proportionality coefficient. d n The diameter of the nozzle in the gas jet cooling device; P 0 represents the stagnation pressure in the gas jet cooling device; For environmental pressure, α This is an empirical coefficient. γ For specific heat ratio, c P For isobaric specific heat capacity, c V Specific heat capacity at constant volume;

[0012] (2) Determine the diameter of the end position of the Mach disk required to cover the heat source based on the size of the heat-generating area in the metal cutting zone. d M The Mach disk is formed by the gas ejected from the gas jet cooling device;

[0013] (3) The gas jet cooling device is initially set to have a diameter of d M The front jet parameters, wherein the pressure of the gas ejected during the jet is... P The nozzle diameter is d n mass flow rate is And open the control valve in the gas jet cooling device;

[0014] (4) Adjust the actual pressure of the gas jet by using the pressure stabilizing valve to control its pressure value to be stable at the set pressure. P The actual mass flow rate of the gas jet is adjusted by a mass flow controller to stabilize the mass flow rate at the set value. ;

[0015] (5) The distance between the end position of the Mach disk actually formed after the cooling gas injection and the cooling gas outlet is measured by a high-speed camera under the parameters set in step (3). L M,0 And the diameter of the end position of the actually formed Mach disk d M,0 ;

[0016] (6) The actual stagnation pressure at the end of the Mach disk was measured by a temperature and pressure sensor. P M,0 The distance between the end position of the Mach disk and the cooling gas outlet is calculated based on the front-end parameters set in step (3). L M and the diameter at the end of the Mach disk d M coefficients in the calculation model k as well as α .

[0017] (7) Define variables i and initialize i =1;

[0018] (8) The PLC feedback controller obtains the first i The diameter of the end position of the Mach disk measured in this study is: d M,i And the diameter of the Mach disk at the end position that is expected to cover the heat generation area of ​​the metal cutting zone. d M The difference is calculated, and the control precision is set to Δ. d ,Will d M,i - d M With Δ d Make comparisons; when d M,i - d M <0, or d M,i > d M and d M,i - d M >Δ d If so, then proceed to step (9); when step d M,i > d M and d M,i - d M <Δ d If so, then proceed to step (11);

[0019] (9) Based on the calculation model of the distance between the end position of the Mach disk and the cooling gas outlet and the diameter of the end position of the Mach disk in step (1), and combined with the coefficients of the calculation model in step (6), k as well as α To adjust the pressure P or nozzled n To change the diameter of the end of the Mach disk so that the diameter of the end of the Mach disk meets the condition of step (8);

[0020] (10) will i The value of +1 is assigned to i and return to step (8);

[0021] (11) The PLC feedback controller obtains the parameters finally obtained in step (9), including the actual pressure at the nozzle inlet at this time. P Nozzle size d n Therefore, the coefficients obtained from step (6) are combined with this. k To calculate the distance between the end position of the Mach disk and the cooling gas outlet at this point. L M,i The distance between the end position of the Mach disk and the cooling gas outlet is calculated using temperature and pressure sensors. L M,i At that time, the stagnation temperature at the end of the Mach disk T M,0 ;

[0022] (12) Define variables j and initialize j =1;

[0023] (13) The temperature sensor measured the first j The stagnation temperature at the end of the Mach disc measured in this second measurement. T M,j and the desired stagnation temperature T M The difference is calculated, and the control precision is set to Δ. T ,Will T M - T M,j With Δ T In comparison, if T M,j > T M ,or T M > T M,j and T M - T M,j >Δ T If so, proceed to step (14); T M > T M,j and TM - T M,j <Δ T Then proceed to step (16).

[0024] (14) Increasing the mass flow rate of the gas jet cooling device jet by means of a mass flow controller. This is to reduce the stagnation temperature of the gas jet at the end of the Mach disk.

[0025] (15) will j The value of +1 is assigned to j and return to step (13);

[0026] (16) The PLC feedback controller obtains the front-end parameters of the adjusted Mach disk: the actual pressure at the nozzle inlet. P Nozzle size d n and the mass flow rate of the regulated gas ; and the distance between the actual end of the formed Mach disk and the cooling gas outlet. L M The diameter at the end of the Mach disk d M And the actual stagnation temperature at the end of the Mach disk. T M The adjusted parameters are then applied to the cooling of the actual metal cutting zone.

[0027] As a further improvement to the above scheme, the Δ d The numerical range is d M Between 5% and 20%.

[0028] As a further improvement to the above scheme, the Δ d The value is d M 5%.

[0029] As a further improvement to the above scheme, the Δ T The numerical range is T M Between 5% and 20%.

[0030] As a further improvement to the above scheme, the Δ T The value is T M 5%.

[0031] A parameterized control system for gas jet cooling of a metal cutting zone is disclosed. This system utilizes the aforementioned parameterized control method for gas jet cooling of a metal cutting zone. The system comprises a gas jet cooling device and a PLC feedback controller. The gas jet cooling device includes an injection device, a parameter adjustment device, and a data acquisition device. The injection device is mounted on the parameter adjustment device, and the data acquisition device is located on one side of the parameter adjustment device. The gas injected by the injection device forms a jet field between the data acquisition device and the parameter adjustment device. The cutting zone in metal cutting is placed within the jet field, and the injection device is used to inject gas into the jet field. Cooling gas forms a Mach disk within the jet field, thereby cooling the metal cutting zone. The parameter adjustment device adjusts various parameters during the gas jet injection process, ensuring that the diameter of the Mach disk formed at the end of the jet field covers the heat-generating area in the metal cutting zone. The acquisition device collects various parameters during the gas jet cooling process. A PLC feedback controller is connected to the jet device, the parameter adjustment device, and the acquisition device. The PLC feedback controller receives data collected by the acquisition device and uses this data to control the parameter adjustment device to adjust various parameters of the jet device during the gas jet injection process.

[0032] As a further improvement to the above solution, the injection device includes a gas delivery pipe, a nozzle replacement device, and a nozzle. One end of the nozzle replacement device is connected to the gas delivery pipe, and the other end of the nozzle replacement device is connected to the nozzle. The gas delivery pipe is used to deliver compressed gas to the nozzle through the nozzle replacement device. The nozzle is used to inject cooling gas into the jet field. The injected gas can form a Mach disk in the jet field to cool the metal cutting zone placed in the jet field.

[0033] As a further improvement to the above solution, the parameter adjustment device includes a mass flow controller, a pressure setpoint valve, and a control valve. The control valve is installed at the inlet of the gas delivery pipeline and is used to control the opening and closing of the gas delivery pipeline. The pressure setpoint valve is installed on the gas delivery pipeline and positioned between the control valve and the nozzle replacement device. The pressure setpoint valve is used to adjust the pressure of the cooling gas entering the nozzle on the gas delivery pipeline. The mass flow controller is installed on the gas delivery pipeline and positioned between the pressure setpoint valve and the nozzle replacement device. The mass flow controller is used to control the mass flow rate of the gas on the gas delivery pipeline.

[0034] As a further improvement to the above solution, the gas jet cooling device also includes a slide table, the jetting device is equipped with a slide plate, the nozzle changing device is fixedly installed on the slide plate, and the slide plate is slidably installed on the slide table. The distance between the nozzle and the collection device is adjusted by sliding the slide plate.

[0035] As a further improvement to the above solution, the acquisition device includes a high-speed camera, a temperature and pressure sensor, a sensor mounting device, and a signal acquisition card; the high-speed camera is arranged perpendicular to the central axis of the slide and faces the jet field; the temperature and pressure sensor is mounted on the sensor mounting device and connected to the signal acquisition card, and the signal acquisition card is located on the side of the high-speed camera away from the nozzle; the sensor mounting device is located on the central axis of the slide, and the temperature and pressure sensor faces the nozzle. The temperature and pressure sensor is used to measure the stagnation temperature and stagnation pressure at the end of the Mach disk formed after the gas is ejected from the nozzle; the high-speed camera is used to measure the diameter at the end of the Mach disk formed by the gas ejected by the jetting device and the distance between the end of the Mach disk and the nozzle.

[0036] As a further improvement to the above solution, the high-speed camera and the nozzle are aligned at the same height in the vertical direction of the jet field.

[0037] As a further improvement to the above scheme, the center of the circle at the end of the Mach disk formed by the jet field of the cooling gas ejected from the nozzle coincides with the center of the temperature and pressure sensor.

[0038] Furthermore, the distance between the nozzle and the temperature and pressure sensor is 0mm to 3mm.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] (1) The present invention measures the distance between the end position of the microscopic field (Mach disk) and the nozzle. L M The diameter of the end position of the formed Mach disk d M And the stagnation temperature at the end of the Mach disk. T M This is achieved by adjusting the diameter of the Mach disk so that the diameter at the end of the formed Mach disk can cover the high-temperature area in the metal cutting zone. This utilizes the low temperature at the end of the Mach disk to effectively cool the metal cutting zone, significantly improving its cooling efficiency.

[0041] (2) This invention enables the end position of the Mach disk to completely cover the heat-generating area of ​​the metal cutting zone through parameter adjustment. That is, during the process of gas jet cooling of the metal cutting zone, the area with the strongest jet cooling capacity can be fully utilized to cover the heat-generating area of ​​the cutting zone with the entire end of the Mach disk, so as to achieve sufficient and uniform cooling. And under the condition of achieving the required cooling temperature, the mass flow rate can be controlled to save energy and reduce emissions. Attached Figure Description

[0042] Figure 1 This is a structural diagram of the Mach disk formed in the parameterized control method for gas jet cooling of the metal cutting zone provided by the present invention.

[0043] Figure 2 A perspective view of the parametric control system for gas jet cooling of the metal cutting zone provided by the present invention.

[0044] Figure 3 The front view of the parametric control system for gas jet cooling of the metal cutting zone provided by the present invention.

[0045] In the diagram: 1. Injection device; 11. Gas delivery pipeline; 12. Nozzle replacement device; 13. Nozzle; 14. Slide plate; 2. Mass flow controller; 3. Pressure stabilizing valve; 4. Jet field; 5. Signal acquisition card; 51. Temperature and pressure sensor; 6. High-speed camera; 7. Slide table; 8. Control valve; 9. Sensor fixing device. Detailed Implementation

[0046] The present invention will now be further described in conjunction with specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0047] In the description of this invention, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific scope of protection of this invention. The terms "first," "second," etc., in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "comprising" and "having," and any variations thereof, in the specification and claims of this invention, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0048] Example 1

[0049] A Mach disk is a gaseous phenomenon that occurs when gas exits a nozzle at supersonic speeds and at pressures lower than the external atmosphere, exhibiting an equally spaced circular shape. During jet cooling, compressed gas also forms a Mach disk in the jet field after exiting the nozzle. The temperature at the tip of the Mach disk is lower than that at other locations in the jet field. Therefore, applying this to cool the heat-generating area of ​​the metal cutting zone would significantly improve the cooling effect of the gas-cooled jet device. Thus, this invention uses the tip of the Mach disk generated by the compressed gas jet cooling to cover the metal cutting zone, thereby achieving effective cooling of the metal cutting zone. Based on this concept, this invention provides a parameterized control method for gas jet cooling of the metal cutting zone, which adjusts the distance between the tip of the microscopic field (Mach disk) and the nozzle. L M The diameter of the end position of the formed Mach disk d M And the stagnation temperature at the end of the Mach disk. T MThe diameter of the Mach disk at its end is adjusted to cover the high-temperature region of the metal cutting zone. This utilizes the low temperature at the end of the Mach disk to effectively cool the metal cutting zone, significantly improving the cooling effect. Therefore, in this embodiment, the parameterized adjustment method described below for the gas jet cooling process allows for the adjustment of relevant parameters of the formed Mach disk, achieving rapid cooling of the metal cutting zone using the gas jet cooling device.

[0050] The inventors thus provide a method for adjusting parameters: First, determine the diameter of the Mach disk tip of the cooling jet as needed, and initially set the front-end parameters of the cooling jet. Then, use a high-speed camera to measure the actual position and diameter of the Mach disk tip under these parameters, and use temperature and pressure sensors to measure its stagnant pressure, calculating the coefficients of the calculation model for the Mach disk tip position and diameter. Based on the required Mach disk tip diameter, adjust the front-end pressure and nozzle diameter until the Mach disk tip diameter meets the requirements. Finally, adjust the mass flow rate to adjust the jet temperature until the Mach disk tip temperature meets the requirements.

[0051] By employing the above parameter adjustment approach, the region with the strongest jet cooling capacity can be fully utilized to cover the heat-generating area of ​​the cutting zone at the end of the Mach disk, achieving thorough and uniform cooling. Furthermore, under the condition of reaching the required cooling temperature, the mass flow rate can be controlled, resulting in energy conservation and emission reduction.

[0052] Specifically, one embodiment of the present invention provides a parameterized control method for gas jet cooling of the metal cutting zone, which includes the following steps:

[0053] (1) Connect the gas jet cooling device to the PLC feedback controller, and construct the distance between the end position of the Mach disk formed after the cooling gas is injected from the gas jet cooling device and the cooling gas outlet in the PLC feedback controller. L M and the diameter at the end of the Mach disk d M The computational model is expressed as follows:

[0054] (1)

[0055] (2)

[0056] (3)

[0057] in, k This is the proportionality coefficient. d n The diameter of the nozzle in the gas jet cooling device; P0 represents the stagnation pressure in the gas jet cooling device; For environmental pressure, α This is an empirical coefficient. γ For specific heat ratio, c P For isobaric specific heat capacity, c V This is the specific heat capacity at constant volume.

[0058] (2) Determine the diameter of the end position of the Mach disk required to cover the heat source based on the size of the heat-generating area in the metal cutting zone. d M The Mach disk is formed by gas ejected from a gas jet cooling device.

[0059] (3) The gas jet cooling device is initially set to have a diameter of d M The front jet parameters at that time, the pressure of the gas ejected in the front jet parameters is P The nozzle diameter is d n mass flow rate is And open the control valve in the gas jet cooling device.

[0060] (4) Adjust the actual pressure of the gas jet by using the pressure stabilizing valve to control its pressure value to be stable at the set pressure. P The actual mass flow rate of the gas jet is adjusted by a mass flow controller to keep it stable near the set value.

[0061] (5) The distance between the end position of the Mach disk actually formed after the cooling gas injection and the cooling gas outlet is measured by a high-speed camera under the parameters set in step (3). L M,0 And the diameter of the end position of the actually formed Mach disk d M,0 .

[0062] (6) The actual stagnation pressure at the end of the Mach disk was measured by a temperature and pressure sensor. P M,0 The distance between the end position of the Mach disk and the cooling gas outlet is calculated based on the front-end parameters set in step (3). L M and the diameter at the end of the Mach disk d M coefficients in the calculation model k as well as α .

[0063] (7) Define variables i and initialize i =1.

[0064] (8) The PLC feedback controller obtains the first i The diameter of the end position of the Mach disk measured in this study is: d M,i And the diameter of the Mach disk at the end position that is expected to cover the heat generation area of ​​the metal cutting zone. d M The difference is calculated, and the control precision is set to Δ. d ,Will d M,i - d M With Δ d Make comparisons; when d M,i - d M <0, or d M,i > d M and d M,i - d M >Δ d If so, then proceed to step (9); when step d M,i > d M and d M,i - d M <Δ d If so, then proceed to step (11).

[0065] (9) Based on the calculation model of the distance between the end position of the Mach disk and the cooling gas outlet and the diameter of the end position of the Mach disk in step (1), and combined with the coefficients of the calculation model in step (6), k as well as α To adjust the pressure P or nozzle d n To change the diameter of the end of the Mach disk so that the diameter of the end of the Mach disk meets the condition of step (8).

[0066] (10) will i The value of +1 is assigned to i Then return to step (9).

[0067] (11) The PLC feedback controller obtains the parameters finally obtained in step (9), including the actual pressure at the nozzle inlet at this time. P Nozzle size d n Therefore, the coefficients obtained from step (6) are combined with this.k To calculate the distance between the end position of the Mach disk and the cooling gas outlet at this point. L M,i The distance between the end position of the Mach disk and the cooling gas outlet is calculated using temperature and pressure sensors. L M,i At that time, the stagnation temperature at the end of the Mach disk T M,0 .

[0068] (12) Define variables j and initialize j =1.

[0069] (13) The temperature sensor measured the first j The stagnation temperature at the end of the Mach disc measured in this second measurement. T M,j and the desired stagnation temperature T M The difference is calculated, and the control precision is set to Δ. T ,Will T M - T M,j With Δ T In comparison, if T M,j > T M ,or T M > T M,j and T M - T M,j >Δ T If so, proceed to step (14); T M > T M,j and T M - T M,j <Δ T Then proceed to step (16).

[0070] (14) Increase the mass flow rate of the gas jet cooling device by using a mass flow controller. This is to reduce the stagnation temperature of the gas jet at the end of the Mach disk.

[0071] (15) will j The value of +1 is assigned to j Then return to step (13).

[0072] (16) The PLC feedback controller obtains the front-end parameters of the adjusted Mach disk: the actual pressure at the nozzle inlet. P Nozzle size d n and the mass flow rate of the regulated gas ; and the distance between the actual end of the formed Mach disk and the cooling gas outlet. L M The diameter at the end of the Mach disk d M And the actual stagnation temperature at the end of the Mach disk. T M The adjusted parameters are then applied to the cooling of the actual metal cutting zone.

[0073] In this embodiment, through the aforementioned series of operational steps, the parameters of the gas jet cooling device can be quickly and effectively adjusted. By adjusting these parameters, the end position of the Mach disk formed during the gas jet cooling process can cover the heat-generating area of ​​the metal cutting zone. Utilizing the end position of the Mach disk, where the jet cooling capacity is strongest, to cool the heat-generating area of ​​the metal cutting zone can significantly improve cooling efficiency. Simultaneously, by adjusting the parameters, the diameter of the Mach disk's end position can cover the entire heat-generating area of ​​the metal cutting zone, thereby achieving sufficient and uniform cooling of the metal cutting zone. Furthermore, this embodiment can also reduce the emission of cooling gas by controlling the mass flow rate while adjusting the required cooling temperature, thus achieving energy saving and emission reduction.

[0074] In this embodiment, the model of the Mach disk formed in the jet field after the cooling gas is injected can be referred to Figure 1 As shown.

[0075] It is understandable that the heat-generating area in the metal cutting zone during step (2) can be understood as an area with a high temperature gradient, which can be obtained using a thermal imager. Therefore, in this embodiment, the diameter of the Mach disk end position required to cover the heat source can be determined based on the size of the high-temperature area (i.e., the area where the cutting tool contacts the workpiece). The high-temperature area refers to the area with a higher temperature than the surrounding area during the metal cutting process. The surrounding area can be understood as the environment surrounding the extremely high temperature of the cutting tool tip.

[0076] It is understandable that in step (3), the gas jet cooling device is initially set to have a diameter of d M The front-end jet parameters can be set manually based on experience. These values ​​are only initial values ​​and will be adjusted subsequently. Therefore, in actual operation, they can be set manually based on experience.

[0077] Step (4) uses a pressure regulating valve to adjust the actual pressure of the gas jet, so that its value is stabilized at the set pressure. P The purpose of maintaining a value close to the setpoint is to reduce pressure fluctuations during the jetting process, thereby improving stability and ensuring that the Mach disk formed after the jet can cover the heat source, thus achieving rapid cooling. The actual mass flow rate of the gas jet is adjusted by a mass flow controller to stabilize it within the setpoint. .

[0078] Among them, mass flow rate It represents the mass per second, or mass flow rate, and the dots above indicate the derivative with respect to time.

[0079] In this embodiment, steps (1) to (6) are equivalent to the preliminary preparations for regulation, the purpose of which is to be able to calculate the values ​​in the computational model. k and α Thus, the calculation model in step (2) can be obtained. The calculation model in step (2) can then be used to quickly adjust, position, and predict the gas jet cooling device, making it convenient to quickly adjust it through subsequent steps.

[0080] In this implementation, Δ in step (8) d and Δ in step (13) T All refer to the adjustment accuracy during the adjustment process, where Δ d and Δ T The pre-set control precision can be determined by setting the specific value before control based on the specific cutting requirements. If the cutting requirements are high, the control precision also needs to be increased accordingly. Therefore, Δ d and Δ T These two values ​​can be set according to the actual cutting requirements.

[0081] In this embodiment, Δ d The adjustment precision can be d M The value is between 5% and 20%.

[0082] In this embodiment, Δ T The adjustment precision can be T M The value is between 5% and 20%.

[0083] Preferably, Δ d The adjustment precision can be d M The value is between 5% and 20%.

[0084] It is understood that in step (9) of this embodiment, the nozzle diameter can be changed. dn The pressure can also be adjusted using a pressure regulating valve. P Alternatively, one can first address the issue based on the actual situation. d n Make adjustments, then proceed to step (8), and then adjust the pressure. P This method may involve first adjusting the pressure. P Then, adjustments are made after comparison using step (8). d n The adjustment can be performed using any of the four methods mentioned above, as long as the diameter of the end of the resulting Mach disk covers the heat-generating area of ​​the metal cutting zone. Therefore, in actual adjustment, the appropriate method can be selected based on the specific circumstances. Using multiple adjustment methods increases selectivity during the process and avoids the limitations of single-variable adjustment, thereby improving the accuracy of the adjustment.

[0085] It is understandable that step (13) is to further adjust the stagnation temperature under the condition that the diameter of the Mach disk at the end position is satisfied. Therefore, in step (13), the temperature sensor measures the temperature of the first... j The stagnation temperature at the end of the Mach disc measured in this second measurement. T M,j That is, the distance between the end position of the Mach disk and the cooling gas outlet, calculated by the temperature and pressure sensors in step (11), is... L M,i At that time, the stagnation temperature at the end of the Mach disk T M,0 .

[0086] In this embodiment, the desired stagnation temperature T M It is a known value that can be determined based on the actual cutting process. The specific determination process is as follows: the stagnation temperature of gas jet cooling is related to the stable temperature of the corresponding metal cutting zone. During the cooling process, there can be over-cooling or under-cooling in the metal cutting zone, leading to workpiece embrittlement, excessively high cutting zone temperatures, and other problems such as accelerated tool wear and reduced machining quality. The optimal temperature of the metal cutting zone under jet cooling lies between these two values, which can be obtained using a thermal imager. The stagnation temperature of the gas jet under these corresponding conditions is the desired stagnation temperature. T M .

[0087] Example 2

[0088] This embodiment provides a parameterized control method for cooling the metal cutting zone using high-pressure CO2 gas jets, which includes the following steps:

[0089] (1) Keep the table surface of the high-precision slide table 3mm away from the temperature and pressure sensor, and put the high-pressure nozzle on the bottom working slot of the nozzle changing device, the central axis of the high-pressure jet control and the center of the temperature and pressure sensor on the same straight line.

[0090] (2) Connect the gas jet cooling device to the PLC feedback controller, and construct the distance between the end position of the Mach disk formed after the cooling gas is injected from the gas jet cooling device and the cooling gas outlet in the PLC feedback controller. L M and the diameter at the end of the Mach disk d M The computational model is expressed as follows:

[0091] (1)

[0092] (2)

[0093] (3)

[0094] in, k This is the proportionality coefficient. d n The diameter of the nozzle in the gas jet cooling device; P 0 represents the stagnation pressure in the gas jet cooling device; For environmental pressure, α This is an empirical coefficient. γ For specific heat ratio, c P For isobaric specific heat capacity, c V This is the specific heat capacity at constant volume.

[0095] (3) Determine the diameter of the end position of the Mach disk required to cover the heat source based on the size of the region with a high temperature gradient in the metal cutting zone. d M The Mach disk is formed by gas ejected from a gas jet cooling device. In this embodiment, the extremely high temperature area where the thermal imager contacts the blade tip has a temperature gradient that can be covered by a diameter of 1.5 mm. Therefore, in step (3) d M It can be set to 1.5mm.

[0096] (4) The gas jet cooling device is initially set to have a diameter of d M The front jet parameters, including the pressure of the gas ejected during jet ejection. P 6MPa, nozzle diameter d nThe diameter is 0.40 mm, the mass flow rate is 2.85 g / s, and the control valve in the gas jet cooling device is opened.

[0097] (5) Adjust the actual pressure of the gas jet by using a pressure regulating valve to control its pressure value to stabilize at the set pressure. P The actual mass flow rate of the gas jet is adjusted using a mass flow controller to stabilize it at the set value. .

[0098] (6) The distance between the end position of the Mach disk actually formed after the cooling gas injection and the cooling gas outlet is measured by a high-speed camera under the parameters set in step (3). L M,0 The diameter is 1.6 mm and the actual diameter of the end of the formed Mach disk. d M,0 It is 1.4mm.

[0099] (7) The actual stagnation pressure at the end of the Mach disk was measured by a temperature and pressure sensor. P M,0 The distance between the end position of the Mach disk and the cooling gas outlet is calculated based on the front-end parameters set in step (3). L M and the diameter at the end of the Mach disk d M coefficients in the calculation model k =0.67 and α =0.91.

[0100] (8) Define variables i and initialize i =1.

[0101] (9) The PLC feedback controller obtains the first i The diameter of the end position of the Mach disk measured in this study is: d M,i And the diameter of the Mach disk at the end position that is expected to cover the heat generation area of ​​the metal cutting zone. d M The difference is calculated, and the control precision is set to Δ. d For 0.1mm, d M,i - d M With Δ d Make comparisons; when d M,i - d M <0, or d M,i > dM and d M,i - d M >Δ d If so, then proceed to step (10); when step d M,i > d M and d M,i - d M <Δ d If so, then proceed to step (12).

[0102] (10) Based on the calculation model of the distance between the end position of the Mach disk and the cooling gas outlet and the diameter of the end position of the Mach disk in step (2), and combined with the coefficients of the calculation model in step (7), k as well as α To adjust the pressure P or nozzle d n To change the diameter of the end of the Mach disk so that the diameter of the end of the Mach disk meets the condition of step (9).

[0103] In this embodiment, the singleness adjustment can be calculated. d n Then you only need to d n The value can be increased by 0.01mm. Alternatively, only the pressure can be adjusted. P Then you only need to increase the pressure. P Simply increase it by 0.1 MPa.

[0104] (11) will i The value of +1 is assigned to i Then return to step (9).

[0105] (12) The PLC feedback controller obtains the parameters finally obtained in step (10), including the actual pressure at the nozzle inlet at this time. P Nozzle size d n Therefore, the coefficients obtained from step (7) are combined with this. k To calculate the distance between the end position of the Mach disk and the cooling gas outlet at this point. L M,i The distance is 1.7 mm. The distance between the end of the Mach disk and the cooling gas outlet is calculated using temperature and pressure sensors. L M,i The stagnation temperature at the end of the Mach disk when the diameter is 1.7 mm. T M,0The temperature is -60℃.

[0106] (13) Define variables j and initialize j =1.

[0107] (14) The temperature sensor measured the first j The stagnation temperature at the end of the Mach disc measured in this second measurement. T M,j , here T M,j That is, step (12) in L M,i The stagnation temperature at the end of the Mach disk when the diameter is 1.7 mm. T M,0 The temperature is -60℃, from which we can obtain T M,j =-60℃. And the expected stagnation temperature. T M In this embodiment, the desired stagnation temperature is -65°C. The control precision Δ is set accordingly. T =1℃. (The rest of the text appears to be incomplete and requires further context.) T M - T M,j With Δ T In comparison, if T M,j > T M ,or T M > T M,j and T M - T M,j >Δ T If so, proceed to step (15); T M > T M,j and T M - T M,j <Δ T Then proceed to step (17).

[0108] (15) Increase the mass flow rate of the gas jet cooling device by using a mass flow controller. This is to reduce the stagnation temperature of the gas jet at the end of the Mach disk.

[0109] (16) will j The value of +1 is assigned to j Then return to step (14).

[0110] (17) The PLC feedback controller obtains the front-end parameters of the adjusted Mach disk: the actual pressure at the nozzle inlet. P Nozzle size d n and the mass flow rate of the regulated gas ; and the distance between the actual end of the formed Mach disk and the cooling gas outlet. L M The diameter at the end of the Mach disk d M And the actual stagnation temperature at the end of the Mach disk. T M The adjusted parameters are then applied to the cooling of the actual metal cutting zone.

[0111] Example 3

[0112] This embodiment provides a parameterized control system for gas jet cooling of the metal cutting zone, which is controlled using the parameterized control method for gas jet cooling of the metal cutting zone described in Embodiment 1. By controlling the parameters during the gas jet cooling process in the above manner, the end position of the Mach disk formed during the gas jet cooling process can completely cover the heat-generating area in the metal cutting zone. Furthermore, by controlling the mass flow rate, efficient and uniform cooling of the metal cutting zone is achieved while simultaneously reducing the emission of cooling gas, thus achieving rapid and efficient cooling while also saving energy and reducing emissions.

[0113] Please refer to Figure 2 and Figure 3 A parameterized control system for gas jet cooling of a metal cutting zone is disclosed, comprising a gas jet cooling device and a PLC feedback controller. The PLC feedback controller is connected to the gas jet cooling device and is used to monitor changes in various parameters during the gas jet cooling process and the cooling of the metal cutting zone. Feedback from these parameter changes can be used to adjust various parameters within the gas jet cooling device. In this embodiment, the parameters include the diameter of the nozzle 13. d n The pressure of the gas ejected at the inlet of nozzle 13 P And the mass flow rate of the gas ejected.

[0114] Please refer to Figure 2The gas jet cooling device includes a jetting device 1, a parameter adjustment device, and a data acquisition device. The jetting device 1 is mounted on the parameter adjustment device, and the data acquisition device is located on one side of the parameter adjustment device. The gas ejected by the jetting device 1 forms a jet field 4 between the data acquisition device and the parameter adjustment device. The cutting zone in metal cutting is placed within the jet field 4. The jetting device 1 injects cooling gas into the jet field 4, forming a Mach disk within it, thereby cooling the metal cutting zone. The parameter adjustment device adjusts various parameters during the gas jetting process of the jetting device 1, ensuring that the diameter of the Mach disk formed at the end of the jet field 4 covers the higher-temperature areas of the metal cutting zone. The data acquisition device collects various parameters during the gas jet cooling process.

[0115] The PLC feedback controller is connected to the injection device 1, the parameter adjustment device, and the data acquisition device. The PLC feedback controller receives data collected by the data acquisition device and uses this data to control the parameter adjustment device on various parameters of the injection device 1 during the injection of cooling gas. In this embodiment, the main parameter data received by the PLC feedback controller includes the diameter of the nozzle 13. d n The gas pressure ejected at the inlet of nozzle 13 P The stagnation temperature and stagnation pressure of the cooling gas at the end of the Mach disk formed in the jet field 4 are measured by the temperature and pressure controller.

[0116] The gas jet cooling device may also include a slide table 7, and the jetting device 1 is equipped with a slide plate 14. The nozzle changing device 12 is fixedly installed on the slide plate 14, and the slide plate 14 is slidably installed on the slide table 7. A displacement sensor is installed on the slide table 7 to detect the distance the slide plate 14 moves on the slide table 7. The displacement sensor is connected to a PLC feedback controller, which receives the data from the displacement sensor and displays it on the control panel for easy observation by the operator. The distance between the nozzle 13 and the acquisition device is adjusted by sliding the slide plate 14, thereby providing a specific adjustment method for maintaining a 3mm distance between the surface of the high-precision slide table 7 and the temperature and pressure sensor 51 in step (1) of embodiment 2.

[0117] Furthermore, before adjusting the parameters of the gas jet cooling device, the device itself needs to be adjusted so that the position of the nozzle 13 on the nozzle changing device 12 is adjusted so that the central axis of the high-pressure jet ejected by the nozzle 13 is aligned with the center of the temperature and pressure sensor 51. This alignment ensures that the temperature and pressure sensor receives a uniform gas jet. When adjusting the sliding plate 14, the adjustment range between the nozzle 13 and the temperature and pressure sensor 51 is 0mm to 3mm.

[0118] Please refer to Figure 2 The injection device 1 includes a gas delivery pipe 11, a nozzle changing device 12, and a nozzle 13. One end of the nozzle changing device 12 is connected to the gas delivery pipe 11, and the other end is connected to the nozzle 13. The gas delivery pipe 11 is used to deliver compressed gas to the nozzle 13 through the nozzle changing device 12. The nozzle 13 is used to inject cooling gas into the jet field 4, and the injected gas forms a Mach disk in the jet field 4 to cool the metal cutting area placed in the jet field 4.

[0119] Please refer to Figure 3 In this embodiment, the portion of the gas delivery pipeline 11 connecting the nozzle replacement device 12 and the mass flow controller 2 can be connected using an insulated flexible pipe, and the length of this insulated flexible pipe is greater than the length between the nozzle replacement device 12 and the mass flow controller 2. This ensures that when the nozzle replacement device 12 slides on the slide table 7 via the slide plate 14, the insulated flexible pipe can still deliver compressed gas, and the movement of the nozzle replacement device 12 will not affect the pipeline between the mass flow controller 2 and the control valve 8, thereby ensuring the accuracy of the data measured by the mass flow controller 2 and the pressure regulating valve 3.

[0120] In this embodiment, the nozzle changing device 12 is a circular structure that can rotate. In practical applications, nozzles 13 of different sizes can be installed in different slots, and then the appropriate nozzle 13 can be selected according to actual needs.

[0121] Understandably, a nozzle 13 protective cover is also provided on the outside of the nozzle 13. The nozzle 13 protective cover is fitted on the outside of the nozzle 13 to protect the nozzle 13.

[0122] The parameter adjustment device includes a mass flow controller 2, a pressure setpoint valve 3, and a control valve 8. The control valve 8 is installed at the inlet of the gas delivery pipeline 11 and is used to control the opening and closing of the gas delivery pipeline 11. The pressure setpoint valve 3 is installed on the gas delivery pipeline 11 and positioned between the control valve 8 and the nozzle replacement device 12. The pressure setpoint valve 3 is used to adjust the pressure of the cooling gas entering the nozzle 13 on the gas delivery pipeline 11. In actual parameter adjustment, the stagnation pressure at the end of the Mach disk formed after the gas jet cooling is related to the pressure of the cooling gas ejected from the nozzle 13. Therefore, in actual control, to adjust the stagnation pressure at the end of the formed Mach disk, it is only necessary to adjust the pressure of the cooling gas entering the nozzle 13 on the gas delivery pipeline 11 through the pressure setpoint valve 3. The mass flow controller 2 is installed on the gas delivery pipeline 11 and positioned between the pressure setpoint valve 3 and the nozzle replacement device 12. The mass flow controller 2 is used to control the mass flow rate of the gas on the gas delivery pipeline 11. In actual control, the pressure of the cooling gas in the gas delivery pipeline 11 is first adjusted, and then the amount of gas ejected from the nozzle 13 is adjusted by regulating the mass flow controller 2 to achieve the stagnation temperature at the end of the formed Mach disk. By using the stagnation temperature to feed back and regulate the mass flow rate of the gas, it is possible to achieve rapid and uniform cooling of the metal cutting zone while reducing the amount of cooling gas emitted, thereby achieving the goal of energy saving and emission reduction.

[0123] The PLC feedback controller is connected to the mass flow controller 2, the pressure regulating valve 3, and the control valve 8, respectively, so that the display panel of the PLC feedback controller can display this series of data, providing data reference for subsequent parameter adjustment operations.

[0124] The data acquisition device includes a high-speed camera 6, a temperature and pressure sensor 51, a sensor mounting device 9, and a signal acquisition card 5. The high-speed camera 6 is positioned perpendicular to the central axis of the slide table 7, facing the jet field 4. The high-speed camera 6 is used to acquire the distance between the end position of the actually formed Mach disk and the nozzle 13, as well as the diameter of the end position of the Mach disk. Using the high-speed camera 6 allows for rapid, multiple sampling of high-speed targets in a very short time. When the reaction is at a normal speed, the recorded change process of the target will be clearly and slowly presented to us. Therefore, in this embodiment, the high-speed camera 6 can clearly capture the formation of the Mach disk, the distance between the end position of the formed Mach disk and the nozzle 13, and the diameter of the end position of the Mach disk. The temperature and pressure sensor 51 is mounted on the sensor mounting device 9 and connected to the signal acquisition card 5, which is positioned on the side of the high-speed camera 6 away from the nozzle 13. The signal acquisition card 5 is connected to a PLC feedback controller to transmit the acquired data to the PLC controller. The sensor fixing device 9 is mounted on the central axis of the slide table 7. The temperature and pressure sensor 51 faces the nozzle 13 and is used to measure the stagnation temperature and stagnation pressure at the end of the Mach disk formed after the gas is ejected from the nozzle 13. The high-speed camera 6 is used to measure the diameter of the end of the Mach disk formed by the gas ejected from the injection device 1 and the distance between the end of the Mach disk and the nozzle 13.

[0125] Preferably, the high-speed camera 6 and the nozzle 13 are at the same height in the vertical direction of the jet field 4, which makes it easy to clearly capture the Mach disk formed after the cooling gas is ejected and some parameters of the formed Mach disk.

[0126] The center of the cooling gas ejected from nozzle 13 at the end of the Mach disk formed by the jet field 4 coincides with the center of the temperature and pressure sensor 51. This allows the temperature and pressure sensor 51 to accurately measure the stagnation temperature and stagnation pressure at the end of the Mach disk, improving the accuracy of the measurement.

[0127] The basic principles, main features, and advantages of this invention have been described above. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection claimed by this invention is defined by the appended claims and their equivalents.

Claims

1. A parameterized control method for gas jet cooling of the metal cutting zone, characterized in that, It includes the following steps: (1) Connect the gas jet cooling device to the PLC feedback controller, and construct the distance between the end position of the Mach disk formed after the cooling gas is injected from the gas jet cooling device and the cooling gas outlet in the PLC feedback controller. L M and the diameter at the end of the Mach disk d M The computational model is expressed as follows: （1） （2） （3） in, k This is the proportionality coefficient. d n The diameter of the nozzle in the gas jet cooling device; P 0 represents the stagnation pressure in the gas jet cooling device; For environmental pressure, α This is an empirical coefficient. γ For specific heat ratio, c P For isobaric specific heat capacity, c V Specific heat capacity at constant volume; (2) Determine the diameter of the end position of the Mach disk required to cover the heat source based on the size of the heat-generating area in the metal cutting zone. d M The Mach disk is formed by the gas ejected from the gas jet cooling device; (3) The gas jet cooling device is initially set to have a diameter of d M The front jet parameters, wherein the pressure of the gas ejected during the jet is... P The nozzle diameter is d n mass flow rate is And open the control valve in the gas jet cooling device; (4) Adjust the actual pressure of the gas jet by using the pressure stabilizing valve to control its pressure value to be stable at the set pressure. P The actual mass flow rate of the gas jet is adjusted by a mass flow controller to stabilize the mass flow rate at the set value. ; (5) The distance between the end position of the Mach disk actually formed after the cooling gas injection and the cooling gas outlet is measured by a high-speed camera under the parameters set in step (3). L M,0 And the diameter of the end position of the actually formed Mach disk d M,0 ; (6) The actual stagnation pressure at the end of the Mach disk was measured by a temperature and pressure sensor. P M,0 The distance between the end position of the Mach disk and the cooling gas outlet is calculated based on the front-end parameters set in step (3). L M and the diameter at the end of the Mach disk d M coefficients in the calculation model k as well as α ; (7) Define variables i and initialize i =1; (8) The PLC feedback controller obtains the first i The diameter of the end position of the Mach disk measured in this study is: d M,i And the diameter of the Mach disk at the end position that is expected to cover the heat generation area of ​​the metal cutting zone. d M The difference is calculated, and the control precision is set to Δ. d ,Will d M,i - d M With Δ d Make comparisons; when d M,i - d M <0, or d M,i > d M and d M,i - d M >Δ d If so, then proceed to step (9); when step d M,i > d M and d M,i - d M <Δ d If so, then proceed to step (11); (9) Based on the calculation model of the distance between the end position of the Mach disk and the cooling gas outlet and the diameter of the end position of the Mach disk in step (1), and combined with the coefficients of the calculation model in step (6), k as well as α To adjust the pressure P or nozzle d n To change the diameter of the end of the Mach disk so that the diameter of the end of the Mach disk meets the condition of step (8); (10) will i The value of +1 is assigned to i and return to step (8); (11) The PLC feedback controller obtains the parameters finally obtained in step (9), including the actual pressure at the nozzle inlet at this time. P Nozzle size d n Therefore, the coefficients obtained from step (6) are combined with this. k To calculate the distance between the end position of the Mach disk and the cooling gas outlet at this point. L M,i The distance between the end position of the Mach disk and the cooling gas outlet is calculated using temperature and pressure sensors. L M,i At that time, the stagnation temperature at the end of the Mach disk T M,0 ; (12) Define variables j and initialize j =1; (13) The temperature sensor measured the first j The stagnation temperature at the end of the Mach disc measured in this second measurement. T M,j and the desired stagnation temperature T M The difference is calculated, and the control precision is set to Δ. T ,Will T M －T M,j With Δ T In comparison, if T M,j > T M ,or T M > T M,j and T M - T M,j >Δ T If so, proceed to step (14); T M > T M,j and T M - T M,j <Δ T Then proceed to step (16). (14) Increasing the mass flow rate of the gas jet cooling device jet by means of a mass flow controller. This is to reduce the stagnation temperature of the gas jet at the end of the Mach disk. (15) will j The value of +1 is assigned to j and return to step (13); (16) The PLC feedback controller obtains the front-end parameters of the adjusted Mach disk: the actual pressure at the nozzle inlet. P Nozzle size d n and the mass flow rate of the regulated gas ; and the distance between the actual end of the formed Mach disk and the cooling gas outlet. L M The diameter at the end of the Mach disk d M And the actual stagnation temperature at the end of the Mach disk. T M The adjusted parameters are then applied to the cooling of the actual metal cutting zone.

2. The parameterized control method for gas jet cooling of the metal cutting zone as described in claim 1, characterized in that, The Δ d The numerical range is d M Between 5% and 20%; And / or, the Δ T The numerical range is T M Between 5% and 20%.

3. The parameterized control method for gas jet cooling of the metal cutting zone as described in claim 1, characterized in that, The Δ d The value is d M 5%; And / or, the Δ T The value is T M 5%.

4. A parametric control system for gas jet cooling of a metal cutting zone, wherein the system is controlled by the parametric control method for gas jet cooling of a metal cutting zone as described in any one of claims 1-3, characterized in that, The parameterized control system for gas jet cooling of the metal cutting zone includes: A gas jet cooling device includes a jetting device (1), a parameter adjustment device, and a collection device. The jetting device (1) is mounted on the parameter adjustment device, and the collection device is located on one side of the parameter adjustment device. The gas jetted by the jetting device (1) forms a jet field (4) between the collection device and the parameter adjustment device. The cutting zone in metal cutting is placed in the jet field (4). The jetting device (1) is used to jet cooling gas into the jet field (4) and form a Mach disk in the jet field (4) to cool the metal cutting zone. The parameter adjustment device is used to adjust various parameters during the jetting process of the jetting device (1) to ensure that the diameter of the end of the Mach disk formed by the jetting device (1) in the jet field (4) can cover the heat-generating area in the metal cutting zone. The collection device is used to collect various parameters during the gas jet cooling process. The PLC feedback controller is connected to the injection device (1), the parameter adjustment device and the acquisition device respectively. The PLC feedback controller is used to receive the data collected by the acquisition device and to control the parameter adjustment device to adjust various parameters of the injection device (1) during the injection of cooling gas.

5. The parameterized control system for gas jet cooling of the metal cutting zone as described in claim 4, characterized in that, The injection device (1) includes a gas delivery pipe (11), a nozzle replacement device (12), and a nozzle (13). One end of the nozzle replacement device (12) is connected to the gas delivery pipe (11), and the other end of the nozzle replacement device (12) is connected to the nozzle (13). The gas delivery pipe (11) is used to deliver compressed gas to the nozzle (13) through the nozzle replacement device (12). The nozzle (13) is used to inject cooling gas into the jet field (4). The injected gas forms a Mach disk in the jet field (4) to cool the metal cutting area placed in the jet field (4).

6. The parameterized control system for gas jet cooling of the metal cutting zone as described in claim 5, characterized in that, The parameter adjustment device includes a mass flow controller (2), a pressure setpoint valve (3), and a control valve (8). The control valve (8) is installed at the inlet of the gas delivery pipeline (11) and is used to control the opening and closing of the gas delivery pipeline (11). The pressure setpoint valve (3) is installed on the gas delivery pipeline (11) and is located between the control valve (8) and the nozzle replacement device (12). The pressure setpoint valve (3) is used to adjust the pressure of the cooling gas entering the nozzle (13) on the gas delivery pipeline (11). The mass flow controller (2) is installed on the gas delivery pipeline (11) and is located between the pressure setpoint valve (3) and the nozzle replacement device (12). The mass flow controller (2) is used to control the mass flow rate of the gas on the gas delivery pipeline (11).

7. The parameterized control system for gas jet cooling of the metal cutting zone as described in claim 5, characterized in that, The gas jet cooling device also includes a slide table (7), the jetting device (1) is provided with a slide plate (14), the nozzle replacement device (12) is fixedly installed on the slide plate (14), the slide plate (14) is slidably installed on the slide table (7), and the distance between the nozzle (13) and the collection device is adjusted by sliding the slide plate (14).

8. The parameterized control system for gas jet cooling of the metal cutting zone as described in claim 7, characterized in that, The acquisition device includes a high-speed camera (6), a temperature and pressure sensor (51), a sensor fixing device (9), and a signal acquisition card (5); the high-speed camera (6) is set vertically along the central axis of the slide (7), and the high-speed camera (6) faces the jet field (4); the temperature and pressure sensor (51) is mounted on the sensor fixing device (9) and connected to the signal acquisition card (5), and the signal acquisition card (5) is set on the side of the high-speed camera (6) away from the nozzle (13); the sensor fixing device (9) is set on the central axis of the slide (7), and the temperature and pressure sensor (51) faces the nozzle (13). The temperature and pressure sensor (51) is used to measure the stagnation temperature and stagnation pressure at the end of the Mach disk formed after the gas is ejected from the nozzle (13); the high-speed camera (6) is used to measure the diameter of the end of the Mach disk formed by the gas ejected by the jetting device (1) and the distance between the end of the Mach disk and the nozzle (13).

9. The parameterized control system for gas jet cooling of the metal cutting zone as described in claim 8, characterized in that, The high-speed camera (6) and the nozzle (13) are at the same height in the vertical direction of the jet field (4); And / or, the center of the cooling gas ejected from the nozzle (13) at the end of the Mach disk formed by the jet field (4) coincides with the center of the temperature and pressure sensor (51).

10. The parameterized control system for gas jet cooling of the metal cutting zone as described in claim 8, characterized in that, The distance between the nozzle (13) and the temperature and pressure sensor (51) is 0mm to 3mm.

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