A method and system for spinning control of a magnesium alloy hot rotary three-wheel power spinning machine

Abstract

The present application relates to the technical field of spinning machine, especially to a magnesium alloy hot spinning three-wheel powerful spinning machine spinning control method and system, the method comprises the following steps: workpiece installation in place, start heating mechanism and oxidation protection mechanism, reach temperature target value after heat preservation; Spindle mechanism rotation, hot spinning three-wheel powerful spinning machine gradually press to workpiece, pressure sensor real-time collection radial cylinder load force information, temperature sensor real-time collection workpiece surface actual temperature information, displacement sensor real-time collection radial cylinder piston rod radial displacement information; Real-time calculation servo valve opening, intermediate frequency furnace heating compensation power, the flow required by oxidation protection mechanism inert gas; And control according to the calculated value, unload workpiece after reaching the target spinning pressure. The method and system provided by the present application can realize high-temperature accurate heating and oxidation protection of the workpiece, and the production efficiency and the yield are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of spinning machine technology, and in particular to a spinning control method and system for a magnesium alloy hot spinning three-wheel high-power spinning machine. Background Technology

[0002] Magnesium alloys, as the lightest engineering metal materials currently available, possess advantages such as low density, high specific strength, and good vibration damping properties, leading to increasing application demands in many fields, including automotive manufacturing and electronic communications. However, magnesium alloys exhibit poor plasticity at room temperature and are prone to cracking, making it difficult to form complex parts using conventional cold spinning processes. Furthermore, their susceptibility to oxidation and grain growth at high temperatures places extremely high demands on temperature control and pressure regulation during the spinning process.

[0003] Existing spinning equipment has the following shortcomings:

[0004] 1. Inappropriate heating method: The heating method is mostly based on the overall furnace heating or local flame heating. The former has poor temperature uniformity, while the latter is prone to local overheating and cannot monitor the temperature change of magnesium alloy workpieces in real time.

[0005] 2. Insufficient control precision: There is a lack of a multi-parameter coordinated control mechanism for "temperature-pressure-speed" during the hot spinning process of magnesium alloys, making it difficult to match the plasticity change law of magnesium alloys in different temperature ranges, resulting in low yield.

[0006] 3. Lack of oxidation protection: The existing equipment is not equipped with a dedicated protective device. During high-temperature spinning, a loose oxide layer is easily formed on the surface of magnesium alloy, which affects the surface quality of the workpiece. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a spinning control method and system for a magnesium alloy hot spinning three-wheel high-power spinning machine, which can realize high-temperature precise heating of difficult-to-deform workpieces such as magnesium alloys and titanium alloys, inert protective gas flow control and multi-parameter collaborative control, and significantly improve production efficiency and yield.

[0008] This invention is achieved through the following scheme:

[0009] A method for controlling the spinning process of a magnesium alloy hot spinning three-wheel high-power spinning machine includes the following steps:

[0010] S1: Fix the workpiece in the spindle chuck and tighten it with the tail jack mechanism, start the heating mechanism and oxidation protection mechanism, and maintain the temperature after reaching the target temperature value;

[0011] S2: The main spindle mechanism rotates at the preset spindle speed. The hot spinning three-wheel high-power spinning machine feeds synchronously in the horizontal and radial directions and presses the workpiece step by step. The pressure sensor collects the load force information of the radial cylinder in the hot spinning three-wheel high-power spinning machine in real time. The temperature sensor collects the actual temperature information of the workpiece surface in real time. The displacement sensor collects the radial displacement information of the radial cylinder piston rod in the hot spinning three-wheel high-power spinning machine in real time.

[0012] S3: The PLC calculates the servo valve opening in real time based on the radial displacement information of the piston rod, and controls the servo valve in real time according to the calculated servo valve opening.

[0013] S4: The PLC calculates the heating compensation power in real time according to the formula (4) based on the actual temperature information of the workpiece surface, the load force information of the radial cylinder and the radial displacement information of the piston rod, and controls the heating mechanism to perform dynamic temperature compensation according to the heating compensation power.

[0014] (4);

[0015] in: Indicates heating compensation power. Indicates the total heat loss coefficient. Indicates the diameter of the workpiece. This indicates the radial displacement of the piston rod of the radial hydraulic cylinder. Indicates the length of the workpiece. This indicates the actual surface temperature of the workpiece. Indicates ambient temperature. Indicates the coefficient of friction of the workpiece. Indicates the radial cylinder load force. Indicates the spindle speed;

[0016] S5: The PLC calculates the required flow rate of inert gas for the oxidation protection mechanism in real time based on the radial cylinder load force information, and controls the output flow rate of inert gas for the oxidation protection mechanism according to the required flow rate.

[0017] S6: After reaching the target spindle pressure, shut off the heating mechanism, maintain the inert gas supply to the oxidation protection mechanism, and when the temperature of the workpiece to be processed drops below 200℃, shut off the spindle mechanism and oxidation protection mechanism, loosen the spindle chuck and tailstock mechanism, and unload the workpiece.

[0018] The optimized target temperature value in step S1 is between 300°C and 400°C.

[0019] The optimized spindle speed in step S2 is preset to be between 50 r / min and 300 r / min.

[0020] The optimized target spinning force in step S6 is between 5 kN and 250 kN.

[0021] Furthermore, the PLC calculates the radial oil supply flow rate of the radial cylinder based on the radial displacement information of the radial cylinder piston rod according to the oil supply flow rate model (1), and then calculates the servo valve opening degree according to the relationship between the radial oil supply flow rate and the servo valve flow rate (2) and the servo valve flow control model (3). The PLC controls the servo valve to operate according to the calculated servo valve opening degree.

[0022] (1);

[0023] (2);

[0024] (3);

[0025] in: Indicates the radial oil supply flow rate of the hydraulic cylinder. This represents the effective area of ​​the radial cylinder piston. This indicates the radial displacement of the piston rod of the radial hydraulic cylinder. Indicates time, This represents the internal leakage coefficient of the radial hydraulic cylinder. Indicates load voltage drop. This represents the total volume of the two oil chambers in the radial hydraulic cylinder. This represents the equivalent bulk modulus of elasticity of the oil. Indicates the servo valve flow rate. Indicates the flow coefficient of the servo valve. Indicates the valve opening degree of the servo valve. This indicates the maximum effective throttling area of ​​the servo valve orifice. Indicates the density of hydraulic oil. This indicates the pressure difference between the inlet and outlet of the servo valve.

[0026] Furthermore, in step S5, the PLC calculates the required inert gas flow rate for the oxidation protection mechanism in real time based on the inert gas flow control model (5):

[0027] (5);

[0028] in: This indicates the flow rate of inert gas required for the oxidation protection mechanism. This indicates the initial inert gas flow rate of the oxidation protection mechanism. This represents the thermal rotation constant of magnesium alloys. This indicates the radial cylinder load force.

[0029] A magnesium alloy hot-spinning three-wheel high-power spinning machine system includes a bed platform, a spindle mechanism, a tailstock mechanism, a hot-spinning three-wheel high-power spinning machine, a heating mechanism, an oxidation protection mechanism, a PLC, a pressure sensor, a temperature sensor, and a displacement sensor. The spindle mechanism includes a spindle mounting bracket, a spindle, a spindle motor, and a spindle chuck. The spindle mounting bracket is fixedly mounted on the bed platform, and the spindle motor is fixedly mounted on the spindle mounting bracket to drive the spindle rotation. The spindle chuck is mounted at the end of the spindle. The tailstock mechanism is slidably mounted on the bed platform and driven by the tailstock motor to slide along the bed platform. The hot-spinning three-wheel high-power spinning machine includes a spinning machine frame, a transmission unit, three slides, and three... The spinning frame is slidably mounted on the bed platform and driven by the transmission unit to slide along the bed platform. Three rams are slidably mounted on the spinning frame. The three spinning wheels are fixedly mounted at the ends of the corresponding rams and are evenly distributed. The three spinning wheels are driven by a radial cylinder to move radially. The pressure sensor is mounted on the radial cylinder. The temperature sensor is mounted on the spinning frame. The displacement sensor is mounted between the rams and the spinning frame. The pressure sensor, temperature sensor, and displacement sensor are respectively connected to a PLC. The heating mechanism heats the surface of the workpiece. The oxidation protection mechanism blows inert gas into the surface of the workpiece for oxidation protection.

[0030] Furthermore, the oxidation protection mechanism includes an argon generator and multiple nozzles. The multiple nozzles are connected to the argon generator via argon pipelines. A flow regulating valve is installed on the argon pipelines. The heating mechanism includes an intermediate frequency furnace and a thermocouple. The intermediate frequency furnace and the thermocouple are connected via a thermal pipeline. The intermediate frequency furnace and the argon generator are both fixedly mounted on a base. The base, the argon pipeline, and the thermal pipeline are all fixedly connected to the spinning machine frame.

[0031] The optimized transmission unit includes a lead screw, a lead screw motor, and a nut sleeve fixedly mounted on the spinning machine frame. The lead screw is mounted on the bed platform and driven to rotate by the lead screw motor, and the nut sleeve is fitted onto the lead screw.

[0032] Beneficial effects of the invention:

[0033] The present invention provides a spinning control method and system for a magnesium alloy hot spinning three-wheel high-power spinning machine, which has the following advantages:

[0034] 1. High forming quality: The three-wheel spinning structure ensures uniform stress on the workpiece and small deviation in the finished product wall thickness. The heating system has a dynamic compensation mechanism based on the coupling relationship between rotation speed, radial pressure, and workpiece temperature, which enables precise control of the workpiece surface temperature. This meets the high-precision hot working requirements of difficult-to-deform materials such as high-temperature alloys and magnesium alloys, avoids overheating or insufficient plasticity of magnesium alloys, and significantly improves the yield.

[0035] 2. High production efficiency: Three-wheel synchronous spinning reduces the number of processing steps, significantly improving production efficiency compared to traditional two-wheel or single-wheel hot spinning.

[0036] 3. Excellent surface quality: By establishing an inert gas flow control model that establishes the relationship between radial spinning pressure and inert gas flow rate, the oxidation reaction during the spinning process of magnesium alloy can be effectively suppressed, ultimately significantly improving the surface quality of the workpiece. No additional subsequent polishing treatment is required, further improving processing efficiency.

[0037] 4. High versatility: By adjusting the spinning process parameters, it can be adapted to magnesium alloy cylindrical, conical and other workpieces with diameters of 50-300mm and lengths of 100-500mm, and has a wide range of applications. Attached Figure Description

[0038] Figure 1 This is a top view of the structure of the present invention.

[0039] Figure 2 This is a side view of the structure of the present invention.

[0040] In the diagram: 1. Spindle mechanism; 101. Spindle mounting bracket; 102. Spindle motor; 103. Spindle; 104. Spindle chuck; 2. Bed platform; 3. Hot spinning three-wheel high-power spinning machine; 301. Spinning machine frame; 302. Radial cylinder; 303. Spinning wheel; 304. Slide ram; 305. Nut sleeve; 306. Lead screw; 307. Lead screw motor; 4. Tail-end mechanism; 401. Tail-end motor; 5. Heating mechanism; 501. Medium frequency furnace; 502. Thermal pipeline; 503. Thermocouple; 6. Oxidation protection mechanism; 601. Argon generator; 602. Argon pipeline; 603. Jet nozzle; 7. Base. Detailed Implementation

[0041] A method for controlling the spinning process of a magnesium alloy hot spinning three-wheel high-power spinning machine, specifically including the following steps:

[0042] S1: Fix the workpiece to the spindle chuck and tighten it with the tail jack mechanism. Start the heating mechanism and oxidation protection mechanism. After reaching the target temperature value, keep it warm to ensure uniform internal temperature of the workpiece. Specifically, the target temperature value can be between 300℃ and 400℃, preferably 350℃.

[0043] Specifically, the initial clamped workpiece is preferably a magnesium alloy AZ31B blank with an outer diameter of 100mm, an inner diameter of 80mm, and a length of 200mm. The target finished product has an outer diameter of 90mm, an inner diameter of 88mm, and a length of 250mm.

[0044] S2: The main spindle mechanism rotates at the preset spindle speed. The hot spinning three-wheel high-power spinning machine feeds synchronously in the horizontal and radial directions and presses the workpiece step by step. The pressure sensor collects the load force information of the radial cylinder in the hot spinning three-wheel high-power spinning machine in real time. The temperature sensor collects the actual temperature information of the workpiece surface in real time. The displacement sensor collects the radial displacement information of the radial cylinder piston rod in the hot spinning three-wheel high-power spinning machine in real time.

[0045] Specifically, the preset spindle speed can be between 50 r / min and 300 r / min, and is preferably 150 r / min.

[0046] The feed speed of the hot spinning three-wheel high-power spinning machine in the horizontal direction can be between 1 mm / s and 5 mm / s, and the feed speed in the radial direction can be between 0.1 mm / s and 1 mm / s.

[0047] S3: The PLC calculates the servo valve opening in real time based on the radial displacement information of the piston rod, and controls the servo valve in real time according to the calculated servo valve opening.

[0048] Specifically, the PLC first calculates the radial oil cylinder supply flow rate based on the radial displacement information of the radial cylinder piston rod according to the oil cylinder supply flow rate model (1). Since the radial oil cylinder supply flow rate is equal to the servo valve flow rate, the PLC then calculates the servo valve opening degree according to the relationship between the radial oil cylinder supply flow rate and the servo valve flow rate (2) and the servo valve flow control model (3). Then, the PLC controls the servo valve to operate according to the calculated servo valve opening degree.

[0049] (1);

[0050] (2);

[0051] (3);

[0052] in: Indicates the radial oil supply flow rate of the hydraulic cylinder. This represents the effective area of ​​the radial cylinder piston. This indicates the radial displacement of the piston rod of the radial hydraulic cylinder. Indicates time, This represents the internal leakage coefficient of the radial hydraulic cylinder. Indicates load voltage drop. This represents the total volume of the two oil chambers of the radial hydraulic cylinder. This represents the equivalent bulk modulus of elasticity of the oil. Indicates the servo valve flow rate. This indicates the flow coefficient of the servo valve. Indicates the valve opening degree of the servo valve. This indicates the maximum effective throttling area of ​​the servo valve orifice. Indicates the density of hydraulic oil. This indicates the pressure difference between the inlet and outlet of the servo valve.

[0053] By using the above method to control the opening of the servo valve in real time, precise control of radial displacement can be achieved.

[0054] S4: The PLC calculates the heating compensation power in real time based on the actual surface temperature of the workpiece, the load force of the radial cylinder, and the radial displacement of the piston rod, and controls the heating mechanism to perform dynamic temperature compensation according to the heating compensation power.

[0055] First, the linear velocity of the workpiece rotation is: ,in This represents the linear velocity of the workpiece's rotation. Indicates the diameter of the workpiece. Indicates the spindle speed;

[0056] The rotating workpiece does work by contacting the surface of the spinning wheel; friction generates heat, and all energy is absorbed by the workpiece. The work done by the spinning wheel is... ,in: This indicates the power generated by friction between the workpiece and the spinning wheel. Indicates the coefficient of friction of the workpiece. Indicates the radial cylinder load force;

[0057] The heat loss of cylindrical workpieces includes convective heat dissipation (air convection) and radiative heat dissipation (which cannot be ignored at high temperatures), and can be simplified into a linear model that is proportional to the temperature difference and the heat dissipation surface area: ,

[0058] in, This represents the total heat loss power of the workpiece. This is the total heat loss coefficient, which includes both convective and radiative losses; This refers to the heat dissipation surface area of ​​the workpiece (cylindrical side area). The actual temperature of the workpiece. Ambient temperature;

[0059] in: , The length of the workpiece;

[0060] Based on the heat balance and heating compensation power equation Then the heating compensation power can be calculated. For equation (4):

[0061] (4);

[0062] in: Indicates heating compensation power. Indicates the total heat loss coefficient. Indicates the diameter of the workpiece. This indicates the radial displacement of the piston rod of the radial hydraulic cylinder. Indicates the length of the workpiece. This indicates the actual surface temperature of the workpiece. Indicates ambient temperature. Indicates the coefficient of friction of the workpiece. Indicates the radial cylinder load force. This indicates the spindle speed.

[0063] By using the above method for dynamic temperature supplementation control, a control accuracy of ±2℃ for the workpiece surface temperature can be achieved, meeting the high-precision hot working process requirements of difficult-to-deform materials such as high-temperature alloys and magnesium alloys.

[0064] S5: The PLC calculates the required flow rate of inert gas for the oxidation protection mechanism in real time based on the radial cylinder load force information, and controls the output of inert gas for the oxidation protection mechanism according to the required flow rate. Argon can be used as the inert gas here.

[0065] Specifically, the PLC can calculate the required inert gas flow rate of the oxidation protection mechanism in real time based on the inert gas flow control model (5):

[0066] (5);

[0067] in: This indicates the flow rate of inert gas required for the oxidation protection mechanism. This indicates the initial inert gas flow rate of the oxidation protection mechanism. This represents the thermal rotation constant of magnesium alloys. This indicates the radial cylinder load force.

[0068] By controlling the flow rate of inert gas using the above method, sufficient flow of inert gas can be ensured under different conditions, thereby effectively suppressing the oxidation problem on the surface of magnesium alloys under high-temperature spinning.

[0069] The flow rate of the inert gas can be adjusted from 5 L / min to 20 L / min.

[0070] S6: After reaching the target spindle pressure, shut off the heating mechanism, maintain the inert gas supply to the oxidation protection mechanism, and when the temperature of the workpiece to be processed drops below 200℃, shut off the spindle mechanism and oxidation protection mechanism, loosen the spindle chuck and tailstock mechanism, and unload the workpiece.

[0071] Specifically, the target spinning force can be between 5 kN and 250 kN.

[0072] This invention provides a spinning control method for a three-wheel high-power hot spinning machine for magnesium alloys. The three-wheel spinning structure ensures uniform stress on the workpiece, resulting in minimal deviation in finished product wall thickness. The heating system employs a dynamic temperature compensation mechanism based on the coupling relationship between rotational speed, radial pressure, and workpiece temperature, achieving precise control of the workpiece surface temperature. This meets the high-precision hot processing requirements of difficult-to-deform materials such as high-temperature alloys and magnesium alloys, preventing overheating or insufficient plasticity in magnesium alloys, significantly improving yield and forming quality. Furthermore, the simultaneous three-wheel spinning reduces the number of processing steps, significantly increasing production efficiency compared to traditional two-wheel or single-wheel hot spinning.

[0073] In addition, by establishing an inert gas flow control model that establishes the relationship between radial spinning pressure and inert gas flow rate, the oxidation reaction during the spinning process of magnesium alloy can be effectively suppressed, ultimately resulting in a significant improvement in the surface quality of the workpiece. No additional polishing is required, further improving processing efficiency.

[0074] Furthermore, by adjusting the spinning process parameters, this invention can be adapted to magnesium alloy cylindrical and conical workpieces with diameters of 50-300mm and lengths of 100-500mm, making it widely applicable.

[0075] A high-power hot spinning three-wheel spinning machine system for magnesium alloys is shown in the schematic diagram below. Figure 1 , Figure 2 As shown, it includes a bed platform 2, a spindle mechanism 1, a tailstock mechanism 4, a three-wheeled hot spinning press 3, a heating mechanism 5, an oxidation protection mechanism 6, a PLC, a pressure sensor, a temperature sensor, and a displacement sensor. The spindle mechanism includes a spindle mounting bracket 101, a spindle 103, a spindle motor 102, and a spindle chuck 104. The spindle mounting bracket is fixedly mounted on the bed platform, and the spindle motor is fixedly mounted on the spindle mounting bracket to drive the spindle to rotate. The spindle chuck is mounted on the end of the spindle. The tailstock mechanism is slidably mounted on the bed platform and driven by the tailstock motor 401 to slide along the bed platform. The three-wheeled hot spinning press includes a spinning machine frame 301, a transmission unit, and three slides 30. 4. Three spinning rollers 303 are included. The spinning frame is slidably mounted on the bed platform and driven by the transmission unit to slide along the bed platform. The three rams are slidably mounted on the spinning frame. The three spinning rollers are fixedly mounted on the ends of the corresponding rams and are evenly distributed. The three spinning rollers are driven to move radially by the radial cylinder 302. The pressure sensor is mounted on the radial cylinder. The temperature sensor is mounted on the spinning frame. The displacement sensor is mounted between the rams and the spinning frame. The pressure sensor, temperature sensor, and displacement sensor are respectively connected to the PLC. The heating mechanism heats the surface of the workpiece. The oxidation protection mechanism blows inert gas into the surface of the workpiece for oxidation protection.

[0076] Furthermore, the oxidation protection mechanism includes an argon generator 601 and multiple nozzles 603. The multiple nozzles are connected to the argon generator via argon pipelines 602. A flow regulating valve (not shown) is installed on the argon pipeline. The heating mechanism includes an intermediate frequency furnace 501 and a thermocouple 503. The intermediate frequency furnace and the thermocouple are connected via a heat pipe 502. The intermediate frequency furnace and the argon generator are both fixedly mounted on the base 7. The base, the argon pipeline, and the heat pipe are all fixedly connected to the spinning frame.

[0077] An insulation cover can be installed on the spinning machine frame to surround the thermocouple and the air nozzle. The thermocouple is equivalent to a temperature sensor with a measurement range of 200-450℃. The medium frequency furnace and argon generator are fixedly installed on the base. The base, argon pipeline, and heating pipeline are all fixedly connected to the spinning machine frame. When the spinning machine frame moves along the bed platform, the heating mechanism and oxidation protection mechanism can move together, which facilitates the heating and oxidation protection of the workpiece. It is also highly adaptable and can be used for various types of workpieces.

[0078] The optimized transmission unit includes a lead screw 306, a lead screw motor 307, and a nut sleeve 305 fixedly mounted on the spinning machine frame. The lead screw is mounted on the machine bed platform and driven to rotate by the lead screw motor, and the nut sleeve is fitted onto the lead screw. The use of lead screw transmission makes the transmission of the hot spinning three-wheel high-power spinning machine more stable and reliable.

[0079] In summary, the present invention proposes a spinning control method and system for a magnesium alloy hot spinning three-wheel high-power spinning machine, which can achieve high-temperature precise heating of difficult-to-deform workpieces such as magnesium alloys and titanium alloys, inert protective gas flow control and multi-parameter collaborative control, significantly improving production efficiency and yield.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for controlling the spinning process of a magnesium alloy hot spinning three-wheel high-power spinning machine, characterized in that: Includes the following steps: S1: Fix the workpiece in the spindle chuck and tighten it with the tail jack mechanism, start the heating mechanism and oxidation protection mechanism, and maintain the temperature after reaching the target temperature value; S2: The main spindle mechanism rotates at the preset spindle speed. The hot spinning three-wheel high-power spinning machine feeds synchronously in the horizontal and radial directions and presses the workpiece step by step. The pressure sensor collects the load force information of the radial cylinder in the hot spinning three-wheel high-power spinning machine in real time. The temperature sensor collects the actual temperature information of the workpiece surface in real time. The displacement sensor collects the radial displacement information of the radial cylinder piston rod in the hot spinning three-wheel high-power spinning machine in real time. S3: The PLC calculates the servo valve opening in real time based on the radial displacement information of the piston rod, and controls the servo valve to operate in real time according to the calculated servo valve opening. S4: The PLC calculates the heating compensation power in real time according to the formula (4) based on the actual temperature information of the workpiece surface, the load force information of the radial cylinder and the radial displacement information of the piston rod, and controls the heating mechanism to perform dynamic temperature compensation according to the heating compensation power. （4）； in: Indicates heating compensation power. Indicates the total heat loss coefficient. Indicates the diameter of the workpiece. This indicates the radial displacement of the piston rod of the radial hydraulic cylinder. Indicates the length of the workpiece. This indicates the actual surface temperature of the workpiece. Indicates ambient temperature. Indicates the coefficient of friction of the workpiece. Indicates the radial cylinder load force. Indicates the spindle speed; S5: The PLC calculates the required flow rate of inert gas for the oxidation protection mechanism in real time based on the radial cylinder load force information, and controls the output flow rate of inert gas for the oxidation protection mechanism according to the required flow rate. S6: After reaching the target spindle pressure, shut off the heating mechanism, maintain the inert gas supply to the oxidation protection mechanism, and when the temperature of the workpiece to be processed drops below 200℃, shut off the spindle mechanism and oxidation protection mechanism, loosen the spindle chuck and tailstock mechanism, and unload the workpiece.

2. The spinning control method for a magnesium alloy hot spinning three-wheel high-power spinning machine according to claim 1, characterized in that: The target temperature value in step S1 is between 300°C and 400°C.

3. The spinning control method for a magnesium alloy hot spinning three-wheel high-power spinning machine according to claim 1, characterized in that: The preset spindle speed in step S2 is between 50 r / min and 300 r / min.

4. The spinning control method of a magnesium alloy hot spinning three-wheel high-power spinning machine according to claim 1, characterized in that: The target spinning force mentioned in step S6 is between 5 kN and 250 kN.

5. The spinning control method for a magnesium alloy hot spinning three-wheel high-power spinning machine according to claim 1, characterized in that: The PLC calculates the radial oil supply flow rate of the radial cylinder based on the radial displacement information of the radial cylinder piston rod according to the oil supply flow rate model (1), and then calculates the servo valve opening degree according to the relationship between the radial oil supply flow rate and the servo valve flow rate (2) and the servo valve flow control model (3). The PLC controls the servo valve to operate according to the calculated servo valve opening degree. （1）； （2）； （3）； in: Indicates the radial oil supply flow rate of the hydraulic cylinder. This represents the effective area of ​​the radial cylinder piston. This indicates the radial displacement of the piston rod of the radial hydraulic cylinder. Indicates time, This represents the internal leakage coefficient of the radial hydraulic cylinder. Indicates load voltage drop. This represents the total volume of the two oil chambers in the radial hydraulic cylinder. This represents the equivalent bulk modulus of elasticity of the oil. Indicates the servo valve flow rate. Indicates the flow coefficient of the servo valve. Indicates the valve opening degree of the servo valve. This indicates the maximum effective throttling area of ​​the servo valve orifice. Indicates the density of hydraulic oil. This indicates the pressure difference between the inlet and outlet of the servo valve.

6. The spinning control method of a magnesium alloy hot spinning three-wheel high-power spinning machine according to claim 1, characterized in that: In step S5, the PLC calculates the required inert gas flow rate for the oxidation protection mechanism in real time based on the inert gas flow control model (5): （5）； in: This indicates the flow rate of inert gas required for the oxidation protection mechanism. This indicates the initial inert gas flow rate of the oxidation protection mechanism. This represents the thermal rotation constant of magnesium alloys. This indicates the radial cylinder load force.

7. A magnesium alloy hot spinning three-wheel high-power spinning machine system, used to execute the spinning control method of a magnesium alloy hot spinning three-wheel high-power spinning machine as described in any one of claims 1 to 6, characterized in that: The system includes a bed platform, a spindle mechanism, a tailstock mechanism, a three-wheeled hot-spinning high-power spinning machine, a heating mechanism, an oxidation protection mechanism, a PLC, a pressure sensor, a temperature sensor, and a displacement sensor. The spindle mechanism includes a spindle mounting bracket, a spindle, a spindle motor, and a spindle chuck. The spindle mounting bracket is fixedly mounted on the bed platform, and the spindle motor is fixedly mounted on the spindle mounting bracket to drive the spindle rotation. The spindle chuck is mounted at the end of the spindle. The tailstock mechanism is slidably mounted on the bed platform and driven by the tailstock motor to slide along the bed platform. The three-wheeled hot-spinning high-power spinning machine includes a spinning machine frame, a transmission unit, three slides, and three spinning wheels. The frame is slidably mounted on the bed platform and driven by the transmission unit to slide along the bed platform. The three rams are slidably mounted on the spinning machine frame. The three spinning wheels are fixedly mounted on the ends of the corresponding rams and are evenly distributed. The three spinning wheels are driven by a radial cylinder to move radially. The pressure sensor is mounted on the radial cylinder. The temperature sensor is mounted on the spinning machine frame. The displacement sensor is mounted between the rams and the spinning machine frame. The pressure sensor, temperature sensor, and displacement sensor are respectively connected to the PLC. The heating mechanism heats the surface of the workpiece. The oxidation protection mechanism blows inert gas into the surface of the workpiece for oxidation protection.

8. A magnesium alloy hot spinning three-wheel high-power spinning machine system according to claim 7, characterized in that: The oxidation protection mechanism includes an argon generator and multiple nozzles. The multiple nozzles are connected to the argon generator through argon pipelines. A flow regulating valve is installed on the argon pipelines. The heating mechanism includes an intermediate frequency furnace and a thermocouple. The intermediate frequency furnace and the thermocouple are connected through a thermal pipeline. The intermediate frequency furnace and the argon generator are both fixedly installed on a base. The base, the argon pipeline, and the thermal pipeline are all fixedly connected to the spinning machine frame.

9. A magnesium alloy hot spinning three-wheel high-power spinning machine system according to claim 7, characterized in that: The transmission unit includes a lead screw, a lead screw motor, and a nut sleeve fixedly mounted on the spinning machine frame. The lead screw is mounted on the bed platform and driven to rotate by the lead screw motor, and the nut sleeve is fitted onto the lead screw.

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