Method, device, electronic device and storage medium for tilting furnace operation control

Abstract

This application belongs to the technical field of additive manufacturing metal powder atomization equipment, and discloses a tilting operation control method, device, electronic device and storage medium. The method includes: S101, obtaining the structural parameters and flow data of the deflector nozzle in the tilting system, the inner diameter size of the tundish, and the melting chamber air pressure and atomization chamber air pressure; S102, determining the maximum liquid level of the alloy melt in the tundish according to the structural parameters, flow data, melting chamber air pressure and atomization chamber air pressure; S103, calculating the time interval of the tilting operation corresponding to the structural parameters, flow data and inner diameter size; S104, transferring the alloy melt in the melting induction furnace body to the tundish based on the time interval and the maximum liquid level. By controlling the tilting operation based on the calculated maximum liquid level of the alloy melt in the tundish and the time interval of the tilting operation, the working efficiency of the tilting operation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of additive manufacturing metal powder atomization equipment. Specifically, it relates to a method and device for controlling the tilting operation, an electronic device, and a storage medium. Background Art

[0002] Currently, the tilting operation during the powder atomization process needs to be completed manually. The operator has to keep an eye on the liquid level of the alloy melt in the tundish and judge based on experience when to replenish the tundish through the tilting operation.

[0003] The manual tilting operation has the following problems: First, it increases the number of operators specifically for the tilting operation, increasing labor costs. Second, when the tilting operation is completed manually, it is easy to have a situation where the melt flow parameters deviate or are inconvenient to adjust, reducing the atomization performance of the equipment. Third, when the atomization equipment changes the size of the tundish or the nozzle to adapt to the production of different alloys, the tilting operation experience of the operator needs to be accumulated through multiple atomization tests, which also reduces the equipment utilization rate. Finally, when the alloy melt flows out of the nozzle, the liquid level of the alloy melt in the tundish gradually decreases, resulting in a decrease in the hydraulic pressure of the alloy melt, and then a continuous decrease in the flow rate of the alloy melt at the nozzle outlet, which may cause the atomization process parameter of the alloy melt flow rate not to be in the optimal state, leading to waste of resources. The tilting operation based on the naked eye observation and experience of the tilting operator cannot effectively solve the above problems, especially when the tilting operator changes.

[0004] Therefore, in order to solve the technical problems of low atomization efficiency and low powder product quality caused by human factors in the existing tilting operation method, there is an urgent need for a method and device for controlling the tilting operation, an electronic device, and a storage medium. Summary of the Invention

[0005] The purpose of the present application is to provide a method and device for controlling the tilting operation, an electronic device, and a storage medium. By controlling the tilting operation based on the calculated maximum liquid level of the alloy melt in the tundish and the time interval of the tilting operation, it solves the problems of low atomization efficiency and low powder product quality caused by human factors in the existing tilting operation method, ensures that the alloy melt flow rate at the nozzle outlet is within the range required by the atomization process throughout the process, prevents the alloy melt flow rate from deviating from the optimal process range, and improves the working efficiency of the tilting operation.

[0006] In the first aspect, the present application provides a method for controlling the tilting operation, which is used to control the tilting operation, and includes the steps of:

[0007] S101, obtaining the structural parameters and flow data of the nozzle in the tilting system, the inner diameter size of the tundish, and the pressures in the melting chamber and the atomization chamber;

[0008] S102. Determine the maximum liquid level of the alloy melt in the tundish according to the structural parameters, the flow rate data, the pressure in the smelting chamber, and the pressure in the atomization chamber.

[0009] S103. Calculate the time interval of the tilting operation corresponding to the structural parameters, the flow rate data, and the inner diameter size.

[0010] S104. Transfer the alloy melt in the smelting induction furnace body to the tundish based on the time interval and the maximum liquid level.

[0011] The tilting operation control method provided by this application can be used to control the tilting operation. By controlling the tilting operation based on the calculated maximum liquid level of the alloy melt in the tundish and the time interval of the tilting operation, it solves the problems of low atomization efficiency and low quality of powder products caused by human factors in the existing tilting operation methods, ensures that the flow rate of the alloy melt at the outlet of the nozzle is within the range required by the atomization process throughout the process, prevents the flow rate of the alloy melt from deviating from the optimal process range, and improves the working efficiency of the tilting operation.

[0012] Optionally, the structural parameters include the length of the nozzle and the inner diameter at its outlet; the flow rate data includes the maximum and minimum flow rates of the melt flow at the outlet of the nozzle.

[0013] Optionally, step S102 includes:

[0014] Calculate the maximum liquid level of the alloy melt in the tundish according to the structural parameters, the flow rate data, the pressure in the smelting chamber, and the pressure in the atomization chamber, in combination with a preset calculation formula for the maximum liquid level of the melt.

[0015] The tilting operation control method provided by this application can be used to control the tilting operation. By calculating the maximum liquid level of the alloy melt in the tundish, it reduces the possibility of fluctuations in the maximum liquid level and improves the stability of the tilting operation.

[0016] Optionally, the preset calculation formula for the maximum liquid level of the melt is specifically:

[0017] ;

[0018] Where is the maximum liquid level of the alloy melt in the tundish, A is the area at the outlet of the nozzle, , d is the inner diameter at the outlet of the nozzle, g is the acceleration due to gravity, p t is the pressure in the smelting chamber, p a is the pressure in the atomization chamber, ρ is the density of the alloy melt, l p is the length of the nozzle, is the maximum flow rate of the melt at the outlet of the deflector nozzle.

[0019] Optionally, the calculation formula for the time interval of the tilting operation is specifically:

[0020] ;

[0021] Wherein, is the time interval, A is the area at the outlet of the deflector nozzle, , d is the inner diameter at the outlet of the deflector nozzle, g is the acceleration due to gravity, p t is the air pressure in the melting chamber, p a is the air pressure in the atomization chamber, ρ is the density of the alloy melt, l p is the length of the deflector nozzle, is the maximum liquid level of the alloy melt in the tundish, is the maximum flow rate of the melt at the outlet of the deflector nozzle, is the minimum flow rate of the melt at the outlet of the deflector nozzle, and D is the inner diameter size of the tundish.

[0022] Optionally, step S104 includes:

[0023] C1, tilting the melting induction furnace body to transfer the alloy melt into the tundish;

[0024] C2, when it is detected that the actual liquid level of the alloy melt in the tundish reaches the maximum liquid level, stop tilting the melting induction furnace body;

[0025] C3, after the time interval, return to execute step C1 until all the alloy melt in the melting induction furnace body is transferred into the tundish.

[0026] The tilting operation control method provided by the present application can be used to control the tilting operation. By using the maximum liquid level and the time interval, the tilting operation is controlled to ensure that the flow rate of the alloy melt at the outlet of the deflector nozzle is within the range required by the atomization process throughout the process, prevent the flow rate of the alloy melt from deviating from the optimal process range, and improve the working efficiency of the tilting operation.

[0027] Optionally, after step S104, the method further includes the step of:

[0028] D1, when the transfer of the alloy melt is completed, use an alarm signal to notify the staff of the completion of the tilting operation.

[0029] In a second aspect, the present application provides a tilting operation control device for controlling a tilting operation, including:

[0030] An acquisition module, configured to acquire the structural parameters and flow rate data of the deflector nozzle in the tilting furnace system, the inner diameter size of the tundish, and the pressures of the smelting chamber and the atomization chamber;

[0031] A determination module, configured to determine the maximum liquid level of the alloy melt in the tundish according to the structural parameters, the flow rate data, the pressure of the smelting chamber, and the pressure of the atomization chamber;

[0032] A calculation module, configured to calculate the time interval of the tilting furnace operation corresponding to the structural parameters, the flow rate data, and the inner diameter size;

[0033] A transfer module, configured to transfer the alloy melt in the smelting induction furnace body to the tundish based on the time interval and the maximum liquid level.

[0034] The tilting furnace operation control device controls the tilting furnace operation by calculating the maximum liquid level of the alloy melt in the tundish and the time interval of the tilting furnace operation, solves the problems of low atomization efficiency and low powder product quality caused by human factors in the existing tilting furnace operation method, ensures that the flow rate of the alloy melt at the outlet of the deflector nozzle is within the range required by the atomization process throughout the process, prevents the flow rate of the alloy melt from deviating from the optimal process range, and improves the working efficiency of the tilting furnace operation.

[0035] In a third aspect, the present application provides an electronic device, including a processor and a memory, the memory stores a computer program executable by the processor, and when the processor executes the computer program, it runs the steps in the tilting furnace operation control method as described above.

[0036] In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it runs the steps in the tilting furnace operation control method as described above.

[0037] Beneficial effects:

[0038] The tilting furnace operation control method, device, electronic device, and storage medium provided by the present application control the tilting furnace operation by calculating the maximum liquid level of the alloy melt in the tundish and the time interval of the tilting furnace operation, solve the problems of low atomization efficiency and low powder product quality caused by human factors in the existing tilting furnace operation method, ensure that the flow rate of the alloy melt at the outlet of the deflector nozzle is within the range required by the atomization process throughout the process, prevent the flow rate of the alloy melt from deviating from the optimal process range, and improve the working efficiency of the tilting furnace operation. Description of the drawings

[0039] Figure 1 It is a flowchart of the tilting furnace operation control method provided by an embodiment of the present application.

[0040] Figure 2Schematic diagram of the tilting operation control device provided by the embodiment of the present application.

[0041] Figure 3 Schematic diagram of the electronic device provided by the embodiment of the present application.

[0042] Figure 4 Schematic diagram of the relationship between the melt flow rate at the outlet of the deflector nozzle and the atomization time.

[0043] Figure 5 Schematic diagram of a tilting operation control system.

[0044] Label description: 1. Acquisition module; 2. Determination module; 3. Calculation module; 4. Transfer module; 301. Processor; 302. Memory; 303. Communication bus; 11. Melting chamber of the atomization device; 12. Melting induction furnace body; 13. Tundish; 14. Deflector nozzle; 15. Atomization chamber; 16. Sensor; 17. Driving mechanism; 18. Tilting mechanism; 19. Computer; 20. Control mechanism. Specific implementation manners

[0045] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0046] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used for differential description and cannot be understood as indicating or implying relative importance.

[0047] Please refer to Figure 1 , Figure 1 which is a tilting operation control method in some embodiments of the present application for controlling the tilting operation, including:

[0048] Step S101, acquiring the structural parameters and flow data of the deflector nozzle in the tilting system, the inner diameter size of the tundish, and the air pressure in the melting chamber and the air pressure in the atomization chamber;

[0049] Step S102: Determine the maximum liquid level of the alloy melt in the tundish based on the structural parameters, flow data, pressure in the melting chamber, and pressure in the atomization chamber.

[0050] Step S103: Calculate the time interval for the tilting operation corresponding to the structural parameters, flow data, and inner diameter size.

[0051] Step S104: Transfer the alloy melt in the melting induction furnace body to the tundish based on the time interval and the maximum liquid level.

[0052] This tilting operation control method controls the tilting operation by based on the calculated maximum liquid level of the alloy melt in the tundish and the time interval of the tilting operation, solves the problems of low atomization efficiency and low quality of powder products caused by human factors in the existing tilting operation methods, ensures that the flow rate of the alloy melt at the outlet of the nozzle is within the range required by the atomization process throughout the process, prevents the flow rate of the alloy melt from deviating from the optimal process range, and improves the working efficiency of the tilting operation.

[0053] Specifically, in step S101, obtain the structural parameters and flow data of the nozzle in the tilting system, the inner diameter size of the tundish, as well as the pressure in the melting chamber and the pressure in the atomization chamber. The structural parameters of the nozzle include the length of the nozzle and the inner diameter at its outlet. The flow data at the outlet of the nozzle includes the maximum flow rate and the minimum flow rate of the melt flow at the outlet of the nozzle. The maximum flow rate and the minimum flow rate are set according to the requirements of the atomization process, and the maximum flow rate and the minimum flow rate are used to ensure that the flow rate of the alloy melt is within the optimal process range.

[0054] Specifically, in step S102, based on the structural parameters, flow data, pressure in the melting chamber, and pressure in the atomization chamber, and in combination with a preset calculation formula for the maximum liquid level of the melt, calculate the maximum liquid level of the alloy melt in the tundish.

[0055] In step S102, the preset calculation formula for the maximum liquid level of the melt is specifically:

[0056] ;

[0057] Where is the maximum liquid level of the alloy melt in the tundish, A is the area at the outlet of the nozzle, , d is the inner diameter at the outlet of the nozzle, g is the acceleration due to gravity, p t is the pressure in the melting chamber, p a is the pressure in the atomization chamber, ρ is the density of the alloy melt, l p is the length of the nozzle, is the maximum flow rate of the melt flow at the outlet of the nozzle.

[0058] Specifically, in step S103, the time interval of the tilting operation is calculated based on the structural parameters, flow data, and inner diameter size.

[0059] The specific calculation formula for the time interval of the tilting operation is as follows:

[0060] ;

[0061] Wherein, is the time interval, A is the area at the outlet of the tundish nozzle, , d is the inner diameter at the outlet of the tundish nozzle, g is the acceleration due to gravity, p t is the pressure in the melting chamber, p a is the pressure in the atomization chamber, ρ is the density of the alloy melt, l p is the length of the tundish nozzle, is the maximum value of the liquid level of the alloy melt in the tundish, is the maximum value of the flow rate of the melt at the outlet of the tundish nozzle, is the minimum value of the flow rate of the melt at the outlet of the tundish nozzle, D is the inner diameter size of the tundish.

[0062] According to the variation relationship of the tundish liquid level and the melt flow rate at the outlet of the tundish nozzle with time, the time interval of the tilting operation, as well as the maximum and minimum values of the liquid level of the alloy melt in the tundish, are determined. The specific calculation process is as follows:

[0063] Record the tilting completion time as T s = 0 s, and at this time, the liquid level of the alloy melt in the tundish is h h . At any moment t (0 ≤ t ≤ T e ) within the time interval T e between two adjacent tilting operations, the liquid level of the alloy melt in the tundish is h, and the melt flow rate and the flow velocity at the outlet of the tundish nozzle are q (m³ / s) and v (m / s), respectively.

[0064] The following relationship exists between the flow rate q and the flow velocity v:

[0065] ;

[0066] Wherein, α is the effective flow coefficient at the outlet of the tundish nozzle, with a value of 1, which can be modified according to actual needs, but is not limited thereto. A is the area at the outlet of the tundish nozzle, which is , d is the inner diameter at the outlet of the tundish nozzle, q is the melt flow rate at the outlet of the tundish nozzle, and v is the melt flow velocity at the outlet of the tundish nozzle.

[0067] Establish the Bernoulli equation from the liquid surface of the alloy melt in the tundish to the cross-section at the outlet of the tundish nozzle. The Bernoulli equation is specifically:

[0068] ;

[0069] Among them, p t is the air pressure in the melting chamber; p a is the air pressure at the outlet of the flow guide nozzle, generally taking the air pressure in the atomization chamber; ρ is the density of the alloy melt; g is the acceleration due to gravity; v t is the descending speed of the alloy melt level in the tundish; l p is the length of the flow guide nozzle.

[0070] From the Bernoulli equation, we get

[0071] ;

[0072] According to the mass conservation relationship, the flow rate of the alloy melt disappearing in the tundish per unit time is equal to the flow rate of the alloy melt flowing out from the outlet of the flow guide nozzle, that is

[0073] ;

[0074] Among them, A t is the horizontal cross-sectional area of the tundish, , D is the inner diameter size of the tundish.

[0075] So we get:

[0076] ;

[0077] Generally, the inner diameter size D of the tundish is about 100 - 150 mm, and the inner diameter d at the outlet of the flow guide nozzle is about 1.5 - 4 mm. Therefore The value is usually less than 0.0016. That is <0.0016v, which can be ignored compared with v.

[0078] Simplify the Bernoulli equation from the above formula to obtain the simplified Bernoulli equation:

[0079] ;

[0080] From the moment T s = 0 s to the moment t, the reduction in the melt flow rate Q h caused by the liquid level in the tundish dropping from h t by Δh to h is equal to the amount of melt flowing out from the flow guide nozzle, so we have

[0081] ;

[0082] Among them, Q t is the reduction in the melt flow rate in the tundish, and Δh is the drop in the liquid level in the tundish.

[0083] From the above formula, we can get:

[0084] ;

[0085] At time t, the liquid level h in the tundish is:

[0086] ;

[0087] Substitute the above formula into the simplified Bernoulli equation and perform differential solution with respect to time t, and the relationship between the melt flow velocity v at the nozzle outlet and time can be obtained as follows:

[0088] ;

[0089] Under the stable atomization process, the pressure in the melting chamber and the pressure in the atomization chamber are basically maintained stable during the whole atomization process, so:

[0090] ;

[0091] Then the relationship between the melt flow velocity v at the nozzle outlet and time can be simplified to:

[0092] ;

[0093] That is, the relationship between the melt flow rate q at the nozzle outlet and time is:

[0094] ;

[0095] Combined with the atomization process parameters, the allowable flow rate range (q min ≤q≤q max ) of the melt flow rate q at the nozzle outlet can be used to determine the time interval T e between two atomization furnace tilting operations by using the above formula, and thus the furnace tilting frequency can be determined.

[0096] Since the inner diameter of the tundish is generally about 100 - 150 mm and the inner diameter of the nozzle outlet is about 1.5 - 4 mm. Therefore the value is usually less than 0.0003, so the relationship between the melt flow rate q at the nozzle outlet and time can be simplified to:

[0097] ;

[0098] The atomization process requires that the melt flow rate q at the nozzle outlet is between q min and q max .

[0099] As can be seen from the above formula, when t = 0s, the melt flow rate q at the outlet of the flow guide nozzle is the largest at this time. When the melt flow rate q at the outlet of the flow guide nozzle is the largest, the tundish liquid level is at the maximum value, that is, when the tilting operation is just completed, the maximum value of the melt flow rate q at the outlet of the flow guide nozzle is:

[0100] ;

[0101] As the time t increases, the melt flow rate at the outlet of the flow guide nozzle gradually decreases. When q decreases to q min it takes a time interval T e , and at this time the liquid level in the tundish is at the lowest value h l . At the same time, a tilting operation needs to be performed at this time. Using the simplified relationship between the melt flow rate q at the outlet of the flow guide nozzle and time change, the time interval T e can be determined. The calculation formula for the time interval T e is:

[0102] ;

[0103] When t = T e , a tilting operation needs to be performed again. At this time, the melt flow rate q at the outlet of the flow guide nozzle is the smallest, and the liquid level in the tundish drops to h l , and its value is:

[0104] ;

[0105] From the calculation formula and the calculation formula, the maximum height (maximum liquid level) h h and the minimum height (minimum liquid level) h l of the tundish liquid level can be obtained respectively as:

[0106] ;

[0107] .

[0108] Every time the time interval T e elapses, a tilting operation is completed, so that the flow rate at the outlet of the flow guide nozzle is restored to q max , as shown in Figure 4 . Figure 4 is a schematic diagram of the relationship between the melt flow rate at the outlet of the flow guide nozzle and the atomization time. Among them, T is the atomization time.

[0109] Specifically, in step S104, based on the time interval and the maximum liquid level, transferring the alloy melt in the melting induction furnace body to the tundish includes:

[0110] C1, tilting the melting induction furnace body to transfer the alloy melt into the tundish;

[0111] C2. When it is detected that the actual liquid level of the alloy melt in the tundish reaches the maximum liquid level, stop tilting the melting induction furnace body.

[0112] C3. After a time interval, return to execute step C1 until all the alloy melt in the melting induction furnace body is transferred to the tundish.

[0113] In step S104, at the start of the tilting operation, the liquid level in the tundish is at the minimum liquid level. By tilting the melting induction furnace body, the alloy melt can be transferred into the tundish. Detect the highest liquid level (maximum liquid level) of the tundish to check whether the liquid level in the tundish reaches the highest liquid level. If the liquid level in the tundish does not reach the highest liquid level, the tilting operation continues. If the liquid level in the tundish reaches the highest liquid level, stop tilting the melting induction furnace body to complete one tilting operation. After a time interval T e continue the tilting operation to perform the next tilting operation, tilt the melting induction furnace body and detect whether the alloy melt in the tundish reaches the highest liquid level until all the alloy melt in the melting induction furnace body is transferred to the tundish.

[0114] For example, as Figure 5 shown, Figure 5 is a schematic diagram of a tilting operation control system. This system is used to control the tilting operation. The system includes an atomization equipment melting chamber 11 and its affiliated mechanisms, which at least include a melting induction furnace body 12, a tundish 13, a nozzle 14, an atomization chamber 15, a sensor 16, a driving mechanism 17, and a tilting mechanism 18. The system also includes a computer 19 and a control mechanism 20. Among them, the nozzle 14 is installed below the tundish 13, and the outlet of the nozzle 14 extends into the atomization chamber 15. The sensor 16 can be, but is not limited to, a liquid level sensor, a thermocouple for temperature measurement, or a pressure sensor, etc. (The advantage of using a thermocouple for temperature measurement as the sensor 16 is that it can directly detect the temperature of the alloy melt, and then remind the staff whether to increase the power or reduce the heat preservation induction power of the tundish 13. The thermocouple is convenient to arrange, does not need to be arranged along the central axis of the tundish, and does not need to transform the structure of the melting chamber, which can facilitate the automatic control transformation of the tilting operation for the existing atomization equipment, and the thermocouple is inexpensive).

[0115] Before the atomization preparation work stage, the staff first determine the atomization process parameters according to the type of alloy to be atomized and the requirements of the powder particle size distribution, set the maximum flow rate q max and the minimum flow rate q min of the alloy melt at the outlet of the nozzle 14, determine the length l p of the nozzle and the inner diameter d at its outlet, and set the inner diameter size D of the tundish. The computer 19 automatically gives the maximum liquid level h h and the minimum liquid level h of the tundish according to the control program.l and the tilting operation time interval T e The staff places the sensor 16 at the maximum liquid level h in the tundish h It is necessary to ensure that the detection head of the sensor 16 is immersed in the alloy melt when the tilting operation is completed.

[0116] After atomization starts, the computer 19 issues a tilting work command to the control mechanism 20. The control mechanism 20 controls the drive mechanism 17 to push the tilting mechanism 18 to rotate the melting induction furnace body 12. The alloy melt in the melting induction furnace body 12 flows into the tundish 13 under the action of gravity. When the liquid level in the tundish reaches the maximum liquid level h h the sensor 16 detects the liquid level signal, and the control mechanism 20 immediately stops the tilting work and waits for T e After a period of time, the control mechanism 20 issues a tilting work command and repeats the tilting work until the tilting operation is completed.

[0117] Specifically, based on the time interval and the maximum liquid level, after transferring the alloy melt in the melting induction furnace body to the tundish, the method further includes the steps of:

[0118] D1. When the transfer of the alloy melt is completed, use an alarm signal to notify the staff of the completion of the tilting operation.

[0119] When the transfer of the alloy melt is completed, use an alarm signal to notify the staff of the completion of the tilting operation, that is, when the tilting operation is completed, notify the staff that the tilting operation has been completed by sending an alarm signal.

[0120] As can be seen from the above, in this tilting operation control method, through the steps: S101, obtaining the structural parameters and flow data of the diversion nozzle in the tilting system, the inner diameter size of the tundish, and the melting chamber air pressure and atomization chamber air pressure; S102, determining the maximum liquid level of the alloy melt in the tundish according to the structural parameters, flow data, melting chamber air pressure and atomization chamber air pressure; S103, calculating the time interval of the tilting operation corresponding to the structural parameters, flow data and inner diameter size; S104, based on the time interval and the maximum liquid level, transferring the alloy melt in the melting induction furnace body to the tundish; thus, by controlling the tilting operation based on the calculated maximum liquid level of the alloy melt in the tundish and the time interval of the tilting operation, the problems of low atomization efficiency and low powder product quality caused by human factors in the existing tilting operation method are solved, ensuring that the alloy melt flow rate at the outlet of the diversion nozzle is within the range required by the atomization process throughout the process, preventing the alloy melt flow rate from deviating from the optimal process range, and improving the working efficiency of the tilting operation.

[0121] Reference Figure 2 This application provides a tilting operation control device for controlling the tilting operation, including:

[0122] An acquisition module 1, configured to acquire the structural parameters and flow data of the nozzle in the tilting furnace system, the inner diameter size of the tundish, and the melting chamber air pressure and the atomizing chamber air pressure;

[0123] A determination module 2, configured to determine the maximum liquid level of the alloy melt in the tundish according to the structural parameters, flow data, melting chamber air pressure, and atomizing chamber air pressure;

[0124] A calculation module 3, configured to calculate the time interval of the tilting furnace operation corresponding to the structural parameters, flow data, and inner diameter size;

[0125] A transfer module 4, configured to transfer the alloy melt in the melting induction furnace body to the tundish based on the time interval and the maximum liquid level.

[0126] The tilting furnace operation control device controls the tilting furnace operation by based on the calculated maximum liquid level of the alloy melt in the tundish and the time interval of the tilting furnace operation, solves the problems of low atomization efficiency and low quality of powder products caused by human factors in the existing tilting furnace operation method, ensures that the alloy melt flow rate at the nozzle outlet is within the range required by the atomization process throughout the process, prevents the alloy melt flow rate from deviating from the optimal process range, and improves the working efficiency of the tilting furnace operation.

[0127] Specifically, when the acquisition module 1 is executed, it acquires the structural parameters and flow data of the nozzle in the tilting furnace system, the inner diameter size of the tundish, and the melting chamber air pressure and the atomizing chamber air pressure. The structural parameters of the nozzle include the length of the nozzle and the inner diameter at its outlet. The flow data at the nozzle outlet includes the maximum flow rate and the minimum flow rate of the melt flow rate at the nozzle outlet. The maximum flow rate and the minimum flow rate are set according to the atomization process requirements, and are used to ensure that the alloy melt flow rate is within the optimal process range.

[0128] Specifically, when the determination module 2 is executed, it calculates the maximum liquid level of the alloy melt in the tundish according to the structural parameters, flow data, melting chamber air pressure, and atomizing chamber air pressure, in combination with a preset calculation formula for the maximum liquid level of the melt.

[0129] When the determination module 2 is executed, the preset calculation formula for the maximum liquid level of the melt is specifically:

[0130] ;

[0131] Wherein, is the maximum liquid level of the alloy melt in the tundish, A is the area at the nozzle outlet, , d is the inner diameter at the nozzle outlet, g is the acceleration due to gravity, p t is the melting chamber air pressure, p a is the atomizing chamber air pressure, ρ is the density of the alloy melt, lp is the length of the flow guide nozzle, is the maximum value of the melt flow rate at the outlet of the flow guide nozzle.

[0132] Specifically, when the calculation module 3 is executed, the corresponding time interval of the tilting operation is calculated from the structural parameters, flow data, and inner diameter size.

[0133] The specific calculation formula for the time interval of the tilting operation is:

[0134] ;

[0135] where, is the time interval, A is the area at the outlet of the flow guide nozzle, , d is the inner diameter at the outlet of the flow guide nozzle, g is the acceleration due to gravity, p t is the air pressure in the melting chamber, p a is the air pressure in the atomization chamber, ρ is the density of the alloy melt, l p is the length of the flow guide nozzle, is the maximum value of the liquid level of the alloy melt in the tundish, is the maximum value of the melt flow rate at the outlet of the flow guide nozzle, is the minimum value of the melt flow rate at the outlet of the flow guide nozzle, D is the inner diameter size of the tundish.

[0136] According to the variation relationship of the tundish liquid level and the melt flow rate at the outlet of the flow guide nozzle with time, the time interval of the tilting operation, as well as the maximum and minimum values of the liquid level of the alloy melt in the tundish, are determined. The specific calculation process is as follows:

[0137] Record the tilting completion time as T s = 0 s, at this time the liquid level of the alloy melt in the tundish is h h . At any moment t (0 ≤ t ≤ T e ) within the time interval T e between two adjacent tilting operations, the liquid level of the alloy melt in the tundish is h, and the melt flow rate and the flow velocity at the outlet of the flow guide nozzle are q (m³ / s) and v (m / s), respectively.

[0138] The following relationship exists between the flow rate q and the flow velocity v:

[0139] ;

[0140] where, α is the effective flow coefficient at the outlet of the flow guide nozzle, with a value of 1, which can be modified according to actual needs, but is not limited to this. A is the area at the outlet of the flow guide nozzle, which is , d is the inner diameter at the outlet of the flow guide nozzle, q is the melt flow rate at the outlet of the flow guide nozzle, and v is the melt flow velocity at the outlet of the flow guide nozzle.

[0141] Establish the Bernoulli equation from the liquid level of the alloy melt in the tundish to the cross-section at the outlet of the tundish nozzle. The specific Bernoulli equation is as follows:

[0142] ;

[0143] Among them, p t is the air pressure in the melting chamber; p a is the air pressure at the outlet of the tundish nozzle, generally taking the air pressure in the atomization chamber; ρ is the density of the alloy melt; g is the acceleration due to gravity; v t is the descending speed of the liquid level of the alloy melt in the tundish; l p is the length of the tundish nozzle.

[0144] From the Bernoulli equation, we get

[0145] ;

[0146] According to the mass conservation relationship, the flow rate of the alloy melt disappearing in the tundish per unit time is equal to the flow rate of the alloy melt flowing out from the outlet of the tundish nozzle, that is

[0147] ;

[0148] Among them, A t is the horizontal cross-sectional area of the tundish, , D is the inner diameter size of the tundish.

[0149] So we get:

[0150] ;

[0151] Generally, the inner diameter size D of the tundish is about 100 - 150 mm, and the inner diameter d at the outlet of the tundish nozzle is about 1.5 - 4 mm. Therefore The value is usually less than 0.0016. That is <0.0016v, which can be ignored compared with v.

[0152] Simplify the Bernoulli equation from the above formula to obtain the simplified Bernoulli equation:

[0153] ;

[0154] From the moment T s = 0 s to the moment t, the reduction in the melt flow rate Q h caused by the liquid level in the tundish dropping by Δh from h t to h is equal to the amount of melt flowing out from the tundish nozzle, and we have

[0155] ;

[0156] Among them, Q tis the reduction in the melt flow rate in the tundish, and Δh is the decrease in the tundish liquid level.

[0157] From the above equation, we can obtain:

[0158] ;

[0159] At time t, the tundish liquid level h is:

[0160] ;

[0161] Substitute the above equation into the simplified Bernoulli equation and perform differential solution with respect to time t, and the relationship between the melt diversion velocity v at the nozzle outlet and time can be obtained as follows:

[0162] ;

[0163] Under stable atomization process conditions, the pressure in the melting chamber and the pressure in the atomization chamber are basically maintained stable throughout the atomization process, so we get: ;

[0164] Then the relationship between the melt diversion velocity v at the nozzle outlet and time can be simplified to:

[0165] ;

[0166] That is, the relationship between the melt flow rate q at the nozzle outlet and time is:

[0167] ;

[0168] Combining the atomization process parameters with the allowable flow rate range (q min ≤ q ≤ q max ) of the melt flow rate q at the nozzle outlet, the time interval T e between two atomization and tilting operations can be determined using the above formula, and thus the tilting frequency can be determined.

[0169] Since the inner diameter of the tundish is generally about 100 - 150 mm and the inner diameter of the nozzle outlet is about 1.5 - 4 mm. Therefore the value is usually less than 0.0003, so the relationship between the melt flow rate q at the nozzle outlet and time can be simplified to:

[0170] ;

[0171] The atomization process requires that the melt flow rate q at the nozzle outlet be between q min and q max .

[0172] As can be seen from the above formula, when t = 0s, the melt flow rate q at the outlet of the flow guide nozzle is the largest at this time. When the melt flow rate q at the outlet of the flow guide nozzle is the largest, the tundish liquid level is at the maximum value, that is, just after the tilting operation is completed. The maximum value of the melt flow rate q at the outlet of the flow guide nozzle is:

[0173] ;

[0174] As the time t increases, the melt flow rate at the outlet of the flow guide nozzle gradually decreases. When q decreases to q min it takes a time interval T e , and at this time the liquid level in the tundish is at the lowest value h l . At the same time, a tilting operation needs to be performed at this time. Using the simplified relationship between the melt flow rate q at the outlet of the flow guide nozzle and time, the time interval T e can be determined. The calculation formula for the time interval T e is:

[0175] ;

[0176] When t = T e , a tilting operation needs to be performed again. At this time, the melt flow rate q at the outlet of the flow guide nozzle is the smallest, and the liquid level in the tundish drops to h l , and its value is:

[0177] ;

[0178] From the calculation formula and the calculation formula, the maximum height (maximum liquid level) h h and the minimum height (minimum liquid level) h l of the tundish liquid level can be obtained respectively as:

[0179] ;

[0180] .

[0181] Every time the time interval T e passes, a tilting operation is completed, so that the flow rate at the outlet of the flow guide nozzle is restored to q max , as shown in Figure 4 . Figure 4 is a schematic diagram of the relationship between the melt flow rate at the outlet of the flow guide nozzle and the atomization time. Among them, T is the atomization time.

[0182] Specifically, when the transfer module 4 transfers the alloy melt in the smelting induction furnace body to the tundish based on the time interval and the maximum liquid level, it performs:

[0183] C1, tilt the smelting induction furnace body to transfer the alloy melt to the tundish;

[0184] C2. When it is detected that the actual liquid level of the alloy melt in the tundish reaches the maximum liquid level, stop tilting the melting induction furnace body.

[0185] C3. After a time interval, return to execute step C1 until all the alloy melt in the melting induction furnace body is transferred into the tundish.

[0186] When the transfer module 4 is executing, at the start of the tilting operation, the liquid level in the tundish is at the minimum liquid level. The alloy melt can be transferred into the tundish by tilting the melting induction furnace body. Detect the highest liquid level (maximum liquid level) of the tundish to check whether the liquid level in the tundish reaches the highest liquid level. If the liquid level in the tundish does not reach the highest liquid level, the tilting operation continues. If the liquid level in the tundish reaches the highest liquid level, stop tilting the melting induction furnace body to complete one tilting operation. After a time interval T e continue the tilting operation to perform the next tilting operation, tilt the melting induction furnace body and detect whether the alloy melt in the tundish reaches the highest liquid level until all the alloy melt in the melting induction furnace body is transferred into the tundish.

[0187] For example, as Figure 5 shown, Figure 5 is a schematic diagram of a tilting operation control system. This system is used to control the tilting operation. The system includes an atomization equipment melting chamber 11 and its affiliated mechanisms, which at least include a melting induction furnace body 12, a tundish 13, a nozzle 14, an atomization chamber 15, a sensor 16, a driving mechanism 17, and a tilting mechanism 18. The system also includes a computer 19 and a control mechanism 20. Among them, the nozzle 14 is installed below the tundish 13, and the outlet of the nozzle 14 extends into the atomization chamber 15. The sensor 16 can be but is not limited to a liquid level sensor, a thermocouple for temperature measurement, or a pressure sensor, etc. (The advantage of using a thermocouple for temperature measurement as the sensor 16 is that it can directly detect the temperature of the alloy melt, and then remind the staff whether to increase the power or reduce the power of the heat preservation induction power supply of the tundish 13. The thermocouple for temperature measurement is convenient to arrange. It does not need to be arranged along the central axis of the tundish, nor does it need to transform the structure of the melting chamber. It can facilitate the automation control transformation of the existing atomization equipment for tilting operation, and the thermocouple for temperature measurement is cheap).

[0188] Before the atomization preparation work stage, the staff first determine the atomization process parameters according to the type of alloy to be atomized and the requirements of the powder particle size distribution, set the maximum flow rate q max and the minimum flow rate q min of the alloy melt at the outlet of the nozzle 14, determine the length l p of the nozzle and its inner diameter d at the outlet, and set the inner diameter size D of the tundish. The computer 19 automatically gives the maximum liquid level h h and the minimum liquid level h of the tundish according to the control program.l , and the tilting operation time interval T e . The staff places the sensor 16 at the maximum liquid level h in the tundish h . It is necessary to ensure that the detection head of the sensor 16 is immersed in the alloy melt when the tilting operation is completed

[0189] After atomization starts, the computer 19 issues a tilting work command to the control mechanism 20. The control mechanism 20 controls the drive mechanism 17 to push the tilting mechanism 18 to rotate the melting induction furnace body 12. The alloy melt in the melting induction furnace body 12 flows into the tundish 13 under the action of gravity. When the liquid level in the tundish reaches the maximum liquid level h h , the sensor 16 detects the liquid level signal, and the control mechanism 20 immediately stops the tilting work and waits for T e After a period of time, the control mechanism 20 issues a tilting work command and repeats the tilting work until the tilting operation is completed

[0190] Specifically, the device further includes:

[0191] A notification module, which is used to notify the staff of the completion of the tilting operation by using an alarm signal when the transfer of the alloy melt is completed

[0192] When the transfer of the alloy melt is completed, the staff is notified of the completion of the tilting operation by using an alarm signal, that is, after the tilting operation is completed, the staff is notified of the completion of the tilting operation by sending an alarm signal

[0193] As can be seen from the above, the tilting operation control device obtains the structural parameters and flow data of the nozzle in the tilting system, the inner diameter of the tundish, and the air pressure in the melting chamber and the atomization chamber. Based on the structural parameters, flow data, melting chamber air pressure, and atomization chamber air pressure, it determines the maximum liquid level of the alloy melt in the tundish, calculates the time interval of the tilting operation corresponding to the structural parameters, flow data, and inner diameter size, and based on the time interval and the maximum liquid level, transfers the alloy melt in the melting induction furnace body to the tundish; thus, by controlling the tilting operation based on the calculated maximum liquid level of the alloy melt in the tundish and the time interval of the tilting operation, it solves the problems of low atomization efficiency and low powder product quality caused by human factors in the existing tilting operation method, ensures that the alloy melt flow rate at the nozzle outlet is within the range required by the atomization process throughout the process, prevents the alloy melt flow rate from deviating from the optimal process range, and improves the working efficiency of the tilting operation

[0194] Please refer to Figure 3 , Figure 3A structural schematic diagram of an electronic device provided by an embodiment of the present application. The present application provides an electronic device, including: a processor 301 and a memory 302. The processor 301 and the memory 302 are interconnected and communicate with each other through a communication bus 303 and / or other forms of connection mechanisms (not marked). The memory 302 stores a computer program executable by the processor 301. When the electronic device runs, the processor 301 executes the computer program to execute the tilting operation control method in any optional implementation manner of the above embodiment to achieve the following functions: S101, obtaining the structural parameters and flow data of the deflector nozzle in the tilting system, the inner diameter size of the tundish, and the melting chamber air pressure and atomizing chamber air pressure; S102, determining the maximum liquid level value of the alloy melt in the tundish according to the structural parameters, flow data, melting chamber air pressure and atomizing chamber air pressure; S103, calculating the time interval of the tilting operation corresponding to the structural parameters, flow data and inner diameter size; S104, based on the time interval and the maximum liquid level value, transferring the alloy melt in the melting induction furnace body to the tundish.

[0195] An embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it executes the tilting operation control method in any optional implementation manner of the above embodiment to achieve the following functions: S101, obtaining the structural parameters and flow data of the deflector nozzle in the tilting system, the inner diameter size of the tundish, and the melting chamber air pressure and atomizing chamber air pressure; S102, determining the maximum liquid level value of the alloy melt in the tundish according to the structural parameters, flow data, melting chamber air pressure and atomizing chamber air pressure; S103, calculating the time interval of the tilting operation corresponding to the structural parameters, flow data and inner diameter size; S104, based on the time interval and the maximum liquid level value, transferring the alloy melt in the melting induction furnace body to the tundish. Wherein, the storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, abbreviated as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, abbreviated as EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, abbreviated as EPROM), programmable read-only memory (Programmable Red-Only Memory, abbreviated as PROM), read-only memory (Read-Only Memory, abbreviated as ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0196] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling, direct coupling, or communication connection between each other can be through some communication interfaces. The indirect coupling or communication connection of the devices or units can be in an electrical, mechanical, or other form.

[0197] In addition, the units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units. They can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0198] Furthermore, in each embodiment of the present application, the various functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0199] In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0200] The above description is only for the embodiments of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for controlling the tilting operation, which is used to control the tilting operation, characterized in that, Including the steps: S101, obtaining the structural parameters and flow data of the deflector nozzle in the tilting furnace system, the inner diameter size of the tundish, and the melting chamber pressure and atomizing chamber pressure; S102, determining the maximum liquid level of the alloy melt in the tundish according to the structural parameters, the flow data, the melting chamber pressure, and the atomizing chamber pressure; S103, calculating the time interval of the tilting furnace operation corresponding to the structural parameters, the flow data, and the inner diameter size; S104, transferring the alloy melt in the melting induction furnace body to the tundish based on the time interval and the maximum liquid level; Step S102 includes: Calculating the maximum liquid level of the alloy melt in the tundish according to the structural parameters, the flow data, the melting chamber pressure, and the atomizing chamber pressure, in combination with a preset calculation formula for the maximum melt liquid level; The specific preset calculation formula for the maximum melt liquid level is: ； Among them, is the maximum liquid level of the alloy melt in the tundish, A is the area at the outlet of the flow guide nozzle, , d is the inner diameter at the outlet of the flow guide nozzle, g is the acceleration due to gravity, p t is the air pressure in the smelting chamber, p a is the air pressure in the atomization chamber, ρ is the density of the alloy melt, l p is the length of the flow guide nozzle, is the maximum flow rate of the melt flow at the outlet of the flow guide nozzle; The specific calculation formula for the time interval of the tilting furnace operation is: ； Among them, is the time interval, A is the area at the outlet of the flow guide nozzle, , d is the inner diameter at the outlet of the flow guide nozzle, g is the acceleration due to gravity, p t is the air pressure in the melting chamber, p a is the air pressure in the atomization chamber, ρ is the density of the alloy melt, l p is the length of the flow guide nozzle, is the maximum value of the liquid level of the alloy melt in the tundish, is the maximum value of the flow rate of the melt at the outlet of the flow guide nozzle, is the minimum value of the flow rate of the melt at the outlet of the flow guide nozzle, D is the inner diameter size of the tundish.

2. The method for controlling the tilting operation according to claim 1, wherein, The structural parameters include the length of the deflector nozzle and the inner diameter at its outlet; the flow data includes the maximum flow rate and the minimum flow rate of the melt flow at the outlet of the deflector nozzle.

3. The tilting operation control method according to claim 1, characterized in that Step S104 includes: C1, tilting the melting induction furnace body to transfer the alloy melt to the tundish; C2, stopping tilting the melting induction furnace body when it is detected that the actual alloy melt liquid level in the tundish reaches the maximum liquid level; C3, after the time interval, returning to execute step C1 until all the alloy melt in the melting induction furnace body is transferred to the tundish.

4. The tilting operation control method according to claim 1, characterized in that, After step S104, it further includes the step: D1, when the transfer of the alloy melt is completed, using an alarm signal to notify the staff of the completion message of the tilting furnace operation.

5. A tilting operation control device for controlling tilting operations, characterized in that, Including: An acquisition module for acquiring the structural parameters and flow data of the deflector nozzle in the tilting furnace system, the inner diameter size of the tundish, and the melting chamber pressure and atomizing chamber pressure; A determination module for determining the maximum liquid level of the alloy melt in the tundish according to the structural parameters, the flow data, the melting chamber pressure, and the atomizing chamber pressure; A calculation module for calculating the time interval of the tilting furnace operation corresponding to the structural parameters, the flow data, and the inner diameter size; A transfer module for transferring the alloy melt in the melting induction furnace body to the tundish based on the time interval and the maximum liquid level; The determination module for determining the maximum liquid level of the alloy melt in the tundish according to the structural parameters, the flow data, the melting chamber pressure, and the atomizing chamber pressure includes: Calculating the maximum liquid level of the alloy melt in the tundish according to the structural parameters, the flow data, the melting chamber pressure, and the atomizing chamber pressure, in combination with a preset calculation formula for the maximum melt liquid level; The specific preset calculation formula for the maximum melt liquid level is: ； Among them, is the maximum liquid level of the alloy melt in the tundish, A is the area at the outlet of the flow guide nozzle, , d is the inner diameter at the outlet of the flow guide nozzle, g is the acceleration due to gravity, p t is the air pressure in the melting chamber, p a is the air pressure in the atomization chamber, ρ is the density of the alloy melt, l p is the length of the flow guide nozzle, is the maximum flow rate of the melt flow at the outlet of the flow guide nozzle; The specific calculation formula for the time interval of the tilting furnace operation is: ； Wherein, is the time interval, A is the area at the outlet of the flow guide nozzle, , d is the inner diameter at the outlet of the flow guide nozzle, g is the acceleration due to gravity, p t is the air pressure in the smelting chamber, p a is the air pressure in the atomization chamber, ρ is the density of the alloy melt, l p is the length of the flow guide nozzle, is the maximum liquid level of the alloy melt in the tundish, is the maximum flow rate of the melt at the outlet of the flow guide nozzle, is the minimum flow rate of the melt at the outlet of the flow guide nozzle, D is the inner diameter size of the tundish.

6. An electronic device, characterized in that, It includes a processor and a memory. The memory stores a computer program executable by the processor. When the processor executes the computer program, it runs the steps in the tilting operation control method according to any one of claims 1-4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it runs the steps in the tilting operation control method according to any one of claims 1-4.

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