Electromagnetic control-based melt impact method liquid metal 3D printing jet device and method

Abstract

The application belongs to the technical field of 3D printing, and particularly relates to a melt impact method liquid metal 3D printing jet device and method based on electromagnetic control, which comprises a metal liquid supplementing device, a jet pipeline, a discharging device, an electromagnetic coil, an electromagnetic main control equipment, a jetting sensor, a monitoring equipment and a cooling platform, the monitoring equipment comprises a main controller and a man-machine interaction module; the metal liquid supplementing device comprises a melting furnace; a sealing cover is arranged on the melting furnace; one end of the jet pipeline is communicated with the melting furnace, and the other end is communicated with the discharging device; the electromagnetic coil is sleeved on the periphery of the jet pipeline; the cooling platform is used for cooling; the electromagnetic coil is in communication connection with the electromagnetic main control equipment; the jetting sensor is installed on the outlet side of the discharging device, and the jetting sensor and the electromagnetic main control equipment are in communication connection with the main controller, which helps to ensure appropriate jetting speed and stable controllable melt impact effect, and avoids damaging the surface of the equipment.

Description

Technical Field

[0001] This application belongs to the field of 3D printing technology, specifically relating to a liquid metal 3D printing jet device and method based on electromagnetically controlled melt impact method. Background Technology

[0002] With the continuous exploration of metal 3D printing technology, direct liquid printing has become an important method for preparing metal castings and ingots. Melt impact printing, a type of liquid metal 3D printing technology, utilizes a high-speed jet or metal droplets to reciprocate and scan molten metal, forming high-performance castings, ingots, or composite materials. The core of this technology is to refine grains by stirring and impacting the molten metal pool, utilizing the principle of grain proliferation, thereby obtaining castings, ingots, or composite materials with fine microstructure, uniform composition, and excellent performance.

[0003] In the melt impact 3D printing process of liquid metal, the speed and on / off control of the jet are key factors affecting product quality. The appropriateness of the jet speed directly affects the printing effect: if the jet speed is too fast, excessive stirring and impact force can easily introduce impurities and gases into the product, resulting in a defective product or severely impacting its performance; if the jet speed is too slow, the melt impact force is insufficient to stir the molten pool, and it may also cause defects such as cold shuts and porosity due to excessively rapid cooling. Currently, the control of jet velocity in melt impact 3D printing of liquid metal is generally achieved by increasing or decreasing the pressure inside the metal furnace, which controls the jet velocity and its switching. However, during pressure increase or decrease, pressure changes can easily lead to instability in the hydraulic head of the metal, causing instantaneous fluctuations in jet velocity and affecting the continuity of the spray. In addition, pressure increase operations increase the mechanical load on pipes and valves, leading to fatigue damage or leakage risks. Improper control during pressure decrease may create negative pressure areas, inducing cavitation (such as bubble collapse) and damaging the equipment surface. Summary of the Invention

[0004] In order to solve the technical problems existing in the background art, the present invention provides a liquid metal 3D printing jet device and method based on electromagnetic control melt impact method.

[0005] In a first aspect, the present invention provides a liquid metal 3D printing jet device based on electromagnetic control using melt impact method, comprising: a liquid metal replenishment device, a jet pipe, a discharge device, an electromagnetic coil, an electromagnetic main control device, a jet sensor, a monitoring device, and a cooling platform; The monitoring equipment includes a main controller, which is connected to a human-machine interface module and an alarm. The human-computer interaction module is used to set parameters; The molten metal replenishment device includes a melting furnace 3 for melting metal into molten metal 4; a sealing cover 1 is provided on the melting furnace 3 to seal the melting furnace 3; and a molten metal outlet is provided on the melting furnace for discharging the molten metal. One end of the jet pipe 10 is connected to the molten metal outlet on the melting furnace 3; the other end of the jet pipe (10) is connected to the discharge device. The electromagnetic coil 17 is sleeved on the periphery of the jet pipe 10 near the discharge device; the electromagnetic coil 17 is used to generate electromagnetic thrust, and the electromagnetic thrust is used to control the spray speed of the molten metal 4 from the discharge device and the spray switch. A molten pool is provided on the cooling platform 21, which is located below the discharge device. The cooling platform 21 is used to cool the molten metal sprayed into the molten pool by the discharge device and solidify it into a shaped part 20. The electromagnetic coil 17 is communicatively connected to the electromagnetic main control device 13; the electromagnetic main control device 13 is also communicatively connected to the main controller. The injection sensor 15 is installed on the outlet side of the discharge device to monitor the injection speed in real time. The injection sensor 15 is connected to the main controller for communication.

[0006] Furthermore, the main controller is connected to heating control equipment; The jet pipe 10 includes a cast steel pipe body 8 for supporting function; the interior of the cast steel pipe body 8 is coated with boron nitride paint 9, and the exterior of the cast steel pipe body 8 is covered with a heating jacket 7; the exterior of the heating jacket 7 is covered with heat insulation cotton 6, and the heat insulation cotton 6 is covered with a stainless steel shell. The heating control device is also connected to the heating jacket.

[0007] Furthermore, a ball valve 11 is also provided on the jet pipe 10. The ball valve 11 is used to control the flow of molten metal 4 by rotating the ball inside the jet pipe 10.

[0008] Furthermore, the discharge device includes a liquid storage chamber 16, which is connected to the jet pipe 10. The liquid storage chamber 16 is equipped with a nozzle 18 and a baffle switch 22 for controlling the opening and closing of the nozzle. The molten metal 4 is transported to the liquid storage cavity 16 through the jet pipe 10, and is ejected from the nozzle 18 as a jet 19 under the action of electromagnetic thrust. The baffle switch 22 is used to control the opening and closing of the nozzle.

[0009] Furthermore, a laser level gauge 2 is installed on the sealing cover 1 to monitor the metal level in the melting furnace 3. The laser level gauge 2 is connected to the main controller. The main controller is also connected to an alarm to trigger an alarm when the laser level gauge detects an abnormal liquid level.

[0010] Secondly, the present invention provides a liquid metal 3D printing jet method based on electromagnetically controlled melt impact, comprising the following steps: Step 1: Pre-set the spray target speed and melt the metal raw material into molten metal in a melting furnace; Step 2: The electromagnetic coil is energized by the electromagnetic main control equipment to generate electromagnetic thrust. The electromagnetic thrust is used to push the molten metal from the melting furnace through the jet pipe to the discharge device for spraying. Step 3: Real-time detection of jet speed, and based on the jet speed and the preset target jet speed, control the current flowing through the electromagnetic coil through the PID adjustment algorithm to achieve rapid response and real-time precise control of the jet speed.

[0011] Furthermore, the method also includes: The temperature of the molten pool during the printing process is collected in real time by an infrared thermometer, and the main controller controls the direction of the current in the electromagnetic coil based on the temperature of the molten pool.

[0012] Furthermore, the method also includes: Based on the actual situation, the target temperature of the heating main control device is input to the main controller through the human-machine interaction module, so that the main controller sends a temperature adjustment command to the heating control device based on the target temperature, and the heating control device adjusts the heating power of the heating jacket based on the received temperature adjustment command.

[0013] Thirdly, the present invention provides a computer-readable storage medium including a stored program that, when the program is running, controls the electrical equipment where the computer-readable storage medium is located to execute the above-described electromagnetically controlled melt impact method for liquid metal 3D printing jetting.

[0014] The beneficial effects of this invention are as follows: (1) The present invention adjusts the jet speed by electromagnetic force and has a self-feedback PID control system to ensure a suitable jet speed and a stable and controllable melt impact, while avoiding damage to the equipment surface; (2) By using non-mechanical switch control, the jet can be opened and closed quickly, ensuring precise control of heat input during the solidification process of castings or ingots, thereby achieving stable and controllable solidification process. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0016] Figure 1 This is a schematic diagram of the electromagnetically controlled melt impact method liquid metal 3D printing jet device of the present invention. Figure 2 This is a schematic diagram of the jet pipe structure of the present invention; Figure 3 This is an electrical schematic diagram of the electromagnetically controlled melt impact liquid metal 3D printing jet device of the present invention. Figure 4 This is a flowchart of the electromagnetically controlled melt impact method for liquid metal 3D printing jetting according to the present invention.

[0017] 1-Sealing cap; 2-Laser level gauge; 3-Melting furnace; 4-Molten metal; 5-Stainless steel outer shell; 6-Insulation cotton; 7-Heating jacket; 8-Cast steel pipe body; 9-Boron nitride coating; 10-Jet pipe; 11-Ball valve; 12-Heating control equipment; 13-Electromagnetic main control equipment; 14-Main controller; 15-Doppler velocimeter; 16-Small liquid storage cavity; 17-Electromagnetic coil; 18-Nozzle; 19-Jet; 20-Formed part; 21-Cooling platform; 22-Baffle switch; 23-Infrared thermometer; 24-Human machine interaction module; 25-Alarm. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, each technical and scientific term used in these embodiments has the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0022] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0023] Example 1: like Figure 1 As shown, this embodiment provides a liquid metal 3D printing jet device based on electromagnetic control using melt impact method, including: a liquid metal replenishment device, a jet pipe, a discharge device, a heating device, an electromagnetic coil 17, an electromagnetic main control device 13, a heating control device 12, a jet sensor and monitoring device, and a cooling platform 21; wherein, the jet sensor adopts a Doppler velocimeter 15; The monitoring equipment includes a main controller 14, which is connected to a human-machine interface module 24 and an alarm 25. The molten metal replenishment device includes a melting furnace 3 for melting metal into molten metal 4; the melting furnace 3 is provided with a sealing cover 1 to seal the melting furnace 1; a laser level gauge 2 is provided on the sealing cover 1 to monitor the molten metal level in the melting furnace 3; and the melting furnace 3 is provided with a molten metal outlet to discharge the molten metal.

[0024] One end of the jet pipe 10 is connected to the molten metal outlet on the melting furnace 3; the other end of the jet pipe 10 is connected to the discharge device.

[0025] like Figure 2 As shown, the jet pipe 10 includes a cast steel pipe body 8 for supporting function; the interior of the cast steel pipe body 8 is coated with boron nitride paint 9, and a heating jacket 7 is fitted over the exterior of the cast steel pipe body 8; the heating jacket 7 is covered with insulation cotton 6, and the insulation cotton 6 is covered with a stainless steel shell 5. The boron nitride paint 9 has high temperature resistance and anti-adhesion properties, preventing the molten metal 4 from adhering to the inner wall of the jet pipe 10; the heating jacket 7 is used to maintain the temperature of the molten metal 4 inside the jet pipe 10; the insulation cotton 6 is used to reduce heat loss of the molten metal 4; and the stainless steel shell 5 is used to enhance the overall strength of the jet pipe 10.

[0026] The heating jacket 7 is communicatively connected to the heating control device 12 so that the heating power of the heating jacket 7 can be adjusted by the heating control device 12 to maintain the temperature stability of the molten metal 4 in the jet pipe 10 and ensure that the spraying temperature of the molten metal 4 meets the process requirements. The heating power can be adjusted according to the characteristics of the metal material and the process requirements to adapt to the printing needs of different metal materials.

[0027] The multi-layered structure of the jet pipe 10 (internal boron nitride coating 9 - cast steel pipe body 8 - heating jacket 7 - insulation cotton 6 - stainless steel outer shell 5) effectively reduces heat loss.

[0028] A ball valve 11 is also provided on the jet pipe 10. The ball valve 11 is used to control the flow of molten metal 4 by rotating the ball inside the jet pipe 10. When the handle of the ball valve 11 is rotated 90 degrees, the opening of the ball is aligned with the flow direction of the molten metal 4 inside the jet pipe 10, thereby allowing the molten metal to pass through. Conversely, when the opening of the ball is perpendicular to the flow direction of the molten metal 4, the ball valve 11 is closed and the molten metal 4 is cut off.

[0029] The electromagnetic coil 17 is sleeved on the periphery of the jet pipe 10 near the discharge device; the electromagnetic coil 17 is used to generate electromagnetic thrust, and the electromagnetic thrust controls the spray speed of the molten metal 4 from the discharge device and the switching of the jet 19.

[0030] The electromagnetic coil 17 is communicatively connected to the electromagnetic main control device 13, and the electromagnetic main control device 13 adjusts the magnitude of the electromagnetic thrust and the direction of the current generated by the electromagnetic coil 17.

[0031] The discharge device includes a liquid storage chamber 16, which is connected to a jet pipe 10. The liquid storage chamber 16 is equipped with a nozzle 18 and a baffle switch 22 for controlling the opening and closing of the nozzle. Molten metal 4 is transported to the liquid storage chamber 16 via the jet pipe 10 and ejected as a jet 19 from the nozzle 18 under electromagnetic thrust. The baffle switch 22 controls the opening and closing of the nozzle, thus providing dual protection for nozzle operation in conjunction with electromagnetic control.

[0032] The cooling platform 21 is located below the molten pool below the nozzle 18 and is used to cool the molten metal sprayed into the molten pool by the nozzle 18 and solidify it into a shaped part 20.

[0033] A Doppler velocimeter 15 is installed on the outlet side of nozzle 18 to monitor the jet velocity of jet 19 in real time.

[0034] An infrared thermometer 23 is installed above the cooling platform 21 to collect the temperature of the molten pool in real time during the printing process.

[0035] like Figure 3 As shown, the main controller is connected to the laser level gauge 2, Doppler velocimeter 15, infrared thermometer 23, heating control device 12 and electromagnetic main control device 13 through control lines, and realizes the issuance of commands and status feedback based on PID algorithm, so that the devices work together to complete the injection and control process of liquid metal.

[0036] Example 2: This embodiment provides a liquid metal 3D printing jet method based on electromagnetically controlled melt impact, such as... Figure 4 As shown, it includes the following steps: S1: Preset the spray target speed and melt the metal raw material into molten metal in the melting furnace, while opening the ball valve on the jet pipe; Specifically, it includes the following steps: S1-1: Based on actual needs, spray the target speed to the main controller facility through the human-machine interaction module; S1-2: Melting the metal raw materials into molten metal in a melting furnace; S1-3: Real-time detection of the molten metal level in the melting furnace using a laser level gauge; S1-4: The main controller will detect the liquid level and display it through the human-machine interaction module, and control the alarm to sound when the liquid level is lower than the preset liquid level threshold; S1-5: Rotate the ball valve handle 90 degrees to align the opening of the ball valve's ball with the flow direction of the pipeline, thereby allowing fluid to pass through.

[0037] S2: The electromagnetic coil is energized by the electromagnetic main control equipment to generate electromagnetic thrust, and the molten metal is pushed from the melting furnace to the discharge device through the jet pipe for spraying. S2-1: Apply coil voltage to both ends of the electromagnetic coil through the electromagnetic main control device (i.e., energize the electromagnetic coil through the electromagnetic main control device), so that current flows through the electromagnetic coil, the electromagnetic coil generates an alternating magnetic field, and the molten metal, as a conductive medium, generates an induced current in the alternating magnetic field. The induced current interacts with the alternating magnetic field to generate electromagnetic thrust (Lorentz force). S2-2: By controlling the current of the electromagnetic coil through the electromagnetic main control equipment, the magnitude of the electromagnetic thrust generated by the electromagnetic coil is changed, thereby realizing the adjustment of the jet velocity.

[0038] Specifically, the magnitude of the electromagnetic thrust F is proportional to the square of the coil current I flowing through the electromagnetic coil, that is... ,in, This is a proportionality coefficient, which is related to fixed parameters such as the number of coil turns, coil radius, and conductivity of the molten metal. The coil current I and the voltage U across the coil (i.e., the voltage input from the main electromagnetic control device to the electromagnetic coil) follow Ohm's law: ,in, R is the back electromotive force of the electromagnetic coil, and R is the resistance of the electromagnetic coil. When the resistance R of the electromagnetic coil is fixed, an increase in the voltage U across the coil will directly lead to an increase in the coil current, which in turn will increase the electromagnetic thrust quadratically, ultimately accelerating the jet velocity. Conversely, a decrease in the voltage U across the coil will reduce the coil current I, weaken the thrust, and slow down the jet velocity.

[0039] S3: Based on the actual situation and different aluminum alloy materials, the target temperature of the heating main control device is input to the main controller through the human-machine interaction module. The main controller then sends a temperature adjustment command to the heating control device based on the target temperature, and the heating control device adjusts the heating power of the heating jacket based on the received temperature adjustment command. S4: Real-time detection of jet speed, and based on the jet speed and the preset target jet speed, control the magnitude and phase of the current flowing through the electromagnetic coil through the PID adjustment algorithm to achieve rapid response and real-time precise control of the jet speed; Specifically, the following steps are included: S4-1: Real-time detection of jet speed via Doppler radar speedometer, and real-time transmission of the detected jet speed to the main controller; S4-2: The main controller calculates the deviation between the preset injection target speed and the real-time injection speed. Based on the magnitude and trend of the deviation, it automatically adjusts the current magnitude and phase according to the PID regulation law to stabilize the jet speed within the range required by the process. A: Based on the preset jet target speed of the main controller. And the jet velocity ejected from the nozzle, which is collected in real time by a Doppler velocimeter. The velocity deviation e(k) is calculated. ; in, To the speed of the spray target, Let be the spray velocity at the k-th sampling. This represents the velocity deviation during the k-th sampling.

[0040] B: The formula for calculating the proportional term is as follows:

[0041] in, This is the proportional coefficient of the PID controller; the proportional term directly responds to the current deviation and is the "fast response part" of the adjustment.

[0042] C: Calculate the integral term of the cumulative historical deviation to eliminate the static error adjustment deviation correction part. The calculation formula is as follows: C1: Calculate the cumulative sum of deviations: ,in, , representing the cumulative sum of deviations from the 0th to the (k-1)th sampling period; C2: The integral term is calculated as follows: ,in, These are the integral coefficients of the PID controller; The sampling period.

[0043] D: Calculate the differential term that reflects the trend of deviation change to suppress overshoot. The formula is as follows: ; in, These are the PID differential coefficients; the differential term is the stable part of the regulation.

[0044] E: By superimposing the proportional, integral, and derivative terms, we obtain the target value of the PID output current for the k-th sample: ; The proportional term in the PID algorithm amplifies the deviation in real time, ensuring rapid correction when speed fluctuates; the integral term accumulates the deviation, eliminating "speed offset" caused by changes in molten metal viscosity and fluctuations in pipeline resistance; the derivative term predicts the trend of deviation changes, avoiding "overshoot" during speed correction and ensuring stability.

[0045] S5: The temperature of the molten pool during the printing process is collected in real time by an infrared thermometer, and the main controller controls the current direction of the electromagnetic coil based on the temperature of the molten pool. Specifically, by changing the direction of the current in the electromagnetic coil, the direction of the magnetic force that generates the magnetic field is reversed, causing the electromagnetic thrust to reverse and hindering the flow of molten metal, thus closing the nozzle; when the current is restored to the positive direction, the direction of the magnetic force is restored, and the thrust pushes the molten metal to flow, thus opening the nozzle and achieving the purpose of controlling the opening and closing of the nozzle. More specifically, it includes the following steps: S5-1: The main controller acquires the molten pool temperature monitored in real time by an infrared thermometer on the cooling platform; S5-2: When the main controller obtains a molten pool temperature higher than the preset molten pool temperature threshold, it controls the baffle switch to close and controls the electromagnetic main control device to apply a reverse current command to the electromagnetic coil, so that the current device switches the current direction, the electromagnetic coil generates a reverse electromagnetic thrust, and prevents the molten metal from flowing to the nozzle, and the jet stops.

[0046] S5-3: When the main controller obtains a molten pool temperature lower than the preset molten pool temperature threshold, it controls the baffle switch to open and sends a positive current command to the electromagnetic main control device. The electromagnetic main control device restores the positive current, and the electromagnetic coil generates a positive electromagnetic thrust to push the molten metal out of the nozzle, resumes spraying, and continues to perform spraying scanning and heat input.

[0047] Example 3: This embodiment provides a computer-readable storage medium including a stored program, wherein, when the program is running, it controls the computer-readable storage medium to execute the electromagnetically controlled melt impact method for liquid metal 3D printing jetting described in Embodiment 2.

[0048] The same or similar parts between the various embodiments in this specification can be referred to mutually. In particular, the terminal embodiments are basically similar to the method embodiments, so the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

[0049] In the embodiments provided by this invention, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the system embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between systems or units may be electrical, mechanical, or other forms.

[0050] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0051] Additionally, it should be noted that the flowcharts in the accompanying drawings illustrate methods according to embodiments of this disclosure. In the descriptions corresponding to the flowcharts or block diagrams in the drawings, the operations or steps corresponding to different blocks may occur in a different order than disclosed in the description; sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, or sometimes in reverse order, depending on the function involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0052] 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 liquid metal 3D printing jet device based on electromagnetically controlled melt impact method, characterized in that, include: Metal molten liquid replenishment device, jet pipe, discharge device, electromagnetic coil, electromagnetic main control equipment, spray sensor, monitoring equipment and cooling platform; The monitoring equipment includes a main controller, which is connected to a human-machine interface module and an alarm. The human-computer interaction module is used to set parameters; The molten metal replenishment device includes a melting furnace (3) for melting metal into molten metal (4); a sealing cover (1) is provided on the melting furnace (3) to seal the melting furnace (3); and a molten metal outlet is provided on the melting furnace to discharge the molten metal. One end of the jet pipe (10) is connected to the molten metal outlet on the melting furnace (3); the other end of the jet pipe (10) is connected to the discharge device. The electromagnetic coil (17) is sleeved on the periphery of one end of the jet pipe (10) near the discharge device; the electromagnetic coil (17) is used to generate electromagnetic thrust, and the electromagnetic thrust controls the spray speed and spray switch of the molten metal (4) from the discharge device. A molten pool is provided on the cooling platform (21), which is located below the discharge device. The cooling platform (21) is used to cool the molten metal sprayed into the molten pool by the discharge device and solidify it into a shaped part (20). The electromagnetic coil (17) is communicatively connected to the electromagnetic main control device (13); the electromagnetic main control device (13) is also communicatively connected to the main controller; The injection sensor (15) is installed on the outlet side of the discharge device to monitor the injection speed in real time; The injection sensor (15) is connected to the main controller for communication.

2. The electromagnetically controlled melt impact liquid metal 3D printing jet device according to claim 1, characterized in that, The main controller is connected to heating control equipment; The jet pipe (10) includes a cast steel pipe body (8) for supporting function; the interior of the cast steel pipe body (8) is coated with boron nitride paint (9), and the exterior of the cast steel pipe body (8) is fitted with a heating jacket (7); the exterior of the heating jacket (7) is covered with insulation cotton (6), and the insulation cotton (6) is covered with a stainless steel shell. The heating control device is also connected to the heating jacket.

3. The electromagnetically controlled melt impact liquid metal 3D printing jet device according to claim 1, characterized in that, A ball valve (11) is also provided on the jet pipe (10). The ball valve (11) is used to control the flow of molten metal (4) by rotating the ball inside the jet pipe (10).

4. The electromagnetically controlled melt impact liquid metal 3D printing jet device according to claim 1, characterized in that, The discharge device includes a liquid storage chamber (16), which is connected to the jet pipe (10). The liquid storage chamber (16) is equipped with a nozzle (18) and a baffle switch (22) for controlling the opening and closing of the nozzle. The molten metal (4) is transported to the liquid storage cavity (16) through the jet pipe (10) and sprayed out from the nozzle (18) as a jet (19) under the action of electromagnetic thrust. The baffle switch (22) is used to control the opening and closing of the nozzle.

5. The electromagnetically controlled melt impact liquid metal 3D printing jet device according to claim 1, characterized in that, A laser level gauge (2) is installed on the sealing cover (1) to monitor the metal level in the melting furnace (3). The laser level gauge (2) is connected to the main controller. The main controller is also connected to an alarm to trigger an alarm when the laser level gauge detects an abnormal level.

6. A liquid metal 3D printing jet method based on electromagnetically controlled melt impact, characterized in that, Includes the following steps: Step 1: Pre-set the spray target speed and melt the metal raw material into molten metal in a melting furnace; Step 2: The electromagnetic coil is energized by the electromagnetic main control equipment to generate electromagnetic thrust. The electromagnetic thrust is used to push the molten metal from the melting furnace through the jet pipe to the discharge device for spraying. Step 3: Real-time detection of jet speed, and based on the jet speed and the preset target jet speed, control the current flowing through the electromagnetic coil through the PID adjustment algorithm to achieve rapid response and real-time precise control of the jet speed.

7. The electromagnetically controlled melt impact method for liquid metal 3D printing jetting according to claim 6, characterized in that, The method further includes: The temperature of the molten pool during the printing process is collected in real time by an infrared thermometer, and the main controller controls the direction of the current in the electromagnetic coil based on the temperature of the molten pool.

8. The electromagnetically controlled melt impact method for liquid metal 3D printing jetting according to claim 6, characterized in that, The method further includes: Based on the actual situation, the target temperature of the heating main control device is input to the main controller through the human-machine interaction module, so that the main controller sends a temperature adjustment command to the heating control device based on the target temperature, and the heating control device adjusts the heating power of the heating jacket based on the received temperature adjustment command.

9. A computer-readable storage medium comprising a stored program, characterized in that, During program execution, the power equipment containing the computer-readable storage medium is controlled to perform the electromagnetically controlled melt impact liquid metal 3D printing jet method as described in any one of claims 6 to 8.

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