Method for feeding a granular melt forming process in additive manufacturing

Abstract

The present application provides a feeding method for particle melting forming process in additive manufacturing, which is processed by a conveying mechanism, the conveying mechanism comprises a vibrating disc, one side of the vibrating disc is provided with a feeding plate, a feeding channel is formed in the feeding plate, heating mechanisms are arranged on both sides of the feeding channel, the heating mechanisms comprise microwave heating plates, air supply mechanisms are arranged at the bottom of the feeding channel, auxiliary air supply mechanisms are arranged at the top of the feeding channel; further comprising a sensor mechanism, the sensor mechanism comprises a temperature sensor, an oil content sensor and a water content sensor, the temperature sensor detects the temperature of the particles, the oil content sensor detects the oil content of the particles, and the water content sensor detects the water content of the particles, which is used for pretreatment of the particles before melting forming, and the treatment effect is good.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, and more specifically to a feeding method for particle melting and molding processes in additive manufacturing. Background Technology

[0002] Fused particle manufacturing is an additive manufacturing technology based on granular materials. It uses thermal energy to melt granular materials such as plastics, metals, or ceramics and deposit them layer by layer to form a finished product. Unlike traditional fused deposition modeling (FDM) which uses filaments, fused particle manufacturing uses granules directly as raw materials, resulting in higher material utilization and wider material adaptability. Existing fused particle technologies often neglect the process of dealing with oil and water on the particle surface. The presence of oil and water significantly affects the melting behavior and molding quality of the particles. Oil contamination hinders effective bonding between particles, reducing interlayer bonding strength and leading to decreased strength of the molded part. Meanwhile, moisture may evaporate rapidly during the high-temperature melting process, creating bubbles or pores that could cause defects in the internal structure.

[0003] For example, patent document with patent application number 202510749478.2 and publication date of July 8, 2025 discloses a granular 3D printer with cavity temperature, including a printer body. A fan is provided on one side of the printer body, and a hot and cold air system is provided on the opposite side. A filter air outlet is provided above the hot and cold air system. A vacuum adsorption platform is provided in the cavity of the printer body. A liftable bracket is provided above the vacuum adsorption platform. The bracket is provided with an X-axis and a Y-axis. A printer head is provided on the X-axis. The printer head can reciprocate along the X-axis. When the four lead screws rotate synchronously, they drive the bracket to rise and fall vertically along the optical axis. This granular 3D printer with cavity temperature can adjust the hot and cold air circulation according to the characteristics of the granules, which helps to cool the model and maintain the cavity temperature. In addition, the stable lifting of the bracket can improve the printing accuracy. At the same time, the setting of the accordion cloth can also improve the heating efficiency of the cavity, making it suitable for widespread use.

[0004] The above literature does not dry the particles before melting them, nor does it remove oil. Furthermore, it does not disclose the specific structure of the drying device. During ordinary high-temperature drying, oil and moisture are generated in the molten particles. When these oily and moist particles are melted and output to the printhead, the oil and moisture accumulate at the printhead, forming coke and deposits. This gradual accumulation of substances can clog the printhead, affecting the continuity and stability of printing. Moreover, the oil hinders effective bonding between particles. During the melting process, unremoved oil forms a barrier film on the particle surface, interfering with molecular diffusion and chemical bonding between particles, leading to a significant decrease in interlayer bonding strength. Summary of the Invention

[0005] This invention provides a feeding method for particle melting and forming processes in additive manufacturing, which removes oil and water from the particles before melting and forming, facilitating feeding and subsequent processing.

[0006] To achieve the above objectives, the technical solution of the present invention is: a feeding method for particle melting and forming processes in additive manufacturing, wherein the material is processed by a conveying mechanism, the conveying mechanism including a vibratory feeder, a feeding pipe provided on one side of the vibratory feeder, the feeding pipe being hollow to form a feeding channel, and an air supply mechanism, an auxiliary air supply mechanism, and a heating mechanism being provided on the feeding channel; the specific steps include:

[0007] S1 Preset particle target temperature T target In addition to the temperature compensation coefficient and the base wind speed of the current air supply mechanism. Particle target moisture content Oil content of particulate matter Detect the current temperature T of the particles current According to the target temperature T of the particles target and the current temperature T of the particles current And the temperature compensation coefficient determines the current temperature deviation;

[0008] S2 is based on the current temperature deviation and the base wind speed. The air velocity of the air supply mechanism after temperature compensation is obtained;

[0009] S3 determines the current moisture content and oil content of the particles, and determines the air velocity of the air supply mechanism after moisture content adjustment based on the difference between the current moisture content and the target moisture content of the particles, the preset moisture content adjustment coefficient, and the air velocity of the air supply mechanism after temperature compensation; and determines the air velocity of the air supply mechanism after oil content adjustment based on the difference between the current oil content and the target oil content of the particles, the preset oil content adjustment coefficient, and the air velocity of the air supply mechanism after temperature compensation.

[0010] S4 selects the wind speed of the air supply mechanism after adjusting the oil content or the wind speed of the air supply mechanism after adjusting the water content as the base wind speed based on the relationship between the current oil content and the target oil content.

[0011] S5 determines the coordinated wind speed by using the oblique wind speed of the auxiliary air supply mechanism and the wind speed of the air supply mechanism, and compares the coordinated wind speed with the base wind speed obtained in step S4. If the wind speeds are inconsistent, the coordinated wind speed is adjusted according to the preset wind speed adjustment parameters, and the base wind speed is determined based on the adjusted coordinated wind speed for air supply until the current water content and current oil content are detected to reach the target water content and oil content.

[0012] The above setup first uses a vibratory feeder to deliver the particles into the feeding channel through the feeding pipe. Then, an air supply mechanism and an auxiliary air supply mechanism separate moisture and oil molecules from the particles. The current temperature T of the particles is then detected. currentThen calculate the target temperature T of the particles. target and the current temperature T of the particles current The current temperature deviation between the two is obtained. The base wind speed of the pre-set air supply mechanism The base wind speed of the air supply mechanism according to The temperature-compensated airflow velocity of the air supply mechanism is obtained by adjusting the values. Since the lower the particle temperature, the less likely the oil and water on the material surface will evaporate, a larger airflow is needed to contact the particles. The basic airflow velocity of the air supply mechanism is initially determined by the relationship between temperature and airflow velocity. Then, air is supplied by the air supply mechanism and auxiliary air supply mechanism at the basic airflow velocity. The airflow velocity of the air supply mechanism is then adjusted according to the moisture content and oil content of the particles. Based on the relationship between the moisture content and oil content of the particles, the adjusted airflow velocity of the air supply mechanism is used as the basic airflow velocity to calculate the airflow velocities in the coordinated vertical and horizontal directions. The overall coordinated wind speed is obtained. If the coordinated wind speed is inconsistent with the base wind speed obtained in step S4, it indicates that the base wind speed adjusted based on temperature and wind speed cannot meet the requirements of particle moisture and oil content. Therefore, the system wind speed is adjusted by preset wind speed adjustment parameters, and then further adjusted by using the adjusted coordinated wind speed as the base wind speed until the moisture and oil content are met. This ensures that the base wind speed adjusted based on temperature and wind speed can be adjusted according to moisture and oil content, thereby ensuring that the requirements of moisture and oil content are met during the transportation process.

[0013] Furthermore, in step S1, "based on the target particle temperature T..." target and the current temperature T of the particles current "And the temperature compensation coefficient determines the current temperature deviation" includes: In step S2, "based on the current temperature deviation and the basic wind speed..." The temperature-compensated air supply unit wind speed includes: After temperature compensation, the air supply mechanism wind speed K T This is the temperature compensation coefficient.

[0014] The above settings determine the initial air velocity of the air supply mechanism by using the difference between the target temperature and the current temperature, as well as the temperature compensation coefficient, which is convenient for determination.

[0015] Furthermore, step S3, "determining the air velocity of the air supply mechanism after moisture content adjustment based on the difference between the current moisture content of the particles and the target moisture content of the particles, the preset moisture content adjustment coefficient, and the air velocity of the air supply mechanism after temperature compensation," includes: ; For the target moisture content of particles, This represents the current moisture content of the particles; The preset moisture content adjustment coefficient;

[0016] "Determining the airflow speed of the air supply mechanism after oil content adjustment based on the difference between the current oil content and the target oil content of the particles, the preset oil content adjustment coefficient, and the airflow speed of the air supply mechanism after temperature compensation" includes: ; The target oil content for particles. This represents the current oil content of the particles. This is the preset oil content adjustment coefficient.

[0017] The above settings determine the wind speed of the air supply structure after adjustment by using the difference between the target moisture content and the current moisture content and the preset moisture content adjustment coefficient, and by using the difference between the target oil content and the current oil content and the preset oil content adjustment coefficient, thus enabling convenient and accurate adjustment of the wind speed.

[0018] Furthermore, step S4, "selecting the wind speed of the air supply mechanism after adjusting the oil content or the wind speed of the air supply mechanism after adjusting the water content as the base wind speed based on the relationship between the current oil content and the target oil content," includes: if the current... ,choose wind speed as The wind speed, if O current ≤O target Then choose wind speed as The wind speed.

[0019] The above settings allow for the simultaneous satisfaction of both oil and water content requirements, since water content can generally be easily met through heating and other methods. By prioritizing oil content, the system can handle situations with a suitable wind speed when the current oil content is high, and vice versa.

[0020] Furthermore, step S5 includes: presetting the tilt angle A between the auxiliary air supply mechanism and the feeding channel, and determining the horizontal wind speed of the auxiliary air supply mechanism. and vertical wind speed Determine the coordinated horizontal wind speed of the auxiliary air supply mechanism and the main air supply mechanism. =V s,y = and coordinated vertical wind speed = + And the coordinated wind speed was obtained. .

[0021] The above settings allow us to extract the horizontal and vertical components by using trigonometric functions based on the tilt angle between the auxiliary air supply mechanism and the feeding channel, thus ultimately obtaining the total coordinated wind speed of the air supply mechanism and the auxiliary air supply mechanism.

[0022] Furthermore, step S5 also includes: comparing the coordinated wind speed with the base wind speed in step S4; if the base wind speed and the coordinated wind speed are not within a preset range, then obtaining the corrected coordinated vertical wind speed based on the base wind speed. , To balance the vertical component coefficients of the air supply mechanism and the auxiliary air supply mechanism, the adjusted coordinated vertical wind speed error value is then obtained. The corrected horizontal wind speed is obtained based on the base wind speed. ,in β This is the coefficient of the horizontal component of the basic wind speed of the air supply mechanism with respect to particles. γ To assist the air supply mechanism in determining the horizontal component coefficient of particles; then, the adjusted cooperative horizontal wind speed error value is obtained. And obtain the comprehensive error value. Finally, the adjusted base wind speed is determined based on the comprehensive error value. ; , This is a preset base wind speed revision value.

[0023] If the coordinated wind speed differs from the obtained base wind speed, the vertical and horizontal components of the base wind speed will be adjusted using a preset wind speed adjustment value. The adjusted combined wind speed will then be used as the base wind speed for further adjustment until the water and oil content meet the requirements.

[0024] Furthermore, the feeding pipe includes an inlet pipe, a discharge pipe, and an outlet pipe. One side of the outlet pipe is connected to the vibratory feeder, and the other side of the outlet pipe is connected to one side of the discharge pipe. The other side of the discharge pipe is connected to the outlet pipe. The heating mechanism includes a microwave heating plate. The feeding pipe is also equipped with a detection mechanism, which includes a humidity sensor and a PID oil vapor sensor.

[0025] The above setup connects the discharge pipe to the vibrating plate, allowing the particles to enter the discharge pipe in an orderly and stable manner through the vibration of the vibrating plate, avoiding particle accumulation or blockage and ensuring smooth particle conveying. Simultaneously, the connection between the discharge pipe and the feed pipe ensures smooth transition of particles during conveying, further improving the continuity and reliability of feeding. The working principle of the microwave heating plate for dehydration and degreasing is to use microwave energy to polarize and rapidly oscillate water molecules in the particles in a high-frequency electromagnetic field, generating frictional heat energy, thereby rapidly evaporating the water and reducing the viscosity and separating the grease.

[0026] The humidity sensor can detect the moisture content of particles under the air supply mechanism and the auxiliary air supply mechanism, while the PID oil vapor sensor can detect the oil content of particles under the air supply mechanism and the auxiliary air supply mechanism.

[0027] Furthermore, an air supply mechanism is uniformly arranged along the length of the bottom of the discharge pipe. The air supply mechanism includes an air supply pipe, which is arranged side by side along the width of the bottom of the discharge pipe.

[0028] The above setup, by evenly distributing air supply mechanisms at the bottom of the discharge pipe, includes air supply pipes that create a stable airflow, effectively supplying air to the particles. The parallel arrangement of the air supply pipes ensures a more uniform airflow distribution, effectively reducing particle accumulation, adhesion, or blockage during transport, and ensuring smooth and even passage of particles through the discharge pipe.

[0029] Furthermore, an installation plate is provided at the upper end of the discharge pipe; an auxiliary air supply mechanism is inclinedly provided on both sides along the length direction of the installation plate, the auxiliary air supply mechanism including a spiral nozzle, the spiral nozzle being inclinedly connected to the installation plate.

[0030] The above configuration includes an installation plate that provides a mounting position for the auxiliary blower mechanism and a stable support structure for the discharge pipe, which enhances the overall strength and stability of the discharge pipe. The combination of the spiral nozzle and the air supply pipe can provide a stable airflow for the particles in both vertical and horizontal directions, thereby optimizing the separation process of water molecules and oil molecules on the particles in multiple dimensions.

[0031] Furthermore, a first scraper is provided on one side of the feed pipe, and a second scraper is provided on the other side of the feed pipe. The first scraper and the second scraper are arranged alternately along the feeding channel direction.

[0032] With the above setup, the first and second scrapers are positioned at preset locations in the feed pipe, which can effectively remove large particles of impurities from the molten particles. Through the physical blocking and scraping action of the scrapers, these impurities can be separated from the particles. Attached Figure Description

[0033] Figure 1 This is the front view of the present invention.

[0034] Figure 2 Another perspective of the present invention Figure 1 .

[0035] Figure 3 Another perspective of the present invention Figure 2 .

[0036] Figure 4 Another perspective of the present invention Figure 4 .

[0037] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0038] Figure 6 This is a diagram of the air outlet structure of the auxiliary air supply mechanism in this invention.

[0039] Figure 7 This is a flowchart of the present invention.

[0040] Explanation of reference numerals: 1-Vibrating plate; 2-Feeding pipe; 21-Infeed pipe; 211-First scraper; 212-Second scraper; 22-Discharge pipe; 23-Outlet pipe; 24-Feeding channel; 3-Air supply mechanism; 31-Air supply pipe; 4-Auxiliary air supply mechanism; 41-Spiral nozzle; 5-Heating mechanism; 51-Microwave heating plate. Detailed Implementation

[0041] Example 1.

[0042] like Figure 1-7 As shown, the feeding method for particle melting and forming process in additive manufacturing is processed by a conveying mechanism. The conveying mechanism includes a vibratory plate 1, a feeding pipe 2 on one side of the vibratory plate 1, a hollow feeding channel 24 formed by the feeding pipe 2, heating mechanisms 5 on both sides of the feeding channel 24, the heating mechanisms 5 including microwave heating plates 51, an air supply mechanism 3 at the bottom of the feeding channel 24, and an auxiliary air supply mechanism 4 at the top of the feeding channel 24; and a temperature sensor, a sensor for detecting oil content, a sensor for detecting moisture content, and a wind speed sensor are installed in the feeding channel.

[0043] The specific steps of the feeding method include:

[0044] S1 Preset particle target temperature T target In addition to the temperature compensation coefficient and the base wind speed of the current air supply mechanism. Particle target moisture content Oil content of particulate matter Detect the current temperature T of the particles current According to the target temperature T of the particles target and the current temperature T of the detected particles current The current temperature deviation between the two is obtained. ;

[0045] S2 determines the base wind speed of the current air supply mechanism based on the table showing the correspondence between the current temperature deviation and the base wind speed of the current air supply mechanism. The air supply mechanism 3 will adjust according to the temperature deviation. Changes in base wind speed The air supply mechanism 3 wind speed after temperature compensation is obtained. K TThis is the temperature compensation coefficient;

[0046] S3, based on temperature compensation, delivers air at wind speed 3. The air velocity of the air supply mechanism after moisture content adjustment is obtained from the particle moisture content. ; ,in For the target moisture content of particles, This represents the current moisture content of the particles;

[0047] Based on the air supply mechanism 3 wind speed after moisture content adjustment The wind speed of the air supply mechanism after oil content adjustment was obtained. ,in The target oil content for particles. This represents the current oil content of the particles;

[0048] S4 determines the basic wind speed of the air supply mechanism 3. If the current ,choose wind speed as The wind speed, if O current <O target Then choose wind speed as wind speed;

[0049] S5 determines the horizontal wind speed of the auxiliary air supply mechanism 4 based on the oblique wind speed Vs. and vertical wind speed In this embodiment, A = 45°;

[0050] The coordinated horizontal wind speed of auxiliary air supply mechanism 4 and air supply mechanism 3 is obtained. and coordinated vertical wind speed ;where V g,y =V g,base Then, the effective coordinated wind speed is obtained. ;

[0051] If the difference between the coordinated wind speed and the base wind speed in step S4 is not within the preset range, for example, within 5, then adjust the coordinated wind speed according to step S5.1: the corrected coordinated vertical wind speed is then obtained based on the base wind speed. , To balance the vertical component coefficients of the air supply mechanism and the auxiliary air supply mechanism, the adjusted coordinated vertical wind speed error value is then obtained. The corrected cooperative horizontal wind speed error value is obtained based on the base wind speed. ,in β This is the coefficient of the horizontal component of the basic wind speed of the air supply mechanism with respect to particles. γ To assist the air supply mechanism in adjusting the horizontal component coefficient of particles; Then the adjusted cooperative horizontal wind speed error value is obtained. And obtain the comprehensive error value. Finally, the adjusted base wind speed is determined based on the comprehensive error value. ; , In this embodiment, to preset the base wind speed revision value, =0.8, =0.05, β It is 0.4. γ It is 0.3.

[0052] S5.2 Determine the base wind speed based on the adjusted coordinated wind speed and supply air. Repeat step S3 to detect the current water content and oil content. If the requirements are not met, perform further adjustments in steps S3-S5 until the current water content and oil content reach the target water content and oil content. If the requirements are met, no further adjustments are needed.

[0053] In one embodiment, a preset target particle temperature T is set. target =60° and a temperature compensation coefficient of 0.2 m / sper℃, the current base wind speed of the air supply mechanism =10m / s, target particle moisture content Wcurrent=4%;

[0054] calculate ;

[0055] Spiral nozzle angle Vs = 8 m / s;

[0056] Vcoop,x=8×cos(45°)=5.66m / s,Vcoop,y=−5.66+10.5=4.84m / s;

[0057] Vg,coop=7.45m / s;

[0058] =0.8×10.5-4.84=3.56m / s;

[0059] =0.4×10.5+0.3×5.66=5.898m / s; finally obtained =6.88;

[0060] =7.45+0.05×6.88=7.794 m / s.

[0061] like Figure 3-5As shown, the feeding pipe includes an inlet pipe 21, a discharge pipe 22, and an outlet pipe 23. One side of the outlet pipe 23 is connected to the vibrating plate 1, and the other side of the outlet pipe 23 is connected to one side of the discharge pipe 22. The other side of the discharge pipe 22 is connected to the outlet pipe 23. The outlet pipe 23 is connected to the vibrating plate 1, which, with the help of the vibration of the vibrating plate 1, allows the particles to enter the outlet pipe 23 in an orderly and stable manner, avoiding particle accumulation or blockage and ensuring smooth particle conveying. At the same time, the interconnection between the outlet pipe 23 and the discharge pipe 22 allows the particles to transition smoothly during the conveying process, further improving the continuity and reliability of the feeding.

[0062] An air supply mechanism 3 is evenly arranged along the length of the bottom of the discharge pipe 23. The air supply mechanism 3 includes an air supply pipe 31, which is arranged side by side along the width of the bottom of the discharge pipe 23. By evenly distributing the air supply mechanism 3 at the bottom of the discharge pipe 23, the air supply pipe 31 can form a stable airflow, which plays a good role in supplying air to the particles. The side-by-side arrangement of the air supply pipes 31 makes the airflow distribution more uniform, which can effectively reduce the accumulation, adhesion or blockage of particles during the conveying process, and ensure that the particles pass through the discharge pipe 23 smoothly and evenly.

[0063] The upper end of the discharge pipe 23 is also provided with a mounting plate, which provides an installation position for the auxiliary blower mechanism and provides a stable support structure for the discharge pipe 23, thereby enhancing the overall strength and stability of the discharge pipe 23.

[0064] An auxiliary air supply mechanism 4 is inclinedly arranged on both sides along the length of the mounting plate. The auxiliary air supply mechanism 4 includes a spiral nozzle 41, which is inclinedly connected to the mounting plate. The spiral nozzle 41 and the air supply pipe 31 are combined to provide a stable airflow for the particles in the vertical and horizontal directions, thereby optimizing the separation process of water molecules and oil molecules on the particles in multiple dimensions. In this embodiment, the spiral nozzle 42 is inclined at an angle of 45° to the mounting plate.

[0065] A first scraper 211 is provided on one side of the feed pipe 21, and a second scraper 212 is provided on the other side of the feed pipe 21. The first scraper 211 and the second scraper 212 are arranged alternately along the feeding direction of the feed pipe 21. The first scraper 211 and the second scraper 212 are set at a preset position in the feed pipe 21, which can effectively remove large particle impurities in the molten particles. Through the physical blocking and scraping action of the scraper, these impurities can be separated from the particles.

[0066] The feeding pipe is also equipped with a detection mechanism, which includes a humidity sensor and a PID oil vapor sensor. The humidity sensor can detect the moisture content of the particles under the air supply mechanism and the auxiliary air supply mechanism, and the PID oil vapor sensor can detect the oil content of the particles under the air supply mechanism and the auxiliary air supply mechanism.

[0067] The working principle of this invention is as follows: First, the particles are fed into the feeding channel through the feeding pipe by a vibratory feeder. Then, the moisture and oil molecules are separated from the particles by the air supply mechanism and the auxiliary air supply mechanism. The current temperature T of the particles is detected. current Then calculate the target temperature T of the particles. target and the current temperature T of the particles current The current temperature deviation between the two is obtained. The base wind speed of the pre-set air supply mechanism The base wind speed of the air supply mechanism according to The temperature-compensated airflow velocity of the air supply mechanism is obtained by adjusting the values. Since the lower the particle temperature, the less likely the oil and water on the material surface will evaporate, a larger airflow and air contact are required. The basic airflow velocity of the air supply mechanism is initially determined by the relationship between temperature and airflow velocity. Then, air is supplied by the air supply mechanism and auxiliary air supply mechanism at the basic airflow velocity. The airflow velocity of the air supply mechanism is then adjusted according to the moisture content and oil content of the particles. Based on the relationship between the moisture content and oil content of the particles, the adjusted airflow velocity of the air supply mechanism is used as the basic airflow velocity to calculate the airflow velocities in the coordinated vertical and horizontal directions. The overall coordinated wind speed is obtained. If the coordinated wind speed is inconsistent with the base wind speed obtained in step S4, it indicates that the base wind speed adjusted based on temperature and wind speed cannot meet the requirements of particle moisture and oil content. Therefore, the system wind speed is adjusted by preset wind speed adjustment parameters, and then further adjusted by using the adjusted coordinated wind speed as the base wind speed until the moisture and oil content are met. This ensures that the base wind speed adjusted based on temperature and wind speed can be adjusted according to moisture and oil content, thereby ensuring that the requirements of moisture and oil content are met during the transportation process.

Claims

1. A feeding method for particle melting and forming processes in additive manufacturing, wherein the material is processed by a conveying mechanism, the conveying mechanism including a vibratory feeder, and a feeding pipe is provided on one side of the vibratory feeder, characterized in that: The hollow feeding pipe forms a feeding channel, and a heating mechanism, an air supply mechanism, and an auxiliary air supply mechanism are provided on the feeding channel. The specific steps include: S1 Preset particle target temperature T target In addition to the temperature compensation coefficient and the base wind speed of the current air supply mechanism. Particle target moisture content Oil content of particulate matter Detect the current temperature T of the particles current According to the target temperature T of the particles target and the current temperature T of the particles current Determine the current temperature deviation; S2 is based on the current temperature deviation and the base wind speed. The air velocity of the air supply mechanism after temperature compensation is obtained; S3 determines the current moisture content and oil content of the particles, and determines the air velocity of the air supply mechanism after moisture content adjustment based on the difference between the current moisture content and the target moisture content of the particles, the preset moisture content adjustment coefficient, and the air velocity of the air supply mechanism after temperature compensation; and determines the air velocity of the air supply mechanism after oil content adjustment based on the difference between the current oil content and the target oil content of the particles, the preset oil content adjustment coefficient, and the air velocity of the air supply mechanism after temperature compensation. S4 selects the wind speed of the air supply mechanism after adjusting the oil content or the wind speed of the air supply mechanism after adjusting the water content as the base wind speed based on the relationship between the current oil content and the target oil content. S5 determines the coordinated wind speed by using the base wind speed of the auxiliary air supply mechanism and the wind speed of the air supply mechanism, and compares the coordinated wind speed with the base wind speed obtained in step S4. If the wind speeds are inconsistent, the coordinated wind speed is adjusted according to the preset wind speed adjustment parameters, and the base wind speed is determined based on the adjusted coordinated wind speed for air supply until the current water content and current oil content are detected to reach the target water content and target oil content.

2. The feeding method for particle melt molding process in additive manufacturing according to claim 1, characterized in that: In step S1, "based on the target particle temperature T" target and the current temperature T of the particles current "include: In step S2, "based on the current temperature deviation and the basic wind speed..." The temperature-compensated air supply unit wind speed includes: After temperature compensation, the air supply mechanism wind speed K T This is the temperature compensation coefficient.

3. The feeding method for particle melt molding process in additive manufacturing according to claim 1, characterized in that: Step S3, "determining the air velocity of the air supply mechanism after moisture content adjustment based on the difference between the current moisture content and the target moisture content of the particles, the preset moisture content adjustment coefficient, and the air velocity of the air supply mechanism after temperature compensation," includes: ; For the target moisture content of particles, This represents the current moisture content of the particles; The preset moisture content adjustment coefficient; "Determining the airflow speed of the air supply mechanism after oil content adjustment based on the difference between the current oil content and the target oil content of the particles, the preset oil content adjustment coefficient, and the airflow speed of the air supply mechanism after temperature compensation" includes: ; The target oil content for particles. This represents the current oil content of the particles. This is the preset oil content adjustment coefficient.

4. The feeding method for particle melt molding process in additive manufacturing according to claim 3, characterized in that: Step S4, "selecting the wind speed of the air supply mechanism after adjusting the oil content or the wind speed of the air supply mechanism after adjusting the water content as the base wind speed based on the relationship between the current oil content and the target oil content," includes: if the current... ,choose wind speed as The wind speed, if O current ≤O target Then choose wind speed as wind speed, This is the base wind speed of the air supply system.

5. The feeding method for particle melt molding process in additive manufacturing according to claim 4, characterized in that: Step S5 includes: setting the tilt angle A between the auxiliary air supply mechanism and the feeding channel, and determining the horizontal wind speed of the auxiliary air supply mechanism. and vertical wind speed Determine the coordinated horizontal wind speed of the auxiliary air supply mechanism and the main air supply mechanism. = and coordinated vertical wind speed = + And the coordinated wind speed was obtained. V s To assist the oblique wind speed of the air supply mechanism, V g,y = .

6. The feeding method for particle melt molding process in additive manufacturing according to claim 5, characterized in that: Step S5 also includes: comparing the coordinated wind speed with the base wind speed in step S4; if the base wind speed and the coordinated wind speed are not within the preset range, then obtaining the corrected coordinated vertical wind speed based on the base wind speed. , To balance the vertical component coefficients of the air supply mechanism and the auxiliary air supply mechanism, the adjusted coordinated vertical wind speed error value is then obtained. The corrected cooperative horizontal wind speed error value is obtained based on the base wind speed. ,in β This is the coefficient of the horizontal component of the basic wind speed of the air supply mechanism with respect to particles. γ To assist the air supply mechanism in determining the horizontal component coefficient of particles; then, the adjusted cooperative horizontal wind speed error value is obtained. And obtain the comprehensive error value. Finally, the adjusted base wind speed is determined based on the comprehensive error value. ; , This is a preset base wind speed revision value.

7. The feeding method for particle melt molding process in additive manufacturing according to claim 1, characterized in that: The feeding pipe includes an inlet pipe, a discharge pipe, and an outlet pipe. One side of the outlet pipe is connected to the vibratory feeder, and the other side of the outlet pipe is connected to one side of the discharge pipe. The other side of the discharge pipe is connected to the outlet pipe. The heating mechanism includes a microwave heating plate. The feeding pipe is also equipped with a detection mechanism, which includes a humidity sensor and a PID oil vapor sensor.

8. The feeding method for particle melt molding process in additive manufacturing according to claim 7, characterized in that: An air supply mechanism is uniformly arranged along the length of the bottom of the discharge pipe. The air supply mechanism includes an air supply pipe, which is arranged side by side along the width of the bottom of the discharge pipe.

9. The feeding method for particle melt molding process in additive manufacturing according to claim 7, characterized in that: An installation plate is also provided at the upper end of the discharge pipe; auxiliary air supply mechanisms are inclinedly arranged on both sides along the length direction of the installation plate, and the auxiliary air supply mechanisms include spiral nozzles, which are inclinedly connected to the installation plate.

10. The feeding method for particle melt molding process in additive manufacturing according to claim 7, characterized in that: A first scraper is provided on one side of the feed pipe, and a second scraper is provided on the other side of the feed pipe. The first scraper and the second scraper are arranged alternately along the feeding channel direction.

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