Hot bed and nozzle synergistic heating method used in 3D printing process

Abstract

The invention belongs to the technical field of 3D printing, and particularly relates to a hot bed and nozzle synergistic heating method used in a 3D printing process, which comprises the following steps: determining a preset temperature of a substrate, heating to the temperature, and then setting and heating a nozzle to a temperature higher than the temperature of the substrate so as to ensure material fluidity. After the nozzle reaches the target temperature, the substrate temperature is monitored and kept stable, and the heating rate is adjusted according to the nozzle temperature feedback to ensure that the nozzle temperature is constant. Before construction, the heating intensity of the substrate is dynamically adjusted according to the difference value between the current temperature of the substrate and the preset temperature. In addition, in the construction process, nozzle heating parameters are corrected in real time, and temperature consistency is ensured. According to the method, through accurate control and dynamic adjustment of the temperatures of the base plate and the spray head, the forming quality and the printing efficiency of a 3D printing piece are effectively improved, the printing failure rate caused by improper temperature control is reduced, and therefore the printing effect is optimized.

Description

Technical Field

[0001] The present invention belongs to the technical field of 3D printing, and in particular relates to a method for cooperatively heating a hot bed and a nozzle in a 3D printing process. Background Art

[0002] In 3D printing technology, the heating control of the hot bed (substrate) and the nozzle (printing nozzle) is crucial to the quality of the printed parts. In the existing 3D printing process, the heating method of the hot bed and the nozzle is usually independently controlled, that is, the hot bed is first heated to a certain set temperature, and then the nozzle is heated separately to reach a temperature suitable for melting the printing material. Although this method can achieve basic heating functions, in actual operation, due to the large temperature difference between the hot bed and the nozzle, it is easy to cause the printing material to cool too quickly or too slowly when it contacts the hot bed, affecting the molding quality and interlayer bonding of the printed parts.

[0003] Existing heating control methods fail to coordinate the temperature changes of the hot bed and the nozzle well. Especially during the construction process, temperature fluctuations may cause problems such as warping of the printed parts and poor interlayer bonding, reducing printing efficiency and yield. Summary of the invention

[0004] The purpose of the present invention is to provide a method for coordinated heating of a hot bed and a nozzle in a 3D printing process, which effectively improves the molding quality and printing efficiency of 3D printed parts by precisely controlling the heating process of the hot bed and the nozzle, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention adopts the following technical solution: a method for cooperatively heating a hot bed and a nozzle in a 3D printing process, comprising the following steps: S1: before printing starts, determining a first preset temperature value that the substrate needs to reach, based on the first preset temperature, starting a substrate heating device until the substrate reaches the first preset temperature, after the substrate temperature stabilizes at the first preset temperature, setting a print nozzle target temperature, which is higher than the substrate temperature to ensure fluidity of the printing material, and after the print nozzle target temperature is set, activating the print nozzle to heat to the target temperature; S2: monitor the temperature fluctuation of the substrate, keep the substrate temperature constant at a first preset temperature, adjust the heating rate according to the temperature feedback of the print nozzle during the monitoring of the temperature fluctuation of the substrate to maintain the print nozzle temperature constant, and before starting printing, dynamically adjust the substrate heating intensity according to the difference between the current temperature of the substrate and the first preset temperature, and at the same time, modify the print nozzle heating parameters in real time according to the comparison between the print nozzle temperature change and the target temperature; S3: During the construction process, step S2 is executed repeatedly until the three-dimensional construction is completed.

[0006] Preferably, the energy input required to heat the substrate is calculated according to the preset temperature; Using the calculated energy input, the operating power of the heating element is set so that the heating element can heat the substrate to a preset temperature within a predetermined time; Start the heating element and record the heating time to ensure that the substrate temperature rises to the preset temperature within the set time, and continuously monitor the substrate temperature change; If a deviation between the actual temperature and the preset temperature is detected, the power of the heating element is adjusted to ensure that the substrate temperature reaches and is maintained at the preset temperature.

[0007] Preferably, starting the substrate heating device based on the first preset temperature until the substrate reaches the first preset temperature comprises the following steps: When starting the substrate heating device, record the heating start time and the initial temperature of the substrate; Measuring the substrate temperature every predetermined time until it approaches a preset temperature; Calculate the substrate temperature change rate. If the current temperature is lower than the preset temperature, accelerate the heating; if it is higher than the preset temperature, slow down the heating rate until the temperature reaches and stabilizes at the preset temperature.

[0008] Preferably, after the substrate temperature is stabilized at the first preset temperature, setting the target temperature of the printing nozzle, which is higher than the substrate temperature to ensure the fluidity of the printing material, comprises the following steps: Setting a target temperature of the print nozzle, which is higher than the preset temperature of the substrate to ensure the fluidity of the printed material; Calculate the energy required to heat the print nozzle to the target temperature; Set the operating power of the print nozzle heating element to ensure that the print nozzle temperature rises to the target temperature within the expected time and maintains that temperature during the build process.

[0009] Preferably, after the target temperature of the print nozzle is set, activating the print nozzle to heat to the target temperature comprises the following steps: After activating the printing nozzle heating, record the heating start time and the initial temperature of the printing nozzle at that time; The print nozzle temperature is measured at fixed time intervals until the set target temperature is reached; The temperature change rate of the print nozzle is calculated and the power output of the heating device is adjusted according to the change rate to ensure that the temperature rises smoothly to the target temperature and remains constant after reaching it.

[0010] Preferably, monitoring the temperature fluctuation of the substrate and maintaining the substrate temperature at a constant first preset temperature comprises the following steps: Record the current temperature of the substrate and the start time of monitoring, and then measure the substrate temperature every set time and compare it with the preset temperature; If the current temperature is lower than the preset temperature, the power of the heating device is increased to compensate for the temperature loss; If the current temperature is higher than the preset temperature, the power of the heating device is reduced to prevent overheating.

[0011] Preferably, during the monitoring of substrate temperature fluctuations, adjusting the heating rate according to the print nozzle temperature feedback to maintain the print nozzle temperature constant comprises the following steps: Record the current temperature of the print nozzle and the start time of monitoring, and then measure the print nozzle temperature once every set time and compare it with the target temperature; If the current temperature is lower than the target temperature, the power of the print nozzle heating device is increased to compensate for the temperature loss; If the current temperature is higher than the target temperature, the power to the print nozzle heater is reduced to prevent overheating.

[0012] Preferably, dynamically adjusting the substrate heating intensity according to the difference between the current substrate temperature and the first preset temperature comprises the following steps: Record the current temperature of the substrate, and calculate the difference between the current temperature and the preset temperature based on the recorded information; Adjust the power of the substrate heating device according to the difference; After adjusting the power of the heating device, the temperature change of the substrate is continuously monitored. If deviation is found again, the calculation is repeated until the temperature is maintained at the preset temperature.

[0013] Preferably, the real-time correction of the printing nozzle heating parameters according to the comparison between the printing nozzle temperature change and the target temperature comprises the following steps: Record the current temperature of the printing nozzle, and calculate the difference between the current temperature and the target temperature based on the recorded information; Adjust the power of the printing nozzle heating device according to the difference; After adjusting the power of the heating device, the temperature change of the printing nozzle is continuously monitored. If deviation is found again, the calculation is repeated until the temperature is maintained at the target temperature.

[0014] Preferably, during the construction process, step S2 is executed cyclically until the three-dimensional construction is completed, which includes the following steps: Record the start time of the build, and then check at set intervals whether the substrate temperature is equal to the preset temperature and whether the print nozzle temperature is equal to the target temperature; If it is found that the temperature deviates from the corresponding preset temperature, the power of the substrate heating device and the power of the printing nozzle heating device are adjusted respectively according to the deviation; Continue to monitor the temperature of the substrate and the printing nozzle and repeat the calculation until the 3D build is complete.

[0015] Technical effects and advantages of the present invention: Compared with the prior art, the present invention provides a method for cooperatively heating a hot bed and a nozzle in a 3D printing process, which has the following advantages: The present invention effectively improves the molding quality and printing efficiency of 3D printed parts by accurately controlling the heating process of the hot bed and the nozzle. The method ensures the temperature coordination between the substrate and the printing nozzle by real-time monitoring and dynamic adjustment of the temperature of the substrate and the printing nozzle, thereby improving the fluidity of the printing material and the interlayer bonding performance, and reducing the printing failure rate caused by improper temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a flow chart of the method for cooperatively heating a hot bed and a nozzle in a 3D printing process. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] The present invention provides a method for coordinated heating of a hot bed and a nozzle in a 3D printing process, which effectively improves the molding quality and printing efficiency of 3D printed parts by accurately controlling the heating process of the hot bed and the nozzle. The method ensures that the temperature of the substrate and the printing nozzle is coordinated by real-time monitoring and dynamic adjustment of the temperature of the substrate and the printing nozzle, thereby improving the fluidity of the printing material and the interlayer bonding performance, and reducing the printing failure rate caused by improper temperature control.

[0019] like Figure 1 As shown, the method for coordinated heating of a hot bed and a nozzle in a 3D printing process in this embodiment includes the following steps: (a) before printing begins, determining a first preset temperature value that the substrate needs to reach; further comprising: calculating the energy input E required for the substrate to rise from room temperature to the first preset temperature according to the first preset temperature value, where E=(C×M×(T 预设 −T 初始 )) / n, C represents the specific heat capacity of the substrate material, M represents the mass of the substrate, T 预设 is the first preset temperature value, T 初始 is the initial temperature of the substrate, n is the heat dissipation loss efficiency coefficient, 0 <n<1; Then, using the energy input E, the operating power P of the heating element is set so that P×t=E, where t is the expected heating time; After setting the working power of the heating element, start the heating element and record the heating time t to ensure that the substrate temperature rises to T within t. 预设 , and continuously monitor the substrate temperature changes. If the actual substrate temperature is detected to be different from T 预设 If there is a deviation, the heating element power is adjusted according to the deviation to ensure T 基板 Reach and maintain T 预设 .

[0020] The present invention introduces a calculation method for the energy input amount E required for heating the substrate from room temperature to the first preset temperature, and sets the working power P of the heating element according to the calculation result, so that the heating element can heat the substrate to the first preset temperature T within the expected heating time t. 预设 This not only ensures that the substrate quickly reaches the desired preset temperature, but also maintains the stability of the substrate temperature by monitoring the substrate temperature changes in real time and adjusting the power of the heating element in time when temperature deviations are detected.

[0021] In this way, the present invention achieves precise control of the substrate temperature and avoids printing quality problems caused by temperature fluctuations, such as warping or poor interlayer bonding. This helps to improve the molding quality and printing efficiency of 3D printed parts, reduce the printing failure rate caused by improper temperature control, and thus significantly improve the overall reliability and yield rate of the 3D printing process.

[0022] (b) based on the first preset temperature, starting the substrate heating device until the substrate reaches the first preset temperature; further comprising: When the substrate heating device is started, the heating start time t0 and the initial substrate temperature T are recorded. 初始 ; Based on the recorded information, the substrate temperature T(t) is measured once every predetermined time interval Δt until T(t) approaches the first preset temperature T determined in step (a). 预设 ; During the measurement, calculate the substrate temperature change rate R = (T(t) − T 初始 ) / (t−t0), where t is the current time point. After calculating the temperature change rate R, if T(t) <T 预设 , then adjust the power of the heating device according to R to accelerate the temperature rise. If T(t)>T 预设 , the power of the heating device is reduced to slow down the heating rate until T(t) reaches and stabilizes at T 预设 .

[0023] The present invention records the heating start time t0 and the initial temperature T of the substrate while starting the substrate heating device.初始 , and measures the substrate temperature T(t) once every predetermined time interval Δt, which can monitor the heating process of the substrate in real time. By calculating the substrate temperature change rate R, the power output of the heating device can be dynamically adjusted to ensure that the substrate temperature rises steadily and finally stabilizes at the first preset temperature T 预设 .

[0024] This method of dynamically adjusting the heating power can effectively prevent excessive fluctuations in the substrate temperature and avoid problems such as poor curing or warping of printed materials due to inaccurate temperature control. By adjusting the power of the heating device in real time, the present invention ensures that the substrate temperature can quickly and stably reach the preset value, thereby improving the molding quality and printing efficiency of 3D printed parts and reducing the printing failure rate caused by improper temperature control.

[0025] (c) after the substrate temperature in step (b) stabilizes at the first preset temperature, setting a target temperature of the print nozzle, which is higher than the substrate temperature to ensure fluidity of the printing material; further comprising: Set the print nozzle target temperature T 目标 , which is higher than the first preset temperature T of the substrate 预设 , and then calculate the printing nozzle from room temperature T 初始 Raise to target temperature T 目标 Energy required E 目标 , where E 目标 =(C 打印材料 ×M 打印材料 ×(T 目标 −T 初始 )) / n,C 打印材料 is the specific heat capacity of the printing nozzle material, M 打印材料 The quality of the printing nozzle; In the calculation of E 目标 Then, set the working power P of the print nozzle heating element 目标 , so that P 目标 ×t 目标 =E 目标 , where t 目标 is the estimated heating time; after setting the working power of the heating element, start the printing nozzle heating element and record the heating time t 目标 , ensure that t 目标 The temperature of the inner printing nozzle rises to T 目标 , and maintain that temperature during the build process.

[0026] The present invention sets the target temperature T of the printing nozzle. 目标 , and calculate from room temperature T 初始 Raise to target temperature T 目标 The energy required E 目标, ensuring that the printing nozzle can reach and maintain an appropriate high temperature during the heating process to ensure good fluidity of the printing material. 目标 , and in the expected heating time t 目标 The internally activated heating element can precisely control the heating process of the print nozzle.

[0027] This method can not only ensure that the printing nozzle quickly reaches the required target temperature, but also effectively avoid problems such as material blockage due to insufficient temperature or premature solidification of materials due to excessive temperature by maintaining the temperature during the construction process. Therefore, the present invention can significantly improve the fluidity of materials during 3D printing, improve the molding quality and printing efficiency of printed parts, and reduce printing failures caused by improper temperature control.

[0028] (d) after the setting in step (c) is completed, activating the printing nozzle to heat to the target temperature; further comprising: After activating the print nozzle heating, record the heating start time t 起始 And the initial temperature of the printing nozzle at this time T 初始 ; Based on the recorded information, the print nozzle temperature T is measured every fixed time interval Δt 供给 (t), until T 供给 (t) Reach the target temperature T set in step (c) 目标 ; During the measurement, calculate the print nozzle temperature change rate R 供给 =(T 供给 (t)−T 初始 ) / (t−t 起始 ), where t is the current time point; the temperature change rate R is calculated 供给 After that, according to R 供给 Adjust the power output of the heating device to ensure that T 供给 (t) Steadily rises to T 目标 , and when reaching T 目标 Then keep constant.

[0029] The present invention records the heating start time t after activating the printing nozzle heating. 起始 And the initial temperature of the printing nozzle at this time T 初始 , and measure the print nozzle temperature T at fixed intervals Δt 供给 (t), can monitor the heating process of the printing nozzle in real time. By calculating the temperature change rate R 供给 , according to R 供给 Dynamically adjust the power output of the heating device to ensure that the printing nozzle temperature rises steadily to the target temperature T 目标, and keep it constant after reaching the target temperature.

[0030] This method can effectively prevent excessive fluctuations in the temperature of the printing nozzle and avoid problems such as poor fluidity or premature solidification of the printing material due to inaccurate temperature control. By adjusting the power of the heating device in real time, the present invention ensures that the temperature of the printing nozzle can quickly and stably reach and maintain the target temperature, thereby improving the molding quality and printing efficiency of 3D printed parts and reducing the printing failure rate caused by improper temperature control.

[0031] (e) After step (d) is completed, monitoring the temperature fluctuation of the substrate and maintaining the substrate temperature constant at the first preset temperature set in step (a); further comprising: Record the current temperature T of the substrate 基板 and monitoring start time t 起始 , and then measure the substrate temperature T every set time interval Δt 基板 (t), and the first preset temperature T set in step (a) 预设 Make comparisons; If the measured T 基板 (t) is lower than T 预设 , then calculate the temperature deviation ΔT=T 预设 −T 基板 (t), and increase the power P of the heating device according to ΔT 调整 , to compensate for temperature loss; If the measured T 基板 (t) is higher than T 预设 , then the temperature deviation ΔT=T 基板 (t)−T 预设 , and reduce the power P of the heating device according to ΔT 调整 to prevent overheating.

[0032] The present invention records the current temperature T of the substrate. 基板 and monitoring start time t 起始 , and measure the substrate temperature T once at every set time interval Δt 基板 (t), can monitor the change of substrate temperature in real time. By calculating the substrate temperature and the preset temperature T 预设 The power P of the heating device can be dynamically adjusted according to the deviation ΔT. 调整 , ensuring that the substrate temperature can be stabilized near the preset value.

[0033] This method can effectively prevent the fluctuation of substrate temperature and avoid problems such as poor curing or warping of printed materials caused by unstable temperature. By adjusting the power output of the heating device in real time, the present invention ensures that the substrate temperature can quickly and stably reach and maintain a preset temperature, thereby improving the molding quality and printing efficiency of 3D printed parts and reducing the printing failure rate caused by improper temperature control.

[0034] (f) during step (e), adjusting the heating rate based on the print nozzle temperature feedback to maintain the print nozzle temperature constant; further comprising: Record the current temperature T of the printing nozzle 供给 and monitoring start time t 供给起始 , and then every set time interval Δt 供给 , measure the printing nozzle temperature T 供给 (t), and the target temperature T set in step (c) 目标 Make comparisons; If the measured T 供给 (t) is lower than T 目标 , then calculate the temperature deviation ΔT 供给 =T 目标 −T 供给 (t), and according to ΔT 供给 Increase the power P of the print nozzle heating device 供给调整 , to compensate for temperature loss; If the measured T 供给 (t) is higher than T 目标 , then calculate the temperature deviation ΔT in the same way 供给 =T 供给 (t)−T 目标 , and according to ΔT 供给 Reduce the power P of the print nozzle heating device 供给调整 to prevent overheating.

[0035] The present invention records the current temperature T of the printing nozzle. 供给 and monitoring start time t 供给起始 , and set the time interval Δt in each segment 供给 Measure the print nozzle temperature T once 供给 (t), can monitor the change of the print nozzle temperature in real time. By calculating the print nozzle temperature and the target temperature T 目标 Deviation ΔT 供给 The power P of the print nozzle heating device can be dynamically adjusted according to the deviation 供给调整 , ensuring that the print nozzle temperature can be stabilized near the target temperature.

[0036] This method can effectively prevent the fluctuation of the printing nozzle temperature and avoid the fluidity problem of the printing material or premature curing caused by unstable temperature. By adjusting the power output of the heating device in real time, the present invention ensures that the printing nozzle temperature can quickly and stably reach and maintain the target temperature, thereby improving the molding quality and printing efficiency of 3D printed parts and reducing the printing failure rate caused by improper temperature control.

[0037] (g) before starting printing, based on step (f), dynamically adjusting the substrate heating intensity according to the difference between the current temperature of the substrate and the first preset temperature in step (a); further comprising: Record the current temperature T of the substrate 基板 (t), based on the recorded information, calculate the current temperature T of the substrate 基板 (t) and the first preset temperature T in step (a) 预设 The difference ΔT 基板 =T 预设 −T 基板 (t); In the calculation of ΔT 基板 After that, according to ΔT 基板 The size of the substrate heating device is adjusted to the power P 基板调整 , that is, P 基板调整 =k×ΔT 基板 , where k is the proportionality factor; After adjusting the power of the heating device, continue to monitor the temperature change of the substrate. If T 基板 (t) and T 预设 If there is a deviation again, the calculation is repeated until T 基板 (t) Maintain at T 预设 .

[0038] The present invention records the current temperature T of the substrate. 基板 (t), and calculate the current temperature of the substrate and the preset temperature T 预设 The difference ΔT 基板 After that, according to ΔT 基板 Dynamically adjust the power P of the substrate heating device 基板调整 This approach ensures that the substrate temperature can quickly and stably reach and maintain the preset temperature.

[0039] By adjusting the power output of the heating device in real time, the present invention can effectively prevent the fluctuation of the substrate temperature and avoid problems such as poor curing or warping of the printed material due to unstable temperature. Continuously monitoring the temperature changes of the substrate and repeatedly adjusting the power of the heating device when deviations are found ensures that the substrate temperature is always in the optimal state, thereby improving the molding quality and printing efficiency of 3D printed parts and reducing the printing failure rate caused by improper temperature control.

[0040] (h) while executing step (g), according to the change of the temperature of the printing nozzle and the target temperature in step (c), the heating parameters of the printing nozzle are corrected in real time; further comprising: Record the current temperature T of the printing nozzle 供给 (t), based on the recorded information, calculate the current temperature T of the printing nozzle 供给 (t) and the target temperature T set in step (c) 目标 The difference ΔT 供给 =T 目标 −T 供给 (t); In the calculation of ΔT 供给 After that, according to ΔT 供给 Adjust the power P of the print nozzle heating device 供给调整 , that is, P supply adjustment = k 供给 ×ΔT 供给 , where k 供给 is the proportionality coefficient; After adjusting the power of the heating device, continue to monitor the temperature change of the printing nozzle. If T 供给 (t) and T 目标 If there is a deviation again, the calculation is repeated until T 供给 (t) Maintain at T 目标 .

[0041] The present invention records the current temperature T of the printing nozzle. 供给 (t), and calculate the current temperature of the printing nozzle and the target temperature T 目标 The difference ΔT 供给 After that, according to ΔT 供给 Dynamically adjust the power P of the print nozzle heating device 供给调整 This approach ensures that the print nozzle temperature can quickly and stably reach and maintain the target temperature.

[0042] By adjusting the power output of the heating device in real time, the present invention can effectively prevent the fluctuation of the printing nozzle temperature and avoid the fluidity problem of the printing material or premature curing caused by unstable temperature. Continuously monitoring the change of the printing nozzle temperature and repeatedly adjusting the power of the heating device when deviations are found ensures that the printing nozzle temperature is always in the optimal state, thereby improving the molding quality and printing efficiency of 3D printed parts and reducing the printing failure rate caused by improper temperature control.

[0043] (i) During the construction process, steps (e) to (h) are executed repeatedly until the three-dimensional construction is completed, further comprising: Record the construction start time t 构建起始 , and then every set time interval Δt 构建, check the substrate temperature T 基板 (t) is equal to the first preset temperature T set in step (a) 预设 , and the print nozzle temperature T 供给 Is (t) equal to the target temperature T set in step (c)? 目标 ; If T is found 基板 (t) or T 供给 (t) deviates from the corresponding preset temperature, then according to the deviation ΔT in steps (e) to (h), 基板 and ΔT 供给 , respectively adjust the substrate heating device power P 基板调整 and the print nozzle heating device power P 供给调整 , that is, P 基板调整 =k×ΔT 基板 , P 供给调整 =k 供给 ×ΔT 供给 ; After adjusting the power of the heating device, continue to monitor the temperature of the substrate and the printing nozzle, and repeat the calculation until the three-dimensional construction is completed.

[0044] The present invention records the construction start time t 构建起始 , and set the time interval Δt in each segment 构建 Check the substrate temperature T 基板 (t) and the printing nozzle temperature T 供给 (t), ensuring that they reach the first preset temperature T set in step (a) respectively 预设 and the target temperature T set in step (c) 目标 .

[0045] Once you find T 基板 (t) or T 供给 (t) deviates from the preset temperature, then according to the deviation ΔT 基板 and ΔT 供给 , respectively adjust the substrate heating device power P 基板调整 and the print nozzle heating device power P 供给调整 .

[0046] This method can ensure that the temperature of the substrate and the printing nozzle is always kept at the optimal state during the construction process, effectively preventing printing quality problems caused by temperature fluctuations, such as poor material curing or poor interlayer bonding. By real-time monitoring and dynamic adjustment of the power output of the heating device, the present invention significantly improves the molding quality and printing efficiency of 3D printed parts, and reduces the printing failure rate caused by improper temperature control.

[0047] In summary, the present invention determines a preset temperature of the substrate and heats it to that temperature, and then sets and heats the nozzle to a temperature higher than the substrate to ensure material fluidity. After the nozzle reaches the target temperature, the substrate temperature is monitored and kept stable, and the heating power is adjusted according to the nozzle temperature feedback to ensure that the nozzle temperature is constant. Before construction, the substrate heating intensity is dynamically adjusted according to the difference between the current temperature of the substrate and the preset temperature. In addition, during the construction process, the nozzle heating parameters are corrected in real time to ensure temperature consistency. This method effectively improves the molding quality and printing efficiency of 3D printed parts by accurately controlling and dynamically adjusting the temperature of the substrate and the nozzle, reduces the printing failure rate caused by improper temperature control, and thus optimizes the printing effect.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for cooperatively heating a hot bed and a nozzle in a 3D printing process, characterized in that: The following steps are involved: S1: before printing starts, determining a first preset temperature value that the substrate needs to reach, based on the first preset temperature, starting a substrate heating device until the substrate reaches the first preset temperature, after the substrate temperature stabilizes at the first preset temperature, setting a print nozzle target temperature, which is higher than the substrate temperature to ensure fluidity of the printing material, and after the print nozzle target temperature is set, activating the print nozzle to heat to the target temperature; S2: monitor the temperature fluctuation of the substrate, keep the substrate temperature constant at a first preset temperature, adjust the heating rate according to the temperature feedback of the print nozzle during the monitoring of the temperature fluctuation of the substrate to maintain the print nozzle temperature constant, and before starting printing, dynamically adjust the substrate heating intensity according to the difference between the current temperature of the substrate and the first preset temperature, and at the same time, modify the print nozzle heating parameters in real time according to the comparison between the print nozzle temperature change and the target temperature; S3: During the construction process, step S2 is executed repeatedly until the three-dimensional construction is completed.

2. The method for cooperatively heating a hot bed and a nozzle in a 3D printing process according to claim 1, characterized in that: Determining a first preset temperature value that the substrate needs to reach before printing begins includes the following steps: Calculate the energy input required to heat the substrate according to the preset temperature; Using the calculated energy input, the operating power of the heating element is set so that the heating element can heat the substrate to a preset temperature within a predetermined time; Start the heating element and record the heating time to ensure that the substrate temperature rises to the preset temperature within the set time, and continuously monitor the substrate temperature change; If a deviation between the actual temperature and the preset temperature is detected, the power of the heating element is adjusted to ensure that the substrate temperature reaches and is maintained at the preset temperature.

3. The method for cooperatively heating a hot bed and a nozzle in a 3D printing process according to claim 2, characterized in that: Based on the first preset temperature, starting the substrate heating device until the substrate reaches the first preset temperature includes the following steps: When starting the substrate heating device, record the heating start time and the initial temperature of the substrate; Measuring the substrate temperature every predetermined time until it approaches a preset temperature; Calculate the substrate temperature change rate. If the current temperature is lower than the preset temperature, accelerate the heating; if it is higher than the preset temperature, slow down the heating rate until the temperature reaches and stabilizes at the preset temperature.

4. The method for cooperatively heating a hot bed and a nozzle in a 3D printing process according to claim 3, characterized in that: When the substrate temperature is stabilized at the first preset temperature, setting the target temperature of the printing nozzle, which is higher than the substrate temperature to ensure the fluidity of the printing material, includes the following steps: Setting a target temperature of the print nozzle, which is higher than the preset temperature of the substrate to ensure the fluidity of the printed material; Calculate the energy required to heat the print nozzle to the target temperature; Set the operating power of the print nozzle heating element to ensure that the print nozzle temperature rises to the target temperature within the expected time and maintains that temperature during the build process.

5. The method for cooperatively heating a hot bed and a nozzle in a 3D printing process according to claim 4, characterized in that: After the target temperature of the print nozzle is set, activating the print nozzle to heat to the target temperature includes the following steps: After activating the printing nozzle heating, record the heating start time and the initial temperature of the printing nozzle at that time; The print nozzle temperature is measured at fixed time intervals until the set target temperature is reached; The temperature change rate of the print nozzle is calculated and the power output of the heating device is adjusted according to the change rate to ensure that the temperature rises smoothly to the target temperature and remains constant after reaching it.

6. The method for cooperatively heating a hot bed and a nozzle in a 3D printing process according to claim 5, characterized in that: The method of monitoring the temperature fluctuation of the substrate and maintaining the substrate temperature at a constant first preset temperature comprises the following steps: Record the current temperature of the substrate and the start time of monitoring, and then measure the substrate temperature every set time and compare it with the preset temperature; If the current temperature is lower than the preset temperature, the power of the heating device is increased to compensate for the temperature loss; If the current temperature is higher than the preset temperature, the power of the heating device is reduced to prevent overheating.

7. The method for cooperatively heating a hot bed and a nozzle in a 3D printing process according to claim 6, characterized in that: The method of adjusting the heating rate according to the temperature feedback of the printing nozzle during the monitoring of the substrate temperature fluctuation to maintain the printing nozzle temperature constant comprises the following steps: Record the current temperature of the print nozzle and the start time of monitoring, and then measure the print nozzle temperature once every set time and compare it with the target temperature; If the current temperature is lower than the target temperature, the power of the print nozzle heating device is increased to compensate for the temperature loss; If the current temperature is higher than the target temperature, the power to the print nozzle heater is reduced to prevent overheating.

8. The method for cooperatively heating a hot bed and a nozzle in a 3D printing process according to claim 7, characterized in that: The method of dynamically adjusting the substrate heating intensity according to the difference between the current substrate temperature and the first preset temperature includes the following steps: Record the current temperature of the substrate, and calculate the difference between the current temperature and the preset temperature based on the recorded information; Adjust the power of the substrate heating device according to the difference; After adjusting the power of the heating device, the temperature change of the substrate is continuously monitored. If deviation is found again, the calculation is repeated until the temperature is maintained at the preset temperature.

9. The method for cooperatively heating a hot bed and a nozzle in a 3D printing process according to claim 8, characterized in that: The method of correcting the heating parameters of the printing nozzle in real time according to the comparison between the change of the printing nozzle temperature and the target temperature comprises the following steps: Record the current temperature of the printing nozzle, and calculate the difference between the current temperature and the target temperature based on the recorded information; Adjust the power of the printing nozzle heating device according to the difference; After adjusting the power of the heating device, the temperature change of the printing nozzle is continuously monitored. If deviation is found again, the calculation is repeated until the temperature is maintained at the target temperature.

10. The method for cooperatively heating a hot bed and a nozzle in a 3D printing process according to claim 9, characterized in that: The construction process, step S2 is executed repeatedly until the three-dimensional construction is completed, including the following steps: Record the start time of the build, and then check at set intervals whether the substrate temperature is equal to the preset temperature and whether the print nozzle temperature is equal to the target temperature; If it is found that the temperature deviates from the corresponding preset temperature, the power of the substrate heating device and the power of the printing nozzle heating device are adjusted respectively according to the deviation; Continue to monitor the temperature of the substrate and the printing nozzle and repeat the calculation until the 3D build is complete.

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