A 3D printing device and real-time monitoring method based on large-size polymer materials

Abstract

The present invention discloses a 3D printing device based on large-size polymer materials and a real-time monitoring method. A bearing platform is provided at the inner bottom where the frame body is located for bearing printing objects, and a temperature control system is provided in the upper bearing space where the bearing platform is located; the camera module consists of multiple groups. Two groups of camera modules are synchronously arranged in the spraying direction and the side position of the spraying module, and multiple groups of camera modules are arranged on the end surface formed by the X-axis movement component and the Y-axis movement component. A steering seat is provided on the rear seat connected to each group of camera modules, and the focus point of each group of camera modules is made to coincide with the spraying point of the spraying module by adjusting the steering seat. A five-camera system is adopted, and intelligent data processing is carried out by using the data acquisition and central control system. According to the difference between the printing data and the actually measured data, the printing file data and the printing path are adjusted for reverse compensation to improve the printing accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of 3D printing equipment, and particularly relates to a 3D printing device based on large-size polymer materials and a real-time monitoring method. Background Art

[0002] During the 3D printing process of polymer material pellets, due to the large printing size, the expansion coefficient of the material under high and low temperature changes causes large deformations. It is necessary to adjust the set size of the printing file, monitor the printing temperature and the actual size of the print, and perform reverse compensation after comparison to achieve the control of printing accuracy.

[0003] In Chinese Patent CN202110728018.3, a 3D printing device with precise leveling is disclosed, including: a sliding seat, a detection part and a horizontal part adapted to slide on the top of the sliding seat, a support frame arranged on the side wall of the sliding seat, and an adjustment part adapted to slide on the outer wall of the support frame. By rotating the adjustment part, the lateral length of the adjustment rod in the adjustment part is controlled, and then the degree of fit between the adjustment part and the raw material is adjusted to adjust the feeding speed of the raw material to ensure the horizontal state of the printing plate.

[0004] However, due to the different jetting raw materials used in the printing environment, and this jetting raw material has its own expansion coefficient in different temperature environments, when jetting is completed through the nozzle position, certain deviations will occur. Continuing to jet and print will cause the original deviation coefficient to further increase, seriously affecting the accuracy. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a 3D printing device based on large-size polymer materials and a real-time monitoring method, which solves the above technical problems existing in the prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A 3D printing device based on large-size polymer materials includes a frame body, a motion module, a material spraying module, and a camera module;

[0008] The frame body is an open-frame structure, and a bearing platform is arranged at the inner bottom where the frame body is located for bearing printing objects, and a temperature control system is arranged in the upper bearing space where the bearing platform is located;

[0009] The motion module includes an X-axis motion component, a Y-axis motion component, and a Z-axis motion component. The material spraying module is slidably arranged on the X-axis motion component along the X-axis direction, so that the spraying direction of the material spraying module faces the bearing platform. The X-axis motion component is slidably arranged on the Y-axis motion component along the Y-axis direction, and at the same time, the bearing platform is slidably arranged on the Z-axis motion component along the Z-axis direction;

[0010] The camera module consists of multiple groups. Two groups of camera modules are synchronously set in the spraying direction and the side position of the spraying module. At the same time, multiple groups of camera modules are set on the end face formed by the X-axis moving component and the Y-axis moving component. A steering seat is provided on the rear seat connected to each group of camera modules. By adjusting the steering seat, the focus point of each group of camera modules coincides with the spraying point of the spraying module.

[0011] Furthermore, the X-axis moving component, the Y-axis moving component, and the Z-axis moving component are all driven by independent driving methods.

[0012] Furthermore, the X-axis moving component, the Y-axis moving component, and the Z-axis moving component all achieve axial movement in the extending direction through the ball screw drive method.

[0013] Furthermore, 5 groups of camera modules are provided, and the data collected by each group of camera modules are independently uploaded to the control center of the operating system.

[0014] The real-time monitoring method of the large-size polymer material 3D printing device described above includes the following steps:

[0015] S1. First, place the object to be printed on the loading platform, adopt the three-dimensional space size data measured by the camera module at two different temperatures, calculate the difference M between the three-dimensional space size data at the two different temperatures, and adjust the relative position of the moving module relative to the loading platform according to the value of M, and transmit the measurement data to the control center;

[0016] S2. According to the measured data, select the printing path, and adjust the environmental temperature of the upper loading space where the loading platform is located to the state temperature during measurement;

[0017] S3. Divide the object to be printed with the measured data into several equal layers from bottom to top. Subsequently, start from the bottom layer and control the spraying module to spray the material through the selected printing path. After the spraying and printing are formed, record the printing data through the camera module and compare it with the originally photographed data and record the differences;

[0018] S4. Lower the loading platform by one equal layer, and adopt the method of reverse compensation. When performing the next process printing, continue to complete the spraying and printing from the model that was completed in the previous printing and forming. Subsequently, record the printing data through the camera module again and compare it with the originally photographed data and record the differences until all the spraying and printing processes are completed.

[0019] Furthermore, in S2, the material sprayed is deposited on the upper surface where the loading platform is located through the X-axis moving component and the Y-axis moving component on the spraying module.

[0020] Further, the focusing points of the multiple camera modules in S3 and S4 are all matched with the material points ejected by the spraying module.

[0021] Advantages of the present invention:

[0022] 1. The present device adopts a five-camera system, uses a data acquisition central control system to perform intelligent data processing, adjusts the printed file data and printing path according to the difference between the printing data and the actually measured data, and performs reverse compensation to improve the printing accuracy.

[0023] 2. The present device calculates the difference M in the three-dimensional space size data at two different temperatures, adjusts the relative position of the motion module relative to the bearing platform according to the value of M, and transmits the measurement data to the control center, reducing the large change in the expansion coefficient of the sprayed material caused by the temperature difference and affecting the forming accuracy.

[0024] 3. The real-time monitoring method adopted by the present invention uses numerical control operation. After taking hierarchical positioning photos of the object to be printed, printing is carried out layer by layer and step by step from the bottom. Each time printing is performed, the direction angle of the next process printing is corrected by a correction method, and the printing path is readjusted, which is suitable for the printing and forming of large-size polymer materials and further improves the printing accuracy. Description of the drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0026] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention;

[0027] Figure 2 is the side structural schematic diagram of the embodiment of the present invention;

[0028] Figure 3 is the top view structural schematic diagram of the embodiment of the present invention;

[0029] Figure 4 is the flow schematic diagram of the real-time monitoring method of the embodiment of the present invention;

[0030] Figure 5 is the printing state display schematic diagram of the embodiment of the present invention. Detailed implementation manners

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figure 1 、 Figure 2 shown, an embodiment of the present invention provides a 3D printing device based on large-sized polymer materials, including a frame body 1, a motion module 2, a material spraying module 3, and a camera module 4.

[0033] The frame body 1 is an open-frame structure. A bearing platform 11 is arranged at the close-to-body surface and at the inner bottom where the frame body 1 is located, for bearing the object to be printed. And a temperature control system is arranged in the upper bearing space where the bearing platform 11 is located. The temperature control system can control the ambient temperature above the bearing platform 11.

[0034] The motion module 2 includes an X-axis motion component 21, a Y-axis motion component 22, and a Z-axis motion component 23. At this time, each motion component realizes axial motion in the extending direction through a screw drive mode. At the same time, the X-axis motion component 21, the Y-axis motion component 22, and the Z-axis motion component 23 are all driven through independent drive modes. The material spraying module 3 is slidably arranged on the X-axis motion component 21 along the X-axis direction, so that the spraying direction of the material spraying module 3 faces the bearing platform 11. The X-axis motion component 21 is slidably arranged on the Y-axis motion component 22 along the Y-axis direction. At the same time, the bearing platform 11 is slidably arranged on the Z-axis motion component 23 along the Z-axis direction;

[0035] As Figure 3 shown, the camera module 4 is composed of multiple groups. There are 5 groups of camera modules 4. And the data collected by each group of camera modules 4 are independently uploaded to the control center of the operating system. Two groups of camera modules 4 are synchronously arranged in the spraying direction and the side position of the material spraying module 3 respectively. At the same time, multiple groups of camera modules 4 are arranged on the end surface formed by the X-axis motion component 21 and the Y-axis motion component 22. And a steering seat 41 is arranged on the rear seat connected to each group of camera modules 4. By adjusting the steering seat 41, the focus point of each group of camera modules 4 is made to coincide with the spraying point of the material spraying module 3.

[0036] As Figure 4 、 Figure 5 shown, a real-time monitoring method for a 3D printing device based on large-sized polymer materials includes the following steps:

[0037] S1. First, place the object to be printed on the bearing platform 11. Use the three-dimensional space dimension data measured by the camera module 4 at two different temperatures and the change value of the two temperatures to reduce the excessive deviation of the dimension data caused by the temperature difference change. Calculate the difference M1 between the three-dimensional space dimension data at the two different temperatures. And adjust the relative position of the motion module 2 relative to the bearing platform 11 according to the value of M1. Transmit the measured data to the control center.

[0038] S2. The control center selects a printing path according to the measured data (the printing path is implanted through a program pre-implanted into the system and there are multiple options, and the corresponding printing path is matched according to the measured data), and adjusts the ambient temperature of the upper bearing space where the bearing platform 11 is located to the state temperature during measurement (so that the expansion coefficient of the ejected material is in the same state as the expansion coefficient of the material when the average value of the two different temperatures measured before). When spraying the material, the material ejected is deposited on the upper surface where the bearing platform 11 is located through the X-axis movement component 21 and the Y-axis movement component 22 located on the spraying module 3.

[0039] S3. The object to be printed with the measured data is divided into several equal layers from bottom to top. Subsequently, starting from the bottom layer, the spraying module 3 is controlled to spray the material through the selected printing path, that is, a printing layer is printed on the same horizontal plane. After the spraying and printing are completed, the camera module 4 records the printed data and compares it with the previously captured data and records the differences.

[0040] S4. The bearing platform 11 is lowered by one equal layer, and the reverse compensation method is adopted. When performing the next process printing, continue to complete the spraying and printing from the model that was previously completed with printing. Subsequently, the camera module 4 records the printed data and compares it with the previously captured data and records the differences again until all the spraying and printing processes are completed.

[0041] Further, in S2, the material ejected is deposited on the upper surface where the bearing platform 11 is located through the X-axis movement component 21 and the Y-axis movement component 22 located on the spraying module 3.

[0042] Further, in S3 and S4, the focusing points of multiple groups of camera modules 4 are all matched with the material points ejected by the spraying module 3.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A 3D printing device based on large-size polymer materials, characterized in that It includes a frame body (1), a motion module (2), a spraying module (3), and a camera module (4); The frame body (1) is an open-frame structure, and a bearing platform (11) is arranged at the inner bottom where the frame body (1) is located for bearing printed objects, and a temperature control system is arranged in the upper bearing space where the bearing platform (11) is located; The motion module (2) includes an X-axis motion component (21), a Y-axis motion component (22), and a Z-axis motion component (23). The spraying module (3) is slidably arranged on the X-axis motion component (21) along the X-axis direction, so that the spraying direction of the spraying module (3) faces the bearing platform (11). The X-axis motion component (21) is slidably arranged on the Y-axis motion component (22) along the Y-axis direction. At the same time, the bearing platform (11) is slidably arranged on the Z-axis motion component (23) along the Z-axis direction; The camera module (4) consists of multiple groups. Two groups of camera modules (4) are synchronously arranged in the spraying direction and the side position of the spraying module (3). At the same time, multiple groups of camera modules (4) are arranged on the end face formed by the X-axis motion component (21) and the Y-axis motion component (22). And a steering seat (41) is arranged on the rear seat connected to each group of camera modules (4). By adjusting the steering seat (41), the focus point of each group of camera modules (4) is made to coincide with the spraying point of the spraying module (3); The X-axis motion component (21), the Y-axis motion component (22), and the Z-axis motion component (23) are all driven by independent driving methods; The X-axis motion component (21), the Y-axis motion component (22), and the Z-axis motion component (23) all achieve axial motion in the extending direction through a screw drive method; The camera module (4) is provided with 5 groups, and the data collected by each group of camera modules (4) is independently uploaded to the control center of the operating system.

2. A real-time monitoring method, based on the large-size polymer material 3D printing device as described in claim 1, characterized in that, It includes the following steps: S1. First, place the object to be printed on the bearing platform (11). Adopt the three-dimensional space dimension data measured by the camera module (4) at two different temperatures, calculate the difference M1 between the three-dimensional space dimension data at the two different temperatures, and adjust the relative position of the motion module (2) relative to the bearing platform (11) according to the value of M1, and transmit the measurement data to the control center; S2. Select a printing path according to the measured data, and adjust the ambient temperature in the upper bearing space where the bearing platform (11) is located to the state temperature during measurement; S3. Divide the object to be printed with the measured data into several equal layers from bottom to top. Then, starting from the bottom layer, control the spraying module (3) to spray materials through the selected printing path. After spraying and forming, compare the printed data recorded by the camera module (4) with the originally captured data and record the differences; S4. Lower the carrying platform (11) by one equal layer, and adopt the method of reverse compensation. When performing the next process printing, continue to perform jet printing from the model that was previously printed and formed until all jet printing processes are completed, while recording the printed data through the camera module (4) again, comparing it with the previously captured data, and recording the differences.

3. The real-time monitoring method according to claim 2, wherein In the above S2, the X-axis motion component (21) and Y-axis motion component (22) located on the material spraying module (3) are used to deposit the sprayed material on the upper surface where the carrying platform (11) is located.

4. The real-time monitoring method according to claim 2, wherein In the above S3 and S4, the focusing points of multiple camera modules (4) are all matched with the material points ejected by the material spraying module (3).

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