First layer height automatic detection framework based on 3D printer and 3D printer

Abstract

The utility model discloses a first-layer height automatic detection framework based on a 3D printer and the 3D printer, and the first-layer height automatic detection framework comprises a printing bottom plate structure, a first-layer height detection structure and a second-layer height detection structure, the printing assembly structure comprises a printing nozzle and a first eddy current sensor which are fixedly connected, the first eddy current sensor and the printing bottom plate structure are vertically and correspondingly arranged in a separable mode, and the first eddy current sensor monitors the numerical value of the distance between the first eddy current sensor and the printing bottom plate structure and the numerical value of the distance between the printing nozzle and the printing bottom plate structure in real time. The technical problems that in the prior art, the function limitation of a distance adjusting and calibrating framework between a nozzle and a printing bottom plate of a 3D printer is large, and the requirements for high precision, high efficiency and low cost are difficult to meet are solved.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and more specifically, to an automatic first-layer height detection architecture based on a 3D printer and a 3D printer. Background Technology

[0002] In the field of 3D printing, precisely controlling the distance between the printer nozzle and the build platform is crucial for improving print quality. Currently, nozzle replacements or thermal expansion of the build platform often cause deviations in this distance, and even minor deviations can lead to defective products or printing failures. Traditionally, calibration processes can ensure that the distance between the extruder and the build platform remains within the optimal range, thereby improving printing accuracy and the detail of the printed object.

[0003] Currently, commonly used calibration procedures include: First, manual calibration, where operators manually place a feeler gauge to measure the height of the first-layer nozzle before printing. However, this method has obvious drawbacks: it is cumbersome and time-consuming, reducing printing efficiency. Furthermore, manual judgment is inaccurate, making it difficult to adjust the first-layer height accurately in real time, resulting in poor calibration effects. In addition, it requires a high degree of flatness of the base plate, necessitating pre-adjustment, further increasing operational complexity. Second, for example, US Patent No. 10556381B2 discloses a distance monitoring and adjustment device between the nozzle and the printing base plate. This device can monitor and adjust the contact force in real time to maintain a reasonable distance between the nozzle and the base plate. As the distance changes, the contact force changes accordingly, and the system adjusts accordingly to improve printing accuracy and quality. However, the solution shown in this patent still has the following drawbacks: it indirectly measures the distance using a force sensor, and factors such as vibration during printing and changes in nozzle acceleration directly interfere with the contact force measurement, making the distance data inaccurate. Moreover, its structure is complex, its size is large, it is difficult to install in the printer's internal space, and its manufacturing cost is high, which is not conducive to its widespread adoption. Utility Model Content

[0004] To address this issue, the present invention provides an automatic first-layer height detection architecture and a 3D printer based on a 3D printer, thereby solving the technical problem that the existing technology for adjusting and calibrating the distance between the nozzle and the printing plate of a 3D printer has significant functional limitations and cannot meet the requirements of high precision, high efficiency, and low cost.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An automatic first-layer height detection architecture based on a 3D printer includes:

[0007] Printing base plate structure;

[0008] The printing assembly structure includes a printing nozzle and a first eddy current sensor that are fixedly connected together. The first eddy current sensor and the printing base plate structure are detachably and vertically corresponding. The first eddy current sensor monitors in real time the distance values ​​between itself and the printing nozzle and the printing base plate structure, respectively.

[0009] Based on the above technical solution, the present invention is further described as follows:

[0010] As a further aspect of this utility model, it also includes:

[0011] The tool setting device structure has a detachable vertically aligned contact switch and the printing nozzle. When the contact switch of the tool setting device structure detects that it is pressed by the printing nozzle, the distance between the printing nozzle and the printing base plate structure is calibrated to a reference distance value for calculation in the current state.

[0012] As a further embodiment of this utility model,

[0013] The printing base plate structure and the tool setting device structure are fixedly arranged relative to each other, and the tool setting device structure is located on one side of the printing base plate structure.

[0014] As a further embodiment of this utility model,

[0015] The tool setting device structure includes an assembly body and a tool setting contact switch;

[0016] The knife-type pressure switch is slidably mounted on the assembly body, and a spring is also mounted between the base of the knife-type pressure switch and the assembly body.

[0017] As a further embodiment of this utility model,

[0018] The printing assembly structure also includes a pressure film sensor;

[0019] The monitoring end of the pressure film sensor is connected to the printing nozzle via a transmission connection.

[0020] As a further embodiment of this utility model,

[0021] The pressure film sensor is fixedly connected to the printing nozzle and the first eddy current sensor respectively, and the pressure film sensor is located above the printing nozzle.

[0022] As a further embodiment of this utility model,

[0023] The printing nozzle is located above the printing base plate structure.

[0024] As a further aspect of this utility model, it also includes:

[0025] The nozzle monitoring structure is detachably and vertically aligned with the printing base plate structure.

[0026] As a further embodiment of this utility model,

[0027] The nozzle monitoring structure includes a second eddy current sensor and a sensing plate;

[0028] The sensing plate is fixedly connected to the printing nozzle, the second eddy current sensor is positioned, and the monitoring end of the second eddy current sensor is correspondingly positioned with respect to the sensing plate.

[0029] A 3D printer, including the aforementioned automatic first-layer height detection architecture based on the 3D printer.

[0030] This utility model has the following beneficial effects:

[0031] This architecture can effectively use the tool setter structure as the calibration basis for the initial distance between the printing base structure and the printing component structure. At the same time, it can effectively use the printing component structure to realize the real-time distance between itself and the printing base structure through self-sensing. Thus, the nozzle height is automatically calibrated by electromagnetic sensors, avoiding the accuracy error caused by manual calibration. Furthermore, the distance data of the nozzle relative to the printing base structure can be directly measured non-contactly by electromagnetic sensors, thereby avoiding motion errors caused by force sensing and improving the practicality of the function. Attached Figure Description

[0032] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The structures, proportions, sizes, etc., drawn in this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0033] Figure 1 This is one of the overall application state structure diagrams of the automatic first-layer height detection architecture based on a 3D printer provided in Embodiment 1 of this utility model.

[0034] Figure 2 This is a schematic diagram of the assembly structure of the printing base plate structure and the tool setting device structure in the automatic detection architecture for the first layer height of the 3D printer provided in Embodiment 1 of this utility model.

[0035] Figure 3This is a schematic diagram of the assembly structure of the printing component in the automatic first-layer height detection architecture based on a 3D printer provided in Embodiment 1 of this utility model.

[0036] Figure 4 This is a schematic diagram of the assembly structure of the tool setting device in the automatic detection architecture for the first layer height of a 3D printer provided in Embodiment 1 of this utility model.

[0037] Figure 5 This is the second schematic diagram of the overall application state structure of the automatic first-layer height detection architecture based on a 3D printer provided in Embodiment 1 of this utility model.

[0038] Figure 6 This is a schematic diagram of the assembly structure of the printing component in the automatic first-layer height detection architecture based on a 3D printer provided in Embodiment 2 of this utility model.

[0039] Figure 7 This is one of the overall application state structure diagrams of the automatic first-layer height detection architecture based on a 3D printer provided in Embodiment 2 of this utility model.

[0040] Figure 8 This is the second schematic diagram of the overall application state structure of the automatic first-layer height detection architecture based on a 3D printer provided in Embodiment 2 of this utility model.

[0041] Figure 9 This is a schematic diagram of the assembly structure of the printing component structure and the nozzle monitoring structure in the automatic detection architecture for the first layer height of a 3D printer provided in Embodiment 3 of this utility model.

[0042] Figure 10 This is one of the overall application state structure diagrams of the automatic first-layer height detection architecture based on a 3D printer provided in Embodiment 3 of this utility model.

[0043] Figure 11 This is the second schematic diagram of the overall application state structure of the automatic first-layer height detection architecture based on a 3D printer provided in Embodiment 3 of this utility model.

[0044] The attached diagram lists the components represented by each number as follows:

[0045] Print base plate structure 1;

[0046] Tool setting device structure 2: Assembly body 21, tool setting contact switch 22, spring component 23;

[0047] Printing component structure 3: printing nozzle 31, first eddy current sensor 32, pressure film sensor 33;

[0048] Nozzle monitoring structure 4: Second eddy current sensor 41, sensing plate 42. Detailed Implementation

[0049] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0050] The terms "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0051] Example 1

[0052] like Figures 1 to 5 As shown, this utility model embodiment provides an automatic first-layer height detection architecture for a 3D printer and a 3D printer including the automatic first-layer height detection architecture. The automatic first-layer height detection architecture includes a printing base plate structure 1, a tool setting device structure 2, and a printing assembly structure 3. The tool setting device structure 2 effectively serves as the calibration basis for the initial distance between the printing base plate structure 1 and the printing assembly structure 3. Simultaneously, the printing assembly structure 3 can effectively achieve self-sensing monitoring of its real-time distance from the printing base plate structure 1. This allows for automatic calibration of the nozzle height using an electromagnetic sensor, avoiding accuracy errors caused by manual calibration. Furthermore, the electromagnetic sensor can directly measure the distance data of the nozzle relative to the printing base plate structure 1 non-contactly, thus avoiding motion errors caused by force sensing. Specific settings are as follows:

[0053] Please refer to Figures 1 to 5 The printing base plate structure 1 and the tool setting device structure 2 are fixedly arranged relative to each other, and the tool setting device structure 2 is located on one side of the printing base plate structure 1.

[0054] The printing assembly structure 3 includes a printing nozzle 31 and a first eddy current sensor 32 fixedly connected together. The printing nozzle 31 is detachably and vertically aligned with the pressure switch of the tool setting device structure 2, and the first eddy current sensor 32 is detachably and vertically aligned with the printing base plate structure 1. This allows a defined distance h1 to be formed between the pressure switch of the tool setting device structure 2 and the printing base plate structure 1. The printing nozzle 31 can be vertically lowered or the printing base plate structure 1 and the tool setting device structure 2 can be vertically raised to press the pressure switch of the tool setting device structure 2. When the tool setting device structure 2 detects pressure triggering, the distance h2 between the printing nozzle 31 and the printing base plate structure 1 is precisely calibrated to equal the distance h1 in the current state. The distance h2 between the first eddy current sensor 32 and the printing base plate structure 1 in the current state is then used as a reference distance h. 01 Simultaneously, by moving the first eddy current sensor 32 upwards at predetermined intervals along the height direction, the change in the sensor's magnetic field relative to the printing base plate structure 1 at different heights is obtained. The change in the sensor's magnetic field is then correlated with the corresponding height change to obtain a fitting curve. Furthermore, a lateral driving force can be applied using the first eddy current sensor 32 to detect data at different positions on the printing base plate structure 1, thereby obtaining the height values ​​at different positions on the printing base plate structure 1, and combining this with the reference spacing value h. 01 By obtaining the lifting value of the printing nozzle 31 and the distance value h2 between it and the printing base plate structure 1, the height compensation value of the printing nozzle 31 at different positions corresponding to the printing base plate structure 1 can be accurately obtained, which significantly improves the overall numerical accuracy between the printing nozzle 31 and the printing base plate structure 1.

[0055] As an optional solution in this embodiment, please continue to refer to Figure 4 The tool setting device structure 2 includes an assembly body 21, a tool setting contact switch 22, and a spring member 23. The tool setting contact switch 22 is slidably mounted on the assembly body 21, and a spring member 23 is also mounted between the base of the tool setting contact switch 22 and the assembly body 21. This spring member 23 is used to further form a self-returning elastic contact pressure monitoring function corresponding to the printing nozzle 31 by having the contact end of the tool setting contact switch 22 protrude out of the assembly body 21.

[0056] Example 2

[0057] In Example 2, the same symbols are used for the same structures as in Example 1, and the same descriptions are omitted. The difference between Example 2 and Example 1 is that, please refer to... Figures 6 to 8The printing assembly structure 3 further includes a pressure film sensor 33 that is fixedly connected to the printing nozzle 31 and the first eddy current sensor 32 respectively. The pressure film sensor 33 is located above the printing nozzle 31, and the printing nozzle 31 is located above the printing base plate structure 1. It is used to control the printing nozzle 31 to move vertically downward and directly press against the printing base plate structure 1, so that the reaction force of the printing nozzle 31 can be synchronously transmitted to the pressure film sensor 33. When the pressure film sensor 33 detects a pressure signal, the distance h2 between the printing nozzle 31 and the printing base plate structure 1 is calibrated to 0, and then the height distance is monitored according to the first eddy current sensor 32.

[0058] Example 3

[0059] In Example 3, the same symbols are used for the same structures as in Examples 1 and 2, and the same descriptions are omitted. The difference between Example 3 and Examples 1 and 2 is that, please refer to... Figures 9 to 11 The first-layer height automatic detection architecture further includes a nozzle monitoring structure 4, which includes a second eddy current sensor 41 and a sensing plate 42. The sensing plate 42 is fixedly connected to the printing nozzle 31. The second eddy current sensor 41 is positioned such that its monitoring end corresponds to that of the sensing plate 42. The second eddy current sensor 41 detects the distance h3 between itself and the sensing plate 42 in real time, controlling the printing nozzle 31 to vertically descend and directly press against the printing base plate structure 1. At this time, the distance h2 between the printing nozzle 31 and the printing base plate structure 1 is calibrated to 0. Based on the distance h3, the distance between the sensing plate 42 and the printing base plate structure 1 in the current state is determined as the reference distance h. 02 The printing nozzle 31 continues to move upwards at intervals along the height direction. The second eddy current sensor 41 detects the change in the distance h3 between the nozzle and the sensor plate 42 in real time, and obtains the change in the sensor magnetic field when the sensor plate 42 and the printing nozzle 31 are at different heights. The sensor magnetic field change is correlated with the corresponding height change to obtain a fitting curve. Then, the second eddy current sensor 41 can be used to obtain the fitting curve and the reference distance h3. 02 The system detects the rise and fall of the printing nozzle 31 in real time and the distance h2 between it and the printing base plate structure 1, thereby cooperating with the first eddy current sensor 32 to further optimize the overall printing effect in the printing task.

[0060] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An automatic first-layer height detection architecture based on a 3D printer, characterized in that, include: Printing base plate structure; The printing assembly structure includes a printing nozzle and a first eddy current sensor that are fixedly connected together. The first eddy current sensor and the printing base plate structure are detachably and vertically corresponding. The first eddy current sensor monitors in real time the distance values ​​between itself and the printing nozzle and the printing base plate structure, respectively.

2. The automatic first-layer height detection architecture based on a 3D printer according to claim 1, characterized in that, Also includes: The tool setting device structure has a detachable vertically aligned contact switch and the printing nozzle. When the contact switch of the tool setting device structure detects that it is pressed by the printing nozzle, the distance between the printing nozzle and the printing base plate structure is calibrated to a reference distance value for calculation in the current state.

3. The automatic first-layer height detection architecture based on a 3D printer according to claim 2, characterized in that, The printing base plate structure and the tool setting device structure are fixedly arranged relative to each other, and the tool setting device structure is located on one side of the printing base plate structure.

4. The automatic first-layer height detection architecture based on a 3D printer according to claim 2, characterized in that, The tool setting device structure includes an assembly body and a tool setting contact switch; The knife-type pressure switch is slidably mounted on the assembly body, and a spring is also mounted between the base of the knife-type pressure switch and the assembly body.

5. The automatic first-layer height detection architecture based on a 3D printer according to claim 1, characterized in that, The printing assembly structure also includes a pressure film sensor; The monitoring end of the pressure film sensor is connected to the printing nozzle via a transmission connection.

6. The automatic first-layer height detection architecture based on a 3D printer according to claim 5, characterized in that, The pressure film sensor is fixedly connected to the printing nozzle and the first eddy current sensor respectively, and the pressure film sensor is located above the printing nozzle.

7. The automatic first-layer height detection architecture based on a 3D printer according to claim 6, characterized in that, The printing nozzle is located above the printing base plate structure.

8. The automatic first-layer height detection architecture based on a 3D printer according to claim 1, characterized in that, Also includes: The nozzle monitoring structure is detachably and vertically aligned with the printing base plate structure.

9. The automatic first-layer height detection architecture based on a 3D printer according to claim 8, characterized in that, The nozzle monitoring structure includes a second eddy current sensor and a sensing plate; The sensing plate is fixedly connected to the printing nozzle, the second eddy current sensor is positioned, and the monitoring end of the second eddy current sensor is correspondingly positioned with respect to the sensing plate.

10. A 3D printer, characterized in that, Including the automatic first-layer height detection architecture based on a 3D printer as described in any one of claims 1-9.

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