CN115958792A - Printing quality analysis method and system of 3D printer - Google Patents

Abstract

The invention discloses a printing quality analysis method of a 3D printer. When the 3D printing starts, the printing quality analysis device communicates with the 3D printing equipment, sends an inquiry signal to the 3D printing equipment, and acquires the type information of the 3D printing equipment and the raw materials used. information; according to the obtained type information of the 3D printing equipment and the raw material information used, select the corresponding quality analysis strategy; after the quality analysis strategy is determined by the printing quality analysis device, an enabling signal is sent to the 3D printing equipment, and the 3D printing The device starts printing according to the received enabling signal; according to the determined quality analysis strategy, the quality analysis is performed on the printing model at a specific time point during printing. In the printing process of the present invention, different observation layers are set according to different strategies, compared with simulated layer pictures, and it is judged whether there is a problem in printing for quality analysis.

Description

A printing quality analysis method and system for a 3D printer

technical field

The invention relates to the technical field of three-dimensional printing, in particular to a method and system for analyzing the printing quality of a 3D printer.

Background technique

In the prior art, for example, the patent CN202210579365.9 discloses a 3D printer product quality analysis and control system, including a management platform, a rule database, a quality inspection module, a deployment control module, a production module, a finished product delivery module, a finished product storage warehouse, and sample extraction. module, a processing record module, a failsafe module, and a cloud storage platform; the quality inspection module is used to receive and perform quality inspection of each group of 3D printers called; the deployment control module is used to receive production plans and inspection results, and analyze its management.

The specific quality inspection method adopted is as follows: Step 1: The quality inspection module retrieves the database table Course from the rule database and builds a detection neural network model; Step 2: Scans the identification codes of each group of 3D printers to be inspected, and simultaneously The type of the 3D printer is uploaded to the detection neural network model, and the detection neural network model calls the relevant detection rules and detection parameters from the rule database according to the database table Course; the third step: the detection neural network model detects the parameters of each group of 3D printers At the same time, compare the test results with the industry standard, mark the 3D printers that do not meet the standards as unqualified, and mark the 3D printers that meet the standards as qualified; the fourth step: according to the number of qualified and unqualified 3D printers in this group Draw a histogram and a pie chart of the proportion of each group, and collect the past test results to draw a line chart of the qualified quantity and the unqualified quantity, and upload the three sets of data graphs to the management platform for the staff to view; the fifth step: detection The neural network communicates with the Internet in real time, and regularly obtains the industry standard parameters of the 3D printer for training updates.

At present, due to the fact that 3D printing technology has not yet formed a scale effect in practical applications, there are few evaluation methods for the quality of 3D printer prints, most of which are based on visual inspection, comparison, and descriptive content. The evaluation process is highly subjective, and the content Insufficient, the results are not objective and accurate enough, and lack the support of rational analysis and measurement data, which are mostly seen in evaluation articles on IT websites and 3D printing websites.

The performance indicators of 3D printer prints include: printing accuracy, minimum printing gap, resolution, bridging performance, drape performance, bonding strength, surface waviness, minimum printing layer thickness, verticality, etc., one or more of which are not It is impossible to better evaluate the quality of printed products, and currently there is no method for monitoring and scoring the quality of 3D printed works.

The existing 3D printer product quality analysis and control system cannot intuitively display the production quality situation to the staff, and it is necessary to manually collect data for data map drawing, which reduces the work efficiency of the staff. In addition, the existing 3D printer product quality analysis and control system cannot The optimization of the original abnormal production plan leads to low production quality of 3D printers, and the reliability and feasibility of the operation of the plan cannot be guaranteed. Therefore, we propose a 3D printer product quality analysis and control system.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention discloses a kind of print quality analysis method of 3D printer, and described method comprises the following steps:

Step 1, when 3D printing starts, the print quality analysis device communicates with the 3D printing device, sends an inquiry signal to the 3D printing device, and obtains the type information of the 3D printing device and the raw material information used;

Step 2, according to the acquired type information of the 3D printing equipment and the raw material information used, select the corresponding quality analysis strategy;

Step 3, after the print quality analysis device determines the quality analysis strategy, send an enabling signal to the 3D printing device, and the 3D printing device starts printing according to the received enabling signal;

Step 4, according to the determined quality analysis strategy, perform quality analysis on the printing model at a specific time point during printing.

Furthermore, the step 1 further includes: the 3D printing equipment is extrusion type (FDM), photocuring type (SLA, DLP) and powder type (SLS), and the raw material information used is PLA, ABS, Nylon, photosensitive resin, metal.

Furthermore, the step 2 further includes: after the quality analysis device obtains the type information of the 3D printing equipment and the information of the raw materials used, further obtain printing-related data, wherein the printing-related data is model data, used 3D modeling software ID and slicing software ID.

Further, said step 4 further includes:

Step 401, in the print quality analysis device, the print quality analysis device acquires the 3D modeling data corresponding to the printing work performed by the 3D printing device, wherein the 3D modeling data is obtained by using the 3D modeling software CAD, Creo, Sdidworks A three-dimensional digital model constructed by combining one or more of them or using a 3D scanner to scan the physical model to reversely obtain the three-dimensional digital model of the 3D printed product;

Step 402: Carry out meshing processing of the 3D digital model on the 3D modeling data, and convert the surface or curve of the model of the 3D modeling data into a mesh shape, which is closely connected by a series of triangular meshes. The smaller the size of the triangles in the grid, the smoother the surface formed by the mesh surface, which means the higher the geometric accuracy of the digital model. The quality analysis strategy is set differently for different types of printing equipment and material selection The control string height of the string height is changed by changing the setting of the string height to change the analog output accuracy of the three-dimensional digital model of the 3D printing device in the print quality analysis device, and generating gridded data according to the analog output accuracy;

Step 403, obtain the path planning of the 3D printing equipment, convert the three-dimensional digital model into a multi-layer two-dimensional digital model and further plan the processing path of each layer. The quality analysis strategy has different settings for different types of printing equipment and material selection The position and quantity of the observation layer, the observation layer corresponding to different types of printing equipment and printing materials used at that time are different;

Step 404, the print quality analysis device uses the same slicing software to slice the gridded data obtained in step 402 according to the simulation output accuracy according to the acquired slicing software ID, to obtain a model diagram corresponding to the observation layer;

Step 405, during 3D printing, when the number of layers where the observation layer is printed, obtain the image of the printed product, compare it with the model image corresponding to the observation layer obtained by the printing quality analysis device, and when the difference reaches the preset value, Send the interrupted printing consumption to the 3D printing device, and send an error message to the terminal device of the quality supervision manager.

Furthermore, changing the analog output accuracy of the three-dimensional digital model of the 3D printing device in the print quality analysis device by changing the setting of the chord height, and generating gridded data according to the analog output accuracy further includes: comparing the chord height The accuracy of the corresponding analog output is determined to be 50% to 85% according to the performance of the print quality analysis device.

The present invention also provides a printing quality analysis system for a 3D printer, the system includes a 3D printing device and a printing quality analyzing device, wherein the printing quality analyzing device communicates with the 3D printing device, and when the 3D printing starts, the printing The quality analysis device sends a communication signal to the 3D printing device to obtain the type information corresponding to the 3D printing device and the raw material information used in the current printing job;

The print quality analysis device includes a strategy selection unit, which selects the corresponding quality analysis strategy according to the acquired type information of the 3D printing equipment and the raw material information used, and sends an enable signal after the print quality analysis device determines the quality analysis strategy To the 3D printing device, the 3D printing device starts printing according to the received enabling signal; and the quality analysis unit performs quality analysis on the printing model at a specific time point during printing according to a determined quality analysis strategy.

Furthermore, the acquisition of the type information corresponding to the 3D printing device and the raw material information used in the current printing job further includes: the 3D printing device is extrusion type (FDM), photocuring type (SLA, DLP) and powder type (SLS), the raw material information used is PLA, ABS, nylon, photosensitive resin, metal.

Furthermore, after the quality analysis device obtains the type information of the 3D printing equipment and the raw material information used, it further obtains printing-related data, wherein the printing-related data is model data, 3D modeling software and slicing software used ID, wherein, wherein, the three-dimensional modeling data is a three-dimensional digital model constructed by using one or more combinations of three-dimensional modeling software CAD, Creo, Sdidworks or using a 3D scanner to scan a physical model to reversely obtain a 3D printed product 3D digital model.

Furthermore, the quality analysis strategy further includes: in the print quality analysis device, the print quality analysis device acquires 3D modeling data corresponding to the printing work performed by the 3D printing device; performs a 3D digital model on the 3D modeling data Meshing processing, the surface or curve of the model of the three-dimensional modeling data will be converted into a grid, and it is formed by a series of closely connected triangular meshes, wherein the smaller the triangle size in the mesh, the The smoother and smoother the surface formed by the mesh surface, the higher the geometric accuracy of the digital model. The quality analysis strategy sets different control chord heights for different types of printing equipment and material selection, and changes the 3D model by changing the chord height setting. According to the analog output accuracy of the three-dimensional digital model of the printing device in the print quality analysis device, gridded data is generated according to the analog output accuracy; the path planning of the 3D printing device is obtained, and the three-dimensional digital model is converted into a multi-layer two-dimensional digital Model and further plan the processing path of each layer. The quality analysis strategy sets different observation layer positions and quantities for different types of printing equipment and material selection, and the observation layer corresponding to different types of printing equipment and printing materials used at the time The situation is different; the print quality analysis device uses the same slicing software to slice the obtained gridded data generated according to the simulation output accuracy according to the obtained slicing software ID, and obtains the model diagram corresponding to the observation layer; when performing 3D printing , when the number of layers where the observation layer is printed is obtained, the image of the printed product is obtained, compared with the model map corresponding to the observation layer obtained by the print quality analysis device, and when the difference reaches a preset value, the interrupt printing consumption is sent to the 3D printing device , and send an error message to the terminal device of the quality supervision manager.

Furthermore, changing the analog output accuracy of the three-dimensional digital model of the 3D printing device in the print quality analysis device by changing the setting of the chord height, and generating gridded data according to the analog output accuracy further includes: comparing the chord height The corresponding analog output accuracy is determined to be 50% to 85% according to the performance of the print quality analysis device.

Compared with the prior art, the present invention has the beneficial effect that: for a distributed 3D printing equipment cluster, use one or several print quality analysis devices to connect with it, because the types of connected 3D printing equipment are not the same, the adopted The printing materials are also different, and the corresponding printing quality judgment methods are also different. Therefore, the present invention adopts a strategy of obtaining the type of printing equipment through the printing quality analysis device and then obtaining the corresponding quality evaluation strategy, and in order to prevent the printing quality analysis device from working If the load is too large, the computing power required by the calculation is reduced by reducing the simulation accuracy. Further, another beneficial effect of the present invention is that in printing, different observation layers are set according to different strategies, and the simulated layer images are compared with each other. Compare and judge whether there is a problem in printing for quality analysis.

Description of drawings

The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. In the figures, like reference numerals designate corresponding parts in the different views.

Fig. 1 is a flow chart of a printing quality analysis method of a 3D printer according to the present invention.

Detailed ways

The technical solution of the present invention will be described in more detail below with reference to the drawings and embodiments.

A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating description of the present invention and has no specific meaning by itself. Therefore, "module" and "component" may be used mixedly.

Mobile terminals may be implemented in various forms. For example, terminals described in the present invention may include devices such as mobile phones, smart phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Tablet Computers), PMPs (Portable Multimedia Players), navigation devices, etc. mobile terminals and fixed terminals such as digital TVs, desktop computers, etc. In the following, it is assumed that the terminal is a mobile terminal. However, those skilled in the art will understand that the configuration according to the embodiments of the present invention can also be applied to stationary type terminals, in addition to elements specifically used for mobile purposes.

A kind of printing quality analysis method of 3D printer as shown in Figure 1, described method comprises the steps:

Step 1, when 3D printing starts, the print quality analysis device communicates with the 3D printing device, sends an inquiry signal to the 3D printing device, and obtains the type information of the 3D printing device and the raw material information used;

Step 2, according to the acquired type information of the 3D printing equipment and the raw material information used, select the corresponding quality analysis strategy;

Step 3, after the print quality analysis device determines the quality analysis strategy, send an enabling signal to the 3D printing device, and the 3D printing device starts printing according to the received enabling signal;

Step 4, according to the determined quality analysis strategy, perform quality analysis on the printing model at a specific time point during printing.

Furthermore, the step 1 further includes: the 3D printing equipment is extrusion type (FDM), photocuring type (SLA, DLP) and powder type (SLS), and the raw material information used is PLA, ABS, Nylon, photosensitive resin, metal.

Furthermore, the step 2 further includes: after the quality analysis device obtains the type information of the 3D printing equipment and the information of the raw materials used, further obtain printing-related data, wherein the printing-related data is model data, used 3D modeling software ID and slicing software ID.

Further, said step 4 further includes:

Step 401, in the print quality analysis device, the print quality analysis device acquires the 3D modeling data corresponding to the printing work performed by the 3D printing device, wherein the 3D modeling data is obtained by using the 3D modeling software CAD, Creo, Sdidworks A three-dimensional digital model constructed by combining one or more of them or using a 3D scanner to scan the physical model to reversely obtain the three-dimensional digital model of the 3D printed product;

Step 402: Carry out meshing processing of the 3D digital model on the 3D modeling data, and convert the surface or curve of the model of the 3D modeling data into a mesh shape, which is closely connected by a series of triangular meshes. The smaller the size of the triangles in the grid, the smoother the surface formed by the mesh surface, which means the higher the geometric accuracy of the digital model. The quality analysis strategy is set differently for different types of printing equipment and material selection The control string height of the string height is changed by changing the setting of the string height to change the analog output accuracy of the three-dimensional digital model of the 3D printing device in the print quality analysis device, and generating gridded data according to the analog output accuracy;

Step 403, obtain the path planning of the 3D printing equipment, convert the three-dimensional digital model into a multi-layer two-dimensional digital model and further plan the processing path of each layer. The quality analysis strategy has different settings for different types of printing equipment and material selection The position and quantity of the observation layer, the observation layer corresponding to different types of printing equipment and printing materials used at that time are different;

Step 404, the print quality analysis device uses the same slicing software to slice the gridded data obtained in step 402 according to the simulation output accuracy according to the acquired slicing software ID, to obtain a model diagram corresponding to the observation layer;

Step 405, during 3D printing, when the number of layers where the observation layer is printed, obtain the image of the printed product, compare it with the model image corresponding to the observation layer obtained by the printing quality analysis device, and when the difference reaches the preset value, Send the interrupted printing consumption to the 3D printing device, and send an error message to the terminal device of the quality supervision manager.

Furthermore, changing the analog output accuracy of the three-dimensional digital model of the 3D printing device in the print quality analysis device by changing the setting of the chord height, and generating gridded data according to the analog output accuracy further includes: comparing the chord height The corresponding analog output accuracy is determined to be 50% to 85% according to the performance of the print quality analysis device.

The present invention also provides a printing quality analysis system for a 3D printer, the system includes a 3D printing device and a printing quality analyzing device, wherein the printing quality analyzing device communicates with the 3D printing device, and when the 3D printing starts, the printing The quality analysis device sends a communication signal to the 3D printing device to obtain the type information corresponding to the 3D printing device and the raw material information used in the current printing job;

The print quality analysis device includes a strategy selection unit, which selects the corresponding quality analysis strategy according to the acquired type information of the 3D printing equipment and the raw material information used, and sends an enable signal after the print quality analysis device determines the quality analysis strategy To the 3D printing device, the 3D printing device starts printing according to the received enabling signal; and the quality analysis unit performs quality analysis on the printing model at a specific time point during printing according to a determined quality analysis strategy.

Furthermore, the acquisition of the type information corresponding to the 3D printing device and the raw material information used in the current printing job further includes: the 3D printing device is extrusion type (FDM), photocuring type (SLA, DLP) and powder type (SLS), the raw material information used is PLA, ABS, nylon, photosensitive resin, metal.

Furthermore, after the quality analysis device obtains the type information of the 3D printing equipment and the raw material information used, it further obtains printing-related data, wherein the printing-related data is model data, 3D modeling software and slicing software used ID, wherein, wherein, the three-dimensional modeling data is a three-dimensional digital model constructed by using one or more combinations of three-dimensional modeling software CAD, Creo, Sdidworks or using a 3D scanner to scan a physical model to reversely obtain a 3D printed product 3D digital model.

Furthermore, the quality analysis strategy further includes: in the print quality analysis device, the print quality analysis device acquires 3D modeling data corresponding to the printing work performed by the 3D printing device; performs a 3D digital model on the 3D modeling data Meshing processing, the surface or curve of the model of the three-dimensional modeling data will be converted into a grid, and it is formed by a series of closely connected triangular meshes, wherein the smaller the triangle size in the mesh, the The smoother and smoother the surface formed by the mesh surface, the higher the geometric accuracy of the digital model. The quality analysis strategy sets different control chord heights for different types of printing equipment and material selection, and changes the 3D model by changing the chord height setting. According to the analog output accuracy of the three-dimensional digital model of the printing device in the print quality analysis device, gridded data is generated according to the analog output accuracy; the path planning of the 3D printing device is obtained, and the three-dimensional digital model is converted into a multi-layer two-dimensional digital Model and further plan the processing path of each layer. The quality analysis strategy sets different observation layer positions and quantities for different types of printing equipment and material selection, and the observation layer corresponding to different types of printing equipment and printing materials used at the time The situation is different; the print quality analysis device uses the same slicing software to slice the obtained gridded data generated according to the simulation output accuracy according to the obtained slicing software ID, and obtains the model diagram corresponding to the observation layer; when performing 3D printing , when the number of layers where the observation layer is printed is obtained, the image of the printed product is obtained, compared with the model map corresponding to the observation layer obtained by the print quality analysis device, and when the difference reaches a preset value, the interrupt printing consumption is sent to the 3D printing device , and send an error message to the terminal device of the quality supervision manager.

Furthermore, changing the analog output accuracy of the three-dimensional digital model of the 3D printing device in the print quality analysis device by changing the setting of the chord height, and generating gridded data according to the analog output accuracy further includes: comparing the chord height The corresponding analog output accuracy is determined to be 50% to 85% according to the performance of the print quality analysis device.

It should also be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes Other elements not expressly listed, or elements inherent in the process, method, commodity, or apparatus are also included. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems or computer program products. Accordingly, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

While the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. It is therefore intended that the foregoing detailed description be regarded as illustrative rather than restrictive, and that it be understood that the following claims, including all equivalents, are intended to define the spirit and scope of the invention. The above embodiments should be understood as only for illustrating the present invention but not for limiting the protection scope of the present invention. After reading the contents of the present invention, skilled persons can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims (10)

1. a print quality analysis method of 3D printer, is characterized in that, described method comprises the steps: Step 1, when 3D printing starts, the print quality analysis device communicates with the 3D printing device, sends an inquiry signal to the 3D printing device, and obtains the type information of the 3D printing device and the raw material information used; Step 2, according to the acquired type information of the 3D printing equipment and the raw material information used, select the corresponding quality analysis strategy; Step 3, after the print quality analysis device determines the quality analysis strategy, send an enabling signal to the 3D printing device, and the 3D printing device starts printing according to the received enabling signal; Step 4, according to the determined quality analysis strategy, perform quality analysis on the printing model at a specific time point during printing. 2. The printing quality analysis method of a kind of 3D printer as claimed in claim 1, it is characterized in that, described step 1 further comprises: described 3D printing equipment is extrusion type (FDM), photocuring type (SLA, DLP ) and powder type (SLS), the raw material information used is PLA, ABS, nylon, photosensitive resin, metal. 3. The printing quality analysis method of a 3D printer according to claim 1, wherein the step 2 further comprises: after the quality analysis device obtains the type information of the 3D printing equipment and the raw material information used, Further obtain printing-related data, wherein the printing-related data is model data, the ID of the 3D modeling software used, and the ID of the slicing software. 4. The printing quality analysis method of a kind of 3D printer as claimed in claim 1, is characterized in that, described step 4 further comprises: Step 401, in the print quality analysis device, the print quality analysis device acquires the 3D modeling data corresponding to the printing work performed by the 3D printing device, wherein the 3D modeling data is obtained by using the 3D modeling software CAD, Creo, Sdidworks A three-dimensional digital model constructed by combining one or more of them or using a 3D scanner to scan the physical model to reversely obtain the three-dimensional digital model of the 3D printed product; Step 402: Carry out meshing processing of the 3D digital model on the 3D modeling data, and convert the surface or curve of the model of the 3D modeling data into a mesh shape, which is closely connected by a series of triangular meshes. The smaller the size of the triangles in the grid, the smoother the surface formed by the mesh surface, which means the higher the geometric accuracy of the digital model. The quality analysis strategy is set differently for different types of printing equipment and material selection The control string height of the string height is changed by changing the setting of the string height to change the analog output accuracy of the three-dimensional digital model of the 3D printing device in the print quality analysis device, and generating gridded data according to the analog output accuracy; Step 403, obtain the path planning of the 3D printing equipment, convert the three-dimensional digital model into a multi-layer two-dimensional digital model and further plan the processing path of each layer. The quality analysis strategy has different settings for different types of printing equipment and material selection The location and quantity of the observation layer, the observation layer corresponding to different types of printing equipment and printing materials used at that time are different; Step 404, the print quality analysis device uses the same slicing software to slice the gridded data obtained in step 402 according to the simulation output accuracy according to the acquired slicing software ID, to obtain a model diagram corresponding to the observation layer; Step 405, during 3D printing, when the number of layers where the observation layer is printed, obtain the image of the printed product, compare it with the model image corresponding to the observation layer obtained by the printing quality analysis device, and when the difference reaches the preset value, Send the interrupted printing consumption to the 3D printing device, and send an error message to the terminal device of the quality supervision manager. 5. the print quality analysis method of a kind of 3D printer as claimed in claim 4, is characterized in that, described by changing the setting of chord height to change the simulation of the three-dimensional digital model of 3D printing equipment in the described print quality analysis device The output accuracy, generating gridded data according to the analog output accuracy further includes: determining the accuracy as 50% to 85% according to the performance of the print quality analysis device according to the analog output accuracy corresponding to the chord height. 6. A print quality analysis system for a 3D printer, characterized in that the system includes a 3D printing device and a print quality analysis device, wherein the print quality analysis device communicates with the 3D printing device, and when 3D printing starts, the The print quality analysis device sends a communication signal to the 3D printing device to obtain the type information corresponding to the 3D printing device and the raw material information used in the current printing job; The print quality analysis device includes a strategy selection unit, which selects the corresponding quality analysis strategy according to the acquired type information of the 3D printing equipment and the raw material information used, and sends an enable signal after the print quality analysis device determines the quality analysis strategy To the 3D printing device, the 3D printing device starts printing according to the received enabling signal; and the quality analysis unit performs quality analysis on the printing model at a specific time point during printing according to a determined quality analysis strategy. 7. The print quality analysis system of a 3D printer according to claim 6, wherein said obtaining the type information corresponding to the 3D printing device and the raw material information used in the current printing job further comprises: said 3D printing device Extrusion type (FDM), photocuring type (SLA, DLP) and powder type (SLS), the raw material information used is PLA, ABS, nylon, photosensitive resin, metal. 8. The print quality analysis system of a 3D printer according to claim 6, wherein after the quality analysis device acquires the type information of the 3D printing equipment and the information of the raw materials used, it further acquires printing-related data, wherein , the printing related data is model data, 3D modeling software and slicing software ID used, wherein, wherein, the 3D modeling data is a combination of one or more of the 3D modeling software CAD, Creo, Sdidworks The constructed 3D digital model or use the 3D scanner to scan the physical model to reversely obtain the 3D digital model of the 3D printed product. 9. The print quality analysis system of a 3D printer according to claim 6, wherein the quality analysis strategy further comprises: in the print quality analysis device, the print quality analysis device obtains the 3D printing equipment to perform printing The 3D modeling data corresponding to the work; the 3D digital model grid processing is performed on the 3D modeling data, and the surface or curve of the model of the 3D modeling data will be converted into a grid shape, and it is composed of a series of The triangular meshes are closely connected. Among them, the smaller the triangle size in the mesh, the smoother the surface formed by the mesh surface, which means the higher the geometric accuracy of the digital model. The quality analysis strategy is aimed at different types of printing equipment Setting a different control chord height from the material selection, changing the 3D digital model of the 3D printing device in the print quality analysis device by changing the setting of the chord height, and generating gridded data according to the simulation output accuracy; The path planning of 3D printing equipment converts the three-dimensional digital model into a multi-layer two-dimensional digital model and further plans the processing path of each layer. The quality analysis strategy sets different observation layer positions for different types of printing equipment and material selection and quantity, different types of printing equipment and the corresponding observation layer situation of the printing material adopted at the time are different; the print quality analysis device adopts the same slicing software to generate a grid according to the simulation output accuracy according to the obtained slicing software ID Slicing the transformed data to obtain the model map corresponding to the observation layer; during 3D printing, when the layer number of the observation layer is printed, the image of the printed product is obtained, and the model map corresponding to the observation layer obtained by the printing quality analysis device is carried out. In contrast, when the difference reaches the preset value, the interrupt printing consumption is sent to the 3D printing device, and an error message is sent to the terminal device of the quality supervision manager. 10. The print quality analysis system of a 3D printer according to claim 9, wherein the simulation of the three-dimensional digital model of the 3D printing device in the print quality analysis device is changed by changing the setting of the chord height The output accuracy, generating gridded data according to the analog output accuracy further includes: determining the accuracy as 50% to 85% according to the performance of the print quality analysis device according to the analog output accuracy corresponding to the chord height.

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