3D printing control method

Abstract

The invention relates to a 3D printing control method. The method comprises the steps that a target digital model is obtained; setting a plurality of size reference points in the target digital model, and constructing a plurality of reference sizes based on the plurality of size reference points; before the target digital model is printed, a standard model is printed based on the reference size, and after the standard model is cooled, the size of the cooled standard model is scanned; and calculating a shrinkage ratio based on the standard size of the standard model and the size of the cooled standard model, and performing 3D printing based on the shrinkage ratio and the plurality of reference sizes. Before formal printing, the shrinkage ratio of the standard model is tested, and during subsequent printing, the set size of printing is reversely deduced through the shrinkage ratio, so that the printing result is closer to the required size.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and specifically to a 3D printing control method. Background Art

[0002] 3D printing, also known as additive manufacturing (AM), is a technology that builds three-dimensional objects by stacking materials layer by layer. Unlike traditional subtractive manufacturing (such as turning, milling, etc.), 3D printing builds objects from scratch instead of cutting away unnecessary parts from a large piece of material. This technology is based on digital model files and eventually forms a physical object by stacking materials layer by layer.

[0003] During the 3D printing process, the material will shrink to a certain extent when it cools. Therefore, if you use an unknown material for printing, the cooling shrinkage size may be unknown, resulting in the final model not being consistent with the set size. Summary of the invention

[0004] In view of this, the purpose of this application is to provide a 3D printing control method that can solve the problems in the background technology.

[0005] In order to achieve the above purpose, this application adopts the following technical solutions:

[0006] A 3D printing control method of the present application includes:

[0007] Obtaining a target digital model;

[0008] Setting a plurality of dimension reference points in the target digital model, and constructing a plurality of reference dimensions based on the plurality of dimension reference points;

[0009] Before printing the target digital model, printing a standard model based on the reference size, and after the standard model is cooled, scanning the size of the cooled standard model;

[0010] The shrinkage ratio is calculated based on the standard size of the standard model and the size of the standard model after cooling, and 3D printing is performed based on the shrinkage ratio and the multiple reference sizes.

[0011] In one embodiment of the present application, a plurality of dimension reference points are set in the target digital model, and a plurality of reference dimensions are constructed based on the plurality of dimension reference points, including:

[0012] Extracting the central axis of the target digital model, and taking the target line segment where the central axis intersects with the target digital model;

[0013] Setting a plurality of center axis dividing points as dimension reference points to divide the target line segment into a plurality of sub-line segments;

[0014] Setting a horizontal plane at each mid-axis dividing point to intercept multiple horizontal sections of the target digital model;

[0015] The maximum and minimum dimensions of the points bisecting the corresponding central axis are extracted in each horizontal section, and the maximum and minimum dimensions of multiple horizontal sections are used as reference dimensions, and the distance between adjacent dimension reference points is used as a reference dimension.

[0016] In one embodiment of the present application, printing a standard model based on the reference size includes:

[0017] Select the sphere digital model and select a reference size as the set diameter of the sphere digital model;

[0018] A standard model is printed based on the set diameter to obtain a spherical solid model.

[0019] In one embodiment of the present application, scanning the size of the cooled standard model includes:

[0020] After the spherical solid model is cooled, the diameter of the spherical solid model is scanned based on a preset laser sensor to obtain the size of the cooled standard model.

[0021] In one embodiment of the present application, 3D printing is performed based on the shrinkage ratio and the multiple reference sizes, including:

[0022] calculating a printing size based on the shrinkage ratio and a plurality of reference sizes;

[0023] 3D printing control is performed based on the printing size.

[0024] The beneficial effects of the present application are as follows: a 3D printing control method of the present application obtains a target digital model; sets multiple size reference points in the target digital model, and constructs multiple reference sizes based on the multiple size reference points; before printing the target digital model, prints a standard model based on the reference size, and after the standard model is cooled, scans the size of the cooled standard model; calculates the shrinkage ratio based on the standard size of the standard model and the size of the cooled standard model, and performs 3D printing based on the shrinkage ratio and multiple reference sizes. The present application tests the shrinkage ratio of the standard model before formally printing, and in subsequent printing, reversely infers the set size of the print through the shrinkage ratio, so that the printing result is closer to the required size. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] Figure 1 The present invention is a flowchart of a 3D printing control method according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0029] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0030] Common 3D printing materials include: PLA (polylactic acid): Features: biodegradable, environmentally friendly; low printing temperature (180-220℃); smooth surface, rich colors; easy to print, suitable for beginners. ABS (acrylonitrile-butadiene-styrene copolymer): Features: high strength, high temperature resistance; high printing temperature (210-250℃); heated bed required; slight odor. PETG (polyethylene terephthalate): Features: high strength, good transparency; good weather resistance; not easy to crack; moderate printing temperature (220-250℃). TPU (thermoplastic polyurethane): Features: good flexibility, wear resistance; high printing temperature (220-250℃); suitable for making elastic parts. PC (polycarbonate): Features: high strength, high temperature resistance; high transparency; high printing temperature (250-300℃); heated bed required.

[0031] After cooling, the shrinkage ratios of the above materials are different, so it is difficult to set a universal shrinkage ratio for 3D printing.

[0032] Figure 1 This is a flowchart of a 3D printing control method shown in an exemplary embodiment of the present application, such as Figure 1 As shown: A 3D printing control method of this embodiment includes steps S110 to S140, which are described in detail as follows:

[0033] S110, obtaining a target digital model; the target digital model is a digital model created in 3D modeling software (such as Blender, SketchUp, Fusion 360, etc.).

[0034] S120, setting a plurality of dimension reference points on the target digital model, and constructing a plurality of reference dimensions based on the plurality of dimension reference points;

[0035] Specifically include:

[0036] Extracting the central axis of the target digital model, and taking the target line segment where the central axis intersects with the target digital model;

[0037] Setting a plurality of center axis dividing points as dimension reference points to divide the target line segment into a plurality of sub-line segments;

[0038] Setting a horizontal plane at each mid-axis dividing point to intercept multiple horizontal sections of the target digital model;

[0039] The maximum and minimum dimensions of the points bisecting the corresponding central axis are extracted in each horizontal section, and the maximum and minimum dimensions of multiple horizontal sections are used as reference dimensions, and the distance between adjacent dimension reference points is used as a reference dimension.

[0040] In the above process, the target digital model is divided into multiple segments, the size range (maximum size, maximum size) is collected in each segment, and then the distance between adjacent size reference points is used as the reference size. These sizes can reflect the size characteristics of the entire model.

[0041] S130, before printing the target digital model, printing a standard model based on the reference size, and after the standard model is cooled, scanning the size of the cooled standard model;

[0042] In the present application, a sphere digital model is selected, and a reference size is selected as a set diameter of the sphere digital model; a standard model is printed based on the set diameter to obtain a sphere physical model. After the sphere physical model is cooled, the diameter of the sphere physical model is scanned based on a preset laser sensor to obtain the size of the standard model after cooling.

[0043] 140 , calculating a shrinkage ratio based on a standard size of the standard model and a size of the standard model after cooling, and performing 3D printing based on the shrinkage ratio and the multiple reference sizes.

[0044] Finally, a printing size is calculated based on the shrinkage ratio and a plurality of reference sizes; and 3D printing control is performed based on the printing size.

[0045] The present application provides a 3D printing control method, which obtains a target digital model; sets multiple size reference points in the target digital model, and constructs multiple reference sizes based on the multiple size reference points; before printing the target digital model, prints a standard model based on the reference size, and after the standard model is cooled, scans the size of the cooled standard model; calculates the shrinkage ratio based on the standard size of the standard model and the size of the cooled standard model, and performs 3D printing based on the shrinkage ratio and multiple reference sizes. The present application tests the shrinkage ratio of the standard model before formally printing, and in subsequent printing, reversely infers the set size of the print through the shrinkage ratio, so that the printing result is closer to the required size.

[0046] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A 3D printing control method, characterized in that: include: Obtaining a target digital model; Setting a plurality of dimension reference points in the target digital model, and constructing a plurality of reference dimensions based on the plurality of dimension reference points; Before printing the target digital model, printing a standard model based on the reference size, and after the standard model is cooled, scanning the size of the cooled standard model; The shrinkage ratio is calculated based on the standard size of the standard model and the size of the standard model after cooling, and 3D printing is performed based on the shrinkage ratio and the multiple reference sizes.

2. A 3D printing control method according to claim 1, characterized in that: Setting a plurality of dimension reference points in the target digital model and constructing a plurality of reference dimensions based on the plurality of dimension reference points includes: Extracting the central axis of the target digital model, and taking the target line segment where the central axis intersects with the target digital model; Setting a plurality of center axis dividing points as dimension reference points to divide the target line segment into a plurality of sub-line segments; Setting a horizontal plane at each mid-axis dividing point to intercept multiple horizontal sections of the target digital model; The maximum and minimum dimensions of the points bisecting the corresponding central axis are extracted in each horizontal section, and the maximum and minimum dimensions of multiple horizontal sections are used as reference dimensions, and the distance between adjacent dimension reference points is used as a reference dimension.

3. A 3D printing control method according to claim 2, characterized in that: Print a standard model based on the reference dimensions, including: Select the sphere digital model and select a reference size as the set diameter of the sphere digital model; A standard model is printed based on the set diameter to obtain a spherical solid model.

4. A 3D printing control method according to claim 3, characterized in that: Scan the dimensions of the standard model after cooling, including: After the spherical solid model is cooled, the diameter of the spherical solid model is scanned based on a preset laser sensor to obtain the size of the cooled standard model.

5. A 3D printing control method according to claim 1, characterized in that: Performing 3D printing based on the shrinkage ratio and the multiple reference sizes includes: calculating a printing size based on the shrinkage ratio and a plurality of reference sizes; 3D printing control is performed based on the printing size.

Images