A manufacturing method for 3D printing load-bearing objects, a 3D printing device, and a storage medium

Abstract

The present invention provides a manufacturing method, a 3D printing device and a storage medium for 3D printing load-bearing articles. First, a standard model is determined, and standard model data is obtained, including the standard lattice rod diameter d s , the standard horizontal inclination angle θ s and the standard weight data F s ; then, according to the input target weight data F t , target model data is generated and the target model is printed, so that the bending stress σ t corresponding to the target model under the target weight data is consistent with the bending stress σ s corresponding to the standard model under the standard weight data. By adjusting the target lattice rod diameter and the target horizontal inclination angle, the target model can be quickly generated and printed. The present invention adjusts and changes the model according to the target weight data of the user, meeting the requirements of the same performance such as the softness, hardness and supportability of the printed product under different weight requirements.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing, and particularly to a manufacturing method for 3D printing load-bearing articles, a 3D printing device, and a storage medium. Background Art

[0002] In recent years, the stereolithography 3D printing technology has developed rapidly, and currently the 3D printing technology has achieved extensive commercial applications in various fields. 3D printed load-bearing articles have the advantages of rich shapes, good resilience, breathability, light weight, etc. However, there are still some problems that cannot be overcome. After the load-bearing articles are printed, parameters such as their resilience and support performance are fixed. Taking 3D printed shoes as an example, for people of different weights wearing shoes of the same model, the feeling of the feet is different. When a person with a light weight feels that the feeling of the feet is too hard, a person with a large weight feels that the feeling of the feet is too soft and easy to deform.

[0003] How to provide load-bearing articles with different support performances for users of different weights is an urgent problem to be solved. For this reason, the present invention provides a manufacturing method for 3D printing load-bearing articles to meet the requirements of the same softness or comfort of load-bearing articles for different weight items. Summary of the Invention

[0004] In view of the above problems, the present invention provides a manufacturing method for 3D printing load-bearing articles, including the following steps:

[0005] S1: Determine a standard model and obtain standard model data, where the standard model data includes a standard lattice rod diameter ds, a standard horizontal inclination angle θs, and standard weight data Fs;

[0006] S2: Input target weight data Ft;

[0007] S3: Generate target model data based on the target weight data Ft and print a target model, so that the bending stress σt corresponding to the target weight data of the target model is consistent with the bending stress σs corresponding to the standard weight data of the standard model.

[0008] Further, in step S3, by changing the lattice rod diameter, the bending stress σt corresponding to the target weight data is made consistent with the bending stress σs corresponding to the standard printing model in the standard weight data, where the target lattice rod diameter adapted to the target weight data Ft is dt.

[0009] Further, the following relationship is satisfied between the target lattice rod diameter dt and the target weight data Ft: where n is an adjustment coefficient, and n = 0.7 - 1.3.

[0010] Further, in step S3, by changing the horizontal inclination angle θ between the lattice rod and the horizontal plane, the bending stress σt corresponding to the target weight data is made to be the same as the bending stress σs corresponding to the standard printing model at the standard weight data, where the target horizontal inclination angle adapted to the target weight data Ft is θt.

[0011] Further, the relationship between the target horizontal inclination angle θt and the target weight data Ft is as follows: where m is an adjustment coefficient, -5° < m < 5°, and 0° < θt < 90°.

[0012] Further, the load-bearing article is one of shoes and sole products, orthopedic appliances, pillows, shock-absorbing members or cushions.

[0013] The present invention further provides a 3D printing device, which includes a storage device and a processing device. The storage device is used to store at least one program, and the processing device is connected to the storage device and is used to execute at least one program to coordinate the storage device to execute and implement the above-mentioned manufacturing method of a 3D printed load-bearing article.

[0014] The present invention further provides a computer-readable storage medium, which stores at least one program, and the at least one program realizes the above-mentioned manufacturing method of a 3D printed load-bearing article when being called.

[0015] The present invention provides a manufacturing method of a 3D printed load-bearing article, a 3D printing device and a storage medium. First, a standard model is determined, and standard model data is obtained, including a standard lattice rod diameter ds, a standard horizontal inclination angle θs and a standard weight data Fs; then, target model data is generated according to the input target weight data Ft and the target model is printed, so that the bending stress σt corresponding to the target model at the target weight data is the same as the bending stress σs corresponding to the standard model at the standard weight data. By adjusting the target lattice rod diameter and the target horizontal inclination angle, the target model can be quickly generated and printed. The present invention adjusts and changes the model according to the target weight data of the user, meeting the requirements of different weight articles for the same softness and comfort of the load-bearing article. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flowchart of a manufacturing method of a 3D printed load-bearing article according to the present invention;

[0017] Figure 2 is a schematic diagram of a lattice rod in a manufacturing method of a 3D printed load-bearing article according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To further understand the purpose, structure, features, and functions of the present invention, the following is a detailed description in conjunction with embodiments.

[0019] In view of the above problems, the present invention provides a manufacturing method for 3D printing load-bearing articles. Refer to Figure 1 , Figure 1 which is a flowchart of a manufacturing method for 3D printing load-bearing articles according to the present invention, and includes the following steps:

[0020] S1: Determine a standard model and obtain standard model data, which includes a standard lattice rod diameter ds, a standard horizontal inclination angle θs, and standard weight data Fs;

[0021] S2: Input target weight data Ft;

[0022] S3: Generate target model data based on the target weight data Ft and print the target model, so that the bending stress σt corresponding to the target weight data of the target model is consistent with the bending stress σs corresponding to the standard weight data of the standard printed model.

[0023] First, determine the standard model and obtain the standard model data, including the standard lattice rod diameter ds, the standard horizontal inclination angle θs, and the standard weight data Fs. The standard model data refers to the standard comfort of a standard weight item stepping on the load-bearing article. The standard foot feeling means that when a person steps on the load-bearing article, the foot feeling is moderate, neither too soft nor too hard. Input the target weight data Ft. The unit of the standard weight data and the target weight data is kg. The target weight data Ft can be the manually input target weight data or can directly connect to a weighing scale to read the target weight data in real time. The present invention does not make any restrictions. Finally, generate the target model data based on the target weight data Ft and print the target model, so that the bending stress σt corresponding to the target weight data of the target model is consistent with the bending stress σs corresponding to the standard weight data of the standard model. The manufacturing method for 3D printing load-bearing articles provided by the present invention adjusts the model according to the user's target weight to meet the requirement that different weight items have the same comfort or softness / hardness feeling for the load-bearing article.

[0024] The load-bearing article printed by 3D printing is composed of several continuous lattice structures. For the load-bearing article, the diameter of the rods in the lattice will directly affect the supporting performance of the load-bearing article. The structure of the lattice rods is shown in Figure 2 , Figure 2Schematic diagram of the lattice rod in a manufacturing method of a 3D printed load-bearing article according to the present invention. The present invention takes the intersecting lattice as an example, but does not limit the shape relationship of the lattice connections. Generally speaking, the larger the diameter of the lattice rod, the thicker the lattice rod, the greater the bending stress generated, and the stronger the corresponding supporting performance. For articles of different weights, lattice rods with appropriate diameters are selected for the design model. In the present invention, the stress generated by the designed target weight data Ft is the same as the stress generated by the standard weight data Fs in the standard model data. When the stress generated by a smaller weight pressing on the load-bearing article is the same as the stress generated by a larger weight pressing on the load-bearing article, their supporting properties, softness and hardness, resilience and other properties are also the same.

[0025] Since the relationship between the deformation of the load-bearing article and the supporting force can be described by Hooke's law, the basic form of Hooke's law is F = kx, where F is the applied force, x is the displacement of the object, and k is the elastic constant. In the actual operation process, the diameter of the lattice rod and the angle between the lattice rod and the ground need to be considered. In this case, the calculation formula for the bending stress σ of the load-bearing article is: σ = My / I, where M is the bending moment, y is the distance of the lattice rod from the central axis, and the value is half of the diameter d, and I is the area moment.

[0026] The bending moment is a kind of internal moment on the cross-section of the stressed load-bearing article, representing the moment required for the load-bearing article to bend. The calculation formula for the above-mentioned bending moment M is: M = FLcosθ, where F is the applied force, L is the length of the lattice rod, and θ is the horizontal inclination angle between the lattice rod and the ground and the horizontal plane.

[0027] The calculation formula for the above-mentioned area moment I is: where π is the pi, d is the diameter of the lattice rod, and the area moment refers to the degree of the distance of the centroid of the figure relative to the specified coordinate axis. The farther the centroid of the figure is from a certain coordinate, the greater the absolute value of the area moment with respect to the coordinate axis.

[0028] The above-mentioned target weight data F t The generated stress σ t =(32F t Lcosθ) / πd t 3 , where F t is the target weight data, L is the length of the lattice rod, θ is the horizontal inclination angle between the lattice rod and the horizontal plane, π is the pi, and d t is the diameter of the lattice rod.

[0029] According to the standard lattice diameter d s and the standard weight data F s in the standard model data, the stress σ s generated by the standard weight data Fs =(32F s Lcosθ s ) / πd s 3 , where F s is the standard weight data, L is the length of the lattice rod, θ s is the horizontal inclination angle between the lattice rod and the horizontal plane, π is the pi, d s is the standard lattice diameter. If different support performances are to be generated on the load-bearing article under different weight pressures, the stresses generated by their weights on the load-bearing article are the same, that is: σ t =σ s , σ t =(32F t Lcosθ t ) / πd t 3 When the length of the lattice rod and the horizontal inclination angle θ of the lattice rod remain unchanged, it can be obtained that:

[0030]

[0031] In some cases, d t may be fine-tuned due to special requirements. Therefore, in the preferred embodiments of the present application, an adjustment coefficient n is introduced, which can make the target lattice rod diameter d t and the target weight data F t satisfy the relationship: where n is the adjustment coefficient, n = 0.7 - 1.3. Typically, when making 3D printed shoes using the present application, since personal body sensations vary due to preferences, the adjustment coefficient can be further improved according to user preferences for comfort and for fine-tuning.

[0032] The load-bearing articles involved in the present invention include the soles of shoe products, orthopedic appliances that need to bear weight, pillows, shock-absorbing parts of spring shock absorbers, bicycle or electric vehicle seats, etc., and the present invention is not limited.

[0033] A typical application of the present application is customized 3D printed shoes, and the load-bearing article is the sole. For example, assume that the lattice rod diameter of the sole of a size 42 shoe is 1.1 mm, which is suitable for a person weighing 65 kg. At this time, the foot feeling is neither soft nor hard and is relatively comfortable. However, a person weighing 80 kg wearing this shoe will be too soft. According to the above formula, when the length of the lattice rod and the horizontal inclination angle of the lattice rod remain unchanged, and the adjustment coefficient n is taken as 1, the result of the target lattice rod diameter is: Therefore, for an item weighing 80 kg, the diameter of the lattice rods used in the sole is 1.1788 mm. The target model data is regenerated and the target model is printed. At this time, when a load-bearing item made by stepping on the target model with a target weight of 80 kg is used, the foot feeling is neither too soft nor too hard, but rather comfortable.

[0034] For 3D printed load-bearing items, during the design process of hollow load-bearing items, one or several standard lattices are used for lightweight filling. In addition to the diameter of the rods in the lattice directly affecting the support performance of the load-bearing item, the horizontal inclination angle between the lattice rods and the horizontal plane also affects the support performance of the load-bearing item. The horizontal inclination angle range of the lattice rods is from 0 degrees to 90 degrees. Specifically, the larger the horizontal inclination angle of the lattice rods, the closer the lattice rods are to being upright, and the stronger the generated support performance. According to the standard lattice diameter ds and the standard weight data Fs in the standard model data, the stress σs generated by the standard weight data Fs can be obtained as σs=(32FsLcosθs) / πds 3 , where Fs is the standard weight data, L is the length of the lattice rods, θs is the horizontal inclination angle between the lattice rods and the horizontal plane, π is the pi, and ds is the standard lattice diameter. If users with different weights need to step on the load-bearing item to generate the same comfort, the stress generated by their weights on the load-bearing item is the same, that is: σt = σs, σt=(32FtLcosθ t ) / πdt 3 , when the length of the lattice rods and the diameter of the lattice rods remain unchanged, it is convenient for fine-tuning, and the relationship between the target horizontal inclination angle θt and the target weight data Ft can be satisfied as: where m is the adjustment coefficient, -5° < m < 5°, and 0° < θt < 90°.

[0035] When the load-bearing item is a sole, for example, assume that the horizontal inclination angle of the lattice rods at a certain part of a size 42 shoe is 45 degrees and it is suitable for a person weighing 65 kg. At this time, the foot feeling is neither too soft nor too hard, but rather comfortable. However, a person weighing 80 kg will feel too soft when wearing this shoe. According to the above formula for calculation, when the length of the lattice rods and the diameter of the lattice rods remain unchanged and the adjustment coefficient m is taken as 0°, the target lattice rod horizontal inclination angle obtained is: Therefore, for an item weighing 80 kg, the horizontal inclination angle of the lattice rods used in the sole is 54.93°. The target model data is regenerated and the target model is printed. At this time, when a load-bearing item made by stepping on the target model with a target weight of 80 kg is used, the foot feeling is neither too soft nor too hard, but rather comfortable.

[0036] For users of different weights, the present invention changes the diameter of the lattice rod or the horizontal inclination angle of the lattice rod, so that the bending stress generated when a light item wears a load-bearing item is the same as the bending stress generated when a heavier person wears a load-bearing item, thereby meeting the requirement that users of different weights have the same softness or comfort level for the weighing item.

[0037] The present invention further provides a 3D printing device, including a storage device and a processing device. The storage device is used to store at least one program, and the processing device is connected to the storage device and is used to execute at least one program to coordinate the storage device to execute and implement the above-mentioned manufacturing method of a 3D printed load-bearing item.

[0038] The present invention further provides a computer-readable storage medium storing at least one program, and the at least one program, when called, implements the above-mentioned manufacturing method of a 3D printed load-bearing item. The computer-readable storage medium may be a tangible medium, which may contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium may be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include electrical connections based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0039] The present invention provides a manufacturing method of a 3D printed load-bearing item, a 3D printing device, and a storage medium. First, a standard model is determined, and standard model data is obtained, including the standard lattice rod diameter ds, the standard horizontal inclination angle θs, and the standard weight data Fs; then, target model data is generated according to the input target weight data Ft and the target model is printed, so that the bending stress σt corresponding to the target weight data of the target model is the same as the bending stress σs corresponding to the standard weight data of the standard model. By adjusting the target lattice rod diameter and the target horizontal inclination angle, the target model can be quickly generated and printed. The present invention adjusts the model according to the target weight data given by the user to meet the requirement that different weight items have the same softness and comfort level for the load-bearing item.

[0040] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0041] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a defined sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch instructions from the instruction execution system, apparatus, or device and execute the instructions), or used in combination with these instruction execution systems, apparatus, or devices.

[0042] The present invention has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and refinements made without departing from the spirit and scope of the present invention fall within the scope of patent protection of the present invention.

Claims

1. A manufacturing method for 3D printing load-bearing articles, characterized in that, The method comprises the following steps: S1: Determine the standard model, obtain the standard model data, where the standard model data includes standard model parameters and standard weight data F s , and the standard model parameters include the standard lattice rod diameter d s and / or the standard horizontal inclination angle θ s ; S2: Input the target weight data F t ; S3: Based on the target weight data F t Generate target model data and print the target model, such that the bending stress σ t of the target model corresponding to the target weight data is s consistent with the bending stress σ of the standard model corresponding to the standard weight data, and the target model data includes the target lattice rod body diameter and / or the target horizontal inclination angle.

2. The manufacturing method of a 3D printed load-bearing article according to claim 1, characterized in that, In step S3, by changing the diameter of the lattice rod, the bending stress σ corresponding to the target weight data t is made consistent with the bending stress σ corresponding to the standard weight data of the standard printing model, where the target lattice rod diameter d s adapted to the target weight data F t is used. t .

3. The manufacturing method of a 3D printed load-bearing article according to claim 2, characterized in that, The diameter d of the target lattice rod t and the target weight data F t satisfy the relationship: where n is an adjustment coefficient, and n = 0.7 - 1.

3.

4. The manufacturing method of a 3D printed load-bearing article according to claim 1, characterized in that, In step S3, by changing the horizontal inclination angle θ between the lattice rod and the horizontal plane, the bending stress σ corresponding to the target weight data t is made to be consistent with the bending stress σ corresponding to the standard weight data of the standard printing model, where the target horizontal inclination angle adapted to the target weight data F s is θ t . t .

5. The manufacturing method of a 3D printed load-bearing article according to claim 4, characterized in that, The target horizontal inclination angle is θ t and the target weight data F t satisfy the relationship: where m is an adjustment coefficient, -5° < m < 5°, and 0° < θ t < 90°.

6. The manufacturing method of a 3D printed load-bearing article according to claim 1, wherein The load-bearing article is one of shoes and sole products, orthopedic appliances, pillows, shock-absorbing members or seat cushions.

7. A 3D printing device, characterized in that, The 3D printing device includes a storage device and a processing device. The storage device is used for storing at least one program, and the processing device is connected to the storage device and is used for executing at least one program to coordinate the storage device to execute and implement a manufacturing method of a 3D printed load-bearing article as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, Storing at least one program, which implements a manufacturing method of a 3D printed load-bearing article as described in any one of claims 1 to 6 when being called.

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