Light-weight honeycomb structure shoe mold printing method based on SLM technology

Abstract

The invention discloses a lightweight honeycomb structure shoe mold printing method based on an SLM process, and the method specifically comprises the following steps: S1, building a three-dimensional model of a shoe mold, and carrying out honeycomb embedding on the three-dimensional model of the shoe mold to obtain a lightweight three-dimensional shoe mold model; s2, the lightweight three-dimensional shoe mold model is uploaded to Msgics software for slicing processing and scanning strategy planning, and the lightweight three-dimensional shoe mold model is uploaded to SLM forming equipment; s3, after parameter setting is carried out on the SLM forming equipment, entity printing of the three-dimensional shoe mold model is carried out according to a scanning strategy; the invention relates to the technical field of additive manufacturing. According to the light-weight honeycomb structure shoe mold printing method based on the SLM process, through arrangement of honeycomb holes, the material consumption is reduced, meanwhile, light-weight design of the shoe mold is achieved, through edge enhancement design of the honeycomb structure, the bearing performance, the elastic modulus and the yield strength of the shoe mold are effectively improved, and the printing quality of the shoe mold is improved. And the high-efficiency preparation targets of light weight, high performance and low cost of the shoe mold are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and specifically to a method for printing a lightweight honeycomb structure shoe mold based on the SLM process. Background Art

[0002] A shoe mold generally refers to molds for shoes such as sports shoes, beach shoes, slippers, rubber shoes, etc., mainly sports shoes. A mold refers to various molds and tools used in industrial production to obtain the required products by methods such as injection molding, blow molding, extrusion, die casting, or forging, smelting, stamping, stretching, etc. However, conventional shoe molds cannot meet the requirements of small-scale customization and personalized production.

[0003] 3D printing, also known as additive manufacturing, is an advanced manufacturing technology that creates complex structures by layer-by-layer material deposition. The principle of 3D printing is based on the "discrete - accumulation" concept. It first slices a three-dimensional model to form layer-by-layer cross-sectional data. Then, the printer uses methods such as laser beams and hot melt nozzles to deposit and bond materials layer by layer according to this data, ultimately shaping a three-dimensional entity, which provides effective support for the small-scale customization and personalized production of shoe molds.

[0004] With small-scale customization and personalized production, there is a problem of relatively high customization costs. Moreover, conventional shoe molds are heavy and have poor compressive performance, and it is impossible to achieve lightweight and high-performance preparation of shoe molds. Therefore, a method for printing a lightweight honeycomb structure shoe mold based on the SLM process is specifically proposed. While reducing the material usage, it can also improve the structural stability of the shoe mold, realizing low-cost customization of high-performance and lightweight shoe molds. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for printing a lightweight honeycomb structure shoe mold based on the SLM process, which solves the problems of relatively high shoe mold customization costs, heavy weight of conventional shoe molds, poor compressive performance, and inability to achieve lightweight and high-performance preparation of shoe molds.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A method for printing a lightweight honeycomb structure shoe mold based on the SLM process specifically includes the following steps:

[0007] S1. Build a three-dimensional model of the shoe mold, and perform honeycomb embedding on the three-dimensional shoe mold model to obtain a lightweight three-dimensional shoe mold model;

[0008] S2. Upload the lightweight three-dimensional shoe mold model to the Msgics software for slicing processing and scanning strategy planning, and then upload it to the SLM forming equipment;

[0009] S3. After determining the parameters of the SLM forming equipment, perform solid printing of the three-dimensional shoe mold model according to the scanning strategy.

[0010] The present invention is further configured such that the method for honeycomb embedding the three-dimensional model of the shoe mold in S1 includes:

[0011] Honeycomb holes are dug in the wall of the three-dimensional model of the shoe mold, and six edges extend from the center of the honeycomb hole to the six inner angles of the honeycomb hole to complete the edge strengthening design.

[0012] The present invention is further configured such that the parameters determined in S3 include: powder spreading layer thickness, substrate temperature, air pressure, and preset number of scanning layers.

[0013] The present invention is further configured such that the method for solid printing the three-dimensional shoe mold model in S3 includes:

[0014] After the three-dimensional shoe mold model is sliced, a number of layers to be printed are obtained;

[0015] The laser emits a laser beam for scanning according to the scanning path set in the scanning strategy. The powder at the scanning path is completely melted and then solidified under the high temperature of the laser. After the preparation of the bottommost layer to be printed in the forming chamber is completed, the forming chamber descends by a height, and the powder chamber ascends by a height;

[0016] The laser emits a laser beam for scanning again according to the scanning path set in the scanning strategy. The powder at the scanning path is completely melted and then solidified under the high temperature of the laser. After the powder is melted and solidified, it forms a metallurgical bond with the previously formed layer to be printed. For each layer of the layer to be printed prepared, the forming chamber descends by a height, and the powder chamber ascends by a height until the preparation of all layers to be printed is completed. At this time, the solid printing of the three-dimensional shoe mold model is completed.

[0017] The present invention is further configured such that during the process of the laser emitting a laser beam for scanning according to the scanning path set in the scanning strategy, an inert gas is filled into and fills the forming chamber until the solid printing of the three-dimensional shoe mold model is completed.

[0018] The present invention provides a method for printing a lightweight honeycomb structure shoe mold based on the SLM process. It has the following beneficial effects:

[0019] Through the setting of honeycomb holes, while reducing the material consumption, the lightweight design of the shoe mold is realized. Through the edge strengthening design of the honeycomb structure, the bearing performance, elastic modulus, and yield strength of the shoe mold are effectively improved, achieving the goal of efficient preparation of lightweight, high-performance, and low-cost shoe molds. Description of the Drawings

[0020] Figure 1 is a flow schematic diagram of the present invention;

[0021] Figure 2 is a schematic diagram of the stress distribution of the honeycomb structure in the embodiment of the present invention;

[0022] Figure 3 It is a layout schematic diagram of the honeycomb structure in the embodiment of the present invention. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Please refer to Figures 1-3 , the embodiments of the present invention provide the following technical solutions:

[0025] Embodiment 1

[0026] A lightweight honeycomb structure shoe mold printing method based on the SLM process specifically includes the following steps:

[0027] S1. Build a three-dimensional model of the shoe mold and perform honeycomb embedding on the three-dimensional model of the shoe mold to obtain a lightweight three-dimensional shoe mold model. Among them, the method of performing honeycomb embedding on the three-dimensional model of the shoe mold includes:

[0028] Dig honeycomb holes in the wall of the three-dimensional model of the shoe mold, and extend six edges from the center of the honeycomb hole to the six inner corners of the honeycomb hole to complete the edge enhancement design.

[0029] S2. Upload the lightweight three-dimensional shoe mold model to the Msgics software for slicing processing and scanning strategy planning, and then upload it to the SLM forming device.

[0030] After determining the parameters of the SLM forming device, the parameters include: powder laying layer thickness, substrate temperature, air pressure, and preset scanning layers. Perform solid printing of the three-dimensional shoe mold model according to the scanning strategy. The scanning strategy includes but is not limited to the scanning path. The method of performing solid printing of the three-dimensional shoe mold model includes:

[0031] After slicing the three-dimensional shoe mold model, obtain several layers to be printed;

[0032] The laser emits a laser beam for scanning according to the scanning path set in the scanning strategy. The powder at the scanning path is completely melted and then solidified under the high temperature of the laser. After completing the preparation of the bottommost layer to be printed in the forming chamber, the forming chamber descends by one height, and the powder chamber rises by one height;

[0033] The laser emits a laser beam for re-scanning according to the scanning path set in the scanning strategy. The powder at the scanning path is completely melted and then solidified under the high temperature of the laser. After the powder is melted and solidified, it forms a metallurgical bond with the previously formed layer to be printed. After completing the preparation of each layer to be printed, the forming chamber descends by one height, and the powder chamber rises by one height until the preparation of all layers to be printed is completed. At this time, the solid printing of the three-dimensional shoe mold model is completed.

[0034] It should be noted that in order to avoid oxidation during the printing process, while the laser emits a laser beam for scanning according to the scanning path set in the scanning strategy, an inert gas is filled into and fills the forming chamber until the solid printing of the three-dimensional shoe mold model is completed.

[0035] Embodiment 2

[0036] The difference between this embodiment and Embodiment 1 is that:

[0037] The method of honeycomb embedding for the three-dimensional shoe mold model includes:

[0038] As shown in FIG. a in the appendix and FIG. Figure 2 in the appendix, honeycomb holes are dug in the wall of the three-dimensional shoe mold model. Figure 3 as shown.

[0039] Embodiment 3

[0040] The difference between this embodiment and Embodiment 1 is that:

[0041] The method of honeycomb embedding for the three-dimensional shoe mold model includes:

[0042] Honeycomb holes are dug in the wall of the three-dimensional shoe mold model, and planar reinforcement design is carried out in the honeycomb holes, as shown in FIG. c in the appendix. Figure 2 as shown.

[0043] Simulation experiment

[0044] For the three-dimensional shoe mold models solidly printed according to Embodiment 1, Embodiment 2, and Embodiment 3, their corresponding honeycomb structures are respectively: edge-reinforced honeycomb structure BEEH, regular hexagon honeycomb structure HH, and planar-reinforced honeycomb structure BPEH.

[0045] As shown in the appendix Figure 2 as shown, a force of 5000 N is applied above the honeycomb structure, and the test results are shown in Table 1:

[0046]

[0047] Table 1

[0048] As can be seen from Table 1, the maximum deformation amounts of the regular hexagon honeycomb structure HH, the edge-reinforced honeycomb structure BEEH, and the planar-reinforced honeycomb structure BPEH are respectively 4.16×10 -2 mm and 1.56×10 -2 mm and 3.95×10 -2 mm. It can be seen that the deformation of the porous structure of the edge-reinforced honeycomb structure BEEH is the most uniform, and the average deformation amount is 0.68×10 -2mm. The plane-reinforced honeycomb structure BPEH has a porous structure ranking second, with an average deformation of 1.42×10 -2 mm. Under the condition of the same load, the stress distribution and deformation of the BEEH porous structure are more uniform, with less stress concentration, and the structure has the best load-bearing performance.

[0049] The elastic modulus, yield strength, specific stiffness, and specific strength of the edge-reinforced honeycomb structure BEEH, regular hexagonal honeycomb structure HH, and plane-reinforced honeycomb structure BPEH were tested, and the results are shown in Table 2:

[0050]

[0051] Table 2

[0052] As can be seen from Table 2, the elastic modulus and yield strength from large to small are as follows: the edge-reinforced honeycomb structure BEEH, the plane-reinforced honeycomb structure BPEH, and the regular hexagonal honeycomb structure HH; compared with the regular hexagonal honeycomb structure HH, the elastic modulus of the edge-reinforced honeycomb structure BEEH and the plane-reinforced honeycomb structure BPEH increased by 121.83% and 76.75% respectively; compared with the regular hexagonal honeycomb structure HH, the yield strength of the edge-reinforced honeycomb structure BEEH and the plane-reinforced honeycomb structure BPEH also increased significantly, by 163.20% and 102.30% respectively. The specific strength and specific stiffness of the edge-reinforced honeycomb structure BEEH and the plane-reinforced honeycomb structure BPEH are approximately twice that of the regular hexagonal honeycomb structure HH, and the mechanical properties are more excellent.

[0053] In summary, the invention cleverly incorporates the design of the edge-reinforced honeycomb structure during the SLM printing process to achieve the lightweight treatment of the product. This design effectively reduces the material usage while improving the original mechanical properties of the product, thereby achieving the purpose of cost control.

[0054] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for printing a lightweight honeycomb structure shoe mold based on the SLM process, characterized in that: Specifically, it includes the following steps: S1. Build a three-dimensional model of the shoe mold, and perform honeycomb embedding on the three-dimensional shoe mold model to obtain a lightweight three-dimensional shoe mold model; S2. Upload the lightweight three-dimensional shoe mold model to the Msgics software for slicing processing and scanning strategy planning, and then upload it to the SLM forming equipment; S3. After formulating the parameters of the SLM forming equipment, perform solid printing of the three-dimensional shoe mold model according to the scanning strategy.

2. The lightweight honeycomb structure shoe mold printing method based on the SLM process according to claim 1, wherein: The method of honeycomb embedding the three-dimensional shoe mold model in S1 includes: Dig honeycomb holes in the wall of the three-dimensional shoe mold model, and extend six edges from the center of the honeycomb holes to the six inner corners of the honeycomb holes to complete the edge reinforcement design.

3. The lightweight honeycomb structure shoe mold printing method based on the SLM process according to claim 1, characterized in that: The parameters formulated in S3 include: powder spreading layer thickness, substrate temperature, air pressure, and preset scanning layer number.

4. The lightweight honeycomb structure shoe mold printing method based on the SLM process according to claim 1, characterized in that: The method of solid printing the three-dimensional shoe mold model in S3 includes: After the three-dimensional shoe mold model is sliced, several layers to be printed are obtained; The laser emits a laser beam for scanning according to the scanning path set in the scanning strategy. The powder at the scanning path is completely melted and then solidified under the high temperature of the laser. After the preparation of the bottommost layer to be printed in the forming chamber is completed, the forming chamber descends by a height, and the powder chamber ascends by a height; The laser emits a laser beam for scanning again according to the scanning path set in the scanning strategy. The powder at the scanning path is completely melted and then solidified under the high temperature of the laser. After the powder is melted and solidified, it forms a metallurgical bond with the previously formed layer to be printed. After the preparation of each layer to be printed is completed, the forming chamber descends by a height, and the powder chamber ascends by a height until the preparation of all layers to be printed is completed. At this time, the solid printing of the three-dimensional shoe mold model is completed.

5. The lightweight honeycomb structure shoe mold printing method based on the SLM process according to claim 4, characterized in that: During the process of the laser emitting a laser beam for scanning according to the scanning path set in the scanning strategy, an inert gas is filled into and fills the forming chamber until the solid printing of the three-dimensional shoe mold model is completed.

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