3D printing internal supporting structure design method based on force transmission path analysis

A technology of structural design and internal support, applied in computing, instrumentation, electrical and digital data processing, etc., can solve the problems of non-optimal design effect, unreasonable topology structure, low molding efficiency, etc., to improve specific strength and improve molding efficiency. , the effect of promoting the application

Inactive Publication Date: 2019-10-25
YANSHAN UNIV
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  • Application Information

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Problems solved by technology

Since the size and density of the mesh and the thickness of the skin surface are chosen heuristically by the user, the design is far from optimal; for internal support structures based on the Selective Laser Melting (SLM) process, traditional support structures are also often present Unreasonable topological structure, redundant structure, low molding efficiency, etc.

Method used

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  • 3D printing internal supporting structure design method based on force transmission path analysis
  • 3D printing internal supporting structure design method based on force transmission path analysis
  • 3D printing internal supporting structure design method based on force transmission path analysis

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Embodiment Construction

[0035] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0036] A 3D printing internal support structure design method based on force transmission path analysis, the flow chart is as follows figure 1 shown. Firstly, the force transmission path of the structure is extracted, then the force transmission performance of the structure is evaluated according to the characteristics of the force transmission path, and the evaluation coefficient is determined; finally, based on the SLM process, the evaluation coefficient is applied to realize the layout optimization of the support structure.

[0037] The method content includes the following steps:

[0038] (1) Use the finite element simulation model to establish the finite element simulation model of the bearing structure, use the software to impose boundary conditions and solve the stati...

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Abstract

The invention discloses a 3D printing internal supporting structure design method based on force transmission path analysis, and belongs to the field of additive manufacturing structure optimization.The method comprises the following steps: establishing a finite element model of a bearing structure, applying boundary conditions and solving, extracting a stress component value of each node from afinite element analysis result, obtaining the stress component value at the mass center of each unit through interpolation, and substituting the stress component value into a formula to calculate an internal force transfer vector, namely a force transfer direction, of each unit; extracting the force transmission path of the structure, analyzing the characteristics of the ideal force transmission path, evaluating the force transmission performance of the structure according to the characteristics of the force transmission path, and determining an evaluation coefficient; and finally, based on anSLM process, applying an evaluation coefficient to guide density distribution of each unit to realize layout optimization of the support structure.

Description

technical field [0001] The invention belongs to the field of structural optimization of additive manufacturing, and relates to a method for designing an internal support structure of 3D printing based on force transmission path analysis. Background technique [0002] With the emergence of metal additive manufacturing technologies such as selective laser melting (SLM) technology, lightweight metal parts filled with internal support structures (hereinafter referred to as support structures) have gradually become a research hotspot in the lightweight design of equipment. Currently, support structure design mostly relies on commercial printer packages in 3D printing software, such as Shapeways, which works by simply hollowing out an object and filling its interior with a predefined mesh for strength. Since the size and density of the mesh and the thickness of the skin surface are chosen heuristically by the user, the design is far from optimal; for internal support structures ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/39G06F30/23G06F2119/06
Inventor 吴凤和裴国斌庄集超张伟
Owner YANSHAN UNIV
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