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Method for optimizing internal structure of 3D (Three-Dimensional) printed object

An internal structure, 3D printing technology, applied in the improvement of process efficiency, instruments, energy efficiency and other directions, can solve the problems of the appearance of the model, save materials, eliminate stress, and maximize the physical strength to volume ratio.

Active Publication Date: 2014-08-13
SHANDONG UNIV
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Problems solved by technology

In addition, Stava et al. proposed an iterative optimization method in 2012 (STAVA O.VANEK, J.BENES, B.CARR, N., AND MˇE545CH, R.2012. Stress relief: improving structural strength of 3D printable objects. ACM Trans .Graph.31,4(July),48:1–48:11), by digging holes inside the model, thickening the s

Method used

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  • Method for optimizing internal structure of 3D (Three-Dimensional) printed object

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[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] Such as Figure 7 As shown, a 3D printing technology based on the Voronoi diagram and FEM to optimize the internal structure of the object, for an initially given solid model S, different sets of external forces F, here we assume that the model can withstand such a solid state External force, that is, there will be no area where the stress is greater than the yield point inside the solid model; otherwise, the solid model cannot withstand such a large external force, and there is no need to solve the optimization.

[0049] Next, in the case of ensuring that the model can withstand the set of external forces F, optimize the volume W of the model S , the objective optimization function is

[0050] min α , β W S ( ...

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Abstract

The invention discloses a method for optimizing the internal structure of a 3D (Three-Dimensional) printed object. According to the method, based on Voronoi diagram and FEM (Finite Element Analysis Method), the stress diagram of a model under external force is calculated through the FEM, and an internal structure similar to honeycombs is calculated and generated in combination with the stress diagram through the Voronoi; the honeycomb-shaped structure can minimize consume materials while providing excellent structural strength, materials can be saved in the 3D printing process, and the internal structure similar to honeycombs of printed object can be endowed, given external force is supported, and the object is firmer and more solid.

Description

technical field [0001] The present invention relates to a method for optimizing the internal structure of an object for 3D printing, in particular to a method for optimizing the strength-to-volume ratio of an object based on Voronoi diagrams and finite element analysis. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. [0003] In recent years, 3D printing has been mentioned more and more, and the ability to print digital model files into physical objects has made it widely used in many industries. From the perspective of technical realization, 3D printing usually superimposes printing materials "layer by layer", thereby turning digital blueprints into real objects. Therefore, the volume of the model is directly related to the consumables in the printing process, and a large and com...

Claims

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Application Information

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IPC IPC(8): B29C67/00B22F3/105G06F17/50
CPCY02P10/25
Inventor 吕琳屠长河陈宝权陈学霖赵海森魏源樊庆楠
Owner SHANDONG UNIV
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