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Processing method of TPMS structure with continuous gradient wall thickness based on 3D printing

A technology of 3D printing and processing methods, applied in 3D modeling, instruments, design optimization/simulation, etc., to achieve wide selection and good control effect

Pending Publication Date: 2020-09-22
CHONGQING UNIV
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  • Abstract
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Problems solved by technology

[0004] A porous structure with thin-walled characteristics can be obtained by thickening the three-period minimal surface, and different porous structures can be obtained by changing the type of minimal surface and the amount of surface thickening, but there is currently no design of a thickened TPMS model with continuously changing wall thickness and processing method

Method used

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  • Processing method of TPMS structure with continuous gradient wall thickness based on 3D printing
  • Processing method of TPMS structure with continuous gradient wall thickness based on 3D printing
  • Processing method of TPMS structure with continuous gradient wall thickness based on 3D printing

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Embodiment

[0031] Step 1, this embodiment takes the Schwarz P minimal surface as an example, such as figure 1 As shown, the initial surface equation is:

[0032] f P (x, y, z) = cos x + cos y + cos z = 0;

[0033] Then take the structure in a 2π×6π×2π cube, namely x∈(-π,π), y∈(-3π,3π), z∈(-π,π), and choose the thickening function T P (x, y, z)=0.1y+1.2, that is, on the basis of the initial curved surface, the amount of thickening will gradually increase along the y direction, and the whole is a curved surface structure with continuous gradient wall thickness and minimal thickness.

[0034] The normal vector is:

[0035]

[0036] The two thickened corresponding point set relational expressions are:

[0037]

[0038]

[0039] The two point sets obtained above are respectively substituted into the Schwarz P minimal surface equation, and the two surface equations of gradient wall thickness can be obtained, respectively:

[0040]

[0041] Step 2, using the point set obtaine...

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Abstract

The invention discloses a processing method of a TPMS structure with continuous gradient wall thickness based on 3D printing, which comprises the following steps of: 1, thickening an initial curved surface to form a curved surface with extremely small continuous gradient wall thickness, and obtaining an equation of a thickened curved surface through a normal vector equation and a relational expression of two thickened corresponding point sets; 2, reconstructing a corresponding minimum curved surface model by utilizing the point set obtained in the step 1, and closing the two thickened curved surfaces to form an integral model; and 3, processing and molding the integral model obtained in the step 2 by using a 3D printing technology. According to the processing method of a TPMS structure with continuous gradient wall thickness based on 3D printing, starting from requirements and technical principles, the invention provides a processing method of a porous structure with an extremely smallcurved surface, which has the advantages of continuous gradient change of wall thickness, wide selection of the curved surface and good control effect, and can solve the problem of difficulty in designing models which need personalized design, modulus, stress and the like and need to be matched everywhere in aerospace, medical implantation and the like at present.

Description

technical field [0001] The invention relates to the fields of porous structure processing and computer-aided manufacturing, in particular to a processing method for a TPMS structure with continuous gradient wall thickness based on 3D printing. Background technique [0002] 3D printing technology is widely used in aerospace, special equipment manufacturing, medical rehabilitation, automotive molds and other industries due to its characteristics of saving raw materials, allowing wide processing shapes, and supporting personalized design. Based on this, the concept of lightweight and personalized design has been widely accepted and paid attention to, and more and more attention has been paid to the design of porous structure, which has excellent characteristics such as impact resistance, sound insulation and heat insulation, adjustable modulus, and smooth circulation. Traditional manufacturing methods are difficult to manufacture most of the current regular porous structures. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/30G06T17/20
CPCG06F30/20G06T17/30G06T17/20
Inventor 唐倩范小杰冯琪翔马帅宋军刘联超李燚苏齐光
Owner CHONGQING UNIV
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