Laser 3D printing finite element simulation method

A technology of 3D printing and simulation method, which is applied in the field of finite element simulation of laser 3D printing, which can solve the problem of not fully reflecting the single-layer multi-channel thermal effect of laser printing.

Inactive Publication Date: 2018-08-14
DALIAN JIAOTONG UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the finite element method currently used by researchers to simulate the laser 3D printing process is limited to the analysis of the change process of the temperature field of the single-pass deposition layer, which cannot fully reflect the thermal effect of laser printing single-layer multi-pass and multi-layer multi-pass

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  • Laser 3D printing finite element simulation method
  • Laser 3D printing finite element simulation method
  • Laser 3D printing finite element simulation method

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Embodiment Construction

[0025] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] It should be noted that, in the following specific embodiments, when describing the embodiments of the present invention in detail, in order to clearly show the structure of the present invention for the convenience of description, the structures in the drawings are not drawn according to the general scale, and are drawn Partial magnification, deformation and simplification are included, therefore, it should be avoided to be interpreted as a limitation of the present invention.

[0027] This embodiment takes the simulated coaxial powder feeding metal laser 3D printing technology as an example. For the actual coaxial powder feeding laser 3D printing device, please refer to figure 1 In the figure, 1 is a vacuum glove box, 2 is a laser cladding head, 3 is a laser beam, 4 is a metal powder, 5 is a component, 6 is a substrate, 7 i...

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Abstract

The invention discloses a laser 3D printing finite element simulation method. The method includes: establishing a three-dimensional geometrical model with a substrate area and stack layer areas, wherein the stack layer areas comprise one or more layer structures sequentially stacked on the substrate layer, and the layer structures are formed by line structures representing printing routes; respectively setting material parameters for the substrate area and the stack layer areas to enable the substrate area and the stack layer areas to obtain physical properties of corresponding materials; setting temperature and heat radiating surfaces of the substrate layer, and setting contact surfaces of the substrate area and the stack layer areas or contact surfaces of the stack layer areas as convection and radiation surfaces; dividing the line structures into a plurality of analysis step structures, adopting a birth-death element setting method to sequentially activate each analysis step structure according to the printing routes, sequentially performing analogue simulation, and correcting parameters according to simulation results, so that reference and theoretical support is provided for parameter setting in practical laser 3D printing.

Description

technical field [0001] The invention relates to the field of finite element simulation of additive manufacturing, and more specifically, to a finite element simulation method for laser 3D printing. Background technique [0002] Metal laser 3D printing (3D Printing) technology, also known as metal additive manufacturing (Additive Manufacturing, AM) technology, is based on a CAD three-dimensional digital model and integrates laser science, materials science, computer science, mechanical design and control. It is a new type of material forming process to manufacture metal parts in the way of "layered manufacturing, layer by layer superposition" by adding powdery, filamentous or flake materials. The main technology types include coaxial powder-feeding metal laser 3D printing technology, pre-powder sintering metal laser 3D printing technology, and wire-feeding metal laser 3D printing technology. Among them, the coaxial powder-feeding metal laser 3D printing technology has broad ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50B22F3/105B33Y50/02
CPCB33Y50/02G06F2119/08G06F2119/06G06F30/23B22F10/00B22F12/10B22F10/25B22F10/80Y02P10/25
Inventor 陆兴安晓龙吕云卓覃作祥
Owner DALIAN JIAOTONG UNIVERSITY
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