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Method for obtaining structural design parameters

A technology of structural design and parameters, applied in processing data acquisition/processing, improvement of process efficiency, additive manufacturing, etc., can solve problems such as inaccuracy, and achieve the effect of simple operation and implementation

Inactive Publication Date: 2017-05-17
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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Problems solved by technology

[0005] At present, the judging method of the maximum length of the overhanging structure that can be printed in the air in all processes of 3D printing technology is formulated according to the equipment manufacturer’s own processing experience. No matter what kind of material, it is often a simple empirical value, such as the EOS company’s When the equipment prints metal materials, no matter what kind of material, the maximum inclination angle is not more than 30°, and the printing size of the suspension is 2mm, etc., but when it is actually printed, this value is often inaccurate

Method used

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  • Method for obtaining structural design parameters
  • Method for obtaining structural design parameters

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with embodiment.

[0033] Use EOS M280 equipment to carry out selective laser melting (SLM) printing on titanium alloy materials, and judge the maximum machinable suspended structure length of its overhanging structure. It is known that the thickness of each layer of titanium alloy processing is set to be 40 μm, and the printing Proceed as follows:

[0034] (1) Design a series of arch structures with different size gradients, and then use titanium alloy powder materials to perform SLM printing on the above series of arch structures (such as figure 2 shown);

[0035] (2) After the printing is completed, test the collapse degree of arch structures of various sizes, and obtain the critical collapse angle (maximum inclination angle) of 85°C;

[0036] (3) combine figure 1 The geometric relationship of each parameter in , through calculation, it can be seen that the maximum self-weight bearing length of ...

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Abstract

The invention relates to a method for obtaining structural design parameters in the layer-by-layer manufacturing process. The method for obtaining the structural design parameters comprises the following steps that firstly, an arc structure with the radius greater than the critical collapse radius is manufactured layer by layer until a dangling structure collapses; and secondly, the collapsing position is observed, and the included angle alpha 0 between the line connecting the collapsing position and the circle center of the arc structure and the horizontal direction is obtained, wherein the critical collapse radius is the maximum radius of the arc structure before the collapse occurs when the arc structure is printed. According to the method for obtaining the structural design parameters in the layer-by-layer manufacturing process, operation and implementation are easy, and the maximum dangling structure capable of being printed without a support can be effectively calculated and verified through the printed arc structure. Through the method, a series of design standards and support additional arranging standards can be set, so that the blank of design standards for the 3D printing process can be filled.

Description

technical field [0001] The invention belongs to the fields of performance detection of materials, manufacture and design of three-dimensional products, and specifically relates to a method for obtaining structural design parameters. Background technique [0002] Layer-by-layer manufacturing technology is a widely used technology. Among them, 3D printing technology is a kind of rapid prototyping technology. It is based on a three-dimensional model and uses metal powder or plastic. , A technology that constructs three-dimensional three-dimensional parts by stacking layers. This technology combines various disciplines such as CAD / CAM, optics, numerical control and material science, and has a wide range of applications. It has application prospects in jewelry, medical care, footwear, industrial design, architecture, aerospace, automobiles, education, etc. [0003] 3D printing is mainly divided into fused deposition rapid prototyping (FDM), stereolithography (SLA), selective las...

Claims

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Application Information

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IPC IPC(8): B29C64/10B29C64/386B22F3/105B22F3/115B33Y50/00
CPCB22F3/115B33Y50/00B22F10/00B22F10/12B22F10/18B22F10/28Y02P10/25B22F10/20
Inventor 曹玄扬周朝辉李晓庚
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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