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Printing path generation method, computer equipment and storage medium

A technology of printing path and reference direction, which is applied in the field of additive manufacturing, can solve the problems of restricting the development of FFF process, the manufacture of difficult structural parts and bearing parts of FFF process, etc., and achieve the effect of improving practical performance, enhancing directional strength and strengthening strength

Pending Publication Date: 2022-07-12
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of these influencing factors makes it difficult for the FFF process to be directly used in the manufacture of structural parts and bearing parts, thus restricting the further development of the FFF process.

Method used

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  • Printing path generation method, computer equipment and storage medium
  • Printing path generation method, computer equipment and storage medium
  • Printing path generation method, computer equipment and storage medium

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Experimental program
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Embodiment Construction

[0024] Preferred embodiments of the present invention are described in detail as follows in conjunction with the accompanying drawings:

[0025] figure 1 It is a schematic flowchart of a method for generating a printing path in an embodiment, as shown in the figure, the steps are as follows:

[0026] S1: Obtain the STL model, layer height and stress tensor of element nodes calculated by finite element;

[0027] S2: According to the STL model and layer thickness, slice the 3D model to obtain the 2D slice plane;

[0028] S3: Triangulate the 2D tangent plane to divide the 2D tangent plane into multiple triangular patches;

[0029] S4: According to the stress tensor of the element node calculated by the finite element, after obtaining the stress tensor of the triangular facet node in the 2D tangent plane, obtain the resultant stress tensor of the triangular facet to obtain the resultant principal stress of the resultant stress tensor The magnitude of the field and the direction...

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Abstract

The invention provides a printing path generation method which comprises the following steps: S3, triangularly dividing a 2D tangent plane to divide the 2D tangent plane into a plurality of triangular patches; s4, according to the stress tensor of the unit node calculated by the finite element, after the stress tensor of the triangular patch node in the 2D tangent plane is obtained, the combined stress tensor of the triangular patch is obtained, so that the size and the direction of a combined principal stress field of the combined stress tensor are obtained, and the combined principal stress field of the triangular patch is obtained; and S5, after the triangular patches are clustered to generate partition contours, the combined principal stress field direction of each partition is obtained according to the combined principal stress field of the triangular patches, so that the filling direction of each partition is determined, and a printing path is generated. According to the printing path generation method, the calculator equipment and the storage medium, the strength of the FFF process printing piece can be remarkably enhanced, and the practical performance of the whole process is improved.

Description

technical field [0001] The invention is mainly applied to the field of additive manufacturing, and particularly relates to a method for generating a printing path, a computer device and a storage medium. Background technique [0002] Fused filament manufacturing (Fused Filament Fabrication, FFF) has become the most widely used processing technology in Additive Manufacturing (AM) technology because of its cheap equipment, convenient handling, and low production and cost of printing materials. It is mainly heated by the printing nozzle, and the polymer filament is fed into the nozzle through the roller, and then printed by accumulating layer by layer. [0003] The strength of workpieces manufactured by the FFF process is affected by many process parameters and path planning factors, such as layer thickness, nozzle diameter, filling spacing, printing temperature, printing speed, different polymer materials, material extrusion rate, filling strategy, etc. . The existence of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/386B29C64/118B33Y50/00
CPCB29C64/386B29C64/118B33Y50/00Y02P10/25
Inventor 姚远张航马英鑫
Owner SHANGHAI UNIV