Dynamic simulation method for FDM type 3D printing process based on ANSYS

Abstract

The invention provides a dynamic simulation method for a FDM type 3D printing process based on ANSYS, the method comprises the steps of S1, establishing a finite element model module, S2, establishinga wire modal conversion module; S3, establishing a dynamic moving nozzle module to establish a simulation nozzle model for each local coordinate system; S4, establishing a birth-death unit module, and simulating fused deposition of the wire in the 3D printing process; S5, carrying out parameterized dynamic simulation on a temperature field and a thermal stress transfer module, analyzing the quality problem of the formed part through a simulation result cloud chart, and modifying printing parameters to carry out simulation so as to determine an optimal printing mode; and S6, adjusting the parameters of the 3D printer to be in a better printing mode, and performing simulation verification by using FDM type 3D printing dynamic simulation. When the method is used for simulation printing, thesimulation precision is high, and comparative analysis of actual experiments and analysis for improving the quality of formed parts are facilitated.

Description

Technical field: [0001] The invention relates to the thermal coupling field in the forming process of 3D printing technology and the parametric simulation neighborhood of ANSYS software, and belongs to the cross field of thermodynamics, 3D printing and parametric simulation. Specifically, it relates to a dynamic simulation method of FDM type 3D printing process based on ANSYS. Background technique: [0002] Fused deposition modeling technology has become the most vital and fastest-growing technology in today's 3D printing technology because of its high manufacturing efficiency, simple operation and wide application range. The parametric simulation of the 3D printing process has important guiding significance for improving the accuracy of 3D printing molded parts, simplifying the experimental process, and analyzing problems in the printing process. The main performances are as follows: ① Using simulation analysis to replace some repeated basic experiments to reduce experimen...

AI Technical Summary

Problems solved by technology

[0005] However, there is still room for improvement in the dynamic simulation of the 3D printing process established by the parametric language, such as C language, VB language, APDL language, etc.; the platforms that can simulate the 3D printing process include SolidWorks, Unigraphics NX, ANSYS, etc. , there are differences in the implementation complexity and accuracy of different parametric languages ​​in thermodynamics and 3D printing processes

The realization of material accumulation and heat transfer in the dynamic printing process is not comprehensive enough. The lack of thermal analysis of the molded parts formed by deposition and the analysis of the thermal physical property changes of materials at different temperatures lead to problems in the parametric simulation process of molded parts. Insufficient thermal stress analysis, lack of thermal physical properties of materials, and insufficient heat transfer analysis during the molding process have greatly reduced the accuracy of the simulation experiment and the consistency with the actual experiment, reducing the guiding significance of the simulation experiment for the actual experiment. Loss of correctness in terms of molded part quality optimization

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