Abstract
To improve the accuracy of the Fused Deposition Modeling (FDM) color 3D printer in printing color pieces, the vibration characteristics were studied. Firstly, the models of the FDM color 3D printer were qualitatively simplified by mechanics theory to provide theoretical support for dynamic characteristics of the structure, and the finite element modal analysis was performed by the ANSYS (It is an engineering simulation and 3D design software) Workbench to obtain the natural frequency and mode shape displacement of the FDM color 3D printer. Then, the power spectrum of the vibration signal of the previous FDM color 3D printer was measured through frequency domain analysis, and the resonance positions of the 3D printer were obtained by comparing the finite element analysis with experimental analysis. Finally, the design of the color 3D printer was optimized based on the analysis. The results indicate that the optimized scheme can effectively improve the resonance characteristics of the device and reduce the overall modal displacement. The actual experiment of the 3D printer demonstrates that the accuracy of the optimized device has been improved, which has crucial reference significance for the development of the FDM color 3D printer.
Highlights
With the rapid development of 3D printing technology, the application of 3D printing technology is increasingly extensive [1,2,3]
In order to analyze by modal analysis, including the natural frequency of the color 3D printer, the modal mode, and the the cause of the vibration, it is crucial to obtain the natural frequency of the color 3D printer by modal displacement generated by vibration
The natural frequencies and modes of the top six orders, which were obtained structure of the color 3D printer could be found according to modal analysis
Summary
With the rapid development of 3D printing technology, the application of 3D printing technology is increasingly extensive [1,2,3]. Due to the demand for individuation, color 3D printing technology has developed rapidly recently [4,5]. For the FDM 3D printer, the mode of multi-nozzle cooperative work is mainly used for color printing, which will lead to a series of problems [6,7]. The accuracy of the 3D printer has always been its problem and limits its development to a certain extent due to its unique printing mode [8,9,10], especially when color products are printed, accuracy deviations are detected due to the existence of color boundaries, so the FDM color 3D printer requires higher accuracy [11]. The vibration characteristic of the nozzle is one of key factors that affect the printing accuracy. If the vibration frequency is close to the natural frequency of
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