Strength Increasing Additive Manufacturing Fused Filament Fabrication Technology, Based on Spiral Toolpath Material Deposition

Avdeev, Artem; Shvets, Andrey; Gushchin, I. A.; Torubarov, I. S.; Drobotov, Aleksey; Makarov, A. M.; Plotnikov, A. L.; Serdobintsev, Yu. P.

doi:10.3390/machines7030057

Cited by 19 publications

(8 citation statements)

References 23 publications

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“…Thus, the utilization of computational algorithms to find this desired orientation is crucial to the FDM process. Besides, Avdeev et al [44] create a cylinder inside any given geometry and deposit a spiral toolpath upon the cylinder surface to increase the strength of the build. Some other studies on optimization on the deposition toolpath improve the product qualities [27,28].…”

Section: Strategies For Enhancing Mechanical Strengthmentioning

confidence: 99%

Strength Enhancement in Fused Filament Fabrication via the Isotropy Toolpath

2021

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The fused filament fabrication (FFF) process deposits thermoplastic material in a layer-by-layer manner, expanding the design space and manufacturing capability compared with traditional manufacturing. However, the FFF process is inherently directional as the material is deposited in a layer-wise manner. Therefore, the in-plane material cannot reach the isotropy character when performing the tensile test. This would cause the strength of the print components to vary based on the different process planning selections (building orientation, toolpath pattern). The existing toolpaths, primarily used in the FFF process, are linear, zigzag, and contour toolpaths, which always accumulate long filaments and are unidirectional. Thus, this would create difficulties in improving the mechanical strength from the existing toolpath strategies due to the material in-plane anisotropy. In this paper, an in-plane isotropy toolpath pattern is generated to enhance the mechanical strength in the FFF process. The in-plane isotropy can be achieved through continuous deposition while maintaining randomized distribution within a layer. By analyzing the tensile strength on the specimens made by traditional in-plane anisotropy toolpath and the proposed in-plane isotropy toolpath, our results suggest that the mechanical strength can be reinforced by at least 20% using our proposed toolpath strategy in extrusion-based additive manufacturing.

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Section: Strategies For Enhancing Mechanical Strengthmentioning

confidence: 99%

Strength Enhancement in Fused Filament Fabrication via the Isotropy Toolpath

2021

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“…When selecting one of the additive manufacturing processes, it is necessary to take into account different criteria, such as the functional role of the future part [5][6][7][8][9][10][11], the nature of the material from which the part will be made, the physical and mechanical properties of the part material [12][13][14][15][16][17][18][19], the performance of the 3D-printing process [11,20], the accuracy and roughness of the surfaces obtained, and last but not least, the cost of manufacturing the part [7,21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Ability to Accurately Produce Angular Details by 3D Printing of Plastic Parts

et al. 2021

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3D printing is a process that has become widely used in recent years, allowing the production of parts with relatively complicated shapes from metallic and non-metallic materials. In some cases, it is challenging to evaluate the ability of 3D printers to make fine details of parts. For such an assessment, the printing of samples showing intersections of surfaces with low angle values was considered. An experimental plan was designed and materialized to highlight the influence of different factors, such as the thickness of the deposited material layer, the printing speed, the cooling and filling conditions of the 3D-printed part, and the thickness of the sample. Samples using areas in the form of isosceles triangles with constant height or bases with the same length, respectively, were used. The mathematical processing of the experimental results allowed the determination of empirical mathematical models of the power-function type. It allowed the detection of both the direction of actions and the intensity of the influence exerted by the input factors. It is concluded that the strongest influence on the printer’s ability to produce fine detail, from the point of view addressed in the paper, is exerted by the vertex angle, whose reduction leads to a decrease in printing accuracy.

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“…In the CLFDM process, the filament is deposited along curved paths adapted to the contours of the parts instead of planar paths (Chakraborty et al, 2008). Thus, the fabricated parts with better structure and strength are realized (Avdeev et al, 2019;Lee et al, 2007). For a 3D model with both an inclined surface and a curved surface, as shown in Figure 1(a), it is almost impossible to achieve an accurate and smooth surface under traditional flat layer-based deposition because of the staircase effect, as shown in Figure 1(b).…”

Section: Introductionmentioning

confidence: 99%

“…Because of the discontinuous filament, the mechanical strength of the model in Figure 1(d) is also weak. Based on spiral toolpath material deposition, the produced fused filament fabrication technology parts show more uniform strength characteristics in different directions, especially the bending strength and compressive strength (Avdeev et al, 2019). Therefore, reasonable slicing and printing process are critical to the printed parts.…”

Section: Introductionmentioning

confidence: 99%

A multi-DOF rotary 3D printer: machine design, performance analysis and process planning of curved layer fused deposition modeling (CLFDM)

Zhao

Shen

et al. 2020

RPJ

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Purpose The purpose of this paper is to design and develop a rotary three-dimensional (3D) printer for curved layer fused deposition modeling (CLFDM), and discuss some technical challenges in the development. Design/methodology/approach Some technical challenges include, but are not limited to, the machine design and control system, motion analysis and simulation, workspace and printing process analysis, curved layer slicing and tool path planning. Moreover, preliminary experiments are carried out to prove the feasibility of the design. Findings A rotary 3D printer for CLFDM has been designed and developed. Moreover, this printer can function as a polar 3D printer for flat layer additive manufacturing (AM). Compared with flat layer AM, CLFDM weakens the staircase effect and improves geometrical accuracy and mechanical properties. Hence, CLFDM is more suitable for parts with curved surfaces. Research limitations/implications Double extruders have brought improved build speed. However, this paper is restricted to complex process planning and mechanical structures, which may lead to collisions during printing. Meanwhile, the rotation range of the nozzle is limited by mechanical structures, affecting the manufacturing capability of complex curved surfaces. Originality/value A novel rotary 3D printer, which has four degrees of freedom and double extruders, has been designed and manufactured. The investigation on the prototype has proved its capability of CLFDM. Besides, this rotary 3D printer has two working modes, which brings the possibility of flat layer AM and CLFDM.

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Strength Increasing Additive Manufacturing Fused Filament Fabrication Technology, Based on Spiral Toolpath Material Deposition

Cited by 19 publications

References 23 publications

Strength Enhancement in Fused Filament Fabrication via the Isotropy Toolpath

Strength Enhancement in Fused Filament Fabrication via the Isotropy Toolpath

Evaluation of the Ability to Accurately Produce Angular Details by 3D Printing of Plastic Parts

A multi-DOF rotary 3D printer: machine design, performance analysis and process planning of curved layer fused deposition modeling (CLFDM)

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