Volume decomposition for multi-axis support-free and gouging-free printing based on ellipsoidal slicing

Xie, Fubao; Jing, Xishuang; Zhang, Chengyang; Chen, Siyu; Bi, Danjie; Li, Zhaoyu; He, Dong; Tang, Kai

doi:10.1016/j.cad.2021.103135

Cited by 20 publications

(5 citation statements)

References 25 publications

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“…Γ-Shape model shown in Figure 15) that are sliced by different methods (e.g. the ellipsoidal slicing method for curved layer printing (Xie et al , 2022) and the model segmentation method for 3 + 2-axis printing (Wu et al , 2017)). The model segmentation method for 3 + 2-axis printing is to divide the model into independent unsupported segments and then divide each segment into a group of parallel plane layers.…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…The height of the twist model is about 115 mm. It should be mentioned that the used slicing method is the so-called ellipsoidal slicing method (Xie et al, 2022), meaning that each layer is a part of the ellipsoid. As such, during the printing process, the nozzle orientation will be changed continuously, which can directly show the flexibility The printing parameter of the twist part is the same as those of the printing of the S-shape model.…”

Section: Curved Layer Printingmentioning

confidence: 99%

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A robotic 3D printing system for supporting-free manufacturing of complex model based on FDM technology

Jing

Xie

et al. 2022

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Purpose 3D printing technology has the characteristics of fast forming and low cost and can manufacture parts with complex structures. At present, it has been widely used in various manufacturing fields. However, traditional 3-axis printing has limitations of the support structure and step effect due to its low degree of freedom. The purpose of this paper is to propose a robotic 3D printing system that can realize support-free printing of parts with complex structures. Design/methodology/approach A robotic 3D printing system consisting of a 6-degrees of freedom robotic manipulator with a material extrusion system is proposed for multi-axis additive manufacturing applications. And the authors propose an approximation method for the extrusion value E based on the accumulated arc length of the already printed points, which is used to realize the synchronous movement between multiple systems. Compared with the traditional 3-axis printing system, the proposed robotic 3D printing system can provide greater flexibility when printing complex structures and even realize curved layer printing. Findings Two printing experiments show that compared with traditional 3D printing, a multi-axis 3D printing system saves 47% and 79% of materials, respectively, and the mechanical properties of curved layer printing using a multi-axis 3D printing system are also better than that of 3-axis printing. Originality/value This paper shows a simple and effective method to realize the synchronous movement between multiple systems so as to develop a robotic 3D printing system that can realize support-free printing and verifies the feasibility of the system through experiments.

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Section: Experiments and Resultsmentioning

confidence: 99%

Section: Curved Layer Printingmentioning

confidence: 99%

A robotic 3D printing system for supporting-free manufacturing of complex model based on FDM technology

Jing

Xie

et al. 2022

Self Cite

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“…For instance, the skeleton can be obtained by mesh contraction [1]. Similarly to the centroid axis algorithm, the medial axis can be used to identify the slicing direction for non-uniform planar slicing [21] (Figure 4c) or non-uniform and non-planar slicing [24]. However, this strategy is mainly oriented to tree-like structures.…”

Section: State Of the Artmentioning

confidence: 99%

Non-Uniform Planar Slicing for Robot-Based Additive Manufacturing

Lettori¹,

Raffaeli²,

Borsato³

et al. 2023

Cad'23

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Planar slicing algorithms with constant layer thickness are widely implemented for geometry processing in Additive Manufacturing (AM). Since the build direction is fixed, a staircase effect is produced, decreasing the final surface finish. Also, support structures are required for overhanging portions. To overcome such limits, AM is combined with manipulators and working tables with multiple degrees of freedom. This is called Robot-Based Additive Manufacturing (RBAM) and it aims to increase the manufacturing flexibility of traditional printers, enabling the deposition of material in multiple directions. In particular, the deposition direction is changed at each layer requiring non-uniform thickness slicing. The total number of layers, as well as the volume of the support structures and the manufacturing time are reduced, while the surface finish and mechanical performance of the final product are increased. This paper presents an algorithm for non-uniform planar slicing developed in Rhinoceros and Grasshopper. It processes the input geometry and uses parameters to capture manufacturing limits. It mostly targets curved geometries to remove the need for support structures, also increasing the part quality.

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“…The MA is a powerful tool as it gives useful topological information of a given part, such as the thickness at each shape point [101]. As the centroidal axis, MA can help in identifying the slicing directions [109,110] in case of curved slicing [109] or adaptive slicing [111] (see the following section for details). Also, MA can be used to generate discrete sub-volumes [27,100].…”

Section: Continuously Varied Direction Of Depositionmentioning

confidence: 99%

A review of geometry representation and processing methods for cartesian and multiaxial robot-based additive manufacturing

Lettori

Raffaeli

Bilancia

et al. 2022

Int J Adv Manuf Technol

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Nowadays, robot-based additive manufacturing (RBAM) is emerging as a potential solution to increase manufacturing flexibility. Such technology allows to change the orientation of the material deposition unit during printing, making it possible to fabricate complex parts with optimized material distribution. In this context, the representation of parts geometries and their subsequent processing become aspects of primary importance. In particular, part orientation, multiaxial deposition, slicing, and infill strategies must be properly evaluated so as to obtain satisfactory outputs and avoid printing failures. Some advanced features can be found in commercial slicing software (e.g., adaptive slicing, advanced path strategies, and nonplanar slicing), although the procedure may result excessively constrained due to the limited number of available options. Several approaches and algorithms have been proposed for each phase and their combination must be determined accurately to achieve the best results. This paper reviews the state-of-the-art works addressing the primary methods for the representation of geometries and the subsequent geometry processing for RBAM. For each category, tools and software found in the literature and commercially available are discussed. Comparison tables are then reported to assist in the selection of the most appropriate approaches. The presented review can be helpful for designers, researchers and practitioners to identify possible future directions and open issues.

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Volume decomposition for multi-axis support-free and gouging-free printing based on ellipsoidal slicing

Cited by 20 publications

References 25 publications

A robotic 3D printing system for supporting-free manufacturing of complex model based on FDM technology

A robotic 3D printing system for supporting-free manufacturing of complex model based on FDM technology

Non-Uniform Planar Slicing for Robot-Based Additive Manufacturing

A review of geometry representation and processing methods for cartesian and multiaxial robot-based additive manufacturing

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