Near support-free multi-directional 3D printing via global-optimal decomposition

Gao, Yisong; Wu, Lifang; Yan, Dong‐Ming; Nan, Liangliang

doi:10.1016/j.gmod.2019.101034

Cited by 33 publications

(14 citation statements)

References 23 publications

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“…All the above works assume fabrication with conventional 3D printers that have 3 degrees of freedom (DOFs), i.e., translation along X, Y, and Z axes. In contrast, some researchers attempted to decompose a 3D shape into (near) support-free parts for 5-DOF 3D printing such that each part can be 3D printed on top of the fabricated parts with a carefully chosen orientation (i.e., the additional 2 DOFs) [GWYN19]. To ensure printability, the extruder should not collide with the printed parts or the printing bed during the fabrication process.…”

Section: Shape Decomposition For Support-free 3d Printingmentioning

confidence: 99%

State of the Art on Computational Design of Assemblies with Rigid Parts

Wang

Song

Pauly

2021

Computer Graphics Forum

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An assembly refers to a collection of parts joined together to achieve a specific form and/or functionality. Designing assemblies is a non-trivial task as a slight local modification on a part's geometry or its joining method could have a global impact on the structural and/or functional performance of the whole assembly. Assemblies can be classified as structures that transmit force to carry loads and mechanisms that transfer motion and force to perform mechanical work. In this state-of-the-art report, we focus on computational design of structures with rigid parts, which generally can be formulated as a geometric modeling and optimization problem. We broadly classify existing computational design approaches, mainly from the computer graphics community, according to high-level design objectives, including fabricability, structural stability, reconfigurability, and tileability. Computational analysis of various aspects of assemblies is an integral component in these design approaches. We review different classes of computational analysis and design methods, discuss their strengths and limitations, make connections among them, and propose possible directions for future research.

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Section: Shape Decomposition For Support-free 3d Printingmentioning

confidence: 99%

State of the Art on Computational Design of Assemblies with Rigid Parts

Wang

Song

Pauly

2021

Computer Graphics Forum

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“…Furthermore, removing the supports may damage the printed objects [20]. Recently, multi-axis 3D printing systems have been developed to reduce the need for support structures [21][22][23]. However, adding degrees of freedom to a 3D printing system makes it challenging to define slicing and avoid collision during printing, and increases the complexity and cost.…”

Section: Introductionmentioning

confidence: 99%

Self-healing materials enable free-standing seamless large-scale 3D printing

et al. 2021

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Three-dimensional (3D) printing has had a large impact on various fields, with fused deposition modeling (FDM) being the most versatile and cost-effective 3D printing technology. However, FDM often requires sacrificial support structures, which significantly complicates the processing and increase the cost. Furthermore, poor layer-to-layer adhesion greatly affects the mechanical stability of 3D-printed objects. Here, we present a new Print-Healing strategy to address the aforementioned challenges. A polymer ink (Cu-DOU-CPU) with synergetic triple dynamic bonds was developed to have excellent printability and room-temperature self-healing ability. Objects with various shapes were printed using a simple compact 3D printer, and readily assembled into large sophisticated architectures via self-healing. Triple dynamic bonds induce strong binding between layers. Additionally, damaged printed objects can spontaneously heal, which significantly elongates their service life. This work paves a simple and powerful way to solve the key bottlenecks in FDM 3D printing, and will have diverse applications.

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“…Wang et al (2019) presented a dynamic slicing algorithm that achieves a non-supporting structure with a five-axis platform by performing model skeleton extraction. Wu et al (2017Wu et al ( , 2019, Gao et al (2019) and Xu et al (2019a) use several planes to partition the model and each part is built along a fixed direction on a multi-DOF platform. Gao et al (2019) obtained fewer parts via global optimization.…”

Section: Introductionmentioning

confidence: 99%

“…Wu et al (2017Wu et al ( , 2019, Gao et al (2019) and Xu et al (2019a) use several planes to partition the model and each part is built along a fixed direction on a multi-DOF platform. Gao et al (2019) obtained fewer parts via global optimization.…”

Section: Introductionmentioning

confidence: 99%

“…A selfsupporting threshold angle is usually set to 45°, e.g. as in (Gao et al, 2019), which is relatively large and may not be suitable for metal materials; for example, stainless steel may exhibit undesirable behavior at 60°in the arc welding additive process. Therefore, although metal material is self-supporting, it is not as good as plastic material.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on GMAW based non-supporting thin-wall structure manufacturing

Liu

Shen

Deng

et al. 2020

RPJ

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Purpose Additive manufacturing based on arc welding is a fast and effective way to fabricate complex and irregular metal workpieces. Thin-wall metal structures are widely used in the industry. However, it is difficult to realize support-free freeform thin-wall structures. This paper aims to propose a new method of non-supporting thin-wall structure (NSTWS) manufacturing by gas metal arc welding (GMAW) with the help of a multi-degree of freedom robot arm. Design/methodology/approach This study uses the geodesic distance on the triangular mesh to build a scalar field, and then the equidistant iso-polylines are obtained, which are used as welding paths for thin-wall structures. Focusing on the possible problems of interference and the violent variation of the printing directions, this paper proposes two types of methods to partition the model mesh and generate new printable iso-polylines on the split meshes. Findings It is found that irregular thin-wall models such as an elbow, a vase or a transition structure can be deposited without any support and with a good surface quality after applying the methods. Originality/value The experiments producing irregular models illustrate the feasibility and effectiveness of the methods to fabricate NSTWSs, which could provide guidance to some industrial applications.

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Near support-free multi-directional 3D printing via global-optimal decomposition

Cited by 33 publications

References 23 publications

State of the Art on Computational Design of Assemblies with Rigid Parts

State of the Art on Computational Design of Assemblies with Rigid Parts

Self-healing materials enable free-standing seamless large-scale 3D printing

Research on GMAW based non-supporting thin-wall structure manufacturing

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