Process planning based on cylindrical or conical surfaces for five-axis wire and arc additive manufacturing

Dai, Fusheng; Zhang, Haiou; R, Li

doi:10.1108/rpj-01-2020-0001

Cited by 20 publications

(7 citation statements)

References 33 publications

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“…Its structure and path planning are shown in Figure 29. Dai et al [43] proposed an integrated slicing, tool path planning, and welding process planning method and investigated the adaptive CSW model to improve the surface appearances of the welding beads on curved surfaces. e path-planning method and CSW model can be applied in the five-axis fabrication of the prototype of an underwater thruster.…”

Section: Exploration Of Printing Paths For Complex Structuralmentioning

confidence: 99%

A Review of the Development Status of Wire Arc Additive Manufacturing Technology

Chen

Shang

Zhou

et al. 2022

Advances in Materials Science and Engineering

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The WAAM molding process is complex, and the morphology, microstructure, and mechanical properties of the printed parts are affected by multiple factors. In this study, the heat input in the process of WAAM research has made the comprehensive elaboration. The numerical simulation method is used to simulate the molten pool in the process of WAAM, and the force, heat transfer, and velocity of the molten pool are analyzed. Path planning is also an important part of WAAM research, and there are many methods for additive manufacturing path planning, all of which are aimed at improving the dimensional accuracy and performance of the printed parts. Reasonable path planning can also be used for additive components with complex shapes and structures. This study comprehensively expounds on the research on WAAM path planning by scholars in recent years.

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Section: Exploration Of Printing Paths For Complex Structuralmentioning

confidence: 99%

A Review of the Development Status of Wire Arc Additive Manufacturing Technology

Chen

Shang

Zhou

et al. 2022

Advances in Materials Science and Engineering

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“…For curved-layer-based tool-path planning, we merely aim at tool-path generation on a conical surface, which can be flattened onto a flat surface. For better integrity, we first introduce the spatial mapping functions between a conical surface and a flat surface, which can be referred to in the work (Dai et al, 2020), and then Knowing the radius R and the height H of a conical surface, it can be represented by one quadric surface equation as follows:…”

Section: Principal Component Analysis-based Tool-path Planningmentioning

confidence: 99%

“…Five-axis tooling is realized on a five-axis platform, including a two-axis (a tilted axis X axis and a rotating axis Z axis) rotary table and a three-axis machine. The five-axis algorithm was deduced in Dai et al (2020), which computed the transformed points and the rotating angles of the two-axis rotary table according to the orientations. As shown in Figure 14, for a point p oriented in the direction of the overhanging vector u, it is first rotated around the Z axis by an angle of TC and then tilted around the X axis by an angle of TA until u is vertical.…”

Section: Tilt Of Point Orientationmentioning

confidence: 99%

Multiaxis wire and arc additive manufacturing for overhangs based on conical substrates

Dai

Zhang²,

et al. 2021

RPJ

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Purpose This paper aims to present a series of approaches for three-related issues in multiaxis in wire and arc additive manufacturing (WAAM) as follows: how to achieve a stable and robust deposition process and maintain uniform growth of the part; how to maintain consistent formation of a melt pool on the surface of the workpiece; and how to fabricate an overhanging structure without supports. Design/methodology/approach The principal component analysis-based path planning approach is proposed to compute the best scanning directions of slicing contours for the generation of filling paths, including zigzag paths and parallel skeleton paths. These printing paths have been experimented with in WAAM. To maintain consistent formation of a melt pool at overhanging regions, the authors introduce definitions for the overhanging point, overhanging distance and overhanging vector, with which the authors can compute and optimize the multiaxis motion. A novel fabricating strategy of depositing the overhanging segments as a support for the deposition of filling paths is presented. Findings The second principal component of a planar contour is a reasonable scanning direction to generate zigzag filling paths and parallel skeleton filling paths. The overhanging regions of a printing layer can be supported by pre-deposition of overhanging segments. Large overhangs can be successfully fabricated by the multiaxis WAAM process without supporting structures. Originality/value An intelligent approach of generating zigzag printing paths and parallel skeleton printing paths. Optimizations of depositing zigzag paths and parallel skeleton paths. Applications of overhanging point overhanging distance and overhanging vector for multiaxis motion planning. A novel fabricating strategy of depositing the overhanging segments as a support for the deposition of filling paths.

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“…laser-based AM and arc-based AM. In this field, wire and arc additive manufacturing (WAAM) using an electric arc as the heat source and metal wire as the feedstock has been applied to manufacture metallic components [25], and a series of related models have been developed to improve the accuracy of prepared components [26][27][28]. Laser-based AM using the laser as the heat source and the powder as the feedstock, and it gives better resolution and surface finish compared with WAAM [29].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Phase Transformation Temperature of NiTiNb Shape Memory Alloy Prepared by Laser Solid Forming Using Mixed Powder

Yang

et al. 2022

Applied Sciences

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NiTiNb is a wide-hysteresis shape memory alloy. The Laser Solid Forming (LSF) technology can overcome the shortcomings of the traditional long cycle processing to prepare NiTiNb. In this work, we studied the microstructure and phase transformation temperature of the NiTiNb prepared by LSF., in which the Ni + Ti + Nb mixed powder was melted under different laser power P, scanning speed v, layer thickness t, and energy density EV. The results show that the combination of LSF process parameters with P = 2000 W and v = 900 mm/min can obtain a good metallurgical bond. As the laser power increases, the grain size increases, and the proportion of equiaxed crystals increases, the martensite transformation temperature increases. The inhomogeneity of the LSF-NiTiNb microstructure results in different phase transformation temperatures even in the same sample. The subsequent heat treatment at 850 °C for 3 h increases the phase transformation temperature and hysteresis of LSF-NiTiNb. The tensile properties of the LSF-NiTiNb samples with different building heights are significantly different. The maximum elongation reaches 8% and the minimum elongation is only 0.8%. The LSF parameter combination in this work has reference value for the parameter selection of subsequent preparation of NiTiNb.

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Process planning based on cylindrical or conical surfaces for five-axis wire and arc additive manufacturing

Cited by 20 publications

References 33 publications

A Review of the Development Status of Wire Arc Additive Manufacturing Technology

A Review of the Development Status of Wire Arc Additive Manufacturing Technology

Multiaxis wire and arc additive manufacturing for overhangs based on conical substrates

Microstructure and Phase Transformation Temperature of NiTiNb Shape Memory Alloy Prepared by Laser Solid Forming Using Mixed Powder

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