Journal ArticleDOI
Modeling of bead section profile and overlapping beads with experimental validation for robotic GMAW-based rapid manufacturing
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TLDR
In this article, an experimental study was carried out to determine the optimal model of the bead cross-section profile fitted with circular arc, parabola, and cosine function.Abstract:
Robotic gas metal arc welding enables the capacity of fabricating fully dense components with low cost in rapid manufacturing During the layer additive manufacturing, the cross-sectional profile of a single weld bead as well as overlapping parameters is critical for improving the surface quality, dimensional accuracy and mechanical performance This paper highlights an experimental study carried out to determine the optimal model of the bead cross-section profile fitted with circular arc, parabola, and cosine function, by comparing the actual area of the bead section with the predicted areas of the three models A necessary condition for the overlapping of adjacent beads is proposed The results show that different models for the single bead section profile result in different center distances and surface qualities of adjacent beads The optimal model for the bead section profile has an important bearing on the ratio of wire feed rate to welding speedread more
Citations
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Journal ArticleDOI
Wire-feed additive manufacturing of metal components: technologies, developments and future interests
TL;DR: In this paper, an in depth review of various process aspects of wire-feed additive manufacturing, including quality and accuracy of wirefeed AM processed components, is presented, and the overall objective is to identify the current challenges for wire feed additive manufacturing as well as point out the future research direction.
Journal ArticleDOI
A review of the wire arc additive manufacturing of metals: properties, defects and quality improvement
TL;DR: In this paper, the authors review the emerging research on wire arc additive manufacturing (WAAM) techniques and the commonly used metallic feedstock materials, and also provide a comprehensive over view of the metallurgical and material properties of the deposited parts.
Journal ArticleDOI
A multi-bead overlapping model for robotic wire and arc additive manufacturing (WAAM)
TL;DR: In this paper, the tangent overlapping model (TOM) was proposed to model the geometry of multiple beads overlapping together in a wire and arc additive manufacturing (WAAM) process and the concept of critical centre distance for stable multi-bead overlapping processes was presented.
Journal ArticleDOI
A practical path planning methodology for wire and arc additive manufacturing of thin-walled structures
TL;DR: In this paper, a path planning methodology based on the medial axis transformation (MAT) of the geometry is proposed for wire and arc additive manufacturing of thin-walled structures, which is shown to be particularly beneficial for thin-wall structures.
Journal ArticleDOI
Wire and arc additive manufacturing : Opportunities and challenges to control the quality and accuracy of manufactured parts
TL;DR: In this paper, the authors focus on process planning including build orientation, slicing, and path planning, as well as the definition of process parameter selection from a single track to multi-track and multilayer, and finally geometric features from a thinwall to lattice structures with several case studies.
References
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Journal ArticleDOI
The manufacturing of hard tools from metallic powders by selective laser melting
TL;DR: In this article, a dual laser scanning system in which YAG and CO 2 laser beams are offset a small amount from each other and scanned is proposed to solve the problems of deflection and cracking caused by rapid heating and quenching.
Journal ArticleDOI
Low cost integration of additive and subtractive processes for hybrid layered manufacturing
TL;DR: In this paper, a hybrid layered manufacturing process combining the best features of both additive and subtractive manufacturing is presented, in which the near-net shape of the object is first built using welddeposition; the near net shape is then finish machined subsequently.
Journal ArticleDOI
Weld deposition-based rapid prototyping: a preliminary study
TL;DR: In this article, an integrated and user-friendly environment has been developed to slice the part, plan the deposition parameters, and control the deposition process, including travel speed, touch angle, welding current, and arc voltage, to achieve the required density and three-dimensional geometry.
Journal ArticleDOI
Weld bead modeling and process optimization in Hybrid Layered Manufacturing
TL;DR: The formations of single beads and overlapping multiple beads are modeled and useful not only to predict the bead's shape but also to optimize the three process parameters.
Journal ArticleDOI
Rapid prototyping of metal parts by three-dimensional welding
TL;DR: In this article, a three-dimensional welding has the ability to produce strong, fully dense metal parts in layers, which has enabled the production of parts wider than normal, and has also enabled the use of weld cladding techniques.