scholarly journals Additive Manufacturing Technologies Used for Processing Polymers: Current Status and Potential Application in Prosthetic Dentistry

2018 ◽  
Vol 28 (2) ◽  
pp. 146-158 ◽  
Author(s):  
Marta Revilla-León ◽  
Mutlu Özcan
Keyword(s):  
Additive Manufacturing ◽  
Potential Application ◽  
Current Status ◽  
Prosthetic Dentistry ◽  
Manufacturing Technologies

Additive Fertigung mikromechatronischer Systeme*/Additive manufacturing of micromechatronic systems - NextFactory: Embedding AM (additive manufacturing) technologies in a hybrid process chain

2017 ◽  
Vol 107 (06) ◽  
pp. 426-431
Author(s):  
O. Refle ◽  
J. Günthel ◽  
M. Burgard ◽  
J. Janhsen ◽  
P. Springer ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Production Technology ◽  
Current Status ◽  
Process Chain ◽  
Mechatronic Systems ◽  
Additive Fertigung ◽  
Preliminary Results ◽  
Technological Developments ◽  
Lot Sizes ◽  
Manufacturing Technologies

Das Projekt „NextFactory“ kombiniert verschiedene Technologien mit dem Ziel, ein neuartiges Produktionsmittel zur Herstellung mikromechatronischer Systeme als funktionale Prototypen oder in kleinsten Stückzahlen zur Verfügung zu stellen. Der Fachartikel gibt einen Überblick zu dem produktionstechnischen Ansatz sowie zur Vision des Projekts und beleuchtet anschließend den aktuellen Projektstand. Zuletzt werden die aktuellen Ergebnisse zusammengefasst und ein Ausblick auf die kommenden Entwicklungsschritte gegeben.   The NextFactory project is based on different technological pillars to innovate the production technology for functional prototypes and small lot sizes of micro-mechatronic systems. This paper presents the vision of the project, followed by a closer look on the current status of the technological developments and concludes with the presentation of preliminary results and an outlook on the next development steps.

Application of biomimicry for sustainable functionalization of textiles: review of current status and prospectus

2019 ◽  
Vol 89 (19-20) ◽  
pp. 4282-4294 ◽  
Author(s):  
DU Weerasinghe ◽  
Srimala Perera ◽  
DGK Dissanayake
Keyword(s):  
Additive Manufacturing ◽  
Textile Industry ◽  
High Performance ◽  
Negative Impact ◽  
Sustainable Manufacturing ◽  
Current Status ◽  
Textile Materials ◽  
Functional Textiles ◽  
Structural Applications ◽  
Manufacturing Technologies

With the increasing complexity of human lifestyles, the demand for functionalized or high-performance textile materials has seen a steep rise. However, the methods of producing thereof are still creating a negative impact on the environment. Although biomimicry is a possible means of catering for this demand, most of the emerging biomimetic technologies follow an unsustainable path, accentuated only on transferring functionalities of nature, by using chemical-intensive applications. Nevertheless, biomimicry holds promise in sustainable manufacturing, if toxic chemical usage can be reduced while structural applications are increased. This study reviews the possibilities of existing and futuristic textile technologies that could facilitate conscious biomimicking of functional textiles, rather than intense application of chemicals. A total of 283 research articles were initially obtained and screened to review the possibilities of combining biomimetic technologies with textile manufacturing technologies. Prospects of innovative textile technologies and additive manufacturing on the futuristic possibilities of structural mimicking of biological functionalities into textile materials are discussed comprehensively. Possible construction methods, including additive manufacturing and weaving in the micro/nano scale, are suggested for structural mimicking. It is also recommended to unfold the potential of biomimicry in producing functional textiles in order to alleviate the harmful impact already caused to the environment by the textile industry.

scholarly journals A STRUCTURED APPROACH TO REDUCE DESIGN ITERATIONS IN ADDITIVE MANUFACTURING

2021 ◽  
Vol 1 ◽  
pp. 231-240
Author(s):  
Laura Wirths ◽  
Matthias Bleckmann ◽  
Kristin Paetzold
Keyword(s):  
Additive Manufacturing ◽  
Spare Parts ◽  
Design Guidelines ◽  
Final Part ◽  
Layer By Layer ◽  
Powder Bed ◽  
Batch Sizes ◽  
Manufacturing Technologies ◽  
Structured Approach ◽  
Design Freedom

AbstractAdditive Manufacturing technologies are based on a layer-by-layer build-up. This offers the possibility to design complex geometries or to integrate functionalities in the part. Nevertheless, limitations given by the manufacturing process apply to the geometric design freedom. These limitations are often unknown due to a lack of knowledge of the cause-effect relationships of the process. Currently, this leads to many iterations until the final part fulfils its functionality. Particularly for small batch sizes, producing the part at the first attempt is very important. In this study, a structured approach to reduce the design iterations is presented. Therefore, the cause-effect relationships are systematically established and analysed in detail. Based on this knowledge, design guidelines can be derived. These guidelines consider process limitations and help to reduce the iterations for the final part production. In order to illustrate the approach, the spare parts production via laser powder bed fusion is used as an example.

scholarly journals Adhesion Studies during Generative Hybridization of Textile-Reinforced Thermoplastic Composites via Additive Manufacturing

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3888
Author(s):  
Johanna Maier ◽  
Christian Vogel ◽  
Tobias Lebelt ◽  
Vinzenz Geske ◽  
Thomas Behnisch ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Polyamide 6 ◽  
Thermoplastic Composites ◽  
Efficient Production ◽  
Angle Measurements ◽  
Small Series ◽  
Contact Angle Measurements ◽  
Static Tensile ◽  
Pre Treatment ◽  
Manufacturing Technologies

Generative hybridization enables the efficient production of lightweight structures by combining classic manufacturing processes with additive manufacturing technologies. This type of functionalization process allows components with high geometric complexity and high mechanical properties to be produced efficiently in small series without the need for additional molds. In this study, hybrid specimens were generated by additively depositing PA6 (polyamide 6) via fused layer modeling (FLM) onto continuous woven fiber GF/PA6 (glass fiber/polyamide 6) flat preforms. Specifically, the effects of surface pre-treatment and process-induced surface interactions were investigated using optical microscopy for contact angle measurements as well as laser profilometry and thermal analytics. The bonding characteristic at the interface was evaluated via quasi-static tensile pull-off tests. Results indicate that both the bond strength and corresponding failure type vary with pre-treatment settings and process parameters during generative hybridization. It is shown that both the base substrate temperature and the FLM nozzle distance have a significant influence on the adhesive tensile strength. In particular, it can be seen that surface activation by plasma can significantly improve the specific adhesion in generative hybridization.

scholarly journals A Review on Additive Manufacturing of Pure Copper

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 740
Author(s):  
Qi Jiang ◽  
Peilei Zhang ◽  
Zhishui Yu ◽  
Haichuan Shi ◽  
Di Wu ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Physical Properties ◽  
Industrial Development ◽  
Pure Copper ◽  
Development Trend ◽  
High Heat ◽  
Current Status ◽  
Selective Electron Beam Melting ◽  
Traditional Processing ◽  
Electrical Components

With the development of the aerospace and automotive industries, high heat exchange efficiency is a challenge facing the development of various industries. Pure copper has excellent mechanical and physical properties, especially high thermal conductivity and electrical conductivity. These excellent properties make pure copper the material of choice for the manufacture of heat exchangers and other electrical components. However, the traditional processing method is difficult to achieve the production of pure copper complex parts, so the production of pure copper parts through additive manufacturing has become a problem that must be overcome in industrial development. In this article, we not only reviewed the current status of research on the structural design and preparation of complex pure copper parts by researchers using selective laser melting (SLM), selective electron beam melting (SEBM) and binder jetting (BJ) in recent years, but also reviewed the forming, physical properties and mechanical aspects of pure copper parts prepared by different additive manufacturing methods. Finally, the development trend of additive manufacturing of pure copper parts is also prospected.

scholarly journals MODEL-BASED DESIGN OF AM COMPONENTS TO ENABLE DECENTRALIZED DIGITAL MANUFACTURING SYSTEMS

2021 ◽  
Vol 1 ◽  
pp. 2127-2136
Author(s):  
Olivia Borgue ◽  
John Stavridis ◽  
Tomas Vannucci ◽  
Panagiotis Stavropoulos ◽  
Harry Bikas ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Systems ◽  
Production Systems ◽  
Data Generation ◽  
Production Networks ◽  
Model Based ◽  
Manufacturing Technologies ◽  
Am Processes ◽  
Final Consumer

AbstractAdditive manufacturing (AM) is a versatile technology that could add flexibility in manufacturing processes, whether implemented alone or along other technologies. This technology enables on-demand production and decentralized production networks, as production facilities can be located around the world to manufacture products closer to the final consumer (decentralized manufacturing). However, the wide adoption of additive manufacturing technologies is hindered by the lack of experience on its implementation, the lack of repeatability among different manufacturers and a lack of integrated production systems. The later, hinders the traceability and quality assurance of printed components and limits the understanding and data generation of the AM processes and parameters. In this article, a design strategy is proposed to integrate the different phases of the development process into a model-based design platform for decentralized manufacturing. This platform is aimed at facilitating data traceability and product repeatability among different AM machines. The strategy is illustrated with a case study where a car steering knuckle is manufactured in three different facilities in Sweden and Italy.

scholarly journals REVIEW OF DESIGN HEURISTICS AND DESIGN PRINCIPLES IN DESIGN FOR ADDITIVE MANUFACTURING

2021 ◽  
Vol 1 ◽  
pp. 2571-2580
Author(s):  
Filip Valjak ◽  
Angelica Lindwall
Keyword(s):  
Additive Manufacturing ◽  
Design Process ◽  
Research Question ◽  
Design Principles ◽  
Current Status ◽  
Design For Additive Manufacturing ◽  
Design Heuristics ◽  
Similarities And Differences ◽  
Definition Of ◽  
Support Methods

AbstractThe advent of additive manufacturing (AM) in recent years have had a significant impact on the design process. Because of new manufacturing technology, a new area of research emerged – Design for Additive Manufacturing (DfAM) with newly developed design support methods and tools. This paper looks into the current status of the field regarding the conceptual design of AM products, with the focus on how literature sources treat design heuristics and design principles in the context of DfAM. To answer the research question, a systematic literature review was conducted. The results are analysed, compared and discussed on three main points: the definition of the design heuristics and the design principles, level of support they provide, as well as where and how they are used inside the design process. The paper highlights the similarities and differences between design heuristics and design principles in the context of DfAM.

scholarly journals Influence of Deposition Patterns on Distortion of H13 Steel by Wire-Arc Additive Manufacturing

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 485
Author(s):  
Xufeng Li ◽  
Jian Lin ◽  
Zhidong Xia ◽  
Yongqiang Zhang ◽  
Hanguang Fu
Keyword(s):  
Additive Manufacturing ◽  
Temperature History ◽  
H13 Steel ◽  
Deposition Patterns ◽  
Field Distortion ◽  
Set Up ◽  
Manufacturing Technologies ◽  
Inherent Strain ◽  
Inherent Strain Method ◽  
Wire Arc Additive Manufacturing

Wire-arc additive manufacturing (WAAM) has been considered as one of the potential additive-manufacturing technologies to fabricate large components. However, its industrial application is still limited by the existence of stress and distortion. During the process of WAAM, the scanning pattern has an important influence on the temperature field, distortion and final quality of the part. Four kinds of deposition patterns, including sequence, symmetry, in–out and out–in, were designed to deposit H13 steel in this study. An in situ measurement system was set up to record the temperature history and the progress of accumulated distortion of the parts during deposition. An S value was proposed to evaluate the distortion of the substrate. It was shown that the distortion of the part deposited by sequence was significantly larger than those of other parts. The distortion deposited by the out–in pattern decreased by 68.6% compared with sequence. The inherent strain method and strain parameter were introduced to expose the mechanism of distortion reduction caused by pattern variation.

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