Hasil untuk "Manufactures"

B. Derby

L. Murr, S. Quinones, S. Gaytan et al.

A. D. Jayal, F. Badurdeen, O. Dillon et al.

Y. Ju-Nam, J. Lead

H. Wiendahl, H. Elmaraghy, P. Nyhuis et al.

D. Flower, J. Sanjayan

J. Naman, D. Slevin

W. Bilkey, G. Tesar

Samuel H. Huang, J. Dismukes, J. Shi et al.

F. Fang, X. D. Zhang, A. Weckenmann et al.

Qinghua Zhu, Joseph Sarkis

F. Tao, Ying Cheng, Lida Xu et al.

A. T. Sidambe

Titanium (Ti) and its alloys may be processed via advanced powder manufacturing routes such as additive layer manufacturing (or 3D printing) or metal injection moulding. This field is receiving increased attention from various manufacturing sectors including the medical devices sector. It is possible that advanced manufacturing techniques could replace the machining or casting of metal alloys in the manufacture of devices because of associated advantages that include design flexibility, reduced processing costs, reduced waste, and the opportunity to more easily manufacture complex or custom-shaped implants. The emerging advanced manufacturing approaches of metal injection moulding and additive layer manufacturing are receiving particular attention from the implant fabrication industry because they could overcome some of the difficulties associated with traditional implant fabrication techniques such as titanium casting. Using advanced manufacturing, it is also possible to produce more complex porous structures with improved mechanical performance, potentially matching the modulus of elasticity of local bone. While the economic and engineering potential of advanced manufacturing for the manufacture of musculo-skeletal implants is therefore clear, the impact on the biocompatibility of the materials has been less investigated. In this review, the capabilities of advanced powder manufacturing routes in producing components that are suitable for biomedical implant applications are assessed with emphasis placed on surface finishes and porous structures. Given that biocompatibility and host bone response are critical determinants of clinical performance, published studies of in vitro and in vivo research have been considered carefully. The review concludes with a future outlook on advanced Ti production for biomedical implants using powder metallurgy.

Lai‐Chang Zhang, Yujing Liu, Shujun Li et al.

G. H. Loh, E. Pei, D. Harrison et al.

Abstract Functionally Graded Additive Manufacturing (FGAM) is a layer-by-layer fabrication process that involves gradationally varying the material organisation within a component to achieve an intended function. FGAM establishes a radical shift from contour modelling to performance modelling by having the performance-driven functionality built directly into the material. FGAM can strategically control the density and porosity of the composition or can combine distinct materials to produce a seamless monolithic structure. This paper presents a state-of-art conceptual understanding of FGAM, covering an overview of current techniques that can enable the production of FGAM parts as well as identify current technological limitations and challenges. The possible strategies for overcoming those barriers are presented and recommendations on future design opportunities are discussed.

N. J. Wilkinson, M. Smith, Robert Kay et al.

Aerosol Jet Printing (AJP) is an emerging contactless direct write approach aimed at the production of fine features on a wide range of substrates. Originally developed for the manufacture of electronic circuitry, the technology has been explored for a range of applications, including, active and passive electronic components, actuators, sensors, as well as a variety of selective chemical and biological responses. Freeform deposition, coupled with a relatively large stand-off distance, is enabling researchers to produce devices with increased geometric complexity compared to conventional manufacturing or more commonly used direct write approaches. Wide material compatibility, high resolution and independence of orientation have provided novelty in a number of applications when AJP is conducted as a digitally driven approach for integrated manufacture. This overview of the technology will summarise the underlying principles of AJP, review applications of the technology and discuss the hurdles to more widespread industry adoption. Finally, this paper will hypothesise where gains may be realised through this assistive manufacturing process.

Qinglin Qi, F. Tao, Ying Zuo et al.

Abstract Digital twin provides an effective way for the cyber-physical integration of manufacturing. Meanwhile, smart manufacturing services could optimize the entire business processes and operation procedure of manufacturing, to achieve a new higher level of productivity. The combination of smart manufacturing services and digital twin would radically change product design, manufacturing, usage, MRO and other processes. Combined with the services, the digital twin will generate more reasonable manufacturing planning and precise production control to help achieve smart manufacturing, through the two-way connectivity between the virtual and physical worlds of manufacturing. This paper specifies and highlights how manufacturing services and digital twin are converged together and the various components of digital twin are used by manufacturers in the form of services.

Claudio Mandolla, A. Petruzzelli, G. Percoco et al.

Abstract Blockchain is becoming a widespread digital technology that allows every transaction to be tracked in an inviolable way, hence making it possible to go back through the entire history of products and product components. Its idiosyncratic characteristics can be especially useful in the aircraft industry, a highly technologically-based sector, wherein manufacturers of components are governed by stringent technical standards, the aim of which is to certify and monitor the whole component production process. In addition, the sector makes significant use of additive manufacturing technologies to perform the rapid prototyping of product components, realized through the supply chain, hence reducing time-to-market, while ensuring quality and containing costs. Starting from these premises, the paper focuses on the phases characterizing the metal additive manufacturing process, in which a component for the aircraft industry can be produced and proposes a digital twin for additive manufacturing in the aircraft industry through the exploitation of Blockchain solutions. In doing so, the paper provides a conceptual answer to securing and organizing the data generated through an end-to-end additive manufacturing process in the aircraft industry and underlines how companies exploiting Blockchain can build secure and connected manufacturing infrastructure.

C. Sun, Yun Wang, M. McMurtrey et al.

Abstract The conflict between rapidly growing global energy demand and climate change is a grand challenge that requires significant science and technology innovations. Advanced manufacturing could extensively drive down greenhouse gas emission and pollution, and shorten the time-to-market. Additive manufacturing is a process of fabricating three-dimensional objects by depositing materials layer-by-layer directly from computational geometry model, and it eliminates the design and fabrication restrictions of conventional manufacturing methods to a large extent. As an emerging and transformative technology, additive manufacturing technologies have shown the potential benefits of energy saving in multiple energy sectors. To further increase their applications in nuclear energy and renewable energies, fundamental research is needed to overcome some key challenges in terms of process monitoring and control, dimension accuracy, and structural integrity of the components. The validation and qualification of additive manufacturing processes and the products from those additive manufacturing processes are imperative to meeting the high standards of critical components in various energy production, conversion and storage systems. In this review article, we summarize the current status of cutting-edge additive manufacturing technologies and their applications in the fields of nuclear energy, battery, fuel cell, oil & gas. We also outline the major challenges and fundamental research needed to achieve the full potential of additive manufacturing technologies. This review provides critical discussion and prospects to address global energy challenges by applying innovative additive manufacturing technologies.

Alan T. L. Chan, E. Ngai, K. Moon

Abstract Responsiveness to customers and markets is an indispensable requirement for all industries, particularly the fashion industry. The present study attempts to address this issue by employing a resource-based perspective as a lens for exploring the major antecedents and consequences of supply chain agility at both the strategic and operational levels. Drawing on a review of the extant literature, we argue that two organizational flexibility factors – strategic flexibility and manufacturing flexibility – are the critical antecedents to supply chain agility. In addition, supply chain agility, strategic flexibility, and manufacturing flexibility are all significant factors in firm performance. A conceptual framework for the arguments was developed and tested through an empirical study of selected industrial practitioners. Data from a sample of 141 garment manufacturers were analyzed using structural equation modeling. The results reveal that both strategic flexibility and manufacturing flexibility positively influence supply chain agility. However, strategic flexibility has a direct and significant influence on firm performance while manufacturing flexibility does not. Furthermore, supply chain agility plays an important role in mediating the effects of both strategic and manufacturing flexibilities on firm performance. The findings of the present study add to the understanding of supply chain management, with a focus on supply chain agility in the fashion manufacturing industry.