Papers by Keyword: Manufacturing Process

Abstract: Lithium-ion batteries have been the dominant energy storage technology in consumer electronics for several years and meanwhile advanced into e-mobility and stationary applications. The trend towards large-scale batteries presents manifold challenges to production technology. One decisive assembly process is filling electrolyte liquid into the battery case. This paper discusses the main influences and challenges for production technology concerning this crucial manufacturing process and how they are addressed. First preliminary results are presented.

Abstract: Internet of Things (IoT) is a technology enabling identification of individual devices, providing mutual communication between them and their user, and allowing them to cooperate. What is more, IoT delivers tools for simplification of monitoring and controlling of processes. The present article introduces an evolved solution to the Internet of Things usage in a machine cutting process of laminated boards relying on the Cloud Computing technology.

Abstract: This paper describes the application of a ratio-delay to a study of operations of mechanical Job-Shop production in Samara factory. To analyze the operations efficiency it may be necessary to obtain organizational and technical data in each job stages. In fact, ratio-delay is an effective tool to determine direct labor productivity for shop floor activities. In the context of manufacturing operations, ratio-delay can determine productivity levels as a baseline that provides focus for new “industrial engineered” improvement measures of complex re-engineering project or lean management.

Abstract: This paper takes a first step toward connecting theory concerning Lean methodology and the manufacturing organization by using Tecnomatix Plant Simulation tools. We built a simple Input-Output production model to show the main Method and Objects in Tecnomatix Plant Simulation, which are optimized systems for reducing waste and increasing throughput.

Abstract: Modern car-bodies consist of different types of metals in order to gain the best crash performance at minimal weight. After the press and body shop, the bodies in white run through several paint drying processes, where also alloys of the 6xxx series become heat-treated. Consequently, the different thermal expansion behaviour of joined aluminium-steel components leads to high bending stress conditions within the car body structure while they heat up to 200 °C. In order to describe the process deformations numerical simulations were developed, where appropriate material models are necessary. Especially aluminium alloys with a melting point of about 600 °C can exhibit viscoplastic behaviour at 200 °C under stress. In this work, creep characteristics of the aluminium alloy AA6016 are investigated using a bending test. Based on these results an adequate model for finite element (FE-) simulations of creep strains is pointed out, which can be used for novel analyses of the whole car body in the automotive e-coat drying process.

Abstract: In this paper, the pressure vessel of a project is mentioned, the key technique of multilayer-wrapped type cylinder system and inspection technology are discussed. This paper analyzed the main manufacturing difficulties, which can provide reference for similar products.

Abstract: Titanium alloy (Ti6Al4V) is the most widely used alloy grade of titanium in the aerospace industry because of its excellent properties. Laser beam forming is a highly flexible rapid prototyping and low-volume manufacturing process that employs laser-induced thermal distortion to shape sheet metal parts without hard tooling or external forces. The resulting formed shape and the curvature are determined by the beam power and size, scanning velocity, number of scan irradiations and the effect of cooling, all these form part of the process parameters that have to be optimised in order to achieve the desired shape and properties in formed components. Hence, a good control of the process parameters is inevitable to achieve these desired properties. Controlling a single process parameter in a process may be considered easy to manage than a system of multiple parameter process such as a laser beam forming process. This study investigates the effect of the scan velocity, laser power and cooling effect on the developed curvature with the aim of achieving good structural integrity.

Abstract: The thermal resistance of natural fibers is a relevant property for technical application associated with relatively high temperature levels. In polymer composites manufacturated with natural fibers the resistance to thermal degradation may become a critical factor not only with respect to processing temperature but also in-service heating operational conditions. In the present work, epoxy composites incorporated with up to 30 vol% of fibers extracted from the petiole of the buriti palm tree were manufactured and evaluated by thermogravimetric analysis, by means of the TG, and its derivative, DTG, curves from room temperature to 700°C. The results showed thermal resistances above 200°C for both the isolated buriti fibers and its manufactured composites.

Abstract: Neutron beam is a very useful probe for material characterization and non-destructive testing. There are a number of plans to construct neutron instrumens using focusing mirror to improve beam quality with higher intensity and smaller spot size. In this paper, an ellipsoidal mirror made by a metal substrate is proposed. As the metal substrate, electroless nickel is adopted because of its amorphous structure, machinability and relatively large critical angle of neutron reflection. The design of ellipsoidal neutron focusing mirror is made by considering the neutron reflectivity. A mirror is fabricated by ultrahigh precision cutting and 1^st polishing process, and the form accuracy of 5 μm P-V with surface roughness of 0.7 nm Ra is obtained. Through this experimental fabrication, the feasibility of the proposed method is verified.

Abstract: A product manufacturing involves, automatically, an amount of carbon emitted in the atmosphere. This carbon amount is determined by the consumption level of the resources in the manufacturing process, namely the consumed material and energy. The researches concerning the environmental impact issued by the manufacturing process are based on several concepts like carbon footprint and specific energy consumption, in order to reveal solutions for diminishing this impact. Here, we are introducing a deeper approach of the same issue, grounded on a broader meaning of the environmental impact concept. We are also suggesting a dedicated indicator to measure this impact: the ecological earning power (EcoEP), which is defined by making a connection between the earning power and the environmental impact, judged at the same level (be it the process / operation / job / order / manufacturing system level). EcoEP represents, in fact, a trade off between the economical target of the manufacturer (to earn) and the consequence of its actions, regarded from ecological point of view.