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Evaluation of the Technical-Economic Potential of Particle- Reinforced Aluminum Matrix Composites and Electrochemical Machining

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IOP Conference Series: Materials Science and Engineering 2016年第1期118卷

作者： A Schubert U Götze M Hackert-Oschätzchen N Lehnert F Herold G Meichsner A Schmidt Technische Universität Chemnitz Professorship Micromanufacturing Technology Chemnitz Germany Fraunhofer Institute for Machine Tools and Forming Technology Chemnitz Germany Technische Universität Chemnitz Professorship of Management Accounting and Control Chemnitz Germany franziska.herold@wirtschaft.tu-chemnitz.de

Compared to conventional cutting, the processing of materials by electrochemical machining offers some technical advantages like high surface quality, no thermal or mechanical impact on the work piece and preservation of the microstructure of the work piece material. From the economic point of view, the possibility of process parallelization and the absence of any process-related tool wear are mentionable advantages of electrochemical machining. In this study, based on experimental results, it will be evaluated to what extent the electrochemical machining is technically and economically suitable for the finish-machining of particle- reinforced aluminum matrix composites (AMCs). Initial studies showed that electrochemical machining - in contrast to other machining processes - has the potential to fulfil demanding requirements regarding precision and surface quality of products or components especially when applied to AMCs. In addition, the investigations show that processing of AMCs by electrochemical machining requires less energy than the electrochemical machining of stainless steel. Therefore, an evaluation of electrochemically machined AMCs - compared to stainless steel - from a technical and an economic perspective will be presented in this paper. The results show the potential of electro-chemically machined AMCs and contribute to the enhancement of instruments for technical-economic evaluations as well as a comprehensive innovation control.

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Effect of new adhesion promoter and mechanical interlocking on bonding strength in metal-polymer composites

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IOP Conference Series: Materials Science and Engineering 2016年第1期118卷

作者： A Schuberth M Göring T Lindner G Töberling M Puschmann F Riedel I Scharf K Schreiter S Spange T Lampke Materials and Surface Engineering Group Institute of Materials Science and Engineering Technische Universität Chemnitz 09125 Chemnitz Germany Polymer Chemistry Technische Universität Chemnitz 09111 Chemnitz Germany Department of Joining and assembling Fraunhofer Institute for Machine Tools and Forming Technology IWU 09126 Chemnitz Germany

There are various opportunities to improve the adhesion between polymer and metal in metal-plastic composites. The addition of a bonding agent which reacts with both joining components at the interfaces of the composite can enhance the bonding strength. An alternative method for the adjustment of interfaces in metal-plastic composites is the specific surface structuring of the joining partners in order to exploit the mechanical interlock effect. In this study the potential of using an adhesion promoter based on twin polymerization for metal-plastic composites in combination with different methods of mechanical surface treatment is evaluated by using the tensile shear test. It is shown that the new adhesion promoter has a major effect when applied on smooth metal surfaces. A combination of both mechanical and chemical surface treatment of the metal part is mostly just as effective as the application of only one of these surface treatment methods.

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The suitability of analytical and numerical methods for developing clinching processes with thick sheet metal

The suitability of analytical and numerical methods for deve...

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WGP Congress 2012

作者： Israel, Markus Fraunhofer Institute for Machine Tools and Forming Technology IWU Reichenhainer Str. 88 09126 Chemnitz Germany

ISBN: (纸本)9783038350538

At present, the use of clinching is mainly restricted to thin sheet metal. Here the joining technology is used for assemblies in mass production due to its great coast efficiency. However, the branches of industry working with thick sheet metal (utility and rail vehicle engineering, shipbuilding and general structural steel engineering) represent a major potential for using clinching technology. Unfortunately, the suitability of clinching for connecting jobs with substantially greater sheet metal thicknesses has neither been sufficiently investigated, nor are there suitable toolsets among system manufacturers that are adapted to the larger overall sheet metal thicknesses. Instead, the state-of-the-art for ascertaining tools for larger sheet metal thicknesses and point dimensions is trial and error accepting the high costs caused by producing a large number of tools and experiments. This paper demonstrates some analytical approaches to this problem and how suitable they are to describing the process of clinching in comparison to the potential of calculation with FEA. © (2014) Trans Tech Publications, Switzerland.

关键词： Sheet metal

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Characterisation of tool coatings for press hardening

Characterisation of tool coatings for press hardening

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6th International Conference on Tribology in Manufacturing Processes and Joining by Plastic Deformation, ICTMP 2014

作者： Müller, Roland Mosel, André Fraunhofer-Institute for Machine Tools and Forming Technology IWU Reichenhainer Straße 88 09126 Chemnitz Germany Chemnitz University of Technology Machine Tools and Forming Technology Straße der Nationen 62 09107 Chemnitz Germany

ISBN: (纸本)9783038351276

Hot sheet metal forming is gaining in importance in many fields, because of its capability to produce more complex components than possible with cold forming. Hot forming is also used to influence the final material properties with the hot forming of manganese-boron steels being a good example. One of the major challenges in hot forming is the tribological conditions between the tool and sheet material at the required high temperatures. This article will discuss the influence of different tool material coatings, ranging from PVD to mechanically bonded ceramic coatings, on the tribological conditions during forming. It will also shed light on how these coatings influence the heat transfer between the component´s material and the tool material. © (2014) Trans Tech Publications, Switzerland.

关键词： Heat transfer

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Strategy framework for technology platforms within the context of diversified companies

Strategy framework for technology platforms within the conte...

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IEEE International Conference on Industrial Engineering and Engineering Management

作者： G. Schuh S. Ryschka Laboratory for Machine Tools and Production Engineering WZL RWTH Aachen University Aachen Germany Department of Technology Management Fraunhofer Institute for Production Technology IPT Aachen Germany

ISBN: (纸本)9781467380676

The significance of technology platforms as interconnected networks of technological knowledge is steadily growing in diversified companies. The reason is that technology platforms support diversified companies to handle the conflicting priorities of fulfilling the customer demand for individualized innovations, while generating company-wide technological synergies. Hence, the success of diversified companies can be significantly affected by technology platforms and a consistent framework that enables the description of technology platform strategies. In practice however, a low degree of systematization regarding the description of technology platforms and their strategies is noticeable, leading to unsustainable platform concepts. The reason is that there is no established opinion in theory about the relevant strategy elements and subsequently no cohesive strategy framework, which supports the description of technology platform strategies. Therefore, in this paper we develop a consistent strategy framework for technology platforms in diversified companies, in order to describe sustainable strategies for technology platforms.

关键词： Companies Context Knowledge engineering technology management Couplings

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Life Cycle Oriented Milling Tool Management in Small Scale Production

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Procedia CIRP 2015年 29卷 293-298页

作者： Dominik Heeschen Fritz Klocke Kristian Arntz Fraunhofer-Institute for Production Technology (IPT) Steinbachstraße 17 52074 Aachen Germany Laboratory for Machine Tools and Production Engineering (WZL) RWTH Aachen University Steinbachstrasse 19 52074 Aachen Germany

The milling technology is characterized as the most important manufacturing technology in a variety of industries. Moreover, recent developments in hardware and software issues have increased technology's complexity which is, beyond others, caused by different milling variants and a high number of different milling tools. Milling tools are responsible for a significant cost position in manufacturing driven companies which is shown in the paper by an industry wide survey. Due to the costly and wasteful production it can be shown that this is a significant cost driver. This paper introduces an integrated life cycle oriented approach for the standardization and optimization (including the reuse of tools by standardized repair processes) of milling tools in order to enhance the life cycle of milling tools, reduce overall costs and therefore raise the company's sustainability.

关键词： Life Cycle Management Life Cycle Optimization Life Cycle Costing LCC Manufacturing Milling tools

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New Feature Extraction and Processing Methods for the Advanced Knowledge Based Process Planning of forming Operations

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Procedia CIRP 2015年 28卷 16-21页

作者： R. Neugebauer M. Werner M. Pröhl G. Brunnett T. Kühnert Fraunhofer Gesellschaft zur Förderung angewandter Forschung e. V. Postfach 20 07 33 80007 Munich Germany Fraunhofer Institute for Machine Tools and Forming Technology Reichenhainer Straße 88 09126 Chemnitz Germany Department of Computer Science Technische Universität Chemnitz Straße der Nationen 62 09107 Chemnitz Germany

A new method for the automated extraction, recognition and interpretation of forming features is presented. The motivation is to apply knowledge based engineering (KBE) methods more intensively on process planning procedures for forging, tube hydroforming and sheet metal forming. With a new thinning method three-dimensional (3D) CAD data is reduced to a 1D skeleton graph. By curvature based segmentation of the surface and the neighborhood relations further information are provided. Depending on the gained classification, analyzing algorithms can be performed again with an adapted level of detail. Herewith the process planning can be supported on a much higher level than before. Video abstract Download : Download video (3MB)

关键词： Feature extraction Knowledge based engineering Process planning forming operations Forging Tube hydroforming Sheet metal forming

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Reducing blade manufacturing cost while maintaining aerodynamic performance of vertical axis wind turbines

Reducing blade manufacturing cost while maintaining aerodyna...

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European Wind Energy Association Conference and Exhibition 2014, EWEA 2014

作者： Domínguez, Diego Pröhl, Marco De Troyer, Tim Feng, Guoying Werner, Markus Runacres, Mark Department of Engineering Technology Vrije Universiteit Brussel Brussels Belgium Fraunhofer Institute for Machine Tools and Forming Technology IWU Chemnitz Germany

Vertical axis wind turbines have experienced a renewed impulse during the last few years, with important research efforts focused on them. This work is focused in the development of new blade designs capable of notably reduce their manufacturing cost and, consequently, improve global profitability. Thanks to the aerodynamic and structural analyses that have been carried out, a final blade design has been achieved. It is based on the use of hydroforming manufacturing techniques with metal sheets, creating 3 meters blades to be used in a turbine capable of produce about 1kW. First estimations show that with the positive effects of a mass use and production (economies of scale), such metal blades have a 90 % reduction potential in their production costs compared to fibre-reinforced ones for single turbines.

关键词： Turbomachine blades

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Technological and Economical Assessment of Alternative Process Chains for Blisk Manufacture

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Procedia CIRP 2015年 35卷 67-72页

作者： F. Klocke R. Schmitt M. Zeis L. Heidemanns J. Kerkhoff D. Heinen A. Klink Labratory for Machine Tools and Production Engineering WZL of RWTH Aachen University Steinbachstr. 19 52074 Aachen Germany Fraunhofer Institute for Production Technology IPT Steinbachstr. 17 52074 Aachen Germany

Due to the increase of blisk (blade integrated disk) demands instead of the conventional fir-tree design in current aero-engine concepts there is a high resource-driven need for a comprehensive evaluation of different process chain alternatives for blisk manufacture. Therefore, in this paper different manufacturing chains consisting of roughing, pre-finishing and finishing/polishing are compared to each other by the example of a HPC-blisk out of Inconel 718. Beside conventional milling and electrochemical machining also alternative manufacturing technologies like wire-based laser cladding, water jet cutting and automated polishing are taken into account. Based on a technological analysis an adaptable methodology is introduced, which allows an independent economical assessment of different process chains regarding e.g. company-specific boundary conditions or different production quantities.

关键词： Blisk Assessment Process Chain

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Robot control as a service - Towards cloud-based motion planning and control for industrial robots 10

Robot control as a service - Towards cloud-based motion plan...

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10th International Workshop on Robot Motion and Control, RoMoCo 2015

作者： Vick, Axel Vonásek, Vojtěch Pěnička, Robert Krüger, Jörg Department of Industrial Automation Technology Institute for Machine Tools and Factory Management Technische Universität Berlin Pascalstr. 8-9 Berlin10587 Germany Czech Technical University in Prague Faculty of Electrical Engineering Technicka 2 Prague16627 Czech Republic Department of Robotics and Automation Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstr. 8-9 Berlin10587 Germany

ISBN: (纸本)9781479970438

This paper introduces a new concept for flexible motion planning and control of industrial robots. Instead of a closed monolithic architecture, an open service-based framework is proposed. The services can be run hardware-independent on a decentralized IT infrastructure (Cloud) allowing a fast reconfiguration of control modules and their multiple usage in different tasks. The services can be run on a dedicated PC or on individual virtual machines inside a single computing cluster. The proposed service-based framework was implemented and tested for the motion planning of a robotic manipulator. Effects on control performance, availability and scalability are investigated and documented. © 2015 IEEE.

关键词： Motion planning

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