检索结果-内蒙古大学图书馆

International Conference on Research Challenges in Information Science, RCIS

作者： Mohamad Ajami Louisa Grabner Giovanni Giambene Van Le Doanh Luong John Pearson Automation Technology Fraunhofer-Institute for Production Systems and Design Technology (IPK) Berlin Germany Department of Information Engineering and Mathematical Sciences University of Siena Siena Italy Faculty of Computer Science University of Namur Namur Belgium

ISBN: (纸本)9781479987115

This paper deals with the implementation of an online platform for Responsible Research and Innovation (RRI), which provides anticipatory and deliberative tools to address societal expectations with regard to resrarch and innovation and mobilises information technology tools for inclusive, responsive and sustainable research. In particular, we have developed a Forum, which is a Web-based application and service for stakeholders (members of the RRI community) to deliberate and discuss about RRI. Different interaction modalities are supported by the Forum, such as: `Caucus Process', Suggestion Board, Partnership Initiative, etc. A special attention is devoted to the Citizen Jury and Tacit Knowledge modules that represent innovative features of our Forum. The outcomes show that our online Forum represents an effective solution to address RRI issues by adopting e-Government and knowledge management approaches. This work was carried out as part of EU FP7 Responsibility project.

关键词： Rail to rail inputs Technological innovation Stakeholders Electronic mail Electronic government Knowledge management Computer science

来源：评论

学校读者我要写书评

暂无评论

Machining of Hygroscopic Materials by High-pressure CO 2 Jet Cutting

引用

Procedia CIRP 2016年 48卷 57-61页

作者： Eckart Uhlmann Martin Bilz Johannes Mankiewicz Simon Motschmann Patrick John Fraunhofer Institute for Production Systems and Design Technology (IPK) Pascalstraße 8-9 Berlin 10587 Germany Institut für Werkzeugmaschinen und Fabrikbetrieb (IWF) TU-Berlin Pascalstraße 8-9 Berlin 10587 Germany

Cutting with a high-pressure CO 2 jet has the potential for a dry and residue-free machining of hygroscopic materials. An experimental system for continuous CO 2 high-pressure jets at atmospheric conditions was developed. The high-pressure liquid CO 2 expands into atmospheric pressure after exiting the nozzle and changes to gas and particles and can be used for the machining of parts and surfaces. The investigations led to first expertises for the continuous jet cutting with high pressure CO 2 at atmospheric conditions with jet pressures of up to 3000 bar. Commercial blasting plants are not available yet and only research institutes hold prototypes and experimental systems. During the technological examinations the mass flow and impulse forces of CO 2 and high-pressure water jets were determined and compared experimentally. Identical cutting tests were carried out with polyurethane. Principal similarities are shown in the produced cutting surfaces and grooves of both processes. The experiments indicated that the effects of the individual blasting parameters are identical to the impulse force and groove depth for both processes. The high-pressure CO 2 jet offers a dry and residue-free machining of hygroscopic materials. The process can be integrated decentralized and directly into production lines. According to the current knowledge, the limitation for the cutting of materials, depending on the thickness of the workpiece, is a maximum hardness of 60 Shore D at a maximum density of 600 g/cm 3 . Thus, the process is currently limited to the processing of synthetic and natural materials.

关键词： Cutting Machine tool Manufacturing

来源：评论

学校读者我要写书评

暂无评论

Two-axis vibration system for targeted influencing of micro-milling 15

Two-axis vibration system for targeted influencing of micro-...

引用

15th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2015

作者： Uhlmann, E. Perfilov, I. Oberschmidt, D. Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Germany Fraunhofer Institute for Production Systems and Design Technology IPK Germany

ISBN: (纸本)9780956679079

Micro milling is a well-established manufacturing process for mould and die industry, which gains an increasing scope of usage for medical and biotechnical components and applications. Apart from manufacturing of microsystems, micro milling is also being applied for production of function-oriented surfaces, which improves the component functionality. The influence on surface topography and surface roughness in the process of micro milling can be achieved by means of targeted high-frequency vibration of a workpiece. There was developed a system to perform vibration assisted micro milling, which excites a workpiece in two directions horizontally to the spindle axis. For exploring of vibration assisted micro milling there was developed a system which excites the high-frequency vibration of a workpiece in two directions horizontally to the spindle axis. Frequency, amplitude and phase shift of the oscillation are controlled in accordance to the rotational angle of the machine tool spindle. Therefore, a closed loop control of a workpiece actuation considering the actual spindle speed is implemented. The system enables 2 DOF vibration assisted milling up to f = 10 kHz with a maximum amplitude of a = 7,5 μm. With usage of necessary industrial hardware vibration assisted micro milling offers a new and fast way of process optimization and surface structuring. This paper presents detailed information on the device for vibration assisted micro milling and the results of the milling tests in order to show the high potential for further research activities in the area.

关键词： Milling (machining)

来源：评论

学校读者我要写书评

暂无评论

New machine tool concept for two-side ultra-precision machining 15

New machine tool concept for two-side ultra-precision machin...

引用

15th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2015

作者： Uhlmann, E. Oberschmidt, D. Polte, J. Polte, M. Guhde, S. Fraunhofer Institute for Production Systems and Design Technology IPK Germany Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Germany

ISBN: (纸本)9780956679079

The requirements regarding workpiece surface quality, geometrical and positional accuracy as well as tolerances for linear and angular dimensions are increasing. Furthermore, the machine technology limits and defines the manufacturing quality directly. Hence, the fraunhofer institute FOR PRODUCTION systems AND design technology ipk AND THE institute FOR MACHINE TOOLS AND FACTORY MANAGEMENT IWF of the TU Berlin have developed a new machine tool concept for ultra-precision machining. This enables two-side machining of the front surfaces of optical elements. The concept aims at increasing the economic efficiency of ultra-precision machining.

关键词： Machine tools

来源：评论

学校读者我要写书评

暂无评论

Cutting of steel X13NiMnCuAl4-2-1-1 with micro milling tools using a defined cutting edge preparation 15

Cutting of steel X13NiMnCuAl4-2-1-1 with micro milling tools...

引用

15th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2015

作者： Uhlmann, E. Oberschmidt, D. Loewenstein, A. Kuche, Y. Winker, I. Fraunhofer Institute for Production Systems and Design Technology IPK Germany Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Germany

ISBN: (纸本)9780956679079

An approach to improve the wear behaviour of micro milling tools is a defined cutting edge preparation applying immersed tumbling. In experimental investigations a 3-axes machine tool is used to analyze the influence of the wear behaviour of prepared micro milling tools with diameters D = 0.2 mm made of cemented carbide. During machining of steel X13NiMnCuAl4-2-1-1 the process behaviour is analyzed, the cutting forces Fc in the milling process are examined and the surface roughness of the workpiece is measured.

关键词： Milling (machining)

来源：评论

学校读者我要写书评

暂无评论

A chemical consideration of binderless-cBN as cutting material for ultra-precision turning 15

A chemical consideration of binderless-cBN as cutting materi...

引用

15th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2015

作者： Uhlmann, E. Sturm, H. Oberschmidt, D. Polte, J. Polte, M. Lorenz, D. Frenzel, S. Fraunhofer Institute for Production Systems and Design Technology IPK Germany Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Germany Germany

ISBN: (纸本)9780956679079

Ultra-precision cutting of stainless steel with diamond as cutting material needs modification of the workpiece material or special equipment for vibration assisted machining. In this paper detailed information about the chemical reaction for direct cutting of stainless steel with binderless-cBN while turning is given. The effect of lubricant on the wear of binderless-cBN is shown and confocal Raman spectroscopy with confocal imaging was done on the cutting tools.

关键词： Stainless steel

来源：评论

学校读者我要写书评

暂无评论

Modelling and Simulation of Grinding Processes with Mounted Points: Part I of II - Grinding Tool Surface Characterization

引用

Procedia CIRP 2016年 46卷 599-602页

作者： E. Uhlmann S. Koprowski W.L. Weingaertner D.A. Rolon Fraunhofer – Institute for Production Systems and Design Technology (IPK) Pascalstr. 8-9 10587 Berlin Germany Technical University Berlin – Institute for Machine Tools and Factory Management (IWF) Pascalstr. 8-9 10587 Berlin Germany Federal University of Santa Catarina – Department of Mechanical Engineering 88040-900 Florianpolis SC Brazil

Grinding tool topography is one of the several key aspects of the modelling of a grinding process. Simplifying it could mean less processing time needed, but it can lead to inaccurate simulation results. Considering that, this research aims to develop a reliable method for NC-grinding processes with abrasive mounted points, describing the grinding tool surface using a single profile of kinematic cutting edges instead of its whole topography. In order to achieve this, numerical and empirical experiments were conducted proving the feasibility of the model to implement it for future simulations.

关键词： Grinding Topography Modelling.

来源：评论

学校读者我要写书评

暂无评论

Quality optimized additive manufacturing through measuring system analysis 2

Quality optimized additive manufacturing through measuring s...

引用

2nd ASPE Topical Meeting on Achieving Precision Tolerances in Additive Manufacturing

作者： Uhlmann, Eckart John, Patrick Kashevko, Vasyl Gerlitzky, Georg Bergmann, André Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Berlin Germany Institute for Production Systems and Design Technology IPK Fraunhofer-Gesellschaft Berlin Germany

来源：评论

学校读者我要写书评

暂无评论

Study on additive manufacturing of inner contoured tools 2

Study on additive manufacturing of inner contoured tools

引用

2nd ASPE Topical Meeting on Achieving Precision Tolerances in Additive Manufacturing

作者： Uhlmann, Eckart Bergmann, André Gridin, Witalij Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Berlin Germany Institute for Production Systems and Design Technology IPK Fraunhofer-Gesellschaft Berlin Germany

来源：评论

学校读者我要写书评

暂无评论

Binderless-PCD as cutting material for micro milling of cemented carbide moulds 15

Binderless-PCD as cutting material for micro milling of ceme...

引用

15th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2015

作者： Uhlmann, E. Oberschmidt, D. Loewenstein, A. Polte, M. Polte, J. Gonia, D. Fraunhofer Institute for Production Systems and Design Technology IPK Germany Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Germany SUMITOMO Electric Hartmetall GmbH Germany

ISBN: (纸本)9780956679079

The high-precision cutting of cemented carbide with geometrical defined cutting edge is due to high tool wear restricted. A new promising diamond based cutting material for machining cemented carbide has been developed by SUMITOMO ELECTRIC Hardmetal Corporation, Itami, Japan. In this paper, detailed information about the properties of the developed binderless-PCD are given. Furthermore, results of experimental studies with binderless-PCD as cutting material while milling cemented carbide are shown. As the result of this work the successful application of binderless-PCD as cutting material for machining cemented carbide could be shown. An arithmetical mean deviation Ra = 28 nm could be achieved by using a spindle speed n = 50 000 1/min and a feed per tooth ft = 0.5 μm.

关键词： Milling (machining)

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：