The German BMBF-supported joint project "3D-Mikro" [1] aims to the integration of 3D-coordinate measurement equipment into highest precision machinetools. By inprocess measuring of tool geometries and workp...
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ISBN:
(纸本)0955308224
The German BMBF-supported joint project "3D-Mikro" [1] aims to the integration of 3D-coordinate measurement equipment into highest precision machinetools. By inprocess measuring of tool geometries and workpiece structures the uncertainties resulting from multiple clamping should be eliminated or at least diminished. The main focus of the research activities at fraunhofer IWU is the investigation and adaptation of suitable non-contact working sensors for pre-measuring of the microcutting tool and the micro-workpiece. In this article some selected results of the running test program are shown.
The functionalization of technical surfaces by microstructuring opens a variety of interesting possibilities, i.e. the generation of stain-resistant surfaces, the specific modification of the tribology of sheet metal ...
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Today's automotive manufacturers are required to meet ever greater demands for increased flexibility due to decreasing batch sizes. Solutions to meet these demands will bring about far-reaching changes to the mass...
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Today's automotive manufacturers are required to meet ever greater demands for increased flexibility due to decreasing batch sizes. Solutions to meet these demands will bring about far-reaching changes to the mass productions methods which currently dominate automotive manufacturing. In addition to the current need for sheet metal components, such trends will also have an effect on assembly and joining techniques used. The paper describes the challenge for production engineering resulting from current and future market demands.
Mechanical Machining of carbide metals is critical, as these materials belong to the hardest substances known. Electrochemical Machining (ECM) is presented as an alternative to conventional processing. This technique ...
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ISBN:
(纸本)0955308224
Mechanical Machining of carbide metals is critical, as these materials belong to the hardest substances known. Electrochemical Machining (ECM) is presented as an alternative to conventional processing. This technique dissolves conductive materials by anodic dissolution in neutral solutions at extremely high current densities of about 100 A/cm. This is independent from the hardness of the work piece and should therefore be favourable to structuring carbide metals. For the reason of carbide metal alloys being composites of extremely hard particles embedded in a softer matrix, ECM of these materials is complex due to the nonhomogenous structure as the components dissolve and passivate differently. The paper starts with results of modifying conventional micro tools made of tungsten carbide. In the second part the potential of working with a free electrolyte jet (EJM) is investigated.
The use of joinable formed sheet parts made of high-strength and high-tensile materials requires specifically adapted catting technologies to guarantee the requirements for dimensional *** cutting technology used,toge...
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The use of joinable formed sheet parts made of high-strength and high-tensile materials requires specifically adapted catting technologies to guarantee the requirements for dimensional *** cutting technology used,together with the tool and the machine,determine the parameters of the final part,depending on the geometry to be cut and the semi-finished products selected,although the interaction of the workpiece/tribology 、tool system is *** is therefore necessary to modify the tool design for cutting tools in shearing and precision cutting processes and to select appropriate tool materials of steel and ceramics whilst ensuring that the coatings used are sufficiently durable.
Due to many advantages such as low heat input and high welding speed, laser-welding technology is increasingly used for manufacturing. It is important for the user of laser welding technologies to optimally use the pl...
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Due to many advantages such as low heat input and high welding speed, laser-welding technology is increasingly used for manufacturing. It is important for the user of laser welding technologies to optimally use the plant capacities, to ensure high availability, and to avoid downtimes, rejections and rectifications of rejects. In order to solve the respective problems, the fraunhofer Institute for machinetools and formingtechnology, in cooperation with Volkswagen Sachsen AG and other partners, is developing a multi-sensor system for in-line process monitoring based upon fuzzy pattern recognition.
Due to the need for a significant reduction in the weight of parts in automotive manufacturing, the use of lightweight materials such as magnesium and aluminium is becoming increasingly important. Unfortunately, these...
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Glass is a commonly used material in the MEMS technology. Applications range from usage in the optical data transmission, MOEMS, applications in the micro-fluid analysis and bioengineering, packaging for housing and a...
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ISBN:
(纸本)0955308208
Glass is a commonly used material in the MEMS technology. Applications range from usage in the optical data transmission, MOEMS, applications in the micro-fluid analysis and bioengineering, packaging for housing and as insulating substrate for bonding. Functional structures are mostly applied in array arrangements on the glass wafer following other wafer level processes of the micro system technology. Among the numerous possibilities to structure glass at the surface, high temperature micro forming is one of the economically most favourable processes [1] [2], in particular for the manufacturing of higher quantities with high surface quality. With this technology it is possible to mould functional structures directly into bondable borosilicate glass. Former research results from within this research group on structuring of fluoride glasses [3] had shown the possibility of micro-structuring the material glass by moulding. After improving the equipment technology with respect to achievable forming temperatures up to 800°C, isothermal tempering and accurate controlling of the load transmission, the possibility to microstructure glass wafers of Pyrex®7740 and other borosilicate glasses is proven within a suitable process window.
Complex dynamic systems can be simulated using ANSYS®(ANSYS, Inc., Canonsburg, PA, USA) but for controller design Simulink®(MathWorks, Inc., Natick, MA, USA) is the appropriate software tool. The MATLAB®...
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ISBN:
(纸本)9783902661173
Complex dynamic systems can be simulated using ANSYS®(ANSYS, Inc., Canonsburg, PA, USA) but for controller design Simulink®(MathWorks, Inc., Natick, MA, USA) is the appropriate software tool. The MATLAB®(MathWorks, Inc., Natick, MA, USA) program makeStateSpace, which is introduced in this paper, transfers the results of ANSYS modal analysis into a modal state space formulation that can then be included in Simulink. A model order reduction to diminish the system size is also possible. Hence, with the help of makeStateSpace the advantages of both powerful software tools ANSYS and Simulink can be used for controller design.
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