For a specific manipulation of friction surfaces it is important to measure and calculate geometrical parameters to derive the tribological behavior. The new functional approach presented in this paper is the calculat...
For a specific manipulation of friction surfaces it is important to measure and calculate geometrical parameters to derive the tribological behavior. The new functional approach presented in this paper is the calculation of the characteristic lateral extension of the real contact surface as well as the representative contact radius by applying morphological filters to a 3D-set of data. All surface characteristics, including form, waviness, roughness as well as defined microstructures, are extracted holistically with a 3D Coordinate Measuring Instrument or a Form Measuring Instrument, but with the smallest available tip radius. The paper presents the benefit of this holistic extraction method and the application of morphological filtering for the description of the contact form (plateau or sphere), the real contact surface, number of contacts, the typical contact radius and the typical lateral extension of the micro contact plateaus.
Aluminium matrix composites are innovative lightweight construction materials, which usually consist of a relatively soft and ductile matrix and a hard ceramic reinforcing component. The high hardness of the reinforci...
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This paper describes the laser micro structuring of formingtools for hot embossing. The laser micro structuring allows the manufacturing of the required structural sizes and structure forms as well as the machining o...
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This paper describes the laser micro structuring of formingtools for hot embossing. The laser micro structuring allows the manufacturing of the required structural sizes and structure forms as well as the machining of the applied tool materials which can not be manufactured with conventional processes like milling. Through the systematic investigation of the influences of single laser parameters it is possible to influence the processing of 2-D and 2 1 2 -D micro fluid geometries. For initial experimental investigations the high strength ceramic material silicon carbide is used.
Micro impact extrusion is investigated at Chemnitz University of technology as a potential procedure for large area machining of micro cavities within the scope of the Collaborative Research Centre SFB/Transregio 39 P...
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The investigation of a novel sensor system, integrated in the main load region of formingmachines, is the challenge. Therefore, it is important that the thin film system has an excellent tribological quality in combi...
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Wrought magnesium alloys continue to have a great lightweight construction potential for bodymaking in the automobile industry. Within the framework of the investigations of an innovative regional growth nucleus calle...
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Wrought magnesium alloys continue to have a great lightweight construction potential for bodymaking in the automobile industry. Within the framework of the investigations of an innovative regional growth nucleus called TeMaK, comprehensive investigations were also conducted into the application potential of various ultramodern joining technologies. This article introduces results with regard to the laser welding, laser-MIG welding and MIG welding (metal inert gas welding) of magnesium sheets and the practical application for the manufacture of magnesium tailored blanks for the fabrication of a magnesium automobile door as a demonstrator.
An actual problem of the efficiency in machinetools is investigated by the improvement of the active power factor correction. An analysis of one method of the active power factor correction in machinetools is perfor...
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An actual problem of the efficiency in machinetools is investigated by the improvement of the active power factor correction. An analysis of one method of the active power factor correction in machinetools is performed. A development of the active power factor correction is offered on the basis of the reduction of the power recovery in an infeed/regenerative module and the expansion of the dc link. The power factor correction in a machine tool is explored by means of experimental measurements and simulations of the electric system in a machine tool.
The straightening technics is one of important means to improve the straightness of metal bar. A novel way of predicting the straightening stroke is proposed based on mathematical methods and bending experimental and ...
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The straightening technics is one of important means to improve the straightness of metal bar. A novel way of predicting the straightening stroke is proposed based on mathematical methods and bending experimental and numerical simulation. The experimental and numerical simulation is conducted by following the mathematical load-stroke model of press straightening process under the elastic-plastic theory. For the linear guide rails, as an example, the stroke-deflection model focusing on the straightening stroke prediction can be achieved by contrasting and integrating the bending experimental results and finite element methods (FEM) simulation data. And then the formula for predicting the straightening stroke is presented based on the precise straightening stroke-deflection model. The stroke prediction formula with high precision can be applied to the straightening stroke prediction in the high straightness metal bar manufacturing process and automatic straightening machine conveniently.
The hot embossing of glass received an enormous growth push through the mass production of aspheric lenses by precision glass moulding particularly in Asia in the last years. Deficits still exist regarding the accurac...
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