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Wagner S.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Kranz B.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Wolski U.,Schweisstechnische Lehr und Versuchsanstalt Halle GmbH | Muglitz J.,ZIS Industrietechnik GmbH | Krink V.,Kjellberg Finsterwalde Plasma und Maschinen GmbH
Proc. of the Int. Conf. on Advances in Welding Science and Technology for Construction, Energy and Transportation, AWST 2010, held in Conj. with the 63rd Annual Assembly of IIW 2010

Plasma marking has effects on the static and fatigue strength of constructions. These effects must be known for a dimensioning of constructions. The objective of intensive investigations was to clarify these relations. For these specimens were plasma marked varying the plasma current to produce high quality labelled surfaces under industrial aspects. The material testing of these specimens includes macro-sections for determining the shape, mark depth and hardness in heat affected areas. Impact and tensile tests have been carried out to characterise the static strength. Finally, S-N curves were determined to check the fatigue behaviour compared to non-marked specimens as well as with the results of numerous punch marked steels and with the IIW recommendations for fatigue design of welded joints and components. Source

Kjellberg Finsterwalde Plasma Und Maschinen Gmbh | Date: 2014-11-25

An electrode holder for an arc plasma torch includes an elongate holder body. The holder body includes a holder end for receiving an electrode and a hollow interior. An internal thread is positioned in the hollow interior for screwing in a rear end of said cooling tube. A cylindrical inner surface adjoins the internal thread for centering the cooling tube relative to the electrode holder.

Kjellberg Finsterwalde Plasma Und Maschinen GMBH | Date: 2010-05-31

A nozzle for a liquid-cooled plasma torch, comprising a nozzle bore for the exit of a plasma gas jet at a nozzle tip, a first portion, the outer surface of which is substantially cylindrical, and a second portion adjacent thereto towards the nozzle tip, the outer surface of which tapers substantially conically towards the nozzle tip, wherein at least one liquid supply groove and/or at least one liquid return groove is/are provided and extend over the second portion in the outer surface of the nozzle (

Machova K.,TU Dresden | Zschetzsche J.,TU Dresden | Fussel U.,TU Dresden | Friedrich Ch.,TU Dresden | And 3 more authors.

The aim of the work was to develop an optimised technique for cutting textiles. The optical and mechanical characteristics of the materials for use in technical applications have restricted this process until now. The new plasma cutting process is an innovative cutting technique with the following advantages: • it expands and complements the range of applications of the thermal cutting process, • it is suitable for processing thermoplastic materials, glass fibres and spacer textiles, • it is economical and does not require any special health and safety measures to be put in place, • it is particularly suitable for small and medium-sized batches. Plasma cutting is quicker than an oscillating blade, although it is slower than a laser. The cutting speed is affected by the duration of heat transfer, melting, and subsequent cutting of the material. The heat from the plasma beam should be removed under the cut fabric to avoid heat from building up in the material and to prevent the edges from being damaged. This applies to materials having a low air permeability in particular, e. g. films or consolidated components. Heat build-up still occurs with highly conductive materials, such as carbon. Future work will concentrate on optimising the process of cooling the cut material to obtain an even better cutting result. Using different mixtures and combinations of gases would also be feasible to further reduce the build-up of heat in the cutting zone and to increase the cutting speed. Source

Machova K.,TU Dresden | Zschetzsche J.,TU Dresden | Fiissel U.,TU Dresden | Friedrich C.,TU Dresden | And 3 more authors.
Technische Textilien

The trend in almost all product development is to aim for product properties such as "easier, faster, more effective". The matrix materials reinforced with fibers or textiles will be increasingly used to meet these industry demands. Reinforced concrete, reinforced plastics, reinforced metals are innovative materials, which have better mechanical properties despite lower dimensions and often. The reinforcement is achieved by short or endless fibers. Endless reinforcing fibers are often processed as a tissue and combined with thermoplastic polymers, which built the matrix after heating. The offerings of mixtures tissues from glass fibers and various polymers are sufficiently available on the market. Source

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