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2 2014

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The electromagnetic pulse technology (EMPT): forming, welding, crimping and cutting

Schäfer R., Pasquale P.

Biuletyn Instytutu Spawalnictwa w Gliwicach

2014

Vol. 58, No. 2

50--57

The electromagnetic pulse technology (EMPT) provides non-contact processes for joining, welding, forming and cutting of metals. EMPT processes can be used for joining, welding, forming and cutting of metals with particular success with those with high electric conductivity such as aluminum, copper and steel tubes. The procedure is so fast that it can produce solid-phase welds with a microstructure very similar to that of explosive welding. This article describes the fundamentals of the EMPT process, suitable machines and the economics of the process. Industrial applications of the technique are shown.

Wykorzystując impuls magnetyczny (EMPT), można w sposób bezdotykowy zmienić kształt, ciąć oraz łączyć materiały dobrze przewodzące prąd elektryczny, w tym m.in. aluminium, miedź i stal. Struktura złączy wykonanych metodą EMPT przypomina strukturę złączy uzyskanych w stanie stałym metodą zgrzewania wybuchowego. Niniejsze opracowanie prezentuje mechanizm działania tej metody oraz przedstawia wybrane podzespoły urządzenia. W opracowaniu podano przykłady kształtowania, cięcia i łączenia elementów.

Innovations in forming technologies

Kurka P., Schieck F.

Archives of Materials Science and Engineering

2014

Vol. 65, nr 2

72--76

Purpose: of this paper is the research of implementation of lightweight materials (aluminium, magnesium) as an important contribution for significant weight savings. Design/methodology/approach: Higher process stability, improved material exploitations, and generall shortening of process chains are the most important aims of Fraunhofer IWU. The requirements of the future car ask for lightweight construction concepts, in which materials, design, and manufacturing processes harmonize optimally. Therefore, Fraunhofer IWU researches on forming and joining technologies in order to achieve the optimum usage of high-strength steels, aluminium, magnesium, and fiber composite materials. Findings: New forming technologies as press hardening or electromagnetic forming (EMF) bring positive effects by resource efficiency and energy savings. When developing new materials, it is important to design the whole process chain according to the specific material properties. Practical implications: Press hardening offers an effective method of forming high strength steels. EMF is a high-speed forming technology applicable for shaping, joining, and cutting electrically conductive sheet metal or hollow profile components. Originality/value: The usage of lightweight materials is only reasonable when their mechanical characteristics such as stability, stiffness, and temperature resistance are better than those of classic steel. The same is true for the material and production costs.