EoW September 2010

technology news

Metal tape forming and welding technology

Rosendahl has broadened its portfolio to offer welding and corrugation equipment for power cable applications following the demand of the industry for alternative solutions, and based on experience of successful projects in the field of metal tape forming, welding and corrugation for high-end RF cables. Cable manufacturers require this technology for products such as cables for wind farms, offshore power stations or cables for submarine appli-

Welding and corrugation equipment for power cables ▲ ▲

cations. The LV segment also includes a number of products (oil-pump, shipboard, signal cables), which use the Rosendahl technology to improve product properties or to increase productivity during the manufacturing process. Compared to other technologies (alumi- nium or lead extrusion) the metal tape forming and welding system has several advantages. It shows better results for continuous operation, economic use of electric power and water, reduced scrap during production, dimension change and the possibility of using different metallic materials for shielding. Cables produced in this way are said to demonstrate superior mechanical stability and water and/or gas tightness. Technologies developed and optimised for these applications include: Optimised formers for various • materials

Welding processes – to ensure perfect weld seams with minimal heat affected zones and best mechanical properties High speed corrugators for helical and annular corrugation for copper, aluminium and stainless steel For metal shielding by means of smooth or corrugated aluminium, copper or stainless steel, Rosendahl offers solutions for the tape forming, welding and tube reduction process including adequate down stream equipment. Depending on the cable design, space availability and product mix, Rosendahl is in the position to serve inline (in combination with the jacketing process) and offline solutions. Rosendahl Maschinen GmbH – Austria Fax : +43 3113 5100 59 Email : office@rosendahlaustria.com Website : www.rosendahlaustria.com • •

New induction heating systems At wire 2010, ATE presented two new induction heating systems to complete its range of continuous heating systems for the parallel treatment of wires. The new systems are called IMW and CMW. The main feature of the IMW system is the simultaneous heating of each wire, even where they have different diameters, by means of a dedicated inductor fed by the related frequency converter. The CMW system is instead designed for a bundle of wires, heated using a single inductor fed by a single frequency converter. The advantages of these new systems over traditional systems are in terms of efficiency, energy consumption, quality and compactness. Applications may include annealing, stress relieving, brass-diffusion and pre-heating or other industrial processes requested by the end-user. ATE Applicazioni TermoElettroniche Srl – Italy Fax : +39 0444 406434 Email : info@ate.it Website : www.ate.it

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EuroWire – September 2010