TPT May 2010

W elding T echnology

Strip welding machines for coil joining

Solid-state high frequency welder EMMEDI is the tube and pipe division of SAET Group, and specialises in induction welding and annealing processes. The company’s MosWeld is a solid-state high frequency welder, available in power sizes from 100 to 1,000kWwith output frequencies ranging from 150 to 450kHz. MosWeld, with a very compact and robust design, uses a modular MOSFET- based inverter with very high efficiency. Easy maintenance and long-lasting performance are granted by the use of standard power components not subject to obsolescence, together with a special remote troubleshooting, process follow-up and simple inductor coils design. Emmedi – Italy Fax: +39 011 9974328

The laser welder is operated by a CO 2 slab laser with an output of up to 8,000W. The laser beam is used for rectangular cutting and welding of the strip ends by mirror optic, and it is possible to join different strip widths and thicknesses together at one time. For carbon steel, Ideal also offers also an annealing device, and a weld seam control system is also available as an option. Upon request, the machine can be equipped with pinch rollers for lengthwise positioning of the in- and outgoing strip ends, making it possible to position the strip ends of the coils precisely in the clamping device of the welding machine. The LAS 300 laser welder produces weld seams of high quality and surface finish. The weld joints may remain in the product, and they show a thin heating zone and possess high solidity.

IDEAL-WERK is a manufacturer of coil joining equipment, and offers various models of strip welding machine for the coil joining operation. The company’s LBS 043/080 is made for TIG welding of steel and non-ferrous strip up to 80mm wide. The machine has a pneumatic double cutting shear and a pneumatic clamping device, together with adjustable automatic torch drive. It offers ease of operation for the coil joining operation in front of tube and roll forming lines. In addition to other strip welding machines and flash butt welders for tubular components, the German manufacturer produces a laser welding machine for coil joining: Ideal type LAS 300. This machine can be integrated into continuous production lines for steel strip, and is designed to weld steel strip from 600 to 2,200mm wide and from 0.4 to 3mm thick. The laser coil joining machine produces a tight weld seam of deep-drawing quality, eliminating nearly all damage that might occur when coiling up the steel strip.

Ideal-Werk – Germany Fax: +49 2941 206 169 Email: info@ideal-werk.com Website: www.ideal-werk.com

Email: info@saetgroup.com Website: www.saetgroup.com

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Submerged arc-welding technology in the pipe and pressure vessel industry

PIPE welding facilities from Weldec GmbH are developed for longitudinal and circumferential submerged-arc welding (SAW), inside and outside. Weldec has concentrated its efforts on the main demands of the industry: mechanisation,

automation and a high efficiency of the SAW process. Starting with the analysis of the client’s requirements, the welding stand, the welding head and the pipe driving/turning device are individually designed to provide the best technical and economical solution. Based on hydraulic and electro-mechanical functions, the welding process can be started very quickly. The CNC-controlled multi-wire technique ensures a high melting deposit rate, especially at heavy wall thicknesses. The Weldec product range of welding facilities covers equipment for SAW longitudinal and circumferential welding and U-groove back milling; SAW plate welding; MAG pre-welding; RES overlay welding; LaserHybrid longitudinal welding; and PlasmaHybrid longitudinal welding.

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SAW technology from Weldec

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Weldec GmbH – Germany Fax: +49 2753 50703 30 Email: info@weldec.de Website: www.weldec.de

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M ay 2010

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