TPT July 2016

T E CHNOLOG Y

New welding process for advantages in efficiency

Photo credit: EWM AG

working with CrNi steels. Switching from standard GMAW welding to the new process is also easy. The excellent wetting of the process makes it easy to handle, requiring almost no practice time, and a reduction in welding fumes

THE new forceArc puls welding process from EWM AG combines the strengths of forceArc with the advantages of a pulsed arc, enabling wide applicability, low heat input and higher welding speeds. The new MIG/MAG welding process is suitable for the welding of both unalloyed or low-alloy steels and chrome nickel steels. Its deep penetration makes it especially suitable for root welding with single- and double-sided full penetration. In comparison to pulsed arc welding, the process enables up to 20 per cent higher welding speeds with an identical throat thickness. The new process is also characterised by a lower heat input, reducing discolouration and minimising distortion. As the arc is also nearly spatter-free, this reduces reworking and straightening work by up to 50 per cent – a particular advantage when

forceArc puls achieves up to 20 per cent greater penetration depth compared to the pulsed arc

forceArcpulsalsobringstechnological advantages in a range of applications. Users working in accordance with EN 1090 find the depth of penetration enables higher strength values in the joint. The effective and total weld seam thickness is higher than the nominal seam thickness, making welding often possible with just a single pass.

brings high operator acceptance levels. Pierre Mack, managing director of Mesa Metall-Stahlbau, commented, “We have managed to reduce production times for welding and grinding by an incredible 57 per cent.” His company had required 781 working hours for the production of four water containers for fire and rescue trains using conventional welding technology; the introduction of the new EWM arc and EWM technology required only 339 hours. “We would miss out on a lot of contracts if we weren’t able to weld in this way,” added Mr Mack.

EWM AG – Germany Fax: +49 2680 181 244

Email: info@ewm-group.com Website: www.ewm-group.com

For ty seven bends in 140 seconds THE production of lines for braking systems, air conditioning units and similar devices with a length of 1,500mm and diameters of as little as 18mm represents a challenge when it comes to bending technology, specifically with regard to handling. To be economical, production processes also need to be swift, and precision and quality are factors that are just as important. As part of a recent project the team at transfluid developed a tube processing system that involves robot handling of the material and that can bend tubing in lengths of up to 4,500mm – 47 bends in a time of around 140 seconds. Another specification that the team had to meet when developing the solution

was that the tubing would be already shaped or fitted with flanges. The process involves inserting into a feeder a bundle of tubes, which are then individually orientated by symmetrical rotation according to the positioning of the flanges. Each tube is then picked up by one of the two robots, which transfers it to a moveable spanning device with an appropriate high retaining system designed for longer tubing. The spanning device allows the robots to process the tubes on one or even on two sides in parallel. This also speeds up the procedure. The time required for processing each tube, even at this length, is constantly less than three seconds. Both robots have seven axes with drive systems, and can bend right/left. Another advantage of this tube bending concept is that isometric data can be uploaded directly online from a CAD system. transfluid Maschinenbau GmbH – Germany

The combination of a tube bending system with robot handling allows tubes with a length of up to 4,500mm to be processed

Email: sales@transfluid.de Website: www.transfluid.de

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J uly 2016