TPT-January-2015

Welding technology

Upgraded portable welding KEMPPI has upgraded the Minarc Evo equipment range. Minarc Evo 180 delivers more welding power than its predecessor, the Minarc Evo 150, but retains its qualities, serving ‘welders on the move’. (market dependent) the Minarc Evo 180 still delivers 140 amps MMA welding power at 28 per cent duty cycle.

and Lift TIG ignition as standard. Precise arc ignition, large voltage reserves and automatic arc dynamics control make it suitable for welding with all electrode types. The Minarc Evo range offers a choice of MMA, MIG/MAG, and DC TIG welding equipment that is easy to use and light to carry. The units include Kemppi’s 2+ warranty cover.

Minarc Evo 180 includes power factor correction (PFC) technology, giving energy efficiency and maximum welding power in any 1-phase, 230V, 16A or 10A industrial power network. It can also be used with generator power supply, even with extra-long extension cables more than 100m long. These qualities and its light weight make it easy to use in many welding jobs, in a wide variety of places. A large LED meter display is included, with a remote current control option,

The new Minarc Evo 180 has the necessary power for MMA maintenance welding, even where 4mm electrodes are required. The portable 5.8kg machine delivers 170 amps maximum output current for MMA welding at 30 per cent duty cycle, and 180 amps for DC TIG welding at 35 per cent duty cycle. When fitted with a 10-amp power supply plug

Kemppi (UK) Ltd – UK Fax: +44 845 6444202 Email: sales.uk@kemppi.com Website: www.kemppi.com Laser welding opens new avenues for process optimisation

can subsequently be left in the final product, or may need to be cut out. This optimisation potential has remained untapped, since no suitable welding method for joining the ends of thin metal strips has been available to meet these requirements. THE Machines offers solutions for cross-welding with the SLT range of machines. The series covers a bandwidth as standard from 80 to 750mm, with higher bandwidths available on request. Laser welding is particularly suitable for processing thin sheets where other methods would fail. The welding is conducted in fully automated process steps. Depending on the materials and thicknesses, pre-programmed welding parameters ensure high, repeatable quality. The tensile strength and elongation at the seam are generally ≥85 per cent of the base material. The LSL range of longitudinal laser welding equipment is available in the machine types 12, 40, 65 and 110 for composite tube diameters up to 12mm, 40mm, 65mm and 110mm, and 12mm for precision formed and welded tubular metal structures containing optical fibres such as those used in OPGW, OPPC, FIST and other fibre optic applications. An integrated optical seam tracking system allows high process speeds, and each LSL is suitable for the welding of stainless steel or other alloys. The quality of the entire seam integrity and

THE Machines, Switzerland, has several decades of experience in the manufacture of extrusion lines for drip irrigation pipe and tube systems, as well as expertise in the field of transverse and longitudinal laser welding of flat sheet and tubular formed metals and multi-layer metal polymer combinations. Supply issues and unavailability of helium, an essential forming gas in the TIG welding process, is causing concern and giving problems to a number of industries engaged in metal welding of sheet and tube, and multi- layer pipe manufacturers. With the expectation that the supply situation will be further aggravated in years to come, THE Machines has continued to drive forward in the field of protection-gas- free laser welding. The traditional processing of metal tape in the thickness range of 0.05 to 1.2mm in metal forming and stamping plants is still discontinuous. This means that a coil change mandates not only a machine stop, but also a time-consuming setup procedure each time when re-threading the new tape. This interruption of production could be reduced by combining the end of the tape with the incoming strip of the new coil in such a way that the weld and seam meet the rigorous requirements of the subsequent process steps, eg line tensions, repeated bending, forming and heat treatment, securely and at full production speed. The actual seam

The SLT range

full weld depth and volume is checked using latest multi-channel remote field eddy current testing. The system uses non-destructive testing and in-line inspection of the weld seams with high sensitivity to detect small and hidden defects.

THE Machines Yvonand SA – Switzerland Email: info@the-machines.ch Website: www.the-machines.ch

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J anuary 2015