TPT July 2009

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T echnology U pdate

Better gas flow with laser cutting system

Precitec, Germany, has developed new technology that significantly increases the gas flow rate through the cutting nozzle while keeping constant cutting gas pressure. In several cutting trials, the company has successfully combined ceramics and nozzles in its cutting system to achieve longer operating life and lower cost. The new KT B Con ceramic part and nozzles have no ‘hard edges’ and have a conical geometry. Thus the cutting gas pressure can be significantly reduced whilst giving the same cutting edge quality. In addition, there is a reduction of the input pressure directly on the processing head. Trials have shown that more accurate cuts can be produced efficiently with the laser. Productivity is better because an optimum process depends on gas flow. Minimum turbulence ensures little flow resistance, improves cut quality and reduces wear. Field tests with the new, considerably cheaper design have also shown an increased working range for the focal position. Dirt on the focusing lens and the associated focus shift can be detected with the larger process window and increase the operating life of the optics. In particular, CO 2 cutting heads without a protective window can lead to considerable cost advantages. Nick GmbH is one of the companies to have tested the new ceramic and nozzle combination on its laser cutting systems. The company processes aluminium, steel and stainless steel pipe, sheet metal, special profiles and standard parts for the office furniture industry, shop fitting and medical technology. Mr Philipp of Nick GmbH states, “We have noticed that the operating life has been longer in spite of signs of wear. This has led to better error tolerance when cutting and to a larger process window. We had to replace the parts earlier before. The new ones can be used longer and still give the same cutting quality.”

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Precitec KG – Germany Fax : +49 7225 684 900 Email : n.rahner@precitec.de Website : www.precitec.de

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20.05.2009 14:12:53 Uhr