TPT November 2016

T E CHNOLOG Y

CNC end bevelling for complex geometries FOR decades, mechanical copying devices have been the standard for pipe end bevelling. However, this production method alone no longer meets the increasing quality requirements of the pipe industry. International standards such as the American Society of Mechanical Engineers (ASME) already call for more complex pipe end geometries than can be realised using mechanical copying devices. Graebener’s CNC pipe end bevelling machines

Graebener’s solution is a CNC- capable pipe end bevelling machine that can be operated with a mechanical copying device or with a CNC tool axis, depending on the respective requirement in one-side or two-side design. With the CNC-capable pipe end bevelling machine, Graebener has developed a ‘one for all’ technology for the optimum processing of carbon steels as well as stainless steels: mechanical copying and CNC copying in one machine, for all weld seam geometries. Traditional methods alone can fail due to the complexity of some

an optimum chamfer geometry. This is made possible by an electronic measuring system that records the pipe ovality to the centre over the entire pipe circumference. Deviations from the theoretical pipe centre can be displayed graphically. Graebener Maschinentechnik GmbH & Co KG – Germany Website: www.graebener-group.com

geometries and with thick-walled pipes. With accurate CNC control of the tool support, the Graebener machine allows the realisation of complex weld seam technologies, even for pipes with increased wall thickness. Relatively simple geometries can still be copied mechanically. The CNC pipe end bevelling machine automatically takes into account the ovality at the pipe ends, ensuring

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N OVEMBER 2016