TPT January 2009

S traightening & F inishing M achinery

S traightening and finishing are critical functions of tube making on two counts: as important contributors to the quality of the product; and by virtue of their position in the production cycle. In a high-speed operation, problems are unwelcome at any time. In an industry in which profit turns on productivity, they are best discovered at the feedstock stage. As it happens, there are challenges enough at the end of the line. Expectations for finishing grow

continually, especially in the pharmaceutical and chemical processing industries that require a mirror finish on the interior of tubing.

 Bronx/Taylor-Wilson manufactures a range of 6 and 10 roll straightening machines (see page 72)

It is no longer sufficient for tube finishing methods to deliver a smooth, blemish-free surface with a high-gloss polish; they must also satisfy stringent government-mandated health, safety, and environmental concerns. Operations such as buffing may now require the installation of operator safety devices. Harder-to-grind metals call for customized polishing sequences

and belt lineups. Polishing the inside diameter of very long tubes is still a daunting assignment. As their customers’ requirements mount, so do the demands that tube makers place on themselves: for achieving perfect surfaces in fewer steps and in less time. The development of new machinery – for straightening, grinding, sanding, and polishing – keeps pace with both sets of clients.

 Ravni technology for a prime finish on steel, copper and stainless steel tube (page 80)

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J anuary 2009

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