TPT May 2011

T echnology U pdate

results, wedge quality for welding and tube surface quality. Aligned with the needs of further process steps Rosendahl supplies solutions for tape handling, tape cleaning, cross cutting and welding, tape accumulation and tape edge preparation for tape widths from 15 to 3,200mm and wall thicknesses from 0.1 to 20mm. Different applications require a specific kind of forming principle used in the tape forming process. Rosendahl offers static forming by using non-movable toolings, roll forming by using rotating toolings, hybrid forming for large tube diameter to wall thickness ratios and cage forming systems for pipe production up to 1,024mm. Besides the forming principle for the production of longitudinally welded tubes, an exact preparation and guiding of the tape edges is required. Rosendahl secures this preciseness by considering material properties, the design of the forming stations and forming tools. Different materials and applications require different welding technologies. With regard to economic efficiency, Rosendahl mainly provides solutions with TIG, plasma and laser welding technologies. The method used in the welding process Rosendahl evaluates the potential influences on the metallurgical structure, hardness value of the welding seam, corrosion resistance of the material, shape and formability of the welding seam, ability for continuous operation and welding speed. Standards and applications recommend cold working of the welding seam for a lot of tube applications. In many cases the goal is to get a smooth and plain outer surface and inside root of the welding seam like for hygienic tubes. The single most important aspect in this context is the influence of the welding seam microstructure due to cold working during bead rolling, heat treatment and final calibration. For this purpose Rosendahl offers inline bead rolling equipment for line speeds up to 12m/min and working pressure up to 200 bar for TIG and laser welding mills. Rosendahl inline tube heating systems are applicable for full body annealing of smooth and corrugated tubes and also for particular heat treatment of welding seams. Induction coil support, containment of the annealing and cooling section, protection gas management unit and water cooling system belong to the in-house engineered and manufactured Rosendahl annealing system. This provides the opportunity for serving adequate heat treating solutions for different materials and tube sizes like bright and black annealing.

To reach dimensional accuracy and product properties in special applications Rosendahl offers static and dynamic tube calibration. This comprises solutions for inline cold drawing for instrumentation tubing, driven turks head systems for heavy walled tubing and multi step roller based tube calibration for heat exchanger tubing. Corrugated tubes combine mechanic stability and bending flexibility. The corrugation profile significantly influences the product characteristics. Depending

on the demand Rosendahl offers efficient solutions for the tube production. The Rosendahl product range is supplemented by adequate auxiliary down stream equipment including solutions for metal tape handling and preparation, tube coiling and cutting and much more in order to support customised solutions. Rosendahl Maschinen GmbH – Austria Fax: +43 3113 5100 59 Email: office@rosendahlaustria.com Website: www.rosendahlaustria.com

Induction Heating Solutions

• Seam Annealing • Upsetting • Heat, Quench, & Temper • Normalizing • Stress Relieving • Coating & Galvanizing • Special Applications

With over 45 years of excellence, Pillar is your partner for induction heating solutions.

Induction O.E.M. for

Pillar Induction 21905 Gateway Road Brookfield, WI 53045 800-558-7733 www.pillar.com

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M ay 2011

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