Mannesmann Machine - Used Tube Mill, Pipe Mill, Tube straightener made by Mannesmann


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Mannesmann
Mannesmannröhren-Werke AG
Wiesenstrasse 36
45473 Mülheim a.d. Ruhr
Germany


Phone: +49 (0) 208 458-01        Fax: +49 (0) 208 458-1999
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Once part of the Vodafone Group, this company 'tubes' sector, which consisted of Mannesmannröhren-Werke AG and its subsidiaries and affiliated companies, was sold by Vodafone to Salzgitter AG. Mannesmannröhren-Werke AG now manages the "Tubes" division in the Salzgitter Group. They are the only subsidiaries from the former Mannesmann Group still carrying part of the original company name. In 1886, the founders of the company, Reinhard and Max Mannesmann, invented the original process for seamless steel tube manufacture. Today, the holding company Salzgitter Group owns Mannesmannröhren-Werke and produces seamless and welded steel tube and pipe at 38 production sites in 13 countries. The Mannesmann seamless tube-making process is a based on cross-roll piercing which, for decades, was used in combination with pilger rolling. Both rolling techniques were invented by the brothers Reinhard and Max towards the end of the 19th century. In the pilger rolling stand, a pair of conical-shaped rolls – one arranged above the other – operates in the opposite direction to the material flow. The thick-walled hollow body, with a cylindrical mandrel inside it, is guided towards the pilger rolls. As soon as it is gripped by the tapered portion of the work pass, a small material wave is sheared off the hollow. This wave is forged to the desired wall thickness on the pilger mandrel by the smoothing portion of the work pass, with the hollow body plus mandrel moving backwards in the same direction as the rolls are rotating – i.e. in the opposite direction to the rolling – until they reach the idler pass of the rolls and are released. As the hollow is rotated it is once again pushed forward between the rolls, and a new rolling cycle begins. The six Krauss-Maffei companies are involved in industrial equipment and process technology and provide expertise in a variety of engineering disciplines. Krauss-Maffei companies manufacture plastics machinery, design and build equipment for the process industries and manufacture machinery which uses laser technology. The company has announced it will merge all of its plastics machinery operations under Mannesmann Plastics Machinery; in the US, Van Dorn Demag, Krauss-Maffei and Netstal Machinery will move to the new group. Mannesman has produced the following types of equipment: Tupe Mills Pipe Mills Tube straightener De-Oiling Unit Continuous-cast products Induction-bent pipe Large-diameter pipe Line pipe Lubrication engineering Plastic tube and pipe Precision steel tubes Ring-shaped products Special steel production Stainless steel tubes Steel line pipe Steel tubes in carbon and alloyed steels Steel tubes in commercial grades Structural hollow sections Tubes in special materials
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