LONG PRODUCTS BULLETIN - SMS Meer GmbH

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Commissioning Upgrading the mill train at Hoesch Schwerter Profile GmbH, Germany, was a special challenge for both the operator and the machine builder SMS Meer. What made this job so special was the three-stage modernization concept, enabling shutdown periods to be minimized to the greatest possible extent and ongoing production of the mill between short shutdown periods. Ambitious goals. In August 2007, Hoesch Schwerter Profile GmbH, a member of Calvi Holding, Italy, had commissioned SMS Meer to upgrade the mill train for special sections. The goal was to increase the availability, the yield and the flexibility as well as to improve the quality of the finished products. New CS® mill stands. The modernization concept perfectly tailored to customer’s demands comprised an exchange of the existing universal and two-high mill stands with the CS® mill stands (Compact Stands) developed by SMS Meer. These stands offer automatic quick changing for an increase in flexibility and a reduction of setup times as well as a compact design, very high stand rigidity and high adjusting accuracy. Key assembly groups such as the adjusting equipment could be standardized for all stand types. Customized mill stand solution. The CS® concept enables a high flexibility and is optimally suited for the requirements when rolling special sections. For this customized mill stand solution it was considered that the existing rolls and guides could be re-used. As a result, the special section mill became notably efficient. In total, four universal and four two-high stands as well as one edger were supplied and an existing edger was upgraded. The four universal stands were pre-assembled in our workshop and the complete stand piping was mounted. 28 Newsletter 1/2010 Long-product Mills ”Just like an open-heart surgery” Hoesch Schwerter Profile: Modernization in three steps Universal stand pre-assembled in the Mönchengladbach workshop. Extensive ancillary facilities. Likewise modernized were descaling and centering devices as well as grip-type tilters ensuring optimal conditions of the rolled material when special sections are rolled. Our scope of supply included also the mill stand changing devices and the assembly area in a new pre-assembly workshop for stands and the required supply systems as well as the electrical equipment and the automation for the new facilities. The IBA- Logic system in version 4 was applied first for the whole control. The implementation was realized by Fest, our electrical equipment partner, on our behalf.
The new pre-assembly bay. Component installation. Foundation and media platform construction. Pre-assembled universal stand in the workshop. The three upgrading stages. The threestage modernization concept consisted of the following stages: Stage 1: It mainly comprised the preparation of the foundations, the installation of new stand bedplates, the media facilities and the assembly of the media platform for the accommodation of the valve stands, the local control pulpits, the electric cabinets and the cables and piping and eventually the resumption of production with the existing mill stands. Stage 2: Installation of new stand changing devices and assembly area. Assembly and resumption of production with new and existing stands on place P2 and the edger. Stage 3: Installation of the new centering and descaling devices and the grip-type tilters as well as the completion of place P3. Resumption of production with the new stands P2, edger, P3 in tandem rolling operation. After the completion of stage 3 the mill train has been put back into operation in fall. The tandem rolling operation was realized shortly afterwards. On October 12, 2009, a 16-week trial operation with optimization phase finally started. Such complex modernization steps executed in an extremely confined space require a high degree of professionalism and cooperation of the project teams from Hoesch Schwerter Profile GmbH and SMS Meer. With this upgrading measure the company in Schwerte, Germany, has further expanded its leading position in the production field of special sections. Rolls with new mill stands. Newsletter 1/2010 29
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Page 51 and 52: New order Capacity: 1 million t of
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Page 55 and 56: Revamp with just minor production l
Page 57 and 58: Higher yield and closer length tole
Page 59 and 60: Universal rolling in the compact st

LONG PRODUCTS BULLETIN - SMS Meer GmbH

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