Strandguide Roller Preconfigured products for precision applications Metals Technologies
STAR roller family Solutions for every application. The challenge: The hot and humid environment of a continuous casting plant makes the refurbishment of strandguide rollers inevitable after a certain length of time. The corrosive atmosphere caused by the mixture of water and casting powder combined with continuous mechanical and thermal load eventually makes the replacement of the strandguide rollers unavoidable. Even the best technology and a high degree of operational experience absolutely eliminates the possibility of extreme situations like a break-through. This requires a reliable and experienced technological service provider. Our solution: The STAR rollers developed at Siemens VAI ideally support the continuous cast steel strand in the segment. Whether you are looking for a solution to optimize your costs, or want to update to the absolute state of the art in strandguide rollers technology: Siemens VAI can offer an answer to all of your requirements. Our wide range of application optimized roller concepts, ranging from our Micro- STAR rollers, for optimal performance as foot or bender roller, to our DRI-STAR roller, for high quality dry casting, allows you to easily find the perfect fit to your specific demands. Our STAR roller family Micro-STAR Bend-STAR CSR / PDR ECO-STAR / ECO-DRI-STAR DRI-STAR I-STAR
Good reasons for Siemens VAI strandguide roller: Optimization of your operation and maintenance model by flexible and individual roller type selection Full interchangeability of strandguide rollers from the STAR roller family by the Siemens VAI STAR roller concept Availability of predefined ready-made STAR roller combinations which reduces delivery time and maintenance costs Customized STAR rollers arrangement according to meet your specific requirements
Siemens VAI STAR roller concept Process-integrated know-how from the market leader CSR I-STAR ECO-STAR Siemens VAI strandguide roller concept Siemens VAI STAR roller jackets The name Siemens VAI stands for leadership in innovation. Our innovations are directly relevant to the market, and continuous further development of our strandguide roller concept ensures optimum production reliability. After all, we not only know which technologies you require as plant operator, but which product qualities are required and expected from your customers. CSR The CSR (compact split roller) consists of two or more separate rollers with two roller bearings each. The two or more separate rollers are aligned in the lateral direction in the segment of the strand to form a single compact split roller. I-STAR The I-STAR (intermediately supported transaxle roller) consists of three or more roller bodies and four or more bearing blocks, which are based upon a pass-through axle. The advantage of this design is the small unsupported strand width which helps to reduce strand bulging. ECO-STAR The patented ECO-STAR roller is the newest development of Siemens VAI and integrates all of the experience and knowledge of the world s number one in slab casters. It consists of three or more roller barrels and four or more roller bearings which are mounted on four or more roller stumps. Its no-frills design makes manufacturing of the rollers rather quick and therefore significantly reduces delivery time. In combination with the Siemens VAI ECO-STAR maintenance concept, the Siemens VAI ECO-STAR strandguide roller is a forward-looking roller package. Siemens VAI caster facts: 20,000 STAR rollers are installed worldwide 300,000,000 tons of slabs are produced on STAR roller technology up to now Up to the present time approx. 100,000 km of slabs have been cast using STAR roller technology This equals 10 times the length of the Transsibirian Railway or more than two times around the earth starting from your caster
SMART segment arrangement Refurbishment cladding of rollers Spare parts and components Global organization, workshops provided with state-of-the-art, and our engineering, operating and maintenance know-how make us a reliable partner for your specific requirements for spare rollers, roller jackets, bearing blocks and all other roller components. Global logistics expertise Call&OrderService technological background short response time excellent price/quality ratio reliable delivery times Upgrading to DRY casting The installation of STAR rollers which can cast without secondary cooling water requires modifications to the machine cooling and segment heat protection concept. Siemens VAI s experts have the specific know-how to update your continuous casting machines to dry casting. Offline maintenance For the past 20 years Siemens VAI has provided services to refurbish caster molds, caster segments and caster strand rollers for both Siemens VAI and non- Siemens VAI casters. Continuous improvement of quality has led to an ever increasing service life of the caster components. The Siemens VAI group operates workshops globally, providing refurbishment services to many customers. This wide network of maintenance shops makes it possible to reach our customers with a minimum of logistic effort and time.
STAR roller product range Meeting individual demands VAI Micro-STAR roller Foot roller Intermediately supported roller with fixed axle, wear-resistant surface and innovative grooved design. A compact and sturdy roller for a long lifetime. Bender roller Intermediately supported roller with fixed axle designed to provide an excellent strand shell support and high availability. Buldging sensitive steel grades Thin slab casting High productivity caster Bend-STAR roller with peripherally water cooled roller bodies. The peripherally cooled roller bodies of the Bend-STAR allow partial dry casting in the area of the slab corners in the bender segment (segment 0). The Bend-STAR is modularly designed according to the ECO-STAR principle. This helps to significantly reduce delivery time and maintenance costs. Crack sensitive steel grades Soft reduction Optimized maintenance concept ECO-STAR roller with water cooled axle & bearing block. The ECO-STAR roller combines proven advantages of the I-STAR roller with an absolutely optimized design. Soft reduction Optimized maintenance concept ECO-DRI-STAR roller with peripherally water cooled roller bodies. The ECO-DRI-STAR roller combines the proven advantages of the ECO-STAR roller with cooling by revolver bores, which are regularly spaced near the surface along the circumference. Soft reduction Dry casting Crack sensitive steel grades Optimized maintenance concept
I-STAR roller with water cooled axle & bearing block. The ideal strand guiding roller is a champion in interaction with a secondary cooling or external machine cooling from the casting bow to the horizontal casting area. Soft reduction DRI-STAR roller with peripherally water cooled roller jackets. The DRI-STAR roller combines proven advantages of revolver rollers with the advantages of the I-STAR roller. The cooling water is guided through revolver bores which are regularly spaced near the surface along the circumference. This ensures improved heat dissipation from the surface of the roller. Soft reduction Dry casting Crack sensitive steel grades CSR (compact split roller) The compact split roller design is the standard solution for casters with a product mix of "non-critical" steel grades. The CSR concept is sufficient for casters with fewer unexpected loads (e.g. Tundish exchange) and low additional forces (e.g. soft reduction). Non critical steel prados PDR (peripherally drilled roller) PDR rollers are split rollers with a peripheral cooling system. Their mechanical properties are the same as the CSR roller. The PDR system is a solution for casters with few unexpected/additional loads with a problematic secondary cooling system (insufficient cooling water quality, clogged nozzles) Dry casting Wear optimized
For further information, please contact: Siemens VAI Metals Technologies GmbH & Co P.O. Box 4, Turmstr. 44 4031 Linz, Austria Phone: +43 (0)732 6592-0 E-mail: service.metals@siemens.com The information provided in this brochure contains merely general descriptions or characteristics of performance which in actual case of use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract. Order No.: E10001-M2-A3-V2-7600 Printed in Austria Dispo No.: 21661 K-No.: 28102 SPS SVAI-06-00340 WS 05071. Subject to change without prior notice Siemens AG 2007. All rights reserved. www.siemens-vai.com