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f+h Intralogistics 5/2015

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f+h Intralogistics 5/2015

CRANES & HOISTS Split

CRANES & HOISTS Split crane arrangement for layout freedom The special solution is based on a combination of overhead travelling and suspension cranes from the Demag Universal crane range, which is employed on the upper crane level (Image). While Demag EKKE single-girder overhead travelling cranes travel on a crane runway at a height of 8.6 m along the outside edges of the bay, suspension cranes operate in the middle of the bay. These cranes were specified as EKDE singlegirder suspension cranes that travel on girders which are suspended from the roof of the bay at a height of 10.71 m. The cranes “spilt” along the length of the building precisely cover the areas planned by Butting and, if required, they can operate independently of each other, which eliminates the need for a complete crane to serve the entire width of the building. “Since the crane runways are suspended at this point and do not need any additional crane runway supports, we can use the maximum space for other production operations”, underlines Kulow. “That creates the flexible structures that we wanted to achieve.” All of the eight cranes are rated for a load capacity of five tons and have a bridge length of 10,600 mm. They are each equipped with a DR-Pro travelling rope hoist. Radio control facilitates convenient control of the cranes from any position. Mario Reuser, Demag Sales Engineer, adds: “We developed this special hybrid solution on the basis of our comprehensive product portfolio and combined tried-andtested crane solutions. This meets Butting’s specification for maximum possible flexibility, by making the material flow operation largely independent of the production process.” The solution is reported to facilitate autonomous working teams that do not inhibit each other and a flexible response can be provided meet to production process requirements at any time. Combined design features Six EKKE Universal overhead travelling cranes that have optimized girder height dimensions, a span of 22.38 m and which are rated for loads up to five tons, operate on MULTIMEDIA CONTENT Internal video: learn more about the achievement spectrum of the enterprise the level below, where the crane runway rail is located at a height of 6,600 mm. Operating on the same crane runway are two further EKKE single-girder overhead travelling cranes. They each have a load capacity of 12.5 tons and can also operate in tandem to transport unusually heavy equipment or complete vessel assemblies weighing up to 25 tons within the building. The radio-controlled cranes are all equipped with DR-Pro rope hoists, which feature high lifting and cross-travel speeds and, therefore, provide for improved cycle times. Variable-speed long and cross-travel motions also facilitate gentle handling and precise positioning of the components. These features are not only kind to the crane system, but also reduce the loads transmitted to the crane runway and the entire building. Located at the edge of the building complex is a separate area which is used for surface treatment, the socalled pickling operation. This final step treats the stainless steel to restore its resistance to corrosion following the welding, annealing and bending operations. This process is usually performed with the help of a blend of acids, which consists of nitric and hydrofluoric acid. The two 5 ton overhead travelling cranes installed in this area, which have a span of 5,500 mm, are specially equipped with IP 65 enclosure and are correspondingly rated for operation in an aggressive environment. This level of protection particularly includes the central electric equipment, special paint finishes, the use of long-term preservatives and stainless steel parts. At Butting Anlagenbau in Schwedt, the machinery is currently being integrated into the new building to serve the production and assembly workplaces. The fact that the Demag cranes had already been installed is already paying off, as they are now being used to support the installation work. Photos: Terex MHPS A combination of overhead travelling and suspension cranes from the Demag Universal crane range. The cranes have load capacities ranging from five to 12.5 tons www.demagcranes.com 28 f+h Intralogistics 5/2015

CRANES & HOISTS CQcrane and Stahl CraneSystems supply 86 cranes with 120 wire rope hoists The economy is booming around the metropolises Chongqing and Chengdu in Western China. Apartments and shopping centres are now rising in the centre of the region, numerous companies are having to move from their locations in to the outskirts. This was also the case with the Chinese manufacturer of CNC machine tools. Stahl CraneSystems, Künzelsau/ Germany, received the order from Chongqing Crane Works (CQcrane), a local crane builder, to supply 120 hoists for a total of 86 cranes. The machine tool manufacturer’s new development is a milestone for the Chongqing region. This is the first project of this magnitude in which crane systems of western standard are being used. The significance of the order was underlined by the presence during order negotiations of a high political offical from the municipal administration. A number of Chinese and international crane builders had tendered for this order from the state mechanical engineering company. The company is regarded as one of the largest manufacturers of gear wheel production machines, has a market share of 60 percent in China and exports to nearly 50 countries. “What was crucial was ultimately not just the price, but the considerable additional benefit which we were able to offer the About Stahl CraneSystems Stahl CraneSystems GmbH, with head office in Künzelsau/Germany, has more than 120 years experience in crane construction. The manufacturer offers a full range of crane technology and crane components, including chain and rope hoists, winches, and light and small crane systems, as well as drive and control solutions. It is a world leader in explosion protected crane technology. Indeed, Stahl CraneSystems developed the first components for such applications as far back as 1926, thus contributing to today’s industrial standards. The company manufactures its products at the Künzelsau plant, but has 9 foreign subsidiaries. It has 700 employees worldwide. company with our mature products and professional technical support,” as Jürgen Klemke, Managing Director of the Stahl CraneSystems subsidiary in Shanghai, explains. “A Stahl CraneSystems employee was constantly on site to ensure trouble-free progress and close collaboration between all the partners. Experts from sales, mechanical and electrical engineering departments assisted CQcrane’s team on technical questions and helped process the order at the quality level customary in the West.” Reliable crane technology from Germany The mechanical engineering company took advantage of the relocation of its production plant to a new 1.7 km² site to the west of Chongqing to upgrade the crane technology. Where previously crane systems caused production downtimes more and more frequently, the company is now relying on topquality German products. To meet the customer’s explicit request, all the hoists were manufactured in Germany and then imported to China: 15 AS 7 wire rope hoists and 105 SH wire rope hoists are now in operation. On 35 crane bridges, a combination of wire rope hoists with high lifting capacities and auxiliary hoists with fast hoisting speeds are used on double rail crabs. The crane with the highest capacity has one 75 t and one 20 t wire rope hoist. This is the largest order for standard hoists Stahl CraneSystems has received in China up to the present. Installation and commissioning was carried out in three stages. “Thanks to efficient preparation on site and the project management in Shanghai and Künzelsau everything went smoothly. Once again we saw the advantages of an international and intercultural team of project managers working closely together,” Klemke said after the project had been completed. “CQcrane supplied all 86 crane systems on schedule by the end of 2014 and commissioned them without errors.” Stahl CraneSystems distributes its hoists and crane components through a global network of certified crane building partners. The Chinese market is served by the subsidiary in Shanghai – one of nine subsidiaries around the world. The 22-strong team in Shanghai collaborates at present with several crane building partners in the east of the country. Due to the great distances involved and the associated transport costs the partners are mainly active in the regions around their bases. Photo: Stahl CraneSystems www.stahlcranes.com f+h Intralogistics 5/2015 29

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