PROJECT OF THE MONTH | DECEMBER 2022
Q Demag DC chain hoists in operation in an assembly area.
the sub-assemblies for assembly operations. The hoists also feature a gearbox, slipping clutch and brake that Demag says are maintenance-free for up to ten years.
The compatibility of Demag components with each other ensures the Kuhn MGM plant can use its existing chain hoists from older generations, such as the DK and PK chain hoists. Demag’s KBK light crane system
the cranes assist with the last assembly steps, making it possible to join the pre- assembled and heavier components. The other four ZVKE units are in
a newly built shipping area, to load packages of finished components and agricultural machinery onto trucks for worldwide distribution. On all nine cranes, a smart SafeControl
system monitors and ensures safe operation. Demag says the two-stage cut-off prevents the crane and the trolley from colliding with the limit stops. When the first limit switch is reached, the long-travel or cross-travel speed switches to creep speed. As soon as the second limit switch is reached, the long-travel or cross-travel drive is switched off, braking the travel motion gently. Load sway is prevented with a combination of continuously variable control and limit switches. Two of the ZVKE units operate on
a crane runway within the production section. An optical crane anti-collision system prevents collisions: dual laser sensors measure the distance between the corresponding cranes on the runway, and if previously defined minimum approach distances are exceeded, the relevant crane is shut down in two stages. In the first stage, the crane can only be moved at slow speed; in the second, the crane is switched off. With the Demag StatusBoard on the crane girder, operators can see
P Demag industrial drives and the company’s DMR rope hoists provide travel and lifting motions.
www.hoistmagazine.com | December 2022 | 9
the weight of the load on the hook. In addition, the StatusBoard displays the current operating statuses of the crane in real time. These include, for example, the load capacity, total load, overload, service information or the activated assistance and convenience features of the SafeControl system. The DC-Pro chain hoists have a
standard hook path of 5m and load capacities of up to 1,000kg when moved by hand and up to 2,000kg when moved electrically. Components can be moved with both drive methods at assembly stations. Articulated connections between the crane girders and trolleys enable pre-assembled sub-assemblies to be handled from the assembly station to the machine frame. The partially variable and low speeds of the chain hoists help crane operators to position
network extends along the assembly lines below the ceiling of the production facility. Employees move individual agricultural machinery components with KBK single-girder and double- girder cranes from the logistics line to the assembly stations at the production lines, which have a length of around 100m and an approximate width of 25m. “Demag products provide enormous
flexibility and make it possible to manufacture complex assemblies in small areas,” said Schissele. “The products have extremely long service lives. They can also withstand some serious loads, and have individual components that can be ordered even after 20 or 30 years without a problem. In addition to that, our need for optimal operating safety is something that Demag products meet to a ‘T’. We’re 100% satisfied with our solutions.” Overall, the Kuhn MGM assembly
plant was expanded by a total of around 20,000m2
, with around 11,000m2 new assembly facility, 5,500m2 for a shipping facility. ● for a for an
extension to the logistics facility, and 3,000m2
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