23-09-2014, 04:39 PM
More than 50% of cranes in industry are projected to be operating beyond capacity. Cranes built 30 or more years ago are often inadequate to meet new process demands due to limited capacity or slow speeds. In Figure 101, the overhead crane lifts a 145 ton locomotive. This same crane is in use today, and the average locomotive weighs 205 tons. The crane is under higher stress and suffers more breakdowns. As a result, owners have considered new overhead cranes - the natural solution to high maintenance costs and excessive downtime due to overhead crane failure. But, modernization is emerging as a cost-effective and efficient alternative that increases the life of the overhead crane and, if needed, significantly increases load capacity. TRENDS. To maximize production efficiency, many overhead crane owners in the past have increased the amount of material in each load or increased the number of loads transported during each production interval. However, higher loadings and increased duty can put a tremendous strain on overhead cranes--especially those 25 to 30 years old-- which are usual
PROJECT DETAILS:
In bhushan power and steel plant raw material comes in the form of coils of steel and iron sheets. These coils comes in the plant with the help of Heavy transport vehicles (trucks). Here lifting crane is used to unload the coils from the Trucks. Lifting crane is not used only for this purpose. This is very important machine in the Bhushan plant. It is used to move the coils from one place to another. When the coil passed through one machine and its ready for the next operation then lifting crane forwards the coil to the next process station.
As for example , after unloaded from the truck coil first go to the H.R.Slitter machine. To place the coil on pay off stand of the H.R.Slitter is done with lifting crane. This process is occur in the same way for the next station at last of packaging and dispatch then loading of the finished good for the customers into the trucks.