The formulation of the problem in Design this final project are:
In every modern industry as it is today, it is very necessary to have the right material handling crane equipment. In order for the material to be lifted to remain good, safe in the process of loading and unloading faster, it is necessary to have a heavy crane equipment with a larger capacity and can reach the entire area.
How to design a single girder Overhead Crane with a lifting capacity of 10 tons?
In this design, the overhead crane will be placed in a manufacturing workshop. This material transfer machine as a support for vertical loads that can lift objects or goods with a hoist, that is installed in a hanging position on a girder that moves horizontally and the girder can also move back and forth according to existing needs. From the results of this review, the weihua crane chose the Single Girder Overhead Crane with a lifting capacity of 10 tons as the material transfer machine to be designed.
Design Benefits
The benefits of Design this final project are:
The weihua crane is able to design a material transfer machine such as a single girder Overhead Crane
The weihua crane can apply the theories of material transfer machine design obtained in college and in the future can apply these theories in the world of work.
Because in the design of this lifting equipment there are several problems, it is necessary to limit the problem. The following are the problem limitations of the single girder Overhead Crane design:
Does not discuss the connection to the crane structure, transmission, gripping equipment, speeder.
Not discussing cost calculations
Not discussing the age of the single girder Overhead Crane
To get the design results of a single girder Overhead Crane with a capacity of 10 tons.
In designing this single girder Overhead Crane, the weihua crane takes some specification data which will then be used as a reference in performing calculations. For the design of this single girder Overhead Crane, several specifications are obtained, namely:
- Girder Length: 20,000 mm
- Crane lift height: 8,000 mm
- Lifting speed : 0.2 m/s
The overhead crane that will be designed uses a single girder, with a box-shaped girder construction. This girder is a component that will withstand the weight of the load, the weight of the lifting mechanism.
The overhead crane moves with the movement of lifting and lowering the load which is regulated by the work of an electromotor which functions to rotate the drum which will roll the steel rope. This steel rope will move the pulley so that the pulley house which has a hook at the end will move up and down, the load to be moved is hung on the hook. When the position is in accordance with the desired, the drum movement will be stopped by the operator by pulling the lever (handle) connected to the brake. While the traveling movement is carried out through the transmission gears. In this case the motor rotates the road wheels in the desired direction (forward or backward) and after the desired distance is reached, the electric current will be cut off and the brakes will work at the same time.
From the specifications of the length and height of the Overhead Crane above, the weihua crane describes the concept of an Overhead Crane which can be seen in the image below.
where the type of box arrangement is a built up frame member, then each plate arrangement on the box girder must use a welded joint.
End Carriage movement is done through the transmission gears. In this case the motor rotates the road wheel in the desired direction (forward or backward) and after the desired distance is reached, the electric current will be cut off and the brakes work at the same time.