Problems derivation and functionality enhancement of a double girder overhead crane for billet transmission: case study

Document Type : Research Paper


1 Department of Mechanical Engineering, Payame Noor University (PNU), P.O. Box. 19395-3697, Tehran, Iran

2 Engineering, research and technology unit, South Kaveh Steel (SKS) Company, Bandar Abbas, Iran.

3 Mechanical Engineering Department University of Payam Noor, 4697-19395, Tehran, Iran.


Double girder cranes are mostlyture or some specific parts of this crane go under Double girder cranes are mostly used for heavy loads. The steel structure or some specific parts of this crane go under extra load during the crane operation. The crane condition depends on many variables that change over time randomly. The current standards of Europe have not solved the effects of the forces on the fatigue damage. In this paper, reasons for the skewing of the crane from the main path, and wear of the wheels and rails of it, and the effect of the lateral and thermal forces on the double girder crane are presented. Experimental measurements and computer simulations are used for the analysis. The existence of symmetry in the crane design and operation period is very important. The carriage location influences the amount of force. The results show that for preventing movement difficulties in the rail and crane, it is recommended to cover the structure with the heat shield and insulation materials, especially those parts in exposure to the hot billet. Creating the expansion gap in rails of the crane needs to be obeyed according to the standards. Also, using the rail guide is very good to reduce the skewing of the crane. Furthermore, heat treatment and hardening of the  used for heavy loads. The steel strucwheels must be completely obeyed. 


Main Subjects

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