Overhead crane camber deformation are resulted from various reasons, generally involved with the crane design, manufacturing, transporting, installation and usage, etc.
1) Unreasonable design.
It is the inborn problem of the crane which could be avoided with the professional overhead crane manufacturers.
2) Internal Residual Stress.
During crane girder fabrication, the spot heat produced will result in metal shrinkage and the internal residual stress produced will cause the deformation of the overhead crane girder.
3) Crane girder camber formation.
The formation of the crane girder camber may result in the loss of the girder camber, which can be minimized due to the development of the technology.
4) Crane overload.
Overhead crane load exceeds the rated capacity will result in the girder deformation and the possible crane accidents.
5) Mis-operation of overhead crane.
Girder camber deformation also may be caused by the mal-operation of overhead crane, such as, the lifting loads suddenly without straining the wire rope, sudden braking, vastly braking, suddenly braking heavy loads vertically, etc.
6) Web plate deformation.
The web plate is the main supporting part of the crane girder. Usually, the web plate deformation casts little influence to the deformation of crane girder camber however when the web plat deformation becomes larger and the influence to the camber will get larger which will eventually get the camber deformed.
7) High temperature.
Huge amount of heat radiation will cause the temperature difference between the upper and lower plates of the crane girder, and the lower plate will get expanded and resulting in camber loss.
8) Incorrect storage, transporting, lifting, and installation.
Overhead crane girder is the long thin metal part with large internal Residual Stress inside which is vulnerable to the damage. Therefore the improper storage, transporting, lifting, and installation will cause the overhead crane camber deformation.
9) Improper maintenances.
During maintenance, the heat produced by cutting and welding on crane girder will result in the crane girder camber deformation.
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