Deformation types and hazards of components of the

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Types and hazards of crane component deformation

component deformation is divided into two types: one is elastic deformation, the other is plastic deformation. When the load is small, the elongation is proportional to the load. The instruments and control systems used in process automation and factory automation belong to this category. They increase with the increase of the amount of filler, maintaining a linear relationship. At this time, if the applied external force is removed, the material will return to its original state. When this external force exists, the deformation is called elastic deformation; When the load is greater than the elastic limit load, and then unloaded, the elongation of the material can only be partially restored, while retaining part of the residual deformation. Alloy high carbon steel (or low carbon alloy steel), cold working die steel and other residues are plastic deformation that modern food packaging not only provides physical protection for food and its contents

The plastic deformation of the material changes the shape, position and size of the component. In lifting operation, the deformation of components cannot be ignored. If a certain component deforms, an accident may occur. This is because the strength and stiffness of the component can not meet the requirements when it bears external loads. For example, when the crane is overloaded, its lifting mass exceeds the designed bearing capacity of the equipment, and deformation will occur. Deformation not only affects the normal operation of the working mechanism, but also causes lifting accidents when the deformation is serious. Therefore, overload lifting is not allowed

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