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Overhead crane maintenance and welding

In the current industrial production, overhead cranes play a pivotal role and can bring great convenience to people's industrial and other production activities. In the use of overhead cranes, various moving parts will inevitably undergo wear, loose joints, and corrosion of metal structures, which will cause the crane's technical, economic and safety functions to decline to varying degrees. Therefore, in order to prevent and eliminate hidden dangers and ensure that the crane is always in an outstanding condition, the crane should be maintained and maintained before the wear of the crane parts has reached the level that affects the failure of the crane. So, the longer the use of the overhead crane, the longer the purchase of new machines to cut costs. 

Maintenance of overhead crane

(1)Ensure that cranes often have outstanding skills and functions, make each organization work normally and reliably, and improve their integrity rate, utilization rate and other management goals;

(2) Strengthen the maintenance of structural parts, insist on reliable connection, normal action and function of electro-hydraulic components, prevent abnormal vibration due to electromechanical elements, and satisfy the normal use requirements of cranes;

(3)Ensure the safe use of cranes;

(4) Relevant environmental protection standards in line with the country and some regulations;

(5) Reasonably and effectively extend the service life of the crane. Through the maintenance of the crane, the repair interval of the crane or organization is effectively extended, including the overhaul period, and then the service life of the crane is extended.

In fact, generally speaking, the service life of overhead cranes is related to many factors, and the standardization of use and normal maintenance also have a very important influence on the service life of double girder cranes.

During the use of the overhead crane, it should be carried out in accordance with the corresponding operating specifications and requirements, and the corresponding safety rules should be observed. During the entire use of the overhead crane, no random operation or illegal operations, such as the requirements on the load, and The requirements for use in different environments are different.

In addition, if the overhead crane is to be used longer, the necessary maintenance is very important, because the performance and quality of the crane are usually affected to a certain extent after a certain period of time. This requires us to perform reasonable maintenance on the whole machine. Good care of the basic surface and internal structure ensures that the overhead crane maintenance will be done well after different operations.

For customers, the longer the use of overhead cranes, the lower the overall cost, which can effectively save users' costs.


overhead crane maintenance

Welding of overhead crane

The overhead crane is a lifting equipment that is horizontally framed over the workshop, warehouse and material yard for material lifting. Because its two ends are located on tall concrete pillars or metal supports, it looks like a bridge. Overhead cranes are widely used in engineering and production, but many problems will occur during use.

During the maintenance process, the welding deformation of the overhead crane was found, and the control of the deformation became an urgent problem to be solved. Because the cross-sectional shape of the overhead crane is a typical box girder structure, it has many welding seams, complex structure, and large welding stress and deformation. If a reasonable design and construction process plan is not adopted, deformation will occur during the welding process, which will seriously affect the welding quality and even cause the structure to be unable to be installed and used correctly.


overhead crane girder welding

The most important thing to control welding deformation is to fully understand the cause of the deformation, which is conducive to taking the most appropriate measures according to the specific situation to reduce the degree of welding deformation to the minimum, so that the structure can be used correctly and reasonably, and better Improve various performances of overhead cranes to provide guarantee for better construction.

Under normal circumstances, the main reason for the welding deformation of the overhead crane is the uneven heat input. The amount of heat input is closely related to the material and structure of the welding. Material factors and structural factors affect the movement of the metal around the heat source, causing it to be affected by both internal and external binding forces, resulting in welding materials. Stress deformation.

Welding deformation mainly includes shrinkage deformation (longitudinal shrinkage and lateral shrinkage), bending deformation, angular deformation, wave deformation, twisting deformation and other types. It is reflected in the external structure of the overhead crane that shows local uplift, distortion, bending and distortion.

There are many reasons for these problems during the welding process. For example, the size of the weld seam is not accurate enough, the number of weld seams does not meet the predetermined standard, the welding position and the design position have large errors, and the welding material The thermophysical properties of the steel are not strong, the construction process is not conducive to achieving the best welding state, the selection of welding parameters, etc., each specific link must be carefully grasped to achieve the desired effect.

As top three crane manufacuer in China, overhead cranes are our main product. If you have any overhead crane request and overhead crane maintenance questions, please don’t hesitate to contact to us. We can do the customized maintenance plan for the overhead crane we supplied.

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