The boom is an important part of the crane, which has a great effect on the lifting of goods. It is lifted by the function of the boom. If the boom is deformed, it will be a great threat to the safety of the port crane. The deformation of the lifting boom can be repaired by welding to meet the relevant technical requirements.
The crane boom is the main load-bearing component, and it needs to be replaced or repaired to operate after deformation, but it is not cost-effective to replace the new boom. The purchase price of the new boom is high, the transportation is inconvenient, and the delay is long. In order to save cost and time, welding can be repaired according to the actual situation on site. After the boom is repaired, it needs to reach the technical parameter requirements of the crane. Therefore, it is very important to choose a reasonable repair technique.
Material selection
If you want to repair, you need to clarify the shape and material of the deformed boom, generally rectangular, pentagonal and polygonal, and the material selection of the boom must meet the requirements of the crane’s bending strength index.
Preparation before welding
The deformed parts should be processed and sorted before welding. After disassembling the deformed boom, use a gas cutting machine to cut the deformed part of the groove plate and web. The cut part is shown on the right, and the remaining part of the boom is polished. ,Remove the exterior paint and all kinds of stolen goods, put the already cut boom on the hydraulic machine for shaping, straightening, and fixing it on the platform with clips.
Selection of welding technology
When welding, ensure the penetration and easy processing. Because the thickness of the material is greater than 6mm, the groove should be opened with manual arc welding for flexible and convenient application. Mainly butt welding, using manual arc welding, the welding method is single-sided welding and double-sided forming.
The crane boom is the main load-bearing component, and it needs to be replaced or repaired to operate after deformation, but it is not cost-effective to replace the new boom. The purchase price of the new boom is high, the transportation is inconvenient, and the delay is long. In order to save cost and time, welding can be repaired according to the actual situation on site. After the boom is repaired, it needs to reach the technical parameter requirements of the crane. Therefore, it is very important to choose a reasonable repair technique.
Material selection
If you want to repair, you need to clarify the shape and material of the deformed boom, generally rectangular, pentagonal and polygonal, and the material selection of the boom must meet the requirements of the crane’s bending strength index.
Preparation before welding
The deformed parts should be processed and sorted before welding. After disassembling the deformed boom, use a gas cutting machine to cut the deformed part of the groove plate and web. The cut part is shown on the right, and the remaining part of the boom is polished. ,Remove the exterior paint and all kinds of stolen goods, put the already cut boom on the hydraulic machine for shaping, straightening, and fixing it on the platform with clips.
Selection of welding technology
When welding, ensure the penetration and easy processing. Because the thickness of the material is greater than 6mm, the groove should be opened with manual arc welding for flexible and convenient application. Mainly butt welding, using manual arc welding, the welding method is single-sided welding and double-sided forming.
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