Now crane equipment is a relatively common equipment for loading, unloading and handling. Crane equipment is used when manpower cannot handle it. That is to say, cranes are a good helper for people and are very important in work and life and promote the development of the national economy. Port cranes promote economic trade in ports, and sometimes require reinforcement to extend service life and improve safety performance.
Reinforcement plan
The chassis is a beam structure, which is mainly subjected to bending stress, and the stress is concentrated at the position where the distal end of the leg is combined with the center rotation, and the cross section of the chassis is a box structure. According to these actual conditions and combined with the construction requirements, we decided to use the opposite vertical slabs and horizontal slabs to reinforce the slabs, and to weld the two slabs with a diagonally-stayed slab into one body. In this way, the three slabs form a stable The tripod structure, through theoretical calculations, has increased its strength by more than 15%, which meets actual requirements.
Material quality
The material is close to that of the crane to ensure the welding effect, and the performance of the material must meet the strength requirements. After selecting the material, the base material and the new material were sampled separately and then welded together to conduct a destruction test. The result was that the base material was broken, indicating that the strength of the new material and the welded part was greater than the base material, ensuring the construction quality and strength requirements.
Welding process
It mainly requires six aspects including cleaning and preheating, welding rod drying, processing reinforcement plate, welding machine, welding construction procedure and post-welding heat preservation, so as to ensure the construction quality.
Strength test
Check whether the welded parts have missing welding and burn-through phenomena, and whether they meet the requirements of use. After the reinforcement is completed, the structural parts must be inspected to determine the percentage increase in the strength of the chassis structural parts, and then compared with the actual requirement of 15%, so as to conclude whether the construction is qualified.
Reinforcement plan
The chassis is a beam structure, which is mainly subjected to bending stress, and the stress is concentrated at the position where the distal end of the leg is combined with the center rotation, and the cross section of the chassis is a box structure. According to these actual conditions and combined with the construction requirements, we decided to use the opposite vertical slabs and horizontal slabs to reinforce the slabs, and to weld the two slabs with a diagonally-stayed slab into one body. In this way, the three slabs form a stable The tripod structure, through theoretical calculations, has increased its strength by more than 15%, which meets actual requirements.
Material quality
The material is close to that of the crane to ensure the welding effect, and the performance of the material must meet the strength requirements. After selecting the material, the base material and the new material were sampled separately and then welded together to conduct a destruction test. The result was that the base material was broken, indicating that the strength of the new material and the welded part was greater than the base material, ensuring the construction quality and strength requirements.
Welding process
It mainly requires six aspects including cleaning and preheating, welding rod drying, processing reinforcement plate, welding machine, welding construction procedure and post-welding heat preservation, so as to ensure the construction quality.
Strength test
Check whether the welded parts have missing welding and burn-through phenomena, and whether they meet the requirements of use. After the reinforcement is completed, the structural parts must be inspected to determine the percentage increase in the strength of the chassis structural parts, and then compared with the actual requirement of 15%, so as to conclude whether the construction is qualified.
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