With the continuous increase in the market share of gantry cranes and their wider application, crane repair problems, especially those related to the repair or reinforcement of structural parts, have attracted more attention. The cranes inspected by equipment supervision and inspection What elements are generally considered and how to solve the repair problem in the crane market? The following describes the relevant aspects.
The effect of the reinforcement of the mechanical parts is mainly determined by the reinforcement scheme, the quality of the selected material, the welding process and the strength inspection. In terms of reinforcement scheme, according to the specific stress conditions and stress concentration characteristics of the chassis: the chassis is a crane beam structure, mainly subjected to bending stress, and the stress is concentrated at the part where the distal end of the outrigger is combined with the center rotation, and the chassis The cross section is a box structure. According to these actual conditions, and combined with the construction requirements, we decided to adopt the plan of strengthening the vertical plates and the horizontal plates respectively, and welding the two plates together with a diagonal-stayed plate. In this way, the three plates form a stable structure. Tripod structure, through theoretical calculation, the strength is increased by more than 15%, which meets the actual use requirements.
In terms of the material selected for the gantry crane, we first identify the base metal, analyze the content of main chemical elements and various mechanical performance parameters, and require the selected material: the chemical composition is close to the base metal to ensure the welding effect; the mechanical properties exceed base metal to ensure strength requirements. After the new material is selected, the base metal and the new material are sampled and welded together, and the destructive test is carried out. The result is that the base metal is broken, indicating that the strength of the new material and the welded part is greater than that of the base metal, which ensures the construction quality and strength requirements.