Assembling method of the fixed outrigger of the rail crane crane on the middle beam of the main frame

Abstract

The invention discloses a method for assembly crane fixed supporting legs of a rail crane vehicle on main frame middle beams. The assembly method is characterized in that the middle beams and crane fixed supporting legs are included, each middle beam comprises an upper cover plate, a longitudinal vertical plate, a transverse partition plate and a lower cover plate, and avoiding openings matched with a crane fixed supporting leg assembly are formed in the upper cover plate. The method comprises the following steps of: firstly positioning and welding the upper cover plate, the vertical plate and the partition plate of each middle beam into an integer in an assembly process, arranging the crane fixed supporting legs into the avoiding openings, and welding and fixing the connecting parts of the upper cover plates and the vertical plates of the middle beams and the crane fixed supporting legs; and then, adding counterweight and sealing the lower cover plates of the middle beams. By regulating an existing assembly method for the crane fixed supporting legs, welding for the crane fixed supporting legs is performed before welding of the middle beams, so that the problem that the crane fixed supporting legs are time-wasting and labor-wasting in assembly, and are poor in appearance quality is solved; and meanwhile, welding seams are additionally formed in the connecting surfaces between the crane fixed supporting legs and the inner parts of the middle beams, so that structural strength is improved, and production quality and efficiency of the main frame are effectively improved.

Description

technical field [0001] The invention relates to a method for assembling a lifting vehicle, in particular to a method for assembling a fixed leg of a crane of a rail lifting vehicle on the middle beam of a main vehicle frame. Background technique [0002] At present, the main frame of the rail crane and the fixed outrigger of the crane are connected by an embedded structure, that is, the fixed outrigger of the crane is embedded in the structure inside the center beam. The specific assembly method is: the center beam assembly and the crane fixed outrigger assembly are processed separately first, and during the assembly process of the main frame assembly, the crane fixed outrigger assembly is inserted into the avoidance gap of the center beam (such as Figure 7 shown). Because the center beam is assembled and welded in advance, the two center beams are completed separately, the assembly error plus welding deformation, and the relative error of the two center beams assembly, it ...

AI Technical Summary

Problems solved by technology

Because the center beam is assembled and welded in advance, the two center beams are completed separately, the assembly error plus welding deformation, and the relative error of the two center beams assembly, it is difficult for the fixed legs of the crane to pass through the two center beams Avoid gaps, resulting in the need to grind the avoid gaps of the center beam during on-site construction

Moreover, due to the poor accessibility of welding between the center beam and the fixed leg of the crane, the construction difficulty of welding is greatly increased, and the welding quality is affected.

The process of assembling the main frame of the rail crane vehicle and the fixed legs of the crane after the center beam is assembled is not only time-consuming and labor-intensive, but also greatly increases the difficulty of construction, and the appearance quality is very poor due to the grinding of the center beam. become a serious technical and quality bottleneck

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