Railway vehicle side wall chassis assembling technology

Abstract

The invention discloses a railway vehicle side wall chassis assembling technology. A reference point of an important part preferentially makes contact with and is fixed to a chassis, a side wall is pushed towards two ends from the reference point for assembling, stress on the side wall is small, and therefore the side wall is not prone to deformation. The purpose of preferentially assembling any one preferential reference point of the side wall can be achieved, the phenomenon that tolerance is accumulated to one end is avoided, and the phenomenon of rework after assembly is greatly reduced. The railway vehicle side wall chassis assembling technology has the advantages of being low in operation intensity, convenient and fast to operate, high in efficiency and high in assembly quality.

Description

technical field [0001] The invention belongs to the field of rail transit, and in particular relates to an assembly process of a rail vehicle side wall underframe. Background technique [0002] The carriages of rail vehicles are generally composed of four major components: chassis, roof, side walls, and end walls. The assembly of side walls is a difficult point in the process, especially the assembly process of the integral side wall structure is extremely difficult. [0003] At present, the assembly process of the bottom frame and the side wall is carried out according to the following steps: [0004] (1) Set the deflection of the car body welding process equipment; [0005] (2) Hoist the underframe to the welding platform of the car body and fix it rigidly; at this time, the deflection preset of the underframe is completed. [0006] (3) Preset the deflection of the side wall, and make the preset deflection of the side wall the same as the deflection of the chassis. Hois...

AI Technical Summary

Problems solved by technology

The preset deflection of the bottom frame and the preset deflection of the side wall should be consistent in theory, but it is impossible to be exactly the same in the actual welding process, resulting in that when the side wall is forcibly assembled with the bottom frame, the side wall is under great force, and the tensioning device and the Due to the large stress at the contact point of the side wall, it is easy to cause the deformation of the side wall, resulting in rework after hoisting

[0011] 2. The side wall is a vertical structure. When the side wall is assembled with the chassis, it is difficult to find a suitable landing force point for the tensioning device

[0012] 3. The side wall assembly needs to be carried out from one end to the other. If there are high and low steps in the chassis, due to manufacturing errors and assembly errors, the above assembly scheme is difficult to achieve docking at the steps

[0013] 4. The lengths of the side wall and the chassis are inconsistent, and it is difficult to measure the length before assembly. For the existing scheme, it is difficult to evenly distribute the length difference of the two major components to both ends. Often, after one end is installed, the other end cannot be installed and needs to be hoisted again The phenomenon

The whole operation process is labor intensive and inefficient

[0014] 5. The positioning reference for the connection between the side wall and the bottom frame is not necessarily at the end, but may be at the position of the passenger compartment door in the middle. The existing scheme cannot guarantee the alignment of the position of the passenger compartment door after hoisting. The usual method is to carry out heavy-duty, grinding and heavy-duty after hoisting , on-site labor is large

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