Assembling and welding process for box beam inserted and connected structure framework

Abstract

The invention discloses an assembling and welding process for a box beam inserted and connected structure framework and relates to the technical field of railway passenger car bogie framework welding.According to the process, a cross beam is disassembled into two parts; one part is a non-closed box body, composed of an upper cover plate, outer side transverse vertical plates, inner side transverse vertical plates, longitudinal vertical plates and rib plates, namely a half-finished cross beam; and the other part is a cross beam lower cover plate. By means of the reasonable welding sequence andadjusting of the welding amount, it is guaranteed that the deformation amount of the half-finished cross beam after welding is stabilized in an ideal value range; then the half-finished cross beam isassembled with side beams and positioning welding is completed, the cross beam lower cover plate is assembled finally, remaining weld joints of the cross beam and weld joints at the connected positions of the cross beam and the side beams are subjected to overall welding, and finally assembling and welding of the box beam inserted and connected structure framework are completed. According to theassembling and welding process for the box beam inserted and connected structure framework, flexural deformation of the cross beam vertical plates can be controlled, the cross beam after welding is not needed to be subjected to machining, and the production quality and the production efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of rail passenger car bogie frame welding, in particular to a welding process for box girder plug-in structural frames. Background technique [0002] At present, there are two main structures of rail passenger car bogie welded frames: one is an H-shaped welded structure in which box-shaped side beams and tubular beams are connected; the other is an H-shaped structure in which box-shaped side beams and box-shaped beams are connected. Type welded structure. The box-type transverse and side beam plug-in structure has excellent performance in terms of bending resistance and cross-sectional change at the junction of the transverse and side beams, but its structure is relatively complex, and welding deformation control is difficult, which leads to difficulties in assembling the transverse and side beams. In actual production, before the beams and side beams are assembled into a frame, it is necessary to machine t...

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Problems solved by technology

[0003] In order to solve the difficulty in the assembly of the transverse beam due to the difficulty in controlling the welding deformation during the welding process of the box-type girder plug-in structure, and the welding of the end of the vertical plate of the beam after the beam is machined due to the existence of transverse bending...

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