Welding process method for aluminum structure roof of EMU driver's cab

Abstract

The invention relates to an assembly welding process method for an aluminum structure ceiling of a driver cab of a motor train unit. The assembly welding process method is characterized in that (1) at the premise of not changing the integral structure of the original structure, ceiling modules are separated, the structure of the original driver cab is re-divided, one part of structure is separated from a left side wall structure and a right side wall structure, and is used as a longitudinal edge beam of the ceiling structure, and then bulk parts which cannot be singly combined in the original structure can form the ceiling welding structure; (2) a welding tooling adopting the reverse assembly and outer positioning method is used for positioning and clamping, the welding sequence of the new ceiling structure is adjusted, the welding of a ceiling window frame structure is firstly completed, then the welding of a ceiling skeleton and a front window frame is completed, and finally the welding of a ceiling skin and the skeleton is completed, so a five-shaft processing center can complete processing at one time. The assembly welding process method has the advantages that the existing production technique of the aluminum structure ceiling of the driver cab of the motor train unit is a full new technique, the product quality of the ceiling part is improved, the assembly welding difficulty of the aluminum structure ceiling of the driver cab is decreased, the production cycle and labor intensity of the driver cab assembly are improved, the production modularizing of the driver cab is improved, and the quality is conveniently guaranteed.

Description

technical field [0001] The invention relates to an assembly and welding process for rail passenger cars, in particular to an assembly and welding process for the streamlined driver's cab aluminum structure roof of an EMU. Background technique [0002] At present, there is no separate synthetic roof structure technology for the aluminum structure of the EMU driver's cab in China, and it is the first case of roof synthesis with a three-dimensional streamlined appearance. In the welding process of the original high-speed vehicle cab assembly, only the left and right side walls, the rear ring frame and the front window frame were separately synthesized. In the cab assembly process, these four parts were welded with the rest of the cab to complete the entire cab. . In the original plan, because a large number of parts were not combined into a whole separately, the welding position of the parts was difficult and the welding workload was large during the assembly of the parts, whi...

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Problems solved by technology

In the original plan, because a large number of parts were not combined into a whole separately, the welding position of the parts was difficult and the welding workload was large during the assembly of the parts, which resulted in a long manufacturing cycle of the driver's cab assembly, and the free deformation of the top position of the driver's cab was extremely large, resulting in The quality of aluminum structure production products fluctuates greatly

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