Composite positioning device and positioning method for standardized EMU chassis

Abstract

The invention discloses a standardized D-series high-speed train chassis combined positioning device and a positioning method thereof, and belongs to the field of standardized D-series high-speed train chassis large part whole installing and welding positioning auxiliary devices and using methods thereof. The positioning device comprises an FE end positioning tooling, an end chassis positioning tooling, a chassis center line positioning tooling and a plurality of side beam middle lateral jacking mechanisms. According to the combined positioning device, the parts such as the FE end positioning tooling and the end chassis positioning tooling can realize modular mass production, are convenient to overhaul and maintain, reduce the production cost, become base parts of assembly line work, and make a following process new method possible that a chassis is installed and welded and then machined overall; and the following whole machining method can effectively guarantee the geometrical size of the chassis, the position size of a floor doorway, the diagonal size of the chassis, the whole length of the chassis and the like, and is more advantageous to improve product manufacturing precision and forming quality.

Description

technical field [0001] The invention belongs to the field of an overall assembly and welding positioning auxiliary device for large parts of an underframe of a standardized EMU and a method for using the same, and in particular relates to a combined positioning device and a positioning method for the underframe of a standardized EMU. Background technique [0002] Such as Figure 1 to Figure 4 As shown, the head car underframe 19 of the existing Chinese standardized EMU train is a large part assembled and welded as a whole tens of meters long, and the underframe 19 includes a floor 19-1, two side beams 19-2, FE (underframe front end; bottom frame front end) end 19-3 and end bottom frame 19-4, two side beams 19-2 are symmetrical to each other, the front end is provided with side beam inner curved arc section 19-2-1, side beam 19-2 The lower end face of is provided with the side beam long groove 19-2-2 that inner cavity is wider but the less opening. [0003] Such as Figure ...

AI Technical Summary

Problems solved by technology

[0018] In order to solve the cumbersome process steps of the existing standardized EMU underframe synthesis method, it is necessary to invest in five sets of different large-scale clamping or flipping positioning tooling, and the staff need to repeatedly perform long-distance dimension measurements on the assembly welding station tens of meters long. The measurement process is time-consuming, labor-intensive, poor in accuracy, and low in production efficiency. The butt weld of the edge beam and the floor in the form of lap joints will cause the FE end to be unable to connect with the opening ends of the inner curved arc sections of the two edge beams in the form of plugging. The root side beams are plugged and fitted, so that the automatic welding technology cannot be directly implemented, and the welds of tens of meters must be welded by hand, resulting in technical problems such as low weld strength, high labor intensity, and low production efficiency. The invention provides a synthetic positioning device and positioning method for a standardized EMU underframe

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