A process method for controlling welding deformation of rail transit box girder components

Abstract

The invention discloses a process method for controlling welding deformation of rail transit box girder components, which comprises the following steps: the first step is to divide the welding sequence of each component into sequential units; The component design in the program is to assemble the point-fixed tooling and complete the spot-fixed welding; the third step is to carry out anti-deformation preloading for the component assembly after the assembly and point-fixing; the fourth step is to complete the anti-deformation preloading The assembly is completely welded; the fifth step is to continue to perform the above operations on the next sub-sequence until all the components of the box girder structure are welded; the sixth step is to perform flatness and warpage inspection on the box girder structure, and if the inspection is qualified, then Welding is completed; if the inspection fails, the adjustment and shaping operation will be carried out until the product passes the inspection or is scrapped. The invention has the beneficial effects of being applicable to a variety of products, reducing the adjustment and repairing pressure, and being well applicable to the automatic welding process of a manipulator.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a process method for controlling welding deformation of a box girder component of a rail transit vehicle. Background technique [0002] The box girder structure is a beam-type load-bearing structure with small self-weight, high tensile strength, high material utilization rate, and flexible structure. It is composed of cover plate system, vertical plate system and internal ribs. Bridge, construction and heavy industry. Vehicles in the rail transit industry also generally use box girder structures as important load-bearing beams, such as locomotive traction pillows, frames, etc., as attached figure 1 It is a common box girder load-bearing structure, which mainly includes three major components: 101-cover system; 102-vertical system; All connections between large components need to be welded. In terms of operation, there are complex structures and many penetration welds, which l...

AI Technical Summary

Problems solved by technology

[0005] (1) Specific assembly and welding tooling with prefabricated anti-deformation needs to be designed for each product, and the pre-pressing anti-deformation system needs to be hydraulic, the cost of the tooling is high, and it is only applicable to a single product;

[0006] (2) Repairing after welding, the structure has become a whole, requires a lot of repairing pressure; if the repairing top pressure is not properly controlled, it will cause weld damage and the risk of product scrapping is high;

[0007] (3) When using the automatic welding process of manipulators, the accompanying welding tooling adopts a hydraulic system that has extremely high requirements on the interface and oil leakage prevention, but the hydraulic system in this method is difficult to meet the corresponding high requirements, so this method is only suitable for manual welding

[0008] To sum up, there is still a lack of a process method for controlling welding deformation of rail transit vehicle box girder components that can be applied to a variety of products, has less repair pressure, and is well applicable to the automatic welding process of manipulators.

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