Pre-deformation connection method for thin-walled corner joint structures with different thicknesses

Abstract

The present invention relates to a pre-deformation connection method for thin-walled fillet structures of different thicknesses, and belongs to the technical field of mechanical processing of metal materials. The present invention realizes the connection and manufacturing of fillet structures of different thicknesses by using the novel process technology, expands the application principle of welding technology, and applies a lower cost, simpler and more efficient processing of L-shaped cross-section thin-wall fillet welding. With the help of the invented universal welding fixture for symmetrical parts and the design of the clamping mechanism to prevent overloading, the processing technical requirements of typical bulkhead type parts are reduced, and the process parameter requirements, equipment capacity requirements, and special tooling structure requirements are reduced to varying degrees. By utilizing the anti-deformation internal stress measures of the edge strip parts, the accumulation of deformation after welding of the thin-walled fillet structure can be greatly reduced, making heat treatment correction easier. The method has a strong promotion characteristic, and can be implemented for thin-walled fillet structure type bulkhead parts, with high production efficiency and broad application prospects in the aircraft manufacturing industry.

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