Welding and repairing method and device for thin-walled part

Abstract

The invention discloses a welding and repairing method and device for a thin-walled part. The welding and repairing method comprises the following steps: performing preheating and overheat preventingtreatment on the the thin-walled part, rolling or adhering a low-melting-point sheet metal to the back side of at the welded part of the thin-wall part, and using a melt fusing phase transformation latent heat unsteady efficient heat absorption principle to realize local efficient cooling of the thin-walled part to further prevent the phenomenon that the thin-walled part is excessively heated to cause deformation or burnthrough in the welding process.

Description

technical field [0001] The invention relates to the technical field of repair and processing of aviation parts, in particular to a welding repair method and device for thin-walled parts. Background technique [0002] With the rapid development of the aviation industry, the components tend to be large and integrated, thin-walled, lightweight, and complex in shape, and must meet the requirements of high performance and low cost. For example, most of the parts in the engine or fuel tank are large thin-walled parts, and their working environment is harsh, and they are often damaged by high-temperature gas, wind erosion and pressure shock. Due to the high cost of most parts and the long processing cycle, it can reduce a lot of costs for enterprises to use damaged parts directly after repair. [0003] Commonly used repair methods for thin-walled parts include laser cladding, thermal spraying, and welding. However, due to the insufficient thickness of thin-walled parts, thermal de...

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Problems solved by technology

[0003] Commonly used repair methods for thin-walled parts include laser cladding, thermal spraying, and welding. However, due to the insufficient thickness of thin-walled parts, thermal deformation and burn-through are often caused by excessive heating during processing and repair, which seriously affects the Dimensions of the part, resulting in the repaired part not meeting service standards

[0004] Most of the existing welding repair processes use mechanical clamping to provide stability for the parts and prevent deformation of the parts during welding, but this method can only ensure that the deformation of the parts near the clamping place is small, and cannot Prevent deformation and burn-through caused by excessive heat

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