Processing method and clamp for thin-wall double-channel structure welding assembly

Abstract

The invention provides processing method and clamp for a thin-wall double-channel structure, and belongs to the technical field of welding and processing. The method is that double-surface argon-arc welding is performed for welding the weld joint strength, the welding deformation is controlled by rigid limiting of the clamp, thus the processing quality of the welding assembly of the double-channel structure is improved, the technical bottleneck of cracking and chipping can be broken, and the stability of mass production and processing can be improved. The method comprises the steps of welding to form an inner channel welding assembly; welding to form an outer channel welding assembly; forming an inner channel hole and an outer channel hole; forming a groove; mounting the thin-wall double-running structure welding assembly on the clamp; performing double-surface argon-arc welding; non-destructively testing; thermally treating under vacuum. The clamp comprises a base, a rectifier blade locating block, a vertical column, a supporting rod, a pressing plate, an expansion block, a propping rod, an inner channel locating block, an outer channel locating block, a pressing cover, a first nut and a second nut.

Description

technical field [0001] The invention belongs to the technical field of welding processing, in particular to a method for processing a welding component with a thin-walled double-flow channel structure and a clamp. Background technique [0002] The installation of gas turbines has become one of the main symbols of the modernization of surface ships and has been widely used in the navy. During the durability test of a ship-borne gas turbine, the problem of cracks and block failures in the flow channel of the rear casing needs to be controlled and solved urgently. The fault is mainly due to fatigue fractures, and the fatigue originates from the unwelded inner side of 24 rectifying blades welded on one side. The sharp corners of the welded joints are subjected to comprehensive external forces during work to generate stress concentration, which induces fatigue cracks in the weld seam. The existing welding process cannot control the fatigue cracks and meet the reliability and long...

AI Technical Summary

Problems solved by technology

During the durability test of a ship-borne gas turbine, the problem of cracks and block failures in the flow channel of the rear case needs to be controlled and solved urgently. The fault is mainly due to fatigue fractures, and the fatigue originates from the unwelded inner side of 24 rectifying blades welded on one side. The sharp corners are subjected to comprehensive external forces during work to produce stress concentration, which induces weld fatigue cracks. The existing welding process cannot control fatigue cracks and meet the reliability and long life requirements of ship-borne gas turbines.

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