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

A technology for welding components and processing methods, applied in welding accessories, manufacturing tools, welding equipment, etc., can solve the problems of welding seam fatigue cracks, uncontrollable fatigue cracks on ship-based combustion engines, cracks falling off blocks, etc., to achieve high welding strength, Break through the technical bottleneck of crack removal and enhance the effect of root penetration

Active Publication Date: 2015-04-01
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
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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.

Method used

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

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Such as figure 1 As shown, the thin-walled double-runner welded assembly has a complex structure, consisting of inner and outer runner welded assemblies with different thicknesses and rectifying blades 3, which is equivalent to the turbine rear casing with a sheet metal structure, which integrates laser processing, welding, and lathe processing. Integrating, boring, and non-destructive testing processes, there are as many as 96 fillet welds formed by the welding components of the inner and outer runners and the rectifier blades, which brings great difficulty to the stability of the overall welding and machining; thin-walled double runners The structural welding components are made of high-temperature alloy GH536 material, and shrinkage deformation occurs in the welding area by the existing technology, and the deformation stress...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23K9/32B23K9/16
CPCB23K9/16B23K9/32B23P15/00
Inventor 刘宝琪高俊邵天巍徐强张立超
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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