A kind of tooling for nickel base alloy pipe welding

Abstract

The invention discloses a welding tool for a nickel-based alloy pipeline, which comprises a first sleeve; the end part of the sleeve is fixed with a bearing disk, and the bearing disk is connected with a second sleeve; a first positioning hole and a second positioning hole are arranged on the cylinder wall of the second sleeve, and mandrels are glidingly sleeved in the first and the second positioning holes; a push rod is connected to the first sleeve, and the first sleeve and the push rod are screwed through a thread; the end part of the push rod is connected with a conical table, and the conical table is placed in the second sleeve; a taper face of the conical table is leant against the end part of the mandrel in the process of welding; an argon pipeline is further fixed on the bearing disk, and a ventilating hole is arranged on the bearing disk; the argon pipeline is connected with the ventilating hole. through an argon filling cavity formed by encircling the argon pipeline, the bearing disk and a flat sealing head, the back face of a weld joint of the nickel-based alloy pipeline can be protected by argon, thus the welding oxidization is effectively prevented; meanwhile, through the mandrel retraction, the welding contraction stress is effectively reduced, and the welding quality of the nickel-based alloy pipeline is improved.

Description

technical field [0001] The invention relates to the technical field of welding tooling, in particular to a tooling for nickel-based alloy pipeline welding. Background technique [0002] During the welding process of nickel-based alloy pipes, more oxygen is easily dissolved in high-temperature liquid nickel to form NiO, thereby forming harmful pores in the weld, and the linear expansion coefficient of nickel material is large, which is easy to generate large stress Shrinkage, resulting in cracking or misalignment at the weld, resulting in poor welding quality and low welding efficiency of nickel-based alloy pipes, which cannot meet the design requirements. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a nickel-based alloy pipeline welding tool, which forms an argon-filled cavity by enclosing the argon gas pipeline, the baffle plate and the flat head, so that the back of the weld seam of the nickel-based alloy pi...

AI Technical Summary

Problems solved by technology

[0002] During the welding process of nickel-based alloy pipes, more oxygen is easily dissolved in high-temperature liquid nickel to form NiO, thereby forming harmful pores in the weld, and the linear expansion coefficient of nickel material is large, which is easy to generate large stress Shrinkage, resulting in cracking or misalignment at the weld seam, resulting in poor welding quality and low welding efficiency of nickel-based alloy pipes, which cannot meet the design requirements

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