Welding method for large nuclear detection container structure

Abstract

The invention provides a welding method of a large nuclear detecting container structure. The method includes adopting a double-sided welding groove on a square flange, bottoming through TIG welding, and capping layer by layer, tailor welding forming and leveling through MIG welding; welding and positioning four wall plates, assembling the same into a box component, and positioning through TIG welding; positioning and assembling the box component with the square flange, and positioning through TIG welding; positioning and assembling reinforcing ribs and a circular flange with the box component, and positioning through TIG welding; welding the weld joints among the components such as the square flange, the circular flange, the wall plates and the reinforcing ribs. The welding method is high in weld joint quality and good in quality reliability, vacuum degree requirements can be satisfied, and use requirements of large seal vacuum nuclear detecting containers can be satisfied.

Description

technical field [0001] The invention relates to a welding process, in particular to a welding method for a large nuclear detection container structure. Background technique [0002] The nuclear detection container is a large-scale sealed vacuum detection equipment. This kind of product has a special structure. The product has a large size, tightness, and high vacuum degree. The no-load vacuum degree must reach 5×10 -4 Pa, full load vacuum reaches 5×10 -3 Pa, so the requirements for weld leakage rate are extremely high. However, due to the large size of the structure, complex structure, numerous welds, welding deformation is prominent, and improper welding sequence and welding method are likely to cause deformation, making manufacturing very difficult. However, the existing processing technology cannot meet the manufacturing requirements. At present, my country has not yet broken through the welding process technical problems of large-scale vacuum nuclear testing equipment,...

AI Technical Summary

Problems solved by technology

However, due to the large size of the structure, complex structure, numerous welds, welding deformation problems are prominent, improper welding sequence and welding methods are likely to cause deformation, making manufacturing very difficult

However, the existing processing technology cannot meet the manufacturing requirements. At present, my country has not yet broken through the welding process technical problems of large-scale vacuum nuclear testing equipment, and cannot complete the processing and manufacturing of large-scale and testing containers, which seriously restricts the development level of my country and testing equipment.

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