Automatic 5m-level storage box spherical box bottom flange plate welding method

Abstract

The embodiment of the invention provides an automatic 5m-level storage box spherical box bottom flange plate welding method. The method is suitable for a large-diameter storage box bottom, low in welding difficulty, low in requirement for tool equipment and high in assembling quality and welding quality. At least one fragment (1) in a plurality of fragments (1) forming the spherical box bottom needs to be provided with a flange plate (2). The method includes the steps that the fragments (1) to which the flange plates (2) are required to be assembled are provided with flange mounting holes (3) at the designated positions; the fragments (1) with the flange mounting holes (3) are fixed to a tool operating face, and the outer surface of the tool operating face is a die (4) matched with the inner surfaces of the fragments (1) in shape; the flange plates (2) are placed at the flange mounting holes (3), and the flange plates (2) are welded to the flange mounting holes (3); the steps are repeated till all the fragments (1) to which the flange plates (2) are required to be assembled are welded to the corresponding flange plates respectively. All the fragments (1) for forming the spherical box bottom are welded together to form a storage box spherical box bottom circular ring.

Description

technical field [0001] The invention relates to the field of rocket storage tank processing, in particular to an automatic welding method for a spherical bottom flange of a 5m-level storage tank. Background technique [0002] Tanks (also known as propellant tanks) are important components of space vehicles (including rockets, space shuttles, missiles, etc.), used to store fuel and bear all structural loads, and have large diameters, thin materials, and weak rigidity. specialty. The storage tank is generally welded by two tank bottoms and a plurality of tube sections, wherein the tank bottom is usually a hemispherical shape spliced ​​by eight melon petals. [0003] In practical application scenarios, it is necessary to install a flange plate at the bottom of the storage tank for liquid inlet (liquid hydrogen and oxygen) pipes, control pipes, monitoring system lines, etc. The existing storage tank flange welding method is usually: first splicing the melon petals into a hemis...

AI Technical Summary

Problems solved by technology

[0004] However, the flange plate of the above-mentioned welding method needs to be manually welded, and the welding quality is greatly affected by human factors, and the welding process needs to start and stop arcs many times, and the welding deformation is large

Especially when the tank diameter is 5m level, it is more difficult to control

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