Welding device for large-size variable-curvature hollow storage box membrane shell

Abstract

The invention provides a welding device for a large-size variable-curvature hollow storage box membrane shell. The device comprises a storage box membrane welding part and a storage box shell welding part. The storage box membrane welding part is in a flat plate shape; the storage box shell welding part is in a cylindrical frame shape; the storage box membrane welding part and the storage box shell welding part can be assembled into a hollow columnar frame; a storage box membrane is positioned and mounted on the storage box membrane welding part; and a storage box shell is positioned and mounted on the storage box shell welding part. According to the welding device for the large-size variable-curvature hollow storage box membrane shell, the liquid attitude and orbit control storage box membrane can be quickly and reliably welded, and a shell of the liquid attitude and orbit control storage box membrane is connected with a positioner rotating device; and a mode that a clamping mechanism is additionally arranged and an inner supporting positioning block is additionally arranged is adopted, so that rapid clamping, dismounting and precise positioning of a thin-wall part membrane are achieved, and inward concave deformation is prevented.

Description

technical field [0001] The invention relates to a welding device for a membrane shell of a large-scale variable-curvature hollow storage tank. Background technique [0002] The attitude-orbit control propulsion system plays an important role in various spacecraft, that is, to maintain the stability of the orbit and attitude of the spacecraft. The storage tank is one of the most critical parts in the power system, and its manufacturing and processing quality directly affect the service performance of the entire propulsion system. With the rapid development of aerospace technology, spacecraft such as satellites are required to extend the working time in orbit, which leads to a large increase in liquid fuel in the spacecraft. In the past, bladder tanks were mainly used, but the compatibility of rubber bladders and propellants could not guarantee the long-term storage of propellants. As a new type of storage tank, the metal diaphragm storage tank not only has good corrosion re...

AI Technical Summary

Problems solved by technology

The tank diaphragm and the shell are welded by laser. Since the diaphragm is a spherical thin-walled part, the diameter is about 600mm, and the thickness gradually becomes thinner as the height decreases. The thickness gradually changes from 1.6mm to about 1mm, which is a typical large-size variable Curvature hollow components require high welding accuracy, and the existing welding equipment is difficult to meet the welding requirements

According to the retrieval of relevant literature at home and abroad, most of the welding devices of the current storage tank are conventional welding fixtures, and the welding of the storage tank shell is mostly seen, but the clamping and positioning of the diaphragm are lacking, such as the patent application number CN 109352244 A is a girth welding device for load-bearing spherical storage tanks. It is mainly used for welding the upper and lower shells. Both the upper and lower shells are thicker than the diaphragm, lacking internal positioning support, and the difficulty of welding is average. Less than the difficulty of assembling and welding the diaphragm and the shell, especially the difficulty of assembling and welding the thin-walled diaphragm

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