A method for shape, position and dimension control of a 5m-level weakly rigid super-long storage tank

Abstract

The embodiment of the invention discloses a control method for shape and position dimensions of a 5M weakly-rigid overlong storage tank. According to the control method, the control over roundness shape and position dimensions of the storage tank with high diameter-to-thickness ratio and weak rigidity can be realized, so that the storage tank is prevented from obviously deforming in the welding process and after welding. The storage tank is formed by welding a front bottom surface, N cylinder section parts (N is a natural number) and a rear bottom surface. The method comprises the following steps: fixing an end frame of the rear bottom surface of the storage tank on the front end face of a tooling machine head; butting the rear bottom surface with the first cylinder section part to form a welding seam, removing misaligned sides on two sides of the welding seam and then welding; butting the first cylinder section part with the second cylinder section part to form a welding seam, and removing misaligned sides on two sides of the welding seam and then welding until abutting the (N-1)th cylinder section part with the Nth cylinder section part to form a welding seam, removing misaligned sides on two sides of the welding seam and then welding; fixing an end frame of the front bottom surface of the storage box on the front end face of a tooling machine tail; welding the end frame with the Nth cylinder section part.

Description

technical field [0001] The invention relates to the field of rocket tanks, in particular to a method for controlling the shape, position and size of a 5M-level weakly rigid super-long tank. Background technique [0002] In recent years, the aerospace industry has developed rapidly, and China's aerospace industry has ushered in a new stage. In order to catch up with developed countries in Europe and the United States in the development of space stations and manned spaceflight, China has vigorously developed new launch vehicles. In order to meet the transportation requirements of the construction of the space station, the size of the tank needs to be increased. For this reason, the new generation of rockets proposed for the first time the design requirements for a tank with a diameter of up to 5 meters and a single tank length of more than 20 meters. However, the material of the rocket tank is usually weakly rigid aluminum alloy, and its thickness is usually between 4mm and 15...

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Problems solved by technology

[0004] However, for a high-diameter-thickness ratio, weak rigidity, and super-long storage tanks with a diameter of 5 meters and a length of 20 meters, the overall length cannot be controlled by controlling the size of a single component because the accumulation of errors is easy to exceed the tolerance; in addition, High diameter-to-thickness ratio, weak rigidity, and super long storage tanks cannot wait for later calibration

All in all, the tank production process of the prior art does not meet the production requirements of high-diameter-thickness ratio, weak rigidity, and super-long tanks

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