Tool and method for matching circular ring with transitional ring at bottom of rocket storage box

Abstract

The invention relates to a tool and method for matching a circular ring with a transitional ring at the bottom of a rocket storage box and belongs to the technical field of rocket storage box bottom welding. The method is good in adaptability to perimeter errors generated after a part product is welded; the mutual latitude matching relation between the small-end perimeter dimension of the variablecross-section transitional ring and the large-end perimeter dimension of the circular ring can be converted into the longitude relation to be matched, and in other words, the milling and cutting height of the large end of the circular ring is determined through assembling of the small end of the transitional ring; the variable cross-section perimeter dimension which is not convenient to measure is converted into the height dimension which is convenient to measure; measurement difficulty is lowered; and measurement precision is improved. High-precision assembling of the perimeter dimension ofa circular seam of the transitional ring is achieved; matching consistency of perimeter dimensions of two parts is guaranteed; and guarantee is provided for efficient assembling and subsequent high-quality welding of the circular seam of the transitional ring.

Description

technical field [0001] The invention relates to a tooling and method for matching a circular ring and a transition ring at the bottom of a rocket storage tank, and belongs to the technical field of welding the bottom of a rocket storage tank. Background technique [0002] The diameter of the bottom of the core tank of my country's launch vehicle is Ф3350mm, which is an aluminum alloy structural part, consisting of a top cover, a ring, and a transition ring. The schematic diagram of the bottom structure is as follows figure 1 shown. [0003] With the continuous improvement of the quality requirements for aerospace products, the friction stir welding technology is used for the longitudinal seams of the tank bottom of the new type of launch vehicle. Friction stir welding is a solid-phase joining technology. It is a high-speed rotation of the stirring head with a stirring pin inserted into the workpiece to be welded. Through the friction between the stirring pin, the shaft shou...

AI Technical Summary

Problems solved by technology

[0011] The technical problem of the present invention is: to overcome the deficiencies of the prior art, and to propose a matching tooling and method for the ring at the bottom of the rocket storage tank and the transition ring, the method is aimed at the actual circumference of the upper end of the transition ring after welding and the lower end of the ring after welding The circumference is not easy to measure and has been changing dynamically, and it is difficult to ensure the consistency of the transition ring seam in the assembly process. A method for accurately matching the perimeter size of the transition ring seam at the bottom of the rocket tank is proposed.

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