Efficient and precise repairing and matching method for complex-structure annular pipes of engine

Abstract

The invention provides an efficient and precise repairing and matching method for complex-structure annular pipes of an engine. Three-way joints, four-way joints and five-way joints on two annular pipes are positioned at the same time through a series of tools; a tool base is installed on a cabin body through bolts, and a connecting nozzle of the three-way joint or the four-way joint or the five-way joint penetrates through a through hole in the tool base and is connected with an outer sleeve nut with a guide section; and When the three-way joint, the four-way joint, the five-way joint and a titanium pipe are assembled and disassembled, only the outer sleeve nut needs to be disassembled, the position of the tool base on the cabin body is unchanged all the time, and it is guaranteed that the positions of the annular pipes, the three-way joint, the four-way joint and the five-way joint are kept consistent every time. According to the method, the filing, positioning and repairing difficulty of a titanium alloy ring pipe assembly of the complex structure can be reduced, the production period is shortened, and the positioning precision is guaranteed.

Description

technical field [0001] The invention relates to a ring pipe repairing method, which belongs to the technical field of assembling pipeline connectors with complex structures. Background technique [0002] The main pipeline for conveying propellant on the attitude control engine is usually an annular conduit assembly welded by titanium alloy general parts and titanium tubes. The shape and structure of the pipeline of the ring pipe assembly is complex. After the ring pipe is assembled, the gap with the surrounding components is very small, and the assembly position accuracy of each channel is high. There is no compensation allowance for the structure and span of the ring pipe, which requires that the ring pipe must be repaired and welded once to pass, otherwise sawing and repairing will cause interference in the assembly of the ring pipe. [0003] The main pipeline of a certain attitude control engine is 2 pieces of inner and outer parallel double-row ring pipes, each of which...

AI Technical Summary

Problems solved by technology

[0004] Due to the complex structure and high dimensional accuracy, the ring pipe file repair, positioning, and assembly process are difficult, mainly reflected in: 1) The ring pipe components have many spatial positions and dimensions, and the positioning accuracy requirements are high, and the clearance requirements, verticality requirements, and angle requirements must be met. Requirements and parallelism requirements; 2) The six titanium tubes on each ring tube need to be sampled, bent, filed and welded section by section, and it needs to be disassembled and assembled 6 times to complete the welding of the whole tube. The position is not fixed, which makes it difficult to guarantee the repair accuracy of the ring pipe, which affects the assembly consistency of the engine; 3) The processing cycle of the ring pipe is long and the production efficiency is low

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