Engine complicated structure ring pipe positioning repairing method

Abstract

The invention provides an engine complicated structure ring pipe positioning repairing method. Mutually buckled positioning clamping blocks are used to fix T-junctions and four-way joints on ring pipes; the buckling positions form a cylindrical through hole which is parallel to the plane where the ring pipes are positioned; when a positioning clamping block fixes a T-junction and a ring pipe, or fixes the four-way joint and the ring pipe, the ring pipe which is connected with one end of the T-junction or the four-way joint penetrates through the through hole, two side faces, perpendicular to the radial direction of the through hole, of the positioning clamping block abut against an axial end of the T-junction or the four-way joint, the side faces, parallel to the plane where the ring pipeis positioned, of the positioning clamping block press against the adjacent ring pipe, or humps are formed in the side faces, parallel to the plane where the ring pipe is positioned, of the positioning clamping block and an L-shaped angle formed by the humps and the positioning clamping block is close attached to the adjacent ring pipe; and titanium pipes are repaired one by one after the T-junctions and the four-way joints on two ring pipes are fixed. The method can lower the positioning and repairing difficulty of a complicated-structure ring pipe module, shorten the production cycle, guarantee the positioning precision, and improve the assembly consistency of an engine.

Description

technical field [0001] The invention relates to a positioning and repairing method, which belongs to the technical field of assembly and welding of pipeline connectors with complex structures. Background technique [0002] The main pipeline for conveying propellant on the attitude control engine is usually a ring pipe assembly welded by titanium alloy general parts and titanium pipes. 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 margin for the structure and span of the ring pipe. It is required that the ring pipe must be repaired and welded once to pass, otherwise the sawing repair will cause interference between the ring pipe and the cabin structure, and then it cannot be assembled. [0003] The main pipeline of a certain attitude control engine is two ring pipes arrang...

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, which are mainly reflected in: 1) The space envelope size of the ring pipe components is large, and the positioning accuracy requirements are high, and the clearance requirements, angle requirements and parallelism requirements must be met. 2) When the titanium tube is sampled and repaired, the clamping positions and angle directions of the 18 pieces of tees and crosses on the ring tube are not fixed, which makes it difficult to guarantee the repair accuracy of the ring tube, and the production consistency of the ring tube is poor; 3) There are 37 branch conduits connected to the ring pipe. The poor consistency of the ring pipe production leads to the failure of mass production of the 37 branch conduits, which seriously restricts the engine assembly cycle

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