Method for repairing aviation weak-rigidity casing

Abstract

The invention belongs to a casing repairing method, and particularly relates to a method for repairing an aviation slender thin-wall weak-rigidity casing. The method comprises the following steps thatfirstly, each hole system of the casing is measured by using three coordinates, a shaft system with an external spigot is used as a reference, the holes of other shaft systems on a main shell body ofthe casing is aligned through the coordinates, after the main shell body of the casing is repaired, the main shell body of the casing is taken as a reference, and the holes in a matched shell body ofthe casing is aligned to be repaired. According to the method, the alignment accuracy is effectively improved by means of position alignment, and the specific operation is cured, so that the repairing period of the shell body is shortened and fixed, the production rhythm arrangement is facilitated, and the waste of the time cost is reduced.

Description

technical field [0001] The invention belongs to a method for repairing a casing, in particular to a method for repairing an aviation slender, thin-walled and weakly rigid casing. Background technique [0002] Nowadays, due to the high manufacturing cost of aviation products, the manufacturing process of military aviation products is complicated, and the cost of use is high, which is mainly reflected in the short repair interval of the engine and the large amount of scrapped parts during the repair process. In order to further reduce the cost of use, aero-engines are required to have high maintainability, especially for the maintenance of large parts, scrapping should be minimized to save economic costs. In addition, large shell parts are mostly casting parts, and the cycle from production preparation to part processing is long. Successful repair of shell parts can save time and cost and guarantee the user's service life. [0003] The repair of the engine casing in the prior...

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Problems solved by technology

[0004] When machining the engine casing, it can be clamped through the reserved part of the casting, and combined processing can be used to ensure it. However, when repairing, the casting reserve has been processed, so the selection of the clamping position needs to be more reasonable, and the machining allowance is very large when repairing. less, requires higher alignment accuracy, and because the shell has a certain degree of wear and deformation after long-term work, and there is no regularity, resulting in difficult repairs and long repair cycles.

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