Bolt dismounting and mounting device and dismounting and mounting mode

Abstract

The invention discloses a bolt dismounting and mounting device and a bolt dismounting and mounting mode. The bolt dismounting and mounting device comprises a plurality of electric dismounting and mounting rotating blocks and a telescopic rod, an expansion frame extending in the radial direction of the telescopic rod is mounted at one end of the telescopic rod, the electric dismounting and mountingrotating blocks are mounted at the outer end of the expansion frame, and during operation, the expansion frame is in a tightened state firstly; the bolt dismounting and mounting device goes deep intoa long and narrow space through the telescopic rod, the expansion frame extends in the radial direction of the telescopic rod, each electric dismounting and mounting rotating block is aligned with abolt to be dismounted and mounted in a positioning mode and sleeves a bolt head of the bolt to be dismounted and mounted, synchronous dismounting and mounting operation of the bolts is achieved by controlling the electric dismounting and mounting rotating blocks, dismounting and mounting are completed, and the expansion frame is retracted, reset and exit from the narrow space; and through an umbrella rib structure, the expansion frame is retracted and expanded in the narrow space in an engine hood, the difficulty of bolt dismounting and mounting work is lowered, the mechanical operation levelis improved, and meanwhile batch dismounting and mounting of the bolts are achieved.

Description

technical field [0001] The invention relates to the field of aero-engine assembly, in particular to a bolt dismounting device and dismounting method suitable for narrow and long spaces. Background technique [0002] Aeroengine assembly is a key step in the aircraft manufacturing process, and its assembly performance directly affects the overall performance and operational stability of the aeroengine. The assembly cost and assembly workload in the manufacturing process of aero-engines account for a relatively large proportion, of which the cost accounts for about 40%, and the workload accounts for more than 50% of the entire machine manufacturing workload. The assembly of aero-engine involves the connection between the compressors at all levels in the engine. The compressors at all levels are mainly connected by discs. There are as many as 24 bolts between each disc of the low-pressure compressor and high-pressure compressor. Therefore, in the manufacturing and production of...

AI Technical Summary

Problems solved by technology

[0003] Most of the bolts used to connect the discs in the existing aero-engine compartments are installed using torque wrenches and manual tightening methods. Due to the relatively large axial distance between the compartments in the engine, the installation space is relatively narrow and the manpower When installing or disassembling these bolts, it is difficult for the operator to reach the bolts, and the operator cannot observe the installation of the bolts at all times, and it is even more difficult to use tools such as wrenches. High requirements for length and operating experience

On the other hand, manual assembly is time-consuming and labor-intensive, and the efficiency is very low. On average, each person can connect at most 2 to 3 discs per day, and manual assembly of bolts is likely to lead to problems such as inconsistent bolt load distribution, unstable assembly quality, and high manufacturing costs.

[0004] In order to improve the efficiency and quality of bolt disassembly and assembly, you can choose to introduce automatic bolt locking devices such as mechanical arms. However, there are certain differences in the bolt types of different types of aero-engines. The bolted connection assembly between them solves the problems of unstable assembly quality and high manufacturing cost caused by the extensive use of special tooling and manual assembly in traditional assembly. It has become a modern society to seek high-efficiency, high-reliability, flexible and automated assembly of aero-engine bolt assembly processes. The needs of the development frontier

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