A bolt dismounting device and dismounting method

Abstract

The invention discloses a bolt disassembly device and a bolt disassembly method. The device includes a plurality of electric disassembly and assembly rotating blocks and a telescopic rod. An expansion frame extending radially along the telescopic rod is installed at one end of the telescopic rod. The electric disassembly and assembly of the rotating block It is installed at the outer end of the expansion frame. When operating, first make the expansion frame in a tightened state, and then use the telescopic rod to insert the bolt dismounting device into the narrow and long space, and extend the expansion frame radially along the telescopic rod, so that each electric disassembly and assembly rotating block is in line with the The bolts to be disassembled are aligned and covered with the bolt heads of the bolts to be disassembled, and the synchronous disassembly and assembly operation of multiple bolts is realized by controlling the electric disassembly and assembly rotating block. The invention uses the rib structure to shrink and expand the expansion frame in the narrow space inside the engine cover, which reduces the difficulty of bolt disassembly and assembly, improves the level of mechanized work, and realizes batch disassembly and assembly of bolts.

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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