Torque-limiting automatic wrench for aero-engine assembly

Abstract

A torque-limiting automatic wrench for aero-engine assembly comprises three electric torque-limiting wrenches, lower connectors, connecting rods, upper connectors, a lower ring, a middle ring, an upper ring and handle nuts, wherein each electric torque-limiting wrench corresponds to one lower connector and is connected with the corresponding lower connector; the three lower connectors are separately connected to the upper connectors through the connecting rods; the three upper connectors are separately connected to the side parts of the lower ring, the middle ring and the upper ring; and the lower ring, the middle ring and the upper ring are fixedly connected into a whole through the handle nuts. The three bolts and the three nuts which are evenly distributed in the circumferential direction are screwed down at the same time, and the assembling stress can be better controlled, so that the problems of frame mounting corners and inclined mounting are solved; and the problems of overlargeassembly stress, bolt breakage and stud falling of individual bolts are solved, so that the assembly quality is improved, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the assembly and manufacturing technology of aero-engines, and in particular relates to a torque-limiting automatic wrench used for assembling aero-engines. Background technique [0002] Aeroengines are assembled from many parts, most of which are connected by bolts and nuts. In the assembly process of aero-engines, the technical requirements for installing and tightening nuts are very high, and it is not easy to describe them in words or solidify them in process documents, and only rely on the hands-on guidance of experienced operators. For example, to control and reduce the assembly stress, it is necessary to use the criss-cross method to align points and tighten the nuts in a cycle. However, how much to tighten and how much torque to use each time can only rely on the experience and the operator's hand feeling, which brings great difficulties to the assembly work. big instability. When there is no multi-purpose automatic w...

AI Technical Summary

Problems solved by technology

When new employees do not master it, there will always be problems with mounting angles, mounting angles, excessive stress on individual bolts, broken bolts, and falling off of screw piles.

If the parts are deformed, the mounting surfaces of the two parts to be installed cannot be partially bonded. At this time, the cross method cannot meet the assembly requirements. The cross method can only tighten one bolt at a time, but it is not tightened at one time, but cross tightened.

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