Aero-engine air inlet guide vane and rocker arm combined drilling device and using method thereof

Abstract

The invention discloses an aero-engine air inlet guide vane and rocker arm combined drilling device and a using method thereof. The aero-engine air inlet guide vane and rocker arm combined drilling device is positioned by two end points of an I-I cross-section chord line of a guide vane, and comprises a bottom plate, a rear journal axial positioning assembly, a front journal axial positioning piece, a rear journal positioning assembly, an axial compression screw, a pressing block, an angular positioning assembly, a compression template, a drill plate, a drill sleeve, a bushing and a rocker armpositioning pin. Since an included angle alpha between an intersecting line of the inclined surfaces of the upper portions of the two side faces of an angular positioning block of an angular positioning piece and the bottom surface is equal to an included angle between the I-I cross-section chord line of the guide vane and the axis of a rocker arm, the included angle between the I-I cross-sectionchord line of the guide vane and the axis of a rocker arm can be controlled within an allowable tolerance range by using the aero-engine air inlet guide vane and rocker arm combined drilling device to perform combined drilling operation of the guide vane and the rocker arm, and the qualification rate of parts can reach 95% or more; and meanwhile, the difficulty of clamping the guide vane during drilling operation is greatly reduced, and the efficiency is improved.

Description

technical field [0001] The invention belongs to the field of assembly of air intake guide blades of aero-engines, and in particular relates to a tool for combined drilling of air intake guide vanes and rocker arms of aero-engines and a use method. Background technique [0002] Air intake guide for aero-engine is mainly composed of outer ring, inner ring, guide vane, fixed rocker arm and transmission device. The installation angle of the guide vane is adjustable. When the fixed rocker arm rotates, the guide vane rotates together with the fixed rocker arm. The angle between the I-I section of the guide vane and the center line of the rocker arm determines the performance of the engine. The improvement of the accuracy of the included angle can accurately warn the engine surge boundary. Therefore, it is necessary to ensure that the included angle between the Hyun line of the I-I section of the guide vane and the center line of the rocker arm meets the technical requirements thro...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the tooling for combined drilling of air intake guide vanes and rocker arms of aero-engines is mainly composed of a base plate, an axial positioning part of the rear journal, an axial positioning part of the front journal, and a positioning part of the airfoil profile. The airfoil profile is positioned so that the angle between the I-I cross-section of the guide vane and the center line of the rocker arm meets the technical requirements. Due to the large difference in the blade profile, it is difficult to clamp during drilling and processing, and the efficiency is low. Unstable quality, low product qualification rate, difficult to meet production needs

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