A device for improving the sensitivity of magnetic detection of aeroengine blades

Abstract

The invention discloses a device for improving magnetic testing sensitivity of an aviation engine blade. The device mainly comprises a fixing bottom plate for arranging a tool device on a magnetic testing equipment bed, a tenon holding head which is arranged on the fixing bottom plate and which is used for holding one end of a tenon of the tested blade, a blade tip holding head for holding one end of the tested blade, and an extended plate which is arranged on the tenon holding head and which is used for increasing the length-diameter ratio of the tested blade, wherein the mounting direction of the extended plate is opposite to the mounting direction of the tested blade; the tenon holding head and the blade tip holding head are arranged oppositely; at least one of the tenon holding head and the blade tip holding head is a rotary holding head which can hold the tested blade to rotate; and at least one of the tenon holding head and the blade tip holding head is a movable holding head which can move and adjust the mounting position relative to the other one. The device has the characteristics that the longitudinal magnetization sensitivity is high, the length-diameter ratio is smaller than blade magnetic testing magnetic field intensity, demagnetization can be easily achieved without using large-size demagnetization equipment to carry out repeated demagnetization, the magnetic testing efficiency is high, and the device is applicable to various blades.

Description

technical field [0001] The invention relates to the magnetic detection technology of aero-engine blades, and more specifically relates to a tooling device used for magnetic detection equipment to improve the magnetic detection sensitivity of aero-engine blades. Background technique [0002] Aeroengine blades are very important parts of aeroengines. Magnetic particle testing (magnetic inspection) is required piece by piece before assembly, and demagnetization is required after magnetic inspection to ensure the safe operation of aeroengines. The magnetic particle inspection of aero-engine blades is a special inspection, and the defects that can be detected include cracks, inclusions, hairlines, folds, etc. In order to ensure the reliability of magnetic inspection and prevent accidents due to defects after parts are installed, it is necessary to carry out magnetic inspection and demagnetization in strict accordance with the magnetic inspection procedures and standards. Magneti...

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the existing magnetic detection of blades, the purpose of the present invention is to provide a device for improving the sensitivity of magnetic detection of aircraft engine blades, so as to solve the problem of low longitudinal magnetization sensitivity in the existing magnetic detection technology. Magnetic inspection of blades requires high magnetic field strength and difficult demagnetization. Large-scale demagnetization equipment needs to be used for repeated demagnetization. The efficiency of magnetic inspection is low, and there are few types of applicable blades.

Images