Device and method for detecting surface defects of aviation aluminum material

Abstract

The invention belongs to the technical field of aluminum material surface defect detection, and particularly relates to an aviation aluminum material surface defect detection device and a detection method thereof.The aviation aluminum material surface defect detection device comprises a bottom plate, a sliding plate is slidably connected to the upper surface of the bottom plate, connecting plates are fixed to the two ends of the upper surface of the sliding plate, and a through groove is formed in the middle of the sliding plate; a threaded sleeve is fixed to one side of the upper surface of the bottom plate. The driving mechanism is arranged to drive the threaded sleeve and the two rotating shafts at the same time, so that a point light source emitted by the laser emitter can irradiate on the surface of an aluminum material in a spiral line form conforming to the shape of the surface of the aluminum material, and meanwhile, the screw pitch of the spiral line is kept unchanged, so that detection is not missing, and the detection efficiency is improved. Data of the three optical signal receiving plates are received and processed through the control panel, a three-dimensional coordinate system of reflected light can be obtained, and whether surface defects exist or not and the defect degree can be judged conveniently through a position change curve of the reflected light signals when the aluminum material rotates by one circle in the coordinate system.

Description

technical field [0001] The invention relates to the technical field of aluminum surface defect detection, in particular to a detection device and a detection method for aviation aluminum surface defects. Background technique [0002] In aeronautics, aerospace, ordnance systems, it is known to produce metal bars by mechanical processes such as rolling or drawing. Such a metal bar differs from a metal plate, ingot or strip in that its cross-section has a smaller perimeter / cross-sectional area ratio so that the metal bar can be rotated / twisted about a longitudinal axis while moving longitudinally forward. For example, when the cross-sectional area is uniform for a given shape, the shape of the metal strip then has a perimeter to cross-sectional area ratio equal to or less than 4.25. The shape of such metal strips can be circular, elliptical or polygonal when only the cross section is considered. Common detection devices and detection methods for surface defects of aviation al...

AI Technical Summary

Problems solved by technology

Common detection devices and detection methods for surface defects of aviation aluminum materials mainly include optical detection method and photographic comparison method. Judging whether there is a defect on the surface of the aluminum material, and the photographic comparison method is to take pictures of the aluminum material to be tested from various angles, compare it with the comparison pictures of the same type of aluminum material in the same position in the data system, and find out the defect position through comparison. When the above methods are used to detect the surface defects of aviation aluminum materials, it is necessary to rotate the aviation aluminum materials to make the detection results more comprehensive. The material is rotated, and the aluminum material may be slightly deformed during the rotation process, causing deviations in the detection results. At the same time, the data analysis of the laser detection method is also troublesome. Therefore, a detection device for surface defects of aviation aluminum materials and its detection method to solve the above problems

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