Hole making method with alignment based on machine vision

Abstract

The invention provides a hole making method with alignment based on machine vision. The hole making method is realized through a vision measurement technology of a vision camera, and comprises the following steps of: photographing a locating pin on the surface of a wall plate through the vision camera; carrying out pixel processing on the photographed image through an image processing system; calculating to obtain a geometric center of the locating pin; further calculating to obtain a deviation value of a center of the vision camera and the geometric center of the locating pin; transmitting the deviation value into a movement mechanism controller; driving a movement mechanism to move; and forming a feedback measurement and error compensation closed-loop system until the deviation value reaches to position accuracy requirement of hole making. A projective point of a hole making main shaft projected on a wall plate face is ensured to be consistent to the geometric center of the locating pin, so that the position accuracy of hole making is ensured. Connecting holes with high accuracy can be prepared quickly, the cost is obviously reduced, the work environment is improved, and the hole making efficiency and the assembly accuracy are greatly improved.

Description

technical field [0001] The invention belongs to the field of advanced digital assembly manufacturing and automation, and in particular relates to a digital hole-making method based on machine vision alignment technology. Background technique [0002] In order to achieve accurate and reliable connection between components, the assembly of aircraft wall panels generally adopts screw joints or riveting. Making holes in aircraft wall panels is a key process to realize the connection, and the quality of hole making will directly affect the strength and fatigue life of the aircraft. . At present, the hole making methods of aircraft wall panels mainly include manual drilling and semi-automatic hole making. Manual drilling has low precision and efficiency and high labor intensity. Semi-automatic hole making still requires some manual intervention, such as positioning, Input and NC programming cannot interact with the CAD system very well, and the automatic hole making cannot be tru...

AI Technical Summary

Problems solved by technology

The document "Robot Hole Making System for Automatic Hole Making of Aircraft Components" developed a set of aircraft component level robot hole making system for the problem of automatic hole making of aircraft parts. Technology, in which the visual inspection system provides hole making and welding seam position information, but does not involve interaction with CAD digital models, which affects user visualization level and programming efficiency

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