Hole making method with alignment based on machine vision

A machine vision and vision technology, applied in the direction of manufacturing tools, drilling/drilling equipment, boring machine/drilling machine components, etc., can solve the problems that affect the user's visualization level and programming efficiency, so as to reduce labor intensity and improve work efficiency Effect

Inactive Publication Date: 2012-11-14
NORTHWESTERN POLYTECHNICAL UNIV
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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. Technol

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  • Hole making method with alignment based on machine vision
  • Hole making method with alignment based on machine vision
  • Hole making method with alignment based on machine vision

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Embodiment Construction

[0027] The invention is used to accurately locate the position coordinates of the positioning nails on the aircraft wall plate when the industrial robot automatically makes the hole; update the theoretical positioning nail position information in the digital model and offline program, and then provide the upper computer and the industrial robot controller with all The location information of hole making is required, which can significantly improve the accuracy of hole making location.

[0028] The invention provides a hole position alignment method based on machine vision, which is used for automatic hole making of aircraft wall panels, calibrates the position of the visual camera and the hole making spindle, and updates the theoretical positioning nails and actual positioning nails in the digital model and offline programs. The positional offset error of the positioning nail ensures the positional accuracy of the industrial robot's hole making. The closed-loop system formed b...

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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...

Claims

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Application Information

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IPC IPC(8): B23B49/00
Inventor 程晖宋丹龙张开富段元欣骆彬
Owner NORTHWESTERN POLYTECHNICAL UNIV
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