Non-contact online inspection method for chemical milling and cutting of large parts

Abstract

The invention discloses a non-contact online detection method for chemical milling cutting of large parts, belongs to the technical field of laser measurement, and relates to a non-contact online detection method for measuring the milling cutting quality of large parts. The detection method comprises the steps: integrating a binocular vision system onto a beam of a machine tool, and measuring local data of a boundary of a large part by adjusting the pose of the binocular vision system; calibrating internal and external parameters of a binocular camera and a T-Mac pose, acquiring measurement data, performing part boundary structure feature point extraction on the data and thus obtaining local three-dimensional information of the part boundary. The local measurement data is unified to a global coordinate system so as to achieve the overall three-dimensional information measurement and reconstruction. The detection method is high in measurement efficiency and convenient in pose adjustment, an original structure of the machine tool is not destroyed during installation, no contact with parts occurs, and the precision is high. The non-contact online detection method has the advantages of real-time measurement, thereby meeting the requirements of milling cutting quality inspection of large parts.

Description

technical field [0001] The invention belongs to the technical field of laser measurement, and relates to a non-contact on-line detection method for measuring the cutting quality of large parts by chemical milling. Background technique [0002] In the aircraft manufacturing process, it is necessary to perform chemical milling on parts such as the fuselage, and then trim the chemical milled parts to meet the specified technical and precision requirements and meet the assembly conditions. After the part is chemically milled, the part is placed on the edge trimming machine to cut the edge part according to the design requirements. The quality of the edge of the part directly affects the external dimension of the part, thus affecting the assembly quality of the aircraft. Therefore, the accuracy of the cutting position of the part Very important to the quality of the aircraft. Through the analysis of the measurement data of the contour cutting position, the deviation between the ...

AI Technical Summary

Problems solved by technology

This method has a simple device structure and can realize automatic detection of thin slice parts with complex shapes. However, since it is installed on a three-coordinate measuring instrument, it cannot detect the boundaries of large-scale parts of the aircraft, and needs to plan the path. Real-time detection of parts being processed

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