Aircraft part high-precision matching component processing method based on digital measurement

Abstract

The invention discloses an aircraft part high-precision matching component processing method based on digital measurement. The method comprises the following steps: the surface of a to-be-processed aircraft component is carved with three cross mark lines; the to-be-processed aircraft component is comprehensively measured by the use of a variety of vision-based digital measurement methods to obtain point cloud data of the surface and center point data of the cross mark lines; a CAD model is provided, and the measured point cloud data and the CAD model are optimally aligned to obtain the position of a to-be-processed contour of the CAD model in the point cloud data and the positions of the cross mark lines in a CAD model coordinate system; the to-be-processed aircraft component is placed and clamped on a processing machine tool, and the work piece coordinate system of the to-be-processed aircraft component on the machine tool is established with the use of the center points of the cross mark lines; the relationship between the work piece coordinate system and the CAD model coordinate system is calculated with the use of the center points of the cross mark lines, and numerical control programming on the to-be-processed contour is performed under the work piece coordinate system; and the to-be-processed aircraft component is processed by the use of a numerical control program.

Description

Technical field: [0001] The invention relates to a method for processing high-precision matching parts of aircraft components based on digital measurement, which belongs to the field of processing aircraft parts. Background technique: [0002] Most aircraft components are assembled from easily deformed thin-walled parts. The assembly process of parts is affected by the processing technology of thin-walled parts, and the precision control is difficult. In order to ensure that the two sets of parts of the aircraft can match each other, a machining allowance is usually left on one set of parts, and the parts are repaired according to the actual situation during the assembly process, which is called matching processing. Therefore, the aircraft parts are divided into two parts according to whether they are processed after matching: the parts to be processed and the parts matched with the parts to be processed. [0003] The matching processing in the assembly process of aircraft ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for processing high-precision matching parts of aircraft components based on digital measurement, which utilizes the high-precision data acquisition capability of the digital measurement method to solve the problems related to the distribution density of data points in the optimal alignment process and the processing of CNC machine tools. Aircraft Parts Positioning Problem

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