Method for implementing numerical control finish machining for large component of aeroplane based on digitalization error compensation template

Abstract

The invention discloses a method which realizes numerical control finish machining of intersection of large parts of the airplane on the basis of a digital error compensation template, comprising the steps as follows: firstly, a quasi static movement error model thereof is built, all the original errors are measured and obtained, and then a compensation of the quasi static movement error is realized; all machining tasks are carried out under a practical working condition; the comprehensive machining error residual after the first compensation is measured; and the total error compensation value is obtained comprehensively and a corresponding digital error compensation template is built. The machining precision of the intersection of a plurality of airplane wings of the same type is ensured by the repeated movement precision of a machining center. The method has the advantages that the precise numerical control machining center can be adopted to realize the precise machining of the intersection of the large parts of the airplane, the real-time performance is high, the numerical control program and the software and hardware of the machining center are not required to be changed, the advantages of the high precision of the repeated movement of the numerical control machining center is sufficiently played, and the control requirement on the workshop environmental temperature is reduced.

Description

technical field [0001] The invention belongs to the application field of numerical control machine tools, and relates to a method for realizing the numerical control finish machining of intersection points of large aircraft parts based on a digitized error compensation template. Background technique [0002] In the field of modern aircraft manufacturing, in order to achieve the best quality fuselage docking assembly and improve the aerodynamic performance of the aircraft, digitally adjust the attitude of large parts such as the aircraft fuselage before the assembly, so that the front starting intersection point and wing body intersection point The position deviation of important points such as the intersection with the aircraft gun is controlled within ±0.3mm. For high-speed aircraft that require outstanding aerodynamic performance, the intersection of wing and body is connected by bolts, and the design hole-shaft-hole fit is φ12~φ30H8 / h7 / H8. The corresponding theoretical g...

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Problems solved by technology

The purpose is to solve the problem that the motion positioning accuracy of special CNC machine tools at the current precision level in my country cannot meet the requirements for the intersection finishing of large parts of model aircraft

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