Method for distinguishing geometrical characteristic changes generated before and after integral panel part engineering is changed

Abstract

The invention provides a method for distinguishing geometrical characteristic changes generated before and after integral panel part engineering is changed. The method is characterized in that when the geometrical characteristic changes generated before and after integral panel part engineering is changed are distinguished, firstly, models generated before and after design is changed are placed at the same coordinate position in space, the appearance face of the model generated after the change is dispersed, thickness values, at all dispersion points, of the models generated before and after the change are calculated independently, the thickness-direction size deflection value, at the same dispersion points, of the models generated before and after the change is judged, the dispersion points with the deflection exceeding the distinguishing accuracy are marked, and changed characteristics can be judged through the positions where the dispersion points with the deflection exceeding the distinguishing accuracy are located. By means of the method, the current situation that changed parts are distinguished only by manually observing the models can be effectively changed, the part production cycle can be shortened, and the manufacturing accuracy can be improved.

Description

technical field [0001] The invention relates to a method for judging the change of geometric features before and after engineering modification of an integral wall plate part, and belongs to the technical field of model modification evaluation. Background technique [0002] As an important aircraft structural part, the integral wall panel is not only an important part of the aerodynamic shape of the aircraft, but also the main load-bearing member of the wing and fuselage. It is also used in important parts of the aircraft structure such as the floor and fuel tank. Its manufacture is It is an important link that determines the overall performance of the aircraft, and its digital manufacturing is the key to the digital manufacturing of aircraft. [0003] Engineering changes are unavoidable during the development of an aircraft due to design improvements and the use of new materials. Complex integral wall panel parts have various structures, product design and forming process ...

AI Technical Summary

Problems solved by technology

Complex integral wall panel parts have various structures, product design and forming process are complicated, it is difficult to change and the cycle is long

Different engineering changes have different influences on the manufacturing model and in different ways. In the process of derivation from the design model to the manufacturing model, those data structure changes related to the derivation will inevitably affect the manufacturing model, and the position of the design change can be quickly and accurately judged. And the content is the premise of changing the manufacturing model, which determines the cycle and accuracy of the change. The current method of the factory is usually to place the model before and after the change at the same coordinate position in space and set different colors, and manually observe the two models to determine the change information. The process cumbersome and error-prone

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