Aircraft on-site assembly precision prediction method based on actuallymeasured data
A technology for on-site assembly and precision prediction, applied in forecasting, data processing applications, instruments, etc., can solve the problems of declining assembly productivity and lack of precision predictive control methods, and achieve the effect of improving the success rate of assembly and reducing assembly rework and assembly scrap.
Active Publication Date: 2018-10-09
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
However, in the stage of aircraft on-site assembly and production, there is a lack of effective precision prediction control methods. In addition to leaving assembly margins for certain processes for "installation and adjustment", most of the process assembly is in a "trial assembly" state, resulting in Unnecessary assembly rework and tooling adjustments reduce assembly productivity
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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0045] refer to figure 1 , a method for predicting aircraft field assembly accuracy based on measured data provided in an embodiment of the present invention, the method includes the following steps:
[0046] Step 1, convert the fit constraints of each part in the assembly unit into anchor point constraints.
[0047] This step specifically includes:
[0048] (1) Analyze the fit constraints of the constrained parts and the fit features that constitute the fit...
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The invention discloses an aircraft on-site assembly precision prediction method based on actually measured data, and relates to the technical field of aircraft assembly. According to the method, thematched constraint of each part in an assembly unit isconverted into a positioning point constraint, and a plurality of positioning points on each part are selected. The positioning deviation of eachpositioning point is measured through digital measurement equipment, anda positioning analysis model is built according to the positioning points. Meanwhile, the position deviation of each part is calculated according to the positioning deviation, and the position deviation of a key point is calculated according to the position deviation. The position deviation of a current part and the positioning deviation of a next part are combined according to the assembling sequence, and then the combined deviation is adopted as the positioning deviation of the next part. The positioning deviation of thenext part is input into the positioning analysis model, so that theposture deviation is obtained. The above process is repeated till all parts are analyzed, so that the assembly deviation of the design requirements is obtained, namely the assembly precision. According to the invention, the problem that in the field assembly stage of the aircraft, the assembly precision of the process cannot be predicted can be solved. Therefore, the technical foundation is provided for improving the one-time assembly success rate of aircrafts and reducing the assembly reworking and assembly scrap.
Description
technical field [0001] The invention relates to the technical field of aircraft assembly, in particular to a method for predicting the accuracy of aircraft on-site assembly based on actual measurement data. Background technique [0002] In the process of aircraft assembly and production, although process designers are in the process design stage, they control and optimize the assembly accuracy of key processes of aircraft products by adjusting the assembly sequence, positioning reference, assembly tolerance and other assembly processes. However, in actual assembly operations, due to practical factors such as tooling errors, assembly deformation, and part manufacturing deviations, aircraft products do not meet the design requirements after assembly, and incidents of assembly rework and assembly scrapping occur from time to time. [0003] At present, the measures and means of domestic aircraft manufacturers to control the assembly quality are mainly concentrated in the assembl...
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Login to View More IPC IPC(8): G06Q10/04G06Q50/04
CPCG06Q10/04G06Q50/04Y02P90/30
Inventor 耿俊浩胡波李五朋刘殷杰张敏田锡天马华
Owner NORTHWESTERN POLYTECHNICAL UNIV