Calculation method for shortest distance between inner surfaces of airplane structural member complex groove cavity

Abstract

The invention discloses a calculation method for shortest distance between inner surfaces of an airplane structural member complex groove cavity. Steps comprise the followings: 1) converting planes tolines, including steps of describing and classifying side surfaces of a common groove cavity, and selecting an edge set; 2) calculating distances between lines, including determining validity, calculating distances between line segments, calculating distances between line segments and arc segments, and calculating curves between arc segments. Compared with conventional manual detection, the method has higher detection efficiency on the shortest distance between inner surfaces of an airplane structural member groove cavity. The technology has important effects on ensuring a correct, effective,standard, and reasonable component geometric model.

Description

technical field [0001] The invention relates to the field of numerical control machining of aircraft structural parts in aviation manufacturing, in particular to a method for calculating the shortest distance between inner surfaces of complex grooves of aircraft structural parts. Background technique [0002] In modern aircraft design, in order to meet the requirements of high performance, integral structural parts with superior performance are widely used. However, in the three-dimensional CAD modeling of structural parts, especially complex, super-large and multi-station processing , such as design method, design level and other factors, make the design model of parts have various defects or irregularities or even errors. Among them, the shortest distance between the inner surfaces of the cavity of the part is too small is a common defect, which will cause the machining area to fail to enter the tool. At present, in actual production, a large number of manual methods are ...

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