Connectivity Checking Method for Laser Cutting Programming Graphics of Aircraft Model

Abstract

The invention provides a connectivity detection method for an aircraft template laser cutting programming graphics. A program for implementing the method is developed based on ObjecARX(VC). The method comprises the steps of firstly acquiring all elements in a CAD two-dimensional graphic and decomposing composite elements therein; starting with the first element in a search scope and searching for elements related thereto recursively, and moving the found elements out of the search scope and performing marking; finally realizing connectivity judgment. The method can judge whether an outline is closed rapidly and accurately, the judging results being consistent with the results obtained by a main stream laser programming program used in the industry; for non-closed outlines, the method can show disconnection positions. The invention provides the rapid and reliable solution for connectivity detection of aircraft template laser cutting programming graphics and lays a powerful foundation for the automatic processing of the aircraft template laser cutting programming graphics.

Description

technical field [0001] The invention relates to a connectivity checking method for laser cutting programming graphics of an aircraft model, and belongs to the technical field of aircraft digital manufacturing. Background technique [0002] Aircraft model is a kind of rigid measuring tool made of certain features of aircraft parts, groups and parts at a ratio of 1:1 and with process information. It is simple to manufacture, low in cost, and easy to use. a wide range of applications. To manufacture an aircraft model, it is necessary to convert the part features to be expressed into two-dimensional graphics in the three-dimensional digital model, and then import the two-dimensional graphics into a special laser programming program to automatically generate a cutting program after a series of processing. For areas such as template outlines, through holes, and viewports, it is necessary to ensure that their graphics are connected in laser programming (such as figure 1 ). Howev...

AI Technical Summary

Problems solved by technology

However, for most parts such as wall panels and frames with large size, large curvature and complex shape, the graphics quality of the inclined edges, rounded corners, curved structures, etc. Location, such as breaks, overlaps, excess threads, misplaced ends, etc.

The graphics processing program SYLBDxfProcess currently used in the industry provides the function of checking connectivity to try to solve this kind of problem, but this program can only check one chain at a time (such as image 3 ), and the operation is slow, it takes dozens or even hundreds of operations to complete the connectivity check of a complex part, the check result is not accurate, and the performance is far from the actual demand

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