Placement layer theoretical thickness measuring and calculating method based on automatic tow placement technology

Abstract

The invention discloses a placement layer theoretical thickness measuring and calculating method based on an automatic tow placement technology. The placement layer theoretical thickness measuring andcalculating method based on the automatic tow placement technology comprises the following steps that a die pasting surface of a part to be formed is extracted, and the die pasting surface is represented with point cloud; the center line of each tow on a first placement layer is extracted according to a theoretical track of a placement tow program, and all center lines are sequentially extractedon the subsequent placement layers; for any placement layer, a vertical line and a vertical line length of any point of the point cloud and any center line on the placement layers are solved; according to the calculated distances between the points and the center lines, whether the points fall in a prepreg coverage area or not is judged, all the points of the point cloud are judged in sequence, the points falling in the prepreg coverage area are screened out, the points falling outside the prepreg coverage area are removed, and the new point cloud is used for expressing the theoretical thickness of the placement layers; and all placement layers are analysed, the point cloud representing the theoretical thickness of each layer is superposed, repeated points are counted, coloring is carriedout according to a counting result, and the final theoretical thickness of the full placement layers is expressed according to the counting size corresponding to different chromatograms.

Description

technical field [0001] The invention relates to the field of automatic wire laying, in particular to a method for measuring and calculating the theoretical thickness of layers based on automatic wire laying technology. Background technique [0002] The full name of automatic fiber placement technology for composite materials is automatic tow placement technology ATP (Automated TowPlace-ment), also known as fiber placement technology (FiberPlacement). Automatic wire laying technology was proposed in the 1970s as a reform of winding and tape laying technology, aiming to overcome the "periodical, stable and non-overhead" aspects of winding technology and the fact that automatic tape laying must follow the "natural path". Limitation, for the manufacture of composite fuselage structures, the core technology is the design and development of multi-tow placement heads and the development of corresponding material systems. Boeing and Hercules began to develop automatic wire laying t...

AI Technical Summary

Problems solved by technology

[0004] The traditional thickness measurement method is to use ultrasound and other means to measure the composite material after curing. There is no way to characterize the theoretical thickness before curing. It can only rely on the experience of programmers to avoid overlapping triangles and achieve the theoretical thickness as much as possible. This method There are problems such as large errors and repeated trial and error

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