Free-form surface fiber placement track design method

Abstract

The invention discloses a free-form surface fiber placement track design method which comprises the following steps: freely extending and expanding the periphery of a curved surface outwards to a quadrilateral-like boundary, and taking a quadrilateral projection to include an original curved surface; taking the projection of the tetrahedron as a boundary, and intercepting an internal curved surface as a curved surface for track design; adopting a public trajectory design algorithm to complete curved surface coverage fiber placement trajectory design; acquiring the boundary of the original free-form surface; and intercepting a coverage track by using the boundary of the free-form surface, and removing the redundant track outside the boundary to obtain the coverage track of the free-form surface. Trajectory planning is carried out based on the gridding curved surface. The application range is wide, and limitation of the shape and type of the curved surface is avoided the trajectory planning difficulty is reduced and the operation efficiency is high.

Description

technical field [0001] The invention belongs to the field of automatic forming of carbon fiber composite materials, and relates to a method for designing wire laying tracks on a free-form surface. Background technique [0002] Composite material automatic laying technology is one of the advanced composite material automatic forming technologies developed recently. It is developed on the basis of winding technology and automatic tape laying technology by combining their respective advantages. Before the implementation of wire laying, it is necessary to design the trajectory first, and then control the robot and other automatic wire laying equipment to work according to the trajectory. The existing fixed-angle planning methods are different in specific algorithms, but they can be divided into two types according to the implementation methods: (1) Analytical method. For surfaces that can be expressed by equations, functions can be derived for planning; (2) Secondary developmen...

AI Technical Summary

Problems solved by technology

Programming and development based on commercial CAD software, and integrating the algorithm into the CAD environment, but both methods have defects: although the analytical method has fast speed, high precision, and small data volume, its scope of application is limited; while the secondary development method can save software Development time and cost, but too much dependence on CAD software, making development difficult

In addition, the two methods are more cumbersome for the design of free-form surface wire laying trajectory, and the scope of application is limited

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