Curvature fairing method for high-speed numerical control processing track

Abstract

The invention provides a curvature fairing method for a high-speed numerical control processing track. The curvature fairing method comprises the steps of: inputting tool location points of an initial processing track; interpolating the initial tool location points by utilizing B-spline curve repeatedly to obtain a tool processing track line, and representing the tool processing track line by using the B-spline curve; calculating a stiffness matrix of a track curve according to node vectors of the B-spline curve; calculating a closest point from each initial tool location point to the B-spline curve and curve parameters corresponding to the closet points, and calculating a first-order derivative of a distance (from the initial tool location points to the closest points of the B-spline curve) to control points of the B-spline curve; solving a tool processing track curvature derivative fairing model by adopting a sequence linear method to obtain a processing track after fairing optimization; and outputting tool locating points of the tool processing track after fairing optimization. The curvature fairing method solves the problem of generating the high-speed numerical control processing tool track with fair curvature, and is suitable for generating a 2.5-axis cavity high-speed processing track.

Description

technical field [0001] The invention relates to the generation of a smooth 2.5-axis cavity milling tool machining track, in particular to a curvature smoothing method of a high-speed numerical control machining track. Background technique [0002] In the integral panel processing of aerospace, a large number of triangular and quadrilateral cavities need to be processed. High-speed cutting is an effective means to realize high-efficiency machining of integral wall panels. [0003] The method of ring cutting or line cutting, and the method of direct transition or arc transition at the corner will make the machine tool frequently accelerate and decelerate during the machining process, resulting in vibration of the machine tool, and it is difficult to improve the machining efficiency. The helical milling tool path can effectively reduce the fluctuation of tool load and tool wear, and can improve the processing efficiency and quality. [0004] If the curvature of the helical mi...

AI Technical Summary

Problems solved by technology

[0004] If the curvature of the helical milling tool rail fluctuates at the corner, it will still affect the feed speed during the machining process and reduce the machining efficiency

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