Processing track generation method and corresponding device

Abstract

The invention relates to a processing track generation method and a corresponding processing track generation device. The processing track generation method comprises the steps of: discretizing a surface of a workpiece to be processed into a triangular piece model according to a three-dimensional model of the workpiece to be processed; determining one or more triangular pieces covered by projection of a cutter from a driving point to the triangular piece model along a predetermined projection direction for each driving point on a driving track planned on a driving surface corresponding to thesurface of the workpiece to be processed; for each triangular piece, determining a cutter projection point and a projection distance determining the smallest projection point with the minimum cutter projection distance as a cutter contact point corresponding to the driving point, and determining a cutter location point corresponding to the driving point according to the cutter contact point; and generating a processing track on the surface of the workpiece to be processed according to the cutter location point corresponding to each driving point on the driving surface corresponding to the surface of the workpiece to be processed. The invention further provides a computer storage medium.

Description

technical field [0001] The present invention relates to the technical field of numerical control machining, and more specifically relates to a method for generating a machining trajectory and a corresponding device for realizing the method, which can be applied to applicable numerical control machining scenes such as five-axis numerical control machining. Background technique [0002] Compared with three-axis CNC machining, five-axis CNC machining increases the freedom of two rotation axes, which can achieve better fit between the tool and the machined surface, reduce machining time, and improve the machining accuracy of the workpiece surface. Whether it is three-axis CNC machining or five-axis CNC machining, it involves the calculation of the machining tool path. The currently commonly used tool path calculation strategies include the tool location surface (CL-surface) strategy, the tool contact-driven strategy (Contact-driven) and the projection-based strategy (Projection-...

AI Technical Summary

Problems solved by technology

[0007] (1) Most of the tool path calculation strategies on anti-gouging processing are only applicable to three-axis CNC machining;

[0008] (2) When the current projection algorithm is used to generate the machining trajectory, the calculation efficiency of the machining trajectory is often low, and it is necessary to solve the nonlinear high-order equation

If the equation has multiple roots, it is very easy to miss some roots, that is, the optimal solution cannot be found, resulting in the failure of the projection algorithm and the failure to obtain the correct tool contact, resulting in the missing of the machining track, which seriously affects the surface quality of the workpiece;

[0009] (3) Since the five-axis CNC machining adds two degrees of freedom of the rotation axis, the direction of the tool axis of each tool contact is arbitrary, and the current projection algorithm does not give a specific projection to the triangular mesh along any direction. The implementation scheme limits the use of the projection algorithm in five-axis triangular mesh machining, making the machining trajectory irregular and uneven relative to the driving trajectory

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