A tool path generation and optimization method for ring cutting based on image processing

Abstract

The invention relates to a method for generating and optimizing ring cutting tool path based on image processing, which comprises the following steps: 1) extracting boundary geometric features of machined regions with arbitrary shapes and converting them into gray-scale images; 2) calculate that shortest Euclidean distance (SED) of each pixel point in the boundary contour line base on the inward advancing method to generate a machining region SED map; 3) generate a SED surface of that machined area accord to the SED diagram, and projecting the intersection line to generate a ring cutting toolpath with no intersection and equal step distance by intersecting with the plane; 4) Multi-objective optimization of the tool path is carried out by using image processing method. Gaussian filter andunsharpening mask (USM) parameters are selected to eliminate machining residues and smooth the tool path, and finally the ring cutting tool path which meets the machining requirements is obtained. Theinvention can overcome the drawbacks of the traditional tool path generation method, realize multi-objective optimization of the tool path, and finally generate a tool path with no self-intersection,no machining residue, and the tool path meets the machining requirements smoothly.

Description

technical field [0001] The invention belongs to the technical field of computer-aided manufacturing (CAM), and relates to a method for generating and optimizing a ring cutting tool path, in particular to a method for generating a tool path for cavity milling, specifically a method for converting the geometric characteristics of a cavity Image information, and then based on the image to generate and optimize the method of circumcision tool path. Background technique [0002] As we all know, aerospace structural parts contain a large number of cavity features, and cavity milling is widely used in the manufacturing process of such structural parts. For decades, various research scholars have studied the generation of cavity milling tool paths, and proposed two types of tool paths, namely, line cutting tool paths and circular cutting tool paths. When processing a complex shape cavity, the row cutting tool rail faces frequent tool retraction and sharp rotation, which will reduce...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of complex and poor versatility of the traditional tool path generation method, and to invent a method for generating and optimizing the circumcision tool path based on image processing, which generates a non-self-intersecting circumcision knife according to the imaged processing area The tool path optimization is transformed from the traditional complex geometric calculation problem to the image processing problem, and the machining residue is eliminated and the tool path is smoothed through reasonable and effective image processing methods

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