Image expression method for cutting geometry

Abstract

The invention discloses an image expression method for a cutting geometry. The image expression method comprises the following steps: taking an intersection of Tri-Dexcel models of a workpiece and a cutter as a Tri-Dexcel model of the cutting geometry; meshing a bounding box of the Tri-Dexel model of the cutting geometry to obtain a plurality of grid units, leading out rays from the sphere center of the cutter corresponding to the cutting geometry, intersecting with the bounding box, searching the grid units positioned at the boundary of the cutting geometry along the ray direction from the grid unit where the intersection point is positioned; connecting the end points of the searched Dexel line segments in the grid units to form a virtual boundary of the cutting geometry; leading out rays from the sphere center of a tool corresponding to the cutting geometry and intersecting the rays with the virtual boundary of the cutting geometry, wherein the distance between two intersection points is the radial cutting thickness, the radial cutting thickness is obtained by storing the rays at different angles through a matrix, and the matrix is converted into a grey-scale map. The image expression method is convenient to store and apply, and can accurately, quantitatively and visually describe the geometrical shape of the cutting geometry.

Description

technical field [0001] The invention belongs to the field of numerical control machining, and more specifically relates to an image expression method of a cutting geometry. Background technique [0002] During five-axis CNC machining, the tool performs complex spatial movements to cut the workpiece and remove excess material. Generally, cutting simulation is used to simulate the actual machining process. The tool and the workpiece make relative motion, the tool cuts the workpiece, and the removed workpiece material, that is, the intersection of the tool and the workpiece is called the cutting geometry. The study of cutting geometry is critical to the study of real-time cutting force and cutting heat, and is of great significance for optimizing processing parameters, improving workpiece surface quality, and improving processing efficiency. During the actual machining process, the direction of the tool axis, the machining path of the tool, and the surface of the workpiece to...

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides an image expression method of the cutting geometry, thereby solving the technical problem in the prior art that the geometric shape of the cutting geometry cannot be accurately and quantitatively described in the cutting process

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