Cutter path generation method and device

Abstract

The invention provides a cutter path generation method. The cutter path generation method comprises the following steps: constructing a three-dimensional model of a workpiece; selecting an outer peripheral line and a central part on a to-be-processed curved surface of the workpiece, and setting the step pitch of a cutter; selecting a plurality of fixing line assemblies on the to-be-processed curved surface, enabling each fixing line assembly to include two fixing lines; selecting a ray emission source point, and emitting a plurality of radially distributed rays from the ray emission source point; moving the cutter from the outer peripheral line to the central part in a spiral path according to the step pitch, adjusting the direction when the cutter passes through the fixed line, enabling the central point of the cutter to be sequentially connected with the plurality of rays to form a plurality of straight lines, and enabling the plurality of straight lines to respectively intersect with the to-be-processed curved surface to form a plurality of intersection points; and sequentially connecting the plurality of intersection points from the outer peripheral line to the central part toform a spiral cutter path. The invention further provides a cutter path generation device. According to the tool path generation method and device, workpieces machined by the tool path generated are consistent in pattern and good in appearance quality.

Description

technical field [0001] The invention relates to the technical field of numerical control machine tools, in particular to a method and device for generating tool paths of numerical control machine tools. Background technique [0002] With the development of aerospace, shipbuilding, automobile, energy, metallurgy and other industries, CNC machine tool processing technology is being widely used in the processing of high-precision workpieces. During the machining process of CNC machine tools, the tool path can be reasonably planned according to the geometric shape and process parameters of the workpiece, and the NC machining program can be generated according to the tool path, so that the NC machine tool can drive the tool for processing according to the NC machining program. [0003] At present, the surface of some workpieces is a 3D curved surface, and the 3D curved surface includes a top surface and a transition surface positioned around the top surface. The existing machini...

AI Technical Summary

Problems solved by technology

The existing machining methods usually use two NC machining programs to process the top surface and the transition surface, and each NC machining program includes a tool path. However, the texture patterns of the top surface and the transition surface are inconsistent after processing. The junction between the transitional surfaces is prone to produce obvious tool marks, so the appearance quality of the workpiece is not high, and the processing efficiency is not high

Images