Genetic Algorithm-Based Contour Curve NC Code Generation Method and Its NC Machine Tool

Abstract

A profilogram numerical control code generation method based on the genetic algorithm and a numerical control machine tool thereof are used for numerical control machine tools. The method comprises the following steps: (1) a mathematic model is established for a profilogram of a processed piece in a numerical control system; (2) the genetic algorithm is subjected to programming iterative computation in a computer to obtain an approximate node; (3) processing curved surface tool path numerical control codes of a processing tool are generated and output; (4) the processed piece is put on a processing platform and is positioned and fixed by a clamp; (5) a tool changer performs tool outputting and tool setting, and positions a processing original position; and (6) the processing tool carries out processing of the processed tool on the processing platform according to the obtained processing curved surface tool path numerical control codes. The inventions brings forward the profilogram numerical control code generation method based on the genetic algorithm and applies the method to the numerical control machine tool, so that an optimal processing curved surface tool path can be directly and effectively determined to enable the processing tool to accurately complete numerical control processing and raise the working efficiency and quality of the numerical control machine tool. The operation is simple and direct. The processing is high in precision.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a genetic algorithm-based method for generating numerical control codes for contour curves and a numerical control machine tool thereof. Background technique [0002] CNC machine tool is an automatic machine tool equipped with a program control system. With the rapid development of mechanical and electronic technology, CNC machine tool equipment has been widely used in the field of mechanical processing. After decades of development, the technical level has been greatly improved. The functions of CNC machine tool products are becoming more and more perfect, and the specifications are becoming more and more complete, but the changes and enrichments in functions and specifications alone cannot meet the processing needs. [0003] At present, in the NC machining of the contour curve of the workpiece by using the NC machine tool, a straight line or an arc is generally us...

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Problems solved by technology

The main methods for approximating nodes with straight lines of free curves include equal distance, equal chord length and equal error approximation nodes. Among them, the method of approximating nodes with equal error straight lines can make the errors of all approximation line segments equal, and can guarantee the processing error of the approximation nodes, but in actual In computer applications, the programming of geometric algorithms for free curves and other error straight line approximation nodes is complicated and difficult to implement directly. For complex curves, it is difficult to effectively determine the optimal processing surface trajectory. It can only be realized by numerical analysis and processing. The machining process of the CNC machine tool for the contour curve of the workpiece is cumbersome, the precision of the machining surface trajectory is low, and the operation is complicated. Therefore, the geometric algorithm that uses free curves and other error straight lines to approximate nodes is not well applied to the machining of CNC machine tools. among

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