基于遗传算法的曲面加工优化双刀具选择算法

Optimize Double-cutter Selection Algorithm of Surface Machining Based on Genetic Algorithm

针对球头刀加工自由曲面时的局部干涉影响曲面加工效率问题,提出了优化双刀具选择算法。基于曲率模型求取无曲率干涉加工自由曲面的最小刀具尺寸,给出对应不同尺寸刀具划分自由曲面干涉区域和非干涉区域,等面积平面近似曲面计算刀具路径总长度计算方法,基于遗传算法求解由刀具尺寸与刀具路径长度建立的双刀具选择模型。验证实例表明该算法能够显著提高自由曲面加工效率。

In order to solve the problem that local interference will affect the efficiency of free-form surface machining by using ball cutter,double-cutter selecton algorithm is put forward. Firstly,the minimum cutter that can machine the whole surface without local interference is acquired from the curvature model. Then,the freeform surface is divided into interference area and non-interference area corresponding to different cutter size. The simplified calculation method of total length of toolpath is given by replacing the free-form surface areas with same size flat surface. So the double cutter selection model is constructed from the cutter size and the total length of toolpath. The optimized cutter size can be solved by genetic algorithm. The experimental results showthat the proposed algorithm can significantly improve the efficiency of free-form surface machining.