摘要
激光淬火枪头相对于工件表面淬火区的倾角直接影响着淬火区域温度场的变化,进而影响淬火表面硬度均匀性。根据五轴激光淬火机床的结构特点,要求在淬火过程中工件表面瞬间淬火区域的法矢须垂直于XOY坐标平面以保证激光淬火质量。提出了利用瞬间淬火区域的四个边界点所组成的两个平面的法矢来确定工件的最佳姿态,并且给出了具体确定四个边界点的计算方法。建立了保证工件最佳姿态的数学模型,利用遗传算法求解出实现最佳位姿C轴A轴的位置角。最后通过对一个具体的三次B样条曲面进行实例计算,验证了该方法的可行性。
The orientation of laser quenching tool to the workpiece surface influences the change of temperature field of quenching area, and then influences the uniformity of surface hardness of the workpiece. According to the structure character of 5 axis laser quenching machine, a rule is advanced that the normal vector of the transient laser quenching area must be always perpendicular to the coordinate plane XOY during laser quenching process. The method to determine the optimal workpiece gesture by the normal vectors of two planes determined by four boundary points in the laser quenching area is proposed. The algorithm to ascertain the four points is given. The model is established to assure the optimal workpiece gesture. Genetic algorithm is used to calculate the location angles of C-axis and A axis for the optimal workpieee gerture. The gesture of workpiece with B splines curved surface is calculated to verify the feasibility of the model.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2009年第2期487-493,共7页
Chinese Journal of Lasers
基金
陕西省教育厅重点科研项目(03JS042)资助课题
关键词
激光技术
复杂曲面
激光淬火
五轴加工
姿态
遗传算法
laser technique
ftee form surface
laser quenching
5 axis manufacturing
gesture
genetic algorithm
