激光淬火工件安装位置标定算法研究

Study on Workpiece Location Calibration Algorithm of Laser quenching

激光光斑能量密度是激光淬火关键工艺参数之一,直接影响着激光淬火温度场的形成。激光淬火过程中,激光枪头相对于工件表面的位姿直接确定激光光斑的大小,从而间接影响着激光光斑能量的密度分布。所以对于激光淬火来说,确定工件安装的实际位置至关重要。本文提出了一个确定工件实际安装位置的方法,从而避免由于安装误差而造成的激光枪头的位姿误差。通过传感器检测出工件安装时的三个特征点的坐标位置以及工件理想安装位置的坐标位置求解转换矩阵。利用转换矩阵实现对淬火路径各点位的正确求解,从而为确定激光淬火枪头相对于实际工件的可靠淬火位姿提供正确的工件安装信息。

Laser spot energy density is key process parameters of laser quenching which has a direct impact on the temperature field formation of laser quenching. During laser quenching process,the laser nozzle position and gesture which is relative to the workpiece surface direct determine the size of laser spot. Therefore,it indirectly influences the energy density distribution of laser spot. In this paper,a method is proposed to determine the practical installation location of workpiece which can avoid the position and gesture error of laser nozzle. Three characteristic points' coordinates will be gotten by location sensor. Through computing,the transferring matrix will be founded which present the relation between the practical location and ideal location of workpiece. This transferring matrix can be used to computing the practical point's coordinates of laser quenching path. Therefore,the computing results will provide the information for correct position and gesture of workpiece relate to laser nozzle.