高速精密激光加工控制系统及其在陶瓷切割中的应用

High Speed Precision Laser Machining Control System and Its Application in Ceramic Cutting

将GALIL运动控制卡应用于高速精密激光切割控制系统中,并对其在陶瓷切割中的应用进行了研究,结果表明,高精密激光控制系统误差主要来源包括拐角速度规划误差、直线替代曲线插补弓高误差、控制系统自身误差。控制系统主要通过弓高误差对加工精度进行衡量,速度规划和直线代替曲线插补引入两类误差的合成就是实际加工误差。圆上出现波浪形是因引入拐角速度规划造成的。在圆的直径大于1 mm时,其多数相对误差低于0.5%,因而可将精度量级推算出,为10 mm。圆的直径与其拐弯时间具有正相关关系,即当改变圆的直径时,拐弯时间也会随着圆直径的增大而增大,而不断的增加圆的直径,波浪也就越明显。而当插补步长的值为定值的时候,曲率半径越小弓高误差较大。与大圆弓高误差相比,小圆弓高误差要比较明显。

In this paper,GALIL motion control card is applied to high-speed precision laser cutting control system,and its application in ceramic cutting is studied.The results show that the error of high-precision laser control system mainly comes from corner velocity planning error,straight line interpolation bow height error and control system self-error.The control system mainly measures the machining accuracy by bow height error.The combination of speed planning and straight line interpolation is the actual machining error.Waves on the circle are caused by the introduction of corner velocity planning.When the diameter of a circle is greater than 1 mm,most of the relative errors are less than 0.5%,so the accuracy can be calculated to be 10 mm.When the diameter of a circle is different,the longer the turning time is,the larger the diameter,the more obvious the wave is.When the interpolation step is fixed,the smaller the curvature radius,the higher the bow height,the greater the error.Compared with the big bow height error,the small bow height error is more obvious.