数控加工高速进给柔性控制技术研究

Research on flexible control technology of high speed feeding in the process of NC machining

针对数控系统直线插补控制造成的电机启停频繁、插补精度低、加工效率低等问题,以高速进给过程的柔性控制为目标,首先分析了直线插补原理的主要缺陷,在此基础上,提出一种微小直线段柔性插补和速度控制方法,并分别从柔性直线插补原理和柔性速度控制方法两方面进行了系统研究,通过对该方法的误差分析,结果表明该柔性直线插补控制方法可较好地适用于数控高精度机床的高速进给加工,避免了加工过程的冲击振动,同时提升了加工效率和表面质量。

Aiming at the problems of frequent start and stop,low interpolation precision and low machining efficiency caused by linear interpolation control of NC system, the main defects of the linear interpolation principle are analyzed firstly in the high - speed feed process. Then a flexible linear interpolation method and a flexible velocity control method are put forward respectively. Through study systematically and error analysis of the method, the results show that the flexible linear interpola- tion control method can be applied to high speed NC machining of high - precision machine tools to avoid the impact vibra- tion in the process of machining, while enhance the machining efficiency and surface aualitv.