短电弧数控机床加工自适应补偿研究

Research on Adaptive Compensation of Short Arc NC Machine Tool

针对短电弧数控机床阴极电极直径无法精准检测的问题,提出一种阴极电极直径在线监测方法。利用此监测方法能准确获得阴极电极磨损量,通过数控机床的总线模块将阴极电极磨损量反馈至数控系统。数控系统通过驱动补偿轴动态调整阴极电极位置,确保阴极电极与阳极电极两者放电间隙在控制范围之内,保证加工的顺利进行。在此基础上提出一种短电弧数控机床加工自适应补偿方案,利用此方案可以实现机床自动加工,从而提高了短电弧机床的自动化程度。通过加工实验验证了此方法的可行性。

Aiming at the problem that the cathode electrode diameter of a short arc NC machine tool could not be accurately detected, a method for on-line monitoring of cathode electrode diameter was proposed. Using the monitoring method, the wear amount of the cathode electrode could be accurately obtained;through the bus module, the cathode electrode wear amount was feed back to the numerical control system. The numerical control system dynamically adjusted the position of the cathode electrode by driving the com pensating shaft to ensure that the discharge gap between the cathode electrode and the anode electrode was within the control range, and the processing was ensured to proceed smoothly. On this basis, an adaptive compensation scheme for short arc NC machine tools was proposed, by which automatic machining of the machine tool could be realized, thus the automation degree of short arc machine tools was improved.