基于交流伺服和步进驱动控制的玻璃数控钻孔技术研究

NC controlled glass drilling technology based on AC servo and stepper drive control

针对数控玻璃钻孔过程中钻头定位不准和钻孔稳定性差等问题,将交流伺服和步进驱动技术应用于玻璃钻孔设备中,对高精度玻璃立式钻孔设备结构和工作原理进行了研究,建立了完整的高精度数控玻璃钻孔设备控制系统结构,提出了一种基于交流伺服驱动的钻头位置控制方法和基于步进电机的双钻头进给钻孔方法。在后期生产实验过程中,对中心孔误差、孔与基准边误差和钻孔同心度误差等加工参数进行了评价。研究结果表明,交流伺服驱动中的半闭环反馈增强了定位系统对负载的抗干扰能力,有效地减少了定位过程中的稳态和动态误差,通过采用步进驱动的双钻头机构通过对进给速度和进给量的精确控制进一步提高了钻孔质量,利用上位机软件可以对加工参数进行设置和实时监控,实现了自动化生产。

Aiming at the problems of drill positioning inaccuracy and unreliability in the process of NC glass drilling,the AC servo and stepper driving technique was investigated. After the analysis of the structure and principle of the vertical high precision positioning glass drilling equipment,a high precision positioning control system was established, A method was presented to control drill position based on AC servo driving system and to drive the dual-drill feeding based on stepping motor. The error of centre hole size, position （referred to reference）and concentricity were tested. The results indicate that half closed loop feedback control system in AC servo driving system has enhanced anti-interference ability and decrease stable and dynamic error in the location process. And drilling quality has been enhanced by controlling speed and feeding of stepper dual-drill. Automatic production can be accomplished by parameters setting and real-time monitoring with interactive software.