The Development of Novel Numerical Control Rotating Pipe Tool & its Control System

A novel numerical control rotating pipe tool (RPT) was designed in order to producing seamless steel pipes with complicated gyrorotor outline. The digitizer-based manual/automatic control system was designed. The core of the control system are a central Industrial Personal Computer and a GT400 motion controller and with Panasonic PLC as the subcontrol. Fuzzy self-tuning PID controller and feedforward control strategy are adopted in the servo motors speed loop and the hydraulic cylinder position loop. The system has the function of teaching playback, which can be realized through digitizer and G codes, and the Internet-based remote supervision was realized. The smoothness of the steel pipes was guaranteed during the replay of the machining through data process. The machining efficiency, flexibility, reliability and precision of the system have been guaranteed with the combination of digitizer, PLC and G codes