关键词: 机械制造工艺与设备, 特种加工, 电解加工机床, 集成系统, 协同控制, 故障诊断

Abstract: In order to improve the electrochemical machining precision, reliability and efficiency of the work pieces such as aero-engine blisk, automobile engine nozzle, etc, a new control system for electrochemical machining(ECM), which integrates machine motion, electrolyte conveying, temperature control, power supply and electrode vibration into one, is set up. A new multi-system control strategy and a fault diagnosis method are proposed. The integrated control system is composed of a main controller and several sub-controllers. The distributed architecture and modularized design are adopted in hardware structure. The collaborative control method based on multi-system is used in control strategy. The subsystems are controlled by the respective controller, and the sub-controllers are managed by the main controller; therefore, the whole system can be effectively controlled. In the failure diagnosis, a prefect machining information acquisition system is created, and the status of electrochemical machining is diagnosed by the procedures of feature extraction, processing and pattern recognition. The experiments prove that the control system has the high integration, fast response, convenient operation and high work efficiency. The multi-system can be used to avoid successfully the damage to work-piece and machining system caused by failures and improve the processing reliability.

Key words: manufaturing technology and equipment, non-traditional machining, electrochemical machining, integration system, collaborative control, fault diagnosis