Study Of The WEDM Gap State Control System

Electric Discharge Machining (EDM) is a new type of nontraditional machining and has been developing for a few decades. Now EDM is heading towards high efficiency, high accuracy and intelligence. Wire Cutting Electrical Discharge Machining (WEDM) is an important research field of non-traditional machining, which deals with materials that are difficult to machine and work piece with complicated surface. For WEDM, the discharge gap control technology is a very important technology, which has a direct impact on the performance of the process of stability and processing quality. Under this research background, the present paper has carried on the research design to the WEDM Gap State control system.Based on WEDM principle, this article has studied the detection status in quo of the WEDM gap state, and has presented the control technology development and the tendency, proposed the control system overall project design.The control system consists of hardware and software.The control system hardware has designed the power simulation part, the voltage detection circuit, the comparison circuit of voltage, the circuit of analog-to-digital and digital-to-analog, and the microcontroller AT89C51 system; analyzed in detail various electrical equipment component composition and their corresponding chip;introduced the ISA bus structure characteristics.In the field of the software, the paper has researched the WEDM Gap State control algorithm and carried on the design to the gap state control procedures; to resolve the control card and PC communication problems, make full use of PC resources, have designed the Gap State control system drivers owing to Windows 2000 WDM model.