Research On Automatic Control System Of Plane Hardfacing Welding Machine

With the improving of automatic welding machine, the automatization of hardfacing welding facility become an urgent problem which we should resolve as soon as possible. Hardfacing welding with hand is a type of work which is swinked, high-drain and low productive efficiency. So designing a kind of automatic hardfacing welding equipment with cost-effective approaches to improve productivity and work conditions will have a big market.This thesis studies a kind of automatic plane hardfacing welding control system with CO₂ welding technique. Its control center is singlechip and it makes the whole processing automatically. It also can automatically weld the workpiece which is frayed abnormally or frayed with different size. This paper introduced the design method and research process of the control system, including hardware design, software design and so on. The hardware circuits include thyristor direct current speed-governing system and the welding logic control circuits controlled mainly by PIC16F74 siglechip, and besides, the circuits have some measures of anti-jamming. The software is written by PIC assembly language. With soft hardware, the control system can achieve two kinds of welding methods, full welding and orientation welding by weld processing logic automatic control.Proved by experiment, this system have the following feature: Working continuously with highly automatic degree ; Having high stability and efficiency; Easily operated with low labor intensity; Getting raw materials easily and processing with low cost. With these advantages this system will have high practical value.