Automatic welding machine is used for automatic production, which requires manual or manipulator to move up and down the workpiece, welding fixture to automatically fix and position the workpiece, automatically start the arc of welding power, automatically feed wire and move the welding gun or workpiece, automatically return after welding, and manually or manipulator to take down the workpiece. It is mainly composed of welding system, mechanical system and electrical control System composition.

電氣系統

electrical system

電氣控制系統主要控制夾具的裝夾和定位，焊機的啟動和停止，焊槍或工件的運動，輸送裝置的進出等等。含自動/手動轉換，收弧有無控制，焊接速度的調整和顯示，焊接電源的開關及急停開關等。

The electrical control system mainly controls the clamping and positioning of the fixture, the start and stop of the welding machine, the movement of the welding gun or workpiece, the in and out of the conveying device, etc. Including automatic / manual conversion, arc control, welding speed adjustment and display, welding power switch and emergency stop switch, etc.

電氣控制系統一般由繼電器、PLC可編程控制器、單片機、數控系統、計算機控制。在焊接生產現場，由于焊接飛濺多，水電氣線路復雜，電磁干擾大，所以常使用的繼電器、PLC、數控系統。而PLC由于兼顧了繼電器的功能，又可以實現編程控制。

Electrical control system is generally controlled by relay, PLC programmable controller, single chip microcomputer, numerical control system and computer. In the welding production site, because of the welding spatter, water and electrical circuit complex, electromagnetic interference, so the most commonly used relay, PLC, CNC system. PLC can realize programming control because it takes into account the function of relay.

隨著技術的發展和新產品的出現，現在的PLC還能實現更加復雜的功能，如部分數控功能，如圓弧插補等。所以PLC控制技術在自動焊接專機里得到了廣泛的應用。

With the development of technology and the emergence of new products, now PLC can achieve more complex functions, such as some CNC functions, such as arc interpolation. So PLC control technology in automatic welding machine has been the most widely used.