High frequency principle of aotai argon arc welding machine

Gas control requirements: gas is required to come first and then go. Argon is an inert gas, which is easily decomposed. First, argon gas is filled between the workpiece and the electrode needle, which is beneficial to arc ignition; Maintaining gas supply after welding is helpful to prevent the workpiece from rapidly cooling and oxidation, thus ensuring good welding effect.

Requirements for controlling current by manual switch: When the manual switch is pressed, the current will be delayed relative to the gas, and the manual switch will be closed (after welding). After the delay as required, the gas supply current will be turned off first.

Generation and control requirements of high voltage: argon arc welding machine adopts high voltage arc initiation mode, which requires high voltage when arc initiation, and disappears after arc initiation.

Interference protection requirements: argon arc welding arc initiation high voltage is accompanied by high frequency, which seriously interferes with the whole circuit, and requires the circuit to have good anti-interference ability.

Four, the difference between argon arc welding machine and manual arc welding machine working circuit.

Argon arc welding machine and manual arc welding machine are similar in main circuit, auxiliary power supply, driving circuit and protection circuit, but it adds several controls on the basis of the latter: 1, manual switch control; 2. High frequency and high voltage control; 3. Boost arc ignition control. In addition, in the output loop, the argon arc welding machine adopts a negative output mode, and the negative electrode of the output is connected to the electrode needle and the positive electrode is connected to the workpiece.

I hope it helps you! Good luck!