What is the reason for high frequency spark and no arc in argon arc welding machine?

First of all, it is necessary to determine whether there is a sound of high-pressure ignition. If there is no sound, check whether the contact switch and the wire are in good contact. Then check the high-voltage circuit to see the capacity of the high-voltage capacitor. High frequency inductance also has a lot to do with it. Many argon arc welding machines have been repaired, and Wuxi welding machine is the most common one.

If there is high frequency, change to a gas-electric integrated connector or a quick connector.

Try to adjust the discharge nozzle a little further. When the welding switch with the tungsten electrode 0.5CM away from the weldment is turned on, there is no high-frequency electron beam arcing. If not, there is something wrong with the arcing circuit.

It may be that the switch wire is broken. You can unplug the switch and connect it with a flat screwdriver to see if it is useful. Listen to the sound of electromagnetic valve suction.