Teaching course of sub-arc welding machine

The argon arc welding machine is used as follows:

1. Before welding, prepare an argon gas bottle and install an argon gas flowmeter on the bottle. Then connect the air pipe with the air inlet on the back plate of the welding machine, and the joint should be tight to prevent air leakage.

2. Connect the argon arc welding gun, gas connector, cable quick connector and control connector to the socket corresponding to the welding machine respectively. The workpiece is connected with the "+"connecting bolt through welding ground wire.

3. Connect the power cord of the welder and check whether the grounding is reliable.

4. After turning on the power supply, choose AC argon arc welding or DC argon arc welding according to the welding needs, and turn the line switch and control switch to AC or DC. Note: These two switches must be used synchronously.

5. Turn the welding mode switch to the "argon arc welding" position.

6. Open the argon bottle and flowmeter, and turn the gas test switch to the "gas test" position. At this time, the gas flows out from the welding torch. After adjusting the gas flow, pull the gas testing and welding switch to the "welding" position.

7, the size of the welding current, can use the current adjustment handwheel to adjust, clockwise rotation current decreases, counterclockwise rotation current increases. The current adjustment range can be limited by the current size changeover switch.

8. Select a suitable tungsten rod and its corresponding chuck, then grind the tungsten rod into a suitable taper and install it in the welding gun. After the above work is completed, press the switch on the welding gun for welding.