There are many kinds of welding machines with different various purposes. Among of them, Tig welding is the difficult technique that requires welder with good knowledge and skills. Necessary tips in using TIG welding machines below:
First, in order to practice Tig welding, you should use a thick solder. When the thick solder you will have a large tank and easy control of the welding condition to make it easier for the welder to develop welding skills. In addition to the technique you need to pay attention to welding currents of about 50A, welding needles (tungsten electrodes) and offset rods.
How to use tig welding machine
Note: You need to have the ability to control the distance from the solder (tungsten electrode) to the solder to achieve a stable arc. During the welding process when the sitting position is comfortable, the two hands should not fall on the welding table
Using the Tig welding machine consists of 6 simple steps:
Step 1: Determine the welding material to select the needle
Welding materials: Iron, aluminum, steel, other hard materials
Solder needles for aluminum (welding nose is green), welding tips for other materials (red soldering tip).
Conclusion: Depending on the purpose of the various welding, the choice of welding needles are different.
Step 2: Adjust the welding current (including 3 parameters)
Arc welding currents
Air flow protection.
Coolant air flow.
Conclusion: Depending on the welding material that adjusts the various welding currents to match the welding torch speed and increase the life of the welding machine.
Step 3: Check the accessories attached to the welding machine
Pressure reducing valve and gas flowmeters.
Make sure the machine is turned off and fully closed valves are connected to the device.
All joints must be clean & sealed.
The conduit must be placed in a cool and safe place.
Conclusion: The design of the Tig welding machine consists of many joints between the supplying equipment, the welding machine and the welding torch. When connecting welding equipment, carefully check the same as above.
Step 4: Some basic operations before welding
The welding field away from the welding material.
Open the coolant valve.
Slowly open the gas valve.
Hold the soldering iron in hand and turn on the machine.
Check the water line that was turned on when you turned on.
When the engine is on, check the airflow by turning the air valve off.
Step 5: Perform the welding process
Causing the arc (Including 3 secondary arcing methods)
Flash: wipe the electrode into the weld, just for the weld and the weld will be punctured.
Lift: When touching the electrode down, press the lift switch to create the arc but difficult to arc.
High Frequency Arc: High frequency generates voltage, which is usually applied mainly.
Start welding when the arc is
The welding torch should be kept tilting about 20 degrees from the vertical and tilted in such a way that the tip of the welding rod is tilted in the direction of welding.
And the angle between the beak and the stick is usually 90 degrees.
The distance between solder rod and solder is 1-1.5 times the welding rod diameter.
Step 6: Turn off welding equipment at the end of material welding
Place the torch in a safe place.
Close the protective gas valve on the gas bottle.
Disconnect the coolant source.
Open the drain valve on the machine to drain the water out.
Disconnect the welding machine source
Conclusion: After the welding process is completed, you need to know the shutdown process, to use the machine safely and effectively.
For Tig welded to achieve superior weld quality, in the welding process you have to pay attention to a lot of things so you should practice each welding skill. First, you should practice with the arc length maintenance, followed by the welding of the torch. Once you have mastered the above two operations, you should practice with an arc and keep the size of the weld pool stable. Finally, use a stick, put the rod, dot rod into the weld pool. Thus, when you master all the above skills you will create quality welding to ensure high aesthetics.