TIG welding wire in skills, TIG welding wire video

Practice makes perfect, and the same is true for argon arc welding and wire insertion.

Filament: Divided into internal filament and external filament.

The outer filler wire can be used for priming and filling, which is to use a larger current, the welding wire head is on the front of the groove, the left hand pinched the welding wire, and constantly sent to the molten pool for welding, and the groove gap is required to be small or no gap. The advantages are that the current is large and the gap is small, so the production efficiency is high, and the operation skills are easy to master. The disadvantage is that if it is used for priming, the operator cannot see the blunt edge melting and the reverse side residual height, so it is easy to produce unfused and undesirable reverse forming.

The inner filler wire can only be used for root welding, which is to use the left thumb, index finger or middle finger to cooperate with the wire feeding action, the little finger and ring finger clamp the wire to control the direction, and the welding wire is close to the blunt edge on the inside of the groove, and melt together with the blunt edge for welding, requiring the groove gap to be greater than the diameter of the wire, and the wire can be bent into an arc if it is a plate. Its advantage is that because the welding wire is on the reverse side of the groove, the blunt edge and the melting of the welding wire can be clearly seen, and the residual height of the eye can also be seen on the opposite side, so the weld is well fused, and the residual height and non-fusion on the reverse side can be well controlled. The disadvantage is that the operation is difficult, and the welder is required to have more proficient operation skills, because the gap is large, so the welding amount is increased accordingly, the gap is large, so the current is low, and the work efficiency is slower than that of the external filler.

TIG welding wire feeding methods and skills, the master explains in detail, which one are you suitable for.

You put your hands on a point of support, like leaning on your legs, or relaxing your arms without pushing too hard...

The tip of the gun is aligned with the welding wire, and it is stable when it finds support like gas cutting.

Actually, I think as a beginner, it's best to use the previous click-in method first. I think the most important point of the method is to master the welding speed, as long as the speed is mastered, you will have a feeling for it. I believe that no matter what you call the "silk" technique, it will be easy for you to solve it in the end.

I'll help you analyze the reasons for this question, and the rest of the practice is up to you.

There is a plug of the welding wire together into a small bubble, remember that there are only two reasons, I will help you find out the reason and then you will be able to solve the problem (1, the welding current is too small so that the welding wire can not be completely melted and form a pile of molten iron of the welding wire, as the saying goes, not welded through. 2. In the case that the current is too high, the switching frequency is too fast, which will also make the welding wire fail to melt. ）

Solution: 1. Adjust the welding current to the best parameter according to the thickness of the material. In general, 60-120 amps is recommended.

2. It is better to slow down your welding speed appropriately, so that the material can be welded through without burning through and without deformation.

Please refer to the above two solutions for the phenomenon that the welding wire does not go, and then improve your operation skills to be able to operate smoothly and freely.

It is estimated that the building owner welded a thin decorative plate, not a thick industrial plate.

So the upstairs method is more suitable for the landlord.

Wire adding is an advanced technology, and it is the most important one to distinguish argon arc welders from ordinary welders.

It is an old argon arc welder who has been working for more than ten years, and he can not fill the wire without filling.

The welding wire is not left there and should be added according to the height of the molten pool level.

Add one drop at a time, it is sent to the edge of the molten pool, not to the tungsten electrode, and when the drop is finished, the welding wire will be withdrawn, but do not leave the argon protection area.

The average person is stupid with his left hand, so practice slowly, and coordinate his movements with his left hand + right hand + eyes.

There are two wire feeding methods: manual and automatic.

1. The principle of argon arc welding: Argon arc welding is a welding method that uses inert gas argon as a shielding gas.

2. The characteristics of argon arc: (1) the weld quality is high, because argon is an inert gas, does not react chemically with metal, the alloying elements will not be burned, and argon is not melted in metal, the welding process is basically the process of metal melting and crystallization, therefore, the protection is better, and the weld can obtain more pure and high-quality welds, (2) the welding deformation stress is small, because the arc is compressed and cooled by the argon gas flow, the arc heat is concentrated, and the temperature of the argon arc is very high, so the heat affected zone is small, Therefore, the stress and deformation are small during welding, and it is especially used for thin parts welding and pipe root welding. (3) Wide range of welding, almost all metal materials can be welded, especially suitable for welding metals and alloys with active chemical composition.

3. Classification of argon arc welding: Argon arc welding can be divided into tungsten argon arc welding (non-melting electrode) and melting electrode argon arc welding according to the different electrode materials. According to its operation method, it can be divided into manual, semi-automatic and automatic argon arc welding.

According to the power supply, it can be divided into DC argon arc welding, AC argon arc welding and pulse argon arc welding.

4. Preparation before welding

1) Read the welding process card to understand the material of the welding workpiece, the required equipment, tools and related process parameters, including the selection of the correct welding machine, (such as welding aluminum alloy needs to use an AC welding machine), the correct selection of tungsten electrode and gas flow, first of all, to know the welding current and other process parameters from the welding process card. Then choose tungsten electrode (generally speaking, the diameter is used more, its current response range is 150A-250A, except for aluminum) Then according to the diameter of the tungsten electrode, the size of the nozzle is the inner diameter of the nozzle D = (where d represents the inner diameter of the nozzle (mm), dw represents the diameter of the tungsten electrode (mm) Finally, the gas flow rate is selected according to the inner diameter of the nozzle, and the multiple of the inner diameter of the nozzle is the flow rate of gas. q=(, where q represents the gas flow rate (l min) The tungsten electrode should not exceed the inner diameter diameter of the nozzle, otherwise it is easy to produce pores.

2) Check whether the welding machine, gas supply system, water supply system and grounding are in good condition.

3) Check whether the workpiece is qualified:1Whether there is oil, rust and other dirt (the weld must be clean and dry within 20mm) 2

Whether the bevel angle, clearance, and blunt edge are appropriate. If the groove angle and gap are large, the welding amount is large, and it is easy to produce welding nodules. If the groove angle is small, the gap is small, and the blunt edge is thick, it is easy to produce non-fusion and impenetrable welding.

Generally speaking, the groove angle is 30-32 degrees, the gap is 0-4mm, the blunt edge is 0-the wrong side can not be too large, generally within 1mm. 4.Whether the length and number of points of positioning welding meet the requirements, and the positioning welding itself should be free of defects.

Take the low point of the welding torch, the current should not be too large, it should be appropriate, and the welding wire should be increased with the forward speed of the weld pool.

Maybe the current you use is a bit large, and then it burns for a long time.

Argon arc welding technology network, everything else is blind.

There are nine kinds of TIG welding wire feeding techniques, see which wire feeding method is suitable for you, choose one.

Argon arc welding seamless steel pipe can also make the inner wall welded full without adding wire, if you have to add wire, you must master the width of the breach and the welding current of the bottom.

You didn't know enough what kind of pipe to weld, this is very important.