What should I do if there is a needle eye in TIG welding? How to end TIG welding without a small nee

This is the tungsten electrode distance from the workpiece (arc height) is not well controlled, manual tungsten argon arc welding in welding, pay attention to the arc height, the relationship between the nozzle size and the tungsten electrode diameter, the argon flow rate and the nozzle size, the welding torch angle and the position of the wire wire. Before welding, the workpiece needs to be polished and cleaned of impurities such as oil, water, paint and other impurities on the surface of the area to be welded.

According to what you said, the exhaust current function on the front panel of the welder should not be turned on.

Just turn on this feature. If the welder does not have this function, the torch can be stopped at the top of the melt pool for a few seconds after the arc is extinguished after welding, until the gas delay is no longer ejected. The defect of pinhole welding is that the weld has not yet cooled, and the welding torch is lifted without argon gas to protect it.

The molten pool invades the small pores caused by the air.

Argon arc welding will have a small needle eye in the welding process, which generally occurs often during arc retraction, which refers to the completion of welding or the need to change the welding wire, and the welding torch stops working. When the arc closing speed is too fast when the welding is completed, the argon will dissipate immediately, which can not well protect the unshaped melt pool, when the argon dissipates after the unformed melt pool contacts the air, there will be a reaction with needle eyes, bubbles, etc. This can also happen when the argon gas is impure and the weld is not clean, but not very much, and these problems are dealt with in advance and can be ignored when the argon arc welding starts to work.

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1. Causes of stomata

1) The weld was not cleaned in time. If not removed in time, it will cause no fusion during welding, and wrinkled skin will be formed on the surface of the weld surface or internal pores and slag inclusions will be formed on the surface of the weld, which will directly affect the welding quality.

2) The wind speed is too high when working. When the actual counterpart gap is too large, the transition layer needs to be surfacing on the bevel side of the pipeline. Set up temporary shelter facilities to strictly control the wind speed at the welding operation, because the wind speed exceeds a certain range, it is easy to produce pores.

2. Causes of cracks:

1) Arc extinguishing too fast. Arc extinguishing is different from electrode arc welding, if the arc is extinguished too quickly, it is easy to produce arc pit cracks, so the weld pool should be led to the edge or thicker part of the base metal during operation, and then gradually shrink the molten pool and slowly extinguish the arc, and finally close the shielding gas.

2) Use hot die casting mold. Hot die casting molds often have tortoiseshell cracks, most of which are caused by thermal stress, but also caused by surface oxidation or corrosion of die casting raw materials, heat treatment to adjust to appropriate hardness to improve its life, too low or too high hardness is not applicable.

The appearance of a small needle hole is an arc shrinkage hole.

When the arc is closed, it is necessary to stay slightly, fill the wire, and replenish the molten pool at the arc retraction, so that there will be no shrinkage holes.

To put it simply, when the arc is closed, add more wire, or weld two more times to fill the arc pit.

At the end of argon arc welding, frequent gun arrest to fill the arc pit, and then the arc pit can also be lowered to guide the arc to the lower temperature part to stop the arc.

Hello dear, argon arc welding has a small eye at the end of the arc welding is due to the welding completion of the arc speed is too fast, argon will dissipate immediately, can not be a good protection of the unshaped melt pool, when argon dissipates after the unformed melt pool contact air will react, needle holes, bubbles, etc. This will also occur when the argon is impure and the weld is not clean, and it is not very much to not let the reeds pass, and these problems are dealt with in advance when the argon arc welding starts to work, which can be ignored. In order to avoid the appearance of the needle when the arc is closed, when the welding is about to be completed, the wire feeding should be slow, and when the melt pool is filled with the welding wire, stop the wire feeding, and the welding gun will continue to supply air for 5-10 seconds, and the welding gun can be picked up when the weld is cooled down, so as to ensure the high quality of the weld bead, the appearance is good-looking, and the appearance of the needle eye can be prevented.

What is the reason why tungsten needles are always injected during TIG welding? Hello dear, argon welding machine burns tungsten needle I think there are the following reasons: a:

There is a problem with the welding machine itself, the service life of the welding machine is very long, and the electronic components in the machine are aging, and the only way to change the welding machine is in this situation. 2: The output electrode is reversed, and it can be solved by replacing it with the correct connection.

Three: argon is not pure, argon flow is too small, or there is dirt on the surface of the weldment, such as paint oil, etc. Four:

If the gap between the tungsten needle and the weldment is too small or too large, it will cause the tungsten needle to burn. Five: too much current or too long time will also cause tungsten needle burning.

The reason for the pinhole in the arc of argon arc welding is that the residence time of the welding wire is short and the filler metal is not enough. Improper arc tightening and arc breakage form low-lying sections at the end of the weld bead.

Argon arc welding technology is based on the principle of ordinary arc welding, using argon gas to protect metal welding consumables, through high current to make the welding consumables melt into a liquid state on the welded substrate to form a solution pool, so that the welded metal and welding consumables to achieve metallurgical combination of a welding technology, also known as argon gas shielded welding. According to the different electrodes, TIG welding can be divided into two types: MIG welding and non-MIG welding.

The solution to being hit by argon arc welding to the eye is as follows:

1. Wash your face repeatedly with clean water, focusing on washing your eyes;

2. Hold the water in your hand and pluck it on your eyes, the time is 3 to 5 minutes, and repeat this action after a period of time;

3. Use a cool hand towel before going to bed at night, which can effectively reduce the pain in the eyes.

The solution to being hit in the eye by TIG welding is as follows:

1. Wash your face repeatedly with clean water, focusing on washing your eyes;

2. Hold the water in your hand and pluck it towards your eyes for 3 to 5 minutes, repeating this action after a period of time;

3. Use a cool hand towel before going to bed at night, which can effectively reduce the pain of the limbs and eyes in the eye hall.