Looking for a job in burning TIG welding, how is TIG welding welded?

How old are you, can you only do argon arc welding?

Burning TIG welding skills

1. External filler can be usedFor priming and filling, it 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.

2. The inner filament can only be used for root welding, which is to use the thumb, index finger or middle finger of the left hand to cooperate with the wire feeding action, the little finger andRing fingerClamp the welding wire to control the direction, and the welding wire is close to the blunt edge on the inner side of the groove, and melt it together with the blunt edge for welding, and the groove gap is required to be greater than the diameter of the welding wire, yesplatesIf so, the wire can be bent into an arc.

3. Arc striking device (high-frequency oscillator or high-frequency pulse generator) is generally used, tungsten electrode and weldment do not contact to ignite the arc, and contact arc striking is used when there is no arc initiator (mostly used for construction site installation, especially high-altitude installation), which is availableCopperOr graphite is placed on the groove of the weldment to start the arc, but this method is more troublesome, less used, generally with a slight stroke of the welding wire, so that the weldment and the tungsten electrode are directly short-circuited and quickly disconnected and ignited the arc.

Property analysis. Argon arc is a kind of operation with both left and right hands at the same time, which is the same as the left hand to draw a circle and the right hand to draw a square in our daily life, so it is recommended to carry out similar training for those who have just begun to learn argon arc welding, which is helpful to learn argon arc welding.

When the molten pool is not fused well and the wire feed has a feeling of not being sent, it is necessary to reduce the welding speed or increase the welding current, if it is a root weld, the attention of the eyes should be concentrated on the blunt edge of the groove, and the afterglow of the corner of the eye is on the opposite side of the seam, and pay attention to the change of the rest of the height.

In our country, welding operations need to be licensed, welders are the type of work that belongs to the access category, in the professional qualifications of skilled personnel, only five of the 81 types of work in the access category, welders are one of them, and the actual situation is that most of the industry practitioners are unlicensed operations. With the continuous standardization of technology and the relevant requirements of the industry, more and more people want to take a welding certificate, the advantage of the certificate is still very large, first of all, the salary of the certificate and the non-certificate are very different, often able to reach more than double or higher level. Therefore, the issue of short-term welder training has naturally become a concern for practitioners.

Welding as an industrial "tailor" is a very important means of processing in industrial production, the quality of welding plays a decisive role in the quality of the product, so, what is the future development of welding technology?

Industry outlook. With the development of production, welding is widely used in aerospace, aviation, nuclear industry, shipbuilding, construction and machinery manufacturing and other industrial sectors, in China's economic development, welding technology is an indispensable means of processing. After entering the 21st century, welding is an important part of the manufacturing industry, and the rapid development, so it has brought unprecedented development opportunities to the welding industry.

At present, China consumes 300 million tons of steel every year (about tons of welded structure), and needs about 750,000 welding machines, and the welding industry will continue to grow in the next 8 10 years.

1. Argon protection can isolate the adverse effects of oxygen, nitrogen, hydrogen and other gases in the air on the arc and molten pool, reduce the burning loss of alloying elements, and obtain dense, spatter-free and high-quality welded joints;

2. The arc of argon arc welding is stable, the heat is concentrated, the arc column temperature is high, the welding production efficiency is high, the heat affected zone is narrow, and the weldment stress, deformation and crack tendency of the weldment are small;

3. Argon arc welding is open arc welding, which is convenient for operation and observation;

4. The electrode loss is small, the arc length is easy to maintain, and there is no flux and coating layer during welding, so it is easy to realize mechanization and automation;

5. TIG welding can weld almost all metals, especially some refractory metals and easily oxidized metals, such as magnesium, titanium, molybdenum, zirconium, aluminum, etc. and their alloys;

6. It is not limited by the position of the weldment, and can be welded in all positions.

TIG welding is GTAW.

Generally, the tungsten electrode specification is cerium tungsten electrode, and the current is controlled between 80 and 140, according to the plate thickness or wall thickness.

If welding thin steel plates,A current of 40 60 is sufficient.

Gas is generally said to be the flow rate, rarely talk about the pressure, the flow rate is generally 10 15l min.

For beginners, it is necessary to practice the basic skills first, that is, the posture, to ensure the stability of the welding gun, stability is very important for the control of the welding process, otherwise the welded weld is high and low, wide and narrow, and the weld is not straight.

1. Argon arc welding must be operated by a special person. 2. Check whether the equipment is noisy and whether the tools are good before work. 3. Check whether the welding power supply, the control system has a grounding wire, and the transmission part is lubricated.

The rotation should be normal, and the argon and water sources must be unblocked. If there is any water leakage, it should be repaired immediately. 4. Check whether the welding torch is normal and whether the ground wire is reliable.

5. Check whether the high-frequency arc striking system and welding system are normal, whether the wire and cable joints are reliable, and check whether the adjustment mechanism and wire feeding mechanism are in good condition for automatic wire argon arc welding. 6. Select the polarity according to the material of the workpiece, connect the welding circuit, use DC positive connection for general materials, and reverse connection or AC power supply for aluminum and aluminum alloy. 7. Check whether the welding groove is qualified, there shall be no oil stain and rust on the surface of the groove, and the oil and rust should be removed within 200mm on both sides of the weld.

8. Check the reliability of the fetal tool, and check the preheating equipment and temperature measuring instrument if the weldment needs to be preheated. 9. The argon arc welding operation button should not be far away from the arc, so that it can be closed at any time in the event of a failure. 10. When using high-frequency arc striking, it is necessary to check whether there is leakage.

11. If the equipment fails, the power should be cut off for maintenance, and the operator shall not repair it by himself. 12. It is not allowed to be naked and naked in other parts near the arc, and it is not allowed to smoke or eat near the arc, so as to avoid ozone and smoke inhalation into the body.

Summary. The construction site is looking for an argon welder to work.

That's it. Not a unit, it's a private boss at the construction site.

Like pressure pipes on a construction site.

Excuse me, where are you?

Jiangsu Province. It is possible to have this work in the construction of a small project in the thirteenth bureau.

But now I don't know if I'm still recruiting.

1. Welding example: the material for economizer, evaporation section pipe bundle, water wall and low-temperature superheater is 20 steel, and the high-temperature superheater tube is 12cr1mov.

2. Quasi-slip pure dispatch before welding: before welding, the nozzle should be beveled at 30°, and the metal color should be polished within 15mm inside and outside the pipe end. The pipe to the mouth clearance is 1 3mm.

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.

3. Operation: WST315 manual tungsten argon arc welding machine is used, and the welding machine itself is equipped with a high-frequency arc striking device, which can be used for high-frequency arc extraction. Arc extinguishing is different from electrode arc welding, if the arc extinguishing is too fast, 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 melt pool to slowly extinguish the arc, and finally close the shielding gas.

For No. 20 steel pipe with a wall thickness of 3 4 mm, the filling material can be TIGJ50 (for 12Cr1 MoV, 08CrMoV), the diameter of the tungsten rod is 2mm, the welding current is 75 100A, the arc voltage is 12 14V, the shielding gas flow rate is 8 10L min, and the power supply type is DC positive connection.

Summary. Hello, this mainly depends on the category of products operated by the iron factory, generally speaking, the products produced are large, then the welder has more work, if the product is small, then the argon arc welding work is more.

Hello, this mainly depends on the business history of the iron factory such as the category of products, a high failure in general, the production of products is large, then the welder has more work, if the product is small, the argon arc welding work than the limb Nianqi.

I'm 39 years old this year, I want to learn some technology, I want to go to school to specialize in learning and then take the exam, I don't know which one is better to choose a bench, which one is more used in real life, two guarantee welding, argon arc welding?

And that is to say, the rock hunger that destroys the old online direct test book and the fiber jujube promotion test is reliable, and I don't go to study when the time comes, if I don't go to school to live, I will directly find a master to bring, mainly because I also worked as a welder when I was in my twenties, and I worked with other masters, so I will see that I can also weld.

In real life, electric welding is used more.

Or do you have to go to school to study for a month? It's to learn the actual operation, I don't think there is no technology, I can't eat it, so I have a foundation, but I haven't touched it for so many years, but I feel like I can't forget it.

It is better to find a teacher to teach you directly.

Then there is no need to go to school to study, can you take a test directly online? Do you say that you don't need to be reliable for online exam books?

It's unreliable, and now the exams are all face recognition.

Is it okay for me to take the exam first and then study?

Yes

Kiss! Hello, happy to answer your <>

The welding method of argon arc welding is as follows: 1. Preparation before welding 1. Read the welding process card to understand the material of the welded workpiece, the required equipment, tools and related process parameters. 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. Second, the wire feeding can be used for priming and filling, is to use a larger current, the welding wire head is in the front of the groove, the left hand pinched the welding wire, and constantly sent into the molten pool for welding, the groove gap requirements are 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. 3. The welding handle is to press the nozzle nozzle slightly on the weld, and shake the arm greatly for welding. Its advantage is that the welding nozzle is pressed on the weld, and the welding handle is very stable in the operation process, so the weld is well protected, the appearance is very beautiful, the product qualification rate is high, especially the welding is very convenient, and the color of the very beautiful appearance can be obtained when welding stainless steel.

The disadvantage is that it is difficult to learn, and because the arm shakes widely, it is impossible to weld where there are obstacles. The mop is the welding nozzle gently leaning on or not leaning on the weld, the right little finger or ring finger is also leaning on or not leaning on the workpiece, the arm swings small, and the welding handle is dragged for welding. Its advantage is that it is easy to learn and has good adaptability, but its disadvantage is that the forming and quality are not as good as the crank handle, especially the upward welding without the crank is convenient for welding, and it is difficult to get the ideal color and forming when welding stainless steel.

Fourth, the arc is generally used arc starter (high-frequency oscillator or high-frequency pulse generator), tungsten electrode and weldment do not contact to ignite the arc, no arc starter is used contact arc (mostly used for construction site installation, especially high-altitude installation), copper or graphite can be placed on the weldment groove to start the arc, but this method is more troublesome, use less, generally with a light stroke of the welding wire, so that the weldment and tungsten electrode are directly short-circuited and quickly disconnected and ignited the arc. Hope mine can help you <>

Do you have any other questions?

Inert gas shielded arc welding with pure tungsten or activated tungsten (thorium-tungsten, cerium tungsten, zirconium tungsten, lanthanum tungsten) as non-melting electrodes, referred to as TIG welding.

Welding: Gas arc welding.

This is a welding method that uses an electric arc as a heat source and uses a gas shielded molten pool. The function of the gas is mainly to protect the molten metal from the influence of harmful elements such as oxygen, nitrogen, hydrogen and moisture in the air, but it also has a certain impact on the stability of the arc, the transition form of the molten droplet and the activity of the molten pool. As a result, the use of different gases will produce different metallurgical reactions and process effects.

The main characteristics of gas arc welding are that the arc is visible, the weld pool is small, it is easy to realize mechanization and automation, and the productivity is high. The rapid development of welding robots in the 70s of the 20th century is mainly used for resistance spot welding and gas arc welding. Gas arc welding is suitable for the welding of metals such as steel, aluminum and titanium, and is widely used in the manufacture of automobiles, ships, boilers, pipelines and pressure vessels, especially where high quality or full-position welding is required.

Gas arc welding can be divided into tungsten inert gas arc welding and MIG/MAG welding according to the electrode type.

Tungsten inert gas shielded welding is referred to as TIG welding. Tungsten rods are used as electrodes and argon or helium is used as shielding gases. The arc melts the base metal to form a joint, and if necessary, filler wire can be added (Fig. 1 Tungsten inert gas shielded welding).

Tungsten inert gas welding is characterized by a stable arc and easy control of the input energy. Therefore, it is mostly used to weld workpieces with high dimensional accuracy requirements, materials that are easy to overheat and embrittlement, and easy to oxidize in air.

MIG/MAG welding uses a continuously fed welding wire as the electrode and argon, carbon dioxide or a gas mixture as the protective gas (Fig. 2 MIG/MAG welding). Compared with tungsten inert gas shielded welding, this kind of shielded welding has a higher production rate and is widely used, second only to manual arc welding and submerged arc welding, and has a trend of further development. The welding wire can be solid wire or flux-cored wire.

MGG/MAG welding can be divided into inert gas shielded welding, carbon dioxide gas shielded welding and mixed gas shielded welding according to different types of shielding gases.

MIG/MAG welding: argon or helium is used as shielding gas. The inert shielding gas does not participate in the metallurgical reaction of the molten pool, and is suitable for the welding of various metal materials with high quality requirements or easy oxidation, such as stainless steel, aluminum, titanium, zirconium, etc., but the cost is higher.

Carbon dioxide gas shielded welding: carbon dioxide is used as the shielding gas. Carbon dioxide will decompose oxygen at high temperatures and enter the molten pool, so it is necessary to add an appropriate amount of deoxidizers such as manganese and silicon to the welding wire.

The main advantage of this type of protective welding is that it is less costly, but it can only be used for carbon steel and low alloy steel welding.

Mixed gas shielded welding: the shielding gas is mainly argon, and an appropriate amount of carbon dioxide (15 30) or oxygen ( is added. Compared with carbon dioxide gas shielded welding, this kind of shielded welding has a wider welding specification, better forming, and better quality; Compared with MIG/MAG, the molten pool is more active and the metallurgical reaction is better.