Welding rod will often be due to moisture absorption and the process performance deteriorates, resulting in arc instability, spatter increase, and easy to produce pores, cracks and other defects. Therefore, the electrode must be strictly dried before use.

General acid electrode drying temperature 150 ~ 200℃, time 1 hour; The drying temperature of alkaline electrode is 350 ~ 400℃, and the time is 1 ~ 2 hours. After drying, it is placed in the thermal insulation box of 100 ~ 150℃.

After the electrode is damp, the general medicine skin color is dark, the electrode collision loses the crisp metal sound。

Influence of damp electrode on welding process:

(1) The arc is unstable, the splash is increased, and the particles are too large.

(2) deep penetration, easy to bite edge.

(3) The slag is not covered well and the welding wave is rough.

(4) It is difficult to remove slag.

             Influence of damp electrode on welding quality:

(1) easy to cause welding cracks and pores, especially alkaline electrode.

(2) The values of mechanical properties are easy to be low.

HUARUI E4303 J422 Electrode Holder Wleding Rod Welding Electrode Low Carbon Steel Welding Rod

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CO2 MIG welding is one of the welding methods, which is based on carbon dioxide gas as a protective gas for welding. In the application of simple operation, suitable for automatic welding and all-round welding. No wind during welding, suitable for indoor work. The full name of carbon dioxide shielded welding is carbon dioxide gas shielded arc welding. The shielded gas is carbon dioxide, and sometimes the mixture of carbon dioxide and argon is used. This welding technology is mainly used for manual welding.

In the application of simple operation, suitable for automatic welding and all-round welding. Poor wind resistance during welding, suitable for indoor work. Due to the special influence of zero thermal and physical properties of carbon dioxide gas, when using conventional welding power supply, it is impossible for the molten metal at the end of the wire to form a balanced axial free transition, usually need to use short circuit and melt drop neck burst, therefore, such as the use of high quality welding machine, the parameter selection is appropriate, you can get a very stable welding process, so that the splash reduced to the minimum degree.

Advantages of CO2 MIG welding:

1. Low welding cost. Its cost is only 40~50% of submerged arc welding and electrode arc welding.

2. High production efficiency. Its productivity is 1~4 times that of electrode arc welding.

3, easy to operate. Open arc, the thickness of the workpiece is not limited, can be welded in all positions and can be welded downward.

4. High cracking resistance of weld. The weld has low hydrogen and less nitrogen content.

5. Small deformation after welding. The angular deformation is 5 parts per thousand, and the unevenness is only 3 parts per thousand.

6, welding splash small. Welding spatter can be reduced when using ultra-low carbon alloy wire or flux-cored wire, or adding argon gas to carbon dioxide.

Harmful substances produced by CO2 MIG welding can be divided into two categories:

One is harmful gases: carbon dioxide (CO2), carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3)

One is soot: iron trioxide (Fe2O3), silicon dioxide (SiO2), manganese oxide (MnO), other impurities

These harmful substances, in addition to carbon dioxide is in order to protect the arc and weld pool, from the torch ejection, welding is not finished and left around the welding area, the rest of the harmful substances are produced from the welding arc and weld pool.

Due to the low cost of gas shielded welding, carbon dioxide gas is easy to produce, widely used in enterprises of all sizes, the price of the protective gas is low, the short circuit transition weld formation is good, and the use of deoxidizing agent containing welding wire can be obtained without internal defects of high quality welding joint. Therefore, this welding method has become one of the most important welding methods for ferrous metal materials.

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1. Electrode arc welding:

Principle - Arc welding method with manual operation of the electrode welding. The stable burning arc established between the electrode and the weldment is used to melt the electrode and the weldment so as to obtain a strong welded joint. It is gas-slag combined protection.

Main features - flexible operation; Low assembly requirements for welded joints; Weldable metal material wide; Low welding productivity; Strong dependence on weld quality (depends on the welder's operating skills and field play).

Application - widely used in shipbuilding, boiler and pressure vessel, machinery manufacturing, building structure, chemical equipment and other manufacturing and maintenance industries. It is suitable for welding of all kinds of metal materials, all kinds of thickness and all kinds of structural shapes.

2. Submerged arc welding (automatic welding) :

Principle - The arc burns under the flux layer. The heat generated by the burning arc between the wire and the weldment is used to melt the wire, flux, and base metal (the weldment) to form a weld. It is slag protection.

Main features - high welding productivity; Good weld quality; Low welding cost; Good working conditions; It is difficult to weld in spatial position; High quality requirements for weldment assembly; Not suitable for welding thin sheet (welding current less than 100A, arc stability is not good) and short weld.

Application - widely used in shipbuilding, boiler, bridge, lifting machinery and metallurgical machinery manufacturing. Submerged arc welding can be used in welds where the weld can be kept horizontal or the inclination Angle is not large. Plate thickness must be greater than 5 mm (burn through). Welding carbon structural steel, low alloy structural steel, stainless steel, heat-resistant steel, composite steel, etc.

3, CO2 Shielded Welding Torch (automatic or semi-automatic welding) :

Principle: Fusion electrode arc welding using carbon dioxide as a protective gas. It is gas protection. Main features - high welding productivity; Low welding cost; Small welding deformation (arc heating concentrated); High welding quality; Simple operation; High splash rate; It is difficult to weld with AC power; Poor wind resistance; Non - ferrous metals which are easily oxidized cannot be welded.

4, MIG/MAG welding (melting extremely inert gas/active gas welding) :

MIG welding principle -- an arc welding method using inert gas as protection gas and welding wire as melting electrode. The shielding gas is usually argon or helium or a combination thereof. MIG uses an inert gas, while MAG adds a small amount of active gas, such as oxygen and carbon dioxide gas, to the inert gas.

5. TIG welding (tungsten inert gas shielded welding)

Principle - Under the protection of inert gas, using the arc generated between the tungsten pole and the weldment to melt the base metal and the filler wire (or no filler wire) to form a welding seam. Electromelting is extremely low during welding.

6. Plasma welding

Principle -- A method of welding plasma arc with high energy density by means of the constraint effect of water cooled nozzle on the arc.

Welding precautions:

1、the length of the arc

     The arc length is related to the type of electrode coating and the thickness of electrode coating. But all should be taken as short arc as possible, especially low hydrogen electrode. Long arcing may cause air holes. The short arc can avoid the harmful gases such as O2 and N2 from the atmosphere from invading the weld metal, forming bad impurities such as oxides and affecting the quality of the weld.

2.  Speed of welding

The appropriate welding speed is based on the diameter of the electrode, the type of coating, welding current, the heat capacity of the welded object, the beginning of the structure and other conditions have their corresponding changes, can not be made standard provisions. Keep proper welding speed, molten slag can cover the molten pool well. All kinds of impurities and gases in the molten pool have sufficient time to emerge, to avoid the formation of slag inclusion and porosity of the weld. If the rod speed is too fast in welding, the shrinkage stress will increase when the welding part is cooled, so that the weld will have cracks.

The main points of welding wire selection

     The selection of welding wire should be based on the type of steel to be welded, quality requirements of welding parts, welding construction conditions (plate thickness, groove shape, welding position, welding conditions, post-welding heat treatment and welding operation, etc.), cost and other comprehensive considerations.

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1）This process is suitable for the welding of various large steel structures of low carbon steel and low alloy high strength steel. It has high welding productivity, good crack resistance, small welding deformation, large deformation range, and can be used for welding of thin and medium thickness plate parts.

1. Joint cleaning before welding requires that burrs, oil, rust and dirt affecting weld quality within 30mm on both sides of the groove must be cleaned.

2. When the construction environment temperature is below zero or the carbon equivalent of steel is greater than 0.41%, and the structural rigidity is too large, the object is thick, preheating measures should be adopted before welding, preheating temperature is 80℃~100℃, preheating range is 5 times of plate thickness, but not less than 100mm.

3. When the thickness of the workpiece is greater than 6mm, in order to ensure the penetration strength, the butt edge of the plate should be cut V-shaped or X-shaped groove, groove Angle is 60°, blunt edge p is 0~1mm, assembly gap b is 0~1mm; When plate thickness difference ≥4. Depending on your welding position if it is full position welding, the plate is not thick, the current is between 100 and 200. Voltage BETWEEN 18 and 25. It depends on the performance of your welder and the wire used.

2）How should the welding current of the second welding technology be adjusted?

Two welding arc position: generally at the beginning of the welding end 15-20mm arc, from the end of the normal welding, this is based on the thermal ionization of gas away from the design, because the higher the temperature, the easier the thermal separation, arc easy to produce. Call it: preheating method arc. Render. Generally, the current coarse adjustment and fine adjustment 1 grade, 2 grade, fine adjustment has 10 grade and wire feeding speed is proportional to, the more crisp the welding sound, the better the welding effect of the specific current adjustment has a formula, familiar with the current can be large or small, see their own technique. To see the thickness of the welding base metal and adjust, the voltage is proportional to the current, the voltage is too high splash will be more, and too low, the welding wire and the base metal does not melt.

3）How to operate the technology of secondary protection welding

Left welding, current voltage with good, stable arc combustion, welding wire end with a slightly larger than the wire diameter of the small molten ball is appropriate. As for how thick the base material with how much current can only be mastered in practice. Two welding welding skills, welding torch low, the protection of the gas, generally used left and right swing or swing back and forth, forward welding. Keep your hands steady.

Matters needing attention:

1. The joints with vertical or inclined openings must be welded from bottom to top, and the thin plate butt and vertical fillet welding without opening openings can be welded downward; Flat, horizontal and vertical butt joints can be welded to the left.

2. When the wind speed is greater than 1m/s, take windproof measures.

3. A reasonable welding sequence must be selected according to the structure of the welder.

4. Arc-starting and arc extinguishing plates with appropriate size should be set at both ends of the butt joint.

5. Clean up the dirt and spatter in the hose regularly.

6. Groove groove seam, especially thick plate multi weld, welding wire swing on both sides of the groove should be slightly stopped, the thickness of each layer of serrated strip is not more than 4mm, in order to make the weld fusion good.

7. According to the diameter of the welding wire, choose the electrode of the welding wire correctly, and the length of the welding wire should be controlled within 10 times the diameter of the welding wire.

8. When welding the wire feeding hose, it must be pulled smoothly, not coiled, and the radius of the wire feeding hose should not be less than 150mm. The remaining impure gas in the air supply hose should be discharged before welding.

     9. The aperture of the conductive nozzle increases after wear, resulting in unstable welding. It is necessary to replace the conductive nozzle.

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Sources and hazards of radiation

The thorium tungsten pole used in argon arc welding and plasma arc welding contains 1-1.2% thorium oxide. Thorium is a radioactive substance, which is affected by radiation during welding and contact with thorium tungsten rod.   

Radiation acts on the human body in two forms: one is external irradiation, the other is through the respiratory and digestive systems into the body to occur internal irradiation. A large number of investigations and measurements on mask argon arc welding and plasma arc welding have proved that their radioactive harm is small, because thorium tungsten rod consumed only 100 -- 200 mg per day, the radiation dose is very small, little impact on human body.

But there are two things to watch out for:

First, when welding in the container, ventilation is not smooth, the radioactive particles in the dust may exceed the health standard;

Second, the concentration of radioactive aerosol and radioactive dust can reach or even exceed the hygienic standard when grinding thorium-tungsten rods and the places where thorium-tungsten rods are present.

    Radioactive material invasiveness INSIDE the BODY CAN CAUSE chronic radiation disease, the main performance IS weakened in general functional state, can see obvious frailty, the resistance to infectious disease is reduced obviously, weight reduction and other symptoms.

Measures to prevent radiation injury

⑴ Thorium tungsten rods should have special storage equipment, stored in large quantities should be hidden in the iron box, and installed exhaust pipe。

⑵ When the sealed cover is used for welding, the cover body should not be opened in the operation. When the manual operation is performed, the air supply protective helmet or other effective measures must be worn.

(3) Special grinding wheel should be equipped to grind thorium tungsten rod, the grinding machine should be installed with dust removal equipment, the grinding debris on the ground of the grinding machine should be wet cleaned often, and concentrated deep burial treatment.

⑷ Dust mask should be worn when grinding thorium tungsten rod. Wash hands with running water and soap after contact with thorium tungsten rods, and wash clothes and gloves frequently.

⑸ Select reasonable specifications when welding and cutting to avoid excessive burning of thorium tungsten rod.

⑹ As far as possible, use cerium or yttrium tungsten rods instead of thorium tungsten rods, because the latter two are non-radioactive.

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Possible causes of arc instability

①The size of the conductive nozzle hole is not suitable

② conductive nozzle wear

③ The welding wire is not stable

④ Network voltage fluctuation

⑤ The distance between the conducting nozzle and the workpiece is too large

⑥ The welding current is too low

⑦ The ground is not solid

⑧ Welding wire diameter is not suitable

Elimination method

① A conductive nozzle matching the diameter of the welding wire should be used

② The hole in the conducting mouth may become larger, and the conduction is poor

③ The wire winding is too messy, the wire circling is stable, the wire feeding wheel size is appropriate, the pressure roller is too small, the curvature of the guide tube may be too small

④ The primary side voltage should not change too much

⑤ The distance should be 10 to 15 times the diameter of the wire

⑥ Use a current appropriate to the diameter of the wire

⑦ It should be grounded reliably (due to base metal rust, paint and grease, the contact is not good)

⑧ According to the required drop transition process to select the appropriate diameter of the wire.

Hazards of electric arc    

 ①Arc light is usually used in electric welding. The content of ultraviolet light in arc light is high, which will affect the cornea. Therefore, you should wear protective goggles when doing electric welding

  ②To the skin is damaged have rough, desquamate, etc., secondly have certain effect on the germ cells

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                During CO2 welding, the following three types of pores may be produced

(1) CO porosity. The reason is that the welding wire deoxygenation is insufficient, so that a large number of FeO can not be reduced and melted in the metal pool, solidification and C react to generate Fe and CO,CO gas too late to escape, forming pores. Ensure that the welding wire has enough deoxidized elements, strictly control the carbon content of the welding wire, can reduce CO pores.

    (2) Nitrogen pores are caused by poor protection of CO2 airflow or low purity of CO2 gas (containing a certain amount of air). When a large amount of nitrogen is melted in the metal pool and the weld metal crystallizes and solidifies, the melting degree of nitrogen in the metal suddenly decreases and there is no time for it to escape, thus forming pores. The factors affecting the poor CO2 protection are too small CO2 gas flow, too fast welding speed, wind in the welding site, etc. Effective measures can be taken to prevent the formation of nitrogen pores.

    (3) The formation process of hydrogen stomata is the same as that of nitrogen stomata. The source of hydrogen is related to the rust, moisture, oil and other sundries on the surface of weldment, wire, CO2 gas and water content. Strictly clean up the debris on the surface of welding parts and wires, and use CO2 gas after purification, which can effectively prevent the generation of hydrogen pores.

The causes of air holes are generally: welding process, welding torch is too high; Welding torch nozzle splash plug; The distributor valve is damaged or not installed; Insufficient gas flow and pressure; Gas mismatch; Material water, rust, oil and other sundries; The welding environment is windy; Welding gun aging damage leakage; Personnel skills are insufficient, the above is caused by pores.

Measures to prevent pores:

 1.Select appropriate welding parameters according to material characteristics, plate thickness and groove type to maintain the stability of welding process and reduce the generation of pores.

 2.Select wire, flux and protective gas suitable for the base metal, clean up oil, rust and oxide and other sundries within 20 ~ 30mm on the groove and both sides before welding, to ensure smooth air path and wire feed structure.

 3.According to the actual situation, preheat the workpiece before welding, select the appropriate welding speed, at the end of welding and welding stop, should be slowly withdrawn from the welding pool, so that the pool slowly cooling, so that gas fully escape from the pool, reduce the generation of pores.

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        welding is a work of great harm to eyes and face. In the process of welding, a lot of arc radiation, rays, high-frequency electromagnetic field and thermal radiation will be produced. If the construction is carried out without wearing the welding mask, it will cause great harm to itself.

   During the welding process, heat source above 1000 degrees, can produce a strong light, ultraviolet and infrared ray, and the people in the eye lens to ray is most sensitive to exposure to X-ray radiation, after a few hours makes bloodshot eyes, long time contact with strong ultraviolet ray, can produce electric ophthalmia and have sore eyes, tears, afraid of light, foreign body sensation, severe cases can cause cataracts.

   The mirror set of the welding mask can filter out ultraviolet rays, infrared rays and other rays, so that the welder's eyes are fully protected. At the same time, because of the heat resistance of the material used in the welding mask, the user can be protected from the harm of thermal radiation. In addition, an external protection piece is added in front of the mirror set, which makes the mirror set free from the damage of splashes during welding, and the external protection piece is easy to change, thus improving the service life of the mask.

What is the advantage of automatic welding mask over ordinary welding mask?

1. Free your hands

The mask is not a hand-held mask. It directly frees your left or right hand, allowing you to operate with both hands. In this way, the difficulty of welding is greatly reduced, and the quality of welding is greatly helped, so that the quality of products can also be greatly improved.

2. Protect your eyes

The black glass used in the ordinary mask can only protect the strong light during welding, but cannot protect the infrared and ultraviolet rays which are more harmful to eyes. It is easy to induce electro-optic ophthalmitis if used for a long time. In addition, due to the characteristics of black glass, arc can only rely on experience and feeling, can not see the solder joint. The automatic photochanging welding mask makes use of the characteristics of liquid crystal molecule rotation. When there is no arc light, the light transmittance of the welding mask is high, and it is easy to see the machining parts. When there is arc light, the light transmittance of the welding mask decreases and the vision is protected.

2 Sensor Auto-darkening variable shade 9-13 filter lens.
94mm x 36mm viewing area.
Medium Impact Rating.
Fast Reaction Time.
Adjustable Sensitivity and Delay.
Complies to AS/NZS1337:2010 and AS/NZS1338.1:2012.
1 Year Limited Warranty.
Featuring the industry’s top 1/1/1/1 clarity rating.

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What are the causes and solutions of the serious wear of the mig contact tips？

At present, the mig contact tips is frequently replaced. The appearance is: the outlet of the mig contact tips is worn, leading to wire feed deflection, and the actual welding trajectory is offset, that is, the position of the TCP point is offset, resulting in welding defects such as welding deviation or welding leakage.

1. mig contact tips failure reason

The wear of the mig contact tips itself comes from the wear at the outlet of the mig contact tips due to the friction of continuous wire feeding at the increasing temperature of the mig contact tips, which often leads to calibration errors and affects the production efficiency during robot welding.

Should try to reduce the temperature of the mig contact tips, including in the mig contact tips composition, mig contact tips structure processing, mig contact tips material:

Brass, copper, chromium zirconium copper and other materials, brass is the most inferior, copper is slightly better, chromium zirconium copper is the best; Ceramic components are even added to the mig contact tips to increase wear resistance.

mig contact tips processing accuracy, due to the accuracy of processing equipment or other problems, the inner hole of the mig contact tips finish and concentricity is not good enough.

2.Wire straightening and surface finish

The wire is often tube or plate, with burrs or ribs, so it may affect the contact between the wire and the mig contact tips, and in welding, the mig contact tips should be stable under the premise of the minimum friction.

The mig contact tips life of dirty welding wire may be only one third of that of clean welding wire.

To determine the quality of welding wire, annealing stress elimination degree of welding wire, performance is how straightening, the test is:

50mm in the front of the welding gun nozzle, whether the wire can automatically bend, bending forward indicates that the wire is too soft, bending back indicates that it is too hard, hard wire on the conductive mouth the most cost;

Secondly, whether the wire feeding hose is bent from the wire feeder to the welding gun will also cause the bend of the welding wire.

3.Arc instability leads to arc backburn

The causes include poor arc, arc instability, wire feeding, workpiece surface cleaning degree, but does not necessarily affect the performance of the mig contact tips itself, at this time the welding fault is roughly related to the characteristics of welding power supply, wire quality, wire feeding effect, wire feeding hose and mig contact tips structure design.

When the conductive point in the welding wire and the mig contact tips is often changed, its life is only half of the stable conductive point;

4.Wire feeding speed or amount of fusion

The smaller the diameter of the mig contact tips, the shorter the service life. For the same 300A current, the amount of filling (melting) per unit time of 1.2 and 1.6 welding wires is basically the same.

The welding wire length of 1.2 is twice that of 1.6, that is to say, the wear amount of the mig contact tips of 1.2 is almost twice that of the mig contact tips of 1.6 with the same current and the same time.

Assume that the conductive tips of 1.6 and 1.2 are both worn by 0.2mm, which is 12.5% of 1.6 and 16.7% of 1.2. The beating range of the welding wire of 1.2 is larger.

        Improvement measures

1. the procurement of chromium zirconium copper (CUCRZR),Tellurium copper

2. Alignment of welding wire

3. Conductive mouth must be tightened with pliers, only hand twist is not good, arc instability。

4. The gun cleaning station is normal and sprayed with anti-splashing silicone oil.

5. Generally, small voltage is used.Approximate formula 14+0.04* current, high voltage, high loss.

6. Always clean the wire feed line.

7. The quality of the wire is also decisive

8. The workpiece surface as clean as possible and less oil.

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What are the advantages of plasma cutting welding torch?

①The plasma arc is approximately cylindrical, and the divergence Angle is not more than 5°. The size of the heating area is basically independent of the distance between the nozzle and the workpiece. Therefore, the impact of the distance between the nozzle and the workpiece on the weld quality is not as sensitive as that of TIG welding, which is very beneficial for manual operation.

②The plasma arc has high temperature, high ionization degree, and is still stable when the current is as low as 0.1A. It can be used for welding micro precision parts.

③plasma cutting welding torch not only has great penetration capacity, but also has strong hole effect because of its high energy density and high plasma ion current force, which is suitable for single-side welding and double-side forming without padding. The current required for welding the same thickness is small, the heat affected zone of welding is small, and the welding deformation is small. The shape of the plasma cutting welding torch seam is very ideal, like a wine cup, and the influence zone is small.

④Plasma arc with high energy density and fast flow rate has good stability and straightness, so it is suitable for high-speed welding, and the joint alignment requirements are significantly reduced. plasma cutting welding torch seam is narrow and deep, welding speed is fast, so the energy utilization rate is high, welding productivity is significantly improved.

⑤The tungsten pole shrinks inside the water-cooled copper nozzle, and it is impossible to contact with the workpiece, so the tungsten clamping phenomenon of the weld metal can be avoided.

What are the disadvantages of plasma cutting welding torch?

①Welding thickness is limited, generally below 25mm。

②The welding torch and control circuit are complicated, and the service life of the nozzle is very low.

③There are many welding parameters, which require high technical level of welding operators.

What materials can be welded by plasma cutting welding torch?

plasma cutting welding torch can weld almost all metals, such as stainless steel, aluminum and aluminum alloy, titanium and titanium alloy, nickel and nickel alloy, copper and copper alloy, magnesium and magnesium alloy and Monel alloy, etc. But low melting point or high vapor pressure metals, such as zinc, are generally not plasma cutting welding torch. Non - transfer arc can also be used for welding refractory materials, ceramics, etc.

Huarui welding expert

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Providing a Cleaner Work Environment

Fume coming out during the welding, Welding fume potentially consists of three ingredients:·

1. Welding consumables (90-95% of fume)
2. Base metals
3. Coatings present on the base material

Hazards of gas welding

1. Combustion and explosion accidents caused by welding sparks during welding.

2. Burns and scalds caused by welding flame or candle parts due to improper operation.

3. Improper use of equipment, electric shock accident, and falling accident in the welding process.

4. Hazards to the body and welders in the operation will cause blood, eyes, skin, lungs, and other lesions.

5. Welding welders are often exposed to radiation hazards such as strong light, infrared, ultraviolet, and so on. The X-rays produced by electron beams during welding can affect the health of welders.

6. During the welding process, due to the high temperature, the welding parts of the metal, welding rod, dirt, paint, and other evaporation or combustion, the formation of smoke vapor dust, causing poisoning.

7. The high-frequency electromagnetic field produced in welding can make people dizzy and tired.

In the welding operation, not only wear glasses to protect the eyes, so as not to damage the eyes but also wear a welding mask, etc., welders must do a good job of protective measures, the harm of gas welding really can not be underestimated!

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HuaRui Portable Fume Extractor Machine Low Vaccuqm Design

1 Fixation                           5 Lock nuts                 9 Start-stop clamp connector     13 Manometer

2 Compressed air connection for         6 Extraction hose connection   10 24VDC contactors 14 The Board

 Dedusting with the pressure relief valve  7 Dust collecting drawer       11 Start-stop pliers connection    15 Rubber gasket

3 Filter cartridge                     8 The main cable secures the Gulen head  12 Overload protector   16 Turbine

4 Fastener

Complet Solutions for Indoor Small Industry Welding

HuaRui Fume Extraction GMAW Welding Torch Air-cooled & Water-cooled

1. There is a control valve to adjust the suction size

2. Provide a variety of air-cooled models to meet different needs

3. conduit material, the cable is guaranteed not to be damaged

4. High-quality consumables are a strong guarantee of long service life

5. Ergonomically designed handle for a firm grip

6. Carbon dioxide torch: Air cooled, 360 amps 100% carbon dioxide.

For the interior of the frame, it is recommended to use 75% argon and 25% carbon dioxide welding seams for a better appearance.

7. 85% argon and 15% carbon dioxide are recommended for thick steel plates or parts (with oxide layer);

8. For those with high-speed pulses, it is recommended to use 90% argon and 10% carbon dioxide.

Tungsten Inert Gas, or TIG welding. Tungsten inert gas welding (tungsten inert gas welding) (non-molten gas shielded welding) Inert gas arc welding with pure tungsten or activated tungsten (thorium tungsten, cerium tungsten, zirconium tungsten, lanthanum tungsten) as an unmelted electrode has high quality but low speed.

TIG weldingrefers to non-melting electrode gas shielded welding, is an arc welding method using external gas as a protective medium, its advantages are good visibility of arc and weld pool, easy to operate; No or little slag, no post-weld slag cleaning. However, special wind protection measures should be taken when working outdoors.

 Welding skills (1)

TIG welding  itself belongs to the open arc operation can be very good to observe the shape and flow of the molten pool, much better than electrode arc welding.

 Welding Skills (2)

The control of welding hand stability is the biggest key to avoid shaking and burning the dock caused by the tungsten pool. The control method can be used to hold the forefinger of the welding torch to support the welded pipe or plate. The extension length of the tungsten electrode can be selected according to the depth of the crack, generally 3-5mm.

The wire transport method can be selected according to the size of the break. When the Angle of the break is small, the welding wire can be placed in the middle of the bath and sent continuously. When the break is large, both sides can be used to feed wire (to be quite skilled, to avoid touching the dock pole). The welding torch moves around to make the edge fuse well. On the surface of the full fish scale, according to the test competition scoring standards, tig weld height is generally 0~2MM, the surface is smooth without edge. Stomata. Crack. Can not fuse already. The above is the introduction of TIG weldingwork.

Aluminum alloy has good corrosion resistance, higher specific strength, electrical conductivity, thermal conductivity and plasticity. The performance changes with the change of its purity. The higher the purity, the lower the strength, and the higher the plasticity. Another characteristic is that with the increase of temperature, the tensile strength decreases, otherwise the tensile strength increases.

Aluminum alloy MIG welding, aluminum alloy MIG welding, aluminum alloy MIG welding process.

Operation method：

Both TIG and MIG welding methods belong to inert gas arc welding, while high purity argon is the commonly used shielding gas in the welding methods of two aluminum alloy materials. Compared with other gases, it has the characteristics of easy arc initiation, stable arc voltage, good protection effect, and small thermal conductivity. It is important to have a good cathodic crushing effect. It is very important to fuse the oxide film with a high melting point on the surface of aluminum alloy.

The electrode of TIG welding is non-melting, and there is no transition problem of deposited metal. The electrode of MIG welding is melted, so there is a transition problem of deposited metal.

If the thickness of the welding plate is above, if necessary, the welding seam shall be warmed before welding with a heating drying gun, and the temperature shall not exceed 150 ℃. Due to the large temperature difference at the beginning of welding, plus the strong thermal conductivity of the base material, the weld cooling rate is too fast, leading to the impurity that does not melt in the weld metal is difficult to overflow the surface, forming welding defects.

1. Argon arc welding must be operated by a special person switch.

2. Check whether equipment and tools are in good condition before work.

3. Check the TIG welding power supply, whether the control system has a grounding wire, and add lubricating oil to the transmission part. Rotation should be normal, argon gas, water must be unblocked. If there is a leakage phenomenon, should immediately inform repair.

4. Check whether the TIG welding torch is normal and the ground wire is reliable.

5. Check whether the high-frequency arc starting system and TIG welding system are normal, whether the wire and cable joints are reliable, for automatic wire electrode argon arc welding, but also check whether the adjustment mechanism and wire feeding mechanism are intact.

   
   

   
   

   

6. Choose polarity according to the material of the workpiece, connect the TIG welding loop, the general material is directly connected with DC, and the reverse connection method or AC power supply is used for aluminum and aluminum alloy.

7. Check whether the TIG welding groove is qualified, the groove surface shall not have oil, rust, etc., in the TIG welding seam on both sides of 200mm to remove oil and rust.

8. The use of the tool to check its reliability, TIG welding parts need to preheat also check the preheating equipment, temperature measuring instrument.

9. Argon arc TIG welding control button shall not be far away from the arc, so that in case of failure can be closed at any time.

10. The use of high-frequency arc must often check whether there is leakage.

11. Equipment failure shall be overhauled without power, and the operator shall not repair by himself.

12. In the vicinity of the arc, is not allowed to naked and naked exposed to other parts of the area, is not allowed to smoke and eat near the arc, in order to avoid ozone, smoke inhalation body.

13. When grinding thorium tungsten electrodes, you must wear masks and gloves, and obey the operation rules of the grinder. The best choice of cerium tungsten pole (a little less radiation). The grinder must be equipped with a ventilating device.

14. Operators should wear electrostatic dust masks at any time. Minimize the time of high-frequency electrical action during operation. Continuous work shall not exceed 6 hours.

15. Argon arc welding worksite must be air circulation. Ventilation and detoxification equipment should be started in the work. When the ventilation device fails, it should stop working.

16. Argon bottles are not allowed to be smashed. Argon bottles must have support and be more than 3 meters away from open fire when placed upright.

17. When argon arc welding is carried out inside the container, the special mask should be worn to reduce the inhalation of harmful smoke. There should be a person outside the container to monitor and cooperate.

18.  Thorium and tungsten rods should be stored in lead boxes to avoid injury caused by radiation dose exceeding the safety limit when a large number of thorium and tungsten rods are gathered together.

TIG welding (tungsten argon arc welding) is a welding method with pure Ar as the shielding gas and tungsten as the electrode. TIG wire to a certain length (usually LM) straight strip supply. An inert gas arc welding with pure tungsten or activated tungsten (thorium tungsten, cerium tungsten, zirconium tungsten, lanthanum，tungsten) as an unmelted electrode, in which the metal is melted by an arc between the tungsten electrode and the workpiece to form a weld. 

In the welding process tungsten is extremely unfused and acts only as an electrode. At the same time, argon or helium gas is sent into the nozzle of the welding torch for protection. Additional metals can be added as needed. In the international known as TIG welding. The main advantage of TIG welding is that it can weld a wide range of materials. Including the thickness of 0.6mm or above of the workpiece, the material includes alloy steel, aluminum, magnesium, copper and its alloy, gray cast iron, ordinary dry, various bronze, nickel, silver, titanium, and lead. The main application area is to weld thin and medium thickness workpieces, used as solder beads on thicker sections. 

MIG welding (MG gas shielded arc welding) is MG inert gas shielded welding, with Ar and other inert gas as the main shielding gas, including pure Ar or Ar gas mixed with a small amount of active gas (such as O2 below 2% or below 5% CO2 gas) welding method of MG arc welding. MIG wire is supplied in coil or disk form. This welding method uses the burning arc between the continuous welding wire and the workpiece as the heat source, and the welding arc is protected by the gas ejected from the welding torch nozzle.

The shielding gases commonly used in MGA arc welding are argon, helium, carbon dioxide or a mixture of these gases. When argon or helium gas is the shielding gas, it is called molten inert gas shielded arc welding (known as MIG welding in the world). When the mixture of inert gas and oxidizing gas (oxygen, carbon dioxide) is used as the shielding gas, or when the mixture of carbon dioxide gas or carbon dioxide + oxygen is used as the shielding gas, it is collectively referred to as the molten extremely active gas shielded arc welding (known as MAG welding in the world). The main advantages of MGA arc welding are that it can be easily welded in various positions, and it also has the advantages of faster welding speed and higher deposition rate. It is suitable for welding most major metals, including carbon steel and alloy steel. FGAS arc welding is suitable for stainless steel, aluminum, magnesium, copper, titanium, pickax, and nickel alloys. Arc spot welding can also be carried out by this welding method.

Mikoyan welding torch welding method is to use the welding wire and the workpiece between the burning arc as a heat source, by the welding torch nozzle to protect the gas arc.

The protective gases commonly used in gas metal arc welding are argon, helium, carbon dioxide, or a mixture of these gases. When argon or helium is used as protective gas, it is called MIG welding, and when the mixture of inert gas and oxidizing gas (oxygen, carbon dioxide) is used as protective gas, it is called MIG Gas metal arc welding, or with carbon dioxide gas or carbon dioxide + oxygen mixture for the protection gas, collectively known as the Gas metal arc welding -LRB-internationally known man MAG welding).

The main advantage of gas metal arc welding is that it is easy to weld in various positions and has the advantages of faster welding speed and higher deposition rate. The Gas metal arc welding is suitable for welding most major metals, including carbon steel and alloy steel. Gas metal arc welding is suitable for stainless steel, aluminum, magnesium, copper, titanium, pickaxe, and nickel alloys. This welding method can also be used for arc spot welding.

The above is our Mikoyan torch welding method, I hope to help you.    

The concept and characteristics of the plasma torchWhen the high-frequency electric field is applied to the induction coil, the charged particles produced by partial ionization in the working gas of the plasma for some reason move at high speed under the action of the high frequency alternating electromagnetic field and collide with the gas atom, it ionizes rapidly and massively, forming an avalanche discharge, and the ionized gas forms a closed circular eddy current on the cross-section perpendicular to the magnetic field, a secondary coil equivalent to a transformer is formed in the induction coil and is coupled to the induction coil equivalent to the primary coil. The high temperature generated by this high-frequency induction current heats and ionizes the gas, and forming a torch-like stable plasma torch at the nozzle.

The features are as follows:

(1) the working temperature is high and the working gas is inert, so the atomizing condition is good, which is advantageous to the decomposition of refractory compounds and the excitation of elements, and has a high sensitivity to most elements.

(2) because of the skin effect, the stability is high, the self-absorption phenomenon is small, the linear range of determination is wide.

(3) the ionization of the alkali metal causes less interference due to its high electron density.

(4) ICP is a non-polar discharge, and there is no electrode contamination.

(5) the flow rate of carrier gas in ICP is low, which is favorable for the sample to be fully excited in the central channel, and the sample consumption is also low.

(6) the inert gas is used as the working gas, so the spectral background interference is less.

The above is the concept and characteristics of the plasma torch, I hope to help you.    

Most people encountered, when the hose leak water, water either sprayed into all sites, or slowly leaked, depending on your hose, leakage size and position, and whether it is firm. This is just a faulty hose or connection, or both, need repair.

First, you need to figure out what kind of hose do you have, or what kind of hose you want to buy. If you don't know, you can check your MIG Welding Torch details and find some choices. This will get the most accurate information from the company that makes your MIG Welding Torch.

Second, you need to make further, buy the hose and the necessary supplies you choose to switch. You should already have this because you only need to remove enough MIG Welding Torch to replace the hose, the hose may stretch or perforated in a place, resulting in leakage.

Finally, you have to make a real fix. This is very simple, as long as you are satisfied with your Mig Welding Torch and resembled. The hose is mounted at the bottom of the catheter, and the connection may be loose. Simply replace the hose and assemble the flashlight.

The function of mig welding torch is to evenly mix combustible gas and oxygen in a certain proportion and spray it from the welding nozzle at a certain speed to form a flame with a certain energy rate, a certain composition, suitable for welding requirements and stable combustion. The quality of mig welding torch directly affects the welding quality of gas welding. Therefore, it is required that mig welding torch should have good performance in adjusting the ratio of oxygen to combustible gas and flame energy rate, so that the speed of mixed gas ejection is equal to or greater than the combustion speed, so that The flame burns steadily. At the same time, the weight of the welding torch is required to be light, and it should be easy to operate, safe and reliable when used.

The classification of mig welding torch is divided into two types: equal pressure type and jet suction type according to the mixing method of combustible gas and oxygen;

According to the size and weight, it is divided into two types: standard type and light type; according to the number of flames, it is divided into two types: single flame and multiple flame;

According to the type of combustible gas, it is divided into acetylene, hydrogen, liquefied petroleum gas, etc.; according to the method of use, it is divided into two types: manual and mechanical.

The pressure of the combustible gas of the equal pressure torch is equal to the pressure of oxygen, so it is called equal pressure.

When you work as a welder, the surrounding environment becomes very hot. Many welders complained about melting part of the tig welding torch and putting it on the hot surface without thinking about it. If you do make this mistake, you should know that you may not have to throw it in the trash immediately, which will give you peace of mind.

The first thing you need to do is to figure out the severity of the melting point. If it is a large spot, or on the main part, or near the tip, you should stop using it immediately until it can be detected. You may have melted a part of the internal wiring or key parts, and you don't want to continue using it like this.

If the melting point is small and at an inconspicuous point (such as on the handle), you can cover it with tape and complete the project or day's work. Obviously, this is not a long-term solution, but it will help you through the difficulties.

In the long run, the melting point of tig welding torch may just cause you inconvenience and remind you to stay away from the place where the equipment is placed. However, it is even worse if you melt the wrong position. Severe damage can only be solved by purchasing replacement parts.