Protective measures for operating TIG welding, safe operating procedures for TIG welding

The main thing is that the smoke is poisonous, and you can bring a thicker mask. It's nothing to prevent eye stings, just don't open it when you click! I have been burning electric welding and TIG welding for more than 5 years! Nothing! It doesn't hurt to get used to it.

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.

It's good to pay attention to yourself, haha

1. The argon arc welding must be operated by a special person.

2. Check whether the equipment and tools are in good condition 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 intact 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.

Be calm in your heart and steady in your hands.

Relationship between welding current and electrode diameter: The choice of electrode diameter depends on the thickness of the weldment and the position of the weld, the relationship between the welding current and the position of the weld: When welding a flat weld, since it is easier to transport the rod and control the molten metal in the molten pool, a larger welding current can be selected for welding.

When welding in other positions, in order to avoid the molten metal flowing out of the molten pool, the molten pool should be as small as possible, so the welding current should be correspondingly smaller than that of flat welding, and generally when using alkaline electrodes, the welding current should be smaller than that of acidic stoves.

Precautions for TIG welding

When the welder is far away from the welding site and must use the welded cable of Nagamori Sheng, the cross-section of the two welded cables must be thickened accordingly to keep the voltage drop of the welded cable at about 4 volts, otherwise it will affect the stable combustion of the arc.

When the welding machine stops working and is temporarily stopped for a short period of time, the remaining cooling water in the control box and the water pipe of the welding torch should be blown clean, dried with compressed air, and the laughing base should avoid long-term damage to the welding machine caused by water accumulation.

Before using the machine, the welder must have a thorough understanding of the performance of the welding machine. Those who don't know it are not allowed to operate. The arc temperature of argon arc welding is generally between plasma arc and manual arc welding, the arc temperature rises by 9000-10000 thousand, plasma arc is 16000-32000 thousand, manual arc welding is 5000-6000 thousand, melted argon arc is 10000-14000 thousand, and oxyacetylene flame is 3100-3200 thousand.

The above content refers to Encyclopedia - TIG welding.

Argon arc welding is a welding method using argon or argon-rich gas as a shielding gas melting pole, which is widely used in the shipbuilding industry and has very high efficiency, especially for the welding of ship hulls. Prepare oxygen tanks, TIG welding machines and TIG welding guns. Check whether the current is suitable for the argon arc welding machine, whether there is any disturbance and leakage, and check whether the oxygen cylinder is leaking.

Before welding, the grease, coating, lubricant and oxide film on the surface of the weldment must be removed. It is necessary to wear a head mask, gloves, work clothes, and work shoes to avoid ultraviolet rays and infrared burns from the arc light.

The technique of argon arc welding spot welding is to hold down the switch for a short time, press the thickness of the material a little longer, and send the welding wire inside, when it is burned, it is easy to burn through without sending the welding wire; In addition, you can weld very thin plates without adding welding wire, hold the tungsten needle with your hand and gently tap it at the level of the nozzle of the gun to weld.

The reasonable position between the welding torch and the welding wire and the workpiece is determined by the shape and size of the workpiece to be welded and the working conditions of the workplace. For example, if the angle between the welding torch and the workpiece is too small, that is, the inclination of the welding torch is too large, it will reduce the protective effect of argon on the molten pool. If it is too large, it will cause trapping to the wire feeding, and it is easy to burn through the workpiece vertically.

How do you spot weld TIG welding?

1. Before welding, the argon cylinder should be prepared, and the argon flowmeter should be installed on the bottle, and then the air inlet hole on the back panel of the welding machine should be connected with the air pipe, and the connection should be tight to prevent air leakage.

2. Connect the argon arc welding gun, gas joint, cable quick connector and control joint with the corresponding socket of the welding machine. The workpiece is connected with the " " bolt by means of a welded ground wire.

3. Connect the power cord of the welding machine and check whether the grounding is reliable.

4. After connecting the power supply, choose AC argon arc welding or DC argon arc welding according to welding needs, and move the line transfer switch and control transfer switch to AC (AC) file or DC (DC) file. Note: The two switches must be used synchronously.

5. Put the welding mode switch in the "argon arc" position.

6. Open the argon cylinder and flowmeter, pull the gas test switch to the "gas test" position, at this time the gas flows out of the welding gun, adjust the air flow, and then pull the gas test and welding switch to the "welding" position.

7. The size of the welding current can be adjusted by the current adjustment handwheel, the clockwise rotation current decreases, and the counterclockwise rotation current increases. The current regulation range can be defined by the current size transfer switch.

8. Select the appropriate tungsten rod and the corresponding clamp head, then grind the tungsten rod into a suitable taper, and install it in the welding gun, and press the switch on the welding gun after the above work is completed.