What are the technical essentials of electric welding? What are the essentials of electric welding t

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. Arc initiation:Before welding, the surface within 20mm on both sides of the workpiece joint should be cleaned (such as eliminating rust, oil and moisture), and the end metal of the electrode core should be exposed for short circuit arcing.

2. Carrier:The transport bar is the most important link in the welding process, which directly affects the external forming and internal quality of the weld. After arc ignition, there are several basic movements of the electrode on the normal operating surface:

It is gradually fed in the direction of the weld pool, gradually moves in the direction of welding, and swings laterally.

3. Weld finishing:When the electrode is moved to the end of the bead, the arc is repeatedly extinguished and triggered several times at the arc pit, and the circle movement is made by the movement of the wrist until the arc pit is filled and the arc is broken.

Notes:

1. The length of the arc:

The length of the arc is related to the type of electrode coating and the thickness of the coating. However, short arcs should be taken as much as possible, especially low-hydrogen electrodes. Long arcs can cause stomatosis. The short arc can avoid harmful gases from invading the weld metal and forming undesirable impurities such as oxides that affect the quality of the weld.

2. Welding speed:

Maintain the right welding speed, and the slag can cover the molten pool well. All kinds of impurities and gases in the molten pool have sufficient time to float out, so as to avoid the formation of slag inclusions and porosity of the weld.

The above content reference: Encyclopedia - electric welding

Summary. Welding Technology Essentials:

1. Adjust the temperature of the soldering iron before soldering, the soldering iron should be kept clean, and the temperature of the drug should be adjusted to about 280 degrees;

2. Hold the solder in your left hand and the soldering iron in your right hand. First, the soldering iron head is placed against the intersection of the pins and pads of the soldered component, and then the solder is sent to the intersection and the soldering iron head;

3. Welding time is 2 to 3 seconds;

4. The solder joint is firm and smooth, and the size is moderate, which is generally controlled at more than two-thirds of the size of the pad;

5. The welding iron is firm and bright, and the device will not be damaged during welding;

6. There shall be no false, false or missing welding;

7. The angle of contact between the solder and the metal pin of the soldered component is 45 to 60 degrees;

8. The surface of the solder joint should be smooth and bright, and there should be no pulling point, wrinkle, puffing, slag inclusion, pitting and other phenomena;

9. The transition from the solder to the metal pins of the soldered component should be smooth and smooth with wetness and concave and convex surfaces.

What are the essentials of electric welding technology?

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<> soldering technology essentials: 1. Adjust the temperature of the soldering iron before soldering, the soldering iron should be kept clean, and the temperature of the drug should be adjusted to about 280 degrees; 2. Hold the solder in your left hand and the soldering iron in your right hand. First, the soldering iron head is placed against the intersection of the pins and pads of the soldered component, and then the solder is sent to the intersection and the soldering iron head; 3. Welding time is 2 to 3 seconds; 4. The solder joint is firm and smooth, and the size is moderate, which is generally controlled at more than two-thirds of the size of the pad; 5. The welding iron is firm and bright, and the device will not be damaged during welding; 6. There shall be no false, false or missing welding; 7. The angle of contact between the solder and the metal pin of the soldered component is 45 to 60 degrees; 8. The surface of the solder joint should be smooth and bright, and there should be no pulling point, wrinkle, puffing, slag inclusion, pitting and other phenomena; 9. The transition from the solder to the metal pins of the soldered component should be smooth and smooth with wetness and concave and convex surfaces.