What is electric welding and what does electric welding mean

Arc welding uses the heat of the arc to heat and melt the metal for welding. The welding arc is an intense, persistent gas discharge that generates a large amount of heat and intense light during this gas discharge. Usually the gas is not conductive, the real gas of the welding arc conducts electricity, converts the electrical energy into heat energy, and is used to heat and melt the metal, thus forming a welded joint, in order to make the gas conductive, the gas must be ionized.

The gas in the space where the welding arc is located is ionized, and the neutral gas molecules or atoms are dissociated into charged positive ions and negatively charged negative ions, and these two charged particles are precessioned towards the poles of the electric field respectively, so that the local gas conducts electricity and forms an arc.

Arc welding is welded using arc heat energy and melting metal. There are many welding methods: such as manual arc welding, submerged arc welding, gas shielded welding, etc., but the most used is manual arc welding.

Manual arc welding is achieved by manual operation. The manual arc welding process has the following characteristics: first, the process is flexible and adaptable; the second is welding; Third, it is easy to disperse stress and control deformation.

Because manual arc welding is convenient to operate and requires simple welding equipment, and can complete the welding of metal materials in different positions and different joint forms anytime and anywhere, manual arc welding is the most widely used in welding production. Manual arc welding equipment includes AC arc welders, rotary DC welders, and rectifier arc welders. Hope, thank you, thank you.

Welder is a special metal welding job in the machinery manufacturing and machining industry, and it is also a very important position. At present, China's processing and manufacturing industry lacks a lot of talents in this area, and the treatment of senior blue-collar workers is higher than that of white-collar workers. However, this type of work is too harmful to the human body, such as burning eyes, radiating ultraviolet rays, toxic gases, etc.

"Wolder" is based on practice, serving engineering practice, and bringing together difficult welding knowledge, skills, management and other aspects of knowledge to serve the society. The type of welding work requires many chapters, including basic welding knowledge, welding materials, welding preparation, basic skills of welding process operation, welding deformation correction and defect prevention measures, and welding quality management and safety measures.

Some of the drawbacks and dangers of welders:

1.The work of a welder tends to leave the overalls completely soaked. Chronic manganese poisoning is mainly seen in workers who have inhaled manganese soot for a long time, and the clinical manifestations are mainly extrapyramidal nervous system symptoms, neurobehavioral dysfunction and mental disorders.

Exposure to manganese is increased by industrial workers who are exposed to manganese ore mining and smelting, manganese electrode manufacturing, welding and wind-cut manganese alloys, and manufacturing and application of manganese dioxide, permanganate and other manganese compounds.

2.The radiation hazards that welders are often exposed to in welding include strong light, infrared, ultraviolet rays, etc. The X-rays produced by the electron beam in welding can affect the health of the welder.

3.Combustion accidents caused by welding sparks**.

4.Burns and scalds caused by welding flames or candles.

5.Electric shock accidents and falling accidents that occur during welding.

6.Welders will cause lesions in the blood, eyes, lungs, etc. during the operation.

7.During the welding process, the welding parts, welding rods, dirt, paint, etc. of the metal evaporate or burn due to high temperature, forming smoke-like vapor dust, causing poisoning.

8.The high-frequency electromagnetic fields generated in welding can make people dizzy and tired.

9.The hazards of welding operations are not inevitable. As long as every welder strictly abides by the safety regulations of welding and cutting operations, these hazards can be prevented for junior welders, who often get electro-optic ophthalmia.

10.During the welder's practice, he was also often scalded by molten iron.

Electric welding refers to the use of electrical energy, through heating or pressure, or both, and with or without filler materials, so that the weldment can achieve atomic bonding. The processing equipment used for electric welding is called an electric welding machine.

Here's how it works:

With the commonly used voltage of 220V or 380V, the voltage is reduced through the transformer in the welding machine, the current is enhanced, and the electrical energy is generated to produce a huge arc heat to melt the electrode and the steel, and the electrode melting makes the steel more integrated. Arc welding is the most widely used welding method, including hand arc welding, submerged arc welding, tungsten gas arc welding, plasma arc welding, MIG/MAG welding, etc. Due to the use of power supply in arc welding, the high-temperature arc generated by it is easy to cause fire**, and the danger is greater.

Electric welding is an economical, applicable and technologically advanced method in the processing of material joining. Welding can be achieved between almost any two metal materials, as well as between some metal materials and non-metal materials; It can be realized to make a large, economical and reasonable structure from small to large; Materials with different properties can be used in different parts of the structure to give full play to the characteristics of various materials; Welding parts have the characteristics of good air tightness and light weight; Welding with electricity can also be used to weld between ultra-thin and ultra-fine materials.

There are several types of electric welding:

1. Arc welding is the most widely used welding method at present. It includes: hand arc welding, submerged arc welding, tungsten gas arc welding, plasma arc welding, MIG/MAG welding, etc. The vast majority of arc welding uses the arc burning between the electrode and the workpiece as the heat source.

2. This is a type of welding method that uses resistance heat as an energy source, including electroslag welding with slag resistance heat as an energy source and resistance welding with solid resistance heat as an energy source.

3. High-energy beam welding This type of welding method includes: electron beam welding and laser welding.

4. The energy source of brazing can be chemical reaction heat or indirect heat energy.

5. Other welding methods, mainly including electroslag welding and high-frequency welding with resistance heat as the energy source; Gas welding, pneumatic welding, and first-class welding with the ability to learn the welding energy of the stool; Friction welding, cold pressure welding, ultrasonic welding, and diffusion welding with mechanical energy as the welding energy source.

Manual arc welding, also known as handle welding.