What should be paid attention to when engaging in electric welding, and what should be paid attentio

Precautions for welders:

Electric welding (gas welding, gas cutting) workers are special operation personnel, and must pass the physical examination before taking up their posts, as well as professional safety technology learning, training and examination, and then issue the "Special Operation Certificate" before they can operate independently.

Welders must be equipped with suitable filter masks, dry canvas overalls, gloves, rubber insulated shoes, safety helmets, etc., and safety equipment such as flat glasses should be worn for knocking welding slag and grinding wheels; Fasten your seat belt when carrying gas in the high-altitude and operation pits. Gloves should be worn when replacing the electrode.

Precautions when welding:

Before work, the environment of the welding site should be carefully checked, and flammable and explosive materials are not allowed to be stacked within 10 meters of the welding site.

Before work, carefully check whether the tools and equipment are in good condition, and whether the shell of the welding machine is reliably grounded.

The shell of the welding machine must have good zero or grounding protection, and the resistance value of grounding and zero should be less than 10 ohms; It is forbidden to contact the wire and ground wire with the wire rope, and the wire rope and mechanical and electrical equipment shall not be used to replace the neutral line.

The length of the primary power cord of the AC arc welding machine shall not be greater than meters, and the length of the secondary power cord and cable of the electric welding machine shall not be more than 30 meters, and shall be double-insulated. When welding in a wet place, insulating objects such as wooden boards should be padded at the construction site to prevent electric shock; When your clothes are wet due to sweating, do not lean against a live steel plate or workpiece to prevent electric shock.

It is strictly forbidden to climb the ladder with the handle or wrap it around the body. The welding machine should be placed in a rainproof and well-ventilated place, and in the event of a thunderstorm, the open-air welding operation should be stopped. When replacing the mobile handle of the site, the power supply should be cut off.

When the power cord of the welding machine or the welding machine fails, it should be repaired together with the electrician to prevent electric shock accidents. The repair of the welding machine shall be carried out by the electrical maintenance personnel, and other personnel shall not disassemble and repair without the consent of the maintenance personnel.

When there is a fire during the welding process, the power supply of the welding machine should be cut off first, and then the fire extinguisher such as carbon dioxide and dry powder should be used to extinguish the fire; Foam fire extinguishers are prohibited. After the welding is completed, check and tidy up the site, extinguish the fire, cut off the power supply, and then leave the work site. When pushing and pulling the knife switch, the face is not allowed to be directly facing the switch, so as to prevent the spark caused by the short circuit from burning the face.

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.

Precautions for welding operations:

1.The shell of the welding machine must be well grounded, and the disassembly and assembly of its power supply should be carried out by an electrician.

2.The welding machine should be set up with a separate switch, the switch should be placed in the rainproof gate box, and the gloves should be worn when pulling and closing to operate sideways.

3.The welding tongs and the wire must be well insulated, firmly connected, gloves should be worn to replace the welding rod, work in a wet place, and should stand on the insulating board or wooden board.

4.It is strictly forbidden to weld on vessels or pipelines with pressure, and the power supply must be cut off before welding live equipment.

5.Containers or pipes that have been welded and stored in flammable, explosive, or containing articles must be clean, and all pores and openings must be opened.

6.The wire and ground wire are forbidden to contact with the wire rope, and the wire rope or electromechanical equipment is not allowed to replace the zero line, and all ground wire joints must be connected firmly.

7.When using arc gouging to clean the roots of welding slag, protective glasses or masks should be worn to prevent iron slag from splashing and injuring people.

8.Flammable and explosive materials should be around the welding site, or covered and isolated.

9.When welding must be carried out in the diffusion area of flammable and explosive gas or liquid, it should be tested and approved by the relevant departments before welding.

Welder pneumoconiosis. Welding fumes can enter the human body through the respiratory tract and mainly damage the respiratory system. In the early stage, there are no clinical signs and symptoms, and the onset of the disease is generally more than 10 years.

Acute carbon monoxide poisoning. Carbon monoxide can enter the body through the respiratory tract. Mainly damages the nervous system.

Manifested as severe headache, dizziness, palpitations, nausea, vomiting, weakness, rapid pulse, irritability, unsteady gait, unconsciousness, coma, convulsions, incontinence, shock. In severe cases, death is immediate.

Chronic manganese poisoning. It can enter the human body through the respiratory tract. Chronic manganese poisoning generally has a slow onset, mainly manifested as neuroid and autonomic dysfunction in the early stage, and as the disease continues to develop, symptoms and signs of extrapyramidal neurological disorders may appear.

Acute nitrogen oxide poisoning. It can enter the human body through the respiratory tract. Mainly damages the respiratory system. Presents with sore throat, chest tightness, cough, and sputum production. There may be mild dizziness, headache, weakness, etc

We need to pay attention to safety, safety is the foundation of life, and safety is in the heart.

1. For emergency repair and welding operations in highly toxic places, isolated oxygen respirators can be worn to prevent the occurrence of acute occupational poisoning accidents.

2. In order to protect the welder's eyes from arc light, a mask with special protective lenses must be used during welding, and different types of filter lenses are selected according to the intensity of the welding current. At the same time, it is also necessary to consider the eyesight of the welder and the brightness of the welding working environment.

3. In order to prevent welders from being injured by arcs, welders should wear light-colored or white canvas overalls. At the same time, the cuffs of the overalls should be tightly tied, the neckline should be buttoned, and the cuffs should not be exposed.

4. For welding assistants and other workers near the welding site who are injured by arc light, they should pay attention to cooperate with each other when working, and the auxiliary workers should wear filters with moderate color shades. In the multi-person operation or cross operation site engaged in electric welding operations, protective measures should be taken, and protective shields should be set up to prevent the eyes of welders and other workers from being punctured by electric lone light.

1: First of all, learn what you need to work; Before learning electric welding technology, I must have an idea, what company I want to enter, I need to learn electric welding or carbon dioxide gas shielded welding or argon arc welding, which positions to learn specifically, flat welding, flat fillet welding and horizontal welding, vertical welding, vertical welding, vertical welding, and reverse welding. If you learn it, you can apply it in your work, and you should be targeted.

2: Practical training: welders should learn well, mainly six words "diligent study, think more and practice hard", with hard training as the most important, through hard training to master the skills taught by the coach, standardize the basic movements.

3: Practice should be concentrated continuously: three days of fishing and two days of drying nets is not good to learn welders, only let go of the mentality of eagerness, step by step, in order to really learn the skills, really use a lifetime.

4: To learn from a high-level teacher: what is a high level, you can go to a school with better equipment, teachers and other conditions, this kind of school is relatively strong.

5: Before welding, we should carefully study the theoretical knowledge of welding, think while welding, and constantly summarize experience, so that the technology will progress.

1. Protection habits, to develop the habit of wearing a welder's hood or holding a welder's mask, and avoid eyesight.

2. Gestures and posture habits, the molding will be ugly when you first start welding, but you must ensure that the angle of the welding rod and the material, or the posture of the standing welding and squatting welding people, this has to be developed from the beginning of contact with the welding staring to make the quick connection.

3. Pay attention to safety, safety first, wear and use all kinds of labor protection equipment, and any part of the body can not be exposed to the sliding light of the welding arc for a long time or many times. Prevent electric shock and prohibit construction in places with flammable materials in the vicinity.