1, push the knife switch, the human body should stand obliquely, push the foot once, and then start the welding machine.
2. When parking, turn off the welding machine first, and then switch the knife.
3, welding table must be installed screen, don't look straight at the arc with the naked eye.
4. It is forbidden to weld closed cylinders, rosin cylinders, banana boat cylinders, hydrogen cylinders and other flammable containers, otherwise it will cause an explosion accident.
5, mobile welding machine position, must first cut off the power supply. In case of sudden power failure during welding, the electric welding machine should be turned off immediately.
6, must wear protective equipment before work (gloves and protective glasses, etc. ).
7. Before using the welding machine, check whether the electrical circuit is in good condition, and whether the secondary coil and shell are grounded properly.
8. Before operation, you must check whether there are inflammable and explosive articles around. If there are, you must remove them to work.
9, check whether the electrode holder handle insulation is in good condition before starting the welding machine. When the electrode holder is not used, it should be placed on the insulator.
Electric welder is a special metal welding job in machinery manufacturing and machining industry, and it is also a very important post. At present, China's processing and manufacturing industry lacks many talents in this field. In enterprises, senior blue-collar workers are paid more than white-collar workers. However, this type of work is too harmful to human body, such as burning eyes, radiating ultraviolet rays and toxic gases. And "electric welder" is based on practice, serving engineering practice, collecting difficult welding knowledge, skills, management and other knowledge, and serving the society. Welders need six chapters, including welding basic knowledge, welding materials, welding preparation, basic skills of welding process operation, welding deformation correction and defect prevention measures, welding quality management and safety measures.
The welder's work often makes the work clothes completely wet. Chronic manganese poisoning is mainly seen in workers who inhale manganese dust for a long time. The clinical manifestations are mainly extrapyramidal nervous system symptoms, neurobehavioral dysfunction and mental disorders. People who are exposed to manganese include manganese mining and smelting, manganese covered electrode manufacturing, welding and cutting manganese alloys, and industrial workers who manufacture and use manganese dioxide, permanganate and other manganese compounds.
In welding, welders are often harmed by strong light, infrared rays and ultraviolet rays. X-rays produced by electron beam in welding will affect the health of welders.
Combustion and explosion accidents caused by welding sparks.
Burn and scald accidents caused by welding flame or candle.
Electric shock accidents and falling accidents during welding.
Welders will cause pathological changes in blood, eyes, skin and lungs during operation.
During welding, the metal, covered electrode coating, dirt, paint, etc. at the welding site. Evaporation or combustion due to high temperature, forming smoky dust, causing poisoning.
The high-frequency electromagnetic field generated by welding will make people dizzy and tired.
The harm of welding operation is not inevitable. As long as each 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.
Welders are often scalded by molten iron during practice.