What are the safety maintenance aspects of the actual operation of welding and welding in tool cabinet sheet metal processing

1. to avoid safety accidents

During welding work, there are two kinds of safety accidents: one is immediate safety accident, that is, touching the charged body; The second is an indirect safety accident, that is, an object called a charged body due to damage to the insulation layer or failure of machinery and equipment. The key methods of immediate safety accidents during electric welding are: hands or a certain position of the human body touch a part of the charged body such as electric welding tongs and welding wires when removing and replacing welding wires and welding parts, while feet or other positions of the human body are not very good for the ground or the intermediate insulation layer of metal structures. When electric welding is carried out in vessels and pipelines, in rainy, wet and cold areas or under the condition of jumping and sweating, safety accidents, it is very easy to cause safety accidents, when the hand or a certain position of the human body touches the terminal, terminal, power transmission line and other safety accidents of the exposed and charged body; In the area close to the high-voltage line, the electric welding is carried out due to excessive proximity, resulting in thermal breakdown charge and discharge.

The key to indirect safety accidents during welding is the power supply of the automatic welding machine. The key points are: the power supply of the machine and equipment is reduced due to overload application and internal short circuit failure, resulting in the reduction of dielectric strength; The electromagnetic coil is powered due to damage to the insulating layer caused by rain and damp return. Part of the insulating layer of wires and cables is damaged, causing power supply, etc. What are the safety maintenance aspects of the actual operation of welding and welding for tool cabinet sheet metal processing?

The key countermeasures to prevent electricity supply are as follows: Shenzhen sheet metal processing should be strictly carried out according to safety operation procedures; Safety protection articles should be properly worn during welding. The automatic welding machine casing is grounded, because when the casing is powered, because the resistance of the grounding wire is not large, most of the current does not pass through the human body, but passes through the wire joints to form a control loop, thus avoiding safety accidents; select suitable wires and cables and improve safety inspection.

2. avoid arc radiation

Avoid welding arc and spark burns, wear protective clothing appropriately, and select light-blocking mirrors suitable for the working environment. At the same time, arc safety protection room or screen shall be set up in the welding workplace. The screen shall be made of fireproof materials, the surface layer shall be coated with gray-black or dark gray paint, the aspect ratio shall not be less than 1.9m, and a gap of 25cm shall be left at the lower part for air circulation.

Welders need to wear cotton white canvas work clothes, do not need to wear artificial fiber work clothes. The respiratory mask should cover the face and ears, and no light transmission.

III. Flue Gas Purification

Welding flue gas purification is the key safety protection measures to avoid organic waste gas and harmful substances on the jump injury, should do a good job of comprehensive natural ventilation and partial natural ventilation.

Comprehensive natural ventilation ventilation is the natural ventilation of the whole production workshop through mechanical ventilation systems such as pipelines and fans. All-round natural ventilation shall be conducted by means of eject smoke or blow-suction natural ventilation.

Part of the natural ventilation is achieved by means of a partial exhaust system, and organic waste gas and harmful substances are effectively sucked away by the exhaust hood. Some natural ventilation facilities include smoke exhaust hood, portable small fan, compressed air ejector, smoke exhaust dust remover, etc.

When part of the exhaust system is selected, the wind force around the welding work unit shall be controlled at 30 m/mln to ensure that the electric arc will not be damaged. In addition, in order to meet the fire protection requirements, the distance between combustible and flammable and explosive materials and the open flame of the welding operation surface shall not be less than 10 m during electric welding.