Several items of second-class argon electric test in Liyang

Besides welding, you should also know the safety regulations of TIG welding.

1) The welding site must be equipped with fire prevention equipment, such as sand box, fire extinguisher, fire hydrant, bucket, etc. Flammable articles shall not be less than 5m away from the welding site. If the specified distance cannot be reached, it can be properly covered with asbestos board and asbestos cloth to prevent Mars from falling into flammable materials. The distance between the explosive and the welding site shall not be less than 10m. The argon arc welding operation site should have good natural ventilation and fixed mechanical ventilation device to reduce the harm of harmful gas and metal dust in argon arc welding.

2) The manual TIG welding machine should be placed in a dry and ventilated place and operated in strict accordance with the instructions. Before use, the welder should be thoroughly inspected. Make sure there are no hidden dangers before turning on the power. Welding can only be carried out after no-load operation is normal. In order to ensure the welding machine wiring is correct, there must be a good and firm grounding to ensure safety. On/off of the welding machine power supply is controlled by the switch on the power supply board. It is forbidden to pull the switch by load, so as not to burn the shape contact.

3) Regularly check the working condition of cooling water system of argon arc welding gun, and immediately solve the blockage or leakage if it is found, so as to avoid burning the welding gun and affecting the welding quality.

4) When the welder leaves the workplace or is not in use, the power supply must be cut off. If the welding machine fails, it should be repaired by professionals, and safety measures such as electric shock prevention should be taken during maintenance. Welding machine should be cleaned at least once a year.

The high-frequency electromagnetic field generated by the high-frequency oscillator of TIG welding machine will make people feel dizzy and tired. Therefore, the time of high-frequency electromagnetic field should be reduced as much as possible when welding, and the high-frequency power supply should be cut off immediately after igniting the arc. The welding gun and welding cable shall be shielded by soft metal braided wire (one end of the hose is connected to the welding gun, the other end is grounded, and the outside is not insulated). If possible, crystal pulse arc ignition should be used instead of high frequency arc ignition.

6) When argon arc welding, the ultraviolet ray intensity is very strong, which is easy to cause electro-optic ophthalmia and arc burn, and at the same time, ozone and nitrogen oxides are produced to stimulate the respiratory tract. Therefore, welders should wear white canvas overalls, masks, protective gloves and foot covers when operating. In order to prevent electric shock, the ground near the workbench should be covered with insulating rubber, and the staff should wear insulating rubber shoes.