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Basic knowledge and safe methods for welders are as follows: 1. One should possess general electrical knowledge, abide by the standard safety rules for welders, and also be familiar with fire extinguishing techniques, first aid in case of electric shock, and artificial respiration methods. 2. Before starting work, check whether the welder’s power cable, connection wires, and all connection points are in good condition; if the cables cross roadways, they should be elevated or covered with protective covers ； The secondary circuit and enclosure of the welding machine must be properly grounded ； The insulation of the electrode holder must be good. 3. Welding outdoors is not allowed when it is raining. When working in wet areas, one should stand on surfaces covered with insulating materials and wear insulating shoes. 4. Tasks such as connecting or checking the wiring of mobile welding machines to the power grid, as well as grounding, should be carried out by electricians. 5. When pushing the knife switch, tilt your body slightly, push it all the way at once, and then turn on the welder ； The welding machine must be turned off first before the power switch can be pulled. 6. To move the portable welding machine, stop the machine and cut off the power first ； If welding is stopped suddenly, the welder should be turned off immediately. 7. When welding in crowded areas, barriers should be installed to block the arc light; in the absence of such barriers, those around should be warned not to look directly at the arc light. 8. Wear gloves when changing welding rods, and avoid resting your body against metal plates or other conductive objects. Protective glasses should be worn when knocking off slag. 9. When welding non-ferrous metal components, ventilation for exhaust should be improved, and a filtered gas mask should be used if necessary. 10. When repairing gas pipes or welding in areas where gas is leaking, it is necessary to inform the gas station as well as the fire and safety departments in advance; work may only proceed upon obtaining their permission. Before starting work, the gas supply must be turned off, ventilation improved, and any accumulated gas removed completely. 11. After completing the work, turn off the welding machine and then disconnect the power supply. Gas shielded welding workflow 1 Before starting work: 1. The welding machine and heater must be properly grounded, and the welding torch must have good insulation. 2. Gas cylinders or pipeline valves must be in good condition; when moving a cylinder, its lid must be properly closed. 3. The power supply voltage must not fluctuate by more than ±10% of the rated input voltage value; only under such conditions may it be used. 4. All instruments and meters on the welding machine must be complete and in good condition. 5. The tool accessories are complete and in good condition. 6. The working environment should meet the requirements. 7. Check that the bottom of the welding machine is clean and free of debris, ensuring that no metal particles are present. 2 During operation: 1. After the pre-shift inspection is successful, first turn on the main power switch quickly, and then turn on the control power switch. A green light indicates that the welder is working properly. 2. Check whether the cooling fan is operating properly and whether the air flow path is unobstructed. It is strictly prohibited to use the equipment without cooling. 3. Turn on the gas inspection switch, open the gas valve, and check whether the gas valve is in good condition ； Adjust the gas flow rate to 10? /FONT>20 liters per minute. 4. Connect the drive mechanism of the wire feeding system, check whether the wire feeding speed is uniform, and adjust it to an appropriate value. 5. Connect the main welding circuit to conduct a test weld. Adjust the current and voltage according to the welding process requirements, as well as the wire feed wheel pressure and the distance between the welding tip and the base material, while continuously monitoring the quality of the weld. Adjust it to correct it and bring it to an optimal position. 6. Welding can be carried out only when everything is normal. 7. The following points should be noted when using the welding torch: ① During continuous use, the welding current and duty cycle of the welding torch must be kept within the ranges specified in the ratings for that torch. ②To extend the service life of the nozzle and the conductive tip, a layer of anti-clogging agent should be applied before use to prevent them from sticking to welding spatter. ③The nozzle must be cleaned regularly to prevent the air outlet from being blocked by splashes, ensuring unobstructed airflow and avoiding short circuits in the welding power supply that could damage the electrical components inside the device. The conductive nozzle should be checked regularly when in use. If there is wear or blockage, it should be replaced immediately. ④After use, the welding torch should be placed in a safe location; it is prohibited to leave it on the welded piece. 8. Pay constant attention to the wire feeding process during operation; the tensioning wheels must not be too loose or too tight, and the wire wheel tubes must not have sharp bends, with a minimum radius of curvature of >300 millimeters. 9. Fans are strictly prohibited at the welding site to ensure the protective effect of gases. 10. When leaving the workstation, the gas and electrical circuits should be turned off, and the power supply must be disconnected before leaving. 3 After work: 1. Turn off the gas and electrical circuits, cut off the power supply, clean up the work area, check for and extinguish any sparks present, and place tools and accessories in their designated locations. 2. Perform proper maintenance of the welding machine in accordance with the maintenance procedures. 3. Carry out proper shift handover. Argon arc welding procedure: 1. Before welding, prepare the argon cylinder; equip it with an argon flow meter, and then connect it to the air inlet hole on the back panel of the welder using an air pipe. Ensure that the connections are secure to prevent leaks. 2. Connect the TIG welding torch, gas connector, cable quick connector, and control connector to the corresponding sockets on the welding machine respectively. The workpiece is connected to the “+” terminal through the welding ground wire. 3. Connect the power cable of the welder and check whether the grounding is secure. 4. After connecting the power supply, select either AC TIG welding or DC TIG welding according to the welding requirements, and move the circuit switch and control switch to the AC or DC position. Note: The two switches must be used simultaneously. 5. Set the welding method switch to the “TIG” position. 6. Open the argon cylinder and flow meter, and set the gas testing switch to the “Testing” position; at this point, gas will flow out of the welding torch. After adjusting the gas flow, set both the testing and welding switches to the “Welding” position. 7. The magnitude of the welding current can be adjusted using the current control knob; rotating it clockwise reduces the current, while rotating it counterclockwise increases it. The current regulation range can be defined using the current size selector switch. 8. Select the appropriate tungsten rod and corresponding collet, then grind the tungsten rod to the desired taper and install it in the welding gun. Once these steps are completed, simply press the switch on the welding gun to begin welding.