The common sense and method safety of electric welders, the operating procedures are as follows:
1. You should master general electrical knowledge, follow the general safety regulations of welders, and be familiar with fire extinguishing technology, first aid for electric shock and artificial respiration methods.
2. Before work, check whether the power line, lead-out line and each connection point of the welding machine are in good condition. The line crossing the roadway should be elevated or covered; good.
3. Open-air welding is not allowed on rainy days. When working in wet areas, you should stand on the place where insulating materials are laid and wear insulating shoes.
4. The wiring or inspection of the mobile welding machine from the power grid, and grounding should be done by electricians.
5. When pushing the knife switch, the body should be tilted a little, and then the electric welding machine should be turned on after one push; the electric welding machine must be turned off before the power knife switch can be pulled off.
6. To move the position of the welding machine, stop the machine and cut off the power first; if it stops suddenly during welding, turn off the welding machine immediately.
7. When welding in crowded places, a barrier should be installed to block the arc light. If there is no barrier, the surrounding personnel should be reminded not to look directly at the arc light.
8. Wear gloves when changing electrodes, and don’t lean your body against iron plates or other conductive objects. Wear protective glasses when knocking slag.
9. When welding non-ferrous metal devices, ventilation and detoxification should be strengthened, and filter gas masks should be used if necessary.
10. When repairing gas pipes or welding where gas leaks, you must notify the gas station, fire protection, and safety technology department in advance, and work only after getting permission. .
11. After the work is completed, the welding machine should be turned off, and then the power supply should be disconnected.
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Gas shielded welding machine operating procedures
1. Before work
1. The grounding of the welding machine and heater must be reliable, and the insulation of the welding torch must be good.
2. Gas cylinders or pipeline gas valves should be intact, and the caps should be closed when handling gas cylinders.
3. The fluctuation range of the power supply voltage shall not exceed ±10% of the rated input voltage before use
4. Various instruments and meters on the welding machine should 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 whether the bottom of the welding machine is clean and free of debris, and strictly prevent the existence of metal particles.
Two, at work
1. After passing the pre-shift inspection, first turn on the main power switch, the action should be quick, and then turn on the control power switch. Green light means the welding machine is normal.
2. Check whether the cooling fan is running normally and whether the air path is unimpeded. Do not use the device without cooling.
3. Turn on the gas detection switch, open the gas valve, and check whether the gas valve is in good condition; adjust the gas flow to 10? /FONT>20 liters/min.
4. Connect the transmission part of the wire feeding mechanism, check whether the wire feeding speed is uniform, and adjust it to an appropriate value.
5. Connect the main welding circuit for test welding. Adjust the current, voltage, wire feed wheel pressure and the distance between the welding tip and the base metal according to the requirements of the welding process, and observe the quality of the weld at any time. Correct it and adjust it to a better position.
6. Welding can only be done after everything is normal.
7. The following items should be paid attention to when using the welding torch:
① In continuous use, the welding current and duty cycle of the welding torch should be controlled within the range specified in the rating table of all welding torches.
②In order to prolong the service life of the nozzle and contact tip, a layer of anti-blocking agent should be applied before use to prevent it from sticking to welding spatter.
③The nozzle must be cleaned frequently to prevent the air outlet from being blocked by spatter, to ensure the smooth flow of the gas path and to prevent the short circuit of the welding power source from damaging the electrical components inside the machine. The contact tip should be checked frequently during use. Replace immediately if worn or clogged.
④ After the welding torch is used up, it should be placed in a reliable place, and it is forbidden to put it on the weldment.
8. Pay attention to the welding wire conveying situation at any time during the work. The tension wheel should not be too loose or too tight, the welding wire wheel tube should not have sharp bends, and the minimum curvature radius should be > 300 mm.
9. It is strictly forbidden to use fans at the welding site to ensure the protective effect of the gas.
10. When leaving the post, the gas circuit and circuit should be closed, and the power can be cut off before leaving.
3. After work
1. Close the air circuit and circuit, cut off the power supply, clean up the work site, check and extinguish the sparks on site, and put the tool accessories in the specified place.
2. Do a good job in the maintenance of the welding machine according to the maintenance regulations.
3. Do a good job in shift work.
Argon arc welding operating procedures
1. Before welding, the argon gas bottle should be prepared first, and the argon gas flow meter should be installed on the bottle, and then the gas pipe should be connected to the air inlet hole on the back panel of the welding machine. The connection should be tight to prevent air leakage.
2. Connect the argon arc welding torch, gas connector, cable quick connector and control connector to the corresponding sockets of the welding machine respectively. The workpiece is connected to the “+” terminal through the welding ground wire.
3. Connect the power cord of the welding machine and check whether the grounding is reliable.
4. After connecting the power supply, choose AC argon arc welding or DC argon arc welding according to welding needs, and move the line switching switch and control switching switch to AC (AC) or DC (DC) gear. Note: The two switches must be used synchronously.
5. Set the welding mode switching switch to the “argon arc” position.
6. Turn on the argon gas cylinder and flow meter, and pull the test gas switch to the “test gas” position. At this time, the gas flows out from the welding torch. After adjusting the air flow, pull the test gas and welding switch to the “welding” position.
7. The size of the welding current can be adjusted with the current adjustment handwheel, the current decreases when it is rotated clockwise, and the current increases when it is rotated counterclockwise. The current adjustment range can be limited by the current size changeover switch.
8. Select the appropriate tungsten rod and the corresponding chuck, then grind the tungsten rod into a suitable taper, and install it in the welding torch. After the above work is completed, press the switch on the welding torch to start welding.
Post time: Aug-09-2023
