Cutting Techniques for MIG Welding

20-08-2010
Cutting techniques for MIG welding:
1. Maintain a 1/4-3/8 inch extension of the welding wire rod (the length of welding wire protruding from the welding gun head).
2. Use small diameter welding wires when welding thin plates; When welding thick plates, use large diameter welding wires and high current welding machines. Check the specific performance recommended by the welding machine.
3. Use the correct welding wire to weld the workpiece. Stainless steel welding wire welding stainless steel, aluminum welding wire welding aluminum, and steel welding wire welding steel.
4. Use the correct protective gas. Carbon dioxide is very suitable for welding steel, but when used to weld thin plates, the temperature may be too high. A mixture of 75% argon and 25% carbon dioxide should be used to weld thinner materials. Welding aluminum can only use argon gas. When welding steel, you can also use a mixture of three gases (helium+argon+carbon dioxide).
5. To achieve the best effect of controlling the weld bead, the welding wire should be kept directly aligned with the bonding edge of the molten pool.
6. When the welding operation is in an abnormal position (vertical welding, horizontal welding, overhead welding), a small molten pool should be maintained to achieve optimal control of the weld bead, and the smallest diameter welding wire should be used as much as possible.
7. Ensure that the size of the welding wire you are using matches the nozzle, liner, and drive roller. Imported pump
8. Regularly clean the welding gun liner and drive roller to keep the welding gun mouth free of splashes. If the welding gun mouth is blocked or the wire feeding is not smooth, replace it.
9. When welding, try to keep the welding gun straight to avoid wire feeding issues.
10. When welding, use both hands simultaneously to ensure the stability of the welding gun, and do so as much as possible. (This also applies to electrode welding, TIG welding, and plasma cutting).
11. Adjust the tightness of the welding wire disc and driving roller of the wire feeder to just enough for wire feeding, not too tight.
12. When the welding wire is not in use, store it in a clean and dry place to avoid contamination that may affect the welding effect.
13. Use DC reverse polarity DCEP power supply.
14. The drag (pull) welding gun technique can achieve deeper penetration and narrower welds. The gun pushing technique can achieve shallower penetration and wider weld seams
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