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Index >> Physics of Welding >> Remedies for Arc Blow

Remedies for Arc Blow

Remedies for Arc Blow - Arc blow can be minimized by keeping the following factors in view:
1. Electrode geometry in non consumable electrode welding (e.g., TIG and carbon arc welding).
2. Changing the position of earth clamp or current return lead and welding away from the earth connection.
3. Avoiding the presence of (or rearranging) magnetic materials around the workpiece and arc.
4. Storing workpieces away from magnetic sources, such as welding power sources.
5. Lowering the arc current.

6. Welding in the direction of a heavy tack weld, from ground connection.
7. Put earth clamp far away from the joint to be welded.
8. Employing ground connections more than one.
9. Going for MIG welding (with short circuiting metal transfer) in place of flux covered metal arc welding.
10. Coiling the ground cable around the workpiece.
11. Using a short arc.

12. Using a transformer in place of a generator.
13. Employing a wider piece for welding.
14. Using smaller diameter electrodes.
15. Decreasing arc travel speed.
16. Superimposing a counteracting externally applied longitudinal magnetic field.
17. Increasing the flow rate of the shielding gas in TIG welding.
18. Preheating the parts before welding.
19. Employ back stepping technique on longer welds.
20. An arrangement for eliminating end arc blow when seam welding hot water tank. The shoe slides with the head, switching to forward position near the end of the weld.

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