How to Weld an Overhead V Joint Flux Core
Creating an overhead weld, particularly an overhead flux weld, is no easy matter. Not only is it much more difficult to weld in a straight line and create an aesthetically pleasing weld with integrity, creating overhead flux-cored welds is more risky because, should the melted flux have nowhere to go on the ceiling, it may drip down onto you, and burn you. Weld as safely as possible, and if you are inexperienced with overhead welding, consult a welding expert before you start working.
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Instructions
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Place the two beveled parts of the V-joint next to each other, so that they match up perfectly. Matching is particularly important, because you are welding overhead. Matching increases the likelihood that slag will not fall on you when you weld.
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Strike the welding electrode on the surface of the metal that you are welding. Keep the electrode between 1/4 inch and 3/4 inch from the surface of the metal. Point the wire square of the electrode towards the welding joint.
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Weave the welding electrode over the surface of the joint, in a rapid and slight side-to-side motion. Find a combination of speed and movement that creates a welding puddle, without causing dripping.
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Allow the weld to cool for several hours, before you examine the weld to visually detect any cracks. Pass the welding tool over the joint again, if necessary.
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