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  • This welding rod fits into an electrode holder which is insulated and allows the operator

  • to safely hold the electrode without danger of receiving an electric shock. The rod can

  • be positioned in the holder in a number of different ways depending on operator preference

  • or the position of the work being welded.

  • When the welding machine is on and the ground clip is connected to the steel table or to

  • the work itself anything metal on this table is now charged. When the electrode makes contact

  • with the work it completes a circuit with the electricity flowing through the electrode

  • holder, down through the work, and back out to the ground clamp back to the welder.

  • When an arc is struck a common pool of molten metal is created between the two pieces that

  • are being joined. Into this the melting alloy center of the welding rod is deposited completing

  • the weld. One thing to be careful of as you're welding this rod is being consumed. That is,

  • it's growing shorter. So, the operator has to constantly be aware of both moving the

  • rod laterally but also pushing the rod into the seam being welded.

  • The first step in learning how to arc weld is learning how to strike the arc. Striking

  • the arc can sometimes be very difficult at first. It's a delicate flicking motion. It's

  • not a stabbing or a quick drag, but as if you're striking a match gently. Once the arc

  • has started the trick is to maintain a nice, smooth molten puddle of metal with a consistent

  • distance between the tip of the welding rod and the surface of the work.

  • Alright. Let's give it a try. Welding hoods down. Remember, never look at an arc with

  • the naked eye.

  • Now that you've mastered striking the arc, and it may have taken you several tries don't

  • be discouraged, let's join some metal together. OK, hoods down. After striking the arc I create

  • a nice, even pool of molten metal. You'll notice that the tip of the welding rod stays

  • very near to the arc puddle and that I'm also slightly wavering the tip of the electrode

  • back and forth. The idea is to heat both pieces of metal evenly as the filler rod is being

  • deposited.

  • Once you've completed your arc welded seam you'll notice that there's a blue-black residue

  • on top of the weld. This residue is a byproduct of the burning flux. It needs to be cleaned

  • away from the weld. You can do this with a chipping hammer and wire brush.

This welding rod fits into an electrode holder which is insulated and allows the operator

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B2 中上級

アーク溶接の方法|溶接 (How to Arc Weld | Welding)

  • 79 6
    Cheng-Hong Liu に公開 2021 年 01 月 14 日
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