Spot welding nozzle

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Old 03-08-05, 05:37 AM
Yves514
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Question Spot welding nozzle

Hello Everyone,

I just bought a spot weld nozzle for my MIG. It was on sale so I figured I'd get it and try it out. It's got four holes at the end of the nozzle and it seems longer than the regular one. I'm just curious if anyone know how this is suposed to be used? Is it so you can lean the nozzle flush onto the workpiece and tack? I'm using gas and not flux wire. I'm guessing that's why it's got the holes. Anyways, just curious if anyone has ever used one of these. Regardless, I'll probably try it out this weekend and see what it does...
 
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Old 03-08-05, 10:52 AM
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Yves,

I personally don't have a clue.
Got a link to a picture?
 
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Old 03-09-05, 06:15 AM
Yves514
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Originally Posted by GregH
Got a link to a picture?
Here's a picture of it:

<img src="http://www.streamwave.com/~yves/images/spotweld.jpg">
Image credit; streamwave.com
 

Last edited by GregH; 03-09-05 at 09:13 AM. Reason: Coded image
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Old 03-09-05, 06:44 AM
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I looked up spot welding nozzles when I first read your post since I had never heard of one. Only reason I can think of for the holes is if you have to have the tack in EXACTLY a small area. That way you could see the end of the wire before you flipped your hood down and squeezed the trigger.
 
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Old 03-09-05, 07:57 AM
Yves514
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Well, I did a bit of research myself. I didn't realize this was such a mystery. From what I found, professional spot welding is difficult to achieve without the proper timing equipment. Some people are saying you can achieve a similar strength by doing plug welding. This is where you drill a hole in the first layer, then press the two layers together with your nozzle and spot/plug weld the hole. So I'm guessing this nozzle is for that. I will have to try that. Sounds like fun!
 
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Old 03-09-05, 09:22 AM
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Veeeeery interesting!

Yves,

Didn't know such a thing existed.
And, didn't know what drilling the top piece to allow the weld to penetrate into the bottom piece was called.

I do this quite often when reinforcing things, even thick material.

I looked at the Lincoln site but they didn't have any info on this accessory.
You should be able to call them and I'm sure they would have a product brochure on it.
We'd all be interested in knowing what it is all about.
 
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