It is currently Sat Sep 23, 2017 9:32 pm Advanced search

Magnets

mig and flux core tips and techniques, equipment, filler metal

Magnets

Postby Scott Morris » Wed Apr 26, 2017 10:22 am

I have noticed using one of those triangle shaped magnets, it completely changes how the welder sounds and the weld looks. Say if I am welding square tubing to a plate, everytime the first side using the magnet the welder sounds different and the weld is not as good. As soon as I remove the magnet, the welder sounds much better and the weld looks much better. IF I use a clamp to hold the tubing the first pass is normal. Anyone else noticed this? I assume they must work since every weld shop I have been to has them.

Thanks

SM
Scott Morris
New Member
 
Posts: 14
Joined: Thu Mar 30, 2017 10:23 am

Re: Magnets

Postby exnailpounder » Wed Apr 26, 2017 10:40 am

Magnets will definitely screw with your arc. It's even worse on Tig. You need to avoid having a magnet in your immediate weld area. Also if you heat up a magnet, it will ruin it.
Ifyoucantellmewhatthissaysiwillbuyyouabeer.
exnailpounder
Weldmonger
 
Posts: 2461
Joined: Thu Dec 25, 2014 9:25 am
Location: near Chicago

Re: Magnets

Postby Scott Morris » Wed Apr 26, 2017 10:43 am

exnailpounder wrote:Magnets will definitely screw with your arc. It's even worse on Tig. You need to avoid having a magnet in your immediate weld area. Also if you heat up a magnet, it will ruin it.


Thanks, glad to know it is not just me......


SM
Scott Morris
New Member
 
Posts: 14
Joined: Thu Mar 30, 2017 10:23 am

Re: Magnets

Postby Coldman » Wed Apr 26, 2017 4:41 pm

The idea is to tack while the magnet holds the pieces in place and remove the magnet to weld out.


Sent using Tapatalk
Flat out like a lizard drinkin'
Coldman
Weldmonger
 
Posts: 1079
Joined: Mon Dec 15, 2014 2:16 am
Location: Oz

Re: Magnets

Postby bruce991 » Thu Apr 27, 2017 8:58 pm

I can tack with one close but that is it, in TIG you will notice arc rolls around and around and acts like wind is blowing across it.
bruce991
Guide
 
Posts: 141
Joined: Tue Jan 05, 2016 10:31 pm
Location: Central Michigan

Re: Magnets

Postby weldin mike 27 » Fri Apr 28, 2017 7:10 am

Its called arc blow.
User avatar
weldin mike 27
Weldmonger
 
Posts: 3355
Joined: Fri Apr 01, 2011 10:59 pm
Location: Australia; Victoria

Re: Magnets

Postby Scott Morris » Mon May 01, 2017 10:08 am

weldin mike 27 wrote:Its called arc blow.


Thanks....... learning something new everyday.



SM
Scott Morris
New Member
 
Posts: 14
Joined: Thu Mar 30, 2017 10:23 am

Re: Magnets

Postby Otto Nobedder » Mon May 01, 2017 6:34 pm

Arc blow can also happen in the absence of magnets, if something has magnetized the metal such as cold-working, or previous welds in the presence of a magnetic field. It's more obvious when stick welding.

Steve S
User avatar
Otto Nobedder
Weldmonger
 
Posts: 8386
Joined: Thu Jan 06, 2011 11:40 pm
Location: Near New Orleans

Re: Magnets

Postby weldin mike 27 » Tue May 02, 2017 6:19 am

Quite true Steve. It happens regularly while stick welding on dc. I've had a few issues with it, (If you call wanting to throw your project through a wall an issue) and this was simply the natural magnetic field. Moving the earth clamp around can help.
User avatar
weldin mike 27
Weldmonger
 
Posts: 3355
Joined: Fri Apr 01, 2011 10:59 pm
Location: Australia; Victoria


Return to Mig and Flux Core - gas metal arc welding & flux cored arc welding