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Magnets
Posted: Wed Oct 02, 2019 10:40 pm
by ekbmuts
Can anyone explain the phenomena of magnets close to the weld?
I had two pieces of 1/2" round steel rod held at 90 degrees to each other with a triangular magnet. As I welded, the arc went crazy the closer I got to the magnet.
I'm assuming this is an electromagnetic effect. Certainly was surprising to me when it happened.
Jon
Re: Magnets
Posted: Thu Oct 03, 2019 12:26 am
by Ballistic308
You pretty much nailed it. Magnetic polarity from the magnet interfering with the active magnetic field of the arc.
Re: Magnets
Posted: Thu Oct 03, 2019 9:17 am
by Oscar
Generally guided by the Lorentz Force. The magnetic field not only interacts with the magnetic field generated by the arc, but with the electrons themselves, since they are electrically charged particles. Both positively and negatively charged particles experience this force. A quick Google will reveal more than you will want to learn about it.
Re: Magnets
Posted: Thu Oct 03, 2019 12:41 pm
by Homemade
Arc blow is the common term used. Similar circumstances when welding a piece and it will naturally become magnetized by the arc and the start to pull the arc off to the side.
Switch to ac
Re: Magnets
Posted: Fri Oct 04, 2019 3:58 pm
by ekbmuts
Fascinating! Thanks all.
I'm in Google right now - yep, a little more than knee-deep...
Jon
Re: Magnets
Posted: Fri Oct 04, 2019 6:18 pm
by VA-Sawyer
When your eyeballs begin rolling back in your head, stop reading, and get back to welding.
Re: Magnets
Posted: Fri Oct 04, 2019 7:37 pm
by ekbmuts
LOL! Yeah, I lasted about 3 minutes before my head started to hurt...
Re: Magnets
Posted: Fri Oct 04, 2019 9:23 pm
by BillE.Dee
I get to reading that stuff and my head hurts and I start looking like that dog on the rca commercial.
Re: Magnets
Posted: Fri Oct 04, 2019 9:54 pm
by Oscar
not me, I crave it. I'm kinda pissed I can't find my textbook on Differential Geometry.
Re: Magnets
Posted: Sat Oct 05, 2019 6:53 am
by Louie1961
Oscar, you sound like my daughter...she wants to double major in aerospace engineering and astrophysics
Re: Magnets
Posted: Sat Oct 05, 2019 9:45 am
by VA-Sawyer
They say "There is one in every group". In this group, that One is Oscar.
I like learning new things, but sometimes it hurts my head too.
Re: Magnets
Posted: Sat Oct 05, 2019 10:59 am
by LtBadd
VA-Sawyer wrote:They say "There is one in every group". In this group, that One is Oscar.
I like learning new things, but sometimes it hurts my head too.
Hey Rick, congrats on becoming a guide with 100 posts
Re: Magnets
Posted: Sat Oct 05, 2019 5:37 pm
by VA-Sawyer
Thank you, Richard. I didn't notice, till I read your post.
I hope that I haven't been too much of a 'threadcrapper' getting to this point.
Re: Magnets
Posted: Sun Oct 06, 2019 1:25 am
by rick9345
Richard
Back in my day we had nine planets!
Skilled labor isn't cheap / Cheap labor isn't skilled
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LtBadd
Weldmonger
Posts: 2101
Joined: Sun Apr 12, 2015 3:00 pm
Location: Clearwater FL
What I am so old we didn't even have planets