Magnets

ekbmuts · Wed Oct 02, 2019 10:40 pm

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

Ballistic308 · Thu Oct 03, 2019 12:26 am

You pretty much nailed it. Magnetic polarity from the magnet interfering with the active magnetic field of the arc.

Oscar · Thu Oct 03, 2019 9:17 am

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.

Homemade · Thu Oct 03, 2019 12:41 pm

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

ekbmuts · Fri Oct 04, 2019 3:58 pm

Fascinating! Thanks all.

I'm in Google right now - yep, a little more than knee-deep...

Jon

VA-Sawyer · Fri Oct 04, 2019 6:18 pm

When your eyeballs begin rolling back in your head, stop reading, and get back to welding.

ekbmuts · Fri Oct 04, 2019 7:37 pm

LOL! Yeah, I lasted about 3 minutes before my head started to hurt...

BillE.Dee · Fri Oct 04, 2019 9:23 pm

I get to reading that stuff and my head hurts and I start looking like that dog on the rca commercial.

Oscar · Fri Oct 04, 2019 9:54 pm

not me, I crave it. I'm kinda pissed I can't find my textbook on Differential Geometry.

Louie1961 · Sat Oct 05, 2019 6:53 am

Oscar, you sound like my daughter...she wants to double major in aerospace engineering and astrophysics

VA-Sawyer · Sat Oct 05, 2019 9:45 am

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.

LtBadd · Sat Oct 05, 2019 10:59 am

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

VA-Sawyer · Sat Oct 05, 2019 5:37 pm

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.

rick9345 · Sun Oct 06, 2019 1:25 am

Richard

Back in my day we had nine planets!

Skilled labor isn't cheap / Cheap labor isn't skilled

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LtBadd
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What I am so old we didn't even have planets