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Cad Weld on steroids #62574
02/20/06 02:23 AM
02/20/06 02:23 AM
gfretwell  Offline
Joined: Jul 2004
Posts: 9,186
Tonight the Discovery Channel has a show on the Cardinals stadium. They are exothermically welding train track rails together. The shot is a container of thermite stuff about the size of a picnic jug. Other than that it looks like the same deal.

Greg Fretwell
Work Gear for Electricians and the Trades
Re: Cad Weld on steroids #62575
02/21/06 12:47 AM
02/21/06 12:47 AM
Celtic  Offline
Joined: Feb 2005
Posts: 361
You should see the grinder they use to clean up the rail!
It almost looks like a grinder attached to a sheet rock/lumber cart that rides the rail so they can grind the rail weld down smoothly and uniformly.

Yes, the shot is huge - so is the flash and resulting "mushroom cloud".

~~ CELTIC ~~
...-= NJ =-...
Re: Cad Weld on steroids #62576
02/21/06 09:07 AM
02/21/06 09:07 AM
Trainwire  Offline
Joined: Mar 2002
Posts: 360
You oughta see the gizmatron that they use when they resistance weld them.

I use tiny cadwelds when I electrically bond the rails together in the gate circuits.

This link has a brief history

Edited because I always think of a better way to say it after I have posted [Linked Image]

[This message has been edited by Trainwire (edited 02-21-2006).]

Re: Cad Weld on steroids #62577
02/21/06 11:21 AM
02/21/06 11:21 AM
C-H  Offline
Joined: Sep 2002
Posts: 1,497
Stockholm, Sweden
I have a picture of a resistance welding machine that weld rails. It's big and there is metal spray everywhere...

{Edit: See picture below. The picture is from Shanghai Mountain Welding. I have their catalogue somewhere with a high quality print, but it is lost in big pile of things from suppliers who we aren't interested in.)

There is a busy railroad close to the office and last summer I watched two gentlemen termite welding the rails outside. This was in June/July and very warm (yes, warm in Sweden!) and they worked with bare torsos. Something doesn't go to plan and one of them grabs a big metal bar and start poking at the bottom of the container. BOOM! A cloud of molten metal surrounded the container and the guy. I was about to pick up the phone to get an ambulance but amazed watched him get back on his feet, seemingly unscathed.

I will never ever get into termite welding...

[Linked Image]

[This message has been edited by C-H (edited 02-21-2006).]


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