butt welding 1" plate

[Mark @ Everlast]

Mark, can the MTS 400 run at full throttle in 220V three phase?

No, it's limited to 250 amps on 240V. But it's 100% duty cycle.

 

[Reyer Farms]

How did it turn out bdog?

 

[Arc weld]

Double bevel is easiest. Weld a couple passes on one side and then grind out the other side into your clean weld metal. Alternate sides and check for warping. If it pulls too much one way, move the other side. A little preheat wouldn't hurt but 1/8" and 5/32" 7018 would be a good choice. 3/32" doesn't put a lot of heat into a thick plate like that and without preheat could cause a quenching effect.

 

[bdog]

Turned out well. The angle iron ended up being 3/4" not 1" but still thick enough to need the bevels.

 

[Brad_Blazer]

It looks a lot better than the old one!

 

[bdog]

It looks a lot better than the old one!

Thanks! You were right on the weld volume. Took forever to fill the gap. Took me most the day to make two of these things. Double bevel would have been faster but I was kind of worried about making the cut wrong. Single bevel was easy to cut.

 

[ericher69]

Thanks! You were right on the weld volume. Took forever to fill the gap. Took me most the day to make two of these things. Double bevel would have been faster but I was kind of worried about making the cut wrong. Single bevel was easy to cut.

Good job!

You have the scissor jack to hold the pieces in position and prevent warping?

Sent from my iPhone 5s 64Gb using TractorByNet

 

[Shield Arc]

You have the scissor jack to hold the pieces in position and prevent warping?

That part I don't understand. :confused3:

 

[bdog]

Actually the welding wanted to pull it apart. When I first tacked it it ended up being pushed in a little too close so I used the scissor jack to make it wider.

 

[Shield Arc]

I would have toed in the two legs at least 3/4-inch, and peened the welds.

 

[notme]

or just run a threaded rod thru those lil hole things on the sides, nut on the inside and outside, (4 per rod) tighten them up and that thing aint gonna open up or close up at all. or tack a piece of scrap accros the back if u wanna be cheap.. ;-) but definatly double bevel, so much easier

 

[Arc weld]

When I had to repair my backhoe because the top swing mount ripped off and the bottom 1 1/2" plate bent, I ended up having to grind a bevel in the 1 1/2" plate so I could straighten it. In talking to people experienced with repairs on heavy plate, they suggested against using braces to hold everything from moving. If the piece is restrained from moving actually causes internal stresses from the heat and not being able to expand and contract. I left the plate bend down about 10 deg. and the heat pulled it up a little more than needed. My friend brought his truck out and we used a rosebud to heat it up and pull it into the right position. Some weldments can be clamped to prevent movement but not this type of application. Preheat and peening isn't a bad idea either, just don't beat the crap out of it trying to peen it. That will add stress as well. Looks like it was a pretty good repair though.

 

[sparc]

Strange that you can't find a decent welder (man, not machine) in oil country.
there must be a zillion pipeliners at your local watering hole looking for work,
and most have a welding rig on the back of their truck.

Going to a muffler shop for weld services would not by my choice, first or last.
Might be less expensive but you get what you pay for.

 

[bdog]

It usually was a matter of time. The thing broke and we needed it fixed as quickly as possible so we went to town and stopped at the first place that had a welder.

 

[Gary Fowler]

3/4" is the point at which carbon steel doesn't need to be PWHT to relieve internal stresses from welding as long as you preheat it to 200F before welding. I would have double beveled it even if I had to do it with a grinder if not sure of the cut as you reported. That wouldn't have taken as long as putting on the full single bevel AND about half the time to weld it.
It does not look bad for welding even though it took triple the time, warpage doesn't look bad either.