Splicing a small I beam together

[downsizingnow48]

Thanks to ericher69 and commenters for a very instructive thread. I'm getting ready to weld up a thumb for my B21, which is beyond what I have done in the past. Next week will start a thread asking for advice and critique.

 

[Sodo]

No need to convince me that the splice welded with 252 is good enough

yup! :thumbsup:

Your right; had started and got into it next thing you know I was worried about warping therefore hurried.

One thing I've noticed about posting any project to forums. DURING your project, there are many details you balance that are crucial to the outcome of the project.

- materials available
- alignment
- eqpt available
- TIME available
- time taking pics for TBN ( & re-work necessary before posting )

Once you post a project, all these tasks that were decided at the time (go no-go decisions made) goes out the window. :confused3: Everyone has a different idea what your "finish level" shoulda been. For me, finishing before dark is an important factor more often than I'd ever expect. But still it's all worth it when you get a good suggestion from a member.

 

[ericher69]

Thanks to ericher69 and commenters for a very instructive thread. I'm getting ready to weld up a thumb for my B21, which is beyond what I have done in the past. Next week will start a thread asking for advice and critique.

Your welcome!

I look forward to your project. Will you post here in welding?

Arc Weld; you made a comment about too much heat!

Q-what is the issue with too much heat or amperage vs just right or proper amperage?

Shield Arc taught me to run MIG as hot as I can stand it to prevent cold lap.

Thanks for the input.

Sent from my iPhone 5s 64Gb using TractorByNet

 

[MinnesotaDaveChalmers]

finishing before dark is an important factor more often than I'd ever expect.

I've said "I want to finish before dark" more times than I care to think about....and then pulled out the big lights because I didn't make it :laughing:

Then it becomes "I have to finish this before morning" - because either I need it, or someone else does in the a.m.
Those nights suck

 

[MinnesotaDaveChalmers]

Your welcome!

I look forward to your project. Will you post here in welding?

Arc Weld; you made a comment about too much heat!

Q-what is the issue with too much heat or amperage vs just right or proper amperage?

Shield Arc taught me to run MIG as hot as I can stand it to prevent cold lap.

Thanks for the input.

Sent from my iPhone 5s 64Gb using TractorByNet

I don't see too much heat as a problem - as long as you don't leave undercut or any other flaws.

If that's happening, it's either too hot, or too hot for your technique.
(not sure which caused yours - but could be both?)

In my opinion that is.

Over all I like this thread

 

[ericher69]

I don't see too much heat as a problem - as long as you don't leave undercut or any other flaws. If that's happening, it's either too hot, or too hot for your technique. (not sure which caused yours - but could be both?) In my opinion that is. Over all I like this thread

I believe it was too hot for my technique- not used to welding at this higher amperage level. My previous MIG was a Lincoln SP170-T and I never had the "problem" of too hot; even tho this was a 230V MIG.

All in all it's really not a bad "problem" to have. Just gonna have to practice with it.

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[dragoneggs]

Great thread! Yeah SA taught me to go hot with MIG. Your 252 must be quite the machine. I was amazed with what SA did with my 211. He maxxed out the heat and successfully welded 3/4in plate!

 

[ericher69]

Great thread! Yeah SA taught me to go hot with MIG. Your 252 must be quite the machine. I was amazed with what SA did with my 211. He maxxed out the heat and successfully welded 3/4in plate!

Thanks I've tried a 350P which is the next model up in power but not near maxed out. So yes it does everything I want and then some!

It's rated at 1/2" single pass but with PROPER technique and skill sure it could weld much thicker!

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[BukitCase]

This jig is all 3/4 x 3" FB, done with my 252 with .035 and C25. 20 tons pressure on the pushes, slightly compressed the bottom of the female part during pushes, but no sign of weld damage after making 5 U's out of 1/2" x 3" FB. Cooling fan came on once or twice during weld-out ...Steve

 

[ericher69]

This jig is all 3/4 x 3" FB, done with my 252 with .035 and C25. 20 tons pressure on the pushes, slightly compressed the bottom of the female part during pushes, but no sign of weld damage after making 5 U's out of 1/2" x 3" FB. Cooling fan came on once or twice during weld-out ...Steve

Looks good!

What where your settings?

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