|
Posted by SteveB on November 11, 2007, 1:29 am
Please log in for more thread options
I have run a ton of 7018 at dcrp. 2g, 4g, and 6g certified x ray. I haven't
done any in quite a while. A neighbor gave me a Lincoln tombstone AC
machine, and another wants me to weld some 1/2" x 3" flat bar. The joint
would be a butt, but with a bevel in it.
I know how to do this with an open root 6010, and a 7018 cover, but am
unsure with this AC. I'm afraid of burning through. I think I'll get some
flat bar to practice on. What I was thinking of is beveling it, but not
leaving an open root, and letting the two pieces contact along the point of
the bevel. Run the first pass with small 7018 on both sides, then with
larger 7018 on both sides, alternating sides each time.
I'm doing this with limited equipment and some that I'm not totally familiar
with. Were this an ac/dc machine, I wouldn't hesitate.
Does that sound like it would work? And what is Lincoln's 7018 called?
Fleet weld? Jet weld? And is there a specific 7018 AC rod, or will any
7018 run AC. I have a welding dictionary sized book, but haven't seen it
since I moved.
Sheesh. It's like I'm starting over. I had a brain injury a couple of
years ago, and I know I know this stuff. But sometimes ................
Thanks.
Steve
|
|
Posted by Grant Erwin on November 11, 2007, 12:55 am
Please log in for more thread options
SteveB wrote:
> I have run a ton of 7018 at dcrp. 2g, 4g, and 6g certified x ray. I haven't
> done any in quite a while. A neighbor gave me a Lincoln tombstone AC
> machine, and another wants me to weld some 1/2" x 3" flat bar. The joint
> would be a butt, but with a bevel in it.
>
> I know how to do this with an open root 6010, and a 7018 cover, but am
> unsure with this AC. I'm afraid of burning through. I think I'll get some
> flat bar to practice on. What I was thinking of is beveling it, but not
> leaving an open root, and letting the two pieces contact along the point of
> the bevel. Run the first pass with small 7018 on both sides, then with
> larger 7018 on both sides, alternating sides each time.
>
> I'm doing this with limited equipment and some that I'm not totally familiar
> with. Were this an ac/dc machine, I wouldn't hesitate.
>
> Does that sound like it would work? And what is Lincoln's 7018 called?
> Fleet weld? Jet weld? And is there a specific 7018 AC rod, or will any
> 7018 run AC. I have a welding dictionary sized book, but haven't seen it
> since I moved.
There is 7018AC.
The 7018 I use is a Lincoln product called "Excalibur" and
I like it extremely. This is not to say there aren't other Lincoln
7018 products, there very likely are.
I don't think you will have burning through problems with AC - normally
guys have problems with rods starting, but I never heard of a rod running
hotter on AC amps than the equivalent number of DC amps.
GWE
|
|
Posted by RoyJ on November 11, 2007, 10:55 am
Please log in for more thread options Lincoln has a 7018AC rod that is designed for AC, runs fine at DC +/-
The rest of the Lincoln 7018 rods will run on AC just not as nice as DC.
Full specs on all Lincoln rods at
http://content.lincolnelectric.com/pdfs/products/literature/c210.pdf
SteveB wrote:
> I have run a ton of 7018 at dcrp. 2g, 4g, and 6g certified x ray. I haven't
> done any in quite a while. A neighbor gave me a Lincoln tombstone AC
> machine, and another wants me to weld some 1/2" x 3" flat bar. The joint
> would be a butt, but with a bevel in it.
>
> I know how to do this with an open root 6010, and a 7018 cover, but am
> unsure with this AC. I'm afraid of burning through. I think I'll get some
> flat bar to practice on. What I was thinking of is beveling it, but not
> leaving an open root, and letting the two pieces contact along the point of
> the bevel. Run the first pass with small 7018 on both sides, then with
> larger 7018 on both sides, alternating sides each time.
>
> I'm doing this with limited equipment and some that I'm not totally familiar
> with. Were this an ac/dc machine, I wouldn't hesitate.
>
> Does that sound like it would work? And what is Lincoln's 7018 called?
> Fleet weld? Jet weld? And is there a specific 7018 AC rod, or will any
> 7018 run AC. I have a welding dictionary sized book, but haven't seen it
> since I moved.
>
> Sheesh. It's like I'm starting over. I had a brain injury a couple of
> years ago, and I know I know this stuff. But sometimes ................
>
> Thanks.
>
> Steve
>
>
|
|
Posted by JohnM on November 11, 2007, 6:48 pm
Please log in for more thread options I believe Lincoln's AC 7018 is labeled LH73. It's a nice rod to run,
best AC LH I've used (airco sells one, comes from the Lincoln plant but
apparently made to different specs, I tried it a couple of times and
just hated it).
IIRC, that particular rod works well with DCEP, it will let you make a
little narrower puddle than LH70. Nice on something that's a little thin
for comfort.
John
|
| Similar Threads | Posted | | 7018 rods question | April 21, 2008, 1:21 pm |
| OA regs questions | April 6, 2007, 7:33 pm |
| Questions about new TIG machine | August 26, 2007, 10:23 pm |
| Gas lens questions | June 2, 2008, 12:15 pm |
| Plasma torch questions | April 26, 2007, 5:20 pm |
| newbie brazing questions | July 24, 2007, 11:57 am |
| Questions for the Australians in the group | October 4, 2007, 7:38 pm |
| Mechanical motor questions ..... | March 19, 2008, 12:55 am |
| 3F WABO test questions | April 9, 2008, 6:14 pm |
| Re: 110vt buzzbox questions | April 21, 2008, 3:44 pm |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
> done any in quite a while. A neighbor gave me a Lincoln tombstone AC
> machine, and another wants me to weld some 1/2" x 3" flat bar. The joint
> would be a butt, but with a bevel in it.
>
> I know how to do this with an open root 6010, and a 7018 cover, but am
> unsure with this AC. I'm afraid of burning through. I think I'll get some
> flat bar to practice on. What I was thinking of is beveling it, but not
> leaving an open root, and letting the two pieces contact along the point of
> the bevel. Run the first pass with small 7018 on both sides, then with
> larger 7018 on both sides, alternating sides each time.
>
> I'm doing this with limited equipment and some that I'm not totally familiar
> with. Were this an ac/dc machine, I wouldn't hesitate.
>
> Does that sound like it would work? And what is Lincoln's 7018 called?
> Fleet weld? Jet weld? And is there a specific 7018 AC rod, or will any
> 7018 run AC. I have a welding dictionary sized book, but haven't seen it
> since I moved.