Hi there
Having a difficult time with Pulse-GMAW of Ali in greater thicknesses.
Compared to previous happy times where after a very few days I'm
considered the master of the job.
Do not have yet a "model" or "multi-dimensional map" giving a
rationale of where to find the best conditions for new situations with
Pulse.
Previously I've used
* spray transfer for anything >=10m/min wire-feed-speed
* pulse only for thinner low heat demand things like outside-corner
welds sealing end-cap plates onto Al-Si-Mg 6082 extruded Rectangular
Hollow Sections
So I'm trying to Pulse where previously I've used spray.
Thicknesses...
Mostly 5mm (in 5083 (marine Al-Mg) plate)
(* (/ 5 25.4) 16) 3.1496062992125986
which is just under 3/16" plate thickness.
So not great thicknesses (done 1/4" sections to 3/4" plate Ali before)
The machine has two knobs at the wire-feeder.
One increases the thickness it is supposed to be welding on - and it
reports the Amps go up seemingly in proportion.
The other is a "trim" which might be related to Voltage?
I only have a list of welding conditions which worked in specific
cases.
I wish that like eg. doing any spray-transfer I have a "map" of
the "contours" of good conditions and can see from a small test weld
where I am in the "map" and have a very accurate guess of where I need
to be to land on good conditions for a new previously unfamiliar job.
I have seen very good welds where I would be using Pulse anyway, so
don't doubt the machine (well, I've seen others sink into
"anglo-saxon" borrowing it and finding glitches, but anyway...)
I sometimes end up with good welds but fillet sizes bigger than called
for because there simply does not seem to be the fluidity to run beads
at the minimum size.
So - Pulse GMAW Ali (aluminium, aluminum) - anyone point me to a way
of seeing an overarching sense for it?
Build that "multi-dimansional contour map" to know where to look for
the good conditions in any new circumstance?
Thanks in advance
On 12/17/2021 12:34 AM, Richard Smith wrote:
Hi there
... ... ...
Thanks in advance
...
... I do have a fairly decent
Miller continuous DC MIG welder with just two electrical adjustments.
Well not counting the on/off switch. ...
I will repeat something I have come to believe. Pulse is primarily to
allow for heat management, ... ...
To me it seems counter intuitive to use pulse for thicker
aluminum. Again. I am open to being wrong.
... not tried is other gas mixes. ... ...
I wish Ernie was still a active on this group. He would have very
much been able to help you.
Late contributor - correction - "motor neurone disease" == "ALS"
Bob La Londe <none@none.com99> writes:
On 12/17/2021 12:34 AM, Richard Smith wrote:
Hi there
... ... ...
Thanks in advance
...
... I do have a fairly decent
Miller continuous DC MIG welder with just two electrical adjustments.
Well not counting the on/off switch. ...
I haven't tried Ali with a copper-and-iron GMAW / MIG welding machine.
I suspect a good one would be very good for spray-transfer Ali.
The consistency, and the way that the "operating map" of a
copper-and-iron machine is well known...
Bob La Londe <none@none.com99> writes:
...
...
I wanted to be open-minded and watch independent response come in.
...
...
On 12/20/2021 12:45 PM, Richard Smith wrote:
Bob La Londe <none@none.com99> writes:
...
...
I wanted to be open-minded and watch independent response come in.
I think this group just doesn't have many experts such as yourself any longer. I believe Ernie has a Facebook page where he still shares his expertise, but based on responses to my own queries there are only a few
here on Usenet still willing to help. When I was first really trying to
get over the hump so I could chicken poop some metal together and dry
the poop before it fell apart I would post exact problems here and often
have a handful of very close overlapping recipes to start from.
Current, settings, wire feed, gun speed, etc. I think that day is
past. Now if I have a technical problem with a weld I'll check the
usual YouTube video experts (Weld.com & Welding Tips & Tricks are both
good) to see if they have something that overlaps what I want to do, and
then I'll ask a carefully crafted question on the Miller Welds forum. Internet welders are an independent lot (like Internet machinists) and
often refuse to answer the question you actually asked.
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