Go Back   VetteMOD.com > VetteMOD Workshop > Fabrication Section

Reply
 
Thread Tools
  #1  
Old 10-10-2012, 12:11 PM
GoVetteGo GoVetteGo is offline
United States | Addict
 
Join Date: Sep 2010
Location: Lansdale, PA 19446
Posts: 171
My Photos: (2)
Default MIG Welding Input

I have been stick welding for years. I traded for a Snap On Mig welder a few years back and now have an application for it. The #4 body mount bracket on the passenger side of my Darth Vader Vette is toast.

I played around with the MIG welder a bit yesterday using a couple pieces on 1/8" angle iron.

Please look at the picture and tell me if I am on the right track. The following picture is what I did. A was my first attempt and D was the final effort.

[Only registered and activated users can see links. Click Here To Register...]

With the stick welder, I would adjust the amps to the size rod I was using. My thought with the MIG welder is I have to adjust the heat level with the wire speed - which is what I did. Weld, adjust, weld, adjust until I got to the last pass.

Appreciate your input.

John
__________________
1969 350/350 4 Speed, Riverside Gold
1976 350 4 speed, Guards Red
1978 350 4 Speed Darth Vader Vette - All black!

Reply With Quote
  #2  
Old 10-10-2012, 02:10 PM
Twin_Turbo's Avatar
Twin_Turbo Twin_Turbo is offline
Netherlands | Der Maulwurf
 
Join Date: Mar 2008
Posts: 8,173
My Photos: (1296)
Default

You are making progress. What you need is more heat and maybe wire speed. At the end of D the weld flows into the parent metal jsut fine.

1st rule, CLEAN!! the metal, grind it to bare metal, remove the milling scale.
__________________


[Only registered and activated users can see links. Click Here To Register...]
Reply With Quote
  #3  
Old 10-10-2012, 07:31 PM
Ralphy Ralphy is offline
United States | Addict
 
Join Date: Dec 2009
Posts: 538
My Photos: (22)
Default

My little 110V 90 amp looks worse than that on thicker metals, more like A. The bead sits on top almost like a ball of mercury. I would think heat is/was the issue. Maybe as you proceeded you soaked more heat into the metal? I have a friend who said at times he preheats with a torch.

I agree with TT!

Ralphy
Reply With Quote
  #4  
Old 10-10-2012, 08:44 PM
427Swede's Avatar
427Swede 427Swede is offline
Sweden | Addict
 
Join Date: Jan 2011
Location: East coast of Sweden
Posts: 373
My Photos: (116)
Default

I do not know what type of controls you have on your machine but if it is any good, you should have at least 2 knobs, one to regulate the current and one to regulate wire feed.

The last weld, D looks good!
Try to listen to the sound of the "weld flame", it should sound almost like the sound you hear when you are frying pork. An intense popping sound. If you have a long period between each "pop" you have either too low current or too high wire feed (or a combination of both). If you do not hear any "popping" sound but more like a "hissing" sound you have too high current for your set wire feed. Increase the wire feed or lower the current.
As with a stick welding machine, you can also adjust heat input by changing the angle of the welding handle towards the weld. But I suppose you are very familiar with that since you have been using a stick welder before.
Good luck!!

Daniel
Reply With Quote
  #5  
Old 10-11-2012, 02:39 AM
GoVetteGo GoVetteGo is offline
United States | Addict
 
Join Date: Sep 2010
Location: Lansdale, PA 19446
Posts: 171
My Photos: (2)
Default

Quote:
Originally Posted by 427Swede View Post
I do not know what type of controls you have on your machine but if it is any good, you should have at least 2 knobs, one to regulate the current and one to regulate wire feed.

The last weld, D looks good!
Try to listen to the sound of the "weld flame", it should sound almost like the sound you hear when you are frying pork. An intense popping sound. If you have a long period between each "pop" you have either too low current or too high wire feed (or a combination of both). If you do not hear any "popping" sound but more like a "hissing" sound you have too high current for your set wire feed. Increase the wire feed or lower the current.
As with a stick welding machine, you can also adjust heat input by changing the angle of the welding handle towards the weld. But I suppose you are very familiar with that since you have been using a stick welder before.
Good luck!!

Daniel
Yes - the welder has the 2 dials - wire feed and the current. On weld D, it did sound like intense frying - a rhythmic popping sound. The first - A - was occasional pops with the wire pushing the handle away.

Thanks all, I know I am heading down the right path. Now I need to practice and listen!!!

John
Reply With Quote
  #6  
Old 10-11-2012, 03:48 AM
Ralphy Ralphy is offline
United States | Addict
 
Join Date: Dec 2009
Posts: 538
My Photos: (22)
Default

It's been years, but when in high school I part time welded Vega motor mounts. Eight beads on a U shaped V gusset. I welded so many of the damn things I tried welding a few with my eyes closed. They came out OK! LOL! Now that I think about it, the sound was probably my guide. Something around 70 pieces an hour. Made like $2.85 an hour.

Ralphy

Last edited by Ralphy; 10-11-2012 at 03:51 AM..
Reply With Quote
  #7  
Old 10-11-2012, 04:28 AM
SuperBuickGuy's Avatar
SuperBuickGuy SuperBuickGuy is offline
United States | Addict
 
Join Date: Jul 2012
Location: Seattle, WA
Posts: 2,072
My Photos: (0)
Default

harumph.... photo doesn't show on my end.
Reply With Quote
  #8  
Old 10-13-2012, 12:31 AM
TimAT's Avatar
TimAT TimAT is offline
United States | Addict
Cruise-In Bird-Run 1 Veteran
 
Join Date: Mar 2008
Location: Gladstone, Missouri
Posts: 1,989
My Photos: (60)
Default

IF it sounds like frying bacon it's about right. May have very little penetration, but the bead will be nice. How fast you move the gun will vary the depth of the weld.
I've got a Miller 250 that works like a champ. Usually takes me about 15-20 minutes to learn how to weld again, not doing it all the time.
__________________
Why is it that all instruments searching for intelligent life are pointed away from the Earth?
Reply With Quote
  #9  
Old 10-13-2012, 11:56 AM
fastcompany2 fastcompany2 is offline
United States | Member
 
Join Date: Sep 2012
Posts: 32
My Photos: (0)
Default

ya everyone is getting you on the right track with how it is supposed to sound but do not butt 2 pieces together and just weld them. a piece of 1/8" should be gapped somewhere around 3/32" your weld on top should almost be flat but it should slighly higher than the material. and the bleed through on the other side should not look like the top it should have a line where the weld ran down through the gap and past the material around 1/16". if it runs further or the weld looks the same on both sides your running your machine to hot. and on a side note about your welder you should really only use a 220volt machine. don't care what anyone else says unless your welding autobody sheet metal 110volt welders wont do it.
Reply With Quote
  #10  
Old 10-15-2012, 12:38 PM
Ralphy Ralphy is offline
United States | Addict
 
Join Date: Dec 2009
Posts: 538
My Photos: (22)
Default

TimAT said, "Why is it that all instruments searching for intelligent life are pointed away from the Earth?"

Evidently they have been looking for Felix Baumgartner.



Just awesome! By the way, the man talking Felix thru the jump is Joe Kittinger, the previous American record holder.

Sorry for the highjack!

[Only registered and activated users can see links. Click Here To Register...]

Ralphy

Last edited by Ralphy; 10-15-2012 at 12:43 PM..
Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 02:03 PM.
 


Design by: vBulletin Skins Zone
Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.