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I am a student in a community college welding program. I am having problem welding 7018 uphill, the weld drips. I am using a1/8 rod at 120amps on a Miller XMT 350 cc/cv. My welds are fine up to about a 65 degree up angle but when I hit 90 degrees the weld pool drips metal. My travel speed is moderate with no undercut and I use a side to side motion with a slight pause at each side ( not doing a wide weave) and a 15 degree rod up angle in my stinger.Any suggestions you can offer to correct this problem will be greatly appreciated.Thank you very much.
Reply:
Originally Posted by fogbank
I am a student in a community college welding program. I am having problem welding 7018 uphill, the weld drips. I am using a1/8 rod at 120amps on a Miller XMT 350 cc/cv. My welds are fine up to about a 65 degree up angle but when I hit 90 degrees the weld pool drips metal. My travel speed is moderate with no undercut and I use a side to side motion with a slight pause at each side ( not doing a wide weave) and a 15 degree rod up angle in my stinger.Any suggestions you can offer to correct this problem will be greatly appreciated.Thank you very much.
Reply:
Originally Posted by fogbank
I am a student in a community college welding program. I am having problem welding 7018 uphill, the weld drips. I am using a1/8 rod at 120amps on a Miller XMT 350 cc/cv. My welds are fine up to about a 65 degree up angle but when I hit 90 degrees the weld pool drips metal. My travel speed is moderate with no undercut and I use a side to side motion with a slight pause at each side ( not doing a wide weave) and a 15 degree rod up angle in my stinger.Any suggestions you can offer to correct this problem will be greatly appreciated.Thank you very much.
Reply:Thank you for the suggestion, however it is metal dripping not slag. Slag collects in the bottom of the puddle when going uphill and doesn't drip for me. I always clean my welds with a wire wheel. Appreciate your suggestion.
Reply:Keep the arc length very short. If needed, drop the amps down to around 95-105. If that doesn't still work, the it could simply be too much heat for the test piece.
1st on WeldingWeb to have a scrolling sig!
Reply:
Originally Posted by 52 Ford
Watch this.Sent from my Lincoln Buzzbox using Tapatalk
Reply:
Originally Posted by scsmith42
That's a good video and worth watching.
Reply:It might be outgassing I guess but the edghes simply dont flow and wet as well against dirty steel. You can see little undercut nicks along this especially with weave that are caused/aided anyway by scale making it more work.
Attached Images
www.urkafarms.com
Reply:Might be worth noting as in the pic that while the plate is vert the puddle really isnt. I dont watch Jody much but he is probably as good as it gets and a couple I saw running overhead plates it was obvious this is a guy been there and dun it.www.urkafarms.com
Reply:
Originally Posted by N2 Welding
I like how he pointed out the undercut likely caused by the offgassing of the millscale that he did not grind off the plate
Reply:
Originally Posted by 52 Ford
Jodie at Welding Tips and Tricks always has some good info in his videos. Always seems to have some interesting stuff to learnt you
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Reply:
Originally Posted by NotaVegetarian
Have been watching these videos. Im laid up at the moment with this back.
Reply:Mr. F. BankDo you have some photos of your dripping? Asking for a friend. A 1000 words........
Reply:
Originally Posted by Oscar
Keep the arc length very short. If needed, drop the amps down to around 95-105. If that doesn't still work, the it could simply be too much heat for the test piece.
Reply:Watch the arc force (dig?) knob on the XMT, it will just keep pushing amps into the rod if you have it turned up too far, so no good for uphill. Here's you trying to keep a short arc length, and here's the machine trying to boost the amps and you end up with a hot runny mess.I'd turn arc force down to say 25-30% and amps to 110, maybe 105, for 1/8". It's been a while since I used an XMT for stick, more recently using a lunchbox welder at 105 amps for uphill and it loved it.IIRC the XMT with a bit of dig on it will burn a 7018 as hard as you can push it into the joint... was almost impossible to snuff the arc out or short circuit it.Last edited by Munkul; 1 Week Ago at 07:07 AM.Murphy's Golden Rule: Whoever has the gold, makes the rules.
Reply:
Originally Posted by 52 Ford
I literally just sat down to give my lower back a break. Splitting logs into rails for a split rail fence. 12lb sledge, a maul, and wedges. Sent from my Lincoln Buzzbox using Tapatalk
Reply:I solved my drip problem. I was pushing the the rod too far into the puddle (short arc to the extreme) and the 3/8" plate could not handle the heat thus the metal dripped out. Now I focus on my arc length and make certain I establish a good puddle before I start moving up the plate. All is good now.Thank you all for your suggestions, they are greatly appreciated.PS: My settings are 109 amps, 25% arc force (Dig) and approximately15% uphill tilt on my rod.Last edited by fogbank; 6 Days Ago at 12:24 AM.
Reply:
Originally Posted by fogbank
I solved my drip problem. I was pushing the the rod too far into the puddle (short arc to the extreme) and the 3/8" plate could not handle the heat thus the metal dripped out. Now I focus on my arc length and make certain I establish a good puddle before I start moving up the plate. All is good now.Thank you all for your suggestions, they are greatly appreciated.PS: My settings are 109 amps, 25% arc force (Dig) and approximately15% uphill tilt on my rod.
Reply:Thank you for your recommendation.
Reply:
Originally Posted by 52 Ford
Watch this.Sent from my Lincoln Buzzbox using Tapatalk
Reply:
Originally Posted by solvepassel
I had the same problem, and even my master couldn't say what was wrong. I'm happy to become a part of this community. As a student, I have many challenges during my studying, and such forums and websites help me to keep studying without burnout. Thank you for sharing it! |
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发表于 2022-5-19 11:02:17