Original Posted By: "rpound"
I've been playing around welding some scrap pieces and decided to make somethingfor my son. I learned that when you get the inner cone of the flame too closeto the puddle... POP!!! The puddle then comes down on you like 4th of Julyfireworks. My problem is that it seems like the 1/16th R45 welding rod I'm usingdoesn't quickly melt in the puddle. I've had to go over the welds again becausethey look "slaggy" and without the rod to worry about on the second passI can watch everything smooth out into the puddle as I work it from one sideto the other. I've been trying to get a good size puddle going to ensure penetrationand it looks fair when I'm done. The problem is the welds don't seemthat strong. Actually, brittle is the word I would use. Any idea what I couldbe doing wrong?? Using Harris Aviator torch with 1/16th square tubing and1/8 x 1/2 strap. Welding the strap to the different size tubing doesn't seemto be that hard, but then again, my welds aren't that strong. As a beginner youcan see progress pretty quickly. Just wish I could get the strength I alwaysassociated with welding.Thanks in advance!--------Glenn ThomasN?????http://www.flyingwood.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Pietenpol-List: Welding Headache
RE: Pietenpol-List: Another Pesky
Original Posted By: lshutks(at)webtv.net (Leon Stefan)
Thanks for the help guys. I am 6'0" tall 245 lbs so I guess I would fit inthe "Widebody" category. It appears that MT weights vary considerably. Wouldeveryone agree that in general at least, the tube and fabric models arelighter? I saw the Piet at the Rotec display in Oshkosh that was all wood itwas beautiful but I guess it doesn't matter how beautiful she is if shecan't drag my oversize carcass of the ground without incurring a hernia orworse.Is 1200 lbs the actual max gross? Is that with a different design or beefedup in some manner or am I just misinformed about the 1060 lb gross? If thatis possible that would be great, at 1200 lb max even with a 700 lb MT thatleaves .....uhhh....(calculating sounds)......uhhhh..... about 500 lbsuseful AWESOME!! As in the words of that song "I believe I can fly" That shore would hep from making a misstep that could haunt a man foreverlike Rick boy! You know when you say it you done messed up but is shore is aheap lot easier to let the ole cat out of the bag then hit is to put em backin! Can I get a witness!Thanks, Rusted________________________________________________________________________________
Thanks for the help guys. I am 6'0" tall 245 lbs so I guess I would fit inthe "Widebody" category. It appears that MT weights vary considerably. Wouldeveryone agree that in general at least, the tube and fabric models arelighter? I saw the Piet at the Rotec display in Oshkosh that was all wood itwas beautiful but I guess it doesn't matter how beautiful she is if shecan't drag my oversize carcass of the ground without incurring a hernia orworse.Is 1200 lbs the actual max gross? Is that with a different design or beefedup in some manner or am I just misinformed about the 1060 lb gross? If thatis possible that would be great, at 1200 lb max even with a 700 lb MT thatleaves .....uhhh....(calculating sounds)......uhhhh..... about 500 lbsuseful AWESOME!! As in the words of that song "I believe I can fly" That shore would hep from making a misstep that could haunt a man foreverlike Rick boy! You know when you say it you done messed up but is shore is aheap lot easier to let the ole cat out of the bag then hit is to put em backin! Can I get a witness!Thanks, Rusted________________________________________________________________________________
Re: Pietenpol-List: Welding Headache
Original Posted By: Jim Ash
Subject: Re: Pietenpol-List: Welding HeadacheI had the exploding puddle problem too. Some one on the list suggestedthat I am using too small a tip, The smaller tip was getting too hotcausing the gas to ignite inside the tip and blasting the puddle away. Iwent to the next size larger tip, which stayed cooler. It helped abunch. Leon S.________________________________________________________________________________Date: Sun, 2 Sep 2007 01:26:16 -0400 (GMT-04:00)
Subject: Re: Pietenpol-List: Welding HeadacheI had the exploding puddle problem too. Some one on the list suggestedthat I am using too small a tip, The smaller tip was getting too hotcausing the gas to ignite inside the tip and blasting the puddle away. Iwent to the next size larger tip, which stayed cooler. It helped abunch. Leon S.________________________________________________________________________________Date: Sun, 2 Sep 2007 01:26:16 -0400 (GMT-04:00)
> Re: Pietenpol-List: Welding Headache
Original Posted By: Jim Ash
> Pietenpol-List: Welding Headache
Original Posted By: "walt evans"
Pietenpol-List: Re: Welding Headache
Original Posted By: "walt evans"
Thanks guys. I'm using my largest tip right now (Harris #2). Using R45 whichis mild steel filler rod same thickness as the smallest piece I'm welding. I'mgoing to try going up to 10lbs Oxygen and 10 lbs Acet. I've been keeping itset at 7lbs. I'll pick up the next larger tip and see if that helps. It maybe just a matter of getting enough practice. Thanks for coming back with somegood suggestions so quickly. Heading out to finish the current project right now.--------Glenn ThomasN?????http://www.flyingwood.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 02 Sep 2007 09:47:36 -0400
Thanks guys. I'm using my largest tip right now (Harris #2). Using R45 whichis mild steel filler rod same thickness as the smallest piece I'm welding. I'mgoing to try going up to 10lbs Oxygen and 10 lbs Acet. I've been keeping itset at 7lbs. I'll pick up the next larger tip and see if that helps. It maybe just a matter of getting enough practice. Thanks for coming back with somegood suggestions so quickly. Heading out to finish the current project right now.--------Glenn ThomasN?????http://www.flyingwood.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 02 Sep 2007 09:47:36 -0400
Re: Pietenpol-List: Welding Headache
Original Posted By: Ben Charvet
Subject: Re: Pietenpol-List: Welding HeadacheI found that too much OX will cause the pop you are talking about. Watch the flame tip as you add OX to the mix. You bring the flame down to the single diamond, then back off the OX so that there is some flame past the diamond at the tip. To much ox will cause the metal to burn (pop) to much fuel will causesoot to form on the surface.Howdyhttp://discover.aol.com/memed/aolcom30tour________________________________________________________________________________Date: Sun, 02 Sep 2007 12:08:12 -0400
Subject: Re: Pietenpol-List: Welding HeadacheI found that too much OX will cause the pop you are talking about. Watch the flame tip as you add OX to the mix. You bring the flame down to the single diamond, then back off the OX so that there is some flame past the diamond at the tip. To much ox will cause the metal to burn (pop) to much fuel will causesoot to form on the surface.Howdyhttp://discover.aol.com/memed/aolcom30tour________________________________________________________________________________Date: Sun, 02 Sep 2007 12:08:12 -0400
Re: Pietenpol-List: Re: Welding Headache
Original Posted By: Tim Willis
Re: Pietenpol-List: Re: Welding Headache
Original Posted By: "Jim Ash"
Lots of years ago I spent an entire week at Osh doing the composites workshop and had time to hangout with the volunteer instructors at the welding workshop. If memory serves me, they insisted the flame had to be slightly rich in fuel and lite on the oxygen. The flame was adjusted just down to the diamond blue tip and then backed off on the oxygen to make a "carbon rich flame". Reason- the excess oxygen in the flame would burn out the 0.30 % (I think, that's what the 30 stands for in 4130) carbon thats in 4130 steel, leaving a weaker weld. If the flame is oxygen rich the carbon burning up in the steel making CO2 gas will make the weld pop and bubble up.Gordon----- Original Message -----
Lots of years ago I spent an entire week at Osh doing the composites workshop and had time to hangout with the volunteer instructors at the welding workshop. If memory serves me, they insisted the flame had to be slightly rich in fuel and lite on the oxygen. The flame was adjusted just down to the diamond blue tip and then backed off on the oxygen to make a "carbon rich flame". Reason- the excess oxygen in the flame would burn out the 0.30 % (I think, that's what the 30 stands for in 4130) carbon thats in 4130 steel, leaving a weaker weld. If the flame is oxygen rich the carbon burning up in the steel making CO2 gas will make the weld pop and bubble up.Gordon----- Original Message -----
>> Re: Pietenpol-List: Re: Welding Headache
Original Posted By: "KMHeide, BA, CPO, FAAOP"
Re: Pietenpol-List: Re: Welding Headache
Original Posted By: shad bell
Pietenpol-List: Re: Welding Headache
Original Posted By: "KMHeide, BA, CPO, FAAOP"
This list is the best! Where else could you throw out a question to the worldbefore bed and wake up almost expecting some kind of help. I took Dan Wilson'sadvice. With regulators at 7 lbs. I opened the acetylene wide open, then openedthe oxygen wide open and backed down the pressure at the oxy regulator tillI saw a nice neutral flame. Cone was clear and a little larger than I'd beenseeing before and made nice puddles with no popping and able to weld straightthrough in one pass. I think with #2 tip it was a little too much heat soI'm going to take Walt's advice and go back down to the #0 tip. Thanks to everyone,I really enjoyed reading each suggestion and the remaining welds show thatthe advice from this list is fantastic.--------Glenn ThomasN?????http://www.flyingwood.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 2 Sep 2007 19:25:16 -0700 (PDT)
This list is the best! Where else could you throw out a question to the worldbefore bed and wake up almost expecting some kind of help. I took Dan Wilson'sadvice. With regulators at 7 lbs. I opened the acetylene wide open, then openedthe oxygen wide open and backed down the pressure at the oxy regulator tillI saw a nice neutral flame. Cone was clear and a little larger than I'd beenseeing before and made nice puddles with no popping and able to weld straightthrough in one pass. I think with #2 tip it was a little too much heat soI'm going to take Walt's advice and go back down to the #0 tip. Thanks to everyone,I really enjoyed reading each suggestion and the remaining welds show thatthe advice from this list is fantastic.--------Glenn ThomasN?????http://www.flyingwood.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 2 Sep 2007 19:25:16 -0700 (PDT)
>>> Re: Pietenpol-List: Re: Welding Headache
Original Posted By: Jeff Boatright