#41
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Hi Mitch,
Did Geoff weld horizontally or vertically when you were watching him?
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Cheers Martin No matter how clever you think you are, stupidity is always one step ahead!!!! |
#42
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Crickey Martin, that's testing the old memory, I think it was just horizontal. Can I ask why?
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Mitch |
#43
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Quote:
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Scott in Montreal |
#44
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Hi Mitch,
I've met coacbuilders that don't use filler rod and they've told me that they weld vertically from top to bottom. It makes sense as the molten pool wants to fall away, so welding vertically would be an advantage as the metal would be flowing into the joint. Welding horizontally with filler rod takes skill, the filler rod is doing 2 things, filling the joint and cooling the weld area, so reducing the opportunity for the metal to fall out, that's the penetration and surface build up that has to be worked on, hence creating work. If you ain't adding filler rod, this means you have less metal finishing and you can wheel the weld area to blend the panels together, quicker than filing and planishing, the downside is more risk of a joint failure, unless you get it spot on. Obviously Geoff has got this sussed what ever way he welds.
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Cheers Martin No matter how clever you think you are, stupidity is always one step ahead!!!! |
#45
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Pretty sure he used a slither of the Ali as filler rod. Here I was thinking I paid attention.
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Mitch |
#46
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Sometimes you have a filler rod ready, just in case it needs a little, this applies to steel and ali. I did the course a Contour Autocraft, altough they used tig with great results, no joint failure, they do run up the backside with the Ali to be sure. I think most people agree less filler rod the better. I must do a few samples and show them.
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Cheers Martin No matter how clever you think you are, stupidity is always one step ahead!!!! |
#47
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Chinese wheeling
Can someone explain, it's not a turn Iv'e heard before ?
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Tom Poulter Follow the Dream - Sideways - - But don't fall-off the edge 'good to know you guys care' https://ctrestorations.com/ |
#48
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Chinese wheeling.
I understand that it's a term for turning your panel upside down and wheeling it inverted.
Concerning welding one important point that Geoff made was this. I have in fact read it elsewhere on this forum. He explained that it's important to wheel panels so that they naturally assume a shape and are not "stressed" ie being held in a certain postion. Geoff explained that if panels are stressed welding will increase their chances of distorting.
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Paul |
#49
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there are 5 video's of geoff making a lotus panel on the wheel-including 'chinese' wheeling.search youtube.title is 'how to english wheel a complex curve'
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Ferguson |
#50
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The lotus panel with return in the videos Bill Longyard took explain the wheeling upside down. When the return is massaged in some downward pressure is needed in the opposit direction. The flat upper needs to be at the underside at that point since you'r making a return.
The shape in shape out excersize and making the return are the basics you need according to Geoff. These are all the shapes that can be found in a vintage car. Hand manipulating the panel between wheelings is the most important thing I learned. Quoting Geoff 'the sides are where the shape is'. Keep manipulating the sides into the shape they need to go in. This way there's a natural force to the material being wheeled in my humble opinion. It changed the way I work on the wheel. Geoff welds with a nr 5 (if I remember right) that produces a big but very soft flame that lacks the force to blow out the puddle too quickly. And then you just 'scoot' along. Grt Frank
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Frank de Kleuver |
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