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Jon and V Boat Conversions & Modifications
Rivet to welded coversion?
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<blockquote data-quote="bassboy1" data-source="post: 373680" data-attributes="member: 55"><p>Stick with the rivets.</p><p></p><p>The problem you are going to run into is distortion. Even the thickest 'off the shelf' riveted tinnies are thinner than the thinnest 'off the shelf' welded hulls. The difference between a .063-.070 thick hull, and a .090-.100 thick hull is drastic. You wouldn't think that .020-.030 will make much of a difference, but it most definitely does when it comes to controlling distortion. Each weld is going to pull just a little bit, and the cumulative effect of that will make a mess when it comes to all the welds on 2 or 3 ribs.</p><p></p><p>TIG welding that is going to dramatically increase the problem. If one were to attempt that, it is most definitely a job for pulsed MIG, not TIG. You should note that the welds in your photo are MIG (though poorly done), and it's hard to say for sure, but one appears to have already cracked in the heat affected zone, which is highly likely using that joint design (lap joint on structurally unnecessary flange) on that alloy of material (extrusion, giving it an extremely high likelihood of being 6061 or similar).</p></blockquote><p></p>
[QUOTE="bassboy1, post: 373680, member: 55"] Stick with the rivets. The problem you are going to run into is distortion. Even the thickest 'off the shelf' riveted tinnies are thinner than the thinnest 'off the shelf' welded hulls. The difference between a .063-.070 thick hull, and a .090-.100 thick hull is drastic. You wouldn't think that .020-.030 will make much of a difference, but it most definitely does when it comes to controlling distortion. Each weld is going to pull just a little bit, and the cumulative effect of that will make a mess when it comes to all the welds on 2 or 3 ribs. TIG welding that is going to dramatically increase the problem. If one were to attempt that, it is most definitely a job for pulsed MIG, not TIG. You should note that the welds in your photo are MIG (though poorly done), and it's hard to say for sure, but one appears to have already cracked in the heat affected zone, which is highly likely using that joint design (lap joint on structurally unnecessary flange) on that alloy of material (extrusion, giving it an extremely high likelihood of being 6061 or similar). [/QUOTE]
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Jon and V Boat Conversions & Modifications
Rivet to welded coversion?
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