#21
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Thank you for showing how you go about it.
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Marcus aka. Gojeep Victoria, Australia http://willyshotrod.com Invention is a combination of brains and materials. The more brains you use, the less materials you need. |
#22
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Finish work - "metal finishing"
Thank you Marcus and John.
The surface is decent but needs some fine-tuning. So, by using a file along with a spoon and "dolly" this surface should come around nicely. P1020002 copy.jpg I use my custom-bent Super Shear to check file the surface. This levels weld high spots and "checks" the surface, showing me the low spots where the file does not cut. P1020006 copy.jpg Here is the spring steel spoon striking a sheet of .050 5052, which is supported by my "dolly" - the marlin spike. The round dots show me where I am striking. P1020021 copy.jpg Here is the technique being used on the panel. remember that I am lifting up with the dolly as I strike down with the spoon. Inertia works with me to lift up the low spots. The dots are my accuracy indicators. P1020024 copy.jpg I check file again. Each filing removes only .001-.002" if done correctly. When I teach this in workshops I show the thickness measuring along the way. P1020025 copy.jpg Full view of the patch after metal finishing. Remember that this is paint-grade so I am not doing a super nitpick along the weld seam. Prime/sand coats will level it up nicely. Again, the patch center is untouched, and my work is only concentrated along the HAZ. I learned long ago to be economical with my efforts. And - why overwork the panel? Overworking always leads to oilcans. P1020029 copy.jpg A light sanding with 320 grit evens up the scratches. Total thickness loss is .003 to .004" - no big deal when the panel is tight - and when the painter does not sand more. (I had an Aston DB7 job last summer that turned out nicely - but the silly inexperienced owner went against my specific enumerated instructions, and sanded away to his heart's content .... and now his doors must be re-skinned. -- No longer my job, sorry. ) Next up: the delicate complicated details.
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. Last edited by crystallographic; 02-18-2019 at 12:57 PM. |
#23
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i love learning from the Master - top work Kent!
Cheers Charlie
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Why does dust stick to everything, but nothing sticks to dust? |
#24
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Quote:
Thank you Charlie.
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#25
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Good stuff Kent. Thanks for posting the how to.
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Kerry Pinkerton |
#26
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Thanks Kerry.
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#27
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I like the bent file. Allows you to get into small areas. But it would hurt to take a torch to one of those files.
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Scott in Montreal |
#28
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Quote:
... I never felt a thing ... (except successful) ...
__________________
Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#29
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Details, details ...
P1010274 copy.jpg
This was a fun little patch. I ordered up some flare dies for this size opening, and cut and hole-sawed out the opening from some appropriate flat stock and then flared it. (Easier than trying to shape the little piece.) Then I cut out the section I needed, trimmed it to fit, and began welding it in. P1010275 copy.jpg Since this is 5052 (likes to back-crack) the welding sequence is non-trivial. Here I have numbered the welds in the sequence they were made. - You already knew this sequence, though - right? P1010301 copy.jpg I also weld the back side in the same sequence, otherwise the cracks start obediently following your efforts. P1020037 copy.jpg Next up was the center hole up top, for the clock. I ordered up a correct punch/flange die set and then made up the patch. Witness mark is vital to "clocking in" a round patch, unless chasing one's tail is a fun thing. P1020053 copy.jpg Sequence is not really important for welding this patch, although I always try to balance the tension across the patch as I weld, to limit unnecessary distortion. Here, the back side is welded nice and flat. P1020070 copy.jpg Panel is all finished, with the clock opening all nicely punched and flared, and with some repair areas lightly sanded with 320. P1020062 copy.jpg P1020067 copy.jpg Nice even tidy job, ready for paint. (The final count was 19 holes and cracks to be repaired.) -end-
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. Last edited by crystallographic; 02-22-2019 at 03:59 PM. |
#30
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That's a nice looking panel. Thanks for showing us your methods!
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Kevin B |
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