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by Kevin Morin
Wed Aug 08, 2018 12:13 pm
Forum: Metal
Topic: Notes on Metal Boat Building Methods
Replies: 81
Views: 66916

Re: Notes on Metal Boat Building Methods

mayloga, the sheet metal module in Fusion does, I seem to recall(?), have an unfolding routine used to get ducting and sheet metal parts flattened for cutting and future pressing into the 3D shape drawn? usually ducting is made of rectangular panels- but- I was suggesting, to get an unfold feature, ...
by Kevin Morin
Tue Aug 07, 2018 9:19 am
Forum: Metal
Topic: Notes on Metal Boat Building Methods
Replies: 81
Views: 66916

Re: Notes on Metal Boat Building Methods

Logan, Fusion 360 doesn't have a 'developed surface' feature yet. However in the Sheet Metal module/tools there is a sort of unwrap that might give a "segmented unwrap" - but not clean B-Spline or T-Splines. So it is very possible (don't know Fusion 360 well enough to say) that you could create a la...
by Kevin Morin
Sun Aug 05, 2018 3:46 pm
Forum: Metal
Topic: Aluminum Boat Cabins
Replies: 39
Views: 36346

Re: Aluminum Boat Cabins

Yofish, that standing seam roofing take off solves some really big shape and forming issues for skiff (and larger boats') cabin tops that I hadn't "seen" until re-reading this thread. One of the shapes that is most attractive on a skiff cabin - regardless of size- is the "whale back" - or compound c...
by Kevin Morin
Sun Aug 05, 2018 2:06 pm
Forum: Metal
Topic: So, You want to buy a welding machine...?
Replies: 61
Views: 71041

Re: So, You want to buy a welding machine...?

Eenarl, welcome to the Glen-L Forum and the metal category of threads. Here's my take on your post about learning stick welding as the building block or foundation of welding skills. Unless a reader is planning to build a steel boat- there is almost no gain to learning to stick weld since the new we...
by Kevin Morin
Tue Jul 31, 2018 12:00 am
Forum: Metal
Topic: So, You want to buy a welding machine...?
Replies: 61
Views: 71041

Re: So, You want to buy a welding machine...?

Yofish, thanks for the post. (the readers don't know enough of what you do; because you haven't done a build thread here!) If I can generalize? ( and I usually do in reply to your posts) you can recommend Everlast power supplies for building welded aluminum boats, AND .... from personal experience (...
by Kevin Morin
Mon Jul 30, 2018 10:01 am
Forum: Metal
Topic: Aluminum Boat Cabins
Replies: 39
Views: 36346

Re: Aluminum Boat Cabins

North, the description is a little vague so my reply may not address the cabin ideas you pose? Depending on the size of pipe, four corner posts (like legs of a table?) will support a top. 1" pipe would be a bit thin but 3" would be way overkill. The lengths versus the diameter determine the slendern...
by Kevin Morin
Sun Jul 29, 2018 2:07 pm
Forum: Metal
Topic: Metal Marine Tanks (mainly welded aluminum)
Replies: 78
Views: 64027

Re: Metal Marine Tanks (mainly welded aluminum)

Water in a marine tank is a fact of life; water in fuel from the gas dock may not be as common as it was, but a tank vent allows the gases atop the fuel to expand out the vent ports but.... more importantly when the tank cools with the setting sun; outside atmosphere is allowed into the tank via the...
by Kevin Morin
Sun Jul 29, 2018 11:01 am
Forum: Metal
Topic: Metal Marine Tanks (mainly welded aluminum)
Replies: 78
Views: 64027

Re: Metal Marine Tanks (mainly welded aluminum)

After posting the last set of images, I realized that some were 'worse for the wear' of "photo handling" on my part. The result of my questionable photography skills, coupled with the camera in an iphone6 and edited down from the huge file size to a cropped 800pixels max on one side image; has lead ...
by Kevin Morin
Sat Jul 28, 2018 6:15 pm
Forum: Metal
Topic: Metal Marine Tanks (mainly welded aluminum)
Replies: 78
Views: 64027

Re: Metal Marine Tanks (mainly welded aluminum)

I've bumped this thread for several reasons. One, I'm building again and that has involved a tank; two I'd prefer to use photos (regardless of the poor quality of my "shades of gray" metal images) over my sketches and illustrations as ways to show a workable method of fabrication; and three, many of...
by Kevin Morin
Tue Jul 24, 2018 9:06 pm
Forum: Metal
Topic: Metal Marine Tanks (mainly welded aluminum)
Replies: 78
Views: 64027

Re: Metal Marine Tanks (mainly welded aluminum)

In previous posts we also discussed "key hole" welds where the weld hold two pieces together but they are stacked; on piece on the other. To weld this orientation of sheet/plate a hole is cut in the upper sheet and the weld fuses to the lower metal surface and to the sides of the upper sheet along t...
by Kevin Morin
Tue Jul 24, 2018 8:30 pm
Forum: Metal
Topic: Metal Marine Tanks (mainly welded aluminum)
Replies: 78
Views: 64027

Re: Metal Marine Tanks (mainly welded aluminum)

As part of explaining tank building we’ve looked at some pretty refined details regarding welding and welding preparations. The primary reason to be very detailed in the explanations are that a Forum reader may choose to build a tank- but not to do the welding of the tank? Aluminum welding is an exp...
by Kevin Morin
Fri Jul 20, 2018 12:43 pm
Forum: Metal
Topic: Metal Marine Tanks (mainly welded aluminum)
Replies: 78
Views: 64027

Re: Metal Marine Tanks (mainly welded aluminum)

The last few posts show some images of bending failures- pictures of aluminum that was pressed to a "too tight" radius inside - and the resulting tearing/cracking/crazing of the outside of the material because the alloy's mechanical properties COMBINED with the tooling shapes and geometry induced to...
by Kevin Morin
Wed Jul 11, 2018 9:57 am
Forum: Metal
Topic: Power Tool Review
Replies: 8
Views: 7419

Re: Power Tool Review

This post reviews a Widow Maker/Meat Axe/"aluminum grinder w saw blades" which is very safe to use even though it looks wickedly dangerous. Before we look more at this tool let's make clear: #1 THIS post is not advocating you build, use or employ this tool modifications. #2 Glen-L Marine, Forum and ...
by Kevin Morin
Sat Jul 07, 2018 11:21 pm
Forum: Metal
Topic: Metal Marine Tanks (mainly welded aluminum)
Replies: 78
Views: 64027

Re: Metal Marine Tanks (mainly welded aluminum)

Just above I posted some images of the strain or stress tearing of sheet aluminum when the bending dies are not correctly sized for alloy and thickness. This is another image of the same reminder; strain crack_2.jpg here the material failure can be seen very dramatically! Imagine your tank being ben...
by Kevin Morin
Sat Jul 07, 2018 11:14 pm
Forum: Metal
Topic: Metal Marine Tanks (mainly welded aluminum)
Replies: 78
Views: 64027

Re: Metal Marine Tanks (mainly welded aluminum)

During our discussion of making welded aluminum tanks for your own boat; I've referred several times to making use of a press brake to form bends in the sheet material- potentially eliminating a weld and if you're hiring the welding (?) the bend could be less expensive than welding? The cautions I'd...

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