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> BUILD-OFF CHALLENGE: Tygaboy's '75 LS3, It seemed a good idea at the time...
tygaboy
post Mar 18 2018, 10:18 PM
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Did I say "tedious"?

Forgive the horrific-ness of this little part. I an no where near skilled / experienced enough to be able to apply the "measure twice, cut once" approach to this part of the project.

Instead, I make a little practice part to learn how all these angles and corners need to come together. It's all about learning for the next little while. But I think you get the idea of what I'm after. I'm pretty confident I will achieve a good fit and I think it'll look pretty good.

That said, "practice" translates to "wasted material".

Just perfect timing for a steel tariff! (IMG:style_emoticons/default/shades.gif)


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live free & drive
post Mar 19 2018, 10:52 AM
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Great work!

I don't know if you've ever seen the rapid sheet-metal prototyping machines, video below:

https://youtu.be/Wl5_wUVxRvw
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tygaboy
post Mar 19 2018, 12:42 PM
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QUOTE(live free & drive @ Mar 19 2018, 09:52 AM) *

Great work!

I don't know if you've ever seen the rapid sheet-metal prototyping machines, video below:

https://youtu.be/Wl5_wUVxRvw


Thanks, very cool! I haven't seen that before...
It seems a bit like flow forming. I'm about to give that a try.

Essentially, you use an air hammer/rivet gun with a soft-ish head and (carefully!) drive the metal into a form. The form can be made of wood.

It opens a lot of doors as it's not silly expensive to get started.
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bbrock
post Mar 19 2018, 12:47 PM
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QUOTE(tygaboy @ Mar 19 2018, 12:42 PM) *

QUOTE(live free & drive @ Mar 19 2018, 09:52 AM) *

Great work!

I don't know if you've ever seen the rapid sheet-metal prototyping machines, video below:

https://youtu.be/Wl5_wUVxRvw


Thanks, very cool! I haven't seen that before...
It seems a bit like flow forming. I'm about to give that a try.

Essentially, you use an air hammer/rivet gun with a soft-ish head and (carefully!) drive the metal into a form. The form can be made of wood.

It opens a lot of doors as it's not silly expensive to get started.


Can't wait to see what you produce with the flow forming. I have a project I hope to tackle sometime this summer that I was going to try that on. Looking forward to hearing/seeing you experience with it.
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tygaboy
post Mar 21 2018, 09:03 AM
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For all the other tool geeks/whores, here's more of the bender in action:
rolling the radius farther around

I'm fortunate to have some pretty cool tools and it really drives home the fact that all these things really do is speed up the process of making the part... or totally screwing up the part and wasting material!

I have a long way to go and lots to learn...


https://www.youtube.com/watch?v=DGyqrkp1RLo
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914forme
post Mar 21 2018, 12:27 PM
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(IMG:style_emoticons/default/agree.gif) That Magnabrake is on a very long list of items I would love to have in my shop.
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Mueller
post Mar 21 2018, 10:38 PM
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I have an oxy/acet rig with Meco torch that you are free to borrow to weld on those flares.

I don't have real truck so you'd have to pick up , I'll provide entertainment with a tour of poorly put together and disorganized shop (IMG:style_emoticons/default/smile.gif)

https://www.tinmantech.com/products/welding...ch-accessories/
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tygaboy
post Mar 24 2018, 02:50 PM
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Working on the final upper portion of the fire wall that lives under the cross bar.

Learning, learning... When making multiple folds that need to intersect at a particular angle, I need to plan better. I didn't know exactly what the angle needed to be so I had to, um.... improvise! Yes, let's go with that.

Hammer and dolly = improvise (IMG:style_emoticons/default/idea.gif)

Fortunately, it turned out OK. Still needs to be trimmed to final dimensions so that little bit of overlap at the corner isn't an issue. Plus, I'll weld it up, too.


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tygaboy
post Mar 24 2018, 02:59 PM
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Essentially impossible to see but I need this piece to tilt down a bit. That's to allow clearance for the cross bar to be fitted ahead of final welding.

You wouldn't know it but since the door bars angle down as they leave the fire wall, the cross bar needs to slide up and in as it's being installed.
Super happy I accounted for this before final welding the part I'm working on!

Anyway, what's the big deal about this piece needing to tilt down?

As a flat plane tilts away from a curve, like this piece does with that reinforcement arch I added to the fire wall, it creates a gap at the front of the curve.

So I used the English wheel to raise up a bit of a hump to close that gap. Again, no one will ever see it but it makes all the difference in terms of fitment.


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tygaboy
post Mar 24 2018, 03:00 PM
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Line 'em up! (IMG:style_emoticons/default/welder.gif)


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tygaboy
post Mar 24 2018, 06:25 PM
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Back to the compound curve I needed to put into the upper piece. It didn't take much but I was able to get a really nice fit.
Arch at the back, flat across the front. (IMG:style_emoticons/default/shades.gif)


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tygaboy
post Mar 24 2018, 06:29 PM
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Then it was working up an understanding of how things need to come together to frame the removable inspection panel.

My main take-away from this was:

I wish I paid closer attention during Geometry class... (IMG:style_emoticons/default/blink.gif)

But it's coming together and I'm starting to think I can achieve what I'm after.


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Jeff Hail
post Mar 25 2018, 12:40 PM
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[quote name='tygaboy' date='Mar 18 2018, 09:18 PM' post='2590237']
Did I say "tedious"?

"Forgive the horrific-ness of this little part. I an no where near skilled / experienced enough to be able to apply the "measure twice, cut once" approach to this part of the project."



Hey Chris,

Think of those as "prototypes". Some folks have scrap bins. We have containers for research and development aka the metallurgical origami department.

Keep up the good work.

Jeff
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Mueller
post Mar 25 2018, 12:55 PM
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How much of this stuff do you dream up while sleeping? Great work.
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Dion
post Mar 26 2018, 09:38 AM
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QUOTE(Mueller @ Mar 25 2018, 10:55 AM) *

How much of this stuff do you dream up while sleeping? Great work.


Agree 100%! I get lost trying to keep up with Chris project.

Talk about architecture. totally cool.

Cheers,Dion
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bbrock
post Mar 26 2018, 09:48 AM
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QUOTE(Dion @ Mar 26 2018, 09:38 AM) *

QUOTE(Mueller @ Mar 25 2018, 10:55 AM) *

How much of this stuff do you dream up while sleeping? Great work.


Agree 100%! I get lost trying to keep up with Chris project.

Talk about architecture. totally cool.

Cheers,Dion


(IMG:style_emoticons/default/agree.gif) We need a blueprint to follow... but we know that doesn't exist. (IMG:style_emoticons/default/av-943.gif) I've never seen a car get constructed around an engine before. Fascinating to watch.
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914350
post Mar 26 2018, 03:38 PM
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Great fab work, beautiful build. Going to be an awsome car for sure. (IMG:style_emoticons/default/beerchug.gif)
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Rand
post Mar 26 2018, 03:55 PM
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QUOTE
We need a blueprint to follow

No, the beauty of a build like this is it's own life not following a blueprint.
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Matty900
post Mar 27 2018, 12:54 AM
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Love seeing the detail of your Art. This is going to be a real masterpiece (IMG:style_emoticons/default/beerchug.gif)
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tygaboy
post Mar 31 2018, 06:11 PM
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Thanks for all your kind and encouraging words. I really need them...

This firewall is giving me fits! (IMG:style_emoticons/default/hissyfit.gif) Every time I think I've solved a problem, I seem to create three others. Today's was REALLY understanding what happens when you tip a plane out of level but want other level planes to intersect with it.

It's hard to explain but let me just say "things weren't lining up". Well, they were, but but not in a way that would let me complete the more complex corners without multiple, tedious cuts and welds and grinds and LOTS of cursing. (IMG:style_emoticons/default/headbang.gif)

(My wife was gardening and poked her head into the shop at one point and said "No more "Goddamnits", please?")

It was one of those days where I thought, "Well, I could always chuck this chassis and start over with a different one...."

But after a bit of noodling, I realized I could simplify things greatly by keeping the planes in line. Great. But that changes all of the dimensions I've worked out so far.

So I cut out all of last week's work and started over by remaking the piece that lives under the cross bar.

Instead of the cool English wheeled, zippidy do-dah, angled approach, it turns out I want it 90 degrees to the vertical part of the fire wall. So, back to tipping flanges on inside curves and stretching to get things flat again. Thankfully, the mag brake lends itself to "interesting" shapes.

Note this new version (#4, btw) has no sides or front. Another simplification is that I'll add the sides and front as separate pieces. This should make it easier to get the beading detail to align across all the various pieces. It'll be easier to explain once I get to that point and have some pics.

And apologies, I'm sure you're as bored with this part of the build as I am...


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