How I built a thing.

Aug 3, 2016 1:27 AM

Strostkovy

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36616

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967

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57

Apparently my prior post was too vague: http://imgur.com/gallery/Kt8rsx8

First, get a high poly model. This is the only part I downloaded and did not do myself.

Shove it in Make 123D, and you get low poly bear. Export DXF files from here.

The DXF files the previous step gives you suck, so spend some time properly nesting parts. 123D said it would take seven 4' x 4' sheets of metal. I got it down to five.

Now to cut out the parts. I made the whole bear out of 24 gauge mild steel. Since I intend to sell this at an auction at a county fair, rust is considered a feature not a problem.

I cut all of the parts on a PlasmaCAM.

Since the school year had ended at this point, and I began working full time, I could no longer go to the school shop. But no matter, I had already made this brake to bend metal, (details: http://www.homemadetools.net/forum/little-swing-brake-47631) so everything should be good, right?

Wrong. The above brake can only handle about 40% of the bends on this project, because the parts themselves can interfere with the shape of the brake. So I had to make a press brake, which can bend up to 12" of 24 gauges, which requires 1.8 tons of force. Also, since I had no school shop access, I had to do it at home, with my old MIG welder and a saws all. (Yes, I cut 2" x 1/2" thick plate with a blade rated for up to 1/8" several times. It took a while). It takes moderate force on the screws, but not as bad as one might think.

As of now I only had flat parts. Make 123D, to my knowledge, does not allow you to export angles. To do this, I imported the STL to Sketchup, and manually rotated each bend and recorded the angle. This took a long time; there are 500 triangles.

Starting bending, the fitup came out pretty good. I drilled holes for rivets after the parts were bent, and used a harbor freight rivet gun to put in 380ish rivets.

This is an average piece. It took 30 pieces like this.

After this point I stopped taking pictures.

Potential answers to potential (and prior) questions:

I would sell another for $800
Yes it will rust
The bear has no welding on it.
500 polygons, 380 rivets, around 400 bends (bends are currently estimated)
Weighs 60 ish pounds.
Is probably strong enough to ride, but am not risking it.
No
Yes
Maybe
...What?

10 years ago | Likes 42 Dislikes 1

Keep it up! I'd totally want one of those.

10 years ago | Likes 1 Dislikes 0

Its like the Bear in downtown Denver

10 years ago | Likes 1 Dislikes 0

Oh dear God! All that bending.

10 years ago | Likes 1 Dislikes 0

Harbor Freight is the greatest place ever

10 years ago | Likes 2 Dislikes 0

Clear coat it so it won't rust or for nextime clear coat all the pieces before assembly so u can get inside and put

10 years ago | Likes 2 Dislikes 0

Nice work, reminds me of the project a dude did in our welding class, he did a Megadeth vic head, was detailed but not like your bear.

9 years ago | Likes 1 Dislikes 0

Having done plenty of papercraft, and now seeing it done in metal all I have to say is, make Ironman armor next ;)

10 years ago | Likes 1 Dislikes 0

Man, Build-a-bear got an upgrade.

10 years ago | Likes 1 Dislikes 0

Nice selection of stained glass you have there

10 years ago | Likes 2 Dislikes 0

That is my mom's. I built this in my garage, which is my dad's wood shop. Between the glass and the metal, he's getting pretty tired of it.

10 years ago | Likes 2 Dislikes 0

Craftsmanship certainly runs in the family. Time for expansion!

10 years ago | Likes 1 Dislikes 0

This is amazing! What a work of art.

10 years ago | Likes 1 Dislikes 0

I think I want to have sex with it..

10 years ago | Likes 2 Dislikes 0

You wouldn't print a bear!

10 years ago | Likes 56 Dislikes 0

He download the bear..

10 years ago | Likes 3 Dislikes 1

10 years ago | Likes 2 Dislikes 0

Thought this was a repost until i saw the instructions. nice job @OP

10 years ago | Likes 1 Dislikes 0

Neat!

10 years ago | Likes 1 Dislikes 0

10 years ago | Likes 1 Dislikes 0

That's awesome OP. Great job

10 years ago | Likes 16 Dislikes 0

W

10 years ago | Likes 1 Dislikes 1

That is awesome. I'd love the eh... pattern? I made some animals from cardboard before. But I'm too stupid for 3d software.

10 years ago | Likes 1 Dislikes 0

Just try Make 123d. It's made for people who don't know how to model. Just open a 3d model you get online, it does the rest.

10 years ago | Likes 3 Dislikes 0

Thank you. I had a look. For now I feel more apt with scissors and glue. 3D still baffles me. I need to learn more.

10 years ago | Likes 1 Dislikes 0

Pretty sure Katie parry did the same thing at superb superbowl a few years ago. Still good job op +1

10 years ago | Likes 1 Dislikes 0

Nice poly-bear.

10 years ago | Likes 1 Dislikes 0

How long did this take you?

10 years ago | Likes 1 Dislikes 0

About 100 hours, all errors included.

10 years ago | Likes 2 Dislikes 0

That is WONDERFUL!

10 years ago | Likes 1 Dislikes 0

That bearly looks like it

10 years ago | Likes 1 Dislikes 0

My question is, where is the secret panel for entrance to Narnia?

10 years ago | Likes 14 Dislikes 0

Don look in the butt its not there

10 years ago | Likes 3 Dislikes 0

Oh that's in my closet. I'll go in there to take it out.

10 years ago | Likes 1 Dislikes 0

Ahh yes. I remember you from the darkness of hell that is super smash bros

10 years ago | Likes 1 Dislikes 0

as a fabricator who normally operates a 230 ton cnc press brake, i laugh at you puny vise brake, but commend your inginuety

10 years ago | Likes 3 Dislikes 0

Dang, you must have to use a big ratchet for that.

10 years ago | Likes 2 Dislikes 0

yeah; it uses a massive hydraulic ratchet. ; )

10 years ago | Likes 2 Dislikes 0

I live in a highway town with statues of these animals dang near everywhere, it's almost unbearable. We even have a pirate one 1/2

10 years ago | Likes 4 Dislikes 0

Now do one out of 1/2" AR400

10 years ago | Likes 1 Dislikes 0

Dude. That's fucking awesome. Keep building

9 years ago | Likes 2 Dislikes 0

I see you

9 years ago | Likes 1 Dislikes 0

Lmfao now literally

9 years ago | Likes 1 Dislikes 0

I literally see you or you literally laughed your ass off? I have some duct tape I can use for either.

9 years ago | Likes 1 Dislikes 0

Haha you my friend have made me laugh a few times already! I should have duct tape somewhere... low key, need to do squats tho

9 years ago | Likes 1 Dislikes 0