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Plywood bending

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3.9k points · 7 days ago

Looks like the Surface Book hinge

2.1k points · 7 days ago

Turn your laptop into a surface pro with this one simple trick!

803 points · 7 days ago

Microsoft hates it!

361 points · 7 days ago · edited 7 days ago

And so will YOU!!

One simple trick...

10 points · 6 days ago

💸💸💸

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Just 3 easy payments!

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Maybe that's where they got the idea

38 points · 7 days ago

Considering how often it's reposted... probably.

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If by "they" you mean MS in the design of the hinge, that could be. I'm pretty sure ancient woodworkers that used this technique long ago would have never seen a Surface Book hinge. :)

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I’ve had my Book for over a year and the hinge still infatuates me. Moving it back and forth is the visual equivalent of popping bubble wrap.

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First thing it reminded me of, too.

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1.1k points · 7 days ago

why the vertical cuts?

They will glue a bunch of inserts into those. When they're dry, they'll sand the protruding bits flat. Then the curve will stay curved.

They will glue a bunch of inserts

biscuits

371 points · 7 days ago

I bought a box of those once, but left them in the rain.
Now they're all limp biscuits.

125 points · 7 days ago

Sucks when stuff like that happens, but you just gotta keep rollin’ rollin’ rollin’ rollin’...

What

KEEP ROLLIN' ROLLIN' ROLLIN' ROLLIN'

Come on.

KEEP ROLLIN' ROLLIN' ROLLIN' ROLLIN'

44 points · 6 days ago

Yeah

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This joke makes me want to break something tonight

It's just one of those days.

You don’t wanna wake up

Everything is fucked

Everybody sucks.

Don’t really know why!

Since they're now limp they may fit into a wider variety of little nookies!

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3 points · 7 days ago

I did it all for the Marri, so you can take the Sugi, and stick it up yur asss

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They probably used the word "inserts" instead of biscuits because 99% of people who aren't woodworkers don't know what word means and they wanted people to understand what they were talking about instead of reading jargon.

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This guy biscuits

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114 points · 7 days ago

They will insert wedges for rigidity.

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Looks like the place you'd glue "wood biscuits" into to reinforce the joint, similar to how you'd use biscuits in other joinery techniques.

And similar to how you use KFC biscuits to permanently join the chicken to your intestines.

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7 points · 7 days ago · edited 9 hours ago

Removed by user

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3.4k points · 7 days ago

Kerfing

This is very common in my trade, so if you have a piece of 1/2” ply your bending, I’d set my saw to an 1/8 maybe a little more depending on the bend, than cut in 1” dashes for roughly 6-8” depending on what your corner length is. We use this application for a lot of custom home building where radius builds are extremely common, it’s a fun and interesting take on carpentry I recommend trying some kerfing yourself

Kerfing, bloody brilliant name for it.

I'm Not going to check so I do hope you are telling the truth.

The kerf of a saw blade is the width of the cut it makes.

TIL, thanks for that little fact

511 points · 7 days ago

Saw blade is its name because it is a blade that is used to saw

You can tell by the way it is

Neat!

10/10

31 points · 7 days ago

5/7 with rice

Perfect score!

woo u like petsi? petsi, no coka only petsi

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Something something Aspen tree.

5 points · 7 days ago

Olly Olly Aspen tree

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People don’t think it be like it is, but it do.

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52 points · 7 days ago

Saw is its name because it is seent.

25 points · 7 days ago

Blade is its name because you can use it to kill vampires that you seent.

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"I see", said the blind man to his deaf dog as he picked up his hammer and sawed.

3 points · 7 days ago

I was pretty sure that he was just talking about his ICEE drink.

"ICEE", said the blind man to his deaf dog as he watched the radio.

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Stop, I can only handle so much in one day

I saw what you did there

Nonsense! Next you'll tell me my table saw has that name because it's a table with a saw!

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11 points · 7 days ago

Always ad kurf to measurements for cutting material ( machinist here!)

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Not to be confused with kerfuffle.

A kerfuffle is what you get when you kerf poorly.

6 points · 7 days ago

It sounds like a sex act for Muppets

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13 points · 7 days ago · edited 6 days ago

not to be confused with an unrelated but similar thing, r/keming

/r/keming is the more active sub, I believe

Fixed

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Have you kerfed today?

you watch your mouth.

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This sounds like a sex act involving shit that you'd look up on Urban Dictionary

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How well does it hold up?

241 points · 7 days ago · edited 7 days ago

This only shows part of the process. The kerfs will be filled with glue, and the perpendicular notches that run along the kerfs will get a spline similar to a little biscuit joint. Then you trim off the excess and sand the whole thing smooth. They're pretty tough once all the glue is set.

100 points · 7 days ago

This gif was taken from a post made in /r/DIY that showed the whole process. Guy was making a coffee table that fit over his ottoman, IIRC. It was very interesting.

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It's made the rounds a few times on both subreddits. The full video is linked somewhere below too.

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15 points · 7 days ago

If I didn't know any better, I'd say you were just making words up now.

Aren't all words just made up? /r/Im14AndThisIsDeep

I didn't even realize that this wasn't in /r/woodworking

Nice to see some of this stuff hit the front page of bigger subreddits.

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Is this how they would do a Tear Drop Camping Trailer? I have always wondered how to get it to do that round shape.

62 points · 7 days ago

This is for a tight radius curve. Plywood is flexible enough to do the teardrop shape without kerfing. Moderate curves may require a bit of time in the steamer to soften the material, or just two layers of thin plywood.

Similarly, no kerfing is needed to make a skateboard kick tail (or a skateboard halfpipe.)

13 points · 7 days ago

We did some custom trim for a job once a while ago that required us to build a steamer in our yard because of the size of the piece of trim and the shape it needed. If I recall, we used a large (20" diameter or so) piece of HDPE or some other heavy duty plastic pipe that was long enough to fit the piece plus the curve needed. We then capped both ends, created an elaborate system out of metal clamps to gradually pull the piece into shape and then would put it in the pipe, ran a steam generator into the pipe and over the course of a couple days would let it set, take it out, change the clamps and repeat.

If you need to do this again, you can do it with just polyethelyne sheeting formed into a bag. Check out this video: https://www.youtube.com/watch?v=--iPQIwSEJM

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Most of the time for skateboards they bend the layers as they make the ply, not after. The glue helps hold the shape.

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Or use unidirectional ply called wiggle wood

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They can steam and utilize pressure and a mold.

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I build RV’s for a living and this is NOT how they get that shape. Fiberglass trailers generally have aluminum frames which are obviously bent using a different method. The units that do happen to be wood underneath are built using curved sticks for support and 1/8” luan that curves to the shape. Then a thin fiberglass “skin” is fastened over top. No plywood. Some teardrops are built using 6 walls in the front and back to get the right radius.

Source: In charge over the “shelling” division of a Jayco plant and we build and install the walls

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36 points · 7 days ago

Does the outer layer crack over time?

Yes. Everything cracks over time.

Happened quick for me

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I found the interrogator!

6 points · 7 days ago

Dammit Garak!

Not black.

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10 points · 7 days ago

It does, but usually the application for this technique would be to bend a piece of nice plywood around a frame. As long as it is properly affixed it should stay stationary and have virtually no stress on the bend

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12 points · 7 days ago

This guy kerfs

It’s Kerf or kothing!

Kerfing

Gesundheit

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23 points · 7 days ago

Why does it need the cross cuts?

39 points · 7 days ago

My guess is biscuits for added strength

25 points · 7 days ago

I thought you were being sarcastic until I saw someone else said biscuits as well. TIL biscuits is a woodworking term.

3 points · 7 days ago

And those damn bicuit joiners can be damn expensive.

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5 points · 7 days ago

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5 points · 7 days ago

Probably add some biscuits and a solid wood piece inside the radius to add stability.

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A lot of car audio subwoofer boxes make use of this for a nice smooth port

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Kerfing is what holds acoustic guitars together.

http://www.rod-neep.com/rod/instruments/rn004-uke/004-05.jpg

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Doesn't it make the wood really weak? It is not only being bent but it has gaps in the weakest point?

That's what wood glue is for :)

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Common in furniture manufacturing is to bend the several sheets that make up plywood in a jig, then laminate them together with glue.

One of the most popular food service table manufacturers is called Plymold.

5 points · 7 days ago

Ah yes, I see you too are in the trade of fishing like me!

I've made a few subwoofer boxes with kerfed ports. They always looked amazing once finished.

You can’t just tell everyone about your amazing kerfed ports and then not post pictures of them.

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We do the same thing in aircraft interiors manufacturing with our honeycomb cores that we sandwich between fiberglass ply layups to make the curved surfaces on cabinets. I had no idea it could be used for plywood as well!

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THANK YOU. I was hoping someone had written something like this.

Second one doesn't seem to work for me (and also doesn't support metric as far as I can tell).

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r/MorningWood

EDIT: I see it's a real sub, so um NSFW

151 points · 7 days ago

Goddamnit idk what I was expecting lol

61 points · 7 days ago

The answer is penis'

Dead penis, don't eat.

Dead don't, penis eat?

23 points · 7 days ago

Dead penis, don't inside.

3 points · 7 days ago

So meta

Peni is the preferred plural

Saw this comment and thought “oh yeah? We’ll see about that” and I don’t think I’ve seen such a closeup of dick before.

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I read this then clicked it anyway. The first image filled my screen. That's the closest I have ever seen another one.

I know right. Fuck why did I do that

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A genuine thank you from me, so hard to find dick pics these days

Edit: a word cos I'm daytime wine drunk

Nah, there are plenty of dick subreddits!

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5 points · 7 days ago

It’s like the sun!

well thats a lot of penises

A forest of dicks.

Well at least we know where to go if we ever need a lot of photos of stiffies,

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I guess you can say it's plyable

Get out.

22 points · 7 days ago

Puns? Trees, wood you please leaf!

Xylem??? Damn near killed him!!!

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Can you explain this to me? I'm stumped.

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120 points · 7 days ago

It would cost me a fortune in plywood before this ever worked for me.

54 points · 7 days ago

As long as you can properly set the depth of your cut, it's basically idiot-proof to replicate what the .gif is doing. If you're talking different curves and angles, it gets slightly more complicated. It wouldn't surprise me if there are directions for common sheet ply and most common curves on the internet, so it's just cut and paste (literally and figuratively)

33 points · 7 days ago

I’ll try it, but will have to do some practice pieces on plywood scraps first. I could definitely un-idiot- proof it

It's not idiot proof at all.

Sure if you have the tools and knowledge how to use them it should be fine.

When you try to free hand 5 20 inch parallel cuts with a circular saw you will start down an expensive rabbit hole of correct tools.

The only people who say "idiot proof" are people who seriously underestimate idiots.

14 points · 7 days ago

*overestimate.

Or... Underestimate their ingenuity, I believe is the quote.

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If there isn’t some sort of wood working/crafts instructional site called “cut and paste” I would be both surprised and disappointed.

if you don't keep your lines parallel it could get messed up. As long as you have a table saw with enough space between blade and fence it should be pretty idiot proof. But if you do it by hand all with a circular saw it would take more skill.

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I think you are either overestimating the difficulty or underestimating yourself.

6 points · 7 days ago

I think you're overestimating people. They make kindergarten scissors for a reason, and it's not just kindergarteners.

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25 points · 7 days ago

When I was younger for skate & bike ramps, we would soak the wood in water and just bend it.

4 points · 6 days ago

For large radius bends that's possible. This is a really tight bend for water or even steam.

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I don’t remember this part of Aang’s training.

50 points · 7 days ago

Everything changed when the 1/2inch-fir-veneer-plywood kingdom attacked

9 points · 7 days ago

this could be korra.

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MS Surface hinge reverse engineered.

Possibly the inspiration for the engineeringhttps://www.reddit.com/design of the Surface hinge, since this has been a technique used in woodworking since ancient times.

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cutting edge technology here folks ...

Smooth.

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33 points · 7 days ago

You could just leave it leaning on a wall and hope it doesn't bend.

spoiler: it will

"GallowPlaceholder"

Hilarious

How dumb does u/GallowBoob think we are?

And with 2 million post karma in 10 months. Jesus.

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18 points · 7 days ago

The Last Plywood Bender

Then, everything changed when the saw nation attacked.

How durable is it though

Water bending, fire bending, earth bending, air bending and now plywood bending. Whats next?

Dab some glue on there and put a backing sheet, and I bet it would be pretty strong.

Hello u/gallowplaceholder it is nice to see you on my front page again. How are you doing today

Put your finger in there

3 points · 7 days ago

I've kerf'd many trannys in my skateboarding/bmx days.

How strong is the wood once it's bent like that?

Or does it become stronger when they fill in the cuts?

4 points · 7 days ago

It almost never stands alone on its own as it is quite fragile after the kerfing. It is meant to bend around a rigid frame to create some type of cabinet or desk. My favorite example is a tellers station at a bank as they often curve around at the end...

3 points · 7 days ago

It's filled with glue and a wooden biscuit is glued into the vertical cuts, then sanded flush. It's as strong as uncut plywood, perhaps stronger since it's an arch.

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I’m in a stall in a public bathroom and when I saw this out loud I said “oh look at that!”. Needless to say I’m going to get some weird looks when i go wash my hands.

How is something like this calculated?

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Well, the depth and width of the cut give you the legs and base of a triangle. A little trigonometry will give you the exact measurement in degrees of the acute angle at the top of the triangle. So if you want to bend the board 90°, you decide how many cuts to make, let's say 6, divide that into 90° to get 15°, and now you have a target for the acute angle on an isosceles triangle.

Okay, so how does that tell you how deep to cut, how many cuts, or how far to space them? What about the width of the cuts themselves (1/8" kerf cuts vs. something wider)?

The isosceles triangle is the hole of the cut after it's bent together. In his example, you should have 6 triangles with 15 degree acute angles on each of them. So the depth of the cut is the 2 long sides of the triangle and the width of the cut is the short bottom side of the triangle. Easily understood after the guy above explained it but would never have figured it out on my own.

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I really want to try this now.

I suppose there was quite a bit of experimenting before they got it right. I wonder if the next step would be to fill the cuts with wood glue to keep the bend it it.

I have some scrap plywood, may give it a go. I imagine it's a combination of cut depth, the number of relief cuts, and spacing.

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What's the purpose of the vertical cuts?

They're probably for inserting another piece of wood to give the curve some more rigidity

Yep. They put splines in there for extra strength

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That gave me wood

If you like this, you should see steam bending. If you have a spare 15 minutes today this is a great video on the subject.

Making a Jarvi Bench

3 points · 7 days ago

And then... everything changed when the plywood nation attacked

3 points · 7 days ago

All I think about is that wodden snake that would always pinch me

3 points · 7 days ago

is this something thats common knowledge in woodworking? I work at a company with woodplant, id send this to them but dont want to look stupid.

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Carpentry 101. Should be more construction gifs. An idea.

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