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/diy/ - Do It Yourself

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758668 No.758668 [Reply] [Original]

https://www.youtube.com/watch?v=GbDMlNjrUM4

http://www.thingiverse.com/thing:642942

>> No.758705

Heh. I guess we really wouldn't be able to make this type of thing without 3D printing it.

Sure, we could add the constraint later, but this is quite unique.

>> No.758743
File: 7 KB, 251x300, coolbit_459870.jpg [View same] [iqdb] [saucenao] [google]
758743

cute, but rather useless. like a lot of 3-D printed stuff... :|

try this mind fuck on for size: a tungsten-carbide drill bit with internal (helical) cooling channels for running spindle-fed coolant.... and yes, the coolant holes are helical-shaped

>> No.758749

>>758743

I've seen those before. Didn't know the coolant channels were actually helical. I figured they just went through the center and branched at the end, but I suppose that would greatly compromise the structural integrity of the bit.

But then how the fuck are they even made? I can only assume that the bit is formed with the channels open, then the sides welded on before being ground and sharpened...

>> No.758759

>>758743
tungsten carbide is sintered, so they probably have a pair of retractable spiral thingies in the mould rather than some immensely complex 3d print process

>> No.758772

>>758743
>>758749
>>758759

They take a blank, grind a non helical drill with stock on it, heat it up and twist it to shape. Then they touch it up with a finish grinding and apply all the fancy cutting geometry. Obviously the thru coolant holes were already pre drilled.

>> No.758774

>>758772
No they don't.

>> No.758775

>>758772
>cant into metal

>> No.758783

>>758705
You could make it from wood. There are all sorts of tricks to bend wood with heat, water and time. There are quite a few tricky little objects of curiosity similar to that made from wood.

You might also be able to do it with metal if you heated the nut and it expanded enough to slip it over the end and then allowed it to cool in place. They made barrels, wagon wheels and even some types of cannon that way.

>> No.758790

>>758749
http://www.youtube.com/watch?v=bo_IUu6U4ao
apparently it's done with fishing line

>>758772
cemented tungsten carbide, breh. it would be like heating and twisting a cinderblock.

>> No.758791 [DELETED] 

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>> No.758813

>>758668
What's impossible about it?
With a similar sized metal (or wood) bolt, you could put the nut on, then quarter the bolt end and splay it out like that. A little heat and it would stay. (wood would need some moisture).
Am I missing something?

>> No.758820

>>758668
reminds me of some impossible bolts that I think my friends CADed up, or maybe just stole as their own work.

Had diagonal bolts for diagonal holes, two head size bolts for multiple wrench sizes, breakaway head bolts, etc.

My favorite was a planetary gear bolt so you didn't have to turn as hard

>> No.758853
File: 3 KB, 180x144, C__Data_Users_DefApps_AppData_INTERNETEXPLORER_Temp_Saved Images_180.jpg [View same] [iqdb] [saucenao] [google]
758853

Self sealing stem bolt

>> No.758892

>>758743

You can make a lot of practical things with a 3D printer, it would just be cheaper to buy them at Wal-Mart and so nobody talks about them.

>> No.758926
File: 16 KB, 232x194, 1371606919527.jpg [View same] [iqdb] [saucenao] [google]
758926

>>758668
Using a screwdriver as a hammer.

>> No.758930

>>758926
Lacking a hammer, he could do a quicker job by pounding it with his fist.

>> No.758964
File: 67 KB, 450x189, jet turbine blade.png [View same] [iqdb] [saucenao] [google]
758964

>>758743
>>758759
>>758772
I present to you a jet turbine blade, it has a weird S-shaped channel in it that's really difficult to make. Just making molds requires a huge number of steps.

Except not any more. 3d printers have been demonstrated capable of printing the mold in one step.

Now on cutting tools, we can print tungsten carbide. We're also getting to the point where we can print tungsten carbide here and steel there and go between them, so tools are less resistant to fracture. It's just not worth it right now.

Source on printing carbide:
http://utwired.engr.utexas.edu/lff/symposium/proceedingsarchive/pubs/manuscripts/2010/2010-18-ott.pdf

>> No.758976

>>758964

Let me know when 3d printing can do single crystal printing. Until then, it's not even close to the cutting edge.

Also: what is 5+ axis cnc

>> No.758977
File: 159 KB, 720x540, 3d printed single crystal.jpg [View same] [iqdb] [saucenao] [google]
758977

>>758976
>>758976
We can 3d print single crystals:
www.midwestsampe.org/content/files/events/dpmworkshop2012/Suman_Das_Presentation_DPM_Workshop_Nov_13-14_2012_Final.pdf

Pic related

>> No.758978

>>758977

They may be calling it single crystal but then why am I seeing grain structures?

>> No.759023

>>758783
Well yeah, but that is making the 'working' thing first and then adding the constraint.

I know it's kind of an arbitrary distinction, but you can't really make this in the same way without 3D printing.

>> No.759027
File: 862 KB, 1197x755, single crystal ebsd.png [View same] [iqdb] [saucenao] [google]
759027

>>758978
here's the EBSD map showing where the grains are.


Although this technique probably isn't as economical as printing single crystal molds. We can print molds good enough to cast single crystal turbine blades so who really needs to directly print single crystals?

>> No.759035

>>758853

What good is that without a revers-ratcheting routing planer?

>> No.759051

>>758705
>Get fat screw
>Put bolt on it
>Cut top of bolt into quarters
>Stretch the pieces apart.

Why not?

>> No.759055

>>758705
You could easily make a bolt like that, and then use some sort of clamp to hold the parts together while you screw on the nut.

>> No.759064

>>758668
God dammit faggot OP, answer why the hell this is impossible or goto /toy/.

>> No.759094

>>759027

Yeah... grain means it's not single crystal. I mentioned single crystal because dipping to get single crystal is expensive and time consuming. And wide spread single crystal is the future of turbines.

>> No.759110 [DELETED] 

>>758853
>>Self sealing stem bolt
Who even needs that many of those?

>> No.759113

>>758853
>>Self sealing stem bolt
I'll trade you some land for all the self-sealing stem bolts you have.

>> No.759304

>>758743
Tugsten carbide drills are extruded and twisted in the same operation. Then are sinterized.
HSS are drilled, and twisted, then mechined.
I'm lookiing for the vids now.

>> No.759306

>>758926
He DOES use a makerbot afterall