The Street > The Bike Shop
3D printed titanium parts
Sasper:
ohmahhgaaawdd ( spelling? ) that RNC picture is so good. reminds me of great times in bmx!
torontoflatlander:
--- Quote from: Sasper on March 13, 2015, 12:33:04 PM ---ohmahhgaaawdd ( spelling? ) that RNC picture is so good. reminds me of great times in bmx!
--- End quote ---
I sold mine to Laz. I want that sprocket back! $20
alaskun:
I just offered him $175 for it the other day and he turned me down :(
Pretty good reading here...
http://3dprintingindustry.com/2015/03/10/3d-printing-titanium-the-bin-of-broken-dreams-part-1/
http://3dprintingindustry.com/2015/03/11/3d-printing-titanium-the-bin-of-broken-dreams-part-2/
http://3dprintingindustry.com/2015/03/12/3d-printing-titanium-the-bin-of-broken-dreams-part-3/
--- Quote ---...I visited MicroTek Finishing — a major player in the metal 3D printing world. While there, I spoke with Tim Bell, who related an anecdote about his time at Morris Technologies, the aerospace 3D printing giant that was acquired by GE in 2012. Tim was a product development leader at Morris, and he talked of a large bin that they had in their shop. It was called the “Bin of Broken Dreams”, and into it went an endless stream of failed parts.
My part has now been printed in six different build configurations. We (and, by we, I mean Dave Bartosik, whose creativity and enthusiasm for getting the build to work was inspiring) added solid supports in a number of places, chasing built-in stresses around the part with each iteration. The latest prototype, although nonfunctional, is nevertheless a big improvement on the earlier builds — and the process has taught us a lot about the idiosyncrasies of my design.
...
Build 3
Build 3. The saddle clamp and bolt boss are both anchored, but the center of the part lifted.
Build 4
Build 4, heat treated & wire EDM’d off of the build plate. The bottom of the part is distorted & lifted. The purple color comes from the heat treatment process.
...
Build 6
Build 6. The part is basically round, but has a bulge in the middle of the seatmast clamp.
Build 6, with the bulge clearly visible on the bottom edge.
Throughout each of these builds, three things have remained consistent. First, the surface finish on the exterior of the part leaves much to be desired; it will definitely need to be finished in a separate step. Second, the surfaces that needed to be EDM cut from their solid supports (the saddle clamp and the bolt boss) are irregular, and will need to be smoothed into the rest of the part. Third, the internal diameters will almost definitely need to be post-processed by machining or EDM — even the saddle clamp, which, overall, had a passable surface finish, was undersized by .020″ — about four times the desired variance.
The net effect is that after six build iterations — each of which took almost two full days to set up, build, stress-relieve, and cut off of the build plate — we still don’t have a functional prototype to test...
--- End quote ---
older stuff...
Flying Machine?
bike in background looks like one of theirs, and it's australia http://www.bikerumor.com/2014/07/31/flying-machine-sharpens-3d-printing-offers-f-one-hd-with-invisible-titanium-lugs/
some sort of pitbull-style brake? aside from the arms, I have no idea what I'm looking at...
http://www.crpmeccanica.eu/
http://www.designfax.net/news/stories/feature-6.asp
http://www.productionmachining.com/articles/direct-metal-laser-sintering
--- Quote ---This titanium structure for a brake on a competition bicycle is hollow, improving performance and reducing weight. Production with DMLS took 11 hours, a significant cost and time reduction compared with casting.
--- End quote ---
alaskun:
http://www.slideshare.net/AltairHTC/riding-into-the-future-3d-printed-bike
--- Quote ---Here is a new "Lumberjack Slam" handlebar...it's 9" X 32" and the same weight as a normal Slam XLT thanks to our new "Honeycomb" crossbar design. We are also working a a whole frame with this new 4Q Baked tube set. Stay tuned...we'll have it at Interbike.
--- End quote ---
Ultralight 3D-printed beams could bear heavy loads
alaskun:
"Fooly's Major Glory"
--- Quote ---http://forums.mtbr.com/frame-building/foolys-major-glory-822434-post10669926.html#post10669926
09-10-2013
The linkage is DMLS (direct metal laser sintering), 6/4 titanium and its hollow! I was originally looking at doing an investment casting. However for just one part no one wanted to switch over to the high quality metal, and to make the bearing holes required secondary machining. Next I considered having the part CNC'ed, the cost was lower than having an investment cast plus the secondary machining.
I was working with a local prototype shop who specialize in small run stuff. But the salesman kept pushing to run this part on his new 3d printer. I had made parts in SLA (stereolathagrophy) and SLS (selective laser sintering) before for my regular job. But I absolute didn't want this part in plastic, no matter how good the process has improved since my last few time I had made some parts.
But this got me thinking, has SLA/SLS improved enough to start making parts in metal? After doing some research, indeed they do! And in Titanium! I was sold, I redesigned the linkage to take full advantage of the DMLS process. And there it is!
--- End quote ---
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version