The Street > The Bike Shop
3D printed titanium parts
alaskun:
yeah it bugged me too. I think they cut the seat/chainstays too short, or did the dropout/stay angles wrong or something, and there might not be enough tire/seatube clearance to shorten it any
Dr. Steve Brule:
Nah, track slack innit. Less friction and stops parts wearing out as quick.
alaskun:
http://dustinmbailey.com/littlecassini
the seatstay welds on this one look as good as the dropout welds on the last one of theirs I posted...
https://twitter.com/ideas2cycles
Jan 20 "We made a tech demo showcasing the possibilities of binder jetting technology"
the seatstay/toptube junction really reminds me of 2004ish haro nyquists, and I know they had a race frame that was even more similar...
alaskun:
Van Nicholas‘ ti stem prototypes
http://www.bikerumor.com/2015/11/04/mega-roundup-2-more-weird-and-wonderful-bikes-from-europe-beyond/
http://www.gyro.fr/T_GYRO/PDF/Catalogue-Van-Nicholas-2014.pdf
alaskun:
one of the things I've wanted to see for a while now is something that can print/deposit metal, while coloring it at the same time. eventually it should be just as controllable/detailed as anything with pixels, like high-def anodizing, better than screenprinting...
http://3dprintingindustry.com/2016/01/12/metal-3d-printing-why-you-might-move-to-taiwan-part-6/
--- Quote --- January 12, 2016
...ITRI has also developed a monitoring process for what they hope will one day lead to active feedback during the printing process. Currently, manufacturers of just about every metal printing system (potentially excluding the MetalFAB1 from Additive Industries, but we’ll see) are only building towards a closed-loop for quality control, implementing sensors and software to tightly regulate the print process, but still relying heavily on trial and error. So, while ensuring that the printed part matches the specifications of the designed model is possible, it often involves adjusting the printing parameters over and over until repeatability is achieved.
ITRI is also working on its Optical Engine for Material Grain Microstructure-Controlling AM Technology and developing hardware and software for controlling the microstructure of printed parts, so as to manipulate the physical properties at different points throughout a component. Dr. Ji-Bin Horng, Senior Principal Engineer of the Laser and Additive Manufacturing Technology Center, explains, “We are studying the use of laser for micromaterial processing for possible applications in various industries. For instance, we can imprint in such a way as to generate heterogeneous microstructures. Take an aluminum part, for example. We can change the material properties, so that, near the center, we can enhance the hardness of the part. And, along the perimeter, we can enhance its ductility against high temperature fatigue. For this technology, this year, we were among the 19 finalists of the 2015 R&D 100 award for process/prototyping.”
In a separate machine, the team was able to implement the femtosecond laser technology for a variety of surface finishing techniques that were truly impressive. Dr. Horng holds up a business card holder with colored details on its face.
“We used a femtosecond and nanosecond laser on this substrate to generate many different colors,” he says. “Then, we use a 3D printer to generate these 3D characters. We use the microstructure to cause different patterns of diffraction, controlling how it diffracts the light, to create different colors. We can use our lasers to create different surface finishing to generate many different colors.”
When I asked if this same laser technology could be used to remove prints from their substrates, as well as clean prints as a part of post-processing, he responded with a confident “Yes,” adding, “We can even use our laser technology to polish parts.” He was quick to point out that this was an entirely separate machine from the 3D printers they’d made, but Tzong-Ming Wu believed that it was feasible to combine the two technologies, some day, so that the printer could create a layer, then polish that layer, and so on, to create an even more accurate form of hybrid manufacturing...
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--- Quote ---http://www.medicalplasticsnews.com/downloads/89/download/Fraunhofer%20Laser%20Polishing640x480.jpg?cb=6126ddc97cfccadbc40cc1134acf283d
http://www.medicalplasticsnews.com/technology/fraunhofer-ilt-perfects-fast-laser-polishing-of-titanium-implants/
...laser polishing is 30 to 40 times faster than manual polishing...
...Unlike in conventional processes, the edges are not rounded off when polished with lasers, thus guaranteeing a high geometrical accuracy of the component. Another advantage of laser polishing lies in its far cleaner and more environmentally friendly process. In contrast to manual polishing, no polishing or abrasive materials are used, leaving no chemical residues...
--- End quote ---
not theirs, but related;
I've seen better ones but I don't feel like finding them.
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