We doubt you’ll be driving a Bugatti Bolide anytime soon. It’s a bit of a showy concept car, and it really is pushing some limits on what you can 3D print in an automobile. As you can imagine, they aren’t printing car parts out of ABS or PLA. According to The Drive, the prints use selective laser melting with titanium to make some impressively strong and light parts.
It isn’t just the material that makes the 3D prints strong. Bugatti actually patented the internal structure of some parts which are almost bone-like. By having the parts largely hollow, the weight is cut. But fine internal structure creates very strong parts. How strong? A 3.52 ounce pushrod can handle up to 3.85 tons. The printed titanium is apparently heat-treated to increase its resistance to fracture strains.
In addition to titanium, some of the concept car’s parts are printed ceramic which insulates some components from heat. The printing process can apparently get resolutions down to 0.1 mm. Many parts are quite lightweight including a 0.48 mm wheel that with supports weighs in at about 100 grams.
If you want to get into having a project car, we’d suggest something more modest. Even if you want to 3D print a titanium part for your ride, we’d still start a little smaller.
Wow. [Jim Smith] of Grass Roots Engineering has just put the finishing touches on his entirely 3D printed kayak. And it floats.
The individual parts were printed on [Jim’s] massive home-made 3D printer, which is loosely based off a RepRap — except that its maximum build volume is a whopping 403 x 403 x 322.7mm.
The kayak itself is made of 28 printed sections, and to hold it all together, he has installed brass threaded thermoplastic inserts, which then allow the pieces to be bolted together. Silicone caulking is applied before assembly to ensure a watertight seal.
It was originally based off of a Siskiwit Bay kayak by [Bryan Hansel] but [Jim] has heavily modified it to suit 3D printing. It was printed at a layer height of 0.65mm to reduce print time, which still ended up being over 1000 hours! He even optimized the design to improve performance based on his own height and weight.
Continue reading “3D Printers Can Only Make Trinkets — What About Kayaks?”