Robot Bike Company Blends 3D Printed Titanium with Carbon Fiber for R160 Mountain Bike Frame

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robot_text_logo_white-2As someone who considers himself to be an avid cyclist, my calves get butterflies whenever I see or hear about 3D printing technology being utilized by a bicycle manufacturer. The effort has been undertaken on numerous occasions, assisted by some of the most prominent companies in the 3D printing industry. Back in February, Montague Bikes enlisted the help of Shapeways, which helped the bike company 3D print their foldable bicycle in aluminum material. Just prior to that, a group of Dutch students used MX3D’s metal 3D printing prowess to create a complex and unique bicycle of their own.

The R160 in action

The R160 in action

One of the most desired materials for bicycle manufacturing is carbon fiber, which is both lightweight and strong enough for some serious mountain biking. Carbon fiber mountain bike frames are traditionally casted from a mold, typically making custom-built carbon fiber frames a difficult endeavor. But the UK-based bike manufacturer Robot Bike Company has found a way to incorporate metal 3D printing with carbon fiber tubes, which has resulted in their R160 full-suspension mountain bike frame.

Titanium 3D printed lugs

Titanium 3D printed lugs

To make the R160, Robot Bike Company uses titanium 3D printing to procure lugs, which are a type of tubing mated with socket-like sleeves used to construct bike frames. These lugs are then used to join together the carbon fiber tubes, which are cut to the size of the rider’s measurements and bonded to the 3D printed titanium. According to the bike company, they use a type of Laser Powder Bed Fusion Additive Manufacturing technology similar to that used by aerospace companies like Airbus, Boeing, and GE. Not only does 3D printed titanium bond well with the carbon fiber tubes, it also provides adequate support to areas that will receive a heavy load.

The titanium powder, which is fused together by a high power fibre laser, is capable of reaching a resolution of between 10-45um. After printing, it’s heat treated for optimized mechanical performance, then CNC machined for bearing, headset, and bottom bracket fit. Robot Bike Company also utilizes topology optimization, an algorithmic approach to optimize material layout within a given space, which ensures that their bike frames are both lightweight and resistant to material fatigue. This computer-generative design approach is sourced from their partnership with Altair, a leading provider in topology optimization software.

The finished product is a mountain bike frame that weighs approximately 29 lbs and is uniquely fitted to each customer. Each R160 is specially manufactured according to measurements provided by the customer, as well as the type of riding they plan to undertake. The angle of these 3D printed lugs are equipped according to the dimensions and information provided by the rider, ensuring maximum comfort and stability.

robot-bike-r160-2

The R160 (bike frame only) is currently available to order from Robot Bike Company for £4,395 (approximately $6,360), and takes about four weeks to manufacture and deliver after information is submitted and the purchase is made. By combining 3D printing technology and topology optimization together, the R160 is a cutting-edge mountain bike frame engineered to be as lightweight and mechanically stable as possible. Though I one day dream of being able to customize and 3D print a bicycle of my own, I’ll leave it to professionals like Robot Bike Company to pave the trail first. Discuss further in the 3D Printed Mountain Bike forum over at 3DPB.com.

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