Decrease mass by 25% and to reduce the noise as a result of the higher vibration damping and density of Composite material. These are the goals of the collaborative project which is looking at the design and production of a hybrid metal – composite gearbox. The project involves Compo Tech, Czech Technical University in Prague, Korea Institute of Machinery and Materials and SAMYANG reduction gear Co. LTD working together. Financial support from the Czech Technology Agency (project number: TF03000050). The project has been running since 2016 with a timetable till October 2019.
The most important goal of the project is to develop lightweight high-speed gearbox for application in electromobiles. Therefor, the gearbox main body will be made of composite materials with metal inserted for bearing surfaces. In addition the design and selection of materials considers the damping and natural frequency. CompoTech designed and produced upper part of the gearbox case and also the lower, more complex, part. This is due to the many parts, both winded and laminated, which are adhesively bonded, to produce the design. The composite shafts are also developed by Compotech. These are tested for strength, fatigue and natural frequency and vibration. Test samples with various types of adhesives and adherents were designed, produced and tested to support the design of the gearbox. CTU in Prague supports the design and development with tests and FE analysis. Korean partners provide the technical specification of the gearbox and will finish, assemble and test the gearboxes.