International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The paper addresses the problem of designing 3D models of gears, how well the resulting involute profile corresponds to the real one. Very often are used 3d models of gears to produce various gears through 3d prototyping. Some of the most used CAD systems (Solid Works, Solid Edge or Autodesk Inventor) are used to design the 3D models. The comparative analysis made shows the accuracy of modelling the involute profile of the 3D models from different CAD systems compared to the real profile, what are the deviations and how suitable it is to use them for 3D prototyping of gears. Solutions are presented to obtain realistic gear tooth profiles.

In this study, optimisation of speed gears for a tractor transmission was performed with KISSsoft software. Optimisation was carried out under three constraints. These constraints are input power-torque, volume for system in transmission and gear ratio for each speed. The purpose of this study was to optimize the module, face width, gear quality, centre distance, number of teeth, helix angle, addendum modification coefficient and pressure angle for each speed considering the constraints. Tooth bending stress, tooth contact stress, contact ratio and specific sliding were considered for evaluation during optimisation. Strength calculation of gear pairs which were optimized and defined all geometrical parameters with KISSsoft were also calculated with mathematical model indicated in ISO 6336. Then, the results were compared.

Paper deals with specifics of converting a conventional car into an electric one. The main stages of the conversion process are dealt concise but thorough. The findings are the basis for launching a large scale project with the necessary duration and financing, as a result of carrying out the necessary development activities and experiments will proceed to the development of a prototype, which will ultimately be realized. The overall focus is on research and application in the students’ learning process.