Research Activities on Advanced Simulation, Modeling and Optimization of Gear Manufacturing Processes
The long-term research activities and extensive studies conducted on gear manufacturing processes at the m3 Lab led to the development of a CAD-based simulation model, namely OPLITIS, for the detailed analysis of gear cutting operations. OPLITIS is an advanced gear manufacturing simulation software developed for the analysis, visualization, and optimization of generating gear cutting processes. The software was created at the m3 Laboratory (Micromachining and Manufacturing Modeling Laboratory) of the Technical University of Crete as part of research activities focusing on advanced manufacturing technologies, machining simulation, and computational modeling of gear production processes. OPLITIS focuses on the accurate simulation of cylindrical gear manufacturing methods such as gear hobbing, gear shaping, gear planing, and power skiving, enabling engineers and researchers to study the complete kinematics of the cutting process in a virtual manufacturing environment. The software combines CAD-based solid modeling techniques with manufacturing process simulation in order to reproduce the actual interaction between the cutting tool and the workpiece during gear generation. Through this approach, the software is capable of calculating the undeformed chip geometry, chip thickness evolution, material removal mechanisms, generated tooth flank geometry, and the cutting forces developed throughout the machining operation. The system supports both spur and helical gears, as well as external and internal gear geometries, providing detailed three-dimensional representations of chips, tool trajectories, and generated gear gaps. A major characteristic of OPLITIS is its ability to model the real penetration of the cutting tool into the workpiece using high-accuracy geometric calculations integrated within commercial CAD software environments. This allows the prediction and optimization of critical manufacturing parameters affecting gear quality, dimensional accuracy, cutting load distribution, machining stability, and tool wear. In addition, the software offers extensive visualization capabilities for studying the manufacturing sequence step-by-step, making it valuable both for industrial process optimization and for academic research in gear manufacturing technology. OPLITIS is therefore positioned as a specialized engineering platform that integrates manufacturing science, computational geometry, CAD/CAM methodologies, and machining simulation into a unified tool for advanced analysis of gear cutting processes.
