Curvic coupling is an important component used for ultraprecision machine tools in the machinery and aerospace industry. It plays an important role in accurate positioning of materials on the turret so that they can be precisely machined. However, all ultraprecision-360 T cube couplings used in Korea are imported from Japan. This study aims to examine how to use the FEM (Finite Element Method) for large curvic coupling gears for ultraprecision angle division. Commercial software CATIA is used for design, and ANSYS is used to analyze the large curvic coupling gear. In this study, a new type of large curvic coupling gear combining a large gear with curvic coupling is designed on the basis of the fitting equation as the allowable weight depends on the component size. Stress and friction were analyzed in consideration of external forces of the multi-purpose precision angle division gear of the machine tool, and the maximum allowable external forces of the large curvic coupling gear for ultraprecision angle division were inspected. In general, numerical simulation can significantly reduce the time and cost for pilot production, and be used for various applications, as well as curvic coupling

曲线耦合是机械和航空航天工业中用于超精密机床的重要组件。它在刀塔上的材料的精确定位中起着重要作用，因此可以精确地加工它们。但是，韩国使用的所有ultraprecision-360 T立方联轴器均从日本进口。这项研究旨在研究如何将FEM（有限元法）用于大型曲线耦合齿轮的超精密角度划分。商业软件CATIA用于设计，ANSYS用于分析大型曲线耦合齿轮。在这项研究中，由于拟合重量取决于零件尺寸，因此根据拟合方程设计了一种将大型齿轮与曲线联轴器相结合的新型大型曲线联轴器齿轮。考虑到机床多功能精密角分割齿轮的外力，分析了应力和摩擦力，并检查了用于超精密角分割的大型曲线耦合齿轮的最大允许外力。通常，数值模拟可以显着减少试生产的时间和成本，并可以用于各种应用以及曲线耦合