| 摘要(英) |
Harmonic drive is a compact and high gear reduction ratio used in industries such as aerospace, automation, medical etc. The harmonic gear is the key component influencing the performance. Therefore, this paper proposes a novel tooth profile design method called ETE (Ellipse arc-Tangent line -Ellipse arc) tooth profile for harmonic gears. This design method includes the CTC (Circular arc-Tangent line-Circular arc) tooth profile, as the circle is a special case of ellipse. This design approach enhances the flexibility of tooth profile design, effectively improving the transmission performance of the harmonic drive. In this study, the FEM-MBD (Finite Element Method-Multi-Body Dynamics) simulation is used to analyze the transmission errors and flex spline tooth surface stresses of various tooth profiles to evaluate performance differences. Due to the high efficiency and the capability to process both internal and external gears, power skiving was chosen as the production technology for harmonic gears. The power skiving tool is derived from the tooth profile of the harmonic gear, enabling the production of ideal harmonic gears using this tool. Furthermore, considering the tooth profile generation of the power skiving tool. The cross-sectional profile of the hob is derived from the tooth profile of the power skiving tool, enabling the production of ideal power skiving profile using this tool. The paper describes the machine tool motion for power skiving in the gear manufacturing process. The tooth profile parameters of the hob are adjusted to achieve crowning along the tooth profile direction, and the machine tool motion parameters are adjusted to modify the tooth length direction. Finally, numerical examples in this paper will verify the accuracy of the mathematical model for power skiving and compare the simulation results between CTC and ETE tooth profiles. |
| 參考文獻 |
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