关键词: 谐波减速器, 柔轮失效, 柔轮静态应力仿真分析, 柔轮齿形设计

Abstract: This study investigates the prematurely failured flexible gear through reverse engineering and static stress simulation analysis of on both the failed component and analogous products. The research compares the shape of the tooth of the failured flexible gear with that of several analogous products. The analysis confirms that the main cause of the prematurely failure is the excessively high tooth of the designed flexible gear, which results in large deformation when meshing with the steel gear,and the small transition arc radius at the junction between the tooth surface and the tooth root. This leads to excessive stress concentration during the service process of flexible gear, and ultimately lead to low-cycle fatigue fracture failure of the flexible gear. Based on the simulation and failure cause analysis,several reasonable suggestions are proposed for the subsequent design and optimization of the flexible gear.

Key words: harmonic reducer, failed flexwheel, static stress simulation analysis of flexwheel, gear profile design of the flexwheel