内平动分度凸轮机构扭转刚度及其部分影响因素分析

Factors Influencing the Torsional Stiffness of Inner Parallel Indexing Cam Mechanism

以内平动分度凸轮机构为研究对象,针对其结构特点搭建了扭转刚度测试实验台,并进行了扭转刚度实验测试.构建了该机构不同转角位置下的传动结构三维模型,对内平动分度凸轮机构内部轴承刚度进行了建模求解.利用ANSYS软件建立了考虑该机构非线性轴承刚度及分度期内针齿凸轮啮合状态的有限元分析模型.通过各仿真结果和实验结果的对比分析,验证了该机构轴承刚度及分度期内针齿凸轮啮合状态为该机构扭转刚度的主要影响因素.

Taking inner parallel indexing cam mechanism as research object,a torsion stiffenss test platform was set up andthe torsion stiffness test was conducted.A3D transmission structure model of the mechanism with different rotation angleswas constructed according to the structural characteristics of the mechamism.The internal bearing stiffness of the mechanismwas modeled.A finite element analysis model which deals with the nonlinear bearing stiffness and meshing state between thecam and pins was constructed by using ANSYS.The simulation and experimental results show that the nonlinear bearingstiffness and meshing state between the cam and pins are the main factors influencing torsional stiffness.