基于正交试验的弧面凸轮减速机构模态敏感性影响因素分析

Analysis of Factors Influencing Modal Sensitivity of the Curved Surface Cam Reduction Mechanism Based on Orthogonal Tests

为了设计出性能优良的弧面凸轮减速机构,提高传动性能,基于空间共轭接触原理,推导了工作曲面方程和共轭接触方程;运用Creo软件对弧面凸轮常量参数进行参数化预处理,完成了弧面凸轮减速机构的参数化设计;依据有限元法,分析了减速机构的前6阶模态,采用正交试验方法进行了试验方案设计;运用统计学理论和方差分析,定量分析了压力角、转盘节圆半径、滚子半径和滚子宽度4个因素对减速机构约束模态的敏感性影响。结果表明,转盘节圆半径、滚子半径的方差值分别为0.021和0.043,均小于0.05,对弧面凸轮约束模态影响较敏感;其次是压力角和滚子宽度。研究结果为弧面凸轮机构设计的振动和噪声研究提供了基础。

In order to design the globoidal cam deceleration mechanism with good performance and improve the transmission performance,the working surface equation and conjugate contact equation are deduced based on the space conjugate contact principle.The constant parameters of globoid cam are preprocessed by using Creo software,and the parametric design of globoid cam deceleration mechanism is completed.According to the finite element method,the first six modes of the reducer mechanism are analyzed.The orthogonal experiment method is used to design the experimental scheme.The influence of pressure angle,rotary pitch radius,roller radius and roller width on the sensitivity of the constraint mode of the reducer mechanism is quantitatively analyzed by statistical theory and variance analysis.The results show that the variances of pitch radius and roller radius of turntable are 0.021 and 0.043 respectively,both of which are less than 0.05 and sensitive to the constraint mode of globoidal cam,followed by the pressure angle and the roller width.The results provide a basis for the study of vibration and noise of globoidal cam mechanism design.