高重合度弧齿锥齿轮的三维建模及加工试验

3D Modeling and Tooth Milling Experiment of Spiral Bevel Gear with High Contact Ratio

重合度较大时,参与啮合齿的对数增多,齿轮传动就越平稳,每齿承载的力也减小,这对于降低噪声是非常有利的。根据螺旋锥齿轮的非零变位原理,进行负传动设计,改善其啮合性能。在此基础上,借助于局部综合法、TCA技术等仿真方法,通过改变接触路径的倾斜角度,以获得具有较大重合度的弧齿锥齿轮。对新型设计和常规设计两种方案的几何参数和加工参数进行了对比,并创建齿轮副的精确三维模型,基于UG运动仿真功能模拟大小轮接触区状况。铣齿试验表明,接触区良好,易于调整,验证了利用局部综合法与非零变位技术设计的高重合度弧齿锥齿轮的可实施性。

When the contact ratio is bigger,logarithm of tooth meshed increase,and the gear transmission is more stable.At the same time,the force that each gear tooth loaded decrease,which is very beneficial to reduce noise.According to the theory of Non-zero modification in this paper,negative transmission design was adopted to improve the meshing performance.Based on thelocal synthesis method and TCA technology,a new approach to the gear design for increasing the contact ratio is proposed by means of sloping the contact path in the paper.Comparative analysis on geometrical parameters and milling parameters between conventional design and new design has been carried out.The milling experiment results prove that the tooth contact area is standard and easy to control,Which have proved that spiral bevel gears with high contact ratio designed by local synthesis method and the non-zero modification technology can be implemented.