蜗杆砂轮磨削齿面纹理主动调控方法研究

Research on the active control method of worm wheel grinding tooth surface texture

齿轮在磨削过程中会产生规则的、沿齿向方向相互平行的齿面纹理,更容易造成大的齿轮啮合噪声。针对该问题,提出了一种基于柔性电子齿轮箱多轴同步附加运动的齿面纹理主动调控方法。首先,建立齿面和砂轮表面数学模型以及齿面纹理角度模型;其次,对运动轴施加附加运动,建立齿面纹理角度与附加运动多项式系数的关系;然后,采用敏感度矩阵结合最小二乘估计确定运动轴附加运动多项式系数,获得目标纹理角度;最后,对运动轴附加运动后的磨齿齿面纹理进行仿真,并与常规加工和采用低噪声偏移(low noise shifting)技术生成的纹理进行比较。仿真结果表明,运动轴附加运动的方法可以获得倾斜不规则的磨齿齿面纹理,证明了这种方法的可行性。

Aiming at this phenomenon that gears produce regular and mutually parallel tooth surface textures along the tooth direction during grinding are more likely to cause large gear meshing noise,a tooth surface texture active regulation method based on multi-axis synchronous additional motion of a flexible electronic gearbox was proposed.Firstly,the mathematical models of tooth surface and grinding wheel surface and tooth surface texture angle were established.Secondly,the additional motion was applied to the motion axis to establish the relationship between tooth surface texture angle and additional motion polynomial coefficient.Then,the sensitivity matrix combined with least squares estimation was used to determine the additional motion polynomial coefficient of the motion axis to obtain the target texture angle.Finally,the gear grinding texture after additional motion of the motion axis was simulated and compared with the texture generated by conventional machining and low noise shifting technique.The simulation results show that the method of additional motion of the motion axis can obtain the tilted irregular tooth surface texture,which proves the feasibility of this method.