Abstract: Continuous generating grinding is a hardened gear finishing method, which is widely used in batch processing of small module gear. However, continuous generating grinding will actually form a regular parallel tooth surface texture along the tooth orientation, thereby increasing the gear meshing noise. The meshing and contact point equation are established and the formation process of contact trace is described based on the analysis of the contact properties. The formation mechanism of the whole tooth surface through contact line is discussed. The model of grinding speed and shape of the instantaneous contact point is established, and the grinding path on the tooth surface is calculated based on the analysis of grinding properties. The influence of grinding characteristics on the micro geometry structure of tooth surface is analysed, and then the model of overall surface texture is obtained. And then combined with the relationship between tooth surface texture and noise, the regular texture of tooth surface affects gear meshing of noise. Therefore, the processing method of the variable feed rate is put forward, which changes according to the sine function. Finally, the contrast and variable feed rate machining of continuous generating grinding is carried out. Experimental results show that the position of tooth surface contact point is certain random and the surface forms irregular texture. The value of sound pressure level with different speed decreases by about 3.5 dB, which has reached the effect of tooth surface texture improvement.

Key words: continuous generating grinding, feed rate, gear, noise, tooth surface texture, equivalent stress, frame, sensitivity, Working Conditions, EMU