Abstract：In order to reduce the maximum height Ry of cold roll-beating spline profile and improve the quality of cold roll-beating spline,the forming mechanism of cold roll-beating spline's surface morphology was clarified and the calculation model of maximum height of surface profile was built based on the forming principle of cold roll-beating spline. The relationship between the maximum height of surface profile and feeding rate and related parameters( modulus,tooth number) of different splines was obtained by analyzing the change rule of surface profile height of the cold roll-beating spline from dedendum to addendum. The results show that at the interval from the same trough to peak,from dedendum to addendum,surface profile height increases gradually with the augment of feeding rate and adding rate increases gradually. Surface profile height decreases gradually with the augment of teeth number and reduce rate decreases gradually. Surface profile height increases gradually with the augment of modulus and adding rate changes from high to low. The effect of feeding rate on surface profile height was significant and modulus and teeth number of spline has a little effect on surface profile maximum height. The effect of feeding rate on surface profile was verified by cold roll-beating spline experiment andthe result of the experiment also shows the correctness of the model of surface profile maximum height.

Keyword：cold roll-beating spline;surface profile maximum height;feeding rate;surface microcomic profile precision;