Abstract: In this paper, the assessment of the waviness on ground surface is studied and two characteristic values concerning with assessing waviness is proposed. One of the values is the mean wave amplitude, and the other is image parameter to indented the visibility of the wave. The coterie solution of these values is given. Data of computer simulation and casual measurement of ground surface wave are calculated. The results show that all these values and their solution proposed in this paper are valid on the whole, hence it could describe the ground surface waviness. Based on the theoretical analysis of the dynamic system of grinder, this paper researches effect of rotational speed and workplace-centers system stiffness on surface waviness. Both the theoretical analysis and experimental results show that the increase of rotational speed of workplace will make the increase of amplitude of surface wave while cutting depth is constant and the decrease of the stiffness of the workplace-centers system will make the decrease of amplitude of surface wave.

Key words: 表面波纹度, 接触刚度, 磨削刚度, 平均波幅值, 图纹系数, 外圆磨削