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一、引言在磨削过程中,由于磨削条件的变化,如砂轮的不平衡、工作台的移动等,使得磨削稳定性在不断地变动。若磨削过程失稳,颤振就会发生,在工件表面上留下磨削振纹。凿岩机的活塞磨削中就存在这个问题(见图1)。振纹的特点是一般易被人的肉眼所识别,又与表面粗糙度有相似之处。本文中振纹值W由周向振纹节距均值与轴向振纹节距均值的综合加权评分值而得 W_i=b_(周向)W_(i周向)+b_(轴向)W_(i轴向)式中b为系数。
I. Introduction In the grinding process, due to changes in grinding conditions, such as wheel imbalance, table movement, making the grinding stability is constantly changing. If the grinding process is unstable, flutter will occur, leaving a grinding chatter on the surface of the workpiece. This problem exists in the piston grinding of a rock drill (see Figure 1). The characteristics of the chatter is generally easy to be identified by the human eye, but also with the surface roughness are similarities. In this paper, the value of the moire W is obtained from the comprehensive weighted scores of the average value of the circumferential vibration pitch and the axial vibration pitch W_i = b_ (circumferential direction) W_ (i circumferential direction) + b_ (axial direction) W_ (i axis To) where b is a coefficient.