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一、前言在外圆磨削中,尤其是想要获得高光洁度的加工表面时,用刚修整的锋利的砂轮进行磨削,往往会出现沿着工件的圆周方向作等距离排列的、与轴向几乎平行的磨削条纹(其细部类似锉刀纹)。对于象图1的工件,磨削后只要用水砂纸轻抛其表面,就可显露出周向和轴向振纹(见图2)。这种振纹用表面粗糙度很难确定,为此,引进了振纹节距这个概念,它说明振纹间距的长短变化。周向振纹节距是指弧长间距。影响工件表面特征的因素一般划分为沿磨削速度方向及与它垂直的方向。沿磨削方向上的表面特征将随磨削过程的运动参数(如磨削深度、砂轮直径)而变化,垂直于磨削方向的表面特征将更多地随砂轮切削表面的变化而变化,并与所研究的振纹有较密切的关系。
I. Introduction In cylindrical grinding, especially when you want to obtain a high-finish machined surface, grinding with newly trimmed sharp grinding wheels often occurs equidistantly along the circumference of the workpiece, Almost parallel to the grinding stripes (details similar to the file pattern). For the workpiece like Figure 1, the surface of the workpiece can be exposed by rubbing it with water sandpaper after grinding (Figure 2). The surface roughness of this chatter is difficult to determine. To this end, the concept of chatter pitting has been introduced, which shows the variation of the chatter length. The circumferential vibration pitch refers to the arc length. Factors that affect the surface characteristics of the workpiece are generally divided into the direction along the grinding speed and its vertical direction. The surface characteristics along the grinding direction will vary with the grinding parameters (such as grinding depth, wheel diameter) and the surface features perpendicular to the grinding direction will vary more with the cutting surface of the grinding wheel And the study of the vibration is more closely related.