基于虚拟加工的主轴跳动对表面粗糙度的作用规律分析

Rule Analysis of Spindle Runout Effected on Surface Roughness Based Virtual Processing

机床主轴的跳动误差是影响工件表面加工质量的重要因素,但其作用规律尚未被掌握。以车削外圆表面为例,提出了一种基于虚拟工件表面的粗糙度预测分析方法。首先,建立刀具模型和主轴跳动的数学模型,利用Matlab的计算与绘图功能,得到在这2个因素作用下的虚拟工件表面;然后,利用高斯滤波原理对工件表面轮廓进行处理并得到粗糙度评定基准;最后,完成对表面粗糙度的数字化预测。采用这种方法,可以定量分析主轴跳动对表面粗糙度的作用规律。

The spindle runout is an significant factor affecting the surface quality of workpiece, but its action rule has not been mastered now. Taking the turning cylinder surface as an example, an forecast analysis way of surface roughness based on the virtual workpiece surface was proposed. The mathematical model included tool and spindle runout was established at the first. Using the calculating and plotting of MATLAB, the virtual surface affected by this two factors was built. Using the Gauss filter principle to deal with this surface, and the evaluation criteria of surface roughness was obtained. At last, the digital prediction of surface roughness was achieved. By this method, the quantitative rule of the spindle runout affecting surface roughness may be analyzed.