微细铣削加工中表面粗糙度横向分布的试验研究

Experimental Study on Transverse Distribution of Surface Roughness in Micro Milling

微细铣削加工零件表面粗糙度对其使用性能具有重要影响,为了研究微细铣削中加工表面粗糙度在横向不同位置的分布规律,本文首先分析了加工过程中由于刀具旋转引起的瞬时切削厚度变化,并基于最小切削厚度现象分析了该变化对材料去除方式的影响,随后进行微细铣削试验,测量了槽底不同横向位置处的表面粗糙度。结果表明,粗糙度在不同横向位置分布曲线呈W形状,不同横向位置的粗糙度W形状分布随每齿进给量和铣削深度的增加越来越明显,铣削速度对不同横向位置粗糙度分布几乎没有影响。

The surface roughness of micro milling parts has a great effect on its performance.To study the distribution of surface roughness in different transverse positions during micro milling.In this paper,the instantaneous cutting thickness change caused by tool rotating during machining process is analyzed,and the influence on the material removal mode is analyzed based on the minimum cutting thickness.By micro milling experiments,surface roughness at different transverse positions of the groove bottom is measured.The results show that the distribution curve of surface roughness in different transverse positions presents the W shape.With the increase of feed rate and milling depth,the W shape distribution of surface roughness at different transverse positions becomes increasingly obvious,and the milling speed has little effect on surface roughness distribution at different transverse positions.