【摘要】 影响微尺度铣削加工质量的因素中,工艺参数相对于其他动态变化的因素是可控的。针对微尺度铣削工程材料黄铜H68,基于所开发的微尺度铣削机床,应用Taguchi方法,通过实验的方法,以表面粗糙度作为加工质量评价指标,对工艺参数展开了研究。通过对实验结果的极差分析与方差分析,确定了3个关键工艺参数轴向切深、径向切深和每齿进给量对表面粗糙度的影响趋势。结果表明:径向切深对于微尺度铣削黄铜H68影响最大,其次是每齿进给量与轴向切深。本研究对于微尺度铣削类似的延展性材料提供了方法与工艺参考。更多还原

【Abstract】 Process parameters in microcutting are controllable comparing to other dynamically varied factors affecting the micromachining processes. Based on the Taguchi method,the three key process parameters of the axial depth of cut,the radial depth of cut,and the feed in micromilling of very important engineering material brass H68 are experimentally studied in an orthogonal way on a micromilling machine tool with sub-micron accuracy.The achieved surface roughness in micromilling experiments are used as the evaluation criterion. The extreme difference analysis and the variance analysis of the experimental results have identified the affecting tendencies of the three key process parameters on the final micromilling results. It turns out that the radial depth of cut affects the finished surface roughness most greatly in micromilling of brass H68. The feed and the radial depth of cut have significance on the surface roughness.更多还原