微金字塔阵列结构的精密铣削加工技术研究

Research on Precision Milling Technology for Micro Pyramid Array Structures

为提升金属模具表面微结构的加工精度与效率,探讨在五轴联动加工中心进行精密铣削加工的工艺参数,选取铍铜材料进行微金字塔结构的精密铣削加工,分析切削加工3个关键工艺参数——主轴转速、进给速度以及轴向每刀切削深度对微金字塔阵列结构加工精度的影响规律。结果表明,轴向每刀切削深度对微结构加工质量影响最大,其次是主轴转速,而进给速度对加工质量影响不明显。因此,提出优先选择较小的轴向每刀切削深度分层进给、根据刀具及工件材料性能设定合适的主轴转速、采用较快的进给速度等优化加工参数的策略,以提升金属模具表面微结构的加工质量和效率。

To enhance the machining accuracy and efficiency of microstructures on metal mold surfaces,this paper investigates the process parameters for precision milling on a five-axis machining center.Beryllium copper material was selected for the precision milling of micro pyramid structures.The study analyzes the effects of three key cutting parameters—spindle speed,feed rate,and axial depth of cut per tooth—on the machining accuracy of the micro pyramid array structures.The results indicate that the axial depth of cut per tooth has the most significant impact on microstructure machining quality,followed by spindle speed,with feed rate showing a negligible effect.Consequently,the study proposes an optimized strategy for process parameters,recommending the use of smaller axial depths of cut per tooth with layered feeding,appropriate spindle speeds based on tool and workpiece material properties,and faster feed rates.This approach aims to improve the quality and efficiency of microstructure machining on metal mold surfaces.