铍铜球刀数控铣削试验研究及工艺参数优化

Experimental Research on Ball-end Cutters Milling for Beryllium Copper and Optimization of Cutting Parameters

铍铜是一种贵金属,其材料硬度高且散热性能特别强,因此在复杂精密塑料模具中通常被用来制作各种小型镶件。由于铍铜与普通黄铜或紫铜的力学特性差异巨大,它们的切削性能差异也非常明显。为了深入研究铍铜的数控切削特性,利用正交试验方法设计了铍铜球形铣刀铣削试验,基于试验数据并利用最小二乘多元线性回归方法,推导并求解出铍铜表面粗糙度的数学模型。利用最优化设计方法和MATLAB优化工具箱,基于粗糙度预测模型,针对实际的铍铜铣削项目,优选了数控加工工艺参数,对实际生产有一定的参考作用。

Beryllium copper is a kind of precious metal, with high hardness and strong cooling performance. Therefore, it is usually used to make a variety of small inserts in the complex poastic mold. Because the mechanical properties of the beryllium copper are very different from ones of the common copper, their cutting performances are different too. Based on experiments of ball-end cutters milling for beryllium copper, the prediction model of surface roughness is established by use of regression analysis method of least square. Based on its model, optimal cutting parameters can be obtained in the actual milling project by use of optimization tool-box of MATLAB software.