注塑成型模具硬态铣削表面粗糙度研究

采用AITiN涂层硬质合金球头立铣刀对4Cr5MoSiV1钢的注塑成型模具进行硬态高速铣削研究,通过多因素法正交试验,利用多元线性回归分析法建立模具硬态铣削的表面粗糙度预报模型,经过现场加工实践检验其准确性.分析切削参数对模具零件的表面粗糙度的影响.研究结果表明:在高转速、小切深及合适的进给速度下,模具加工表面质量好,为优化模具硬态铣削的切削参数和加工表面质量的控制提供了较好的依据.

Surface roughness of plastic mold parts in finish hard milling

Taking the hard milling of the plastic mold parts (cavity) as an example, using a hardened 4CrSMoSiV1 steel and AITiN coated carbide ball-end-milling tool, the empirical model of surface roughness was carried out with regressing analysis method and a multi-factorial orthogonal test, and the roughness of hard milling of the mold parts was predicted by the proposed model. The results show that better surface roughness can be attained by using higher spindle speed, appropriate feed rate, lower axial and radial depth of milling parameters, which provides the foundation for selecting cutting parameters properly and controlling surface quality of die and mold manufacture.