金刚石涂层微铣刀的铣削加工试验

为了掌握金刚石涂层对其铣削性能的影响，针对直径为50 μm级的硬质合金微铣刀，进行了金刚石涂层与未涂层硬质合金微铣刀具微槽铣削试验。通过使用线电极电火花磨削技术制备出直径为50 μm级的D形微铣刀,采用金刚石涂层和未涂层刀具在纯铜工件上开展微槽铣削工艺试验；使用白光干涉仪、超景深显微镜等仪器来观测微槽表面形貌、粗糙度等随铣削距离变化的规律，分析金刚石涂层对硬质合金微铣刀铣削加工质量的影响。结果表明：采用金刚石涂层刀具加工的微槽具有较少的毛刺，表面粗糙度值约为未涂层刀具铣削的粗糙度值的1/2，并且能够在一定距离内保持稳定的槽宽、粗糙度值和侧面形貌。

Milling Process Tests of Diamond Coated Micro-milling Cutters

In order to understand the effects of diamond coating on the milling performances of carbide micro-milling cutters with diameter of 50 μm, the micro-groove milling experiments of diamond coated and uncoated tools were carried out. Firstly, the D-shaped micro-milling cutter with diameter of 50 μm was prepared by using WEDG. Then, the micro-groove milling process experiments were carried out on pure copper workpieces with diamond coated and uncoated tools; Changes of the surface morphology and roughness of micro-grooves with milling distance were observed by white-light interferometer and ultra-depth-of-field microscope, and the effects of diamond coating on the milling processes of cemented carbide micro-milling cutters were analyzed. The results show that the micro-groove processed with diamond coating tools has less burr, the surface roughness value is twice lower than that milled with uncoated tools, and stable groove width, roughness value and side morphology may maintain within a certain distance.