Surface roughness analysis after laser assisted machining of hard to cut materials

14th International Conference on Metrology and Properties of Engineering Surfaces

Przestacki, D.^1 ; Jankowiak, M.^1

Poznan University of Technology, Faculty of Mechanical Engineering, Piotrowo 3, 60-965 Poznan, Poland^1

关键词: 3-D surface topography;    Conventional machining;    Cubic boron nitride (cBN);    Laser assisted machining;    Polycrystalline diamonds;    Power spectrum density;    Silicon nitride ceramics;    Surface roughness parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/483/1/012019/pdf
DOI  :  10.1088/1742-6596/483/1/012019

来源: IOP

【 摘 要 】

Metal matrix composites and Si3N4 ceramics are very attractive materials for various industry applications due to extremely high hardness and abrasive wear resistance. However because of these features they are problematic for the conventional turning process. The machining on a classic lathe still requires special polycrystalline diamond (PCD) or cubic boron nitride (CBN) cutting inserts which are very expensive. In the paper an experimental surface roughness analysis of laser assisted machining (LAM) for two tapes of hard-to-cut materials was presented. In LAM, the surface of work piece is heated directly by a laser beam in order to facilitate, the decohesion of material. Surface analysis concentrates on the influence of laser assisted machining on the surface quality of the silicon nitride ceramic Si3N4 and metal matrix composite (MMC). The effect of the laser assisted machining was compared to the conventional machining. The machining parameters influence on surface roughness parameters was also investigated. The 3D surface topographies were measured using optical surface profiler. The analysis of power spectrum density (PSD) roughness profile were analyzed.