Correlation between the topography of the tool's worn surface and the resulting workpiece roughness in the milling process of the Inconel 718

• DOI: 10.22533/at.ed.8262109022

• Palavras-chave: Surface topography, Cutting forces, Tool wear, Inconel 718.

• Keywords: Surface topography, Cutting forces, Tool wear, Inconel 718.

• Abstract:

  Topographic characterization techniques are widely used for functional control of surface wear. The use of scanning electron microscopy (SEM) provides high-resolution images compared to optical systems that use the interaction of the visible light with the sample surface, that optimizes topographic characterization calculations. This work uses SEM in conjunction with image processing techniques to evaluate and correlate the topography from the wear scars at the rake face of cemented carbide tools and the resulting surface topography of an Inconel 718 workpiece in the face milling process. To study the influence of tool wear, tools with different flank wear levels (from 0.1 to 0.4 mm) artificially generated by electric discharge machining (EDM) were used. The trials were carried out under finishing, moderate and rough machining conditions, and under dry, flood and minimum lubrication (MQL) conditions. Images acquired by SEM (using secondary electrons) of the worn rake face of the cutting tools were used for calculating the topographic parameters. The results show that the topography of the wear marks on the cutting tool is related to the results of the topography of the workpieces. This innovative approach suggests that if tool wear mechanisms can be characterized by its roughness parameters, these results could be used to model the resulting roughness at the workpiece, with the reciprocal being also true.

• Número de páginas: 14