<p>Additive manufacturing (AM) provides design flexibility and cost efficiency but often faces challenges in achieving the dimensional accuracy and surface finish required for microfeatures such as microchannels and microholes. Integrating AM with precision micromilling offers a promising route to overcome these limitations. The machinability of Onyx, a nylon–carbon fiber composite, created through AM and subsequently micromilled to create microchannels is investigated in this study. Cutting force and surface topography analyses reveal that higher layer heights reduce cutting forces at lower spindle speeds, while higher spindle speeds and feed rates improve surface quality and minimize burr formation. Characteristic chip morphologies, including broken fibers and feathery burrs, highlight the interaction between AM layer structure and micromilling behavior.</p>

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Micromilling as a Post-Processing Technique for Additively Manufactured Nylon–Carbon Fiber Composites: An Experimental Study

  • Nitesh Kumar,
  • Shaik Mushraf Parvez,
  • Rinku K. Mittal

摘要

Additive manufacturing (AM) provides design flexibility and cost efficiency but often faces challenges in achieving the dimensional accuracy and surface finish required for microfeatures such as microchannels and microholes. Integrating AM with precision micromilling offers a promising route to overcome these limitations. The machinability of Onyx, a nylon–carbon fiber composite, created through AM and subsequently micromilled to create microchannels is investigated in this study. Cutting force and surface topography analyses reveal that higher layer heights reduce cutting forces at lower spindle speeds, while higher spindle speeds and feed rates improve surface quality and minimize burr formation. Characteristic chip morphologies, including broken fibers and feathery burrs, highlight the interaction between AM layer structure and micromilling behavior.