The automotive sector is increasingly adopting sustainable practices, emphasizing weight reduction technologies and electrification. This shift necessitates changes in materials and component design, highlighting polymers and fiber-reinforced materials for their emission reduction and recyclability. Polyamide 6, also known as Tecnil, has emerged as a key material due to its lightness, recyclability, and suitability for innovative methods like rapid prototyping and machining for small batches. Grinding is often the preferred method for achieving specific geometries, tolerances, and surface finishes, but there is limited literature on the cutting parameters for grinding polymers, especially polyamides, with conventional abrasive wheels. Due to their lower melting point, polymers require careful selection of cutting parameters, particularly radial depth of cut and workspeed, to manage heat generation and avoid defects like poor finish and thermal damage. This study evaluates the influence of radial depth of cut (15 and 45 μm) and workspeed (2.7 and 7.5 m/min) on the surface roughness of Polyamide 6 using a silicon carbide grinding wheel. Results indicate that all roughness parameters (Ra, Rz, Rq, and Rt) increase with higher radial depths of cut and workspeeds. Increasing the depth of cut from 15 to 45 µm raised Ra by up to 361.29% at 2.7 m/min and 353.54% at 7.5 m/min. Raising workspeed from 2.7 to 7.5 m/min increased Ra by 31.05% for 15 µm and 28.86% for 45 µm. Despite these increases, Ra remained below 1.6 µm, suitable for semi-finished automotive components. Optimal grinding conditions were achieved with a 15 µm depth of cut and 7.5 m/min workspeed, resulting in a minimum Ra of 0.325 µm. These findings guide parameter selection for balancing surface quality and grinding efficiency in Polyamide 6 manufacturing.

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Analysis of Polyamide Roughness After Grinding with Different Workspeeds and Radial Depths of Cut

  • Jamille Kessia Araujo Martins,
  • Marcus Vinícius de Oliveira,
  • Josenilton dos Santos Lopes,
  • Bruno Souza Abrão,
  • Mark James Jackson,
  • Rosemar Batista da Silva

摘要

The automotive sector is increasingly adopting sustainable practices, emphasizing weight reduction technologies and electrification. This shift necessitates changes in materials and component design, highlighting polymers and fiber-reinforced materials for their emission reduction and recyclability. Polyamide 6, also known as Tecnil, has emerged as a key material due to its lightness, recyclability, and suitability for innovative methods like rapid prototyping and machining for small batches. Grinding is often the preferred method for achieving specific geometries, tolerances, and surface finishes, but there is limited literature on the cutting parameters for grinding polymers, especially polyamides, with conventional abrasive wheels. Due to their lower melting point, polymers require careful selection of cutting parameters, particularly radial depth of cut and workspeed, to manage heat generation and avoid defects like poor finish and thermal damage. This study evaluates the influence of radial depth of cut (15 and 45 μm) and workspeed (2.7 and 7.5 m/min) on the surface roughness of Polyamide 6 using a silicon carbide grinding wheel. Results indicate that all roughness parameters (Ra, Rz, Rq, and Rt) increase with higher radial depths of cut and workspeeds. Increasing the depth of cut from 15 to 45 µm raised Ra by up to 361.29% at 2.7 m/min and 353.54% at 7.5 m/min. Raising workspeed from 2.7 to 7.5 m/min increased Ra by 31.05% for 15 µm and 28.86% for 45 µm. Despite these increases, Ra remained below 1.6 µm, suitable for semi-finished automotive components. Optimal grinding conditions were achieved with a 15 µm depth of cut and 7.5 m/min workspeed, resulting in a minimum Ra of 0.325 µm. These findings guide parameter selection for balancing surface quality and grinding efficiency in Polyamide 6 manufacturing.