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AI InsightExperimental studies revealed that there was no significant change in XRD patterns and hardness values during the production process, but quite significant differences were observed in surface roughness and SEM images.
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Abstract
In this study, the surface roughness, hardness, and microstructure of polyamide (PA6), a widely used material in the manufacturing industry, were compared with machined PA6 under different machining parameters on a sliding automatic lathe. A model used in the automotive industry was selected as a sample, and the experiments were conducted in a laboratory environment at room temperature. The cutting tool and coolant were set as constant parameters throughout the production process. Surface roughness and Shore-D hardness measurements were first applied to non-machined samples. The same measurements were also applied to samples machined on a sliding automatic lathe at different speeds and feed rates. Both non-machined and machined samples were then characterized by scanning electron microscope (SEM) images and surface XRD patterns. The surface roughness of untreated PA6 samples was found to be 0.20 ± 0.02, while it varied between 1.40 and 1.28 for samples machined at low feed rates and between 8.42 and 8.27 for samples machined at high feed rates. The hardness values of the untreated PA6 sample were found to be 78 ± 1 Shore-D, while the hardness values of the treated samples ranged from 71.17 to 75.17. Experimental studies revealed that there was no significant change in XRD patterns and hardness values during the production process, but quite significant differences were observed in surface roughness and SEM images.