When talking about measuring a surface, it is likely that it’s roughness is a consideration.
You can also gain an overview of quality assurance for surfaces on the following page.
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What is surface roughness?
Roughness is a component of surface texture, and is irregularities on a surface resulting from unevenness. These so-called surface deviations arise from the effect a machining or finishing process has on the surface. They are categorised into course and fine. Shape and position deviations are categorised as course form, waviness and roughness are categorised as fine form:
- Shape: Deviations in long periods or non-cyclical deviations
Possible causes: Error in the in the machine tool axis, incorrect clamping of the workpiece, uneven wear and tear.
- Waviness: Surface structure with longer intervals of irregularities.
Possible causes: Vibration in the machine tool or workpiece. Tooling problems during the manufacturing process
- Roughness: Irregularities with shorter intervals
Possible causes: Cutting tool markings, grinding wheel/ abrasive grain size.
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