Ametek Surtronic 25, Руководство пользователя

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Chapter 1
Surtronic S25
Introduction to Surface Texture
terminology and definitions
Surface Texture Definitions
Every components surface has some form of texture which varies
according to its structure and the way it has been manufactured.
These surfaces can be broken down into three main categories:
Surface roughness, Waviness and Form. In order to predict a
components behaviour during use or to control the manufacturing
process, it is necessary to quantify these surface characteristics.
This is done by using surface texture parameters.
Surface texture parameters can be separated into three basic types:
Amplitude, Spacing and Hybrid.
Amplitude Parameters.
are measures of the vertical
characteristics of the surface deviations.
Spacing Parameters.
are measures of the horizontal character-
istics of the surface deviations.
Hybrid Parameters.
are combinations of spacing and
amplitude parameters.
Mean Line.
the mean line is a least squares line of nominal form
fitted through the primary profile where the areas of the profile
above and below this line are equal and kept to a minimum
separation. Profile filters as detailed in ISO11562 define the mean
lines for the roughness and waviness profiles.
Cut-off.
A cut-off length (or sampling length) is a filter that uses
either electronic (2CR) or mathematical (Gaussian) means to
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