ISO 4288:1996 pdf download.Geometrical Product Specifications (GPS) - Surface texture: Profile method - Rules and procedures for the assessment of surface texture
1 Scope
ISO 4288:1996 pdf download specifies the rules for comparison of the measured values with the tolerance limits for surface texture parameters defined in
ISO 4287, ISO 12085, ISO 13565-2 and ISO 13565-3.
It also specifies the default rules for selection of cutoff wavelength, Ac, for measuring roughness profile parameters according to ISO 4287 by using stylus instruments according to ISO 3274.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 1302:1992, Technical drawings — Method of mdicating surface texture.
ISO 3274:1996, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Nominal characteristics of contact (stylus) instruments.
ISO 4287:1996, Geometrical Product Specifications (GPS)一Surface texture: Profile method - Terms,definitions and parameters of surface texture.
ISO 12085:1996. Geometrical Product Specifications (GPS)一Surface texture: Profile method一Motif par-ameters.
ISO 13565-1:1996，Geometrical Product Specifi-cations (GPS)一Surface texture: Profile method; sur-faces having stratified functional properties - Part 1:Filtering and general measurement conditions.
ISO 13565-2:1996，Geometrical Product Specifi-cations (GPS)一Surface texture: Profile method; sur-faces having stratified functional properties - Part 2:Height characterization using the linear material ratio curve.
ISO 13565-3:- 1), Geometrical Product Specifications (GPS)一Surface texture: Profile method; surfaces having stratified functional properties一Part 3: Height characterization using the material probability curve.
ISO 14253-1: 一1), Geometrical Product Specifications (GPS)一Inspection by measurement of workpieces and measuring instruments一Part 1: Decision rules for proving conformance or non-conformance with specifications.
5.1 Areas on the feature to be inspected
The surface texture of the workpiece under inspection can appear homogeneous or be quite different over various areas. This can be seen by visual examination of the surface. In cases where the surface texture appears homogeneous, parameter values determined over the entire surface shall be used for comparison with the requirements specified on the drawings or in the technical product documentation.
If there are separate areas with obviously different surface texture, the parameter values which are de-termined on each area shall be used separately for comparison with the requirements specified on the drawings or in the technical product documentation.
For requirements specified by the upper limit of the parameter, those separate areas of the surface shall be used which appear to have the maximum par-ameter value.ISO 4288 pdf download.