22 orientation tolerance tolerance no 2 surface gauge

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Unformatted text preview: ne. This gauge is completely free in displacement compared to the part : Figure 2; Interpretation of a form tolerance (flatness). 2.2 Orientation tolerance (tolerance No. 2): Surface-gauge - Degree of freedom of a gauge Now the tolerance zone is "dependent" in orientation on a theoretical datum surface (here a plane). This datum surface is like a perfect plane which must be fitted with the "bottom" face of the part. The orientation tolerance can be interpreted as a virtual gauge, composed of one plane (surface-gauge) and a tolerance zone (zone-gauge). The zone-gauge is linked to the plane-gauge but can move in translation in the three directions of the space. The Surfacegauge plane is fitted with the "bottom" face of the part. Then the zone-gauge can move in translation to try to contain the "top" face : Figure 3; Interpretation of an orientation tolerance (parallelism). 2.3 Position tolerance for a pattern of features (tolerance No. 3) and maximum mate...
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