1.3.25 Envelope, Actual Mating
envelope, actual mating: this envelope is outside the material. A similar perfect feature(s) counterpart of smallest size that can be contracted about an external feature(s) or largest size that can be expanded within an internal feature(s) so that it coincides with the surface(s) at the highest points. Two types of actual mating envelopes — unrelated and related — are described in paras. 1.3.25.1 and 1.3.25.2.
1.3.25.1 Unrelated Actual Mating Envelope.
unrelated actual mating envelope: a similar perfect feature(s) counterpart expanded within an internal feature(s) or contracted about an external feature(s), and not constrained to any datum(s). See Fig. 1-1.
1.3.34 Feature-Relating Tolerance Zone Framework
feature-relating tolerance zone framework (FRTZF): the tolerance zone framework(s) that controls the basic relationship between the atures in a pattern with that framework constrained in rotational degrees of freedom relative to any referenced datum features. |
|