ISO 10303-214:2010(E)

Figure — Arrowleft Figure — Clause 4 Figure — Arrowright

4.2.398 Process_feature_in_solid

A Process_feature_in_solid is a feature that is defined to be applied to a solid part. Each single Process_feature_in_solid (i.e. not a Compound_feature_in_solid) is specified as a volume defined by a Profile and a sweep Path; depending on the type of Process_feature_in_solid this volume is either added to or subtracted from the part.

In the case where the Process_feature_in_solid is defined to be applied as an Included_feature the feature itself as well as the Path and the Profile shall be defined in the coordinate space of the part. In the case where the Process_feature_in_solid is defined to be applied as a Placed_feature the Process_feature_in_solid as well as the Profile shall be defined in their own local coordinate spaces; the Path shall be defined in the feature coordinate space. The spatial constraints between profile, feature, and part shall be specified by geometric Transformation objects.

NOTE 1 The latter allows to re-use feature definitions for multiple occurrences of the feature.

In the case, where the Process_feature_in_solid is defined by a profile that is swept along a path the following rules apply:

Profiles that are swept along a path shall be oriented normal to the path at any position along the path. The geometric transformation placing a profile shall be in a way that the profile plane coincides with the plane normal to the path at the path start or end respectively.

Profiles that are swept along a path shall not twist along the path; no twisting in this context means that the x-axis of the profile is always parallel to the plane that is the x-z-plane of the 'first occurrence' of the profile. The z-axis of the profile is always tangent to the sweep path.

If C1 is the path, C2 the profile, P any point on C1, T the tangent of C1 at P, N the normal of C1 at P, V the axis defined by P and N, Rc the curvature radius of C1 at P, C3 the curve resulting from a) positioning of C2 in the coordinate space of the feature, b) sweeping of the curve, resulting from the previous step, along C1 up to P, c) projection of the curve, resulting from the previous step, on the plane defined by P, T, and N, and Dmax the maximum coordinate of C3 along V then

A Process_feature_in_solid is a type of Feature_definition.

Each Process_feature_in_solid is a Pocket_feature, a Rib_feature, a Round_hole, a Compound_feature_in_solid, a Boss_feature, or a Slot_feature.

The data associated with a Process_feature_in_solid are the following:

location_and_orientation

The location_and_orientation specifies the Axis_placement that defines the location and orientation of the feature. The location_and_orientation is specified for the purpose of evaluation by manufacturing systems, which use the information in order to determine various machining parameters. For all types of Process_feature_in_solid, except for Compound_feature_in_solid, the location_and_orientation shall reference the same instance of Axis_placement as the Profile it refers to as one of its parameters.

NOTE 2 The use of the location_and_orientation for Compound_feature_in_solid is defined in that particular application object.

See process_feature_in_solid to axis_placement for the application assertion.



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