ISO 10303-214:2010(E)

Figure — Arrowleft Figure — Clause 4 Figure — Arrowright

4.2.48 Boss_feature

A Boss_feature is an enclosed shape that protrudes from a surface in the direction of the sweep path. The intersection of the Boss_feature and the surface may, but need not, have radius shaped blend between them.

A Boss_feature is a type of Process_feature_in_solid.

Each Boss_feature is a Circular_boss, a Rectangular_boss, or a General_boss.

The data associated with a Boss_feature are the following:

4.2.48.1 base_radius

The base_radius specifies a radius shape blend between a Boss_feature and the surrounding surface at its base. The fillet is applied after the placement of the Boss_feature on the part and after a potential application of a taper.

For the creation of a fillet, the following rules apply:

If Rf is the fillet radius to be created at the bottom of the boss and C the path along which the centre of a sphere S defining the fillet is moving then

See Boss_feature to feature_parameter for the application assertion.

The base_radius need not be specified for a particular Boss_feature.

4.2.48.2 boss_height

The boss_height specifies the Linear_path that is used to sweep the Closed_profile.

See Boss_feature to linear_path for the application assertion.

4.2.48.3 boundary

The boundary specifies the Closed_profile_usage that references the Closed_profile, which defines the cross section of the Boss_feature.

NOTE The different types of Boss_feature constrain the usage of the boundary further.

See Boss_feature to closed_profile_usage for the application assertion.

4.2.48.4 taper

The taper specifies a variation of the size of the Boss_feature. If present, the variation shall be specified either by an Angle_taper or by a Directed_taper or, in the case of a Circular_boss, by a Diameter_taper, or an Angle_taper. If no taper is specified, the cross section at the start of the sweep path and at the end of the sweep path shall be of identical shape.

See Boss_feature to angle_taper, Boss_feature to diameter_taper, and Boss_feature to directed_taper for the application assertions.

The taper need not be specified for a particular Boss_feature.

If present, there shall be exactly one object that defines the taper for a Boss_feature.

4.2.48.5 top_condition

The top_condition specifies the shape at the top of the Boss_feature.

See Boss_feature to boss_top_condition for the application assertion.



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