ISO 10303-214:2010(E)

Figure — Arrowleft Figure — Clause 4 Figure — Arrowright

4.2.227 Form_feature_in_panel

A Form_feature_in_panel is the definition of a local modification in the shape of a panel. This modification consists of a base boundary on the panel surface and of a target face that is a result of stamping the area that is enclosed by the base boundary.

The Form_feature_in_panel is specified either by two Closed_profile_usage objects or by a Closed_profile_usage and an Angle_specification. The use of two Angle_specification objects is not valid. In the case of a Form_feature_in_panel that has its base boundary defined by a Closed_profile, the placement of the feature shall be in a way that the base profile lies on the surface of the original panel or as close as possible if the surface is not planar.

NOTE In order to achieve intersection of the feature wall and the base surface it may be necessary to extend the wall linearly towards the base surface.

The wall of the feature is a ruled surface. In the case of two profiles defining the feature, the following rule applies: If Pb is a point on the base, Pt the corresponding point on the target, Tb the tangent to the base profile in Pb, and V the surface normal in Pb or the punch direction respectively, then the scalar product
Figure — Formula01
shall evaluate to zero. If no punch direction is specified, the surface normal shall be used for the definition of the ruled surface. In the case of one profile and an angle the rule for the ruled surface is implicit.

A Form_feature_in_panel is a type of Process_feature_in_panel.

The data associated with a Form_feature_in_panel are the following:

4.2.227.1 base_boundary_defined_by

The base_boundary_defined_by specifies either a Closed_profile_usage on the panel surface, or an Angle_specification that defines the base boundary by applying an angle to the target boundary.

See form_feature_in_panel to angle_specification and form_feature_in_panel to closed_profile_usage for the application assertions.

There shall be exactly one object that defines the base_boundary_defined_by for a Form_feature_in_panel.

4.2.227.2 base_radius

The base_radius specifies the blend of the edge where the Form_feature_in_panel meets the panel surface. The sum of the values of the base radius and target radius shall not exceed the minimum distance between the profile defining the base of the feature and the profile defining the target of the feature.

See form_feature_in_panel to feature_parameter for the application assertion.

4.2.227.3 feature_type

The feature_type specifies the kind of Form_feature_in_panel that results from the application of the specified parameters.

The following values shall be used:

NOTE Usually a pocket in panel and a boss in panel don't differ in their shape but only in the function they perform.

EXAMPLE Figure 33 shows an example for a Form_feature_in_panel of feature_type 'stairstep'.

4.2.227.4 target_boundary_defined_by

The target_boundary_defined_by specifies either a Closed_profile_usage that corresponds to the boundary of the target face, or an Angle_specification that defines the target boundary by applying an angle to the base boundary.

See form_feature_in_panel to angle_specification and form_feature_in_panel to closed_profile_usage for the application assertions.

There shall be exactly one object that defines the target_boundary_defined_by for a Form_feature_in_panel.

4.2.227.5 target_face

The target_face specifies the Surface or the Shell that defines that end of the Form_feature_in_panel that results from its application.

The geometric elements representing the target shall be defined in the same Cartesian_coordinate_space as the Form_feature_in_panel. In the case of a Form_feature_in_panel defined by a base profile and an Angle_specification, the target_face shall also be specified.

NOTE If the target_face is not specified explicitly, it is defined implicitly as a flat face bounded by the target profile.

See form_feature_in_panel to shell and form_feature_in_panel to surface for the application assertions.

The target_face need not be specified for a particular Form_feature_in_panel.

If present, there shall be exactly one object that defines the target_face for a Form_feature_in_panel.

4.2.227.6 target_radius

The target_radius specifies the blend of the edge where the feature walls meet the target face. The sum of the values of the base radius and target radius shall not exceed the minimum distance between the profile defining the base of the feature and the profile defining the target of the feature.

See form_feature_in_panel to feature_parameter for the application assertion.

© ISO 2010 — All rights reserved