4 Information requirements

This clause specifies the information requirements for the Additive manufacturing part and build information application module. The information requirements are specified as the Application Reference Model (ARM) of this application module.

NOTE 1  A graphical representation of the information requirements is given in Annex C.

NOTE 2  The mapping specification is specified in 5.1. It shows how the information requirements are met by using common resources and constructs defined or imported in the MIM schema of this application module.

This clause defines the information requirements to which implementations shall conform using the EXPRESS language as defined in ISO 10303-11. The following begins the Additive_manufacturing_part_and_build_information_arm schema and identifies the necessary external references.

4.1 Required AM ARMs

The following EXPRESS interface statements specify the elements imported from the ARMs of other application modules.

EXPRESS specification:

*)
USE FROM Assembly_structure_arm;    --  ISO/TS 10303-1026



USE FROM Construction_geometry_arm;    --  ISO/TS 10303-1131



USE FROM Elemental_geometric_shape_arm;    --  ISO/TS 10303-1004



USE FROM Item_definition_structure_arm;    --  ISO/TS 10303-1345



USE FROM Part_shape_arm;    --  ISO/TS 10303-1807



USE FROM Part_view_definition_arm;    --  ISO/TS 10303-1023



USE FROM Process_plan_arm;    --  ISO/TS 10303-1803



USE FROM Value_with_unit_extension_arm;    --  ISO/TS 10303-1753
(*



NOTE 1   The schemas referenced above are specified in the following part of ISO 10303:

Assembly_structure_arm	ISO/TS 10303-1026
Construction_geometry_arm	ISO/TS 10303-1131
Elemental_geometric_shape_arm	ISO/TS 10303-1004
Item_definition_structure_arm	ISO/TS 10303-1345
Part_shape_arm	ISO/TS 10303-1807
Part_view_definition_arm	ISO/TS 10303-1023
Process_plan_arm	ISO/TS 10303-1803
Value_with_unit_extension_arm	ISO/TS 10303-1753

NOTE 2   See Annex C, Figures C.1, C.2, C.3and C.4 for a graphical representation of this schema.

4.2 ARM type definition

This subclause specifies the ARM type for this application module. The ARM type and definition is specified below.

4.2.1 ampubi_initial_application_domain_enumeration   

EXPRESS specification:

*)
TYPE ampubi_initial_application_domain_enumeration = ENUMERATION BASED_ON initial_application_domain_enumeration WITH
   (additive_manufacturing);
END_TYPE;
(*

Enumerated item definitions:

additive_manufacturing: the application domain is additive_manufacturing.

4.3 ARM entity definitions

This subclause specifies the ARM entities for this module. Each ARM application entity is an atomic element that embodies a unique application concept and contains attributes specifying the data elements of the entity. The ARM entities and definitions are specified below.

4.3.1 Additive_manufacturing_build_direction_element   

An Additive_manufacturing_build_direction_element is a type of Additive_manufacturing_orientation_element that defines the build orientation for processes employing planar layer addition of material.

EXPRESS specification:

*)
ENTITY Additive_manufacturing_build_direction_element
  SUBTYPE OF (Additive_manufacturing_orientation_element);
WHERE
  WR1: EXISTS(SELF\Shape_element.identified_item.axis);
END_ENTITY;
(*

Formal propositions:

WR1: the attribute identified_item inherited from the Additive_manufacturing_orientation_element shall have an Axis_placement_3d.axis defined.

4.3.2 Additive_manufacturing_orientation_element   

EXPRESS specification:

*)
ENTITY Additive_manufacturing_orientation_element
  ABSTRACT SUPERTYPE
  SUBTYPE OF (Part_shape_element);
  SELF\Shape_element.associated_definition : Additive_manufacturing_part_definition;
  SELF\Shape_element.identified_item : Axis_placement_3d;
DERIVE
  SELF\Shape_element.element_name : STRING := 'additive manufacturing build orientation';
END_ENTITY;
(*

Attribute definitions:

associated_definition: an attribute inherited from the Part_shape_element that defines the Additive_manufacturing_part_definition.

identified_item: an attribute inherited from the Part_shape_element that specifies the axes of the initial build orientation.

element_name: an attribute inherited from the Part_shape_element that specifies the element name as 'additive manufacturing build orientation'.

4.3.3 Additive_manufacturing_part_definition   

EXPRESS specification:

*)
ENTITY Additive_manufacturing_part_definition
  SUBTYPE OF (Part_view_definition);
INVERSE
  design_relationship : Geometrical_relationship FOR relating_view;
WHERE
  WR1: SELF\Product_view_definition.initial_context\Initial_view_definition_context.application_domain = ampubi_initial_application_domain_enumeration.additive_manufacturing;
END_ENTITY;
(*

Attribute definitions:

design_relationship: specifies the design part view definition.

Formal propositions:

WR1: the initial application domain shall be additive_manufacturing.

4.3.4 Additive_manufacturing_setup   

An Additive_manufacturing_setup is a type of Assembly_definition that defines the setup for one or more workpieces, the support structures and the build plate. The coordinate system of the build plate shall be the same as the coordinate system of Additive_manufacturing_setup.

EXPRESS specification:

*)
ENTITY Additive_manufacturing_setup
  SUBTYPE OF (Assembly_definition);
  its_origin : Axis_placement_3d;
INVERSE
  its_workpiece_setup : SET[1:?] OF Additive_manufacturing_workpiece_setup FOR relating_view;
  its_support_setup : SET[0:?] OF Additive_manufacturing_support_structure_setup FOR relating_view;
  its_build_plate_setup : Additive_manufacturing_setup_build_plate FOR relating_view;
END_ENTITY;
(*

Attribute definitions:

its_origin: specifies the frame of reference for the location of each workpiece in a setup.

its_workpiece_setup: specifies one or more workpieces to be manufactured.

its_support_setup: specifies the support structures of the workpieces.

its_build_plate_setup: specifies the build plate.

4.3.5 Additive_manufacturing_setup_build_plate   

EXPRESS specification:

*)
ENTITY Additive_manufacturing_setup_build_plate
  SUBTYPE OF (Next_assembly_usage);
  SELF\Product_occurrence_definition_relationship.related_view RENAMED its_build_plate : Build_platform_definition;
  SELF\Product_occurrence_definition_relationship.relating_view : Additive_manufacturing_setup;
INVERSE
  placement : Contextual_shape_representation FOR product_context;
END_ENTITY;
(*

Attribute definitions:

its_build_plate: an attribute inherited from the Product_occurrence_definition_relationship that defines the build platform.

relating_view: an attribute inherited from the Product_occurrence_definition_relationship that defines the setup.

placement: specifies the transformation allowing the placement of the build platform in the setup.

4.3.6 Additive_manufacturing_support_structure   

EXPRESS specification:

*)
ENTITY Additive_manufacturing_support_structure
  SUBTYPE OF (Part_view_definition);
WHERE
  WR1: SELF\Product_view_definition.initial_context\Initial_view_definition_context.application_domain = ampubi_initial_application_domain_enumeration.additive_manufacturing;
END_ENTITY;
(*

Formal propositions:

WR1: the initial application domain shall be additive_manufacturing.

4.3.7 Additive_manufacturing_support_structure_setup   

EXPRESS specification:

*)
ENTITY Additive_manufacturing_support_structure_setup
  SUBTYPE OF (Next_assembly_usage);
  SELF\Product_occurrence_definition_relationship.related_view RENAMED its_support : Additive_manufacturing_support_structure;
  SELF\Product_occurrence_definition_relationship.relating_view : Additive_manufacturing_setup;
INVERSE
  placement : Contextual_shape_representation FOR product_context;
END_ENTITY;
(*

Attribute definitions:

its_support: an attribute inherited from the Product_occurrence_definition_relationship that define the support structures.

relating_view: an attribute inherited from the Product_occurrence_definition_relationship that define the setup.

placement: specifies the transformation allowing the placement of the support structures in the setup.

4.3.8 Additive_manufacturing_workpiece_setup   

EXPRESS specification:

*)
ENTITY Additive_manufacturing_workpiece_setup
  SUBTYPE OF (Next_assembly_usage);
  SELF\Product_occurrence_definition_relationship.related_view RENAMED its_workpiece : Additive_manufacturing_part_definition;
  SELF\Product_occurrence_definition_relationship.relating_view : Additive_manufacturing_setup;
INVERSE
  placement : Contextual_shape_representation FOR product_context;
END_ENTITY;
(*

Attribute definitions:

its_workpiece: an attribute inherited from the Product_occurrence_definition_relationship that defines the part that will be used as workpiece.

relating_view: an attribute inherited from the Product_occurrence_definition_relationship that defines the setup.

placement: specifies the transformation allowing the placement of the workpiece in the setup.

4.3.9 Additive_manufacturing_workplan   

EXPRESS specification:

*)
ENTITY Additive_manufacturing_workplan
  SUBTYPE OF (Executable);
  its_setup : Additive_manufacturing_setup;
END_ENTITY;
(*

Attribute definitions:

its_setup: defines the setup for the Additive_manufacturing_workplan.

4.3.10 Additive_manufacturing_x_direction_element   

An Additive_manufacturing_x_direction_element is a type of Additive_manufacturing_orientation_element that defines the part orientation relative to the front of the build surface.

EXPRESS specification:

*)
ENTITY Additive_manufacturing_x_direction_element
  SUBTYPE OF (Additive_manufacturing_orientation_element);
WHERE
  WR1: EXISTS(SELF\Shape_element.identified_item.ref_direction);
END_ENTITY;
(*

Formal propositions:

WR1: the attribute identified_item inherited from the Additive_manufacturing_orientation_element shall have an Axis_placement_3d.ref_direction defined.

4.3.11 Build_platform_definition   

A Build_platform_definition is a type of Product_view_definition that defines a build platform. The coordinate system shall be oriented so that the plane of build platform is in the xy plane at z value 0. And the z direction points in the direction above the build platform into the build volume.

EXPRESS specification:

*)
ENTITY Build_platform_definition
  SUBTYPE OF (Product_view_definition);
  build_volume_representation : Build_volume;
  build_platform_representation : OPTIONAL Geometric_model;
END_ENTITY;
(*

Attribute definitions:

build_volume_representation: defines the representation of the build volume.

build_platform_representation: defines the geometric representation of the build platform. For an additive manufacturing process, the build platform is defined in ISO/ASTM 52921. The value of this attribute need not be specified.

4.3.12 Build_volume   

EXPRESS specification:

*)
ENTITY Build_volume
  ABSTRACT SUPERTYPE OF (ONEOF (Rectangular_build_volume,
                                Circular_build_volume))
  SUBTYPE OF (Geometric_model);
  its_origin : Axis_placement_3d;
END_ENTITY;
(*

Attribute definitions:

its_origin: specifies the frame of reference for the location and the orientation of the build volume.

4.3.13 Circular_build_volume   

EXPRESS specification:

*)
ENTITY Circular_build_volume
  SUBTYPE OF (Build_volume);
  diameter : Length_data_element;
  height : OPTIONAL Length_data_element;
END_ENTITY;
(*

Attribute definitions:

diameter: defines the diameter of the build platform.

height: defines the height of the build platform. The value of this attribute need not be specified.

4.3.14 Executable   

NOTE    The term “executable” is defined by ISO 10303-238 and is reused here for reasons of interoperability.

EXPRESS specification:

*)
ENTITY Executable
  SUBTYPE OF (Process_operation_definition);
END_ENTITY;
(*

4.3.15 Rectangular_build_volume   

A Rectangular_build_volume is a type of Build_volume that is rectangular.

EXPRESS specification:

*)
ENTITY Rectangular_build_volume
  SUBTYPE OF (Build_volume);
  x : Length_data_element;
  y : Length_data_element;
  z : OPTIONAL Length_data_element;
END_ENTITY;
(*

Attribute definitions:

x: defines the size of the build platform along the X direction.

y: defines the size of the build platform along the Y direction.

z: defines the size of the build platform along the Z direction. The value of this attribute need not be specified.

4.4 ARM subtype constraint definition

This subclause specifies the ARM subtype constraint for this module. The subtype constraint places a constraint on the possible super-type / subtype instantiations. The ARM subtype constraint and definition is specified below.

4.4.1 Additive_manufacturing_part_view_subtypes   

The Additive_manufacturing_part_view_subtypes constraint specifies a constraint that applies to instances of Part_view_definition and enforces the rule that its subtypes Additive_manufacturing_part_definition and Additive_manufacturing_support_structure are exclusive.

EXPRESS specification:

*)
SUBTYPE_CONSTRAINT Additive_manufacturing_part_view_subtypes FOR Part_view_definition;
  ONEOF (Additive_manufacturing_part_definition,
         Additive_manufacturing_support_structure);
END_SUBTYPE_CONSTRAINT;
(*

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