4 Information requirements

This clause specifies the information requirements for the Assembly technology 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 Assembly_technology_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 Feature_and_connection_zone_arm;    --  ISO/TS 10303-1671



USE FROM Generic_material_aspects_arm;    --  ISO/TS 10303-1681



USE FROM Physical_component_feature_arm;    --  ISO/TS 10303-1721



USE FROM Product_view_definition_reference_arm;    --  ISO/TS 10303-1823



USE FROM Requirement_assignment_arm;    --  ISO/TS 10303-1233
(*



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

Feature_and_connection_zone_arm	ISO/TS 10303-1671
Generic_material_aspects_arm	ISO/TS 10303-1681
Physical_component_feature_arm	ISO/TS 10303-1721
Product_view_definition_reference_arm	ISO/TS 10303-1823
Requirement_assignment_arm	ISO/TS 10303-1233

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

4.2 ARM type definitions

This subclause specifies the ARM types for this application module. The ARM types and definitions are specified below.

4.2.1 at_external_identification_item   

The at_external_identification_item type is an extension of the external_identification_item type. It adds the data type Assembly_bond_definition to the list of alternate data types.

EXPRESS specification:

*)
TYPE at_external_identification_item = SELECT BASED_ON external_identification_item WITH
   (Assembly_bond_definition);
END_TYPE;
(*

4.2.2 at_material_item_select   

The at_material_item_select type is an extension of the material_item_select type. It adds the data type Assembly_bond_definition to the list of alternate data types.

EXPRESS specification:

*)
TYPE at_material_item_select = SELECT BASED_ON material_item_select WITH
   (Assembly_bond_definition);
END_TYPE;
(*

4.2.3 at_property_assignment_select   

The at_property_assignment_select type is an extension of the property_assignment_select type. It adds the data type Assembly_bond_definition to the list of alternate data types.

EXPRESS specification:

*)
TYPE at_property_assignment_select = SELECT BASED_ON property_assignment_select WITH
   (Assembly_bond_definition);
END_TYPE;
(*

4.2.4 at_requirement_assignment_item   

The at_requirement_assignment_item type is an extension of the requirement_assignment_item type. It adds the data type Assembly_joint to the list of alternate data types.

EXPRESS specification:

*)
TYPE at_requirement_assignment_item = SELECT BASED_ON requirement_assignment_item WITH
   (Assembly_joint);
END_TYPE;
(*

4.2.5 bond_feature   

The bond_feature type is an extensible list of alternate data types that allows for the designation of the data type General_part_feature.

NOTE   The list of entity data types may be extended in application modules that use the constructs of this module.

EXPRESS specification:

*)
TYPE bond_feature = EXTENSIBLE GENERIC_ENTITY SELECT
   (General_part_feature);
END_TYPE;
(*

4.2.6 degree_of_freedom   

EXPRESS specification:

*)
TYPE degree_of_freedom = ENUMERATION OF
   (x,
    y,
    z,
    u,
    v,
    w);
END_TYPE;
(*

Enumerated item definitions:

x: specifies component x of a degree of freedom;

y: specifies component y of a degree of freedom;

z: specifies component z of a degree of freedom;

u: specifies component u of a degree of freedom;

v: specifies component v of a degree of freedom;

w: specifies component w of a degree of freedom;

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 Assembled_with_bonding   

An Assembled_with_bonding is a type of Assembly_joint that establishes the joint by bonding. Bonding requires the use of material that may change state during the bonding process to form a permanent or semi-permanent joint. In this context, a permanent or semi-permanent joint means that repair of the affected part of the assembly would require destruction and replacement of the bond material.

NOTE    The Assembled_with_bonding object relates two assembly features that are bonded and the Assembly_bond_definition that specifies the category of the bond, its shape, and its material.

EXAMPLE    Figure 1 illustrates the concept of the joint category described herein and the roles of the related application objects.

EXPRESS specification:

*)
ENTITY Assembled_with_bonding
  SUBTYPE OF (Assembly_joint);
  default_bond_definition : Assembly_bond_definition;
END_ENTITY;
(*

Attribute definitions:

default_bond_definition: specifies the Assembly_bond_definition used by the Assembled_with_bonding process to form a joint.

4.3.2 Assembled_with_fasteners   

An Assembled_with_fasteners is a type of Assembly_joint that establishes the assembly by using fasteners to mechanically position a component so that its component mounting features are connected to component mounting features of another component in the assembly. The fasteners are associated with the base component using a Product_version_relationship.

EXAMPLE    The usual case for this is the mounting hardware associated with a power device mounted to the Interconnect_module_component. Figure 2 illustrates the concept of the joint category described herein and the roles of the related Application Objects.

EXPRESS specification:

*)
ENTITY Assembled_with_fasteners
  SUBTYPE OF (Assembly_joint);
END_ENTITY;
(*

4.3.3 Assembly_bond_definition   

An Assembly_bond_definition is the definition of the joint that uses bulk material to bond together portions of the assembly. The association of features through Assembly_bond_definition does not guarantee physical realisability of the design.

EXAMPLE 1   A cut-out may be referenced by a member of Assembly_bond_definition. The semantics of that would be that the walls of the cut-out would participate in the bond. This standard makes no claims about the properties of such a bond.

NOTE 1   This part of ISO 10303 provides the ability to define the typical shape of the bond through the use of Default_assembly_bond_shape_model.

EXPRESS specification:

*)
ENTITY Assembly_bond_definition;
  name : STRING;
  associated_definition : Product_view_definition_reference_with_local_representation;
  bonded_feature_1 : OPTIONAL bond_feature;
  bonded_feature_2 : OPTIONAL bond_feature;
INVERSE
  default_shape : SET[0:1] OF Default_assembly_bond_shape_model FOR shape_characterized_definition;
  bond_category : External_source_identification FOR item;
  bond_material : Material_identification FOR items;
UNIQUE
  UR1: name;
  UR2: associated_definition;
WHERE
  WR1: bonded_feature_1 <> bonded_feature_2;
END_ENTITY;
(*

Attribute definitions:

name: the words by which the Assembly_bond_definition is known.

associated_definition: specifies the role of the Generic_product_view_definition_reference for the Assembly_bond_definition. The associated_definition is provided to support the identification of the product classification.

bonded_feature_1: specifies one role of the bond_feature for the Assembly_bond_definition. The bonded_feature_1 defines the first bond_feature that will be utilized by an Assembled_with_bonding. The value of this attribute need not be specified.

bonded_feature_2: specifies one role of the bond_feature for the Assembly_bond_definition. The bonded_feature_2 defines the second bond_feature that will be utilized by an Assembled_with_bonding. The value of this attribute need not be specified.

default_shape: specifies an inverse relationship that specifies that the existence of the Assembly_bond_definition is dependent on the existence of the Default_assembly_bond_shape_model that specifies the Assembly_bond_definition as its shape_characterized_definition. There shall be not more than one Default_assembly_bond_shape_model for a particular Assembly_bond_definition. The value of this attribute need not be specified.

bond_category: specifies an inverse relationship that specifies that the existence of the Assembly_bond_definition is dependent on the existence of the External_item_identification that specifies the Assembly_bond_definition as its item.

NOTE 2   This part of ISO 10303 does not predefine the classification of bonds for assembly.

EXAMPLE 2   Some typical types are wire bond, solder, and conductive adhesive.

bond_material: specifies an inverse relationship that specifies that the existence of the Assembly_bond_definition is dependent on the existence of the Material_identification that specifies the Assembly_bond_definition as its items. The bond_material may be a composition.

Formal propositions:

UR1: The name shall be unique within a population of Assembly_bond_definitions.

UR2: The associated_definition shall be unique within a population of Assembly_bond_definitions.

WR1: The item that is bonded_feature_1 shall not be bonded_feature_2.

4.3.4 Assembly_joint   

An Assembly_joint is a type of Component_feature_joint. An Assembly_joint may be an Assembled_with_bonding or, additionally, may be an Assembled_with_fasteners. An Assembly_joint is the result of the process that establishes physical connectivity between component features of two components in an assembly.

EXAMPLE    Figure 3 illustrates the roles assigned to items in an assembly by a designer in constructing a member of Assembly_joint.

NOTE 1   Assembly_joint is a central concept in this part of ISO 10303 that provides information necessary to extract a network description of a design from the assembly model. Once extracted, the description may be compared to the original requirements.

NOTE 2   Assembly_joint provides critical information necessary to evaluate the appropriateness of the two features related by Assembly_joint to their use in the assembly, given the process used for the joint.

NOTE 3   Assembly_joint provides critical information necessary to evaluate the appropriateness of the relative position of the two features related by Assembly_joint, given the process used for the joint, and the technology used for each of the associated components, including related tolerances.

NOTE 4   One of these components may be an Interconnect_module_component.

EXPRESS specification:

*)
ENTITY Assembly_joint
  SUPERTYPE OF (Assembled_with_fasteners
                ANDOR Assembled_with_bonding)
  SUBTYPE OF (Component_feature_joint);
  SELF\Component_feature_joint.feature_1 RENAMED assembly_feature_1 : Physical_component_feature;
  SELF\Component_feature_joint.feature_2 RENAMED assembly_feature_2 : Physical_component_feature;
  SELF\Component_feature_joint.associated_definition RENAMED associated_assembly : Assembly_definition;
UNIQUE
  UR1: SELF\Shape_element.element_name, associated_assembly;
WHERE
  WR1: assembly_feature_1 :<>: assembly_feature_2;
END_ENTITY;
(*

Attribute definitions:

assembly_feature_1: specifies one role of the Physical_component_feature for the Assembly_joint.

assembly_feature_2: specifies one role of the Physical_component_feature for the Assembly_joint.

associated_assembly: specifies the assembly_module_or_assembly_group_component that contains the Assembly_joint.

Formal propositions:

UR1: The combination of element_name and associated_assembly shall be unique within a population of Assembly_joint.

WR1: A feature shall not be assembled to itself either directly or indirectly.

4.3.5 Component_mating_constraint_condition   

EXPRESS specification:

*)
ENTITY Component_mating_constraint_condition;
  name : STRING;
  constraining_joint : SET[1:3] OF Assembly_joint;
  constrained_degree_of_freedom : SET[1:6] OF degree_of_freedom;
  of_context : Part_view_definition;
UNIQUE
  UR1: name, of_context;
END_ENTITY;
(*

Attribute definitions:

name: the words by which the Component_mating_constraint_condition is known. The name specifies the identifier of the Component_mating_constraint_condition in the context of the Part_design_view.

constraining_joint: specifies the role of the Assembly_joint for the Component_mating_constraint_condition. There shall be at least one Assembly_joint for the Component_mating_constraint_condition, and there shall be no more than three Assembly_joint for the Component_mating_constraint_condition.

constrained_degree_of_freedom: specifies the role of the degree_of_freedom for the Component_mating_constraint_condition. The constrained_degree_of_freedom specifies either 'x', 'y', 'z', 'u', 'v', or 'w' as the identifier of the degrees of freedom that are constrained for the Component_mating_constraint_condition. There shall be at least one, and there shall be no more than five members of constrained_degree_of_freedom for the Component_mating_constraint_condition.

of_context: specifies the role of the Part_design_view for the Component_mating_constraint_condition.

Formal propositions:

UR1: The combination of name and of_context shall be unique within a population of Component_mating_constraint_condition.

4.3.6 Connection_zone_based_assembly_joint   

A Connection_zone_based_assembly_joint is a type of Assembly_joint that provides a finer degree of granularity by specifying the actual connection zones that are involved in the Assembly_joint. The connection zones are limited to those explicitly defined in the assembly definition.

NOTE 1   An application plan including this Application Object should be carefully reviewed to ensure available post-processors are capable of interpreting the information.

NOTE 2   This part of ISO 10303 does not include explicit support for specifying the design instance level of connection zones for component features in a design where those component definitions are external to the design. Analysis applications will need to examine geometric model properties in order to determine which connection zones are incorporated in joints.

EXAMPLE    A component defined in a library may include connection zones in the definition. The relationships between the feature definitions and the relevant connection zones will need to be queried in order to calculate coverage of an assembly joint that includes the feature of the component in the design.

EXPRESS specification:

*)
ENTITY Connection_zone_based_assembly_joint
  SUBTYPE OF (Assembly_joint);
  zone_1 : Connection_zone;
  zone_2 : Connection_zone;
WHERE
  WR1: zone_1 :<>: zone_2;
END_ENTITY;
(*

Attribute definitions:

zone_1: specifies one role of the Connection_zone_in_design_view for the Connection_zone_based_assembly_joint.

zone_2: specifies one role of the Connection_zone_in_design_view for the Connection_zone_based_assembly_joint.

NOTE 3   There are no semantics associated with the sequence of zones in a Connection_zone_based_assembly_joint.

Formal propositions:

WR1: The zone_1 shall not be zone_2.

4.3.7 Default_assembly_bond_shape_model   

EXPRESS specification:

*)
ENTITY Default_assembly_bond_shape_model
  SUBTYPE OF (Geometric_model);
  shape_characterized_definition : Assembly_bond_definition;
WHERE
  WR1: NOT EXISTS(SELF\Representation.description);
  WR2: SIZEOF(USEDIN(SELF, 'SHAPE_PROPERTY_ASSIGNMENT_ARM.SHAPE_DESCRIPTION_ASSOCIATION.USED_REPRESENTATION'))=0;
END_ENTITY;
(*

Attribute definitions:

shape_characterized_definition: specifies the role of the Assembly_bond_definition for the Default_assembly_bond_shape_model.

Formal propositions:

WR1: The description shall not be populated.

WR2: The Default_assembly_bond_shape_model shall not be used in the role of used_representation by any Shape_description_association.

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