ISO 10303-109:2004
(Main)Industrial automation systems and integration — Product data representation and exchange — Part 109: Integrated application resource: Kinematic and geometric constraints for assembly models
Industrial automation systems and integration — Product data representation and exchange — Part 109: Integrated application resource: Kinematic and geometric constraints for assembly models
ISO 10303-109:2004 specifies the resource constructs for the representation of detailed geometric relationships between constituents of an assembly model including geometric constraints between constituents. The following are within the scope of ISO 10303-109:2004: association of shape aspect relationship with its representation; association of instanced assembly feature relationship with its representation; representation of detailed geometric information of instanced assembly feature relationship at the geometric_representation_item level in terms of elements such as assembly geometric constraints, kinematics pair and kinematics path; representation of the fixed constituent which plays the anchor role in the assembly model. The following are outside the scope of ISO 10303-109:2004: product structure configurations of assemblies and their constituents; tolerance information.
Systèmes d'automatisation industrielle et intégration — Représentation et échange de données de produits — Partie 109: Ressources d'application intégrées: Contraintes cinématiques et géométriques pour les modèles d'assemblage
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INTERNATIONAL ISO
STANDARD 10303-109
First edition
2004-12-01
Industrial automation systems and
integration — Product data
representation and exchange —
Part 109:
Integrated application resource:
Kinematic and geometric constraints for
assembly models
Systèmes d'automatisation industrielle et intégration — Représentation
et échange de données de produits —
Partie 109: Ressources d'application intégrées: Contraintes
cinématiques et géométriques pour les modèles d'assemblage
Reference number
ISO 10303-109:2004(E)
©
ISO 2004
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ISO 10303-109:2004(E)
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ii © ISO 2004 – All rights reserved
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ISO 10303-109:2004(E)
Contents Page
1 Scope.1
2 Normative references .2
3 Terms, definitions, and abbreviations .3
3.1 Terms defined in ISO 10303-1 .3
3.2 Terms defined in ISO 10303-11 .3
3.3 Terms defined in ISO 10303-41 .3
3.4 Terms defined in ISO 10303-42 .3
3.5 Terms defined in ISO 10303-43 .3
3.6 Terms defined in ISO 10303-44 .4
3.7 Terms defined in ISO 10303-108 .4
3.8 Abbreviations…………………………………………………….……………………….4
4 Assembly feature relationship.5
4.1 Introduction .5
4.2 Fundamental concepts and assumptions.6
4.3 Assembly feature relationship type definitions .7
4.3.1 Representing relationship .7
4.4 Assembly feature relationship entity definitions .7
4.4.1 Shape aspect relationship representation association .7
4.4.2 Representative shape representation.9
4.4.3 Free kinematic motion representation.10
4.4.4 Constrained kinematic motion representation .12
4.5 Assembly feature relationship function definitions.13
4.5.1 Assembly root.13
4.5.2 Find assembly root.14
4.5.3 Find shape representation of product definition .16
4.5.4 Find shape representation of shape aspect.17
4.5.5 Find representative shape representation of product definition……….…………….18
4.5.6 Find representative shape representation of shape aspect…………….…………….18
4.5.7 Unique in product definition.19
4.5.8 Unique in shape aspect .20
4.5.9 Using product definition of shape aspect.21
4.5.10 Using product definition of shape representation.22
4.5.11 Using shape aspect of shape representation.23
4.5.12 Using representations with mapping.24
5 Assembly constraint.26
5.1 Introduction.26
5.2 Fundamental concepts and assumptions.27
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ISO 10303-109:2004(E)
5.3 Assembly constraint entity definitions .29
5.3.1 Assembly geometric constraint.29
5.3.2 Binary assembly constraint ………………………………………………………….29
5.3.3 Fixed constituent assembly constraint.31
5.3.4 Parallel assembly constraint .32
5.3.5 Parallel assembly constraint with dimension.33
5.3.6 Surface distance assembly constraint with dimension.33
5.3.7 Angle assembly constraint with dimension .34
5.3.8 Perpendicular assembly constraint .34
5.3.9 Incidence assembly constraint .35
5.3.10 Coaxial assembly constraint .35
5.3.11 Tangent assembly constraint.36
5.4 Assembly constraint function definitions .36
5.4.1 Assembly leaf .36
Annex A (normative) Short names of entities.38
Annex B (normative) Information object registration.39
B.1 Document identification .39
B.2 Schema identification .39
B.2.1 Identification of the schema assembly_feature_relationship…………………….….39
B.2.2 Identification of the schema assembly_constraint…………………………….…….39
Annex C (informative) Computer-interpretable listings .40
Annex D (informative) EXPRESS-G diagrams .41
Annex E (informative) Informative figures…………………………………………………….44
Index.46
Figures
Figure 1 Schema level diagram of relationships between ISO 10303-109 schemas (inside the
box) and other resource schemas……………………………………….………viii
Figure D.1 EXPRESS-G diagram of the assembly_feature_relationship_schema (1 of 1)….….42
Figure D.2 EXPRESS-G diagram of the assembly_constraint_schema (1 of 1)………………….43
Figure E.1 Relationships of schemas in this part of ISO 10303 and related modules with existing
resource entities (overall structure)…………………………….……………………45
Tables
Table A.1 Short names of entities…………………………………………………………………38
iv
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ISO 10303-109:2004(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75% of the member bodies casting
a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 10303 may be the
subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 10303-109 was prepared by Technical Committee ISO/TC184, Industrial automation systems and
integration, Subcommittee SC4, Industrial data.
ISO 10303 is organized as a series of parts, each published separately. The structure of ISO 10303 is
described in ISO 10303-1.
Each part of ISO 10303 is a member of one of the following series: description methods,
implementation methods, conformance testing methodology and framework, integrated generic
resources, integrated application resources, application protocols, abstract test suites, application
interpreted constructs, and application modules. This part is a member the of integrated application
resources series. The integrated generic resources and the integrated application resources specify a
single conceptual product data model.
A complete list of parts of ISO 10303 is available from the Internet:
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ISO 10303-109:2004(E)
Introduction
ISO 10303 is an International Standard for the computer-interpretable representation of product
information and for the exchange of product data. The objective is to provide a neutral mechanism
capable of describing products throughout their life cycle. This mechanism is suitable not only for
neutral file exchange, but also as a basis for implementing and sharing product databases, and as a basis
for archiving.
This part of ISO 10303 is a member of the integrated application resources series. Major subdivisions of
this part of ISO 10303 are:
— Assembly feature relationship schema;
— Assembly constraint schema.
This part of ISO 10303 provides general representations for geometric relationships between
component parts within an assembly model. The distinction of assembly, subassembly and component
part is context dependent. An assembly in some engineering context could be a component part in
another engineering context. In order to cope with this variety, this part of ISO 10303 uses the term
‘constituent’ to represent a generic concept that implies assembly or subassembly or component part in
case these distinctions are not necessary.
EXAMPLE 1 For some applications, an electric motor is regarded as a single component part of a washing
machine rather than as an assembly in its own right.
Detailed geometric relationships between constituents of an assembly are required in applications such
as parametric representation of geometric constraints between constituents, motion animation of an
assembly product, assembly/disassembly process planning, kinematics analysis and tolerance analysis.
Existing STEP resource parts support limited assembly model representations. They capture
hierarchical relationship, alternative constituent and mutual position and orientation between two
constituents. This part of ISO 10303 is intended to fill in missing information to enable the above
mentioned applications.
An important concept newly introduced in this part of ISO 10303 is ‘assembly feature’. An assembly
feature is a portion of a constituent meaningful for representing the connecting relation between
constituents. The detailed geometric relationship between two constituents can be represented via the
necessary number of pairs of assembly features one belonging to one constituent and the other
belonging to the other constituent. The assembly_feature_relationship_schema has been created to
capture feature level correspondence between constituents.
vi
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ISO 10303-109:2004(E)
In most assembly related applications, not only correspondence of assembly features but also more
detailed geometric constraint information such as parallelism, coincidence, tangency, and co-axial
relationships are required at the geometric entity level.
EXAMPLE 2 Two plates belonging to different constituents are constrained to be parallel with distance-L.
These geometric constraint specifications applied between two constituents are summarised in the
assembly_constraint_schema. In assembly related applications, the position and orientation of at least
one constituent within an assembly model should be fixed to prevent infinite number of solutions. This
constituent plays the role of an anchor. The necessary constraint is also included in the assembly-
_constraint_schema
.
This part of ISO 10303 is a member of a set of standards newly introduced for representing detailed
geometric relationships among constituents of an assembly model of a product.
They are:
— ISO 10303-109: Integrated application resources: Kinematic and geometric constraints for
assembly models
— ISO 10303-1101: Application Module: Product property feature definition module
— ISO 10303-1102: Application Module: Assembly feature definition module
The relationships between schemas in this part of ISO 10303 and existing integrated resource schemas
of ISO 10303 are illustrated in Figure 1. The schemas occurring in Figure 1 are components of ISO
10303 integrated resources, and they are specified in the following resource parts:
explicit_constraint_schema
ISO 10303-108
explicit_geometric_constraint_schema ISO 10303-108
geometric_model_schema ISO 10303-42
geometry_schema ISO 10303-42
kinematic_motion_representation_schema
ISO 10303-105
kinematic_structure_schema ISO 10303-105
parameterization_schema ISO 10303-108
product_definition_schema
ISO 10303-41
product_property_definition_schema ISO 10303-41
product_property_representation_schema ISO 10303-41
product_structure_schema ISO 10303-44
representation_schema
ISO 10303-43
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ISO 10303-109:2004(E)
product_ definition_ product_ property_
schema definition_ schema
product_ property_
representation_ schema
product_ structure_
geometry_ schema
schema
geometric_ model_
schema
representation_
assembly_ feature_
schema
relationship_ schema
kinematic_ structure_
schema
assembly_ constraint_
schema
kinematic_ motion_
representation_ schema
explicit_ geometric_
support_ resource_
constraint_ schema
schema
parameterization_ schema explicit_ constraint_
schema
Figure 1 – Schema level diagram of relationships between ISO 10303-109 schemas (inside the
box) and other resource schemas
viii
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INTERNATIONAL STANDARD ISO 10303-109:2004(E)
Industrial automation systems and integration –
Product data representation and exchange –
Part 109:
Integrated application resource: Kinematic and geometric
constraints for assembly models
1 Scope
This part of ISO 10303 specifies the resource constructs for the representation of detailed geometric
relationships between constituents of an assembly model including geometric constraints between
constituents.
The following are within the scope of this part of ISO 10303:
— The association of shape aspect relationship with its representation;
— The association of instanced assembly feature relationship with its representation;
— The representation of detailed geometric information of instanced assembly feature relationship at
the geometric_representation_item level in terms of elements such as assembly geometric
constraints, kinematics pair and kinematics path;
— The representation of the fixed constituent which plays the anchor role in the assembly model.
The following are outside the scope of this part of ISO 10303:
— Product structure configurations of assemblies and their constituents.
— Tolerance information. See clause 5.2 of this part of ISO 10303.
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ISO 10303-109:2004(E)
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO/IEC 8824-1, Information technology – Abstract Syntax Notation One (ASN.1): Specification of
basic notation.
ISO 10303-1, Industrial automation systems and integration – Product data representation and
exchange – Part 1: Overview and fundamental principles.
ISO 10303-11, Industrial automation systems and integration – Product data representation and
exchange – Part 11: Description methods: The EXPRESS language reference manual.
ISO 10303-41, Industrial automation systems and integration – Product data representation and
exchange – Part 41: Integrated generic resource: Fundamentals of product description and support.
ISO 10303-42, Industrial automation systems and integration – Product data representation and
exchange – Part 42: Integrated generic resource: Geometric and topological representation.
ISO 10303-43, Industrial automation systems and integration – Product data representation and
exchange – Part 43: Integrated generic resource: Representation structures.
ISO 10303-44, Industrial automation systems and integration – Product data representation and
exchange – Part 44: Integrated generic resource: Product structure configuration.
ISO 10303-105, Industrial automation systems and integration – Product data representation and
exchange – Part 105: Integrated application resource: Kinematics.
ISO 10303-108:2004, Industrial automation systems and integration – Product data representation and
exchange – Part 108: Integrated application resource: Parameterization and constraints for explicit
geometric product models.
2
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ISO 10303-109:2004(E)
3 Terms, definitions, and abbreviations
3.1 Terms defined in ISO 10303-1
For the purposes of this document, the following terms defined in ISO 10303-1 apply.
— assembly;
— component.
3.2 Terms defined in ISO 10303-11
For the purposes of this document, the following terms defined in ISO 10303-11 apply.
— entity;
— entity data type;
— instance.
3.3 Terms defined in ISO 10303-41
For the purposes of this document, the following term defined in ISO 10303-41 applies.
— shape aspect.
3.4 Terms defined in ISO 10303-42
For the purposes of this document, the following terms defined in ISO 10303-42 apply.
— boundary representation solid model (B-rep);
— constructive solid geometry (CSG);
— geometric representation item.
3.5 Terms defined in ISO 10303-43
For the purposes of this document, the following terms defined in ISO 10303-43 apply.
— representation;
— representation context.
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ISO 10303-109:2004(E)
3.6 Terms defined in ISO 10303-44
For the purposes of this document, the following terms defined in ISO 10303-44 apply.
— constituent;
— sub-assembly.
3.7 Terms defined in ISO 10303-108
For the purposes of this document, the following terms defined in ISO 10303-108 apply.
— constrained element;
— constraint;
— constraint solver;
— defined constraint;
— dimensional constraint;
— directed constraint;
— explicit geometric constraint;
— logical constraint;
— reference element;
— sketch;
— undirected constraint.
3.8 Abbreviations
AP application protocol (of ISO 10303)
B-rep boundary representation
4
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ISO 10303-109:2004(E)
4 Assembly feature relationship
4.1 Introduction
The following EXPRESS declaration begins the assembly_feature_relationship_schema and
identifies the necessary references.
EXPRESS specification:
*)
SCHEMA assembly_feature_relationship_schema;
REFERENCE FROM assembly_constraint_schema; -- 10303-109
REFERENCE FROM geometry_schema; -- 10303-42
REFERENCE FROM kinematic_motion_representation_schema; -- 10303-105
REFERENCE FROM kinematic_structure_schema; -- 10303-105
REFERENCE FROM product_definition_schema; -- 10303-41
REFERENCE FROM product_property_definition_schema; -- 10303-41
REFERENCE FROM product_property_representation_schema; -- 10303-41
REFERENCE FROM product_structure_schema; -- 10303-44
REFERENCE FROM representation_schema; -- 10303-43
REFERENCE FROM support_resource_schema; -- 10303-41
(*
NOTE 1 The schemas referenced above can be found in the following parts of ISO 10303:
assembly_constraint_schema ISO 10303-109
geometry_schema ISO 10303-42
kinematic_ motio n_representation_schema ISO 10303-105
kinematic_structure_schema ISO 10303-105
product_definition_schema ISO 10303-41
product_property_definition_schema ISO 10303-41
product_property_representation_schema ISO 10303-41
product_structure_schema ISO 10303-44
representation_schema ISO 10303-43
support_resource_schema ISO 10303-41
NOTE 2 See annex D, Figure D.1, for a graphical presentation of this schema.
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ISO 10303-109:2004(E)
4.2 Fundamental concepts and assumptions
assembly_feature
An important concept in this part of ISO 10303 is . It is a portion of a constituent
used for defining a connectivity relationship between constituents of an assembly model. It is actually
defined in ISO 10303-1102: Assembly feature definition module as an entity named instanced-
_assembly_feature product_property_instanced_feature
that is a subtype of defined in ISO
10303-1101: Product property feature definition module. As described in the introduction paragraph of
this part of ISO 10303, these two modules in combination with this part of ISO 10303 support the
concept of assembly_feature. See annex E, Figure E.1 for a graphical presentation of these
relationships.
The product_property_instanced_feature itself is a subtype of shape_aspect defined in ISO
10303-41 as shown in annex E. The necessary number of pairs of assembly_feature instances one
belonging to one constituent and the other belonging to the other constituent can represent the detailed
geometric relationship between two constituents within an assembly model.
shape_aspect_relationship
This schema provides resource constructs for linking with its
corresponding representation_relationship and for detailing geometric information of the
representation_relationship.
The entity shape_aspect defined in ISO 10303-41 is an identifiable element of the shape of a product,
and is used to specify a portion of a product shape. The entity shape_aspect_relationship also defined
in ISO 10303-41 relates two instances of shape_aspect.
EXAMPLE 1 If a product named “gear box” has a set of bearing holes for supporting a set of journals of a product
shape_aspect shape_aspect
named “shaft”, the bearing holes and the journals are instances. The instances of
representing bearing holes may have some relationships with the instances of the shape_aspect representing
journals. These relationships can be described by the use of shape_aspect_relationship.
The geometric shape of an instance of shape_aspect is represented by using an instance of shape_-
representation shape_aspect
defined in ISO 10303-41. If a pair of instances are related with each other,
the shape_representation instance of one shape_aspect instance may be specified in the context of the
shape_representation instance of the other shape_aspect instance. An entity data type shape_aspect-
_relationship_representation_association is introduced to relate an instance of shape_aspect_-
relationship with an instance of representation_relationship representing the geometric relationship
between two shape_aspect instances.
EXAMPLE 2 In the above example consisting of a gear box and a shaft, shape_aspect_relationship_-
representation_association is used to identify the representation_relationship representing the relative
position and orientation between a bearing hole and a journal.
As for the representation of detailed geometric information of instanced_assembly_feature_-
relationship, this schema enables the selection from among binary_assembly_constraint,
constrained_kinematic_motion_representation free_kinematic_motion_representation
and .
6
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ISO 10303-109:2004(E)
4.3 Assembly feature relationship type definitions
4.3.1 Representing relationship
The representing_relationship type is used to distinguish those major subtypes of instanced_-
assembly_feature_relationship_representation_association which are binary_assembly_-
constraint, constrained_kinematic_motion_representation, and free_kinematic_motion_-
representation
.
EXPRESS specification:
*)
TYPE representing_relationship = SELECT
(binary_assembly_constraint,
constrained_kinematic_motion_representation,
free_kinematic_motion_representation);
END_TYPE;-- representing_relationship
(*
4.4 Assembly feature relationship entity definitions
4.4.1 Shape aspect relationship representation association
A shape_aspect_relationship_representation_association identifies an instance of representation_-
relationship representing the geometric information of an instance of shape_aspect_relationship.
This
...
INTERNATIONAL ISO
STANDARD 10303-109
First edition
2004-12-01
Industrial automation systems and
integration — Product data
representation and exchange —
Part 109:
Integrated application resource:
Kinematic and geometric constraints for
assembly models
Systèmes d'automatisation industrielle et intégration — Représentation
et échange de données de produits —
Partie 109: Ressources d'application intégrées: Contraintes
cinématiques et géométriques pour les modèles d'assemblage
Reference number
ISO 10303-109:2004(E)
©
ISO 2004
---------------------- Page: 1 ----------------------
ISO 10303-109:2004(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
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2) the EXPRESS specifica
...
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