ISO 14649-13:2013

INTERNATIONAL ISO
STANDARD 14649-13
First edition
2013-03-01
Automation systems and
integration — Physical device
control — Data model for
computerized numerical
controllers —
Part 13:
Process data for wire electrical
discharge machining (wire-EDM)
Systèmes d’automatisation et intégration — Commande des
dispositifs physiques — Modèle de données pour les contrôleurs
numériques informatisés —
Partie 13: Données de procédé pour l’usinage de fils électriques (fils
EDM)
Reference number
©
ISO 2013
© ISO 2013
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ii © ISO 2013 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Process data for wire-EDM . 2
4.1 Header and references . 2
4.2 Manufacturing features for wire-EDM . 2
4.3 Additional types and entities . 7
4.4 Machining operation for wire-EDM . 8
Annex A (informative) EXPRESS listing .15
Annex B (informative) EXPRESS-G .18
Annex C (informative) Simple wire-EDM example 1 .27
Annex D (informative) Simple wire-EDM example 2 .30
Bibliography .33
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is Technical Committee ISO/TC 184, Automation systems
and integration, Subcommittee SC 1, Physical device control.
ISO 14649 consists of the following parts, under the general title Automation systems and integration —
Physical device control — Data model for computerized numerical controllers:
— Part 1: Overview and fundamental principles
— Part 10: General process data
— Part 11: Process data for milling
— Part 12: Process data for turning
— Part 13: Process data for wire electrical discharge machining (wire-EDM)
— Part 14: Process data for sink electrical discharge machining (sink-EDM)
— Part 111: Tools for milling machines
— Part 121: Tools for turning machines
— Part 201: Machine tool data for cutting processes [Technical Specification]
Gaps in numbering were intentionally left in order to allow further additions. ISO 14649-10 is the
ISO 10303 Application Reference Model (ARM) for process-independent data. ISO 10303 ARMs for
specific technologies are added after ISO 14649-10. ISO 14649 is harmonized with ISO 10303 in the
common field of Product Data over the whole life cycle. ISO 14649-1 describes the different fields of
standardization between ISO 14649, ISO 10303 and CNC manufacturers with respect to implementation
and software development.
iv © ISO 2013 – All rights reserved

Introduction
ISO 14649-10 describes the general process data for numerical controlled machining and includes its
schema. The subject of this schema (called machining_schema) is the definition of data types, which
are generally relevant for different technologies (e.g. milling, turning, wire-EDM). It includes the
definition of the workpiece, a feature catalogue containing features, which might be referenced by
several technologies, the general executables and the basis for an operation definition. Not included in
this schema are geometric items and presentations, which are referenced from the generic resources
of ISO 10303, and the technology-specific definitions, which are defined in separate parts of ISO 14649.
ISO 14649-10 is not a stand-alone standard. Its implementation needs at least one additional technology-
specific part (e.g. ISO 14649-11 for milling). This part of ISO 14649 describes wire Electrical Discharging
Machining (wire-EDM) and it defines technology-specific data types representing the machining process
for wire-EDM.
The main text of this part of ISO 14649 provides definitions and explanations of the data entities needed
to provide control data information to an EDM controller.
The EXPRESS forms of the entities are given again in Annex A without the explanatory text for information.
Annex B provides an alternative view of these entities, with the different figures showing graphical
representations of different elements. These figures are purely informative: a detailed explanation of
the entities in the figures is given in the corresponding text definitions in Clause 4.
Two examples of ISO 14649 files, providing illustrations of possible uses, are given in Annex C and Annex D.
In addition, the schema uses machining features similar to ISO 10303-224. The description of process
data is carried out using EXPRESS language as defined in ISO 10303-11. The encoding of the data is
carried out using ISO 10303-21.
INTERNATIONAL STANDARD ISO 14649-13:2013(E)
Automation systems and integration — Physical device
control — Data model for computerized numerical
controllers —
Part 13:
Process data for wire electrical discharge machining (wire-
EDM)
1 Scope
This part of ISO 14649 specifies the technology-specific data element needed as process data for wire-
EDM. Together with the general process data described in ISO 14649-10, it describes the interface
between computerized numerical controller and the programming system (i.e. CAM system or shop-floor
programming system) for wire-EDM. It can be used for wire-EDM operations on this kind of machine.
The scope of this part of ISO 14649 does not include tools for any other technologies (e.g. turning,
grinding). Tools for these technologies are described in other parts of ISO 14649.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 14649-10, Industrial automation systems and integration — Physical device control — Data model for
computerized numerical controllers — Part 10: General process data
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14649-10 and the following apply.
3.1
roughing
machining operation used to cut a part
Note 1 to entry: While the aim of roughing is to remove large quantities of material in a short time, the surface
quality is usually not important.
Note 2 to entry: The roughing operation is usually followed by the finishing (3.2) operation.
3.2
finishing
machining operation whose aim is to reach the tolerance of the feature required
Note 1 to entry: The finishing operation is usually preceded by the roughing (3.1) operation and followed by the
surface finishing (3.3) operation.
3.3
surface finishing
machining operation whose aim is to reach the required surface quality
Note 1 to entry: The surface finishing operation is usually preceded by the finishing (3.3) operation.
4 Process data for wire-EDM
4.1 Header and references
The following listing gives the header and the list of entities that are referenced within this schema.
SCHEMA wire_edm_schema;
(*
Version 5 of Feb 28, 2003
Author: Gabor Erdos
Modified by: Willy Maeder
Jacques Richard
*)
REFERENCE FROM machining_schema (*ISO 14649-10*)
(
bounded_curve,
cartesian_point,
direction,
identifier,
label,
length_measure,
machine_functions,
machining_operation,
machining_feature,
machining_tool,
material,
pressure_measure,
property_parameter,
speed_measure,
plane_angle_measure,
technology,
machining_strategy,
toolpath_list
);
4.2 Manufacturing features for wire-EDM
4.2.1 General
The wire-EDM features defined in this subclause are the features that are specific for wire-EDM
technology, and are not defined in ISO 14649-10. The base class for all wire-EDM features is the
machining_feature, defined in ISO 14649-10.
4.2.2 General_path
The most general 4-axis wire-EDM operation is a manufacturing feature described by a ruled surface, but
in many cases a curve based feature description is sufficient. The general_path feature is characterized
by the fact that the tool movements are curve driven.
The general_path feature can be specified in two ways:
a) by one curve, an optional side angle and an optional transition type;
b) defined by two synchronized curves.
ENTITY general_path
SUPERTYPE OF (ONEOF(general_single_path, general_twin_path))
SUBTYPE OF (machining_feature);
END_ENTITY;
4.2.3 General_single_path
The general_single_path (see Figure 1) is defined by a general 2D or 3D curve with a slope angle
specification and some specific parameters. The 2-axis wire-EDM operation, which is very usual, is a
particular case of general_single_path where the slope angle is equal to 0 degrees.
2 © ISO 2013 – All rights reserved

ENTITY general_single_path
SUBTYPE OF (general_path);
feature_principal_boundary: bounded_curve;
slope: OPTIONAL plane_angle_measure;
transition_types: OPTIONAL EDM_transition;
END_ENTITY;
feature_principal_boundary: The outline or shape that forms the principal edge of the general_path.
When travelling along the curve base as defined by its sense, the mate-
rial lies on the left side of the curve according to the axis2_placement_3d
orientation (i.e. when projecting the curve in the local xy plane). It is the
axis2_placement_3d inherited from the machining_feature that defines
the local z-axis and the local xy plane. IF “x_+3” “” “”
IF “x_-3” “” “”
slope: Optional angle of the border of the general_path measured against the
local z-axis. Default is 0 degree. Implicitly a secondary curve bound-
ary is defined: this is done by extending a line from each point on the
principal boundary curve, at the specified angle, until it intersects the
secondary local plane at the distance depth along the negative local
z-axis. The shape of this implicit seco
...