ISO 14649-14-2013 Automation systems and integration - Physical device control - Data model for computerized numerical controllers - Part 14 Process data for si.pdf

1、 ISO 2013 Automation systems and integration Physical device control Data model for computerized numerical controllers Part 14: Process data for sink electrical discharge machining (sink-EDM) Systmes dautomatisation et intgration Commande des dispositifs physiques Modle de donnes pour les contrleurs

2、 numriques informatiss Partie 14: Donnes de procd pour lusinage de baisse lectrique (baisse EDM) INTERNATIONAL STANDARD ISO 14649-14 First edition 2013-03-01 Reference number ISO 14649-14:2013(E) ISO 14649-14:2013(E)ii ISO 2013 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2013 All rights res

3、erved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either I

4、SO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 14649-14:2013(E) ISO 2013 All rights reserved iii Cont

5、ents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Process data for sink-EDM 2 4.1 Header and references . 2 4.2 Manufacturing features for sink-EDM . 2 4.3 Machining operation for sink-EDM . 3 Annex A (informative) EXPRESS listing .13 Annex B (i

6、nformative) EXPRESS-G .16 Bibliography .26 ISO 14649-14:2013(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 co

7、mmittees. 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 th

8、e 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

9、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 s

10、hall 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 i

11、nformation 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 ge

12、neral 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 elect

13、rical 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

14、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 cyc

15、le. 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 ISO 14649-14:2013(E) Introduction ISO 14649-10 describes the general process data for numerical

16、 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, sink-EDM). It includes the definition of the workpiece, a feature catalogue containing

17、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, wh

18、ich 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 sink Electrical Discharging Machining (sink-EDM) and it defines tec

19、hnology-specific data types representing the machining process for sink-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

20、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 corr

21、esponding text definitions. 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. ISO 2013 All rights reserved v Automatio

22、n systems and integration Physical device control Data model for computerized numerical controllers Part 14: Process data for sink electrical discharge machining (sink- EDM) 1 Scope This part of ISO 14649 specifies the technology-specific data element needed as process data for sink- EDM. Together w

23、ith 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 sink-EDM. It can be used for sink-EDM operations on this kind of machine. The scope of this

24、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

25、 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 numeri

26、cal controllers Part 10: General process data 3 T erms a nd definiti ons 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 quant

27、ities 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 f inis hing machining operation whose aim is to reach the tolerance of the feature required Note 1 to entry: The finishin

28、g operation is usually preceded by the roughing (3.1) operation and followed by the surface finishing (3.3) operation. 3.3 sur f a ce f inis hing machining operation whose aim is to reach the required surface quality Note 1 to entry: The surface finishing operation is usually preceded by the finishi

29、ng (3.3) operation. INTERNATIONAL ST ANDARD ISO 14649-14:2013(E) ISO 2013 All rights reserved 1 ISO 14649-14:2013(E) 4 Process data for sink-EDM 4.1 Header and references The following listing gives the header and the list of entities which are referenced within this schema. SCHEMA sink_edm_schema;

30、(* Version 3 of Jan 13, 2002 Author: Gabor Erdos Your email contact: Gabor Erdos *) REFERENCE FROM machining_schema (*ISO 14649-10*) ( length_measure, bounding_geometry_select, machine_functions, machining_operation, machining_tool, material, property_parameter, technology, toleranced_length_measure

31、, machining_feature, plane_angle_measure, axis1_placement, machining_strategy, bounded_curve, rot_speed_measure, pressure_measure, advanced_brep_shape_representation, direction, rot_direction, radial_direction, toolpath, toolpath_type, toolpath_speedprofile, toolpath_list ); 4.2 Manufacturing featur

32、es for sink-EDM 4.2.1 General The sink-EDM features defined in this subclause are the features that are specific for sink-EDM technology, and are not defined in ISO 14649-10. The base class for all sink-EDM features is the machining_feature, defined in ISO 14649-10. 4.2.2 Sink-EDM volumetric pocket

33、The sink_edm_volumetric_pocket describes a special sink-EDM cavity feature. This feature is created by orbiting the reference point of the tool axis within closed volume. The final shape of the pocket is defined by the outline shape of the tool. The closed volume is defined as a revolved feature, wh

34、ere the feature_boundary curve is revolved around the axis. ENTITY sink_edm_volumetric_pocket SUBTYPE OF (machining_feature); feature_boundary: bounded_curve; axis: axis1_placement; END_ENTITY;2 ISO 2013 All rights reserved ISO 14649-14:2013(E) feature_boundary: Defines the cross section of the revo

35、lved feature. The feature_boundary lies within the features xz-plane (see Figure 1)IF “x_+3” “” “” IF “x_+3” “” “” IF “x_-3” “” “” IF “x_-3” “” “” axis: Specifies the axis of the revolving operation. The axis lies within the features xz- plane (see Figure 1) 1 2 Key 1 axis 2 feature_boundary Figure

36、1 Sink_edm_volumtric_pocket 4.3 Machining operation for sink-EDM 4.3.1 General This subclause introduces all the machining operations and technology-specific data that are needed for sink-EDM. 4.3.2 Sink-EDM machining operation The sink_edm_machining_operation classes define the machining process fo

37、r a limited area of the workpiece, i.e. the contents of a machining workingstep. This entity is inherited by the machining_ workingstep class defined in ISO 14649-10. This class defines additional information needed by the sink-EDM machining. It is a subtype of entity machining_operation defined in

38、ISO 14649-10. ENTITY sink_edm_machining_operation SUBTYPE OF (machining_operation); first_depth: OPTIONAL length_measure; depth_of_step: OPTIONAL length_measure; approach: OPTIONAL approach_retract_strategy; retract: OPTIONAL approach_retract_strategy; END_ENTITY; ISO 2013 All rights reserved 3 ISO

39、14649-14:2013(E) first_depth: If it is defined the sinking is done in multi-step and this define the depth of the first step.IF “x_+3” “” “” IF “x_+3” “” “” IF “x_-3” “” “” IF “x_-3” “” “” depth_of_step: Depth of each additional step (repeated until the depth of the hole is reached). approach: Optio

40、nal information about approach (plunge) strategy to reach the first cut. If multi- ple layers are cut, as specified by first_depth, this strategy will also be used to move from one layer to the start point of the next layer. By default, the NC controller decides about the approach strategy. It may d

41、ecide not to use any approach movement at all if the start point of cutting coincides with the end point of cutting for the preceding operation. If its_toolpath is given, this attribute will be ignored. retract: Optional information about retract strategy after finishing the last cut. By default, th

42、e NC controller decides about the retract strategy. It may decide not to use any retract movement at all if the end point of cutting coincides with the start point of cutting for the next operation. If its_toolpath is given, this attribute will be ignored. 4.3.3 Sink-EDM technology This entity defin

43、es the technological parameters of the sink-EDM operation. It is a subtype of entity technology defined in ISO 14649-10. Since the number of technology parameters are machine dependent, the technology contains only a list that can contain any number of property parameters. ENTITY sink_edm_technology

44、 SUBTYPE OF (technology); spindle: OPTIONAL rot_speed_measure; sync_spindle_and_z_feed: BOOLEAN; other_generator_parameters: SET 0:? OF property_parameter; END_ENTITY; spindle: Rotational speed of the tool. As defined for rot_speed_measure, positive values indicate tool rotation in mathematical posi

45、tive direction of the c axis, i.e. counter-clockwise motion if looking from the tool holder to the workpiece. Note that usual cutting tools require clockwise motion so the value of this attribute will typically be negative.IF “x_+3” “” “” IF “x_+3” “” “” IF “x_-3” “” “” IF “x_-3” “” “” sync_spindle_

46、and_z_feed: If true, the feed rate in z and spindle speed are synchronized. It is used together with the synchronized_feed strategy. other_generator_parameters: Set of other parameters of the generator of generic type. 4.3.4 Sink-EDM machining functions The entity describes the state of various func

47、tions of the machine (e.g. coolant) to be applied during the time span of an operation. It is a subtype of entity machine_functions defined in ISO 14649-10. ENTITY sink_edm_machine_functions SUBTYPE OF (machine_functions); flush: BOOLEAN; aspiration: BOOLEAN; flush_pressure: OPTIONAL pressure_measur

48、e; other_functions: SET 0:? OF property_parameter; END_ENTITY;4 ISO 2013 All rights reserved ISO 14649-14:2013(E) flush: If true, the flush is activated to clean the “chips” and debris from the spark gap. IF “x_+3” “” “” IF “x_+3” “” “” IF “x_-3” “” “” IF “x_-3” “” “” aspiration: If true, the aspira

49、tion is activated to clean the “chips” and debris from the spark gap. flush_pressure: Optional specification of the pressure of the dielectric fluid. other_functions: Optional list of other functions of generic type. 4.3.5 Sink-EDM machining strategy 4.3.5.1 General The sink_edm_machining_strategy class specifies the strategy to be used when executing the operation. When it is specified it will modify the final offset toolpath generation method. It is a subtype of entity machining_strategy de