Machine tools - Safety - Electro-discharge machines (ISO 28881:2013)

ISO 28881:2013 specifies safety requirements and/or protective measures, applicable to EDM equipment and EDM systems, such as manually controlled EDM die sinking or EDM drilling machines, numerically controlled EDM die sinking or EDM drilling machines and numerically controlled EDM wire cutting machines intended to be adopted by persons undertaking the design, construction, installation and/or supply of such equipment. It also includes information to be provided by the manufacturer to the user. It is not applicable to arc eroding and electro-chemical machining equipment.
ISO 28881:2013 takes account of the precondition of the intended use as well as the reasonably foreseeable misuse, in normal workshop environments and non-explosive atmospheres, including transportation, installation, setting, maintenance, repair and dismantling for removal or disposal of EDM equipment and EDM systems.
It is also applicable to auxiliary devices essential for EDM processing.
ISO 28881:2013 deals with all significant hazards, hazardous situations or hazardous events relevant to EDM equipment and EDM systems, where they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer.
ISO 28881:2013 is intended to apply to machines manufactured after its date of publication.

Werkzeugmaschinen - Sicherheit - Funkenerodiermaschinen (ISO 28881:2013)

Diese internationale Norm legt technische Sicherheitsanforderungen und/oder Schutzmaßnahmen welche für EDM-Einrichtungen und EDM-Systeme anwendbar sind fest:
   manuell gesteuerte EDM-Senkerodiermaschinen und EDM-Bohrmaschinen
   numerisch gesteuerte EDM-Senkerodiermaschinen und EDM-Bohrmaschinen, und
   numerisch gesteuerte EDM-Drahterodiermaschinen
die von Personen zu beachten sind, die mit der Auslegung, Konstruktion, Aufstellung und/oder Lieferung von diesen Einrichtungen befasst sind. Diese internationale Norm enthält auch Informationen, die dem Anwender durch den Hersteller zur Verfügung gestellt werden müssen.
Diese internationale Norm gilt nicht für Maschinen zur Lichtbogenerosion und elektrochemischen Bearbeitungsmaschinen.
Die in dieser internationalen Norm enthaltenen Anforderungen beziehen die bestimmungsgemäße Verwendung unter üblichen Werkstattbedingungen in nicht explosionsfähiger Atmosphäre einschließlich Installation, Einrichten, Wartung, Reparatur und Demontage zur Standortänderung oder Entsorgung von EDM Einrichtungen mit ein.
Diese internationale Norm gilt auch für Zusatzeinrichtungen, die für die EDM- Bearbeitung erforderlich sind.
Diese internationale Norm behandelt spezifische Gefährdungen, Gefahrensituationen oder gefährliche Ereignisse welche im Zusammenhang mit EDM-Einrichtungen und EDM-Systemen, bei bestimmungs¬gemäßer Verwendung und unter Bedingungen des Missbrauchs, welche für den Hersteller vernünftigerweise vorhersehbar sind, stehen. (siehe Abschnitt 4)
Diese Internationale Norm gilt für Maschinen, die nach dem Ausgabedatum dieser Internationalen Norm hergestellt wurden.

Machines-outils - Sécurité - Machines d'électro-érosion (ISO 28881:2013)

L'ISO 28881:2012 spécifie les exigences et/ou les mesures de sécurité applicables aux équipements et aux systèmes d'usinage par électro-érosion, telles que les machines de forage par étincelage ou de perçage par électro-érosion à commande manuelle, les machines de forage par étincelage ou de perçage par électro-érosion à commande numérique et les machines de coupage par électro-érosion à fil à commande numérique qui doivent être adoptées par les personnes chargées de la conception, de la fabrication, de l'installation et/ou de la fourniture de tels équipements. Elle contient aussi les informations que le fabricant doit fournir à l'utilisateur. Elle n'est pas applicable aux machines d'érosion par arc électrique ni aux machines d'usinage électrochimique.
L'ISO 28881:2012 tient compte des conditions préalables d'utilisation normale ainsi que du mauvais usage raisonnablement prévisible, en environnement industriel normal et sans atmosphère explosive, ce qui inclut le transport, l'installation, le réglage, la maintenance, la réparation et le démontage pour évacuation ou mise au rebus des équipements et des systèmes d'usinage par électro-érosion.
Elle est également applicable aux dispositifs auxiliaires essentiels au procédé d'usinage par électro-érosion.
L'ISO 28881:2012 traite de l'ensemble des phénomènes dangereux significatifs, situations dangereuses ou événements dangereux liés aux équipements ou aux systèmes d'usinage par électro-érosion, dans les conditions d'utilisation normale ainsi que dans des conditions de mauvais usage raisonnablement prévisibles par le fabricant.
L'ISO 28881:2012 est applicable aux machines construites après sa date de publication.

Obdelovalni stroji - Varnost - Elektroerozijski stroji (EDM) (ISO 28881:2013)

Ta mednarodni standard določa varnostne zahteve in/ali zaščitne ukrepe, ki se uporabljajo za opremo in sisteme EDM, kot so – ročni EDM za potopno erozijo ali vrtalni stroji EDM, – numerični EDM za potopno erozijo ali vrtalni stroji EDM, – numerični EDM za rezanje žic, ki jih morajo prevzeti osebe, ki se ukvarjajo z načrtovanjem, gradnjo, namestitvijo in/ali dobavo te opreme. Ta mednarodni standard zajema tudi podatke, ki jih mora uporabniku priskrbeti proizvajalec. Ta mednarodni standard se ne uporablja za opremo za obločno erozijo in elektro-kemično opremo. Ta mednarodni standard upošteva predpogoj za predvideno uporabo in razumno predvidljivo napačno uporabo v normalnem delavniškem okolju in neeksplozivnih atmosferah, vključno s prevozom, namestitvijo, nastavitvijo, vzdrževanjem, popravilom in podiranjem za odstranjevanje ali odlaganje opreme in sistemov EDM. Ta mednarodni standard se uporablja tudi za pomožne naprave, ki so bistvene za obdelavo EDM. Ta mednarodni standard obravnava vsa večja tveganja, nevarne situacije ali nevarne dogodke v zvezi z opremo ali sistemi EDM, kadar se uporabljajo v skladu z njihovim namenom in pod pogoji pričakovane nepravilne uporabe, ki jih je predvidel proizvajalec (gl. točko 4). Ta mednarodni standard se uporablja za stroje, proizvedene po datumu objave tega mednarodnega standarda.

General Information

Status
Published
Publication Date
06-Aug-2013
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
07-Aug-2013
Completion Date
07-Aug-2013

RELATIONS

Buy Standard

Standard
EN ISO 28881:2013 - BARVE na PDF-strani 30
English language
60 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 28881:2013
01-november-2013
1DGRPHãþD
SIST EN 12957:2002+A1:2009
Obdelovalni stroji - Varnost - Elektroerozijski stroji (EDM) (ISO 28881:2013)
Machine tools - Safety - Electro discharge machines (ISO 28881:2013)
Werkzeugmaschinen - Sicherheit - Funkenerodiermaschinen (ISO 28881:2013)
Machines-outils - Sécurité - Machines d'électro-érosion (ISO 28881:2013)
Ta slovenski standard je istoveten z: EN ISO 28881:2013
ICS:
25.120.40 Elektrokemijski stroji Electrochemical machines
SIST EN ISO 28881:2013 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 28881:2013
---------------------- Page: 2 ----------------------
SIST EN ISO 28881:2013
EUROPEAN STANDARD
EN ISO 28881
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2013
ICS 25.080.01 Supersedes EN 12957:2001+A1:2009
English Version
Machine tools - Safety - Electro-discharge machines (ISO
28881:2013)

Machines-outils - Sécurité - Machines d'électro-érosion Werkzeugmaschinen - Sicherheit -

(ISO 28881:2013) Funkenerodiermaschinen (ISO 28881:2013)
This European Standard was approved by CEN on 14 March 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 28881:2013: E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 28881:2013
EN ISO 28881:2013 (E)
Contents Page

Foreword ..............................................................................................................................................................3

Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of EU Directive 2006/42/EC ..........................................................................................4

---------------------- Page: 4 ----------------------
SIST EN ISO 28881:2013
EN ISO 28881:2013 (E)
Foreword

This document (EN ISO 28881:2013) has been prepared by Technical Committee ISO/TC 39 "Machine tools"

in collaboration with Technical Committee CEN/TC 143 “Machine tools - Safety” the secretariat of which is

held by SNV.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by February 2014, and conflicting national standards shall be withdrawn

at the latest by February 2014.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 12957:2001+A1:2009.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive.

For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 28881:2013 has been approved by CEN as EN ISO 28881:2013 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 28881:2013
EN ISO 28881:2013 (E)
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC

This European Standard has been prepared under a mandate given to CEN by the European Commission

and the European Free Trade Association to provide a means of conforming to Essential Requirements of the

New Approach Directive 2006/42/EC on machinery.

Once this standard is cited in the Official Journal of the European Union under that Directive and has been

implemented as a national standard in at least one Member State, compliance with the normative clauses of

this standard confers, within the limits of the scope of this standard, a presumption of conformity with the

relevant Essential Requirements of that Directive and associated EFTA regulations.

WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling

within the scope of this standard.
---------------------- Page: 6 ----------------------
SIST EN ISO 28881:2013
INTERNATIONAL ISO
STANDARD 28881
First edition
2013-08-01
Machine tools — Safety — Electro-
discharge machines
Machines-outils — Sécurité — Machines d’électro-érosion
Reference number
ISO 28881:2013(E)
ISO 2013
---------------------- Page: 7 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2013

All rights reserved. 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 ISO at the address below or ISO’s 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 copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 3

4 List of significant hazards ........................................................................................................................................................................... 7

5 Safety requirements and/or protective measures ............................................................................................................ 9

5.1 General requirements ....................................................................................................................................................................... 9

5.2 Safety-related parts of control systems for EDM equipment and EDM systems .........................10

5.3 Operating modes ................................................................................................................................................................................11

5.4 Stop functions .......................................................................................................................................................................................13

5.5 Specific requirements ....................................................................................................................................................................14

6 Information for use .........................................................................................................................................................................................22

6.1 General ........................................................................................................................................................................................................22

6.2 Marking, signs and written warnings ...............................................................................................................................22

6.3 Instruction handbook ....................................................................................................................................................................22

Annex A (informative) Examples and schematic diagrams ........................................................................................................28

Annex B (normative) Noise-emission measurements .....................................................................................................................37

Annex C (informative) Fire protection codes for special regional cases ......................................................................38

Annex D (informative) Guidelines for risk assessment on EDM equipment and EDM systems to

identify the required performance level and, if necessary, category .........................................................48

Bibliography .............................................................................................................................................................................................................................51

© ISO 2013 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(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 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 document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 28881 was prepared by Technical Committee ISO/TC 39, Machine tools, Subcommittee SC 10, Safety.

iv © ISO 2013 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(E)
Introduction

This International Standard has been prepared to be a Harmonized Standard to provide one means of

conforming to the Essential Safety Requirements of the Machinery Directive of the European Union and

associated EFTA regulations.
This document is a type-C standard as defined in ISO 12100:2010.

The machinery concerned and the extent to which hazards, hazardous situations and events are covered

are indicated in the Scope of this International Standard. In addition, electro-discharge machining (EDM)

equipment and EDM systems are intended to be designed according to the principles of ISO 12100 for

hazards which are not dealt with in this International Standard.

When requirements of this type-C standard are different from those which are stated in type-A or

-B standards, the requirements of this type-C standard take precedence over the requirements of

other standards for machines that have been designed and built according to the requirements of this

type-C standard.

This International Standard defines performance level and safety categories of the safety-related parts

of the control system for EDM equipment and EDM systems as defined in ISO 13849-1:2006.

The requirements of this International Standard concern designers, manufacturers, suppliers and

importers of machines described in the Scope.

This International Standard also includes a list of informative items intended to be provided by the

manufacturer to the user.
© ISO 2013 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 28881:2013
---------------------- Page: 12 ----------------------
SIST EN ISO 28881:2013
INTERNATIONAL STANDARD ISO 28881:2013(E)
Machine tools — Safety — Electro-discharge machines
1 Scope

This International Standard specifies safety requirements and/or protective measures, applicable to

EDM equipment and EDM systems, such as
— manually controlled EDM die sinking or EDM drilling machines,
— numerically controlled EDM die sinking or EDM drilling machines, and
— numerically controlled EDM wire cutting machines

intended to be adopted by persons undertaking the design, construction, installation and/or supply

of such equipment. This International Standard also includes information to be provided by the

manufacturer to the user.

This International Standard is not applicable to arc eroding and electro-chemical machining equipment.

This International Standard takes account of the precondition of the intended use as well as the

reasonably foreseeable misuse, in normal workshop environments and non-explosive atmospheres,

including transportation, installation, setting, maintenance, repair and dismantling for removal or

disposal of EDM equipment and EDM systems.

This International Standard is also applicable to auxiliary devices essential for EDM processing.

This International Standard deals with all significant hazards, hazardous situations or hazardous events

relevant to EDM equipment and EDM systems, where they are used as intended and under conditions of

misuse which are reasonably foreseeable by the manufacturer (see Clause 4).

This International Standard is intended to apply to machines manufactured after the date of publication

of this International Standard.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For undated references, the latest edition of the referenced document

(including any amendments) applies.

ISO 3746, Acoustics — Determination of sound power levels and sound energy levels of noise sources using

sound pressure — Survey method using an enveloping measurement surface over a reflecting plane

ISO 4413, Hydraulic fluid power — General rules and safety requirements for systems and their components

ISO 4414, Pneumatic fluid power — General rules and safety requirements for systems and their components

ISO 4871, Acoustics — Declaration and verification of noise emission values of machinery and equipment

ISO 11202, Acoustics — Noise emitted by machinery and equipment — Determination of emission sound pressure

levels at a work station and at other specified positions applying approximate environmental corrections

ISO/TR 11688-1, Acoustics — Recommended practice for the design of low-noise machinery and equipment —

Part 1: Planning

ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction

© ISO 2013 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(E)

ISO 13849-1:2006, Safety of machinery — Safety-related parts of control systems — Part 1: General

principles for design

ISO 13849-2:2003, Safety of machinery — Safety-related parts of control systems — Part 2: Validation

ISO 13850, Safety of machinery — Emergency stop — Principles for design

ISO 13855, Safety of machinery — Positioning of safeguards with respect to the approach speeds of parts

of the human body

ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by upper

and lower limbs
ISO 14118, Safety of machinery — Prevention of unexpected start-up

ISO 14122-1, Safety of machinery — Permanent means of access to machinery — Part 1: Choice of fixed

means of access between two levels

ISO 14122-2, Safety of machinery – Permanent means of access to machinery — Part 2: Working

platforms and walkways

ISO 14122-3, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs, stepladders

and guard-rails

IEC 60204-1:2009, Safety of machinery — Electrical equipment of machines — Part 1: General requirements

IEC 60529, Degrees of protection provided by enclosures (IP Code)

IEC 61000-6-2, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for

industrial environments

IEC 61000-6-4, Electromagnetic compatibility (EMC) — Part 6-4: Generic standards — Emission standard

for industrial environments

IEC 61310-1, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual,

acoustic and tactile signals

IEC 61310-2, Safety of machinery — Indication, marking and actuation — Part 2: Requirements for marking

IEC 61558-1, Safety of power transformers, power supplies, reactors and similar products — Part 1: General

requirements and tests

IEC 61800-5-2:2007, Adjustable speed electrical power drive systems — Part 5-2: Safety requirements —

Functional
EN 2, Classification of fires
EN 54-1, Fire detection and fire alarm systems — Part 1: Introduction

EN 349, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

EN 614-1, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles

EN 614-2, Safety of machinery — Ergonomic design principles — Part 2: Interactions between the design of

machinery and work tasks

EN 626-1, Safety of machinery — Reduction of risks to health from hazardous substances emitted by

machinery — Part 1: Principles and specifications for machinery manufacturers

EN 953:2009, Safety of machinery — Guards — General requirements for the design and construction of

fixed and movable guards
EN 1037:2008, Safety of machinery — Prevention of unexpected start-up
2 © ISO 2013 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(E)

EN 1088, Safety of machinery — Interlocking devices associated with guards — Principles for design and selection

EN 12198-1, Safety of machinery — Assessment and reduction of risks arising from radiation emitted by

machinery — Part 1: General principles

EN 12198-2, Safety of machinery — Assessment and reduction of risks arising from radiation emitted by

machinery — Part 2: Radiation emission measurement procedures

EN 12198-3, Safety of machinery — Assessment and reduction of risks arising from radiation emitted by

machinery — Part 3: Reduction of radiation by attenuation or screening

EN 62226-1, Exposure to electric or magnetic fields in the low and intermediate frequency range — Methods

for calculating the current density and internal electric field induced in the human body — Part 1: General

EN 62226-2-1, Exposure to electric or magnetic fields in the low and intermediate frequency range —

Methods for calculating the current density and internal electric field induced in the human body— Part 2-1:

Exposure to magnetic fields — 2D models

EN 62226-3-1, Exposure to electric or magnetic fields in the low and intermediate frequency range —

Methods for calculating the current density and internal electric field induced in the human body — Part

3-1: Exposure to electric fields — Analytical and 2D numerical models

EN 62311, Assessment of electronic and electrical equipment related to human exposure restrictions for

electromagnetic fields (0 Hz – 300 GHz)

CISPR 11, Industrial, scientific and medical equipment — Radio-frequency disturbance characteristics —

Limits and methods of measurement
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 12100:2010 and

ISO 13849-1:2006 and the following apply.
3.1
control circuit
circuit used for the control, including monitoring, of the machine
Note 1 to entry: For electrical equipment, see IEC 60204-1:2009, 3.8.
3.2
machine control system

system that responds to input signals from parts of machine elements, operators, external control

equipment or any combination of these, and generates output signals causing a machine to behave in the

intended manner, as specified in ISO 13849-1:2006, 3.1.32
3.3
dielectric fluid

non-conductive medium to improve the discharge effect, evacuate debris and cool the

workpiece/electrode
3.4
dielectric fluid container
tank system to keep the dielectric fluid in a condition suitable for EDM
EXAMPLE Filtering and cooling.
3.5
EDM equipment

machine tool that includes all the necessary units for the process of electro-discharge machining

EXAMPLE Generator, control circuits and dielectric fluid container.
© ISO 2013 – All rights reserved 3
---------------------- Page: 15 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(E)
3.6
EDM system

assembly of EDM equipment and other machines or devices, which are arranged, linked and controlled

to function as an integrated whole
3.7
electrode changer

mechanism integrated with the machine to supply a previously loaded electrode in

exchange for another electrode

Note 1 to entry: The changing device is expected to enable an operator to load/unload electrodes from outside of

the work area.
3.8
electro-discharge machining
EDM
any machining process based on spark erosion
Note 1 to entry: Electro-discharge machining is generally abbreviated as “EDM”.
3.9
electro-magnetic compatibility

ability of EDM equipment and EDM systems to function satisfactorily in their electro-magnetic environment

without introducing intolerable electro-magnetic disturbances to anything in that environment

Note 1 to entry: Electro-magnetic compatibility is generally abbreviated as “EMC”.

3.10
electronic handwheel

manually operated control device that initiates and maintains an axis movement by pulse generation

input to the numerical control during its rotation
3.11
enabling device

additional manually operated device used in conjunction with a start control and which, where

continuously actuated, allows a machine to function
[SOURCE: ISO 12100:2010, 3.28.2 — modified.]
3.12
flammable dielectric fluid

dielectric fluid used in EDM, characterized by its relative ease of ignition and relative ability to

sustain combustion
3.13
flash point

minimum temperature at which the dielectric fluid used in die sinking electro-discharge machining

gives off sufficient combustible gas or vapour to ignite and sustain combustion
3.14
generator

unit to convert the electrical power supplied to the EDM equipment and EDM system for the purpose of

being used for spark erosion processing
3.15
hazardous electric discharge power

electrical energy used to perform machining by electro-thermal material removal, which exceeds a

permitted level of voltage for contact with persons
4 © ISO 2013 – All rights reserved
---------------------- Page: 16 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(E)
3.16
hold-to-run control device

control device that initiates and maintains hazardous machine functions only as long as the manual

control (actuator) is actuated
[SOURCE: ISO 12100:2010, 3.28.3 — modified.]
3.17
electric machining power

electrical power supplied to the EDM equipment and EDM system transformed by the generator in

specific electric energy, supplied as a tool to the sinker/wire electrode and the workpiece, to perform

machining by electro-thermal material removal
3.18
mean time to dangerous failure
MTTF
expectation of the mean time to dangerous failure
[SOURCE: ISO 13849-1:2006, 3.1.25 — modified.]
3.19
numerical control
computerized numerical control
CNC

automatic control of a process performed by a device, which makes use of numerical data introduced

while the operation is in progress
[SOURCE: ISO/IEC 2806:1994, definition 2.1.1 — modified.]
3.20
operating mode
possible mode for use of the machine
3.20.1
automatic mode

mode for use under numerical control to achieve programmed sequential operation with the guards

closed, until stopped by a program or an operator
Note 1 to entry: This term is equivalent to machining mode.

Note 2 to entry: For machinery having automatic setting programs, such operations are considered automatic mode.

3.20.2
setting mode

mode for use without electric machining power, for operations in which adjustments for the subsequent

machining are performed by the operator

Note 1 to entry: Measuring cycles (e.g. touching of the workpiece with a probe or electrode), checking the

movement of the workpiece and/or electrode using the electrode and/or workpiece changer, checking/optimizing

the injection or suction flushing, a dry run for checking the NC program, etc. are procedures forming part of the

setting mode (see 5.3.2.2).
3.20.3
discharge alignment mode

mode for the use for specific alignment with the discharge power on and with the guards of EDM

equipment temporarily open and alternative safety measures activated

EXAMPLE Exhaust air extraction adjustment, e.g. vertical wire alignment, dielectric flushing adjustment and

visual machining inspection.
© ISO 2013 – All rights reserved 5
---------------------- Page: 17 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(E)
3.21
performance level

discrete level to specify the ability of safety-related parts of control systems to perform a safety function

under reasonably foreseeable conditions
[SOURCE: ISO 13849-1:2006, 3.1.23 — modified.]
3.22
shielding

mechanical barrier or enclosure of conductive material intended to attenuate the emission/penetration

of a varying electro-magnetic field into an assigned region
3.23
EDM process

removal of material in a dielectric fluid by electro-discharges, which are separated in time and randomly

distributed in space, between two electrically conductive electrodes, and where the energy in the

discharge is controlled

Note 1 to entry: The two electrically conductive electrodes are the tool electrode and the workpiece electrode.

3.24
EDM die sinking
removal of material by spark erosion to produce various shapes in the workpiece

Note 1 to entry: Shapes in the workpiece may be concave, convex and prismatic holes.

3.25
EDM drilling

removal of material by spark erosion with a tubular electrode to produce straight holes in the workpiece

3.26
EDM wire cutting

removal of material by spark erosion with a wire electrode to produce prismatic shapes in the workpiece

3.27
work area

space within the envelope of the machine where the EDM process can take place

3.28
workpiece changer

mechanism forming part of the machine to load a workpiece or pallet in exchange for

another workpiece or palette previously unloaded

Note 1 to entry: The workpiece changer/palette changer is designed to enable an operator to load/unload the

workpiece or palette from outside of the work area.
3.29
work tank

unit surrounding the work area to contain the dielectric fluid for EDM processes

6 © ISO 2013 – All rights reserved
---------------------- Page: 18 ----------------------
SIST EN ISO 28881:2013
ISO 28881:2013(E)
4 List of significant hazards

This clause lists all the significant hazards, hazardous situations and events, as far as they are dealt with

in this International Standard, identified by risk assessment as significant for this type of machinery,

and which require action to eliminate or reduce the risk.

NOTE 1 The purpose of risk assessment is to identify hazards and estimate and evaluate risk to be reduced

and to transfer the remaining risk to the user (see Clause 6). There are many methods and tools a

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.