prEN ISO 6909

Machine tools Safety - Press brakes (ISO/DIS 6909:2023)

This document specifies technical safety requirements and measures to be adopted by persons undertaking the design, manufacture and supply of press brakes which are intended to work cold metal or material partly of cold metal but which can be used in the same way to work other sheet materials (e.g. cardboard, plastic, rubber, leather, etc.) and also referred to as machines.
NOTE 1 The design of a machine includes the study of the machine itself, taking into account all phases of the “life” of the machine mentioned in ISO 12100:2010, 5.4, and the drafting of the instructions related to all the above phases.
This document covers the following types of machines (see Annex J) :
-   Hydraulic press brakes
-   Hydraulic servo-drive press brakes
-   Screw servo-drive press brakes
-   Belt-spring servo-drive press brakes
The requirements in this document take account of intended use, as defined in ISO 12100:2010, 3.23, as well as reasonably foreseeable misuse, as defined in ISO 12100:2010, 3.24. This document presumes access to the press brake from all directions, deals with all significant hazards during the various phases of the life of the machine described in Clause 4, and specifies the safety measures for both the operator and other exposed persons.
NOTE 2 All significant hazards means those identified or associated with press brakes at the time of the publication of this document.
This document applies to press brakes which can function independently or in combination (e.g. two machines in tandem or more) and can also be used as a guide for the design of press brakes which are intended to be integrated in a manufacturing system.
This document deals with the significant hazards, hazardous situations and events relevant to press brakes and ancillary devices (see Clause 4). This document specifies the safety requirements for press brakes defined in this clause.
This document does not cover press brakes which transmit energy to impart beam motion by using pneumatic means or mechanical clutch or press brakes that use combination of technologies (e.g. combined hydraulic and screw servo-drive press brake or combined hydraulic servo-drive and screw servo-drive press brake)
This document does not cover machines whose principal designed purpose is:
a)   sheet folding by rotary action;
b)   tube and pipe bending by rotary action;
c)   roll bending.
This document does not cover hazards related to the use of press brakes in explosive atmospheres.
This document is not applicable to press brakes which are manufactured before the date of its publication.
This document does not cover the safety aspect of equipment for automatic loading and unloading where provided. Guidance on how to take into account additional automatic loading and unloading equipment can be found in ISO 11161.

Werkzeugmaschinen-Sicherheit - Gesenkbiegepressen (ISO/DIS 6909:2023)

Dieses Dokument legt die technischen Sicherheitsanforderungen und Schutzmaßnahmen fest, die von jenen Personen zu beachten sind, die für die Konstruktion, die Herstellung und die Lieferung von Gesenkbiegepressen, die zur Kaltbearbeitung von Metall oder von teilweise aus kaltem Metall bestehendem Material bestimmt sind, die jedoch ebenso zur Bearbeitung sonstiger Flachmaterialien (z. B. Karton, Plastik, Gummi, Leder usw.) verwendet werden können und die auch als Maschinen bezeichnet werden.
ANMERKUNG 1   Die Konstruktion einer Maschine beinhaltet die Betrachtung der Maschine selbst, unter Berücksichtigung aller Phasen der Nutzungsdauer der Maschine, wie in ISO 12100:2010, 5.4, genannt, sowie der Erstellung der Betriebsanleitung in Bezug auf alle oben genannten Phasen der Nutzungsdauer.
Dieses Dokument umfasst die folgenden Maschinentypen(siehe Anhang J):
   hydraulische Gesenkbiegepressen;
   hydraulische Gesenkbiegepressen mit Servoantrieb;
   Spindelgesenkbiegepressen mit Servoantrieb;
   Riemen-Feder-Gesenkbiegepressen mit Servoantrieb.
Die Anforderungen in diesem Dokument berücksichtigen die bestimmungsgemäße Verwendung, wie in ISO 12100:2010, 3.23, definiert ebenso wie eine vernünftigerweise vorhersehbare Fehlanwendung, wie in ISO 12100:2010, 3.24, definiert. Dieses Dokument geht davon aus, dass ein Zugang zur Gesenkbiegepresse von allen Richtungen erfolgen kann, beschäftigt sich mit allen in Abschnitt 4 beschriebenen signifikanten Gefährdungen während der verschiedenen Phasen der Nutzungsdauer der Maschine und spezifiziert die Sicherheitsmaßnahmen sowohl für den Bediener als auch für andere exponierte Personen.
ANMERKUNG 2   Alle signifikanten Gefährdungen bedeutet solche, die zum Zeitpunkt der Veröffentlichung dieses Dokumentes festgestellt oder mit Gesenkbiegepressen in Verbindung gebracht werden.
Dieses Dokument gilt für die Konstruktion von Gesenkbiegepressen, die sowohl selbständig oder in Kombination (z. B. zwei oder mehr Maschinen parallel) arbeiten als auch als Anleitung für die Konstruktion von Gesenkbiegepressen, die zur Integration in ein Fertigungssystem bestimmt sind.
Dieses Dokument behandelt signifikante Gefährdungen, Gefährdungssituationen und Ereignisse, die für Gesenkbiegepressen und Zusatzeinrichtungen (siehe Abschnitt 4) relevant sind. Dieses Dokument legt die in diesem Abschnitt definierten Sicherheitsanforderungen für Gesenkbiegepressen fest.
Dieses Dokument befasst sich nicht mit Gesenkbiegepressen, die Energie übertragen, um Balkenbewegung pneumatisch oder durch mechanische Kupplung weiterzuleiten, oder Gesenkbiegepressen, die eine Kombination von Technologien (z. B. Kombination aus hydraulischer Gesenkbiegepresse und Spindelgesenkbiegepresse mit Servoantrieb oder Kombination aus hydraulischer Gesenkbiegepresse mit Servoantrieb und Spindelgesenkbiegepresse mit Servoantrieb) nutzen.
Dieses Dokument gilt nicht für Maschinen, deren Konstruktion folgenden Hauptzwecken dient:
a)   Schwenkbiegen von Tafelmaterial;
b)   Biegen von Rohren durch Schwenkbewegung;
c)   Rundbiegen zwischen Walzen.
Dieses Dokument behandelt nicht die Gefährdungen, die infolge des Betreibens von Gesenkbiegepressen in explosionsgefährdeten Umgebungen auftreten können.
Dieses Dokument ist nicht anwendbar auf Gesenkbiegepressen, die vor dem Veröffentlichungsdatum hergestellt wurden.
Dieses Dokument deckt keine Sicherheitsaspekte in Bezug auf automatische Beschickung und Entnahme ab, sofern angegeben. Eine Hilfestellung zur Berücksichtigung zusätzlicher Einrichtungen für automatische Beschickung und Entnahme kann ISO 11161:2007 entnommen werden.

Sécurité des machines outils - Presses plieuses (ISO/DIS 6909:2023)

Varnost obdelovalnih strojev - Zavore stiskalnic (ISO/DIS 6909:2023)

General Information

• Status: Not Published
• Publication Date: 24-Jun-2025
• ICS: 13.110 - Safety of machinery
• ICS: 25.080.01 - Machine tools in general
• Technical Committee: CEN/TC 143 - Machine tools - Safety
• Drafting Committee: CEN/TC 143/WG 1 - Metal forming machine tools - Safety
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 13-Nov-2024
• Due Date: 09-Apr-2024
• Completion Date: 13-Nov-2024
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive: 2023/1230 - Regulation (EU) 2023/1230 of the European Parliament and of the Council of 14 June 2023 on machinery and repealing Directive 2006/42/EC of the European Parliament and of the Council and Council Directive 73/361/EEC (Text with EEA relevance)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: oSIST prEN ISO 6909:2024 - Machine tools Safety - Press brakes (ISO/DIS 6909:2023)

Relations

• Revises: EN 12622:2009+A1:2013 - Safety of machine tools - Hydraulic press brakes
• Effective Date: 06-Mar-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2024
Varnost obdelovalnih strojev - Zavore stiskalnic (ISO/DIS 6909:2023)
Machine tools Safety - Press brakes (ISO/DIS 6909:2023)
Werkzeugmaschinen-Sicherheit - Gesenkbiegepressen (ISO/DIS 6909:2023)
Sécurité des machines outils - Presses plieuses (ISO/DIS 6909:2023)
Ta slovenski standard je istoveten z: prEN ISO 6909
ICS:
13.110 Varnost strojev Safety of machinery
25.080.01 Stroji na splošno Machine tools in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 6909
ISO/TC 39/SC 10 Secretariat: SNV
Voting begins on: Voting terminates on:
2023-11-30 2024-02-22
Machine tools Safety — Press brakes
Sécurité des machines outils — Presses plieuses
ICS: 25.080.01; 13.110
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 6909:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

ISO/DIS 6909:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 6909
ISO/TC 39/SC 10 Secretariat: SNV
Voting begins on: Voting terminates on:

Machine tools Safety — Press brakes
Sécurité des machines outils — Presses plieuses
ICS: 25.080.01; 13.110
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: [phone]
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: [e-mail]
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 6909:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

ISO/DIS 6909:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 4
4 List of significant hazards .14
5 Safety requirements and/or measures .14
5.1 General . 14
5.2 Protection of mechanical hazards . 15
5.2.1 Description of the safeguarding of access to moving parts .15
5.2.2 Location of the safeguarding of access to moving parts . .26
5.3 Control systems .28
5.3.1 General .28
5.3.2 Manual control devices .28
5.3.3 Failure of power supply .29
5.3.4 Protection against external influences .29
5.3.5 Safety functions .29
5.3.6 Other functions .54
5.3.7 Use of electronic components .56
5.4 Mode of operation . 56
5.4.1 Description of the various modes of operation .56
5.4.2 Setting mode .56
5.4.3 Production modes . 57
5.5 Consideration of basic design and other mechanical hazards . 57
5.5.1 Prevention of unintended gravity fall of the beam (down stroking press
brakes) . 57
5.5.2 Stability of the press brake .58
5.5.3 Stability of the workpiece.58
5.5.4 Risk of break up during operation .58
5.5.5 Tool holder and tool design .58
5.5.6 Access to raised work stations or platforms .58
5.5.7 Slips, trips and falls .58
5.5.8 Release of trapped persons .58
5.5.9 Safeguarding of drives, transmission machinery and ancillary devices . 59
5.6 Protection against non-mechanical hazard . 59
5.6.1 Noise . 59
5.6.2 Electrical hazards. 61
5.6.3 Ergonomics . 61
5.6.4 Hydraulic and pneumatic systems . 61
5.6.5 Thermal hazards . 62
5.6.6 Hazards generated by materials and substances. 62
5.6.7 Hazards generated by lasers.63
5.6.8 High pressure fluid ejection hazards .63
5.6.9 Isolation and energy dissipation .63
5.6.10 Maintenance .63
5.6.11 Errors of fitting .63
6 Verification of the safety requirements and/or protective measures .63
7 Information for use .67
7.1 Marking . 67
7.1.1 General . 67
7.1.2 Content . 67
7.2 Instruction handbook.68
iii
ISO/DIS 6909:2023(E)
7.2.1 General .68
7.2.2 Content .68
Annex A (informative) Significant hazards, hazardous situations and protective measures .70
Annex B (normative) Calculation of minimum distances .74
Annex C (normative) The overall response time of the press brake stopping performance .77
Annex D (informative) Example of redundant and monitored hydraulic control circuits for
a down-stroking press brake.78
Annex E (normative) Conditions for noise measurement of press brakes .80
Annex F (informative) Side safeguarding for press brakes with manually loaded and/or
unloaded .81
Annex G (informative) Markings .82
Annex H (normative) Laser actuated AOPD system tests .83
Annex I (informative) Bending speed .
...