EN 4678:2011

Aerospace series - Weldments and brazements for aerospace structures - Joints of metallic materials by laser beam welding - Quality of weldments

This standard defines the rules to be observed to ensure the quality of aerospace structures in metallic materials by (solid code 521 and gas code 522 and diode laser Semi-conductor 523 according to EN ISO 4063:2009) laser beam welding, implemented automatically, semi-automatically or manually.
It is applicable without any restriction for the manufacturing of new parts or repair parts, these operations being under the responsibility of an approved Design Authority or repairer.

Luft- und Raumfahrt - Schweiß- und Lötverbindungen für die Luft- und Raumfahrt - Verbindungen metallischer Werkstoffe mittels Laserstrahlschweißen - Qualität der Schweißverbindungen

Série aérospatiale - Assemblages soudés et brasés pour constructions aérospatiales - Assemblages de matériaux métalliques soudés par faisceaux laser - Qualité des assemblages soudés

La présente Norme Européenne définit les règles à observer pour garantir la qualité des constructions aérospatiales en matériaux métalliques soudées par faisceaux laser (solide code 521 et gaz code 522 et diode laser à semi conducteur 523 selon l'EN ISO 4063), appliqués automatiquement, semi-automatiquement ou manuellement.
Elle s'applique sans restriction pour la fabrication de pièces neuves ou de rechanges, ces opérations étant placées sous la responsabilité d'un concepteur ou d'un réparateur agréé.

Aeronavtika - Varjeni in trdo spajkani sestavi za konstrukcije v aeronavtiki - Spoji kovinskih materialov pri varjenju z laserskim snopom - Kakovost varjenih sestavov

Ta standard določa pravila, ki jih je treba upoštevati, da zagotovimo kakovost konstrukcij v aeronavtiki in kovinskih materialov pri (koda trdote 521, koda plina 522 in polprevodnik laserske diode 523 v skladu z EN ISO 4063:2009) varjenju z laserskim snopom, izvedenim avtomatsko, polavtomatsko ali ročno.
Uporaben je brez omejitev za proizvodnjo novih delov ali popravila delov, če so te operacije v pristojnosti odobrenega organa za načrtovanje ali serviserja.

General Information

• Status: Published
• Publication Date: 19-Jul-2011
• Withdrawal Date: 30-Jan-2012
• ICS: 25.160.40 - Welded joints and welds
• ICS: 49.025.05 - Ferrous alloys in general
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4 - Metallic
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Completion Date: 01-Jun-2017
• Ref Project: SIST EN 4678:2011 - Aerospace series - Weldments and brazements for aerospace structures - Joints of metallic materials by laser beam welding - Quality of weldments

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aeronavtika - Varjeni in trdo spajkani sestavi za konstrukcije v aeronavtiki - Spoji kovinskih materialov pri varjenju z laserskim snopom - Kakovost varjenih sestavovLuft- und Raumfahrt - Schweiß- und Lötverbindungen für die Luft- und Raumfahrt - Lasers strahlschweißen - Qualität der SchweißverbindungenSérie aérospatiale - Assemblages soudés et brasés pour constructions aérospatiales - Assemblages de matériaux métalliques soudés par faisceaux laser - Qualité des assemblages soudésAerospace series - Weldments and brazements for aerospace structures - Joints of metallic materials by laser beam welding - Quality of weldments49.025.05Železove zlitine na splošnoFerrous alloys in generalICS:Ta slovenski standard je istoveten z:EN 4678:2011SIST EN 4678:2011en01-december-2011SIST EN 4678:2011SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4678
July 2011 ICS 49.025.05 English Version
Aerospace series - Weldments and brazements for aerospace structures - Joints of metallic materials by laser beam welding - Quality of weldments
Série aérospatiale - Assemblages soudés et brasés pour constructions aérospatiales - Assemblages de matériaux métalliques soudés par faisceaux laser - Qualité des assemblages soudés
Luft- und Raumfahrt - Schweiß- und Lötverbindungen für die Luft- und Raumfahrt - Laserstrahlschweißen - Qualität der Schweißverbindungen This European Standard was approved by CEN on 9 July 2010.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4678:2011: ESIST EN 4678:2011

1) Published as ASD-STAN Prestandard at the date of publication of this standard by Aerospace and Defense Industries Association of Europe-Standardization (ASD-STAN), (www.asd-stan.org).
Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2010) ISO 22826, Destructive tests on welds in metallic materials — Hardness testing of narrow joints welded by laser and electron beam (Vickers and Knoop hardness tests) EN ISO 22827-1, Acceptance tests for Nd:YAG laser beam welding machines — Machines with optical fibre delivery — Part 1: Laser assembly (ISO 22827-1:2005) EN ISO 22827-2, Acceptance tests for Nd:YAG laser beam welding machines — Machines with optical fibre delivery — Part 2: Moving mechanism (ISO 22827-2:2005) ISO 24394, Welding for aerospace applications — Qualification test for welders and welding operators — Fusion welding of metallic components ISO/TR 25901, Welding and related processes — Vocabulary NAS 410, Certification and qualification of non-destructive test personnel 2)
2) Published by: National Standards Association, Inc., 1200 Quince Orchard Blvd, Gaithersburg, MD 20878, United States. SIST EN 4678:2011

3.2.1.3 Firing distance Distance between the impact point of the beam on detail parts and a reference surface linked to the machine EXAMPLE End of nozzle. 3.2.1.4 Specific welding energy Ratio between the beam power over the welding speed, multiplied by 60. Paverage (W) is measured at nozzle exit side.
J/cm)(k(cm/min)000160)(averageaverageVWPE××= SIST EN 4678:2011

Figure 1 3.2.1.6 Slope (or ramp) up Controlled increase of the beam power at the beginning of the welding 3.2.1.7 Clearance before welding Distance measured on a straight section of the joint between the sides to weld. NOTE The clearance depends on the design of the welded joint (for circular axial welds or circular welds see EN 1011-6). 3.2.1.8 Focusing level Distance between the beam impact point on the detail parts and the focusing point. NOTE Conventionally, this distance is negative when the focusing point is within the detail parts, see Figure 2. SIST EN 4678:2011

Key 1 Positive focusing level (+ 1 mm) 2 Focusing level 0 3 Negative focusing level (− 1 mm) 4 Firing distance 5 Detail part Figure 2 3.2.1.9 Beam power The laser beam power is measured with a calorimeter which absorbs all or part of the beam
3.2.1.10 Welding speed Length of the weld on beam impact side produced per time unit. 3.2.2 Other technical terms 3.2.2.1 Welding campaign Series of welding operations on identical parts, executed on the same machine, without any changes to adjustments, without performing other welds on the machine, without interrupting manufacturing for more than a week (working days). 3.2.2.2 Tacking pass Pre-assembling of elementary detail parts using the same process as the one used for welding, consisting of making slightly penetrating, narrow weld, continuous or discontinuous along the joint plane. The purpose is to maintain detail parts in position. SIST EN 4678:2011
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