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1. (WO2019048172) METHOD AND DEVICE FOR LASER WELDING ONE OR MORE STEEL SHEETS MADE OF PRESS-HARDENABLE STEEL
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2019/048172 International Application No.: PCT/EP2018/071571
Publication Date: 14.03.2019 International Filing Date: 09.08.2018
IPC:
B23K 26/12 (2014.01) ,B23K 35/365 (2006.01) ,B23K 26/14 (2014.01) ,B23K 26/24 (2014.01) ,B23K 35/02 (2006.01) ,B23K 26/144 (2014.01) ,B23K 26/70 (2014.01) ,B23K 101/18 (2006.01) ,B23K 101/34 (2006.01) ,B23K 103/04 (2006.01) ,B23K 103/20 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
12
in a special atmosphere, e.g. in an enclosure
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
35
Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
22
characterised by the composition or nature of the material
36
Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
365
Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
14
using a flow, e.g. a jet of gas, in conjunction with the laser beam
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26
Working by laser beam, e.g. welding, cutting, boring
20
Bonding, e.g. welding
24
Seam welding
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
35
Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
02
characterised by mechanical features, e.g. shape
[IPC code unknown for B23K 26/144][IPC code unknown for B23K 26/70]
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
101
Articles made by soldering, welding or cutting
18
Sheet panels
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
101
Articles made by soldering, welding or cutting
34
Coated articles
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
103
Materials to be soldered, welded or cut
02
Iron or ferrous alloys
04
Steel alloys
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
103
Materials to be soldered, welded or cut
18
Dissimilar materials
20
Ferrous alloys and aluminium or alloys thereof
Applicants:
WISCO TAILORED BLANKS GMBH [DE/DE]; Mannesmannstr. 101 47259 Duisburg, DE
Inventors:
VON DER HEYDT, Jana; DE
BOTH, Christian; DE
KESSLER, Michael; DE
Agent:
COHAUSZ & FLORACK PATENT- UND RECHTSANWÄLTE PARTNERSCHAFTSGESELLSCHAFT MBB; Bleichstraße 14 40211 Düsseldorf, DE
Priority Data:
10 2017 120 611.607.09.2017DE
Title (EN) METHOD AND DEVICE FOR LASER WELDING ONE OR MORE STEEL SHEETS MADE OF PRESS-HARDENABLE STEEL
(FR) PROCÉDÉ ET DISPOSITIF POUR LE SOUDAGE LASER D’UNE OU PLUSIEURS TÔLES EN ACIER FAITES EN ACIER DURCISSABLE PAR PRESSION
(DE) VERFAHREN UND VORRICHTUNG ZUM LASERSCHWEISSEN EINES ODER MEHRERER STAHLBLECHE AUS PRESSHÄRTBAREM STAHL
Abstract:
(EN) The invention relates to a method and to a device for fusion-welding one or more steel sheets (1, 2; 2') made of press-hardenable steel, preferably manganese-boron steel, in which method the fusion welding is performed with supply of filler wire (11) into the weld pool (9) produced exclusively by means of a laser beam (6). In order to improve the hardenability of the weld seam, regardless of whether the steel sheets to be welded to one another are steel sheets of identical or different material quality, according to the invention the filler wire (11) is coated with graphite particles prior to the fusion welding and the filler wire (11) thus coated is introduced directly into the weld pool (9) in such a way that the tip of the filler wire (11) melts in the weld pool (9), the graphite particles being mixed with a waxy or liquid carrier means in order to be applied to the filler wire (11), and the mixture being applied in the form of a coating (11.1) to the filler wire (11). The method according to the invention and the corresponding device are distinguished by a high productivity and a relatively low energy consumption. The method can be implemented with a relatively low equipment outlay.
(FR) L’invention concerne un procédé ainsi qu’un dispositif pour le soudage par fusion d’une ou plusieurs tôles en acier (1, 2 ; 2') faites en acier durcissable par pression, de préférence en acier manganèse-bore, dans lequel le soudage par fusion est effectué avec apport d’un fil d’apport (11) dans le bain de fusion (9) généré exclusivement au moyen d’un rayon laser (6). Pour améliorer l’aptitude à la trempe du joint de soudure, que les tôles en acier à souder soient des tôles en acier de qualité de matériaux égale ou différente, le fil d’apport (11) est revêtu de particules de graphite avant le soudage par fusion et le fil d’apport (11) ainsi revêtu est introduit directement dans le bain de fusion (9) de telle façon que la pointe du fil d’apport (11) fond dans le bain de fusion (9), les particules de graphite à appliquer sur le fil d’apport (11) étant mélangées avec un véhicule cireux ou liquide et le mélange étant appliqué en tant que revêtement (11.1) sur le fil d’apport (11). Le procédé selon l’invention et le dispositif correspondant se caractérisent par une productivité élevée ainsi qu’une consommation d’énergie relativement faible. Le procédé peut être mis en œuvre avec relativement peu de moyens du point de vue technique.
(DE) Beschrieben wird ein Verfahren sowie eine Vorrichtung zum Schmelzschweißen eines oder mehrerer Stahlbleche (1, 2; 2'] aus presshärtbarem Stahl, vorzugsweise Mangan- Bor-Stahl, bei dem das Schmelzschweißen unter Zuführung von Zusatzdraht (11) in das ausschließlich mittels eines Laserstrahls (6) erzeugte Schmelzbad (9) erfolgt. Um die Härtbarkeit der Schweißnaht zu verbessern, unabhängig davon, ob es sich bei den miteinander zu verschweißenden Stahlblechen um Stahlbleche gleicher oder verschiedener Werkstoffgüte handelt, schlägt die Erfindung vor, dass der Zusatzdraht (11) vor dem Schmelzschweißen mit Graphitpartikeln beschichtet wird und der so beschichtete Zusatzdraht (11) direkt in das Schmelzbad (9) derart eingeführt wird, dass die Spitze des Zusatzdrahtes (11) im Schmelzbad (9) schmilzt, wobei die Graphitpartikel zum Aufbringen auf den Zusatzdraht (11) mit einem wachsförmigen oder flüssigen Trägermittel gemischt werden und das Gemisch als Beschichtung (11.1) auf den Zusatzdraht (11) aufgebracht wird. Das erfindungsgemäße Verfahren und die entsprechende Vorrichtung zeichnen sich durch eine hohe Produktivität sowie einen vergleichsweise geringen Energieverbrauch aus. Das Verfahren lässt sich anlagentechnisch mit relativ geringem Aufwand umsetzen.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: German (DE)
Filing Language: German (DE)