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1. WO2020117130 - IMPROVING SURFACE ROUGHNESS WITH A LASER

Publication Number WO/2020/117130
Publication Date 11.06.2020
International Application No. PCT/SI2019/050020
International Filing Date 23.09.2019
IPC
B23K 26/352 2014.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
352for surface treatment
B23K 26/0622 2014.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06Shaping the laser beam, e.g. by masks or multi-focusing
062by direct control of the laser beam
0622by shaping pulses
B23K 26/06 2014.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06Shaping the laser beam, e.g. by masks or multi-focusing
B23K 103/04 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
103Materials to be soldered, welded or cut
02Iron or ferrous alloys
04Steel alloys
CPC
B23K 2103/05
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
2103Materials to be soldered, welded or cut
02Iron or ferrous alloys
04Steel or steel alloys
05Stainless steel
B23K 26/0622
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06Shaping the laser beam, e.g. by masks or multi-focusing
062by direct control of the laser beam
0622by shaping pulses
B23K 26/0626
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06Shaping the laser beam, e.g. by masks or multi-focusing
062by direct control of the laser beam
0626Energy control of the laser beam
B23K 26/355
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
352for surface treatment
355Texturing
B23K 26/3576
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
352for surface treatment
3568Modifying rugosity
3576Diminishing rugosity, e.g. grinding; Polishing; Smoothing
Applicants
  • INTECH-LES, RAZVOJNI CENTER, D.O.O. [SI]/[SI]
  • TKC D.O.O. [SI]/[SI]
Inventors
  • POMPE, Klemen
  • TUŠEK, Janez
  • VIRANT, Mitja
  • IVANČIČ, Robert
Agents
  • ITEM D.O.O.
Priority Data
P-20180026407.12.2018SI
Publication Language English (EN)
Filing Language Slovenian (SL)
Designated States
Title
(EN) IMPROVING SURFACE ROUGHNESS WITH A LASER
(FR) AMÉLIORATION DE LA RUGOSITÉ DE SURFACE AU MOYEN D'UN LASER
Abstract
(EN)
The invention relates to a process for improving the roughness of a preferably laser-welded surface of austenitic stainless steel, by re-passing the weld by changing the welding parameters and using the same welding equipment. With the laser in pulse mode, the energy flow of one pulse can be determined via the user interface. The pulse shape represents the energy flow of a laser beam over a single pulse. The pulse shape in the selected time interval to improve the surface roughness, preferably of austenitic stainless-steel welds, is as follows: the whole pulse consists of a huge number of subpulses. The subpulses are at two different time intervals; shorter and longer and two set laser beam powers in a pulse. Subpulses of different lengths and laser pulse strength make up the combinations of subpulses A, B and C, which are repeated in the ABBBC sequence until the end of the entire pulse. The result of such a pulse shape is the improvement of surface roughness for at least two quality classes defined in SIST EN ISO1302.
(FR)
L'invention concerne un procédé pour améliorer la rugosité d'une surface, de préférence soudée au laser, d'acier inoxydable austénitique, par une nouvelle passe de soudage en changeant les paramètres de soudage et en utilisant le même équipement de soudage. Avec le laser en mode pulsé, le flux d'énergie d'une impulsion peut être déterminé par l'intermédiaire de l'interface utilisateur. La forme d'impulsion représente le flux d'énergie d'un faisceau laser sur une seule impulsion. La forme d'impulsion dans l'intervalle de temps sélectionné pour améliorer la rugosité de surface, de préférence de soudures en acier inoxydable austénitique, est la suivante : l'impulsion entière est constituée d'un nombre considérable de sous-impulsions. Les sous-impulsions sont à deux intervalles de temps différents (plus court et plus long) et deux puissances de faisceau laser sont réglées dans une impulsion. Des sous-impulsions de longueur et d'intensité d'impulsion laser différentes constituent les combinaisons de sous-impulsions A, B et C, qui sont répétées dans la séquence ABBBC jusqu'à la fin de l'intégralité de l'impulsion. Le résultat d'une telle forme d'impulsion est l'amélioration de la rugosité de surface pour au moins deux classes de qualité définies dans la norme SIST EN ISO1302.
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