EP4594043A1 - Machine de soudage à faisceau laser - Google Patents
Machine de soudage à faisceau laserInfo
- Publication number
- EP4594043A1 EP4594043A1 EP23798496.8A EP23798496A EP4594043A1 EP 4594043 A1 EP4594043 A1 EP 4594043A1 EP 23798496 A EP23798496 A EP 23798496A EP 4594043 A1 EP4594043 A1 EP 4594043A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- welding machine
- laser beam
- welding
- welded
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/035—Aligning the laser beam
- B23K26/037—Aligning the laser beam by pressing on the workpiece, e.g. using a pressing roller foot
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0643—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising mirrors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special environment or atmosphere, e.g. in an enclosure
- B23K26/127—Working by laser beam, e.g. welding, cutting or boring in a special environment or atmosphere, e.g. in an enclosure in an enclosure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special environment or atmosphere, e.g. in an enclosure
- B23K26/127—Working by laser beam, e.g. welding, cutting or boring in a special environment or atmosphere, e.g. in an enclosure in an enclosure
- B23K26/128—Laser beam path enclosures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/244—Overlap seam welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/26—Seam welding of rectilinear seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
- B23K26/704—Beam dispersers, e.g. beam wells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
- B23K37/0217—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track the guide member being fixed to the workpiece
- B23K37/0223—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track the guide member being fixed to the workpiece the guide member being a part of the workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0282—Carriages forming part of a welding unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/12—Vessels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
- B23K2103/26—Alloys of Nickel and Cobalt and Chromium
Definitions
- the present invention relates to welding machines making it possible to weld together constituent parts of a transport tank, for example liquefied gas.
- Current welding machines include drive wheels as well as a drive member capable of rotating at least the drive wheels along the parts to be welded.
- welding machines include welding rolls in order to weld the parts to be welded.
- the welding wheels are supplied with electric current when the welding machine moves by means of an electric current unit, ensuring the welding of the parts to be welded.
- Roll welding is particularly effective for welding parts to be welded made of InvarTM.
- InvarTM has interesting resistance properties, particularly for use in a transport tank, for example liquefied gas, and makes it possible, among other things, to guarantee optimal transport of said liquefied gas.
- invarTM is expensive and its use therefore generates significant manufacturing costs for the manufacturer.
- new alloys are trying to be used to replace invarTM.
- an alloy with a high manganese content makes it possible to replace invarTM in tanks, and has an expansion coefficient between that of invarTM and that of stainless steel, but with a lower cost.
- such an alloy with a high manganese content is complex to weld with current welding machines.
- the aim of the present invention is therefore to provide a welding machine capable of welding alloys with a high manganese content while maintaining a compact welding machine.
- the invention therefore relates to a laser beam welding machine for at least two parts to be welded, configured to be mobile along said parts to be welded, the welding machine extending in a direction of main longitudinal elongation and comprising at least one pair of drive wheels intended to set said machine in motion welding with respect to the parts to be welded, the welding machine comprising at least one device for welding by laser beam of the at least two parts to be welded, the welding device comprising at least one means intended to channel a laser beam capable of welding the parts to weld.
- the welding machine according to the invention can be used for example to weld two raised edges together and/or with an anchoring wing of a waterproof membrane constituting a wall of a storage and/or transport tank.
- cryogenic products such as liquefied natural gas.
- the welding machine can weld raised edges of two adjacent parts named, first part to be welded and second part to be welded, in order to form the waterproof membrane of the wall of the cryogenic product storage and/or transport tank.
- the welding machine can weld at least one of the raised edges with the anchoring wing, forming a third part to be welded, placed between the two raised edges of the two adjacent parts.
- the part to be welded may be one of the raised edges or the anchoring wing.
- the welding machine comprises at least the pair of drive wheels ensuring, by means of a drive member, the movement of the welding machine along the parts to be welded in a rectilinear welding direction, otherwise called the direction of advancement of the welding machine.
- the drive member may for example be an electric, hydraulic, pneumatic or even mechanical drive member.
- the drive member in the context of the invention is an electric motor.
- the advantage of using a laser beam to weld the parts to be welded is that it allows alloys such as alloys with a high manganese content to be welded.
- the invention proposes a compact welding machine capable of welding a greater diversity of alloys and also allowing alloys of different nature to be welded together.
- the welding machine comprises at least one drive member capable of rotating at least one of the drive wheels.
- the means intended to channel the laser beam comprises at least one focusing lens, a reflection member and at least one conduit of circulation surrounding the laser beam.
- the focusing lens makes it possible to focus the laser beam conveyed, for example, by means of an optical fiber.
- the circulation conduit also makes it possible to protect a circulation path of the laser beam so that the latter is not disturbed by the external environment.
- the reflection member makes it possible, among other things, to reflect the laser beam without modifying its focal length.
- Such an optical fiber can be a component of the welding machine in that it carries the laser beam to the focusing lens.
- this optical fiber is a dual-core fiber.
- Such an optical fiber has a fiber core, otherwise called an internal fiber, which channels the high-power laser beam, and a peripheral fiber at the fiber core, otherwise called an external fiber which surrounds the internal fiber. The laser beam is channeled into this external optical fiber and its power is lower than that carried by the internal optical fiber.
- the laser beam according to the invention can be characterized in that it comprises a beam core and a ring surrounding the beam core.
- the beam core channels a portion of the beam that is more powerful than another portion of the beam channeled by the ring.
- the beam core channels a portion of the beam that is less powerful than another portion of the beam channeled by the ring.
- Such a laser beam having a beam core and a ring makes it possible to limit projections near the weld bead.
- Such a beam has a second advantage by making it possible to obtain a wider final weld bead, without having to oscillate the laser beam, such an option also tending to increase projections.
- the reflection member(s) are for example a mirror.
- the welding machine comprises means for adjusting the position of the reflection member, which makes it possible to adjust the positioning of the laser beam on the parts to be welded.
- the reflection member comprises at least one material resistant to the heat of the laser beam, such material being in particular quartz.
- the reflection member may comprise a cooling system configured to maintain the temperature of the reflection member below a temperature threshold.
- the laser beam circulation conduit extends from the focusing lens to at least one welding zone of the parts to be welded.
- the welding zone corresponds to the area of the parts to be welded intended to receive the laser beam. We also understand that the welding zone evolves as the welding machine advances along the parts to be welded.
- the reflection member is arranged in the circulation conduit between the focusing lens and the welding zone.
- the means intended to channel the laser beam comprises a plurality of reflection members, in particular three reflection members.
- each of them is for example arranged so as to orient the laser beam in an output direction orthogonal, or generally orthogonal, to an input direction of the laser beam, the latter being the direction along which the laser beam extends before it hits the reflecting member.
- the welding machine is configured so that the focusing lens is arranged vertically above a weld bead to be produced by the laser beam welding device.
- the laser beam directly coming from the focusing member extends in a plane in which inscribes at least one of the raised edges.
- the invention makes it possible to return such a laser beam so that it attacks the raised edge along a direction substantially perpendicular to a plane in which at least the raised edge fits.
- Such an organization of the reflection members and/or the focusing lens makes it possible to provide a more compact welding machine, with improved ergonomics. This organization makes it possible to produce a welding machine that is lower and narrower than known machines.
- the circulation conduit is bent in such a way as to form an angular portion of the circulation conduit, the reflection member being arranged in the angular portion of the circulation conduit.
- the reflection member is configured in such a way as to modify the trajectory of the laser beam in the circulation conduit so that it corresponds to the shape of the circulation conduit.
- the welding device comprises at least one housing forming a chamber around the welding zone, the housing being arranged at one end of the circulation conduit, opposite the focusing lens.
- a neutral gas is distributed in the chamber formed by the housing, at least at the welding zone.
- the welding device comprises at least one pair of pressure rollers intended to press the parts to be welded against each other at the welding zone.
- the pressure rollers are intended to press the parts to be welded together with a maximum clearance between sheets of 0.2mm. Furthermore, the pressure rollers are arranged in the chamber delimited by the housing.
- a pair of pressure rollers means two pressure rollers arranged on either side of the parts to be welded along a straight line perpendicular to a plane of the parts to be welded.
- the pressure rollers can be cooled.
- the laser beam falls into a plane in which an axis of rotation of the at least two pressure rollers passes.
- the welding device comprises an element for receiving the laser beam arranged in the housing and configured to be cooled.
- the laser beam receiving element makes it possible to absorb the residual optical energy of the laser beam and is connected to a cooling circuit in order to cool it.
- the parts to be welded are arranged between the reflection member and the receiving element according to the trajectory of the laser beam. We then understand that the receiving element absorbs the residue of the laser beam once it has passed through the welding zone.
- the receiving element is made of a metallic or ceramic material.
- the laser beam receiving element is configured to absorb a residual part of the laser beam after its passage through the parts to be welded.
- the welding device comprises another pair of pressure rollers on the other side of the welding zone, the laser beam falling in a plane in which the axis of rotation of the at least two pairs of pressure rollers.
- the focusing lens of the welding device is connected to an optical energy source external to the welding machine, in particular by an optical fiber.
- the laser beam has a power of between 1200W and 6000 W.
- the power of the laser beam is between 1250W and 6000W.
- the power of the laser beam is between 1250W and 2500W.
- the drive wheels are configured to move the welding machine along the parts to be welded at a speed of between 2m/min and 8m/min.
- the speed of advancement of the welding machine is between 2m/min and 5.5m/min.
- the forward speed of the welding machine is between 2m/min and 4.8m/min.
- the driving wheels each extend in a intersecting plane relative to a plane of the parts to be welded, the intersecting plane of at least one of the driving wheels being distinct from a plane perpendicular to the plane of the parts to be welded.
- At least two pairs of drive wheels are arranged on either side of the housing of the welding device in a longitudinal direction of the welding machine.
- the pairs of drive wheels are desynchronized in rotation relative to each other.
- the two pairs of drive wheels are capable of being rotated by the drive member at different speeds from each other.
- FIG 1 is a general perspective view of a welding machine according to the invention capable of welding parts to be welded;
- FIG 2 is a close-up view of a welding device of the welding machine of Figure 1;
- FIG 3 is a close-up view of another embodiment of the means intended to channel the laser beam
- FIG 4 is a close-up view of a housing of the welding device in Figure 2.
- Figure 1 illustrates a welding machine 1 configured to move along at least two parts to be welded 2. More precisely, the parts to be welded 2 are for example strips and constitute a waterproof membrane 6 of a wall 8 of a storage and/or transport tank for products maintained in the liquid state at a temperature below -100°C at atmospheric pressure, for example liquefied natural gas.
- the welding machine 1 can for example make it possible to weld directly against each other a first raised edge 4 and a second raised edge 4 respectively of a first part to be welded 2a and a second adjacent part to be welded 2b.
- the welding machine can weld at least one of the raised edges 4 of one of the first part to be welded 2a and/or the second part to be welded 2b, with an anchoring wing 12 forming a third part to be welded visible in Figures 2 and 4, said anchoring wing 12 being arranged between two adjacent raised edges.
- the anchoring wing 12 is anchored to an insulator belonging to the tank wall and is arranged between two adjacent raised edges.
- Such welding of at least two of the parts to be welded 2a, 2b forms a weld bead 14, visible in Figures 2 to 4, on at least one of the first raised edge 4 and/or the second raised edge, extending the along a welding axis S.
- the weld bead 14 formed between the at least two parts to be welded 2 makes it possible, among other things, to ensure sealing between said parts to be welded 2, and thus contributes to the sealing of the membrane 6 constituting the wall 8 of the tank storage and/or transport of cryogenic products.
- the welding machine 1 illustrated in Figure 1 comprises at least one body 16 which has a substantially parallelepiped shape and which extends in a direction of main elongation parallel to a longitudinal direction L of the welding machine 1.
- the body 16 of the welding machine 1 comprises in particular a front end 18 and a rear end 20, opposite each other in the longitudinal direction L of the welding machine 1. It is also understood that the notion of front/rear of the welding machine 1 body 16 of the welding machine 1 refers to a direction of advancement A of the welding machine 1 along the parts to be welded 2, parallel to the welding axis S and to the longitudinal direction L of said welding machine 1.
- the body 16 of the welding machine 1 comprises an upper face 22 and a lower face 24, opposite each other in a vertical direction V of the welding machine 1, perpendicular to its longitudinal direction L, the lower face 24 being the face of the body 16 of the welding machine 1 facing the parts to be welded 2.
- the welding machine 1 according to the invention, visible in Figure 1, comprises at least one pair of drive wheels 26 intended to set the welding machine 1 in motion relative to the parts to be welded 2, and at least one member drive wheel, not visible, capable of rotating at least one pair of drive wheels 26.
- the at least one pair of drive wheels 26 is arranged at the lower face 24 of the body 16 of the welding machine 1 such that it is in contact with at least one of the parts to be weld 2.
- the rotation of the at least one pair of drive wheels 26 operated by the drive member allows said pair of drive wheels 26, arranged in contact with the parts to be welded 2, to generate the movement of the welding machine 1 along the parts to be welded 2 following a rectilinear translational movement parallel to the direction of advancement A of the welding machine 1.
- each of the wheels of the pair of drive wheels 26 is in contact with one of the parts to be welded 2.
- the welding machine 1 comprises a first pair of wheels drive wheels 26a and a second pair of drive wheels 26b arranged respectively at the front end 18 and at the rear end 20 of the body 16 of the welding machine 1. It is further understood that the drive wheels 26 of each pair of drive wheels 26a, 26b are opposed to each other in a transverse direction T of the welding machine 1, perpendicular to the longitudinal direction L and vertical V. Thus, the drive wheels 26 of the same pair of drive wheels extend on either side of the parts to be welded 2.
- the drive wheels each extend in a plane intersecting with respect to a plane of the parts to be welded 2, and for at least one of the drive wheels the plane in which it is extends is perpendicular to the plane of one of the raised edges 4.
- the welding machine 1 comprises at least one drive member ensuring the rotation of the drive wheels 26 and which can take the form of an electric, hydraulic, pneumatic or even mechanical drive member.
- the drive member according to the invention is an electric motor.
- the welding machine 1 comprises at least one device 30 for welding the at least two parts to be welded 2, visible in Figure 1.
- the welding device 30 comprises in particular at least one means 32 intended to channel a laser beam 34 in such a way as to weld the parts to be welded 2.
- the welding device 30 will now be described in more detail using Figures 2 to 4.
- the welding device 30 comprises the means 32 intended to channel the laser beam 34 consisting of at least one focusing lens 36, a reflection member 38 and at least one circulation conduit 40 surrounding the laser beam 34
- the focusing lens 36 makes it possible, among other things, to focus the laser beam 34 which is conveyed for example by optical fiber 51 from a laser source external to the welding machine 1 and here not visible, to the means intended to channel the laser beam 34.
- the laser beam 34 coming from the focusing lens 36 is surrounded by the circulation conduit 40 such that the latter protects both a user of the welding machine 1 from the laser beam 34 and both the laser beam 34 itself and the external environment can disrupt its trajectory.
- the circulation conduit 40 of the laser beam 34 extends from the focusing lens 36 to at least one welding zone 44 of the parts to be welded 2.
- welding zone 44 is meant a portion on the parts to weld 2 on which the weld bead 14 mentioned above must form.
- the circulation conduit 40 is bent so as to form an angular portion 46 of the circulation conduit 40.
- Such a structure of the circulation conduit 40 makes it possible in particular to optimize the dimensions of the processing machine.
- welding 1 by limiting the size of said circulation conduit 40 of the laser beam 34.
- the reflection member 38 is then arranged in the angular portion 46 of the circulation conduit 40.
- the reflection member 38 is arranged in the circulation conduit 40 between the focusing lens 36 and the welding zone 44.
- the function of the reflection member 38 is to deflect the rectilinear trajectory of the laser beam 34 at the outlet of the focusing lens 36.
- the angular portion 46 of the circulation conduit 40 forms an angle substantially right of the circulation conduit 40 and the reflection member 38 is arranged in the angular portion 46 of the circulation conduit 40 such that it deflects the laser beam 34 by 90° in order to follow the trajectory of the circulation conduit 40.
- the reflection member 38 is a mirror.
- the welding device 30 comprises at least one housing 48 delimiting a chamber 50 around the welding zone 44, the housing 48 being disposed at one end of the circulation conduit 40, opposite the focusing lens 36.
- the housing 48 includes an opening 52 configured to allow the parts to be welded 2 to pass through the housing 48.
- the housing can comprise a device for projecting a neutral gas towards the welding zone so as to avoid oxidation of the weld bead which results from welding by the laser beam.
- the neutral gas projection device is then at least partly positioned in chamber 50.
- FIG 3 illustrates an exemplary embodiment of the welding machine which comprises an optical fiber 51.
- This optical fiber 51 extends mainly along a direction which lies in the plane of one of the raised edges 4. Said otherwise, the laser beam arrives from above the area to be welded.
- the focusing lens 36 is thus vertically above the welding zone 44.
- the means 32 which is intended to channel the laser beam 34 comprises means for channeling the laser beam so as to strike perpendicularly the surface of the raised edge 4.
- the means 32 intended to channel the laser beam 34 comprises three reflection members 38a, 38b and 38c.
- the first reflection member 38a is immediately downstream of the focusing lens and it returns the laser beam 34 in an exit direction perpendicular to the entry direction which strikes the first reflection member 38a.
- the laser beam 34 then strikes a surface of a second reflection member 38b and the latter returns the laser beam 34 in an exit direction perpendicular to the entry direction which strikes the second reflection member 38b.
- the direction of this intermediate portion of the beam is then parallel, or substantially parallel, to the plane in which the raised edge 4 is inscribed.
- the third reflection member 38c brings back the laser beam 34 so that it strikes the raised edge 4. This third reflection member 38c returns the laser beam 34 in an exit direction perpendicular to the entry direction which strikes it in entrance.
- the housing 48 of the welding device 30 is dimensioned such that it is capable of housing at least one pair of pressure rollers 54 intended to press the parts to be welded 2 against each other at the level of the welding zone 44.
- the pressure rollers 54 of the at least one pair of pressure rollers 54 are arranged on either side of the welding zone 44 in such a way that they press the parts to be welded 2 against each other.
- the parts to be welded 2 are pressed against each other such that the welding zone 44 has a maximum clearance between sheets of 0.2mm spacing between said parts to be welded 2
- the pressure rollers 54 are connected to a system for pressurizing the pressure rollers 54 belonging to the welding machine, in order to press them against the parts to be welded 2 at the level of the welding zone 44.
- the laser beam 34 is inscribed in a plane in which the axis of rotation R of the at least two pressure rollers 54 passes, visible in Figure 4. Advantage is taken of such a characteristic in this allows the laser beam 34 to pass through the welding zone 44 where the parts to be welded 2 are in most contact with each other.
- the two pressure rollers 54 mentioned above are called first pair 54a of pressure rollers 54.
- the welding machine 1 comprises a second pair 54b of pressure rollers 54.
- the first pair 54a and the second pair 54b of pressure rollers 54 are on either side of the laser beam 34.
- the pressure rollers 54 of the second pair of pressure rollers 54b each have an axis of rotation R which fits into the common plane with the axes of rotation R of the other pressure rollers 54 of the first pair of pressure rollers 54, and optionally with the beam laser 34.
- the pressure rollers 54 of the second pair 54b of pressure rollers are arranged on the other side of the welding zone 44 relative to the first pair 54a of pressure rollers 54, in the vertical direction V of the welding machine 1. This makes it possible to optimize the plating of the parts to be welded 2 at the level of the welding zone 44.
- the welding device 30 comprises a receiving element 56 of the laser beam 34 arranged in the housing 48 and configured to be cooled, for example by means of a cooling circuit, not visible.
- the receiving element 56 is configured to absorb a residual part of the laser beam 34 following its passage through the parts to be welded 2.
- the parts to be welded are arranged between the focusing lens 36 and the receiving element 56 along the trajectory of the laser beam 34.
- the receiving element 56 is made of metallic material, for example copper, or of ceramic material. It is understood, however, that the receiving element 56 can be made of any material capable of being cooled.
- the welding machine 1 according to the invention makes it possible to weld different metals with the same welding machine 1.
- the welding machine 1 according to the invention makes it possible to weld parts to be welded 2 made of InvarTM or even of an alloy with a high manganese content.
- high manganese content we mean a content of at least 25% in an alloy.
- the power of the laser beam 34 is between 1250W and 6000W.
- the power of the laser beam 34 is between 1250W and 25000W.
- the drive wheels 26 will adapt their rotation speed in order to optimize the welding of the parts to be welded 2.
- the speed of advancement of the welding machine 1 is between 2m/min and 8m/min, advantageously 5.5m/min.
- the advancement speed of the welding machine 1 is between 2m/min and 4.8m/min.
- the welding machine may include a so-called “double-core” optical fiber 51.
- This optical fiber thus comprises an internal fiber which forms the core of the fiber and an external fiber which surrounds the core.
- This organization makes it possible to focus the laser beam 34 which circulates in the heart by means of the focusing lens 36 so as to deliver a power of the beam close to 6000W, the distance of the focusing lens 36 relative to the peripheral zone of the optical fiber 51 making it possible to deliver a laser beam 34 with a power of less than 6000W, which significantly limits the projection of droplets on the sides of the weld bead 14.
- This choice also makes it possible to do without any laser beam oscillation device because the width of the beam reaches specifications.
- the welding machine 1 is thus simpler and more compact.
- the welding machine may include a camera system such as a camera.
- a camera system such as a camera.
- This camera system can point directly at the welding zone 44, so as to observe the creation of the weld.
- this camera system can point towards the rear of the welding machine so as to observe the weld after the welding machine has passed.
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2209950A FR3140292B1 (fr) | 2022-09-30 | 2022-09-30 | Machine de soudage à faisceau laser |
| PCT/FR2023/051516 WO2024069115A1 (fr) | 2022-09-30 | 2023-09-30 | Machine de soudage à faisceau laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4594043A1 true EP4594043A1 (fr) | 2025-08-06 |
Family
ID=84569514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23798496.8A Pending EP4594043A1 (fr) | 2022-09-30 | 2023-09-30 | Machine de soudage à faisceau laser |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4594043A1 (fr) |
| KR (1) | KR20250075676A (fr) |
| CN (1) | CN119998074A (fr) |
| FR (1) | FR3140292B1 (fr) |
| WO (1) | WO2024069115A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3164931B1 (fr) * | 2024-07-24 | 2026-07-24 | Gaztransport Et Technigaz | Machine de soudage de bords relevés de tôles métalliques |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3818172A (en) * | 1970-11-17 | 1974-06-18 | Kockums Mekaniska Verkstads Ab | Welding apparatus for interconnecting flanges |
| US3777107A (en) * | 1971-03-12 | 1973-12-04 | Gaz Transport | Electrical welding machine |
| FR2402509A1 (fr) * | 1977-09-07 | 1979-04-06 | Dunkerque Normandie Ste Metall | Machine de soudage automatique de toles metalliques |
| JPH0775786B2 (ja) * | 1991-12-04 | 1995-08-16 | 川崎重工業株式会社 | 立体薄板構造体の溶接方法及びその装置 |
| CN1505553B (zh) * | 2001-04-27 | 2010-07-07 | 本田技研工业株式会社 | 激光束焊接方法和设备 |
| JP2004358529A (ja) * | 2003-06-05 | 2004-12-24 | Keylex Corp | レーザ溶接装置 |
| DE502005006727D1 (de) * | 2005-09-06 | 2009-04-09 | Trumpf Werkzeugmaschinen Gmbh | Vorrichtung zur aufnahme von plattenförmigen materialien für zumindest einen trennvorgang |
| KR100785223B1 (ko) * | 2007-02-14 | 2007-12-11 | Stx조선주식회사 | Lng 운반선 인바강 용접을 위한 인버터직류전원자동저항심용접장치 |
| US8362385B2 (en) * | 2009-08-07 | 2013-01-29 | Flexider S.R.L. | Apparatus and method for sealing collars of double-wall bellows and double-wall bellows so obtained that can be fitted with crack monitoring |
| CH702374A2 (de) * | 2009-12-09 | 2011-06-15 | Sunlaser Consulting Gmbh | Vorrichtung zur Herstellung von solarthermischen Finnen. |
-
2022
- 2022-09-30 FR FR2209950A patent/FR3140292B1/fr active Active
-
2023
- 2023-09-30 CN CN202380069841.5A patent/CN119998074A/zh active Pending
- 2023-09-30 EP EP23798496.8A patent/EP4594043A1/fr active Pending
- 2023-09-30 KR KR1020257013570A patent/KR20250075676A/ko active Pending
- 2023-09-30 WO PCT/FR2023/051516 patent/WO2024069115A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3140292B1 (fr) | 2024-10-25 |
| KR20250075676A (ko) | 2025-05-28 |
| FR3140292A1 (fr) | 2024-04-05 |
| WO2024069115A1 (fr) | 2024-04-04 |
| CN119998074A (zh) | 2025-05-13 |
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