EP3860801A1 - Procédé et dispositif de serrage permettant de produire une soudure au niveau d'un point de contact entre deux pièces au moyen d'un faisceau laser - Google Patents

Procédé et dispositif de serrage permettant de produire une soudure au niveau d'un point de contact entre deux pièces au moyen d'un faisceau laser

Info

Publication number
EP3860801A1
EP3860801A1 EP19790115.0A EP19790115A EP3860801A1 EP 3860801 A1 EP3860801 A1 EP 3860801A1 EP 19790115 A EP19790115 A EP 19790115A EP 3860801 A1 EP3860801 A1 EP 3860801A1
Authority
EP
European Patent Office
Prior art keywords
clamping
channel
joint
workpieces
clamping device
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
Application number
EP19790115.0A
Other languages
German (de)
English (en)
Inventor
Philipp Ziegler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Werkzeugmaschinen SE and Co KG
Original Assignee
Trumpf Werkzeugmaschinen SE and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Publication of EP3860801A1 publication Critical patent/EP3860801A1/fr
Pending legal-status Critical Current

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
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1462—Nozzles; Features related to nozzles
    • B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
    • B23K26/147—Features outside the nozzle for feeding the fluid stream towards 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
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B23K37/0435—Clamps

Definitions

  • the invention relates to a method for producing a weld seam at a joint between two workpieces with a laser beam, in which the workpieces to be welded to one another are positioned with a clamping device, and a first tool between a base block of the clamping device and a clamping surface of a first - The first clamping element of the clamping device and a second workpiece are held between the base block and a clamping surface of a second clamping element of the clamping device.
  • the invention further relates to a clamping device for producing a weld seam at a joint between two workpieces with a laser beam, in particular for carrying out the method.
  • a welding device and a method for producing a weld seam between two workpieces with a laser beam are known from US 2018/0236605 A1.
  • the two workpieces to be welded are fixed one above the other to form an overlap area in the clamping device.
  • a protective gas is supplied above the overlap area, which emerges from the openings in the clamping elements at a distance from the clamping surface.
  • a protective gas device for a laser processing device is known from DE 203 06 599 U1.
  • a workpiece is clamped in a workpiece holder.
  • One or more shielding gas nozzles are directed onto the machining area of the workpiece by the laser beam and are provided separately from clamping elements for fastening the workpiece.
  • a laser welding process is also known from JP H06-292 989 A.
  • an air flow crosses the laser beam to produce the weld seam in an overlap area of two workpieces.
  • a method and a device for laser welding is known from US 2008/0296271 A1.
  • This device comprises clamping elements with a U-shaped clamping surface. At a distance from the clamping surface of the clamping elements, holes are provided for supplying protective gas.
  • DE 10 2016 124 353 B3 discloses a laser welding method with a clamping device, by means of which two workpieces to be welded together are held during the laser welding process.
  • the clamping device comprises a clamping plate, on the underside of which a gas guide device is provided, through which gas can be supplied in individual areas to the workpieces to be welded.
  • a plasma generated during welding is to be removed in a targeted manner to ensure process stability.
  • Such a method has the disadvantage that the gas is not supplied or is not supplied sufficiently in individual areas. Oxidations can occur that are visually visible and impair the manufactured component. In addition, sufficient cooling cannot be achieved, which causes temper colors to form near the weld.
  • DE 10 2012 102 820 A1 discloses a clamping module for a clamping device for clamping sheet metal components, which are connected to a component by means of a welding process.
  • This clamping device enables individual sheet metal components to be aligned and positioned exactly with respect to one another. Thanks to the modular structure, a variety of welding tasks can be solved.
  • the invention has for its object to provide a method and a clamping device for producing a weld at a joint between two workpieces with a laser beam, whereby a high welding quality is achieved and visible oxidation in particular prevented.
  • a method for producing a weld seam in which, before the start of a laser welding process with the laser beam, a protective gas is supplied to one, several or each clamping element via at least one connection, which is directed through an outlet gap in the clamping element in the direction of the welding point output and after purging the joint of the two workpieces to be welded with the protective gas, the laser welding process is started.
  • the purging of the joint with protective gas is preferably maintained during the entire laser welding process.
  • the purging can also be operated with a run-on after the welding process has ended.
  • a shielding gas flow is emitted uniformly over a length of the weld seam to be formed, as a result of which the joint along the weld seam is sealed off from oxygen. This prevents oxygen from reaching the joint during the manufacture of the weld seam.
  • Adequate cooling can be achieved at the welding point to prevent the formation of temper colors.
  • the clamping elements are aligned adjacent to the joint of the workpieces to be connected and the outlet gap on the clamping element for the shielding gas is set back in relation to the joint.
  • a rinsing channel is formed between the outlet gap on the clamping element and the joint of the workpieces.
  • the flow can be further laminated by a further deflection between the outlet gap and the flushing channel.
  • the flushing channel is aligned with the joint, so that a protective gas jacket or protective gas curtain is formed over the entire length of the weld.
  • the rinsing channel which is formed between the clamping element and the workpiece, is of the same length or longer than the weld seam.
  • the length of the rinsing channel which extends at least over the entire length of the weld seam, also ensures that a protective gas envelope is formed at the beginning and at the end of the weld seam in order to avoid oxidation and to achieve cooling.
  • At least one outlet channel provided in the tensioning element, which opens into the outlet gap is preferably aligned at an angle of less than 90 °.
  • the flow direction of the outlet channel is preferably oriented at an angle of less than 90 ° to the clamping surface of the clamping element.
  • the protective gas flows in from the outlet channel in the direction of the impact parts, as a result of which a streamlined outlet of the protective gas can be achieved.
  • a deflection between the outlet direction of the outlet channel and the flushing channel for the shielding gas stream is preferably also set in order to ensure the formation of a laminar flow in the flushing channel, from which the shielding gas streams emerge to the impact parts.
  • the clamping elements are arranged and aligned with one another in the respective clamping position relative to the base block in such a way that they form a common flushing channel above the abutting parts.
  • the angle between this common rinsing channel and the rinsing channel formed between the clamping element and the workpiece is preferably greater than 90 °.
  • Each clamping element is positioned adjacent to the joint in a clamping position, which means that the respective rinsing channels are assigned to one another. The flows from the rinsing channels meet above the joint.
  • the common flushing channel formed above the joint enables improved shielding gas flushing around the top of the joint, since the shielding gas flows on the top are further collected and compressed by the common flushing channel, which enables an improved shielding gas jacket with respect to the joint.
  • a clamping device for producing a weld seam on a butt joint between two workpieces with a laser beam which comprises a basic block for the abutment of at least two workpieces and at least two clamping elements, each clamping element being adjacent to The joint of the workpieces is aligned and the workpiece is held clamped between the clamping element and the base block and with at least one connection provided on the clamping element for supplying one or more protective gases or a mixture of protective gases, each clamping element having one Has outlet gap for the output of the protective gas or the protective gas flow to the joint of the workpieces.
  • clamping elements allow a uniform flow over an entire length of the weld seam to be fed to the joint of the workpieces to be welded, so that the protective gas supplied essentially completely envelops the joint.
  • the exclusion of oxygen at the weld seam can prevent the formation of oxidation.
  • the exit gap is provided adjacent to the clamping surface.
  • the protective gas can be supplied directly and adjacent to the joint and a flushing channel can be formed with the clamped workpiece.
  • the outlet gap is preferably formed in the tensioning element for the protective gas over the entire length of the tensioning element.
  • the gap width of the exit gap is preferably constant over the length of the exit gap.
  • the outlet gap is advantageously laterally delimited by a wall section of the tensioning element.
  • a labyrinth of a plurality of channel sections arranged in a row is formed in each clamping element between the at least one connection for supplying the protective gas and the outlet gap.
  • a counter pressure is built up inside the labyrinth while the protective gas is being supplied.
  • a protective gas which is initially punctiform or supplied by a plurality of individual streams can also be smoothed in order to achieve a laminar flow at least shortly before the exit gap. At least a deflection of the protective gas flow by 90 ° and subsequently a deflection by 45 ° or less is preferably provided.
  • a further advantageous embodiment of the tensioning element provides that at least one bore in the tensioning element is connected to the connection for supplying the protective gas, said bore comprising a plurality of individual bores which open into the at least one channel section of the labyrinth or a distribution chamber.
  • the individual bores which are preferably provided uniformly distributed over the length of the distributor chamber, preferably open into the distributor chamber before this distributor chamber merges into the at least one channel section.
  • This distribution chamber has a larger cross section than the sum of the individual bores, so that swirls are generated in order to achieve a largely uniform filling of the distribution chamber with protective gas.
  • the distribution chamber and / or the at least one channel section preferably have a length which essentially corresponds to or is the same as the length of the outlet gap. This enables the protective gas to be divided within the clamping element immediately after the protective gas has been fed into the clamping element.
  • At least one first channel section adjoins the distributor chamber, which deflects the protective gas supplied in the distributor chamber.
  • the supplied flow of the protective gas is dammed up or swirling takes place in order to produce a laminar flow.
  • a diffuser is advantageously provided in the distribution chamber.
  • This diffuser can consist of a fabric-shaped material, a felt or the like. This diffuser promotes mixing of the individual flows of the protective gas, which pass through the individual bores into the distribution chamber.
  • At least one outlet channel the flow direction of which deviates from the flow direction of the first channel section, preferably adjoins the first channel section.
  • At least one further channel section is preferably provided between the first channel section and the outlet channel and is oriented differently from the respective preceding channel section in the flow direction. If the flow direction is deflected several times within the successive channel sections in the labyrinth, an increased uniformity of the flow velocities of the protective gas in the outlet gap can be achieved.
  • the tensioning element preferably has the exit gap adjacent to the tensioning surface.
  • the outlet channel opening into the outlet gap is preferably oriented at an angle of less than 90 ° to the clamping surface of the clamping element.
  • the angle between the outlet channel and the clamping surface is preferably less than 60 °. In particular, this is 45 °. As a result, a sufficiently high flow rate can also be achieved at the same time.
  • the clamping element is advantageously formed from a clamping block and a cooling block, the outlet gap being formed between the clamping block and the cooling block.
  • This enables simple production of an outlet gap which extends essentially over the entire length of the tensioning element and of at least one channel section and / or outlet channel leading to the outlet gap.
  • at least one duct wall section can be formed on the clamping block and the corresponding duct wall section on the cooling block. In this way, an internal labyrinth can be created, in which several deflections in the flow direction can be provided.
  • a first wall section is preferably provided on the cooling block, which is set back relative to the clamping surface on the clamping block and which adjoins the outlet gap, so that in a clamping position of the clamping element with the workpiece, a rinsing channel adjoining the outlet channel is formed is.
  • the rinsing channel extends over the length of the weld or beyond. In this way, a protective gas curtain can be fed to the joint for the oxidation-free formation of the weld seam.
  • a further advantageous embodiment of the clamping element provides on the cooling block a second wall section which adjoins the first wall section and which forms a common flushing channel in a clamping position with an opposing clamping element.
  • This common rinsing channel is located above the joint.
  • the basic block with the adjoining clamping elements is arranged below the butt parts.
  • the respective flushing channels between the base block and the first and second tensioning elements merge into the common flushing channel in the region of the abutting parts. This can further improve the protective gas envelope of the joint.
  • the cooling block is preferably detachably connected to the clamping block, in particular by a screw connection. This enables simple manufacture of the labyrinth and quick and simplified assembly. In addition, the cooling block can also be replaced in a simple manner after damage or possible wear.
  • a distance between the cooling block and the clamping block can advantageously be changed.
  • a width of a channel section and / or the width of the rinsing channel can thereby be adjustable. This enables the exiting shielding gas flow to be individually adapted to the workpieces to be welded and the welding parameters resulting therefrom.
  • the clamping block is preferably made of a light metal, in particular aluminum, and the cooling block is made of a highly thermally conductive material, in particular copper.
  • This combination also has the advantage of inexpensive manufacture of such tensioning elements.
  • a thermally conductive material for the cooling block made of copper is preferably provided, since copper is a highly reflective material and is less sensitive than other materials to laser radiation, in particular to NIR (near-infrared) laser radiation with a wavelength> 1 mm.
  • the working gap provided in the tensioning element is angled along its entire length.
  • the working gap can be angled, for example, by an angle of 90 °.
  • the clamping element can thus be designed as a so-called corner clamping element, in which a corner area can be welded to one another, for example from three mutually aligned workpieces.
  • FIG. 1 shows a perspective view of a tensioning device
  • FIG. 2 shows a schematic view from above of the tensioning device according to FIG. 1,
  • FIG. 3 shows a schematic sectional view of the tensioning device along the line II-II in FIG. 2,
  • FIG. 4 shows a schematically enlarged view of a clamping element in a clamping position with a workpiece for the base block of the clamping device
  • Figure 5 is a schematic view of a clamping block of the
  • FIG. 6 shows a schematic sectional view along the line VV in FIG. 5
  • FIG. 7 shows a perspective view of an alternative embodiment of the tensioning device to FIG. 1,
  • FIG. 8 shows a schematic sectional view of the tensioning device according to FIG. 7,
  • FIG. 9 shows a schematically enlarged view of the clamping device according to FIG. 7 in the region of the joint of two workpieces.
  • Figure 10 is a perspective view of an alternative embodiment of the clamping elements for welding workpieces to form a corner area.
  • FIG. 1 shows a perspective view of a clamping device 11 for producing a weld seam at a joint 14 between two workpieces 15.
  • FIG. 2 shows a schematic view from above of the tensioning device 11 according to FIG. 1.
  • This tensioning device 11 comprises a base block 17 and two tensioning elements 18, 20.
  • the tensioning device 11 can also consist of several base blocks and / or more tensioning elements consist.
  • a support surface 19 is provided on the base block 17 in order to receive the workpieces 15 to be welded.
  • a holding element 21 is preferably assigned to the bearing surface 19. This holding element 21 can be adjustable depending on the size of the workpieces 15 to be welded to the base block 17.
  • the workpieces 15 to be welded are preferably made of a plate-shaped material. In particular, sheets are provided. Depending on the angular arrangement of the workpieces to be welded 15, the receiving surfaces 19 are aligned with each other. In example II, the contact surfaces 19 on the base block 17 are aligned at an angle of 90 ° to one another.
  • clamping elements 18, 20 After placing the workpieces 15 on the base block 17, the clamping elements 18, 20 are positioned and aligned with the joint 14. Fixing elements 23 are provided for precisely fitting the clamping elements 18, 20.
  • the clamping elements 18, 20 and the base block 17 of the clamping device 11 are designed such that they are the same length or longer than the joint 14 of the workpieces 15 on which the weld seam is formed.
  • the clamping elements 18, 20 have the same design and are aligned symmetrically to the joint 14.
  • the clamping elements 18, 20 are arranged on the base block 17 in a clamping position 25.
  • the tensioning element 18, 20 has at least one connection 27 for supplying a protective gas. This protective gas is in the clamping element 18,
  • the 20 comprises a clamping block 28 and a cooling block 29.
  • the cooling block 29 and the clamping block 28 are preferably designed to be detachable from one another.
  • a screw connection 31 is provided.
  • FIG. 3 shows a schematic sectional view along the line II-II in FIG. 2.
  • the workpieces 15 are partially overlapping to one another in the region of the joint 14.
  • protective gas flows around or surrounds the joint 14.
  • a laser beam 33 is directed onto the joint 14.
  • a travel path along the joint 14 determines the length of the weld seam between the two workpieces 15.
  • the laser beam 33 is output via a processing head 34, in particular an optical system, and is focused with respect to the joint 14. This processing head 34 is part of a laser processing machine, not shown.
  • the machining head 34 can be guided both via a single or multi-axis linear system and also through a single or multi-axis system Robot handling device.
  • the orientation of the laser beam 33 with respect to its beam axis to the impact point 14 can be set in an application-specific manner.
  • FIG. 4 shows a schematically enlarged view of only one clamping element 18, 20 in the clamping position 25.
  • the first workpiece 15 is held clamped between the base block 17 and a clamping surface 36 of the clamping element 18, 20.
  • the second clamping element 18, 20 is not shown for simplicity.
  • the clamping surface 36 is preferably provided on the clamping block 28.
  • a labyrinth 38 is preferably formed from channel sections 41, 42, 43, 45, through which the protective gas is guided from the connection 27 to the outlet gap 51.
  • a bore 53 As shown in FIG. 3.
  • Several individual bores 54 branch off from this bore 53 and open into a distribution chamber 55.
  • This distribution chamber 55 is connected to a first channel section 41.
  • This preferably causes a 90 ° deflection of the protective gas flow.
  • a second channel section 42 which is oriented differently from the first channel section 41 in the flow direction.
  • a third channel section 43 is provided, which is preferably oriented differently in the flow direction from the preceding channel section 42.
  • the third channel section 43 merges into an outlet channel 45.
  • the outlet channel 45 opens into the outlet gap 51.
  • the channel sections 41, 42, 43 and the outlet channel 45 are each oriented differently from one another and are connected to one another by a flow-optimized deflection.
  • the protective gas flows into the distribution chamber 55 through the individual bores 54, which are preferably uniformly distributed over the length of the distribution chamber 55. This creates swirls and a first distribution of the protective gas in the distribution chamber 55 the protective gas flows into the first channel section 41.
  • the deflection creates a counterpressure, which smoothes the turbulence so that the turbulence is reduced.
  • a laminar flow of the protective gas is achieved by the at least one further deflection into the outlet channel 45 before it exits via the outlet gap 51.
  • a plurality of channel sections 41, 42, 43 are preferably provided in order to achieve a flow velocity along the labyrinth 38 that is as uniform as possible, so that the protective gas flow emerges essentially uniformly at the outlet gap 51.
  • a rinsing channel 57 is formed between the clamping element 18 and the workpiece 15 adjacent to the outlet channel 45. This ends at or near the joint 14 of the workpieces 15.
  • the cooling block 29 is preferably set back with a first wall section 58 relative to the clamping surface 36 in order to form the flushing channel 57.
  • the outlet channel 45 is oriented, for example, at an angle of 45 ° to the clamping surface 36. As a result, an additional deflection is provided between the outlet duct 45 and the flushing duct 57 in order to further uniformize the protective gas flow.
  • the position of the cooling block 29 and the clamping block 28 can preferably be changed in relation to one another in order to adjust the width of the rinsing gap 57 and / or the width of the channel sections 41, 42, 43 and / or the outlet channel 45.
  • FIG. 5 shows a schematic view of the clamping block 28 with a cooling block 29 removed.
  • FIG. 6 shows a sectional view along the line VV in FIG. 5.
  • FIG. 5 illustrates the width of the outlet gap 51 using an arrow 52.
  • the lateral ones Wall sections 61 delimit the outlet gap 51 and in particular the width of the labyrinth 38.
  • the two-part arrangement of the tensioning element 18 makes it easy to produce a multiple deflection of the channel sections 41, 42, 43 and / or the outlet channel 45.
  • a diffuser can be used in the distribution chamber 55. This diffuser can consist of a fabric, a felt or some other mesh-like fabric or the like in order to dissolve the individual flows entering the individual bores 54 and to distribute them evenly.
  • the workpieces 15 are first held clamped by the clamping device 11. Subsequently, protective gas is supplied to the connections 27 of the tensioning elements 18, 20 via a delivery device (not shown in more detail). This protective gas is distributed within the clamping element 18 over the entire length of the distributor chamber 55 or the first channel section 41 and reaches the outlet gap 51. Through the distributor chamber 55 and / or the at least one channel section 41, 42, 43 and / or the Exit channel 45 creates a laminar flow. This laminar flow reaches the flushing channel 57 via the outlet gap 51. The protective gas emerges from the flushing channel 57 near the joint 14, as a result of which the joint 14 is surrounded by the protective gas.
  • FIG. 7 shows an alternative embodiment of the tensioning device 11 according to FIG. 1.
  • FIG. 8 shows a schematic sectional view of the alternative tensioning device 11 according to FIG. 7.
  • FIG. 9 shows an enlarged, sectional view of the clamping device 11 in the region of the joint 14 of the workpieces 15.
  • This tensioning device 11 has an additional common flushing channel 66, which is shown enlarged in FIG. 9.
  • the tensioning elements 18, 20 have a further wall section 61 adjacent to the first wall section 58, which extends opposite the base block 17 above the joint 14.
  • the common flushing channel 66 can be formed above the joint 14, as shown in FIG.
  • the wall sections 61 can be aligned parallel to one another, as a result of which a common flushing channel 66 is created with the same width over its height.
  • the wall sections 61 can also be aligned at an angle to one another, so that they widen or narrow in relation to the joint 14.
  • the protective gas flows out of the exit gap 51 and from each side along the workpiece 15 to the joint 14.
  • the protective gas then continues to be collected in the common flushing channel 66.
  • the covering of the joint 14 with protective gas is improved.
  • a kind of chimney effect is achieved through this common flushing channel 66. This enables improved cooling on the one hand and improved shielding against oxygen at the joint 14 on the other hand.
  • tensioning elements 18, 20, which have the further wall section 61 which have the further wall section 61, a single or double deflection of the protective gas within the tensioning element 18, 20 can be sufficient to generate a laminar flow.
  • the labyrinth 38 can be simplified.
  • the clamping element 18, 20 comprises a distributor chamber 55, to which a first channel section 41 and an outlet channel 45 are connected.
  • the further channel sections 42, 43 according to the previously described embodiment of the tensioning elements 18, 20 can - but need not - be provided. Otherwise, reference can be made in full to the above-described embodiment.
  • FIG. 10 shows a further alternative embodiment of the tensioning device 11 to FIG. 1.
  • This tensioning device 11 comprises, for example, three tensioning elements 18, 20, 22.
  • the structure of the tensioning elements 18, 20, 22 in FIG. 10 corresponds to that of the tensioning elements 18, 20 in FIG. 1. Deviating from these tensioning elements 18, 20, 22 are corner elements. ment trained.
  • the outlet gap 51 extends over a corner region of 90 °.
  • the protective gas flows through the outlet channel 45 both in a first direction and in a second direction offset by 90 ° to the joint 14 'and 14 "or 14" and 14' "or 14 'and 14'” out.
  • the laser beam 33 is first moved from a start position 71 to the corner areas, then from a start position 72 and then from a start position 73 to the corner.
  • the present method for producing a weld seam at a butt joint 14 between two or more workpieces 15 is particularly suitable for the production of objects made of steel or stainless steel for the food industry, which have special requirements regarding the degree of freedom, purity and / or high quality of

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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

La présente invention concerne un procédé permettant de produire une soudure au niveau d'un point de contact (14) entre deux pièces (15), selon lequel les pièces (15) à souder sont positionnées l'une par rapport à l'autre par un dispositif de serrage (11) qui comprend plusieurs éléments de serrage (18, 20, 22) et un bloc de base (17), la première pièce (15) est maintenue entre le bloc de base (17) et une surface de serrage (36) du premier élément de serrage (18) et une seconde pièce (15) est maintenue entre le bloc de base (17) et une surface de serrage (36) du second élément de serrage (20), et un gaz de protection est délivré au point de contact (14). Les éléments de serrage (18, 20, 22) sont adjacents au point de contact (14) des pièces (15) à souder et la fente de sortie (51) de l'élément de serrage (18, 20) concerné est décalée pour le gaz de protection par rapport au point de contact (14) des pièces (15), et un canal de rinçage (57) est formé entre la fente de sortie (51) et le point de contact (14). L'invention concerne en outre un dispositif de serrage permettant de produire une soudure au niveau d'un point de contact entre deux pièces au moyen d'un laser.
EP19790115.0A 2018-10-02 2019-10-02 Procédé et dispositif de serrage permettant de produire une soudure au niveau d'un point de contact entre deux pièces au moyen d'un faisceau laser Pending EP3860801A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018124313.8A DE102018124313A1 (de) 2018-10-02 2018-10-02 Verfahren und Spannvorrichtung zur Herstellung einer Schweißnaht an einer Stoßstelle zwischen zwei Werkstücken mit einem Laserstrahl
PCT/EP2019/076715 WO2020070195A1 (fr) 2018-10-02 2019-10-02 Procédé et dispositif de serrage permettant de produire une soudure au niveau d'un point de contact entre deux pièces au moyen d'un faisceau laser

Publications (1)

Publication Number Publication Date
EP3860801A1 true EP3860801A1 (fr) 2021-08-11

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EP19790115.0A Pending EP3860801A1 (fr) 2018-10-02 2019-10-02 Procédé et dispositif de serrage permettant de produire une soudure au niveau d'un point de contact entre deux pièces au moyen d'un faisceau laser

Country Status (3)

Country Link
EP (1) EP3860801A1 (fr)
DE (1) DE102018124313A1 (fr)
WO (1) WO2020070195A1 (fr)

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US20220055148A1 (en) * 2020-08-19 2022-02-24 Transportation Ip Holdings, Llc Welding window device

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