WO1990011161A1 - Agencement de soudage de pieces a usiner plaquees au moyen d'un rayon laser - Google Patents

Agencement de soudage de pieces a usiner plaquees au moyen d'un rayon laser Download PDF

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Publication number
WO1990011161A1
WO1990011161A1 PCT/DE1990/000239 DE9000239W WO9011161A1 WO 1990011161 A1 WO1990011161 A1 WO 1990011161A1 DE 9000239 W DE9000239 W DE 9000239W WO 9011161 A1 WO9011161 A1 WO 9011161A1
Authority
WO
WIPO (PCT)
Prior art keywords
knurling
arrangement
welding
weld seam
workpieces
Prior art date
Application number
PCT/DE1990/000239
Other languages
German (de)
English (en)
Inventor
Klaus Behler
Ralf Imhoff
Eckhard Beyer
Werner Gatzweiler
Dora Maischner
Gerd Herziger
Original Assignee
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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
Priority claimed from DE3909471A external-priority patent/DE3909471C2/de
Application filed by Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. filed Critical Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Publication of WO1990011161A1 publication Critical patent/WO1990011161A1/fr

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
    • B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
    • 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
    • B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a 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
    • B23K26/32—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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
    • 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
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26

Definitions

  • the invention relates to an arrangement for welding coated workpieces, in particular galvanized sheets, in an overlap joint by means of laser radiation, with a shape in the area of the weld seam that creates space between adjacent workpiece surfaces, according to a patent (patent application
  • Such an arrangement is the subject of the main invention.
  • This arrangement relates to two sheets lying flat against one another, one of which has welds parallel to the weld seam, which protrude toward the other sheet.
  • there is a spacing gap between the sheets in the area between the formations with the aid of which it can be avoided that the evaporation of the coating material between the sheets to be joined increases .
  • Pore, hole and crater formation in the weld leads.
  • the formations on both sides of the joint or the weld seam have a special effect well-defined contact of the two workpieces with one another and therefore a correspondingly constant design of the weld, which can be produced with little control effort.
  • the object of the invention is to design the arrangement in such a way that the production outlay for the shape creating the distance between the adjacent workpiece surfaces is small and at the same time the formation of the undesired melt movements is avoided.
  • This object is achieved in that knurling is present as a shape.
  • Knurling is a shape that can be formed using known methods regardless of the thickness of the workpieces or the sheets and their shape in the joining area. This eliminates the above-described protruding formations and nevertheless the well-defined abutment of the workpieces or sheets against one another is retained. This results in a particularly good consistency of the shape, because this is not dependent on the tolerances of the workpieces, but is only influenced by parameters of the knurling, such as the design of the knurling element, the knurling pressure, etc.
  • the distance between adjacent workpiece surfaces does not run continuously along, as in the forms of the main application located on both sides of the weld seam, but is interrupted in the longitudinal direction by areas in which the workpieces are also close to one another in the area of the weld seam .
  • a periodic disturbance "of the workpiece surface with low amplitude is that affects the forming resonant melt movements. It were ⁇ the thus process-related periodic resonance phenomena in molten bath avoided, whereby the" humping avoided "effect or voninde.st affected can As a result, higher process speeds are possible.
  • the knurled width is approximately twice as large as the width of the weld seam. Given a corresponding usual knurling depth, this results in sufficient distance or space so that coating material which evaporates between the workpieces does not lead to pore, hole or crater formation in the weld seam.
  • the knurling can be produced by means of conventionally known methods. It is expedient if the knurling is produced by means of machining, cold pressing or cold rolling or embossing.
  • the knurling is designed as transverse and / or oblique and / or cross knurling. With the help of the aforementioned knurling forms, sufficient influence can be exerted that process-related periodic resonance phenomena in the melt bath are avoided.
  • Fig.l is a block diagram of a device for welding an arrangement according to the invention
  • Fig.2 shows a cross section of two special workpieces in
  • FIG. 3 is a plan view of a workpiece from FIG. 2.
  • a workpiece assembly 1 which consists of two workpieces 2, 3, which are joined with the aid of a laser 4.
  • the laser beam 5 generated by the laser 4 is focused by laser optics 6 and directed onto the joint 20.
  • the latter receives an additional material 8, namely through a guide element 9, which is designed, for example, as a tube and mechanically feeds the additional material in the form of a welding wire to the desired welding point.
  • the promotion of the filler material is carried with a conveyor 10 and the feed rate is measured with a measuring device 11 and mit_einem controller "12 signa ⁇ lengine. This controls the conveying speed of the forme ⁇ material by influencing the conveying device 10 correspondingly further operating parameters.
  • the meter is supplied by the beam diagnostics 13, which determines the quality of the laser beam 5, in particular its intensity, and accordingly acts on the controller 12.
  • the drive parameter is the speed of the workpieces 2, 3 relative to the laser beam 5, which is detected by the measuring and control device 14 and is influenced by the controller 12.
  • the measuring devices 15, 16 and 17 record operating parameters that result from the monitoring of the joint 7, namely acoustically (measuring device 15), optically (measuring device 16), whereby for example temperature monitoring of the joint 20 takes place or spectroscopic plasma monitoring. and also optically (measuring device 17), a cutting line method being used, for example, to determine the seam or gap geometry, in particular the gap width or a seam incidence in the area of the weld.
  • the controller 12 which is accordingly acted upon automatically ensures that the laser 4 or the laser optics 6 are acted on, so that the welding takes place in a completely process-controlled manner.
  • the welding takes place primarily as controlled welding of thin workpieces, in particular thin sheets, as are used in the body construction of motor vehicles. During this welding, it may be necessary to ensure that the weld seam is not visible on the outside or underside of the body panel. Nevertheless, the connection must be reliable and it should be welded at the highest possible speed in order to achieve high production.
  • the intensity of the laser radiation is regulated by the controller 12 as a function of one or more welding point parameters, at least one of which states whether the laser radiation generates laser-induced plasma in the welding point.
  • the presence of plasma or its formation is determined optically, for example, since in this case the material of the workpieces evaporates, which can be monitored by spectral analysis.
  • the controller 12 is acted upon accordingly and changes the laser intensity at the given time.
  • the implementation of several welding processes, which can also be used here, is described and explained in detail in the main invention, to which reference is hereby made to avoid repetitions. This applies to all the methods and devices mentioned there, insofar as they can be carried out in connection with knurling as a shape.
  • the knurling of the workpieces 2, 3 is described in more detail in FIGS.
  • the two workpieces 2, 3 are sheets with the comparatively small thickness s. They lie close together without a gap. Their configuration on the right and left of the welding point 20 or the welding seam 50 is irrelevant here.
  • the welding is carried out with a laser beam 5, which generates the weld seam 50 with the weld seam width b.
  • a laser beam 5 which generates the weld seam 50 with the weld seam width b.
  • it is moved, for example, oscillating transversely to the relative feed direction of workpieces 2, 3, so that the weakly V-shaped weld seam 50 shown is formed, with which workpieces 2, 3 are connected over their entire thickness 2s.
  • a knurling 46 which consists of a plurality of beads 51.
  • This bead 51 is present in the lower workpiece 3, but can also be present in the upper workpiece 2 as a bead 51 ', as indicated by dashed lines.
  • Each bead 51 has a length which corresponds to the knurling width br and has a depth which is equal to the knurling depth tr. It can be seen from the drawing that the knurled width br is approximately twice as large as the Seh diligentnahtbreit ⁇ b.
  • the bead 51 or the knurling 46 creates a distance a between adjacent workpiece surfaces, specifically between the workpiece surface 45 of the workpiece 3 forming the bead bottom and the workpiece surface 44 of the workpiece 2.
  • the bead 51 shown in broken lines is opposite the bead 51 51 is', the distance between the surfaces and Werkbericht ⁇ is enlarged so that the lumen also Vo ⁇ located between the two, namely doubled.
  • the knurling 46 consists of a plurality of beads 51 arranged in the welding direction 52, which have areas 52 between them in which the workpieces 2, 3 are arranged closely spaced apart.
  • the knurling is consequently a periodic disturbance, relative to the welding point 20, of not too great an amplitude in order to avoid process-related periodic resonance phenomena in the melt bath.
  • the knurl 46 the respective Anfor ⁇ changes accordingly ' "formed, ie, for example, as Querrändelung 47, as Schrägrändelung 48 or as Wienritze- lung 49. Combinations of these Rändelungsart are usable depending on the welding method.
  • the invention is used for welding two sheets lying flat on top of one another with laser radiation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Laser Beam Processing (AREA)

Abstract

Dans un agencement de soudage par recouvrement au moyen d'un rayon laser de pièces à usiner plaquées, notamment de tôles galvanisées, au moins une pièce à usiner est façonnée dans la région du cordon de soudure de façon à créer un écartement entre des faces adjacentes des pièces à usiner. Afin de réduire les coûts du façonnage requis pour créer l'écartement entre les faces adjacentes des pièces à usiner, tout en évitant des mouvements indésirables de la fonte, la pièce à usiner façonnée est moletée dans la région du cordon de soudure.
PCT/DE1990/000239 1989-03-22 1990-03-22 Agencement de soudage de pieces a usiner plaquees au moyen d'un rayon laser WO1990011161A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3909471A DE3909471C2 (de) 1988-06-21 1989-03-22 Überlappstoß zum Schweißen von beschichteten Werkstücken mittels Laserstrahlung
DEP3909471.5 1989-03-22

Publications (1)

Publication Number Publication Date
WO1990011161A1 true WO1990011161A1 (fr) 1990-10-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1990/000239 WO1990011161A1 (fr) 1989-03-22 1990-03-22 Agencement de soudage de pieces a usiner plaquees au moyen d'un rayon laser

Country Status (1)

Country Link
WO (1) WO1990011161A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995023670A1 (fr) * 1994-03-04 1995-09-08 Thyssen Laser-Technik Gmbh Procede de preparation des zones de jointure de pieces revetues pour soudage au laser et assemblage a recouvrement pour soudage de pieces revetues
US5454480A (en) * 1993-10-21 1995-10-03 Morris Holmes & Co. Flangeless fuel tank
FR2731373A1 (fr) * 1995-03-09 1996-09-13 Peugeot Procede de soudage de toles par un faisceau laser et assemblage de toles soudees obtenu par ce procede
WO2005014215A3 (fr) * 2003-08-12 2005-05-12 Magna Int Inc Methode de soudage au laser d'elements enrobes
WO2011042292A1 (fr) * 2009-10-06 2011-04-14 Scansonic Mi Gmbh Dispositif d'assemblage pour un assemblage par adhésion de matière au moyen d'une matière supplémentaire avec l'utilisation d'enregistreurs de mesure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1186960B (de) * 1956-10-06 1965-02-11 Gruss Blechwaren Verfahren und Vorrichtung zum Verschweissen von duennen Weissblechen
JPS6127189A (ja) * 1984-07-17 1986-02-06 Mitsubishi Electric Corp レ−ザ溶接方法
FR2600923A1 (fr) * 1986-07-02 1988-01-08 Steelweld France Procede de soudage en recouvrement d'aciers revetus au moyen d'un faisceau d'energie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1186960B (de) * 1956-10-06 1965-02-11 Gruss Blechwaren Verfahren und Vorrichtung zum Verschweissen von duennen Weissblechen
JPS6127189A (ja) * 1984-07-17 1986-02-06 Mitsubishi Electric Corp レ−ザ溶接方法
FR2600923A1 (fr) * 1986-07-02 1988-01-08 Steelweld France Procede de soudage en recouvrement d'aciers revetus au moyen d'un faisceau d'energie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 176 (M-491)(2232) 20 Juni 1986, & JP-A-61 27189 (MITSUBISHI ELECTRIC) 06 Februar 1986, siehe das ganze Dokument *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454480A (en) * 1993-10-21 1995-10-03 Morris Holmes & Co. Flangeless fuel tank
US5626776A (en) * 1993-10-21 1997-05-06 Morris Holmes & Co. Flangeless fuel tank
WO1995023670A1 (fr) * 1994-03-04 1995-09-08 Thyssen Laser-Technik Gmbh Procede de preparation des zones de jointure de pieces revetues pour soudage au laser et assemblage a recouvrement pour soudage de pieces revetues
FR2731373A1 (fr) * 1995-03-09 1996-09-13 Peugeot Procede de soudage de toles par un faisceau laser et assemblage de toles soudees obtenu par ce procede
WO2005014215A3 (fr) * 2003-08-12 2005-05-12 Magna Int Inc Methode de soudage au laser d'elements enrobes
WO2011042292A1 (fr) * 2009-10-06 2011-04-14 Scansonic Mi Gmbh Dispositif d'assemblage pour un assemblage par adhésion de matière au moyen d'une matière supplémentaire avec l'utilisation d'enregistreurs de mesure
CN102648070A (zh) * 2009-10-06 2012-08-22 扫描音速Mi有限责任公司 使用传感器并借助填充材料用于材料接合式连接的接合设备

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