WO2015018551A1 - Procédé de production d'un cordon de soudure et élément de construction - Google Patents

Procédé de production d'un cordon de soudure et élément de construction Download PDF

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Publication number
WO2015018551A1
WO2015018551A1 PCT/EP2014/062675 EP2014062675W WO2015018551A1 WO 2015018551 A1 WO2015018551 A1 WO 2015018551A1 EP 2014062675 W EP2014062675 W EP 2014062675W WO 2015018551 A1 WO2015018551 A1 WO 2015018551A1
Authority
WO
WIPO (PCT)
Prior art keywords
molten bath
laser beam
weld
workpiece
weld seam
Prior art date
Application number
PCT/EP2014/062675
Other languages
German (de)
English (en)
Inventor
Jens Theis
Mario Matic
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2015018551A1 publication Critical patent/WO2015018551A1/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
    • 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
    • B23K26/0604—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams
    • B23K26/0608—Shaping the laser beam, e.g. by masks or multi-focusing by a combination of beams in the same heat affected zone [HAZ]
    • 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

Definitions

  • the invention relates to a component which has been produced by means of the method according to the invention.
  • a method according to the preamble of claim 1 is already known from practice. It is carried out by means of a laser beam device, the one
  • Laser beam for welding for example, generated by two components, wherein the two components made of metallic material, in particular the same material exist.
  • the material of at least one component is melted over a partial region of its depth or thickness.
  • the molten bath thus produced has a rounded melting base on the side facing away from the laser beam to the non-liquefied material.
  • Impair component safety In practice, these hot cracks extend approximately from the middle of the weld seam and reach close to the melting point, but do not reach it.
  • Characteristics of claim 1 characterized in that by temporally successively running over the same area of the at least one workpiece by the laser beam in each case a molten bath in the last generated, already solidified weld is generated, the depth of the molten bath compared to the last molten pool of the already solidified
  • weld is reduced, and wherein the depth of the molten bath is selected such that the molten bath extends into a range of below the respective molten bath, already solidified weld in which no solidification line is formed.
  • the invention makes use of the observation that hot cracks usually do not reach the melting point. This behavior can be explained by the fact that in the area of the melt base, which is usually curved or rounded in cross-section, during the solidification of the molten material, the solidification of the individual metal crystals of the
  • Wall of the molten bath is carried out in a direction perpendicular to the wall.
  • the material solidifies, at least approximately, last in a point which lies approximately in the region of the midpoint of a radius in the cross section of the melt pool in the melt base.
  • Laser beam is reduced and / or a feed rate of the
  • Laser beam is increased and / or an exposure time of the laser beam is reduced.
  • the measures mentioned, both individually and in combination, ensure that the introduced power is reduced to the melting zone, so that a melting zone reduced in depth can be generated.
  • the method comprises a molten bath in which the
  • Melting base of the respective molten bath has a rounding or curvature with a radius, wherein the depth of a melt bath subsequently produced corresponds to the depth of the molten bath previously generated, reduced by a maximum of the radius.
  • the laser beam of the laser beam device to the at least one
  • Aligned workpiece is that every time you drive over to create a new melt pool, an offset of the laser beam to the last generated
  • Melting bath takes place. This makes it possible to equalize or compensate for a last generated distortion in the at least one workpiece by generating a "counter-delay" in a renewed driving over the at least one workpiece.
  • the offset be designed as a lateral offset in relation to the respective last weld center.
  • the contour of the weld is formed closed, and that the offset is an offset along the contour of the
  • the process according to the invention preferably takes place in a dendritic
  • the dendritic solidification behavior can be influenced or produced by a corresponding temperature gradient and the solidification rate.
  • the invention also includes a component which is according to an inventive
  • This is in particular a component made of metal, in a particularly preferred embodiment or use of a component which is at least approximately in the region of the weld
  • housings in automotive applications such as housings of injectors or the like, is.
  • FIG. 1 in a simplified representation of a device for generating a
  • Fig. 5 respectively the region of the weld in the components of FIG. 1 in a longitudinal section
  • Fig. 1 is an arrangement for producing a weld 10 in
  • Workpieces 1, 2 shown.
  • the workpieces 1, 2 are shown in the
  • Embodiment rotationally symmetrical and have in the region of the weld 10 on the same diameter.
  • the two workpieces 1, 2 abut each other at a respective front end, forming a weld seam plane 1 1.
  • Part of the depth or thickness of the workpieces 1, 2 is formed, is generated by means of a laser beam device 100, preferably one
  • FIG. 2 it can be seen that after activation of the laser beam device 100 by means of the laser beam 101, a first molten bath 15a has been produced, which in cross-section has an approximately rounded or grounded melting base 16. At the melting base 16, a closes in the
  • Meltdown 16 opposite side in a flared area 18 passes.
  • the laser beam device 100 is switched off so that the material of the molten bath 15a solidifies.
  • the solidification of the material of the molten bath 15 a is carried out by the
  • Melting bath 15a aligned.
  • the material of the molten bath 15a finally solidifies in a common solidification point 21 in the area of the melt base 16.
  • the material solidified in the regions 17, 18 forms a multiplicity of solidification points, which form in the form of a continuous solidification line 22.
  • This solidification line 22 represents a potential starting point for hot cracks.
  • the laser beam 101 is again introduced into the same region of the last or first generated molten bath 15a, as shown in FIG. It is essential that by a variation of the parameters of the laser beam device 100 generated during the second crossing of the molten bath 15a and the weld 10a
  • Melting bath 15b has a depth t 2 , which is less than the melt bath depth ti.
  • the glass bath is t 2 slightly larger than the glass bath t- ⁇ , reduced by the radius r.
  • Freezing point 21 a and a solidification line 22a Freezing point 21 a and a solidification line 22a.
  • the method described so far for the production of a weld 10 can be modified or modified in many ways, without departing from the spirit of the invention.
  • the respective weld seam 10b to 10d is arranged by a lateral offset in relation to the last produced weld seam 10a to 10c.
  • the offset takes place either by an offset perpendicular to the plane of the welding plane 1 1 instead and / or in that takes place according to the illustration of FIG. 1, an offset in the circumferential direction of the respective weld 10b to 10d.
  • Embodiment formed number of four weld pools 15a to 15d is therefore only exemplary.

Landscapes

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

Abstract

L'invention concerne un procédé de production d'un cordon de soudure (10) dans lequel un faisceau laser (101), généré à l'aide d'un dispositif à faisceau laser (100), chauffe à une température de fusion la matière d'au moins une pièce (1, 2) sur une partie de l'au moins une pièce (1, 2) à l'intérieur d'un bain de fusion (15) jusqu'à un fond de fusion (16). Après l'opération avec le faisceau laser (101), la matière en fusion se solidifie, dans une phase de refroidissement suivante, de la zone en bordure du bain de fusion (20) à la pièce (1, 2) en direction du milieu (20) du bain de fusion.
PCT/EP2014/062675 2013-08-06 2014-06-17 Procédé de production d'un cordon de soudure et élément de construction WO2015018551A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013215421.6 2013-08-06
DE102013215421.6A DE102013215421A1 (de) 2013-08-06 2013-08-06 Verfahren zur Erzeugung einer Schweißnaht und Bauteil

Publications (1)

Publication Number Publication Date
WO2015018551A1 true WO2015018551A1 (fr) 2015-02-12

Family

ID=51033147

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/062675 WO2015018551A1 (fr) 2013-08-06 2014-06-17 Procédé de production d'un cordon de soudure et élément de construction

Country Status (2)

Country Link
DE (1) DE102013215421A1 (fr)
WO (1) WO2015018551A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240123549A1 (en) * 2021-02-23 2024-04-18 Kirchhoff Automotive Deutschland Gmbh Method For Laser Welding, And Welded Construction Produced Thereby

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08104949A (ja) * 1994-10-05 1996-04-23 Hitachi Ltd 表面処理層を有する構造物および表面処理層の形成方法
US20050028897A1 (en) * 2001-10-09 2005-02-10 Wilfried Kurz Process for avoiding cracking in welding
EP1647350A2 (fr) * 2004-10-18 2006-04-19 Babcock Borsig Service GmbH Installation et procédé de soudage laser ainsi que soudure laser
US20110073636A1 (en) * 2008-05-29 2011-03-31 Nikolai Arjakine Method and device for welding workpieces made of high-temperature resistant super Alloys

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08104949A (ja) * 1994-10-05 1996-04-23 Hitachi Ltd 表面処理層を有する構造物および表面処理層の形成方法
US20050028897A1 (en) * 2001-10-09 2005-02-10 Wilfried Kurz Process for avoiding cracking in welding
EP1647350A2 (fr) * 2004-10-18 2006-04-19 Babcock Borsig Service GmbH Installation et procédé de soudage laser ainsi que soudure laser
US20110073636A1 (en) * 2008-05-29 2011-03-31 Nikolai Arjakine Method and device for welding workpieces made of high-temperature resistant super Alloys

Also Published As

Publication number Publication date
DE102013215421A1 (de) 2015-03-05

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