CN116981536A - Method and device for joining two components - Google Patents

Method and device for joining two components Download PDF

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Publication number
CN116981536A
CN116981536A CN202280018349.0A CN202280018349A CN116981536A CN 116981536 A CN116981536 A CN 116981536A CN 202280018349 A CN202280018349 A CN 202280018349A CN 116981536 A CN116981536 A CN 116981536A
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China
Prior art keywords
region
leg
component
connection
terminating
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CN202280018349.0A
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Chinese (zh)
Inventor
C·班特尔
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of CN116981536A publication Critical patent/CN116981536A/en
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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
    • B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
    • B23K26/0626—Energy control of the laser beam
    • 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
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0853—Devices involving movement of the workpiece in at least in two axial directions, e.g. in a plane
    • 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
    • B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
    • 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
    • B23K26/28—Seam welding of curved planar seams
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0221—Laser 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors
    • 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
    • B23K2103/12—Copper or alloys thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
    • H01L2224/39—Structure, shape, material or disposition of the strap connectors after the connecting process
    • H01L2224/40—Structure, shape, material or disposition of the strap connectors after the connecting process of an individual strap connector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention relates to a method for joining two components, wherein the method (100) comprises the following steps: -arranging (101) the first member (501) on the at least one second member (503, 527) with a geometry extending from a first leg (505) of the first member (501) to the other leg (507) of the first member (501) via a bend (509) of the first member (501) arranged between the first leg (505) and the other leg (507); -welding (103) the first leg (505) with the at least one second member (503, 527) by moving the laser beam along a first welding trajectory, the first welding trajectory determining a first weld seam (511) extending from a starting region (517) to a terminating region (515) via a connection (519) arranged between the starting region (517) and the terminating region (515), wherein the starting region (517) and the terminating region (515) extend farther towards a side facing away from the bend (509) than the connection (519); -welding (105) a further leg (507) with at least one second component (503, 527) by moving the laser beam along a further welding trajectory, which further welding trajectory determines a further weld seam (513) extending from a starting region (521) to a terminating region (523) via a connection (525) arranged between the starting region (521) and the terminating region (523), wherein the starting region (521) and the terminating region (523) extend farther towards a side facing away from the bend (509) than the connection (525); wherein a green laser beam is used.

Description

Method and device for joining two components
Technical Field
The invention relates to a method and a device for joining two components and a component connection.
Background
Laser bonding devices, and in particular laser bonding equipment, are generally based on sources of infrared radiation that pose limitations in several respects that pose difficulties for the application of laser bonding techniques. Especially when using infrared radiation sources, process instability often results, which can lead to fluctuations in the welding depth and process interruptions, which can lead to a reduction in the joint area.
Disclosure of Invention
Within the scope of the invention, a method for joining, a joining device and a component connection are proposed. Further features and details of the invention are found in the respective dependent claims, the description and the figures. The features and details described in relation to the method according to the invention are of course also applicable here in relation to the joining device according to the invention and the component connection according to the invention, and vice versa, respectively, so that the disclosure in relation to the various aspects of the invention is always referred to each other.
The invention is used for connecting two components into a component connecting piece. The invention is particularly useful for making copper-to-copper connections of electrical connections for powering semiconductor components on circuit boards.
Thus, according to a first aspect of the present invention a method for joining two components is presented. The method comprises an arrangement step for arranging the first member on the at least one second member in a geometry extending from a first leg of the first member to the other leg of the first member via a bend of the first member arranged between the first leg and the other leg. Furthermore, the method comprises a first welding step for welding the first leg with the at least one second component by moving the laser beam along a first welding trajectory, which determines a first weld seam, which extends from a starting region to a terminating region via a connection arranged between the starting region and the terminating region, wherein the starting region and the terminating region extend farther towards a side facing away from the bend than the connection. Furthermore, the method comprises a further welding step for welding a further leg with the at least one second component by moving the laser beam along a further welding trajectory, which determines a further weld seam, which extends from the starting region to the ending region via a connection arranged between the starting region and the ending region, wherein the starting region and the ending region extend farther than the connection towards a side facing away from the bend. Provision is made for a green laser beam to be used in the method.
In the context of the present invention, "connection" is understood to mean a region of the welding geometry which is produced in particular during the deep-melt welding process and which connects the respective components to one another. The connection extends here in particular through the first component into the second component. It can also be provided that the connection is produced only during the deep-melt welding process or the thermal conduction welding process. In particular, it can be provided that the connection is produced during the mixing process of the deep-melt welding and the heat-transfer welding, because of the gradual transition between the starting region, the connection and the end region.
By the method according to the invention, the problems known in respect of infrared lasers can be avoided by using green lasers, since green lasers in particular exhibit a higher absorption on copper than infrared lasers and a larger focus than infrared lasers can be achieved. The green laser provided according to the invention thus converts more energy from its laser beam into the component connection than the infrared laser, so that the welding process is significantly more robust and even very precise welding depths which cannot be achieved with infrared lasers can be reproducibly achieved.
According to the invention, a first component, in particular a copper strip, for example an electrical connection, is arranged on at least one second component, for example a copper plate, in particular a circuit board. The arrangement is such that the first component forms a bend between the two legs, which first component contacts the at least one second component with the two legs. The first component can be arranged in particular with the first leg on the second component and with the second leg on the third component.
Furthermore, the method according to the invention provides that the legs of the first component are welded to the at least one second component. For this purpose, in both welding steps, the respective leg is welded with a leg-specific welding track. This means that the laser provided according to the invention walks over a welding track specific for the foot and produces a corresponding foot-specific weld.
The weld provided according to the invention is based on the following principle: these welds extend from the starting region, i.e. the region in which the laser light is incident on the respective leg and the laser light increases in its power, via a connection arranged between the starting region and the ending region, to the ending region, i.e. the region in which the laser light decreases in its power.
According to the invention, it is provided that the start region and the end region extend farther than the connecting portion toward the side facing away from the bend. This means that the connection is closest to the bend or that the distance between the connection and the bend is smaller than the distance between the bend and the starting region or between the connection and the ending region. For this purpose, the respective weld seam can be designed, for example, in a C-shape or in a bracket-shape.
By combining the provided welding track, if necessary, with a ramp-up and ramp-down of the laser power, the influence of so-called start point spatter, i.e. material ejection when the laser light is first incident on the component, is minimized. Furthermore, the effect of the weld end crater on the joint can be minimized by reducing the laser power. Accordingly, the welding track or weld provided according to the invention results in a very uniform and correspondingly stable connection. In addition, contamination of the corresponding joining device due to material ejection is minimized, and thus the lifetime of the joining device to be used is maximized.
In order to design the weld seam provided according to the invention as compactly as possible and the corresponding joining device as a function thereof, the start region and the end region of the corresponding welding track can be arranged next to one another and behind the corresponding connection. Of course, the position of the starting region, the connecting portion and the end region of the respective weld seam can be adapted according to the method to the geometry of the respective components to be joined, wherein it is always provided that the connecting portion is closest to the bend.
In particular, it can be provided that the first component is a copper strip, the dimensions of which are 1mm to 10mm, in particular 5mm wide and 0.1mm to 0.5mm thick, in particular 2×0.2mm 2 。
It can furthermore be provided that a laser beam is used which has a wavelength of between 450nm and 550nm, in particular 515nm, and/or which has a power of between 500W and 4kW, in particular between 750W and 2.5kW, preferably between 1.2kW and 2.2kW, in analogy to the thickness of the respective component.
Lasers having the above-mentioned characteristics, i.e. green lasers providing a power of between 750W and 2.5kW, have proved to be particularly suitable in tests for carrying out the method according to the invention, since under the characteristics described, a welding depth of preferably 350 μm is obtained at a welding feed speed of between 300mm/s and 750mm/s, in particular 500mm/s, at a focal diameter of between 200 μm and 400 μm, in particular 300 μm.
It can also be provided that the first weld seam and the further weld seam are oriented mirror-symmetrically to one another.
In the case of the legs of the first component being arranged opposite or mirror-symmetrically, a similar connection between the first component and the at least one second component is produced on all legs by means of the corresponding weld seams which are oriented mirror-symmetrically to one another.
It can furthermore be provided that the respective connection is produced during the deep-melt welding process and that the respective starting region and/or the respective end region is produced at least in part during the heat-transfer welding process.
By spatially or structurally transferring the thermal transfer welding process, which typically occurs at the beginning and end of the laser welding process, into the starting region and the end region provided according to the invention, the connection region provided according to the invention can be provided in a mechanically particularly stable manner and in a particularly stable, i.e. fault-resistant process. In other words, the laser provided according to the present invention is provided with a space in which the laser energy can be increased and decreased by the start region and the end region without reducing the quality or area of the connection portion.
It can also be provided that the laser power ramps up for producing the respective starting region and the laser power ramps down for producing the respective end region, so that the highest laser power is provided when producing the connection.
By the ramp-up, i.e. the gradual or continuous increase, of the laser power provided according to the invention in the starting region, material which may be caused by a change in the laser power is splashed away from the connection and accordingly the connection is produced particularly uniformly.
By the ramp down, i.e. gradual or continuous reduction, of the laser power in the termination region, which is provided according to the invention, the so-called weld bead end crater is minimized and the connection is correspondingly homogenized.
It can furthermore be provided that the first welding track extends in a clockwise direction and the further welding track extends in a counter-clockwise direction.
By moving the laser light in the clockwise and counterclockwise directions in the same proportion, a uniform loading, in particular a uniform contamination, of the respective joining device is achieved and thus the lifetime thereof is maximized.
It can furthermore be provided that the first component and/or the further component is made at least in part of copper.
Since copper exhibits a particularly high absorptivity for green laser beams, the method is particularly suitable for copper and corresponding copper alloys.
The invention in a second aspect relates to a joining device for joining a first component to at least one second component, wherein the first component is arranged on the at least one second component with a geometry that extends from a first leg of the first component to a second leg of the first component via a bend of the first component arranged between the first leg and the further leg. The engagement device includes a green laser, an actuator, and a control unit. The control unit is configured to operate the actuator in such a way that the actuator moves the laser along a first welding trajectory, which determines a first weld seam, which extends on the first leg of the first component from a starting region to a terminating region via a connection arranged between the starting region and the terminating region, wherein the starting region and the terminating region extend farther than the connection towards a side facing away from the bend. The control unit is further configured for actuating the actuator in such a way that the actuator moves the laser along a further welding track, which determines a further weld seam, which extends on the further leg from the starting region to the terminating region via a connection arranged between the starting region and the terminating region, wherein the starting region and the terminating region extend farther than the connection towards the side facing away from the bend
The joining device according to the invention is particularly useful for carrying out one possible embodiment of the method according to the invention.
The invention relates in a third aspect to a component connection, which consists of a first component and at least one second component, wherein the first component is arranged on the at least one second component with a geometry which extends from a first leg of the first component to a further leg of the first component via a bend of the first component arranged between the first leg and the further leg, wherein the first leg is connected to the at least one second component by a first weld which extends on the first leg from the starting region to the terminating region via a connection arranged between the starting region and the terminating region, wherein the starting region and the terminating region extend farther than the connection towards a side facing away from the bend, and wherein the further leg is connected to the at least one second component by a further weld which extends on the further leg from the starting region to the terminating region via a connection arranged between the starting region and the terminating region, wherein the starting region and the terminating region extend farther than the connection towards a side facing away from the bend.
Drawings
Other advantages, features and details of the invention will be apparent from the following description, in which embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can be essential for the invention individually or in any combination.
Wherein:
fig. 1 shows a schematic diagram of a method according to the invention;
FIG. 2 illustrates a weld produced according to the method from FIG. 1;
fig. 3 shows a profile of the power provided by a laser arranged according to the invention in order to perform the method from fig. 1;
fig. 4 shows a possible embodiment of the coupling device according to the invention;
fig. 5 shows a possible embodiment of a component connection according to the invention.
Detailed Description
A method 100 is shown in fig. 1. The method comprises an arranging step 101 for arranging the first member on the second member in a geometry extending from the first leg of the first member to the other leg of the first member via a bend of the first member arranged between the first leg and the other leg.
Furthermore, the method 100 comprises a first welding step 103 for welding the first leg with the second component by moving the laser beam along a first welding trajectory, which determines a first weld seam, which extends from the starting region to the ending region via a connection arranged between the starting region and the ending region, wherein the starting region and the ending region extend farther towards a side facing away from the bend than the connection.
Furthermore, the method 100 comprises a further welding step 105 for welding the further leg with the second component by moving the laser beam along a further welding trajectory, which determines a further weld seam, which extends from the starting region to the ending region via a connection arranged between the starting region and the ending region. Wherein the start region and the end region extend farther toward a side facing away from the bend than the connecting portion.
Alternatively, the first member can be arranged with the first leg on the second member and with the other leg on the further member.
Further alternatively, the method 100 may comprise a cutting step 107 for cutting the first component after welding the first component with the at least one further component. Accordingly, the method 100 can be designed as a continuous process for manufacturing a large number of component connections.
A green laser beam is used in method 100.
Fig. 2 shows a weld 200 provided by means of the method 100. The weld 200 includes a start region 201, a finish region 203, and a connection 205 between the start region 201 and the finish region 203. Currently, schematic demarcations 207 and 209 are drawn between the starting area 201 and the connecting portion 205 and between the connecting portion 205 and the ending area 203. Wherein the transition between the connection 205 and the start region 201 and the transition between the connection and the end region 203 run in a gradual or smooth manner.
The starting region 201 and/or the end region 203 are produced at least in part during the heat transfer welding process and extend, in particular only regionally, in the first component, while the connection 205 is produced during the deep-melt welding process and extends through the first component into the second component. Accordingly, the second component is penetrated by the first component in the region of the connection.
Fig. 3 shows a diagram 300, which shows the welding path in [% ] on the abscissa and the power in [ kW ] on the ordinate.
The curve 301 of the laser power set according to the invention over the welding path shows that a continuous increase in the laser power is achieved in the ramp-up phase 303, which provides the starting region set according to the invention. The deep-melt welding process is performed in the highest power stage 305 for providing the connection provided according to the invention and the provision of the termination area provided according to the invention is effected in the ramp-down stage 307.
The minimum power and the maximum power in the ramp up phase 303 or the ramp down phase 307 are selected according to the thickness or the high extension of the material layer to be soldered through.
Fig. 4 shows an engagement device 400 for engaging a first member with a second member. The joining device 400 comprises a green laser 401, an actuator 403 and a control unit 405. The control unit 405 is configured to operate the actuator 403 in such a way that the actuator 403 moves the laser 401 along a first welding trajectory, which determines a first weld seam, which extends on a first leg of the first component from a starting region to a terminating region via a connection arranged between the starting region and the terminating region, wherein the starting region and the terminating region extend farther than the connection towards a side facing away from the curvature of the first component. The control unit 405 is furthermore configured to actuate the actuator 403 in such a way that the actuator 403 moves the laser along a further welding path, which determines a further weld seam, which extends on a further leg of the first component from a starting region to a terminating region via a connection arranged between the starting region and the terminating region, wherein the starting region and the terminating region extend farther than the connection towards a side facing away from the bend.
A component connection 500 is shown in fig. 5. The member connection 500 is comprised of a first member 501 and a second member 503.
The first member 501 includes a first leg 505, a second leg 507, and a bend 509 extending between the first leg 505 and the second leg 507.
The first leg 505 is connected to the second member 503 by means of a first weld 511 extending in a clockwise direction. In the present case, the welding process starts from the right and proceeds to the left, so that an energy input is effected into the component connection 500 from the right to the left by moving the respective joining device.
The second leg 507 is connected to the third member 527 by means of a second weld 513 extending in a counter-clockwise direction.
The start region 517 and the end region 515 of the first weld 511 extend farther to the side facing away from the bend 509, here to the left, than the connection 519 of the first weld 511. Accordingly, the connection 519 of the first weld seam 511 is arranged closer to the curved portion 509 or at a shorter distance than the start region 517 and the end region 515.
The starting region 521 and the ending region 523 of the second weld 513 extend farther to the side facing away from the bend 509, here to the right, than the connection 525 of the second weld 513. Accordingly, the connection 525 of the second weld 513 is arranged closer to the bend 509 or at a shorter distance than the start region 521 and the end region 523.

Claims (11)

1. A method for joining at least two components,
wherein the method (100) comprises the steps of:
-arranging (101) a first member (501) on at least one second member (503, 527) with a geometry extending from a first leg (505) of the first member (501) to another leg (507) of the first member (501) via a bend (509) of the first member (501) arranged between the first leg (505) and the other leg (507);
-welding (103) the first leg (505) with the at least one second member (503, 527) by moving a laser beam along a first welding trajectory, the first welding trajectory determining a first weld seam (511) extending from a starting region (517) to a terminating region (515) via a connection (519) arranged between the starting region (517) and the terminating region (515), wherein the starting region (517) and the terminating region (515) extend farther towards a side facing away from the bend (509) than the connection (519);
-welding (105) the further leg (507) with the at least one second member (503, 527) by moving the laser beam along a further welding trajectory, the further welding trajectory determining a further weld seam (513) extending from a starting region (521) to a terminating region (523) via a connection (525) arranged between the starting region (521) and the terminating region (523), wherein the starting region (521) and the terminating region (523) extend farther towards a side facing away from the bend (509) than the connection (525);
wherein a green laser beam is used.
2. The method (100) of claim 1,
it is characterized in that the method comprises the steps of,
a laser beam having a wavelength between 450nm and 550nm, in particular 515nm, and/or having a power between 750W and 2.5kW, in particular between 1.2kW and 2.2kW, is used.
3. The method (100) according to claim 1 or 2,
it is characterized in that the method comprises the steps of,
the first weld (511) and the further weld (513) are oriented mirror-symmetrically to each other.
4. The method (100) according to any one of the preceding claims,
it is characterized in that the method comprises the steps of,
the respective connection (519, 525) is produced during the deep-melt welding process and/or the respective starting region (517, 521) and the respective end region (515, 523) are produced at least partially during the heat-transfer welding process.
5. The method (100) according to any one of the preceding claims,
it is characterized in that the method comprises the steps of,
in order to produce the respective starting region (517, 521), the laser power ramps up, and in order to produce the respective ending region (515, 523), the laser power ramps down, so that the highest laser power is provided when producing the connection (519, 525).
6. The method (100) according to any one of the preceding claims,
it is characterized in that the method comprises the steps of,
the first weld (511) is produced in a clockwise direction and the further weld (513) is produced in a counter-clockwise direction.
7. The method (100) according to any one of the preceding claims,
it is characterized in that the method comprises the steps of,
the first weld (511) and the further weld (513) are produced substantially in a bracket shape or a C-shape.
8. The method (100) according to any one of the preceding claims,
it is characterized in that the method comprises the steps of,
the first component (501) and/or the further component (503) is at least partially composed of copper.
9. A joining device (400) for joining a first component (501) to at least one second component (503, 527), wherein the first component (501) is arranged on the at least one second component (503, 527) with a geometry which extends from a first leg (505) of the first component (501) to a further leg (507) of the first component (501) via a bend (509) of the first component (501) arranged between the first leg (505) and the further leg (507),
wherein the engagement device (400) comprises:
-a green laser (401),
an actuator (403),
-a control unit (405),
wherein the control unit (405) is configured for actuating the actuator (403) such that the actuator (403) moves the laser (401) along a first welding path, which determines a first weld seam (511) which extends on the first leg (505) from a starting region (515) to a terminating region (515) via a connection (519) arranged between the starting region (517) and the terminating region (515), wherein the starting region (515) and the terminating region (515) extend farther than the connection (519) towards a side facing away from the bend (509), and
the control unit (405) is configured for actuating the actuator (403) such that the actuator (403) moves the laser (401) along a further welding path, which determines a further weld seam (513) which extends on the further leg (507) from a starting region (521) to a terminating region (523) via a connection (525) arranged between the starting region (521) and the terminating region (523), wherein the starting region (521) and the terminating region (523) extend farther towards a side facing away from the bend (509) than the connection (525).
10. The connection device (400) according to claim 9,
it is characterized in that the method comprises the steps of,
the engagement device (400) is configured for performing the method (100) according to any one of claims 1 to 8.
11. A component connection (500) consisting of a first component (501) and at least one second component (503, 527), wherein the first component (501) is arranged on the at least one second component (503, 527) with a geometry extending from a first leg (505) of the first component (501) to a further leg (507) of the first component (501) via a bend (509) of the first component (501) arranged between the first leg (505) and the further leg (507);
wherein the first leg (505) is connected to the at least one second component (503, 527) by a first weld seam (511) which extends on the first leg (503) from a starting region (517) to a terminating region (515) via a connection (519) arranged between the starting region (517) and the terminating region (515), wherein the starting region (517) and the terminating region (515) extend farther than the connection (519) towards a side facing away from the bend (509); and is also provided with
Wherein the further leg (507) is connected to the at least one second component (503, 527) by a further weld seam (513), which extends on the further leg (507) from a starting region (521) to a terminating region (523) via a connection (525) arranged between the starting region (521) and the terminating region (523), wherein the starting region (521) and the terminating region (523) extend farther than the connection (525) towards a side facing away from the bend (509).
CN202280018349.0A 2021-03-01 2022-02-18 Method and device for joining two components Pending CN116981536A (en)

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JP2003145285A (en) 2001-11-12 2003-05-20 Futaba Industrial Co Ltd Method for laser beam welding
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DE102014201715A1 (en) 2014-01-31 2015-08-06 Trumpf Laser Gmbh Method and device for spot welding of workpieces by means of laser pulses with green wavelength
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