A welding method for joining workpieces (10) made of hot-crack-sensitive materials at a lap joint by means of a remote laser welding device. A stitched weld seam (11) with the equivalent strength of a continuous weld seam (11) is produced from a plurality of weld seam sections (13). The power input of the laser beam (21) changes periodically between a minimum and a maximum value while the laser spot (22) describes an anharmonically oscillating pendulum motion on the workpiece surface plane (18). The welding and the formation of the weld seam sections (13) take place in the phases of the power input with the maximum value. The anharmonically oscillating pendulum motion takes place with an oscillation frequency of 2 to 25 Hz and an amplitude in the range of 1 to 20 mm. The method is intended for welding of hot-crack-sensitive aluminum materials, e.g. for production of automobile bodies.

A method is disclosed for welding a first part and second part together. A spacer bead is first formed on the first part by directing a laser beam on one side of the first part. The second part is then assembled to the one side of the first part. The second part is then welded to the first part by directing a second laser beam in a partially circular pattern adjacent the spacer bead. An end portion of the weld terminates radially inside the partially circular pattern.

A galvanized reinforcement beam is continuously formed by uncoiling a roll of galvanized sheet stock in a generally horizontal plane. Protrusions are formed at an upper surface of the sheet stock, which is then roll formed to form a tubular shape with the protrusions abutting a surface of the sheet stock to form venting gaps. The sheet stock is laser welded at the protrusions to continuously form a weld joint, where zinc oxide gas generated from the welding is permitted to escape an interior of the tubular shape through the venting gaps.

The invention relates to an ultrasonic welding device for introducing an embossed surface into a metal foil stack for a cell of a lithium-ion battery, comprising a sonotrode and an anvil, wherein the anvil or the sonotrode has a number of first protrusions projecting from the working surface thereof, in order to form the, in particular strip-like, embossed surface by compacting the metal foil stack. The invention additionally relates to a method for producing a metal foil stack of metal foils for a cell of a lithium-ion battery, in particular using such an ultrasonic welding device.

The invention relates to an ultrasonic welding device for introducing an embossed surface into a metal foil stack for a cell of a lithium-ion battery, comprising a sonotrode and an anvil, wherein the anvil or the sonotrode has a number of first protrusions projecting from the working surface thereof, in order to form the, in particular strip-like, embossed surface by compacting the metal foil stack. The invention additionally relates to a method for producing a metal foil stack of metal foils for a cell of a lithium-ion battery, in particular using such an ultrasonic welding device.

This laser irradiation mechanism includes a control unit which has a function allowing the focal point of a laser beam to describe a circle, performs control such that the focal point describes a spiral, and performs control such that the central axis of the spiral moves along a curved surface.

Local metallization of semiconductor substrates using a laser beam, and the resulting structures, e.g., micro-electronic devices, semiconductor substrates and/or solar cells, are described. For example, a solar cell includes a substrate and a plurality of semiconductor regions disposed in or above the substrate. A plurality of conductive contact structures is electrically connected to the plurality of semiconductor regions. Each conductive contact structure includes a locally deposited metal portion disposed in contact with a corresponding a semiconductor region.

A welded component having mechanical properties in a welding seam region comparable or better to those in the non-influenced base material via a method including producing a hot-rolled steel product made of a high-strength air-hardenable steel with a material thickness of at least 1.5 mm having a chemical composition by mass in one embodiment of: C: 0.03 to 0.4; Mn: 1.0 to 4.0; Si: 0.09 to 2.0; Al: 0.02 to 2.0; P<=0.1; S<=0.1; N: 0.001 to 0.5; Ti: 0.01 to 0.2; Cr: 0.05 to 2.0; B: 0.001 to 0.1; Mo: 0.01 to 1.0; V: 0.01 to 0.2; optionally: Ni: 0.02 to 1.0; Nb: 0.01 to 0.1; and residual iron including conventional steel-accompanying elements, subsequently air hardening the produced hot-rolled steel product, then deforming the hot-rolled steel product in the air-hardened state to form a component, and producing welding connections using a fusion welding process on the component.

An electrical and/or electronic component including at least one electrical outside connecting contact. This contact is a terminal lug, which is attached at one side, for the electrical contacting with a contacting partner. The terminal lug includes a connecting side including a planar connecting surface for the electrical contacting. The exposed end of the terminal lug includes a bending leg, which is bent out of the plane by a compensating angle toward the connecting side. The bending leg includes the connecting surface. The terminal lug is designed such that, when a contacting partner, which is planar at least in this area, makes site contact with the free end of the bending leg with a force applied from the connecting side, a position orientation of the connecting surface is adaptable counter to the compensating angle until a gap-free contact is made between the connecting surface and the planar contacting partner.

A method for joining busbars includes reshaping a raw laser beam to obtain a reshaped laser beam. The reshaped laser beam comprises a core focus portion and at least one ring focus portion. The core focus portion and the ring focus portion are coaxial with respect to one another. The ring focus portion surrounds the core focus portion. The method further includes directing the reshaped laser beam to a plurality of busbars to weld the plurality of busbars to one another along at least one weld seam.