The invention relates to a method for the media-tight connection of two plate-shaped components (1, 2), in particular two monopolar plates for the production of a bipolar plate, comprising the steps of: placing the first component (1) on a surface of a clamping device, placing the second component (2) on the first component (1), closing the clamping device, setting a first weld seam (3) on the second component (2), wherein a welding depth (t) is selected that is less than a material thickness (s) of the second component (2), with the result that a bend (5) is formed along the first weld seam (3) owing to the welding distortion, via which bend the second component (2) comes into linear contact with the first component (1), setting a connecting weld seam (4) on the first weld seam (3), with the result that the two components (1, 2) are welded to one another along the bend (5).

The invention relates to a method for the media-tight connection of two plate-shaped components (1, 2), in particular two monopolar plates for the production of a bipolar plate, comprising the steps of: placing the first component (1) on a surface of a clamping device, placing the second component (2) on the first component (1), closing the clamping device, setting a first weld seam (3) on the second component (2), wherein a welding depth (t) is selected that is less than a material thickness (s) of the second component (2), with the result that a bend (5) is formed along the first weld seam (3) owing to the welding distortion, via which bend the second component (2) comes into linear contact with the first component (1), setting a connecting weld seam (4) on the first weld seam (3), with the result that the two components (1, 2) are welded to one another along the bend (5).

A device for moving at least one cutting and welding arrangement able to cut, then weld a tail of a first metal strip to a head of a second metal strip, includes at least one first carriage holding at least one welding head. The first carriage is movable over a guide path following a first course across a transverse strip region. At least one second carriage is movable separately from the first carriage and holds a cutting head. The second carriage is movable on a guide path following a second course. The welding head is used exclusively for a welding mode, the second carriage is used exclusively for a cutting mode and the two carriages have parked positions on either side of the tail and head widths of the strips. A welding method which is associated with the device is also provided.

A device for moving at least one cutting and welding arrangement able to cut, then weld a tail of a first metal strip to a head of a second metal strip, includes at least one first carriage holding at least one welding head. The first carriage is movable over a guide path following a first course across a transverse strip region. At least one second carriage is movable separately from the first carriage and holds a cutting head. The second carriage is movable on a guide path following a second course. The welding head is used exclusively for a welding mode, the second carriage is used exclusively for a cutting mode and the two carriages have parked positions on either side of the tail and head widths of the strips. A welding method which is associated with the device is also provided.

In a manufacturing method of a tailored blank including a first steel plate and a second steel plate to be joined by butt welding, the first and second steel plates are butt welded with a laser beam. The laser beam has a power density q1 in a first region, a power density q2 in a second region, a power density q3 in a third region, and a power density q4 in a fourth region. The power density q1, the power density q2, the power density q3, and the power density q4 satisfy a relationship of q1>q2>q3>q4.

In a manufacturing method of a tailored blank including a first steel plate and a second steel plate to be joined by butt welding, the first and second steel plates are butt welded with a laser beam. The laser beam has a power density q1 in a first region, a power density q2 in a second region, a power density q3 in a third region, and a power density q4 in a fourth region. The power density q1, the power density q2, the power density q3, and the power density q4 satisfy a relationship of q1>q2>q3>q4.

Disclosed is a method for an all-laser hybrid additive manufacturing. After a matrix is obtained by means of selective laser melting forming, a subtractive forming is carried out on the matrix by means of a pulse laser to form a cavity, and the cavity is then packaged to obtain a forming material with an internal cavity structure. A laser precision packaging method is used in the method based on the melting of the laser selective region. Also disclosed is the apparatus, comprising a laser unit (2), a control unit (4) and a forming unit (6). The laser unit is in light path connection with the forming unit, and the control unit is electrically connected with the laser unit and the forming unit respectively. The laser unit comprises a first laser light source to and a second laser light source. The forming unit comprises a welding unit (68), and the welding unit is controlled by the control unit and is matched with the laser unit for the additive manufacturing.

Disclosed is a method for an all-laser hybrid additive manufacturing. After a matrix is obtained by means of selective laser melting forming, a subtractive forming is carried out on the matrix by means of a pulse laser to form a cavity, and the cavity is then packaged to obtain a forming material with an internal cavity structure. A laser precision packaging method is used in the method based on the melting of the laser selective region. Also disclosed is the apparatus, comprising a laser unit (2), a control unit (4) and a forming unit (6). The laser unit is in light path connection with the forming unit, and the control unit is electrically connected with the laser unit and the forming unit respectively. The laser unit comprises a first laser light source to and a second laser light source. The forming unit comprises a welding unit (68), and the welding unit is controlled by the control unit and is matched with the laser unit for the additive manufacturing.

Laser welding device (1000) includes: laser oscillator (100); optical fiber (300) that transmits a laser beam (LB) generated in laser oscillator (100); laser beam emitting head (400) that is attached to the emission end of optical fiber (300) and emits laser beam (LB) toward workpiece (600); manipulator (500) with laser beam emitting head (400) attached thereto; and controller (200) that controls laser beam emitting head (400) so as to cause laser beam (LB) to be scanned three-dimensionally on the surface of workpiece (600). Controller (200) controls laser beam emitting head (400) so as to change a focal position of laser beam (LB) in accordance with a shape of a welded portion in workpiece (600).

A method for manufacturing a profile member for a suspended ceiling system, comprising forming a sheet metal material into an elongate T-shaped profile member with a web having two web side walls and a pair of oppositely disposed flanges projecting from a bottom portion of the web, and laser welding the elongate T-shaped profile member for providing a laser weld joint extending in a longitudinal direction of the T-shaped profile member and joining the two web side walls to each other. The step of laser welding comprises alternatingly performing a first operation and a second operation, the second operation being different from the first operation, whereby a laser weld joint is provided comprising along its extension alternating welded first sections associated to the first operation and second sections associated to the second operation. The present invention also relates to an elongate profile member provided with a laser weld joint.