Abstract: A method for butt welding of flat metal blanks in a welding machine, where two metal blanks are placed on a conveyor unit by feed devices and secured. Two edges of two metal blanks to be welded together are placed together to form a butt joint with the smallest possible gap and then welded together using a welding laser. The gap width is measured and controlled using the measured values from the welding process. The gap width is measured using a reflected-light method and the true gap width via the transmitted light method in such a way that the missing area and the missing volume in the gap can be estimated accurately.

Abstract: An arrangement including a welding arm (2) for a resistance seam welding machine and a roller head (1) fastened thereon, which has a stator (3) and an electrode roller (4) which is supported as a rotor on the stator (3) in a rotatable way, wherein the stator (3) protrudes over the electrode roller (4) with fastening extensions (5) on both sides of the electrode roller (4). The welding arm (2) has a reception opening (6) for the roller head (1), which is formed between two limiting walls (7) facing each other, which themselves have fastening reception openings (8) for the fastening extensions (5). The roller head (1) is arranged inside the reception opening (6) in such a way that the electrode roller (4) protrudes outside the reception opening (6) with a part of its circumferential boundary and the fastening extensions (5) are arranged inside the fastening reception openings (8).

Abstract: A method for butt welding of flat metal blanks in a welding machine, where two metal blanks are placed on a conveyor unit by feed devices and secured by holding means. Two edges of two metal blanks to be welded together are placed together to form a butt joint with the smallest possible gap and then welded together using a welding laser. The gap width is measured and controlled by means of the measured values from the welding process. The gap width is measured by means of the reflected-light method and the true gap width by means of the transmitted light method in such a way that the missing area and the missing volume in the gap can be estimated accurately.

Abstract: A method for butt-welding of sheet metal, especially bodywork in the motor vehicle industry, where at least two flat workpieces with any desired contours are fed to a machining process. In a first sub-process, the workpieces are positioned in relation to one another forming a minimal gap and secured in place with holding means. In another sub-process, the position and width of the gap are measured continuously immediately before welding together and the measurements are used to control a laser welding head. The laser welding head is fit with a rotatable twin-spot lens, where the relative alignment of a main spot to an auxiliary spot is controlled depending on the absolute position of the gap and the gap width during the welding process while the processing lens of the laser welding head is rotated around the laser beam axis with the angle of rotation alpha.

Abstract: A method for butt-welding of sheet metal, especially bodywork in the motor vehicle industry, where at least two flat workpieces with any desired contours are fed to a machining process. In a first sub-process, the workpieces are positioned in relation to one another forming a minimal gap and secured in place with holding means. In another sub-process, the position and width of the gap are measured continuously immediately before welding together and the measurements are used to control a laser welding head. The laser welding head is fit with a rotatable twin-spot lens, where the relative alignment of a main spot to an auxiliary spot is controlled depending on the absolute position of the gap and the gap width during the welding process while the processing lens of the laser welding head is rotated around the laser beam axis with the angle of rotation alpha.

Abstract: To increase cycle time, and therefore to lower production costs, in the industrial production of welded sheet metal parts—in particular tailored blanks for the automotive industry—the invention describes a method based on a constant-speed conveying system and a flying optics system, which method manages without complex cooling of the hot weld seam and uses means for holding the workpieces on one side with a high force on the conveyor belt. In this way it is possible greatly to reduce the negative influence the blank spacing has on the cycle time of the machine. Overall, fewer drives are required in the machine and it is possible for a simplified machine concept to be employed without detriment to the quality of the blanks to be welded.

Abstract: To increase cycle time, and therefore to lower production costs, in the industrial production of welded sheet metal parts—in particular tailored blanks for the automotive industry —the invention describes a method based on a constant-speed conveying system and a flying optics system, which method manages without complex cooling of the hot weld seam and uses means for holding the workpieces on one side with a high force on the conveyor belt. In this way it is possible greatly to reduce the negative influence the blank spacing has on the cycle time of the machine. Overall, fewer drives are required in the machine and it is possible for a simplified machine concept to be employed without detriment to the quality of the blanks to be welded.

Abstract: The invention relates to a method for working a strip continuously supplied from a coil, using the same equipment for roll bending, cutting and welding in a single combined machine, such that an end product of the required quality is efficiently produced.