A manufacturing method for a laminated iron core for joining multiple iron core laminae by successively forming multiple spot-shaped welded parts on the multiple iron core laminae that are stacked includes: a first welding step of forming first welded parts, which constitute multiple welded parts, at a first pitch in a stacking direction on a first iron core lamina group composed of a part of the multiple iron core laminae; and a second welding step of forming, after the first welding step, second welded parts, which constitute the multiple welded parts, at a second pitch in the stacking direction on a second iron core lamina group composed of a part of the multiple iron core laminae adjoining the first iron core lamina group, wherein the second pitch is greater than the first pitch.

A manufacturing method for a laminated iron core for joining multiple iron core laminae by successively forming multiple spot-shaped welded parts on the multiple iron core laminae that are stacked includes: a first welding step of forming first welded parts, which constitute multiple welded parts, at a first pitch in a stacking direction on a first iron core lamina group composed of a part of the multiple iron core laminae; and a second welding step of forming, after the first welding step, second welded parts, which constitute the multiple welded parts, at a second pitch in the stacking direction on a second iron core lamina group composed of a part of the multiple iron core laminae adjoining the first iron core lamina group, wherein the second pitch is greater than the first pitch.

A method for manufacturing a rotor for an electrical machine having a rotor support and a laminated core includes positioning the laminated core on a first component of the rotor support, where the laminated core at least partially radially encloses the first component relative to an axis of rotation of the electrical machine. The method further includes welding an axial end face of the first component of the rotor support with a second component of the rotor support to form the rotor support by friction welding, where the laminated core is fixed on the rotor support by fastening elements which respectively enclose the laminated core on both sides of the laminated core in an axial direction. At least one of the fastening elements is formed by a weld bead.

A method for manufacturing a rotor for an electrical machine having a rotor support and a laminated core includes positioning the laminated core on a first component of the rotor support, where the laminated core at least partially radially encloses the first component relative to an axis of rotation of the electrical machine. The method further includes welding an axial end face of the first component of the rotor support with a second component of the rotor support to form the rotor support by friction welding, where the laminated core is fixed on the rotor support by fastening elements which respectively enclose the laminated core on both sides of the laminated core in an axial direction. At least one of the fastening elements is formed by a weld bead.