The manufacturing method of a rotor includes: a step of preparing a plate that is composed of an austenitic material and that has a projected portion and a part with a width in a rotational axis direction smaller than a width of the projected portion in the rotational axis direction; and a step of forming a welded portion across the projected portion of the plate and a rotation transmitting member by emitting an energy beam on at least a part of the projected portion to melt at least a part of the projected portion.

A rotor manufacturing method comprises an arranging step for arranging a rotor core, which is formed by stacking electromagnetic steel plates, to direct the stacked electromagnetic steel plates toward a vertical direction, a guide inserting step for inserting a rod-like guide into a magnet insertion hole formed to extend in the stacked direction of the rotor core after the arranging step, a sheet inserting step for inserting a plurality of sheets from above the rotor core into the magnet insertion hole along different side surfaces of the guide after the guide inserting step, a guide pull-out step for pulling out the guide from the magnet insertion hole after the sheet inserting step, and a magnet inserting step for inserting a permanent magnet between the plurality of sheets within the magnet insertion hole after the guide pull-out step.

In a method for manufacturing a rotor, each of adhesive placement portions that are provided between a surface of a permanent magnet on the radially inner side and grooves is formed so as to cover a part of an adhesive applied to the permanent magnet on the radially inner side and parts of the adhesive on both sides in the circumferential direction.

A manufacturing method of a rotor may be provided with: arranging a magnet and a thermoplastic in a magnet fixing portion of a rotor core including a laminate in which a plurality of metal plates is laminated, the magnet fixing portion including a hole and/or a trench provided in the rotor core and extending along a lamination direction of the laminate; heating the rotor core while rotating the rotor core around a center axis of the rotor core, with the center axis intersecting a vertical direction; and cooling the rotor core to fix the magnet to the rotor core via the thermoplastic while rotating the rotor core around the center axis, with the center axis intersecting the vertical direction.

A manufacturing method of a laminated iron core by laminating a plurality of blanked members to form a laminate, the laminate including a pair of first and second end surfaces and the plurality of blanked members being interlocked by a caulk in a lamination direction of the laminate, includes: forming the laminate such that a protrusion of the caulk protrudes downward from the first end surface being in a downward state; placing the laminate on support such that the protrusion is not in contact with a support surface of the support; and processing the laminate in a state where the laminate is placed on the support.

A rotary electric machine member manufacturing method includes: a step of providing a motor core by stacking a plurality of electromagnetic steel sheets; and a step of welding the motor core by keyhole welding while pressurizing the motor core in a stacking direction with a welding pressure lower than that at which the thickness of the motor core in the stacking direction levels off. The thickness is a length of the motor core between a first end of the motor core and a second end of the motor core.

Disclosed herein is a method for forming a rotor or stator core. The method includes the steps of: providing a plurality of key punches disposed about an inner diameter area of a sheet of electrical steel and circumferentially spaced from one another and activating a first key punch of the plurality of key punches to cut the electrical steel sheet to remove a portion to form a first key disposed at a first key rotational angle from the line of orientation from a plurality of key rotational angles.

In accordance with at least one aspect of this disclosure, a method of making a carbon rotor includes, providing a quantity of material, densifying the quantity of material, and forming the densified material into a disk shape.

A method for manufacturing a rotor including a rotor core and a permanent magnet, the rotor core having a magnet hole, and the permanent magnet being inserted in the magnet hole and fixed to the rotor core with an adhesive, including the steps of: applying the adhesive, inserting the permanent magnet into the magnet hole of the rotor core, volatilizing the diluting solvent, expanding the expanding agent, and fixing the permanent magnet to the rotor core.

A manufacturing method of a core for a rotary electric machine, the method includes inserting a permanent magnet that is not yet magnetized in a magnet insertion hole that is formed in a rotor core; injecting a magnet fixing material in the magnet insertion hole; curing the magnet fixing material by heating the rotor core and the permanent magnet; and magnetizing the permanent magnet before a temperature of the rotor core and the permanent magnet decreases to a normal temperature, after the curing of the magnet fixing material.