A positioning device may be used to peripherally position copper rods about a center axis that defines an axial direction. Each of the copper rods may be generally U-shaped and may have a first leg portion and a second leg portion. The positioning device may include a positioning body, a rotary body, locking means, and a rotary drive. Grooves of an outer peripheral surface of the positioning body may receive the first leg portions of the copper rods, which can be locked in place by the locking means. The rotary body may be rotatable about the positioning body and may include guide channels that receive the second leg portions of the copper rods. The rotary drive can cause the rotary body and the positioning body to rotate relative to one another, to pivot the second leg portions inwardly into the grooves of the positioning body.

An aligning apparatus is provided for aligning coil segments in an annular shape to form an aligned coil. Each of the coil segments has a pair of first and second leg portions. The aligning apparatus includes an outer jig and an inner jig. The outer jig has partitioning members arranged in a radial fashion. The partitioning members are spaced at such intervals as to allow each of the first leg portions of the coil segments to be inserted between one circumferentially-adjacent pair of the partitioning members. The inner jig has hole-forming members arranged radially inside the partitioning members of the outer jig. Each of the hole-forming members has formed therein a hole in which one of the second leg portions of the coil segments is to be inserted. Moreover, the hole-forming members are configured to be rotatable relative to the outer jig in a circumferential direction and radially movable.

The invention relates to a device and method for forming a conductor pack provided for inserting into a stator or rotor, wherein the device in this regard comprises an inner holding device with receiving portions arranged along an outer circumference of the inner holding device and provided for receiving, at least in sections, first rod sections with first conductor ends of substantially U-shaped conductor elements, a positioning device for pre-positioning second rod sections with second conductor ends of the conductor elements, which second rod sections are connected to the first rod sections by a substantially arc-shaped connection section, at least one gripping device arrangeable around the inner holding device in the circumferential direction with gripping elements adjustable in the radial direction towards the inner holding device, said gripping device being formed for gripping rod section pairs, each formed from a pre-positioned second rod section and an adjacent, first rod section, and, in this regard, the receiving portions are dimensioned such that the first rod sections are rotatably receivable in the receiving portions at least in sections, and the positioning device, for pre-positioning the second rod sections, comprises a positioning element spaced apart from the inner holding device outwards in the radial direction, which positioning element is circumferentially drivable in the circumferential direction of the inner holding device and simultaneously adjustable radially inwards.

A control device moves a split claw (11) holding a projecting portion (4d) of an eighth-layer coil segment (4) in a counterclockwise direction D1. At this time, the control device moves first to third extended blades (13a) to (13c) in an outward direction D3 so that the projecting portion (4d) of the eighth-layer coil segment (4) is bent in the outward direction D3. Then, the control device moves the first to third extended blades (13a) to (13c) in an inward direction D4. Through the above steps, the projecting portion (4d) of the eighth-layer coil segment (4) is bent in the counterclockwise direction D1 while being bent in the outward direction D3. As a result, a return force tending to return in the inward direction D4 is generated by an elastic deformation force.

A stator manufacturing apparatus is equipped with spindles as twisting and bending jigs, an inner guide having a first supply flow path and a suction flow path formed in the interior thereof, and an outer guide having a second supply flow path formed in the interior thereof. Further, the spindles have receiving members in which insertion recesses are formed. Through holes are formed in the receiving members, and the receiving members are formed with lateral holes therein which allow the interiors of the insertion recesses to communicate with each other.

A method for forming a coil, including the steps of: forming a spiral coil-segment forming member that includes a plurality of coil-segment forming portions each having a shape corresponding to a coil segment including a straight slot body that is accommodated in a slot of a stator core and a non-straight coil end that projects from the stator core in a rotational axis direction of the stator core; and dividing the spiral coil-segment forming member to form a plurality of the coil segments from the plurality of coil-segment forming portions.

An apparatus for assembling a winding of hairpins is provided. The apparatus has a feeding section, an insertion section into a winding assembly cylinder, and a handling section having at least two arms configured so that when the end of one arm faces the feeding section, the end of the other arm faces the insertion section. Each arm has a gripper for picking and releasing a hairpin, the gripper being slidingly mounted along an extension direction of the corresponding arm. The insertion section has an assembly drum moved by a rotary mechanism, both mounted on the same axis, perpendicular to the rotation axis of the arms. The assembly drum has a series of inserts on its outer surface defining a series of radially open slots, the rotary mechanism being sized to leave free space between the arm and the slots. A method for assembling a winding of hairpins is also provided.

In one embodiment, a stator coil that includes a first turn with two or more strands is provided. The first turn includes first and second opposite sides, a coil termination at a first end of the first turn and an inversion region disposed at a second end, opposite the coil termination. The stator coil also includes at least one additional turn with two or more strands. The at least one additional turn includes first and second opposite sides, and an inversion region located adjacent to the inversion region of the first turn. The first and second sides of the first turn are inverted relative to the first and second sides of the at least one additional turn outside their respective inversion regions.

In one embodiment, a stator coil that includes a first turn with two or more strands is provided. The first turn includes first and second opposite sides, a coil termination at a first end of the first turn and an inversion region disposed at a second end, opposite the coil termination. The stator coil also includes at least one additional turn with two or more strands. The at least one additional turn includes first and second opposite sides, and an inversion region located adjacent to the inversion region of the first turn. The first and second sides of the first turn are inverted relative to the first and second sides of the at least one additional turn outside their respective inversion regions.

A bending apparatus (10) includes an upper first die (11), an upper second die (12), a lower die (13), a control unit (20), an upper first moving mechanism (21), an upper second moving mechanism (22), a lower moving mechanism (23), a holding die (31), and a moving and rotating mechanism (32). The lower die (13) is moved in an upper direction after the upper first die (11) and the upper second die (12) are moved to the front, whereby four coil segments (4) are bent. When the upper second die (12) is moved to a first withdrawal position in the rear direction after the four coil segments (4) are bent, a working space for the holding die (31) is ensured.