A method for winding a rectangular wire in a winding space of a coil former or of a winding tool to form a linearly wound coil, wherein the rectangular wire in the winding space is wound in at least one layer in an axial laying direction. Before the coil is wound, a guide device is introduced at least partially into the winding space, and the guide device has, in the laying direction, a stop which delimits the rectangular wire in the laying direction; the guide device is entrained, during the winding process, as the winding of the coil in the laying direction increases; and the guide device is withdrawn from the winding space before the last winding is wound in front of a second lateral stop. A linear winding device for performing the method is disclosed.

A method and an automatic machine to manufacture one or more coils around respective articles. The following steps are provided: moving, by means of a main conveyor and along a processing path, a plurality of carriages, each provided with at least one seat designed to house an article; placing, in an input station arranged along the processing path, each article in the seat of a corresponding carriage; coupling, in at least one of two winding stations arranged one after the other along the path, a wire around an article carried by a carriage to create a corresponding coil; using, when they are both working, the two winding stations together and in parallel, having each winding station operate at a first production speed; and using, when a winding station is not working, only the other winding station, operates at a second production speed, higher than the first production speed.

A method and an automatic machine to manufacture one or more coils around respective articles. The following steps are provided: moving, by means of a main conveyor and along a processing path, a plurality of carriages, each provided with at least one seat designed to house an article; placing, in an input station arranged along the processing path, each article in the seat of a corresponding carriage; coupling, in at least one of two winding stations arranged one after the other along the path, a wire around an article carried by a carriage to create a corresponding coil; using, when they are both working, the two winding stations together and in parallel, having each winding station operate at a first production speed; and using, when a winding station is not working, only the other winding station, operates at a second production speed, higher than the first production speed.

Provided are a winding device and a motor. A nozzle that feeds out a coil has: a nozzle hole from which the coil is fed out; an inner-diameter round chamfered part formed on an opening edge of a tip of the nozzle; an outer-diameter round chamfered part formed on the outer peripheral edge of the tip of the nozzle. When the wire diameter of the coil is defined as c, the inner diameter of the nozzle hole is defined as in, the radius of curvature of the inner-diameter round chamfered part is defined as Rin, and the radius of curvature of the outer-diameter round chamfered part is defined as Rout, they satisfy 1.2cin1.4c, 0.5cRinc, and 0.25cRout0.5c.

Provided are a winding device and a motor. A nozzle that feeds out a coil has: a nozzle hole from which the coil is fed out; an inner-diameter round chamfered part formed on an opening edge of a tip of the nozzle; an outer-diameter round chamfered part formed on the outer peripheral edge of the tip of the nozzle. When the wire diameter of the coil is defined as c, the inner diameter of the nozzle hole is defined as in, the radius of curvature of the inner-diameter round chamfered part is defined as Rin, and the radius of curvature of the outer-diameter round chamfered part is defined as Rout, they satisfy 1.2cin1.4c, 0.5cRinc, and 0.25cRout0.5c.

Provided is a winding device for winding a coil around a tooth. The winding device includes a nozzle that feeds out the coil. The nozzle includes a nozzle hole through which the coil is fed out, an inner-diameter round chamfered part formed on an opening edge of the nozzle hole on a side where the coil is fed out, and an outer-diameter round chamfered part formed on an outer peripheral edge at an end on the side where the coil is fed out. When a wire diameter of the coil is defined as c, an inner diameter of the nozzle hole is defined as in, a radius of curvature of the inner-diameter round chamfered part is defined as Rin, and a radius of curvature of the outer-diameter round chamfered part is defined as Rout, each of c, in, Rin, and Rout satisfies: 1.2cin1.4c, 0.5cRinc, and 0.25cRout0.5c.

Provided is a winding device for winding a coil around a tooth. The winding device includes a nozzle that feeds out the coil. The nozzle includes a nozzle hole through which the coil is fed out, an inner-diameter round chamfered part formed on an opening edge of the nozzle hole on a side where the coil is fed out, and an outer-diameter round chamfered part formed on an outer peripheral edge at an end on the side where the coil is fed out. When a wire diameter of the coil is defined as c, an inner diameter of the nozzle hole is defined as in, a radius of curvature of the inner-diameter round chamfered part is defined as Rin, and a radius of curvature of the outer-diameter round chamfered part is defined as Rout, each of c, in, Rin, and Rout satisfies: 1.2cin1.4c, 0.5cRinc, and 0.25cRout0.5c.

Some aspects of the present disclosure pertain to spherical devices that comprise a wire having a memorized shape comprising a spherical outer wire layer and a spherical inner wire layer disposed within the spherical outer wire layer. Other aspects of the disclosure pertain to methods of forming such devices, mandrels for forming such devices, and methods of using such devices.

A coil supply device is configured to supply a material coil to a coil forming system for forming a hairpin-type stator coil and includes a feeding case, a feeding belt connected to a belt driver disposed at the feeding case, coil gripper assemblies arranged at the feeding belt with intervals along a belt travel direction, an upper guide rail disposed an upper portion of the feeding case and having an upper cam projection section configured to come into cam contact with an upper cam mechanism, and a lower guide rail disposed at a lower portion of the feeding case and having a lower cam projection section configured to come into cam contact with a lower cam mechanism.

A coil supply device is configured to supply a material coil to a coil forming system for forming a hairpin-type stator coil and includes a feeding case, a feeding belt connected to a belt driver disposed at the feeding case, coil gripper assemblies arranged at the feeding belt with intervals along a belt travel direction, an upper guide rail disposed an upper portion of the feeding case and having an upper cam projection section configured to come into cam contact with an upper cam mechanism, and a lower guide rail disposed at a lower portion of the feeding case and having a lower cam projection section configured to come into cam contact with a lower cam mechanism.