Coil manufacturing apparatus, and coil manufacturing method
The coil manufacturing apparatus includes: a bending device configured to bend each of a plurality of flat conductors; and a welding device configured to weld the plurality of flat conductors. The bending device is a unit configured to bend each of the flat conductors before being supplied to the welding device. The welding device includes a first holding portion and a second holding portion disposed facing each other, and a driving portion configured to move the first holding portion and the second holding portion. The helical structure body is formed by pressing end faces of the one flat conductor and the another flat conductor against each other along a strip longitudinal direction and joining the flat conductors through pressure welding while reducing a distance in the strip longitudinal direction. The coil manufacturing apparatus includes a removing device configured to remove an unwanted portion of the flat conductors generated by welding.
1 . A coil manufacturing apparatus configured to form a helical structure body by joining a plurality of flat conductors, the apparatus comprising:
a welding device configured to form a welded product of the plurality of flat conductors; and
a removing device configured to remove a portion of the welded product, wherein
the welding device is a unit configured to press end faces of one flat conductor and another flat conductor among the plurality of flat conductors against each other along a strip longitudinal direction and to join the one flat conductor and the another flat conductor to form the welded product that is to be the helical structure body,
the welded product that is taken out from the welding device is configured such that all one turn regions of the helical structure body are in a wider state than the helical structure body in a completed state,
the removing device is a unit configured to have a coil piece holding portion and a cutting unit and to remove a burr generated by pressing of the plurality of flat conductors,
the coil piece holding portion holds the welded product after being taken out from the welding device so as to maintain a shape of the welded product at least in a vicinity of a region where the burr is formed, and
the cutting unit relatively moves with respect to the coil piece holding portion to remove the burr.
2 . The coil manufacturing apparatus according to claim 1 , wherein the coil piece holding portion has a first coil piece holding portion and a second coil piece holding portion, and each of the first and second coil piece holding portions holds the plurality of flat conductors constituting one of the regions for one turn.
3 . A coil manufacturing method for forming a helical structure body by joining a plurality of flat conductors, the method comprising:
a welding step of forming a welded product, which is to be the helical structure, by pressing end faces of one and another one of the plurality of flat conductors against each other along a strip longitudinal direction and joining the one and the another one of the plurality of flat conductors; and
a removing step of removing a burr generated in the welded product, wherein the welded product is configured by a welding device such that all one turn regions of the helical structure body are wider than the helical structure body in a completed state, and
in the removing step, a coil piece holding portion of a removing device holds the welded product after the welded product has been taken out from the welding device and the burr is removed while the welded product is held so as to maintain a shape of the welded product at least in a vicinity of a region where the burr is formed.
4 . The coil manufacturing method according to claim 3 , further comprising a coating step of integrally coating the helical structure body with a coating.
5 . A coil manufacturing system comprising a plurality of the coil manufacturing apparatuses according to claim 1 .