Cold pressure welding apparatus, coil manufacturing apparatus, coil, and method of manufacturing the same

An apparatus for manufacturing a coil, comprising:

• a first holding part;
• a second holding part disposed opposite to the first holding part;
• and
• a drive part for moving the first holding part and the second holding part, wherein
• the coil in a finished form thereof comprises a helical structure, has a predetermined length along a helical loop of the helical structure and is made of a plurality of flat conductors, wherein each of the flat conductors has a first end and a second end that are flat and are terminal portions of a flat conductor with respect to a direction of the helical loop, and when the plurality of flat conductors is arranged to form a structure having the helical structure by connecting flat conductors at the first and second ends thereof, the structure has a length along the helical loop of the helical structure that is longer than the predetermined length of the coil along the helical loop,
• the first holding part holds one of the plurality of flat conductors, the second holding part holds another of the plurality of the flat conductors, and the first and second holding parts perform pressing the first end of the one of the plurality of flat conductors against the second end of the another of the plurality of flat conductors in the direction of the helical loop so that the two flat conductor are cold-welded and a total length of the two welded flat conductors along the helical loop is shortened by the pressing, and
• the apparatus repeats the pressing for all of the plurality of flat conductors so that a total length of the plurality of welded flat conductors along the helical loop becomes equals to the predetermined length of the coil along the helical loop.