RING PRODUCTION METHOD, DEVICE THEREFOR, AND RING

摘要

A ring manufacturing method of the present invention comprises:
a laminating step laminating a plurality of metal plates; a junction step jointing the plurality of metal plates by heating and giving pressure; a twisting step heating and twisting the plurality of metal plates after the junction step;
an angle stick processing step performing twist processing to the plurality of metal plates to make angle stick shape; a slit formation step forming two longitudinal slits in angle stick component; a ring formation step opening the slits from inside thereof to make two ring components (40,42); and a cutting step cutting and separating the two ring components into two rings.