Patent ID: 6209191
Filing Date: 2001-04-03
Classification: B21H,B21K,F16D,F16H,Y10T

Abstract:
A method for manufacturing an electromagnetic clutch having a pulley member including a pulley groove on which a V-belt is hung, and a rotor member rotating with said pulley member integrally and including a double cylindrical portion and a cover member covering an end side of said double cylindrical portion, said method comprising:a rotor member forming process in which a single piece disk material is plastic-formed to form an inner cylindrical portion of said double cylindrical portion and said cover member;a slitting process in which said single piece disk material is slit inwardly from an outside thereof in a radial direction of said disk material to form an outer cylindrical portion of said double cylindrical portion and a pulley corresponding portion which will be said pulley member, said pulley corresponding portion extending from a protrusion portion protruding outwardly from said outer cylindrical portion; anda pulley member forming process in which said pulley corresponding portion is plastic-formed to form said pulley groove.