Patent ID: 6282789
Filing Date: 2001-09-04
Classification: B21J,B21K,B23P,B24B,F16H,Y10T

Abstract:
A method of manufacturing a traction roller for a continuously variable transmission, the traction roller being held between input and output discs and rotatably supported by a support member through a pin arranged through a central axial hole of the traction roller, wherein a load input from the traction roller is received by the support member through a rolling element disposed in a side wall of the traction roller located at one end thereof as viewed in an axial direction of the traction roller, the method comprising the steps of:placing a layer on a cylindrical material having a center hole and a volume substantially equal to the traction roller;performing a pressure forging of said cylindrical material in an axial direction thereof to obtain a work having an axial length substantially equal to that of the traction roller;performing a die forging of said work in an axial direction thereof to form the side wall of the traction roller and an outer peripheral surface thereof; andgrinding said work subjected to said die forging to obtain a finished product of the traction roller.