Patent ID: 6708383
Filing Date: 2004-03-23
Classification: F16G,Y10T

Abstract:
A method for setting a free-state diameter of each metal ring of a metal belt for a continuously variable transmission upon cutting of said metal ring at a predetermined value based on a residual stress in order to apply said residual stress to said metal ring, the method comprising the steps of:calculating variations in a stress on an inner peripheral surface of said metal ring and variations in a stress on an outer peripheral surface of said metal ring during operation of the continuously variable transmission; calculating an amplitude and a middle value of the stress on the outer peripheral surface of said metal ring; calculating a corrected amplitude of the stress on the outer peripheral surface from said amplitude and said middle value of the stress on the outer peripheral surface; calculating an amplitude and a middle value of the stress on the inner peripheral surface of said metal ring; calculating a corrected amplitude of the stress on the inner peripheral surface from said amplitude and said middle value of the stress on the inner peripheral surface; and setting a free-state diameter based on said corrected amplitude of the stress on the outer peripheral surface and said corrected amplitude of the stress on the inner peripheral surface.