Patent ID: 6347980
Filing Date: 2002-02-19
Classification: B24B

Abstract:
A method for grinding a traction surface of a half-toroidal CVT disk, comprising the steps of:preparing a grinding machine including a hold mechanism holding the half-toroidal CVT disk having a given machining allowance, and a machining mechanism including a tool for grinding the half-toroidal CVT disk, the grinding of said grinding machine being performed in a state that one of the half-toroidal CVT disk and said tool is inclined at a predetermined angle with respect to the other; and setting a cutting angle, which is an angle to be formed by a cutting direction of said tool with respect to an axis of the half-toroidal CVT disk, in the range of Â±15Â° with respect to an angle that a first cutting magnification at a time that said tool contacts with an outer periphery position of the traction surface of the half-toroidal CVT disk is substantially equal to a second cutting magnification at a time that said tool contacts with an inner periphery position of the traction surface, each of said first and second cutting magnification at the time that said tool contacts with an inner periphery position of the traction surface, each of said first and second cutting magnifications being a ratio of an apparent machining allowance to the given machining allowance.