TORQUE TRANSMITTING MEMBER IN AUTOMOTIVE TRANSMISSION, METHOD FOR FORMING SPLINE TEETH, AND APPARATUS FOR FORMING THE SAME

摘要

A method for forming spline teeth (12) on the outer periphery of a cylindrical part (5) of a work having the boss (5) integrally formed at the center of a metallic disk plate (3a), which comprises disposing the work so that the boss (5) fits with a boss guiding mandrel (16) arranged at the center of a cylindrical die (14) on which the teeth (12) for ironing spline teeth are formed, pressing the disk plate (3a) with a punch, fitting the boss (5) into a gap between the die (14) and the mandrel (16), and forming spline teeth (5a) on the external periphery of the boss (5) by ironing.