| 摘要 |
A method of making a pulley with a number of V-shaped grooves, especially having a stepped shape, comprises a rim or rims and a core which are separately formed by an appropriate plastic process and are fixed or connected fixedly to each other by a metallurgical or mechanical processing. According to one embodiment, a short pipe-shaped blank is rolled to produce a rim with a number of V-shaped grooves, and thereafter the rim or rims is fixed to a core by the action of the rolling to interfit serrations on the rim and core. |
