| 摘要 |
A collapsible drive shaft (20) and method of making the same. The collapsibl e drive shaft (20) includes a tubular member having first (24) and second (22) portions that are integrally formed as a one-piece member. The first portion has splines (26) formed on an exterior surface thereof. The second (22), opposite portio n has both outer (Do2) and inner diameters (Di2) that are greater than the outer diameter (Do 1) of the first portion. The method includes placing a tubular metal blank into a hydroforming die (70) having a die cavity and expanding the blank by pressurizing the interior of the blank with hydroforming fluid. During the hydroforming process, the first portion of the blank is expanded to form splines while the second portion is expanded to form inner and outer diameters that are greater than the outer diameter of the first portion. |
