| 摘要 |
PROBLEM TO BE SOLVED: To easily provide a forming method for a drum with a boss, being lightweight and having high rigidity. SOLUTION: A discoid metallic thick plate is subjected to a series of cold-press forming composed of burring, coining, drawing, and extrusion. The drum is formed by giving a uniform working ratio to the outer periphery, the inner periphery, and the bottom part of the drum. COPYRIGHT: (C)2005,JPO&NCIPI
|
