| 摘要 |
A metal collar 32 which is used to construct a coupling for a flexible pressure hose includes a plurality of inner annular beads 41 which are formed by a single stamping operation. The stamping operation is performed by a forming apparatus which includes a collapsible, segmented outer die assembly 53 and a coaxially positioned expandable inner die assembly 51. When formed, the collar 32 will also include a plurality of corresponding outer annular grooves 40 opposite the inner annular beads 41. Due to the segmented construction of the die assemblies 51, 53, both the outer grooves 40 and the inner beads 41 are not continuous, but are formed with a plurality of circumferentially spaced interruptions 43, 44. <IMAGE> |
