DIE ASSEMBLY.

摘要

The die assembly is disclosed for forming a bead on a cylindrical tube. The assembly includes a holder (24) which secures the tube (10) against axial movement so that a portion of the tube protrudes outwardly from the holder (24) along a predetermined axis and in which the holder has a forming surface (30) circumscribing the tube. The die assembly further includes a first die part (36) having a cylindrical mandrel (40) aligned with and slidably receivable into the outwardly protruding portion of the tube. A tubular cylindrical sleeve is mounted to the first die part (36) so that the sleeve is coaxial with the mandrel (40) and so that the tube extends between the mandrel (40) and the sleeve. The sleeve also includes a conical surface coaxially formed about a free end of the sleeve. A second die part (60) has a throughbore complementary in size and shape to the outer periphery of the sleeve so that the sleeve is slidably receivable within the throughbore.