| 摘要 |
A jaw assembly for a stretch former, including a jaw body, an annular nose piece carried by the jaw body and defining an insert chamber, and a tapered-wall insert sleeve for being locked into the insert chamber of the nose piece. The insert sleeve defines an internal bore having tapered walls. An insert is positioned in the bore of the insert sleeve. The insert has a plurality of segments collectively defining a profile corresponding to the profile of a workpiece to be stretch-formed, the insert having a tapered outer wall for sliding, interference fit engagement with the tapered walls of the insert sleeve for locking the insert into the jaw and clamping the workpiece into the insert. Pistons are connected to the insert, and the pistons are adapted to move the insert axially within the nose piece among a clamping position wherein the insert clamps the workpiece into the jaw during the stretch forming process, a workpiece remove position retracted from the clamping position for removing the stretch-formed workpiece from the insert and positioning another workpiece into the insert, and an insert remove position retracted from the workpiece remove position at which the insert sleeve and insert may be removed and replaced.
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