| 摘要 |
A pipe blank feeding and rotating mechanism including a floating chuck, a mandrel rod end clamp and associated feed and turning gear mechanism is disclosed as a part of a cold rolling, thin-walled pipe mill assembly. The blank chuck has a through passage surrounding and enabling relative axial travel of a pipe blank over a mandrel rod. The chuck head has a shank by which it is mounted in a spindle which in turn is rotatable in a chuck body. The chuck head (and its shank) are axially spring biased to permit an increment of axial shift (float) of the head against spring bias relative to the spindle and body as a reaction to axially moving a pipe blank into the pipe blank rolling area. Self containing locking components coacting between the chuck shank and the chuck spindle permit disabling of the floating aspect. The mandrel end clamp has quick release, positive locking jaws which non-rotatably secure the clamp to the end of a mandrel rod, yet the clamp and the mandrel rod can be rotated. The mill has gear mechanism connected to the mandrel rod end clamp and to both the chuck spindle and to the chuck body to provide correlated rotation of the blank chuck head and mandrel rod clamp, and also, via the chuck body, to provide an axial feeding movement to the blank chuck.
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