Apparatus for supporting the mandrel back-up bar of an axial...

Details Apparatus for supporting the mandrel back-up bar of an axial... Apparatus for supporting the mandrel back-up bar of an axial...

B - Operations, Transporting

21

B

80/13

B21B 17/00 (2006.01) B21B 25/02 (2006.01)

Patent

CA 1217665

ABSTRACT Apparatus is described for increasing the rigidity and providing centering support for a mandrel back-up bar on the rolling and piercing axis of a press-piercing rolling mill, the apparatus comprising a plurality of substantially cradle-like structures aligned along the piercing axis and each supporting a trio of rollers which are angularly displaceable towards and away from the axis with substantially self-centering movements. Each trio of rollers forms a substantially rigid rink around the mandrel back-up bar but provides a basically bezel-type support for the pierced intermediate blank as it is advanced along the bar.

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