Reversible mandrel bar assembly

Details Reversible mandrel bar assembly Reversible mandrel bar assembly

1999-03-25

1999-12-28

Butler, Rodney

Metal deforming

By use of roller or roller-like tool-element

With tool inside hollow work

B21B 1710

Patent

active

060065753

ABSTRACT:
The present invention is of a mandrel bar assembly for a seamless pipe mill. The assembly includes a pair of tooling sections each having a tapered end, a reduced diameter portion axially inward of the tapered end adapted to be gripped by a retaining means of the mill, and a working portion adjacent the reduced diameter portion extending from the reduced diameter portion to the end opposite the tapered portion. The assembly includes a coupling for connecting the tooling sections together end-to-end with the tapered ends facing oppositely outward therefrom. An adapter is provided to cover the reduced diameter portion and provide a working surface thereon of one tooling section that is to be positioned as the lead end into the mill. When one tooling section wears the adapter can be removed and installed on the other tooling section, and the assembly is reversed end-to-end to use the other tooling section as the lead end, extending the useful life of the assembly.

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