Mandrel rod holding device

Details Mandrel rod holding device Mandrel rod holding device

1982-03-24

1988-02-16

Spruill, Robert L.

Metal deforming

By use of roller or roller-like tool-element

With tool inside hollow work

B21B 2502

Patent

active

047246979

ABSTRACT:
A combination of a mandrel rod and a mandrel rod holding device for use in a continuous mill for making seamless tubes and being mounted to a driven mandrel rod shifting device, the mandrel rod having a portion of reduced diameter and a shoulder near said end, a two-arm pivot lever is pivoted on the shifting device for pivoting about an axis extending transversely to a direction of extension of the mandrel rod, the direction extending in a direction of rolling; a fork on one arm end of the two-arm pivot lever releasably but form-fittingly holds and engages one end of the mandrel rod and when the two arm pivot lever is in a first pivot position for thereby retarding the mandrel rod as against an action of rolling, the fork engages and retards the shoulder of the mandrel rod, the fork is constructed for releasing the mandrel rod when the two arm pivot lever is in a second pivot position; and a toggle lever has one end pivotally linked to the shifting device and another opposite end is pivotally jointed directly to the other arm end of the two-arm pivot lever, the toggle lever, when in an extended position, causes the two-arm pivot lever to assume a first pivot position thereby maintaining the holding force for the rod, the toggle lever when in a bent position causes the two-arm pivot lever to be in the second pivot position.

REFERENCES:
patent: 4311032 (1982-01-01), Nessi
patent: 4361023 (1982-11-01), Blanquet et al.

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