Automatic cold-pilger mill stop apparatus

Details Automatic cold-pilger mill stop apparatus Automatic cold-pilger mill stop apparatus

1992-01-21

1993-06-08

Larson, Lowell A.

Metal deforming

With randomly-actuated stopping

Responsive to condition of work or product

72 14, 72 24, 72214, 72252, B21B 2104, B21B 3916

Patent

active

052169111

ABSTRACT:
An automatic stop apparatus for use in combination with a cold-pilger mill to reduce the amount of tube scrap generated during a cold-pilgering operation includes a first control scheme for stopping the advancement of the pilger mill feed carriage and the operation of the mill's upper and lower pilger dies when the feed carriage pushing a tube through the pilger dies is a predetermined distance from the axis extending between the centers of the pair of pilger dies. The predetermined distance is selected to provide that facing end portions of the pushed and pusher tubes are positioned between the pilger dies. A second control scheme stops the retraction of the feed carriage after the feed carriage has moved the same predetermined distance measured from the trailing end of the pusher tube towards the inlet end of the pilger mill so that the next pusher tube provides that the upper and lower pilger dies are again stopped when the facing end portions of the succeeding pushed and pusher tubes are also between the pilger dies.

REFERENCES:
patent: 3015974 (1962-04-01), Orbom et al.
patent: 3659446 (1972-05-01), Gerretz et al.
patent: 3948070 (1976-04-01), Hentzschel et al.
patent: 4037444 (1977-07-01), Ledebur et al.
patent: 4037453 (1977-07-01), Remner et al.
patent: 4100786 (1978-07-01), Dorp et al.
patent: 4562713 (1986-01-01), Kondoh

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