Plug changing mechanism for use in piercing mills

Details Plug changing mechanism for use in piercing mills Plug changing mechanism for use in piercing mills

1975-04-04

1977-05-10

Spruill, Robert Louis

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72209, B21B 2502

Patent

active

040220435

ABSTRACT:
A method for changing the plug in a mandrel in which the plug is attached to the mandrel by a detachable interlocking mechanism. The plug is maintained fixed to the mandrel during the displacement of the latter through the blank following piercing and the plug is detached from the mandrel to the rear of the piercing mill towards the end of the rearward displacement of the mandrel. A new plug is then fitted on to the mandrel during the subsequent displacement of the mandrel in the direction of the piercing mill.

REFERENCES:
patent: 3595109 (1971-07-01), Burroughs et al.
patent: 3691899 (1972-09-01), Antonietto et al.
patent: 3747385 (1973-07-01), Meurer
patent: 3762201 (1973-10-01), Schonfeld et al.
patent: 3791257 (1974-02-01), Frazier et al.
patent: 3927547 (1975-12-01), Schonfeld et al.
patent: 3931724 (1976-01-01), Berdyansky

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