Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1974-08-14
1976-01-13
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72209, B21B 2502
Patent
active
039317242
ABSTRACT:
A device for use in piercing and plugging mills, comprising a rod with a plug and a gear, for keeping the rod from longitudinal displacements under the effect of the load arising during the piercing or plugging. The gear includes a fixed thrust bearing accommodating a revolving casing through which passes the rod that reciprocates in operation. A part of the internal surface of the revolving casing forms a working cone that faces the plug with its base. The gear also includes a lock to fix the rod when piercing or plugging a billet, and preferably mounted on the rod, and a drive for carrying the rod with the plug. The lock mounts a spring-biased cone positively encompassed round the circumference with radially floating cams. Before piercing, the spring-biased cone is slightly drawn off by the spring from the cams so that the latter can enter the lock which is then able to enter the casing. At the moment piercing is effected, the cone, admitted together with the cams into the casing, gets completely between the cams, forcing them against the working cone of the casing and blocking up (wedging) the rod within the casing. Piercing or plugging completed, the spring draws the cone off again from the cams, the latter enter, and the rod with the plug can be displaced by the drive into its initial position.
REFERENCES:
patent: 2480381 (1949-08-01), Offutt
patent: 2780119 (1957-02-01), Holmquist
patent: 3030835 (1962-04-01), Krause
Bashkatov Vladimir Porfirievich
Berdyansky Mark Grigorievich
Bezkrovny Konstantin Fedorovich
Dovgan Vladimir Semenovich
Kasyan Vladimir Khrisanfovich
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