Self-centering punch for billet centering machine or the like

Details Self-centering punch for billet centering machine or the like Self-centering punch for billet centering machine or the like

1977-04-18

1978-08-01

Keenan, Michael J.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

With interrelated clamp closer and tool mover

B21D 2804

Patent

active

041035305

ABSTRACT:
The disclosure relates to apparatus for center punching a hot metal billet preparatory to a piercing operation, in the production of seamless tubing. The apparatus provides a simple, reliable, mechanical arrangement effective to automatically compensate for normal variations in the diameter of successive hot metal billets, such that the center punching operation is carried out with greater accuracy than has heretofore been attained in regular production operations. The apparatus includes means for mechanically clamping a hot metal billet preparatory to center punching, and means for axially advancing a center punching tool into the end of the clamped billet. The center punching tool itself is mounted for limited transverse movement in relation to its advancing means, and is mechanically coupled to the clamping means by a compensating mechanism. Minor transverse adjustment of the position of the center punching tool in relation to the nominal axis of the apparatus, in order to obtain greater accuracy of alignment with the actual center line of a billet, is achieved by moving the center punching tool as a function of movement of the clamping mechanism. The clamping mechanism serves inherently to sense the actual diameter of the billet which is being clamped.

REFERENCES:
patent: 671430 (1901-04-01), Baker
patent: 2341602 (1944-02-01), Dewey
patent: 3091139 (1963-05-01), Jackson

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