B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
80/13
B21D 28/04 (2006.01) B21B 19/04 (2006.01) B21J 9/04 (2006.01) B21K 31/00 (2006.01)
Patent
CA 1067318
ABSTRACT OF THE DISCLOSURE 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 com- pensate 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 hte clamped billet. The center punching tool itself is mounted for linited transverse movement in relation to its advancing means, and is mechanically coupled to the clamp-0 ing means by a compensating mechanism. Minor transverse adjust- ment 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 move- ment of the clamping mechanism. The clamping mechanism serves inherently to sense the actual diameter of the billet which is being clamped.
298143
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