Method of pilger rolling of tubes
OwnerVladimir E. Ermakov, Viktor B. Makarov +4inventors
InventorsVladimir E. Ermakov, Viktor B. Makarov, Fikrat S. O. Seidaliev, Alexandr M. Nikiforov, Alexandr V. Bushev, July K. Dozortsev
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Abstract
The method resides in feeding a billet in portions into pilger rolls to be worked therein on a mandrel. The billet being positively turned about the rolling axis both in one direction and in the opposite direction in the course of deformation thereof and in the off-contact time when the billet is not engaged by the rolls.
Claims5
A method of pilger rolling of tubes, comprising the steps of feeding a billet in portions into pilger rolls and working said billet on a mandrel during each rolling period with said billet being positively turned about the rolling axis both in one direction and in the opposite direction over the entire rolling period during its deformation and in the off-contact time, when said billet comes out of engagement with said rolls;
- whereby the rolling of tubes of hard-to-form metals and alloys is practicable and whereby their properties are enhanced.
Dependencies are inferred from the claim text.