Operating a rolling mill working on seamless tubing

Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work

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Details

72234, 72370, B21B 1702

Patent

active

044048327

ABSTRACT:
It was discovered that a rolling mandrel holding a hollow which is rolled in a multistrand mill should be advanced in a particular manner that relates to the stretching the hollow undergoes in the first and second stand, as well as to the speed of the unrolled hollow. A velocity profile has been developed accordingly.

REFERENCES:
patent: 3552170 (1971-01-01), Pfeiffer et al.
patent: 4289011 (1981-09-01), Yoshiwara et al.
patent: 4353238 (1982-10-01), Breton et al.

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