Roll supporting device for a rolling mill arrangement

Details Roll supporting device for a rolling mill arrangement Roll supporting device for a rolling mill arrangement

1999-06-18

2000-12-12

Butler, Rodney A.

Metal deforming

By use of roller or roller-like tool-element

With carrier for roller-couple or tool-couple

148906, B21B 3100, B21B 3107

Patent

active

061582638

ABSTRACT:
A roll supporting device for a rolling mill arrangement, supporting rolls rotatably to housings by double row roller bearings or multi-row roller bearings. On surfaces of bearing rings and rollers of the roller bearing are provided carbonitrided layers of 0.80% or greater in carbon content and of Rockwell hardness HRC 58 or greater. The carbonitrided layers are formed to contain residual austenite content of 25-30% by volume. By virtue of the carbonitrided layers, the strength against the surface-initiated type damage to the contact surfaces of the bearing rings and the rollers is improved, so that the enhancement of the life of the roll supporting device, especially the lives of the bearing portions thereof, can be achieved to contribute to the prolongation of inspection and maintenance periods and to the reduction of inspection and maintenance costs.

REFERENCES:
patent: 5336338 (1994-08-01), Toda
patent: 5338377 (1994-08-01), Mitamura
patent: 5626974 (1997-05-01), Mitamura

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