Rolling mill finishing section

Details Rolling mill finishing section Rolling mill finishing section

2000-01-31

2001-02-13

Butler, Rodney A. (Department: 3725)

Metal deforming

By use of roller or roller-like tool-element

Plural roller-couples

C072S226000

Reexamination Certificate

active

06185972

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to continuous rolling mills for rolling long products such as bars, rods and the like, and is concerned in particular with an improved layout for the finishing section of such mills.
2. Description of the Prior Art
As shown for example in U.S. Pat. No. 5,325,697 (Shore et al.), the disclosure of which is herein incorporated by reference, it is known to roll products sequentially in finishing blocks and post finishing blocks (commonly referred to as “reducing sizing mills”) arranged along a common primary pass line. Although this practice has many advantages which have resulted in its widespread commercial acceptance, one disadvantage stems from the inability to continue utilizing the reducing sizing mill while the upstream finishing block is being serviced or reconfigured to roll different products.
SUMMARY OF THE INVENTION
The present invention addresses this problem by providing a secondary pass line which diverges from the primary pass line at an upstream junction preceding the finishing block, and bypasses the finishing block, and then rejoins the primary pass line at a downstream junction preceding the reducing sizing mill. Switches at the upstream and downstream junctions are operable in one mode to direct products exclusively along the primary pass line for sequential rolling in both the finishing block and the reducing sizing mill. Alternatively, when the finishing block is out of service for various reasons, e.g., when dummying individual stands, for normal maintenance, etc., the switches may be operated to divert products along the secondary pass line and around the finishing block for rolling solely in the reducing sizing mill. Optionally and preferably, at least one water cooling unit is shiftable between the primary and secondary rolling lines for cooling the products being directed to the reducing sizing mill in both of the aforesaid operating modes.


REFERENCES:
patent: 1844118 (1932-02-01), George
patent: 3625043 (1971-12-01), Neumann et al.
patent: 3774433 (1973-11-01), Pauels
patent: 5307663 (1994-05-01), Shore et al.
patent: 5325697 (1994-07-01), Shore et al.
patent: 5345805 (1994-09-01), Hauck
patent: 5577405 (1996-11-01), Shore et al.
patent: 5634257 (1997-06-01), Kajiwara et al.
patent: 5666707 (1997-09-01), Cryderman et al.
patent: 5682785 (1997-11-01), Müller et al.
patent: 5893288 (1999-04-01), Shore

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